/*
  Copyright (c) 2009-2017 Dave Gamble and cJSON contributors

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
*/

/* cJSON */
/* JSON parser in C. */

/* disable warnings about old C89 functions in MSVC */
#if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER)
#define _CRT_SECURE_NO_DEPRECATE
#endif

#ifdef __GNUC__
#pragma GCC visibility push(default)
#endif
#if defined(_MSC_VER)
#pragma warning (push)
/* disable warning about single line comments in system headers */
#pragma warning (disable : 4001)
#endif

#include <string.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <limits.h>
#include <ctype.h>

#ifdef ENABLE_LOCALES
#include <locale.h>
#endif

#if defined(_MSC_VER)
#pragma warning (pop)
#endif
#ifdef __GNUC__
#pragma GCC visibility pop
#endif

#include "cJSON.h"

/* define our own boolean type */
#define true ((cJSON_bool)1)
#define false ((cJSON_bool)0)

typedef struct {
    const unsigned char *json;
    size_t position;
} error;
static error global_error = { NULL, 0 };

CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
{
    return (const char*) (global_error.json + global_error.position);
}

CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item) {
    if (!cJSON_IsString(item)) {
        return NULL;
    }

    return item->valuestring;
}

/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 7)
    #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
#endif

CJSON_PUBLIC(const char*) cJSON_Version(void)
{
    static char version[15];
    sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);

    return version;
}

/* Case insensitive string comparison, doesn't consider two NULL pointers equal though */
static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2)
{
    if ((string1 == NULL) || (string2 == NULL))
    {
        return 1;
    }

    if (string1 == string2)
    {
        return 0;
    }

    for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++)
    {
        if (*string1 == '\0')
        {
            return 0;
        }
    }

    return tolower(*string1) - tolower(*string2);
}

typedef struct internal_hooks
{
    void *(*allocate)(size_t size);
    void (*deallocate)(void *pointer);
    void *(*reallocate)(void *pointer, size_t size);
} internal_hooks;

#if defined(_MSC_VER)
/* work around MSVC error C2322: '...' address of dillimport '...' is not static */
static void *internal_malloc(size_t size)
{
    return malloc(size);
}
static void internal_free(void *pointer)
{
    free(pointer);
}
static void *internal_realloc(void *pointer, size_t size)
{
    return realloc(pointer, size);
}
#else
#define internal_malloc malloc
#define internal_free free
#define internal_realloc realloc
#endif

static internal_hooks global_hooks = { internal_malloc, internal_free, internal_realloc };

static unsigned char* cJSON_strdup(const unsigned char* string, const internal_hooks * const hooks)
{
    size_t length = 0;
    unsigned char *copy = NULL;

    if (string == NULL)
    {
        return NULL;
    }

    length = strlen((const char*)string) + sizeof("");
    copy = (unsigned char*)hooks->allocate(length);
    if (copy == NULL)
    {
        return NULL;
    }
    memcpy(copy, string, length);

    return copy;
}

CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks)
{
    if (hooks == NULL)
    {
        /* Reset hooks */
        global_hooks.allocate = malloc;
        global_hooks.deallocate = free;
        global_hooks.reallocate = realloc;
        return;
    }

    global_hooks.allocate = malloc;
    if (hooks->malloc_fn != NULL)
    {
        global_hooks.allocate = hooks->malloc_fn;
    }

    global_hooks.deallocate = free;
    if (hooks->free_fn != NULL)
    {
        global_hooks.deallocate = hooks->free_fn;
    }

    /* use realloc only if both free and malloc are used */
    global_hooks.reallocate = NULL;
    if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free))
    {
        global_hooks.reallocate = realloc;
    }
}

/* Internal constructor. */
static cJSON *cJSON_New_Item(const internal_hooks * const hooks)
{
    cJSON* node = (cJSON*)hooks->allocate(sizeof(cJSON));
    if (node)
    {
        memset(node, '\0', sizeof(cJSON));
    }

    return node;
}

/* Delete a cJSON structure. */
CJSON_PUBLIC(void) cJSON_Delete(cJSON *item)
{
    cJSON *next = NULL;
    while (item != NULL)
    {
        next = item->next;
        if (!(item->type & cJSON_IsReference) && (item->child != NULL))
        {
            cJSON_Delete(item->child);
        }
        if (!(item->type & cJSON_IsReference) && (item->valuestring != NULL))
        {
            global_hooks.deallocate(item->valuestring);
        }
        if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
        {
            global_hooks.deallocate(item->string);
        }
        global_hooks.deallocate(item);
        item = next;
    }
}

/* get the decimal point character of the current locale */
static unsigned char get_decimal_point(void)
{
#ifdef ENABLE_LOCALES
    struct lconv *lconv = localeconv();
    return (unsigned char) lconv->decimal_point[0];
#else
    return '.';
#endif
}

typedef struct
{
    const unsigned char *content;
    size_t length;
    size_t offset;
    size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */
    internal_hooks hooks;
} parse_buffer;

/* check if the given size is left to read in a given parse buffer (starting with 1) */
#define can_read(buffer, size) ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length))
/* check if the buffer can be accessed at the given index (starting with 0) */
#define can_access_at_index(buffer, index) ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length))
#define cannot_access_at_index(buffer, index) (!can_access_at_index(buffer, index))
/* get a pointer to the buffer at the position */
#define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset)

/* Parse the input text to generate a number, and populate the result into item. */
static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
{
    double number = 0;
    unsigned char *after_end = NULL;
    unsigned char number_c_string[64];
    unsigned char decimal_point = get_decimal_point();
    size_t i = 0;

    if ((input_buffer == NULL) || (input_buffer->content == NULL))
    {
        return false;
    }

    /* copy the number into a temporary buffer and replace '.' with the decimal point
     * of the current locale (for strtod)
     * This also takes care of '\0' not necessarily being available for marking the end of the input */
    for (i = 0; (i < (sizeof(number_c_string) - 1)) && can_access_at_index(input_buffer, i); i++)
    {
        switch (buffer_at_offset(input_buffer)[i])
        {
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
            case '+':
            case '-':
            case 'e':
            case 'E':
                number_c_string[i] = buffer_at_offset(input_buffer)[i];
                break;

            case '.':
                number_c_string[i] = decimal_point;
                break;

            default:
                goto loop_end;
        }
    }
loop_end:
    number_c_string[i] = '\0';

    number = strtod((const char*)number_c_string, (char**)&after_end);
    if (number_c_string == after_end)
    {
        return false; /* parse_error */
    }

    item->valuedouble = number;

    /* use saturation in case of overflow */
    if (number >= INT_MAX)
    {
        item->valueint = INT_MAX;
    }
    else if (number <= INT_MIN)
    {
        item->valueint = INT_MIN;
    }
    else
    {
        item->valueint = (int)number;
    }

    item->type = cJSON_Number;

    input_buffer->offset += (size_t)(after_end - number_c_string);
    return true;
}

/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number)
{
    if (number >= INT_MAX)
    {
        object->valueint = INT_MAX;
    }
    else if (number <= INT_MIN)
    {
        object->valueint = INT_MIN;
    }
    else
    {
        object->valueint = (int)number;
    }

    return object->valuedouble = number;
}

typedef struct
{
    unsigned char *buffer;
    size_t length;
    size_t offset;
    size_t depth; /* current nesting depth (for formatted printing) */
    cJSON_bool noalloc;
    cJSON_bool format; /* is this print a formatted print */
    internal_hooks hooks;
} printbuffer;

/* realloc printbuffer if necessary to have at least "needed" bytes more */
static unsigned char* ensure(printbuffer * const p, size_t needed)
{
    unsigned char *newbuffer = NULL;
    size_t newsize = 0;

    if ((p == NULL) || (p->buffer == NULL))
    {
        return NULL;
    }

    if ((p->length > 0) && (p->offset >= p->length))
    {
        /* make sure that offset is valid */
        return NULL;
    }

    if (needed > INT_MAX)
    {
        /* sizes bigger than INT_MAX are currently not supported */
        return NULL;
    }

    needed += p->offset + 1;
    if (needed <= p->length)
    {
        return p->buffer + p->offset;
    }

    if (p->noalloc) {
        return NULL;
    }

    /* calculate new buffer size */
    if (needed > (INT_MAX / 2))
    {
        /* overflow of int, use INT_MAX if possible */
        if (needed <= INT_MAX)
        {
            newsize = INT_MAX;
        }
        else
        {
            return NULL;
        }
    }
    else
    {
        newsize = needed * 2;
    }

    if (p->hooks.reallocate != NULL)
    {
        /* reallocate with realloc if available */
        newbuffer = (unsigned char*)p->hooks.reallocate(p->buffer, newsize);
        if (newbuffer == NULL)
        {
            p->hooks.deallocate(p->buffer);
            p->length = 0;
            p->buffer = NULL;

            return NULL;
        }
    }
    else
    {
        /* otherwise reallocate manually */
        newbuffer = (unsigned char*)p->hooks.allocate(newsize);
        if (!newbuffer)
        {
            p->hooks.deallocate(p->buffer);
            p->length = 0;
            p->buffer = NULL;

            return NULL;
        }
        if (newbuffer)
        {
            memcpy(newbuffer, p->buffer, p->offset + 1);
        }
        p->hooks.deallocate(p->buffer);
    }
    p->length = newsize;
    p->buffer = newbuffer;

    return newbuffer + p->offset;
}

/* calculate the new length of the string in a printbuffer and update the offset */
static void update_offset(printbuffer * const buffer)
{
    const unsigned char *buffer_pointer = NULL;
    if ((buffer == NULL) || (buffer->buffer == NULL))
    {
        return;
    }
    buffer_pointer = buffer->buffer + buffer->offset;

    buffer->offset += strlen((const char*)buffer_pointer);
}

/* Render the number nicely from the given item into a string. */
static cJSON_bool print_number(const cJSON * const item, printbuffer * const output_buffer)
{
    unsigned char *output_pointer = NULL;
    double d = item->valuedouble;
    int length = 0;
    size_t i = 0;
    unsigned char number_buffer[26]; /* temporary buffer to print the number into */
    unsigned char decimal_point = get_decimal_point();
    double test;

    if (output_buffer == NULL)
    {
        return false;
    }

    /* This checks for NaN and Infinity */
    if ((d * 0) != 0)
    {
        length = sprintf((char*)number_buffer, "null");
    }
    else
    {
        /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */
        length = sprintf((char*)number_buffer, "%1.15g", d);

        /* Check whether the original double can be recovered */
        if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || ((double)test != d))
        {
            /* If not, print with 17 decimal places of precision */
            length = sprintf((char*)number_buffer, "%1.17g", d);
        }
    }

    /* sprintf failed or buffer overrun occured */
    if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1)))
    {
        return false;
    }

    /* reserve appropriate space in the output */
    output_pointer = ensure(output_buffer, (size_t)length + sizeof(""));
    if (output_pointer == NULL)
    {
        return false;
    }

    /* copy the printed number to the output and replace locale
     * dependent decimal point with '.' */
    for (i = 0; i < ((size_t)length); i++)
    {
        if (number_buffer[i] == decimal_point)
        {
            output_pointer[i] = '.';
            continue;
        }

        output_pointer[i] = number_buffer[i];
    }
    output_pointer[i] = '\0';

    output_buffer->offset += (size_t)length;

    return true;
}

/* parse 4 digit hexadecimal number */
static unsigned parse_hex4(const unsigned char * const input)
{
    unsigned int h = 0;
    size_t i = 0;

    for (i = 0; i < 4; i++)
    {
        /* parse digit */
        if ((input[i] >= '0') && (input[i] <= '9'))
        {
            h += (unsigned int) input[i] - '0';
        }
        else if ((input[i] >= 'A') && (input[i] <= 'F'))
        {
            h += (unsigned int) 10 + input[i] - 'A';
        }
        else if ((input[i] >= 'a') && (input[i] <= 'f'))
        {
            h += (unsigned int) 10 + input[i] - 'a';
        }
        else /* invalid */
        {
            return 0;
        }

        if (i < 3)
        {
            /* shift left to make place for the next nibble */
            h = h << 4;
        }
    }

    return h;
}

/* converts a UTF-16 literal to UTF-8
 * A literal can be one or two sequences of the form \uXXXX */
static unsigned char utf16_literal_to_utf8(const unsigned char * const input_pointer, const unsigned char * const input_end, unsigned char **output_pointer)
{
    long unsigned int codepoint = 0;
    unsigned int first_code = 0;
    const unsigned char *first_sequence = input_pointer;
    unsigned char utf8_length = 0;
    unsigned char utf8_position = 0;
    unsigned char sequence_length = 0;
    unsigned char first_byte_mark = 0;

    if ((input_end - first_sequence) < 6)
    {
        /* input ends unexpectedly */
        goto fail;
    }

    /* get the first utf16 sequence */
    first_code = parse_hex4(first_sequence + 2);

    /* check that the code is valid */
    if (((first_code >= 0xDC00) && (first_code <= 0xDFFF)))
    {
        goto fail;
    }

    /* UTF16 surrogate pair */
    if ((first_code >= 0xD800) && (first_code <= 0xDBFF))
    {
        const unsigned char *second_sequence = first_sequence + 6;
        unsigned int second_code = 0;
        sequence_length = 12; /* \uXXXX\uXXXX */

        if ((input_end - second_sequence) < 6)
        {
            /* input ends unexpectedly */
            goto fail;
        }

        if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u'))
        {
            /* missing second half of the surrogate pair */
            goto fail;
        }

        /* get the second utf16 sequence */
        second_code = parse_hex4(second_sequence + 2);
        /* check that the code is valid */
        if ((second_code < 0xDC00) || (second_code > 0xDFFF))
        {
            /* invalid second half of the surrogate pair */
            goto fail;
        }


        /* calculate the unicode codepoint from the surrogate pair */
        codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF));
    }
    else
    {
        sequence_length = 6; /* \uXXXX */
        codepoint = first_code;
    }

    /* encode as UTF-8
     * takes at maximum 4 bytes to encode:
     * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
    if (codepoint < 0x80)
    {
        /* normal ascii, encoding 0xxxxxxx */
        utf8_length = 1;
    }
    else if (codepoint < 0x800)
    {
        /* two bytes, encoding 110xxxxx 10xxxxxx */
        utf8_length = 2;
        first_byte_mark = 0xC0; /* 11000000 */
    }
    else if (codepoint < 0x10000)
    {
        /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
        utf8_length = 3;
        first_byte_mark = 0xE0; /* 11100000 */
    }
    else if (codepoint <= 0x10FFFF)
    {
        /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */
        utf8_length = 4;
        first_byte_mark = 0xF0; /* 11110000 */
    }
    else
    {
        /* invalid unicode codepoint */
        goto fail;
    }

    /* encode as utf8 */
    for (utf8_position = (unsigned char)(utf8_length - 1); utf8_position > 0; utf8_position--)
    {
        /* 10xxxxxx */
        (*output_pointer)[utf8_position] = (unsigned char)((codepoint | 0x80) & 0xBF);
        codepoint >>= 6;
    }
    /* encode first byte */
    if (utf8_length > 1)
    {
        (*output_pointer)[0] = (unsigned char)((codepoint | first_byte_mark) & 0xFF);
    }
    else
    {
        (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F);
    }

    *output_pointer += utf8_length;

    return sequence_length;

fail:
    return 0;
}

/* Parse the input text into an unescaped cinput, and populate item. */
static cJSON_bool parse_string(cJSON * const item, parse_buffer * const input_buffer)
{
    const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1;
    const unsigned char *input_end = buffer_at_offset(input_buffer) + 1;
    unsigned char *output_pointer = NULL;
    unsigned char *output = NULL;

    /* not a string */
    if (buffer_at_offset(input_buffer)[0] != '\"')
    {
        goto fail;
    }

    {
        /* calculate approximate size of the output (overestimate) */
        size_t allocation_length = 0;
        size_t skipped_bytes = 0;
        while (((size_t)(input_end - input_buffer->content) < input_buffer->length) && (*input_end != '\"'))
        {
            /* is escape sequence */
            if (input_end[0] == '\\')
            {
                if ((size_t)(input_end + 1 - input_buffer->content) >= input_buffer->length)
                {
                    /* prevent buffer overflow when last input character is a backslash */
                    goto fail;
                }
                skipped_bytes++;
                input_end++;
            }
            input_end++;
        }
        if (((size_t)(input_end - input_buffer->content) >= input_buffer->length) || (*input_end != '\"'))
        {
            goto fail; /* string ended unexpectedly */
        }

        /* This is at most how much we need for the output */
        allocation_length = (size_t) (input_end - buffer_at_offset(input_buffer)) - skipped_bytes;
        output = (unsigned char*)input_buffer->hooks.allocate(allocation_length + sizeof(""));
        if (output == NULL)
        {
            goto fail; /* allocation failure */
        }
    }

    output_pointer = output;
    /* loop through the string literal */
    while (input_pointer < input_end)
    {
        if (*input_pointer != '\\')
        {
            *output_pointer++ = *input_pointer++;
        }
        /* escape sequence */
        else
        {
            unsigned char sequence_length = 2;
            if ((input_end - input_pointer) < 1)
            {
                goto fail;
            }

            switch (input_pointer[1])
            {
                case 'b':
                    *output_pointer++ = '\b';
                    break;
                case 'f':
                    *output_pointer++ = '\f';
                    break;
                case 'n':
                    *output_pointer++ = '\n';
                    break;
                case 'r':
                    *output_pointer++ = '\r';
                    break;
                case 't':
                    *output_pointer++ = '\t';
                    break;
                case '\"':
                case '\\':
                case '/':
                    *output_pointer++ = input_pointer[1];
                    break;

                /* UTF-16 literal */
                case 'u':
                    sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer);
                    if (sequence_length == 0)
                    {
                        /* failed to convert UTF16-literal to UTF-8 */
                        goto fail;
                    }
                    break;

                default:
                    goto fail;
            }
            input_pointer += sequence_length;
        }
    }

    /* zero terminate the output */
    *output_pointer = '\0';

    item->type = cJSON_String;
    item->valuestring = (char*)output;

    input_buffer->offset = (size_t) (input_end - input_buffer->content);
    input_buffer->offset++;

    return true;

fail:
    if (output != NULL)
    {
        input_buffer->hooks.deallocate(output);
    }

    if (input_pointer != NULL)
    {
        input_buffer->offset = (size_t)(input_pointer - input_buffer->content);
    }

    return false;
}

/* Render the cstring provided to an escaped version that can be printed. */
static cJSON_bool print_string_ptr(const unsigned char * const input, printbuffer * const output_buffer)
{
    const unsigned char *input_pointer = NULL;
    unsigned char *output = NULL;
    unsigned char *output_pointer = NULL;
    size_t output_length = 0;
    /* numbers of additional characters needed for escaping */
    size_t escape_characters = 0;

    if (output_buffer == NULL)
    {
        return false;
    }

    /* empty string */
    if (input == NULL)
    {
        output = ensure(output_buffer, sizeof("\"\""));
        if (output == NULL)
        {
            return false;
        }
        strcpy((char*)output, "\"\"");

        return true;
    }

    /* set "flag" to 1 if something needs to be escaped */
    for (input_pointer = input; *input_pointer; input_pointer++)
    {
        switch (*input_pointer)
        {
            case '\"':
            case '\\':
            case '\b':
            case '\f':
            case '\n':
            case '\r':
            case '\t':
                /* one character escape sequence */
                escape_characters++;
                break;
            default:
                if (*input_pointer < 32)
                {
                    /* UTF-16 escape sequence uXXXX */
                    escape_characters += 5;
                }
                break;
        }
    }
    output_length = (size_t)(input_pointer - input) + escape_characters;

    output = ensure(output_buffer, output_length + sizeof("\"\""));
    if (output == NULL)
    {
        return false;
    }

    /* no characters have to be escaped */
    if (escape_characters == 0)
    {
        output[0] = '\"';
        memcpy(output + 1, input, output_length);
        output[output_length + 1] = '\"';
        output[output_length + 2] = '\0';

        return true;
    }

    output[0] = '\"';
    output_pointer = output + 1;
    /* copy the string */
    for (input_pointer = input; *input_pointer != '\0'; (void)input_pointer++, output_pointer++)
    {
        if ((*input_pointer > 31) && (*input_pointer != '\"') && (*input_pointer != '\\'))
        {
            /* normal character, copy */
            *output_pointer = *input_pointer;
        }
        else
        {
            /* character needs to be escaped */
            *output_pointer++ = '\\';
            switch (*input_pointer)
            {
                case '\\':
                    *output_pointer = '\\';
                    break;
                case '\"':
                    *output_pointer = '\"';
                    break;
                case '\b':
                    *output_pointer = 'b';
                    break;
                case '\f':
                    *output_pointer = 'f';
                    break;
                case '\n':
                    *output_pointer = 'n';
                    break;
                case '\r':
                    *output_pointer = 'r';
                    break;
                case '\t':
                    *output_pointer = 't';
                    break;
                default:
                    /* escape and print as unicode codepoint */
                    sprintf((char*)output_pointer, "u%04x", *input_pointer);
                    output_pointer += 4;
                    break;
            }
        }
    }
    output[output_length + 1] = '\"';
    output[output_length + 2] = '\0';

    return true;
}

/* Invoke print_string_ptr (which is useful) on an item. */
static cJSON_bool print_string(const cJSON * const item, printbuffer * const p)
{
    return print_string_ptr((unsigned char*)item->valuestring, p);
}

/* Predeclare these prototypes. */
static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer);
static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer);
static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer);
static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer);
static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer);
static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer);

/* Utility to jump whitespace and cr/lf */
static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
{
    if ((buffer == NULL) || (buffer->content == NULL))
    {
        return NULL;
    }

    while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32))
    {
       buffer->offset++;
    }

    if (buffer->offset == buffer->length)
    {
        buffer->offset--;
    }

    return buffer;
}

/* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */
static parse_buffer *skip_utf8_bom(parse_buffer * const buffer)
{
    if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0))
    {
        return NULL;
    }

    if (can_access_at_index(buffer, 4) && (strncmp((const char*)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0))
    {
        buffer->offset += 3;
    }

    return buffer;
}

/* Parse an object - create a new root, and populate. */
CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
{
    parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } };
    cJSON *item = NULL;

    /* reset error position */
    global_error.json = NULL;
    global_error.position = 0;

    if (value == NULL)
    {
        goto fail;
    }

    buffer.content = (const unsigned char*)value;
    buffer.length = strlen((const char*)value) + sizeof("");
    buffer.offset = 0;
    buffer.hooks = global_hooks;

    item = cJSON_New_Item(&global_hooks);
    if (item == NULL) /* memory fail */
    {
        goto fail;
    }

    if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer))))
    {
        /* parse failure. ep is set. */
        goto fail;
    }

    /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
    if (require_null_terminated)
    {
        buffer_skip_whitespace(&buffer);
        if ((buffer.offset >= buffer.length) || buffer_at_offset(&buffer)[0] != '\0')
        {
            goto fail;
        }
    }
    if (return_parse_end)
    {
        *return_parse_end = (const char*)buffer_at_offset(&buffer);
    }

    return item;

fail:
    if (item != NULL)
    {
        cJSON_Delete(item);
    }

    if (value != NULL)
    {
        error local_error;
        local_error.json = (const unsigned char*)value;
        local_error.position = 0;

        if (buffer.offset < buffer.length)
        {
            local_error.position = buffer.offset;
        }
        else if (buffer.length > 0)
        {
            local_error.position = buffer.length - 1;
        }

        if (return_parse_end != NULL)
        {
            *return_parse_end = (const char*)local_error.json + local_error.position;
        }

        global_error = local_error;
    }

    return NULL;
}

/* Default options for cJSON_Parse */
CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value)
{
    return cJSON_ParseWithOpts(value, 0, 0);
}

#define cjson_min(a, b) ((a < b) ? a : b)

static unsigned char *print(const cJSON * const item, cJSON_bool format, const internal_hooks * const hooks)
{
    static const size_t default_buffer_size = 256;
    printbuffer buffer[1];
    unsigned char *printed = NULL;

    memset(buffer, 0, sizeof(buffer));

    /* create buffer */
    buffer->buffer = (unsigned char*) hooks->allocate(default_buffer_size);
    buffer->length = default_buffer_size;
    buffer->format = format;
    buffer->hooks = *hooks;
    if (buffer->buffer == NULL)
    {
        goto fail;
    }

    /* print the value */
    if (!print_value(item, buffer))
    {
        goto fail;
    }
    update_offset(buffer);

    /* check if reallocate is available */
    if (hooks->reallocate != NULL)
    {
        printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1);
        if (printed == NULL) {
            goto fail;
        }
        buffer->buffer = NULL;
    }
    else /* otherwise copy the JSON over to a new buffer */
    {
        printed = (unsigned char*) hooks->allocate(buffer->offset + 1);
        if (printed == NULL)
        {
            goto fail;
        }
        memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1));
        printed[buffer->offset] = '\0'; /* just to be sure */

        /* free the buffer */
        hooks->deallocate(buffer->buffer);
    }

    return printed;

fail:
    if (buffer->buffer != NULL)
    {
        hooks->deallocate(buffer->buffer);
    }

    if (printed != NULL)
    {
        hooks->deallocate(printed);
    }

    return NULL;
}

/* Render a cJSON item/entity/structure to text. */
CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item)
{
    return (char*)print(item, true, &global_hooks);
}

CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item)
{
    return (char*)print(item, false, &global_hooks);
}

CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt)
{
    printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };

    if (prebuffer < 0)
    {
        return NULL;
    }

    p.buffer = (unsigned char*)global_hooks.allocate((size_t)prebuffer);
    if (!p.buffer)
    {
        return NULL;
    }

    p.length = (size_t)prebuffer;
    p.offset = 0;
    p.noalloc = false;
    p.format = fmt;
    p.hooks = global_hooks;

    if (!print_value(item, &p))
    {
        global_hooks.deallocate(p.buffer);
        return NULL;
    }

    return (char*)p.buffer;
}

CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buf, const int len, const cJSON_bool fmt)
{
    printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };

    if ((len < 0) || (buf == NULL))
    {
        return false;
    }

    p.buffer = (unsigned char*)buf;
    p.length = (size_t)len;
    p.offset = 0;
    p.noalloc = true;
    p.format = fmt;
    p.hooks = global_hooks;

    return print_value(item, &p);
}

/* Parser core - when encountering text, process appropriately. */
static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer)
{
    if ((input_buffer == NULL) || (input_buffer->content == NULL))
    {
        return false; /* no input */
    }

    /* parse the different types of values */
    /* null */
    if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0))
    {
        item->type = cJSON_NULL;
        input_buffer->offset += 4;
        return true;
    }
    /* false */
    if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0))
    {
        item->type = cJSON_False;
        input_buffer->offset += 5;
        return true;
    }
    /* true */
    if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "true", 4) == 0))
    {
        item->type = cJSON_True;
        item->valueint = 1;
        input_buffer->offset += 4;
        return true;
    }
    /* string */
    if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"'))
    {
        return parse_string(item, input_buffer);
    }
    /* number */
    if (can_access_at_index(input_buffer, 0) && ((buffer_at_offset(input_buffer)[0] == '-') || ((buffer_at_offset(input_buffer)[0] >= '0') && (buffer_at_offset(input_buffer)[0] <= '9'))))
    {
        return parse_number(item, input_buffer);
    }
    /* array */
    if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '['))
    {
        return parse_array(item, input_buffer);
    }
    /* object */
    if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{'))
    {
        return parse_object(item, input_buffer);
    }

    return false;
}

/* Render a value to text. */
static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer)
{
    unsigned char *output = NULL;

    if ((item == NULL) || (output_buffer == NULL))
    {
        return false;
    }

    switch ((item->type) & 0xFF)
    {
        case cJSON_NULL:
            output = ensure(output_buffer, 5);
            if (output == NULL)
            {
                return false;
            }
            strcpy((char*)output, "null");
            return true;

        case cJSON_False:
            output = ensure(output_buffer, 6);
            if (output == NULL)
            {
                return false;
            }
            strcpy((char*)output, "false");
            return true;

        case cJSON_True:
            output = ensure(output_buffer, 5);
            if (output == NULL)
            {
                return false;
            }
            strcpy((char*)output, "true");
            return true;

        case cJSON_Number:
            return print_number(item, output_buffer);

        case cJSON_Raw:
        {
            size_t raw_length = 0;
            if (item->valuestring == NULL)
            {
                return false;
            }

            raw_length = strlen(item->valuestring) + sizeof("");
            output = ensure(output_buffer, raw_length);
            if (output == NULL)
            {
                return false;
            }
            memcpy(output, item->valuestring, raw_length);
            return true;
        }

        case cJSON_String:
            return print_string(item, output_buffer);

        case cJSON_Array:
            return print_array(item, output_buffer);

        case cJSON_Object:
            return print_object(item, output_buffer);

        default:
            return false;
    }
}

/* Build an array from input text. */
static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer)
{
    cJSON *head = NULL; /* head of the linked list */
    cJSON *current_item = NULL;

    if (input_buffer->depth >= CJSON_NESTING_LIMIT)
    {
        return false; /* to deeply nested */
    }
    input_buffer->depth++;

    if (buffer_at_offset(input_buffer)[0] != '[')
    {
        /* not an array */
        goto fail;
    }

    input_buffer->offset++;
    buffer_skip_whitespace(input_buffer);
    if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ']'))
    {
        /* empty array */
        goto success;
    }

    /* check if we skipped to the end of the buffer */
    if (cannot_access_at_index(input_buffer, 0))
    {
        input_buffer->offset--;
        goto fail;
    }

    /* step back to character in front of the first element */
    input_buffer->offset--;
    /* loop through the comma separated array elements */
    do
    {
        /* allocate next item */
        cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
        if (new_item == NULL)
        {
            goto fail; /* allocation failure */
        }

        /* attach next item to list */
        if (head == NULL)
        {
            /* start the linked list */
            current_item = head = new_item;
        }
        else
        {
            /* add to the end and advance */
            current_item->next = new_item;
            new_item->prev = current_item;
            current_item = new_item;
        }

        /* parse next value */
        input_buffer->offset++;
        buffer_skip_whitespace(input_buffer);
        if (!parse_value(current_item, input_buffer))
        {
            goto fail; /* failed to parse value */
        }
        buffer_skip_whitespace(input_buffer);
    }
    while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));

    if (cannot_access_at_index(input_buffer, 0) || buffer_at_offset(input_buffer)[0] != ']')
    {
        goto fail; /* expected end of array */
    }

success:
    input_buffer->depth--;

    item->type = cJSON_Array;
    item->child = head;

    input_buffer->offset++;

    return true;

fail:
    if (head != NULL)
    {
        cJSON_Delete(head);
    }

    return false;
}

/* Render an array to text */
static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer)
{
    unsigned char *output_pointer = NULL;
    size_t length = 0;
    cJSON *current_element = item->child;

    if (output_buffer == NULL)
    {
        return false;
    }

    /* Compose the output array. */
    /* opening square bracket */
    output_pointer = ensure(output_buffer, 1);
    if (output_pointer == NULL)
    {
        return false;
    }

    *output_pointer = '[';
    output_buffer->offset++;
    output_buffer->depth++;

    while (current_element != NULL)
    {
        if (!print_value(current_element, output_buffer))
        {
            return false;
        }
        update_offset(output_buffer);
        if (current_element->next)
        {
            length = (size_t) (output_buffer->format ? 2 : 1);
            output_pointer = ensure(output_buffer, length + 1);
            if (output_pointer == NULL)
            {
                return false;
            }
            *output_pointer++ = ',';
            if(output_buffer->format)
            {
                *output_pointer++ = ' ';
            }
            *output_pointer = '\0';
            output_buffer->offset += length;
        }
        current_element = current_element->next;
    }

    output_pointer = ensure(output_buffer, 2);
    if (output_pointer == NULL)
    {
        return false;
    }
    *output_pointer++ = ']';
    *output_pointer = '\0';
    output_buffer->depth--;

    return true;
}

/* Build an object from the text. */
static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer)
{
    cJSON *head = NULL; /* linked list head */
    cJSON *current_item = NULL;

    if (input_buffer->depth >= CJSON_NESTING_LIMIT)
    {
        return false; /* to deeply nested */
    }
    input_buffer->depth++;

    if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '{'))
    {
        goto fail; /* not an object */
    }

    input_buffer->offset++;
    buffer_skip_whitespace(input_buffer);
    if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '}'))
    {
        goto success; /* empty object */
    }

    /* check if we skipped to the end of the buffer */
    if (cannot_access_at_index(input_buffer, 0))
    {
        input_buffer->offset--;
        goto fail;
    }

    /* step back to character in front of the first element */
    input_buffer->offset--;
    /* loop through the comma separated array elements */
    do
    {
        /* allocate next item */
        cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
        if (new_item == NULL)
        {
            goto fail; /* allocation failure */
        }

        /* attach next item to list */
        if (head == NULL)
        {
            /* start the linked list */
            current_item = head = new_item;
        }
        else
        {
            /* add to the end and advance */
            current_item->next = new_item;
            new_item->prev = current_item;
            current_item = new_item;
        }

        /* parse the name of the child */
        input_buffer->offset++;
        buffer_skip_whitespace(input_buffer);
        if (!parse_string(current_item, input_buffer))
        {
            goto fail; /* faile to parse name */
        }
        buffer_skip_whitespace(input_buffer);

        /* swap valuestring and string, because we parsed the name */
        current_item->string = current_item->valuestring;
        current_item->valuestring = NULL;

        if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != ':'))
        {
            goto fail; /* invalid object */
        }

        /* parse the value */
        input_buffer->offset++;
        buffer_skip_whitespace(input_buffer);
        if (!parse_value(current_item, input_buffer))
        {
            goto fail; /* failed to parse value */
        }
        buffer_skip_whitespace(input_buffer);
    }
    while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));

    if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '}'))
    {
        goto fail; /* expected end of object */
    }

success:
    input_buffer->depth--;

    item->type = cJSON_Object;
    item->child = head;

    input_buffer->offset++;
    return true;

fail:
    if (head != NULL)
    {
        cJSON_Delete(head);
    }

    return false;
}

/* Render an object to text. */
static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer)
{
    unsigned char *output_pointer = NULL;
    size_t length = 0;
    cJSON *current_item = item->child;

    if (output_buffer == NULL)
    {
        return false;
    }

    /* Compose the output: */
    length = (size_t) (output_buffer->format ? 2 : 1); /* fmt: {\n */
    output_pointer = ensure(output_buffer, length + 1);
    if (output_pointer == NULL)
    {
        return false;
    }

    *output_pointer++ = '{';
    output_buffer->depth++;
    if (output_buffer->format)
    {
        *output_pointer++ = '\n';
    }
    output_buffer->offset += length;

    while (current_item)
    {
        if (output_buffer->format)
        {
            size_t i;
            output_pointer = ensure(output_buffer, output_buffer->depth);
            if (output_pointer == NULL)
            {
                return false;
            }
            for (i = 0; i < output_buffer->depth; i++)
            {
                *output_pointer++ = '\t';
            }
            output_buffer->offset += output_buffer->depth;
        }

        /* print key */
        if (!print_string_ptr((unsigned char*)current_item->string, output_buffer))
        {
            return false;
        }
        update_offset(output_buffer);

        length = (size_t) (output_buffer->format ? 2 : 1);
        output_pointer = ensure(output_buffer, length);
        if (output_pointer == NULL)
        {
            return false;
        }
        *output_pointer++ = ':';
        if (output_buffer->format)
        {
            *output_pointer++ = '\t';
        }
        output_buffer->offset += length;

        /* print value */
        if (!print_value(current_item, output_buffer))
        {
            return false;
        }
        update_offset(output_buffer);

        /* print comma if not last */
        length = (size_t) ((output_buffer->format ? 1 : 0) + (current_item->next ? 1 : 0));
        output_pointer = ensure(output_buffer, length + 1);
        if (output_pointer == NULL)
        {
            return false;
        }
        if (current_item->next)
        {
            *output_pointer++ = ',';
        }

        if (output_buffer->format)
        {
            *output_pointer++ = '\n';
        }
        *output_pointer = '\0';
        output_buffer->offset += length;

        current_item = current_item->next;
    }

    output_pointer = ensure(output_buffer, output_buffer->format ? (output_buffer->depth + 1) : 2);
    if (output_pointer == NULL)
    {
        return false;
    }
    if (output_buffer->format)
    {
        size_t i;
        for (i = 0; i < (output_buffer->depth - 1); i++)
        {
            *output_pointer++ = '\t';
        }
    }
    *output_pointer++ = '}';
    *output_pointer = '\0';
    output_buffer->depth--;

    return true;
}

/* Get Array size/item / object item. */
CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array)
{
    cJSON *child = NULL;
    size_t size = 0;

    if (array == NULL)
    {
        return 0;
    }

    child = array->child;

    while(child != NULL)
    {
        size++;
        child = child->next;
    }

    /* FIXME: Can overflow here. Cannot be fixed without breaking the API */

    return (int)size;
}

static cJSON* get_array_item(const cJSON *array, size_t index)
{
    cJSON *current_child = NULL;

    if (array == NULL)
    {
        return NULL;
    }

    current_child = array->child;
    while ((current_child != NULL) && (index > 0))
    {
        index--;
        current_child = current_child->next;
    }

    return current_child;
}

CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index)
{
    if (index < 0)
    {
        return NULL;
    }

    return get_array_item(array, (size_t)index);
}

static cJSON *get_object_item(const cJSON * const object, const char * const name, const cJSON_bool case_sensitive)
{
    cJSON *current_element = NULL;

    if ((object == NULL) || (name == NULL))
    {
        return NULL;
    }

    current_element = object->child;
    if (case_sensitive)
    {
        while ((current_element != NULL) && (strcmp(name, current_element->string) != 0))
        {
            current_element = current_element->next;
        }
    }
    else
    {
        while ((current_element != NULL) && (case_insensitive_strcmp((const unsigned char*)name, (const unsigned char*)(current_element->string)) != 0))
        {
            current_element = current_element->next;
        }
    }

    return current_element;
}

CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string)
{
    return get_object_item(object, string, false);
}

CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string)
{
    return get_object_item(object, string, true);
}

CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string)
{
    return cJSON_GetObjectItem(object, string) ? 1 : 0;
}

/* Utility for array list handling. */
static void suffix_object(cJSON *prev, cJSON *item)
{
    prev->next = item;
    item->prev = prev;
}

/* Utility for handling references. */
static cJSON *create_reference(const cJSON *item, const internal_hooks * const hooks)
{
    cJSON *reference = NULL;
    if (item == NULL)
    {
        return NULL;
    }

    reference = cJSON_New_Item(hooks);
    if (reference == NULL)
    {
        return NULL;
    }

    memcpy(reference, item, sizeof(cJSON));
    reference->string = NULL;
    reference->type |= cJSON_IsReference;
    reference->next = reference->prev = NULL;
    return reference;
}

static cJSON_bool add_item_to_array(cJSON *array, cJSON *item)
{
    cJSON *child = NULL;

    if ((item == NULL) || (array == NULL))
    {
        return false;
    }

    child = array->child;

    if (child == NULL)
    {
        /* list is empty, start new one */
        array->child = item;
    }
    else
    {
        /* append to the end */
        while (child->next)
        {
            child = child->next;
        }
        suffix_object(child, item);
    }

    return true;
}

/* Add item to array/object. */
CJSON_PUBLIC(void) cJSON_AddItemToArray(cJSON *array, cJSON *item)
{
    add_item_to_array(array, item);
}

#if defined(__clang__) || (defined(__GNUC__)  && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
    #pragma GCC diagnostic push
#endif
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif
/* helper function to cast away const */
static void* cast_away_const(const void* string)
{
    return (void*)string;
}
#if defined(__clang__) || (defined(__GNUC__)  && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
    #pragma GCC diagnostic pop
#endif


static cJSON_bool add_item_to_object(cJSON * const object, const char * const string, cJSON * const item, const internal_hooks * const hooks, const cJSON_bool constant_key)
{
    char *new_key = NULL;
    int new_type = cJSON_Invalid;

    if ((object == NULL) || (string == NULL) || (item == NULL))
    {
        return false;
    }

    if (constant_key)
    {
        new_key = (char*)cast_away_const(string);
        new_type = item->type | cJSON_StringIsConst;
    }
    else
    {
        new_key = (char*)cJSON_strdup((const unsigned char*)string, hooks);
        if (new_key == NULL)
        {
            return false;
        }

        new_type = item->type & ~cJSON_StringIsConst;
    }

    if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
    {
        hooks->deallocate(item->string);
    }

    item->string = new_key;
    item->type = new_type;

    return add_item_to_array(object, item);
}

CJSON_PUBLIC(void) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item)
{
    add_item_to_object(object, string, item, &global_hooks, false);
}

/* Add an item to an object with constant string as key */
CJSON_PUBLIC(void) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
{
    add_item_to_object(object, string, item, &global_hooks, true);
}

CJSON_PUBLIC(void) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)
{
    if (array == NULL)
    {
        return;
    }

    add_item_to_array(array, create_reference(item, &global_hooks));
}

CJSON_PUBLIC(void) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item)
{
    if ((object == NULL) || (string == NULL))
    {
        return;
    }

    add_item_to_object(object, string, create_reference(item, &global_hooks), &global_hooks, false);
}

CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name)
{
    cJSON *null = cJSON_CreateNull();
    if (add_item_to_object(object, name, null, &global_hooks, false))
    {
        return null;
    }

    cJSON_Delete(null);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name)
{
    cJSON *true_item = cJSON_CreateTrue();
    if (add_item_to_object(object, name, true_item, &global_hooks, false))
    {
        return true_item;
    }

    cJSON_Delete(true_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name)
{
    cJSON *false_item = cJSON_CreateFalse();
    if (add_item_to_object(object, name, false_item, &global_hooks, false))
    {
        return false_item;
    }

    cJSON_Delete(false_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean)
{
    cJSON *bool_item = cJSON_CreateBool(boolean);
    if (add_item_to_object(object, name, bool_item, &global_hooks, false))
    {
        return bool_item;
    }

    cJSON_Delete(bool_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number)
{
    cJSON *number_item = cJSON_CreateNumber(number);
    if (add_item_to_object(object, name, number_item, &global_hooks, false))
    {
        return number_item;
    }

    cJSON_Delete(number_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string)
{
    cJSON *string_item = cJSON_CreateString(string);
    if (add_item_to_object(object, name, string_item, &global_hooks, false))
    {
        return string_item;
    }

    cJSON_Delete(string_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw)
{
    cJSON *raw_item = cJSON_CreateRaw(raw);
    if (add_item_to_object(object, name, raw_item, &global_hooks, false))
    {
        return raw_item;
    }

    cJSON_Delete(raw_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name)
{
    cJSON *object_item = cJSON_CreateObject();
    if (add_item_to_object(object, name, object_item, &global_hooks, false))
    {
        return object_item;
    }

    cJSON_Delete(object_item);
    return NULL;
}

CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name)
{
    cJSON *array = cJSON_CreateArray();
    if (add_item_to_object(object, name, array, &global_hooks, false))
    {
        return array;
    }

    cJSON_Delete(array);
    return NULL;
}

CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item)
{
    if ((parent == NULL) || (item == NULL))
    {
        return NULL;
    }

    if (item->prev != NULL)
    {
        /* not the first element */
        item->prev->next = item->next;
    }
    if (item->next != NULL)
    {
        /* not the last element */
        item->next->prev = item->prev;
    }

    if (item == parent->child)
    {
        /* first element */
        parent->child = item->next;
    }
    /* make sure the detached item doesn't point anywhere anymore */
    item->prev = NULL;
    item->next = NULL;

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
{
    if (which < 0)
    {
        return NULL;
    }

    return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which));
}

CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which)
{
    cJSON_Delete(cJSON_DetachItemFromArray(array, which));
}

CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string)
{
    cJSON *to_detach = cJSON_GetObjectItem(object, string);

    return cJSON_DetachItemViaPointer(object, to_detach);
}

CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string)
{
    cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string);

    return cJSON_DetachItemViaPointer(object, to_detach);
}

CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string)
{
    cJSON_Delete(cJSON_DetachItemFromObject(object, string));
}

CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string)
{
    cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string));
}

/* Replace array/object items with new ones. */
CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
{
    cJSON *after_inserted = NULL;

    if (which < 0)
    {
        return;
    }

    after_inserted = get_array_item(array, (size_t)which);
    if (after_inserted == NULL)
    {
        add_item_to_array(array, newitem);
        return;
    }

    newitem->next = after_inserted;
    newitem->prev = after_inserted->prev;
    after_inserted->prev = newitem;
    if (after_inserted == array->child)
    {
        array->child = newitem;
    }
    else
    {
        newitem->prev->next = newitem;
    }
}

CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement)
{
    if ((parent == NULL) || (replacement == NULL) || (item == NULL))
    {
        return false;
    }

    if (replacement == item)
    {
        return true;
    }

    replacement->next = item->next;
    replacement->prev = item->prev;

    if (replacement->next != NULL)
    {
        replacement->next->prev = replacement;
    }
    if (replacement->prev != NULL)
    {
        replacement->prev->next = replacement;
    }
    if (parent->child == item)
    {
        parent->child = replacement;
    }

    item->next = NULL;
    item->prev = NULL;
    cJSON_Delete(item);

    return true;
}

CJSON_PUBLIC(void) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
{
    if (which < 0)
    {
        return;
    }

    cJSON_ReplaceItemViaPointer(array, get_array_item(array, (size_t)which), newitem);
}

static cJSON_bool replace_item_in_object(cJSON *object, const char *string, cJSON *replacement, cJSON_bool case_sensitive)
{
    if ((replacement == NULL) || (string == NULL))
    {
        return false;
    }

    /* replace the name in the replacement */
    if (!(replacement->type & cJSON_StringIsConst) && (replacement->string != NULL))
    {
        cJSON_free(replacement->string);
    }
    replacement->string = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
    replacement->type &= ~cJSON_StringIsConst;

    cJSON_ReplaceItemViaPointer(object, get_object_item(object, string, case_sensitive), replacement);

    return true;
}

CJSON_PUBLIC(void) cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem)
{
    replace_item_in_object(object, string, newitem, false);
}

CJSON_PUBLIC(void) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object, const char *string, cJSON *newitem)
{
    replace_item_in_object(object, string, newitem, true);
}

/* Create basic types: */
CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_NULL;
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_True;
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_False;
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool b)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = b ? cJSON_True : cJSON_False;
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_Number;
        item->valuedouble = num;

        /* use saturation in case of overflow */
        if (num >= INT_MAX)
        {
            item->valueint = INT_MAX;
        }
        else if (num <= INT_MIN)
        {
            item->valueint = INT_MIN;
        }
        else
        {
            item->valueint = (int)num;
        }
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_String;
        item->valuestring = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
        if(!item->valuestring)
        {
            cJSON_Delete(item);
            return NULL;
        }
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if (item != NULL)
    {
        item->type = cJSON_String | cJSON_IsReference;
        item->valuestring = (char*)cast_away_const(string);
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if (item != NULL) {
        item->type = cJSON_Object | cJSON_IsReference;
        item->child = (cJSON*)cast_away_const(child);
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child) {
    cJSON *item = cJSON_New_Item(&global_hooks);
    if (item != NULL) {
        item->type = cJSON_Array | cJSON_IsReference;
        item->child = (cJSON*)cast_away_const(child);
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type = cJSON_Raw;
        item->valuestring = (char*)cJSON_strdup((const unsigned char*)raw, &global_hooks);
        if(!item->valuestring)
        {
            cJSON_Delete(item);
            return NULL;
        }
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if(item)
    {
        item->type=cJSON_Array;
    }

    return item;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void)
{
    cJSON *item = cJSON_New_Item(&global_hooks);
    if (item)
    {
        item->type = cJSON_Object;
    }

    return item;
}

/* Create Arrays: */
CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count)
{
    size_t i = 0;
    cJSON *n = NULL;
    cJSON *p = NULL;
    cJSON *a = NULL;

    if ((count < 0) || (numbers == NULL))
    {
        return NULL;
    }

    a = cJSON_CreateArray();
    for(i = 0; a && (i < (size_t)count); i++)
    {
        n = cJSON_CreateNumber(numbers[i]);
        if (!n)
        {
            cJSON_Delete(a);
            return NULL;
        }
        if(!i)
        {
            a->child = n;
        }
        else
        {
            suffix_object(p, n);
        }
        p = n;
    }

    return a;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
{
    size_t i = 0;
    cJSON *n = NULL;
    cJSON *p = NULL;
    cJSON *a = NULL;

    if ((count < 0) || (numbers == NULL))
    {
        return NULL;
    }

    a = cJSON_CreateArray();

    for(i = 0; a && (i < (size_t)count); i++)
    {
        n = cJSON_CreateNumber((double)numbers[i]);
        if(!n)
        {
            cJSON_Delete(a);
            return NULL;
        }
        if(!i)
        {
            a->child = n;
        }
        else
        {
            suffix_object(p, n);
        }
        p = n;
    }

    return a;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count)
{
    size_t i = 0;
    cJSON *n = NULL;
    cJSON *p = NULL;
    cJSON *a = NULL;

    if ((count < 0) || (numbers == NULL))
    {
        return NULL;
    }

    a = cJSON_CreateArray();

    for(i = 0;a && (i < (size_t)count); i++)
    {
        n = cJSON_CreateNumber(numbers[i]);
        if(!n)
        {
            cJSON_Delete(a);
            return NULL;
        }
        if(!i)
        {
            a->child = n;
        }
        else
        {
            suffix_object(p, n);
        }
        p = n;
    }

    return a;
}

CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char **strings, int count)
{
    size_t i = 0;
    cJSON *n = NULL;
    cJSON *p = NULL;
    cJSON *a = NULL;

    if ((count < 0) || (strings == NULL))
    {
        return NULL;
    }

    a = cJSON_CreateArray();

    for (i = 0; a && (i < (size_t)count); i++)
    {
        n = cJSON_CreateString(strings[i]);
        if(!n)
        {
            cJSON_Delete(a);
            return NULL;
        }
        if(!i)
        {
            a->child = n;
        }
        else
        {
            suffix_object(p,n);
        }
        p = n;
    }

    return a;
}

/* Duplication */
CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse)
{
    cJSON *newitem = NULL;
    cJSON *child = NULL;
    cJSON *next = NULL;
    cJSON *newchild = NULL;

    /* Bail on bad ptr */
    if (!item)
    {
        goto fail;
    }
    /* Create new item */
    newitem = cJSON_New_Item(&global_hooks);
    if (!newitem)
    {
        goto fail;
    }
    /* Copy over all vars */
    newitem->type = item->type & (~cJSON_IsReference);
    newitem->valueint = item->valueint;
    newitem->valuedouble = item->valuedouble;
    if (item->valuestring)
    {
        newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring, &global_hooks);
        if (!newitem->valuestring)
        {
            goto fail;
        }
    }
    if (item->string)
    {
        newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string, &global_hooks);
        if (!newitem->string)
        {
            goto fail;
        }
    }
    /* If non-recursive, then we're done! */
    if (!recurse)
    {
        return newitem;
    }
    /* Walk the ->next chain for the child. */
    child = item->child;
    while (child != NULL)
    {
        newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */
        if (!newchild)
        {
            goto fail;
        }
        if (next != NULL)
        {
            /* If newitem->child already set, then crosswire ->prev and ->next and move on */
            next->next = newchild;
            newchild->prev = next;
            next = newchild;
        }
        else
        {
            /* Set newitem->child and move to it */
            newitem->child = newchild;
            next = newchild;
        }
        child = child->next;
    }

    return newitem;

fail:
    if (newitem != NULL)
    {
        cJSON_Delete(newitem);
    }

    return NULL;
}

CJSON_PUBLIC(void) cJSON_Minify(char *json)
{
    unsigned char *into = (unsigned char*)json;

    if (json == NULL)
    {
        return;
    }

    while (*json)
    {
        if (*json == ' ')
        {
            json++;
        }
        else if (*json == '\t')
        {
            /* Whitespace characters. */
            json++;
        }
        else if (*json == '\r')
        {
            json++;
        }
        else if (*json=='\n')
        {
            json++;
        }
        else if ((*json == '/') && (json[1] == '/'))
        {
            /* double-slash comments, to end of line. */
            while (*json && (*json != '\n'))
            {
                json++;
            }
        }
        else if ((*json == '/') && (json[1] == '*'))
        {
            /* multiline comments. */
            while (*json && !((*json == '*') && (json[1] == '/')))
            {
                json++;
            }
            json += 2;
        }
        else if (*json == '\"')
        {
            /* string literals, which are \" sensitive. */
            *into++ = (unsigned char)*json++;
            while (*json && (*json != '\"'))
            {
                if (*json == '\\')
                {
                    *into++ = (unsigned char)*json++;
                }
                *into++ = (unsigned char)*json++;
            }
            *into++ = (unsigned char)*json++;
        }
        else
        {
            /* All other characters. */
            *into++ = (unsigned char)*json++;
        }
    }

    /* and null-terminate. */
    *into = '\0';
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_Invalid;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_False;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xff) == cJSON_True;
}


CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & (cJSON_True | cJSON_False)) != 0;
}
CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_NULL;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_Number;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_String;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_Array;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_Object;
}

CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item)
{
    if (item == NULL)
    {
        return false;
    }

    return (item->type & 0xFF) == cJSON_Raw;
}

CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive)
{
    if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF)) || cJSON_IsInvalid(a))
    {
        return false;
    }

    /* check if type is valid */
    switch (a->type & 0xFF)
    {
        case cJSON_False:
        case cJSON_True:
        case cJSON_NULL:
        case cJSON_Number:
        case cJSON_String:
        case cJSON_Raw:
        case cJSON_Array:
        case cJSON_Object:
            break;

        default:
            return false;
    }

    /* identical objects are equal */
    if (a == b)
    {
        return true;
    }

    switch (a->type & 0xFF)
    {
        /* in these cases and equal type is enough */
        case cJSON_False:
        case cJSON_True:
        case cJSON_NULL:
            return true;

        case cJSON_Number:
            if (a->valuedouble == b->valuedouble)
            {
                return true;
            }
            return false;

        case cJSON_String:
        case cJSON_Raw:
            if ((a->valuestring == NULL) || (b->valuestring == NULL))
            {
                return false;
            }
            if (strcmp(a->valuestring, b->valuestring) == 0)
            {
                return true;
            }

            return false;

        case cJSON_Array:
        {
            cJSON *a_element = a->child;
            cJSON *b_element = b->child;

            for (; (a_element != NULL) && (b_element != NULL);)
            {
                if (!cJSON_Compare(a_element, b_element, case_sensitive))
                {
                    return false;
                }

                a_element = a_element->next;
                b_element = b_element->next;
            }

            /* one of the arrays is longer than the other */
            if (a_element != b_element) {
                return false;
            }

            return true;
        }

        case cJSON_Object:
        {
            cJSON *a_element = NULL;
            cJSON *b_element = NULL;
            cJSON_ArrayForEach(a_element, a)
            {
                /* TODO This has O(n^2) runtime, which is horrible! */
                b_element = get_object_item(b, a_element->string, case_sensitive);
                if (b_element == NULL)
                {
                    return false;
                }

                if (!cJSON_Compare(a_element, b_element, case_sensitive))
                {
                    return false;
                }
            }

            /* doing this twice, once on a and b to prevent true comparison if a subset of b
             * TODO: Do this the proper way, this is just a fix for now */
            cJSON_ArrayForEach(b_element, b)
            {
                a_element = get_object_item(a, b_element->string, case_sensitive);
                if (a_element == NULL)
                {
                    return false;
                }

                if (!cJSON_Compare(b_element, a_element, case_sensitive))
                {
                    return false;
                }
            }

            return true;
        }

        default:
            return false;
    }
}

CJSON_PUBLIC(void *) cJSON_malloc(size_t size)
{
    return global_hooks.allocate(size);
}

CJSON_PUBLIC(void) cJSON_free(void *object)
{
    global_hooks.deallocate(object);
}

/*
  Copyright (c) 2009-2017 Dave Gamble and cJSON contributors

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
*/

#ifndef cJSON__h
#define cJSON__h

#ifdef __cplusplus
extern "C"
{
#endif

/* project version */
#define CJSON_VERSION_MAJOR 1
#define CJSON_VERSION_MINOR 7
#define CJSON_VERSION_PATCH 7

#include <stddef.h>

/* cJSON Types: */
#define cJSON_Invalid (0)
#define cJSON_False  (1 << 0)
#define cJSON_True   (1 << 1)
#define cJSON_NULL   (1 << 2)
#define cJSON_Number (1 << 3)
#define cJSON_String (1 << 4)
#define cJSON_Array  (1 << 5)
#define cJSON_Object (1 << 6)
#define cJSON_Raw    (1 << 7) /* raw json */

#define cJSON_IsReference 256
#define cJSON_StringIsConst 512

/* The cJSON structure: */
typedef struct cJSON
{
    /* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */
    struct cJSON *next;
    struct cJSON *prev;
    /* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */
    struct cJSON *child;

    /* The type of the item, as above. */
    int type;

    /* The item's string, if type==cJSON_String  and type == cJSON_Raw */
    char *valuestring;
    /* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */
    int valueint;
    /* The item's number, if type==cJSON_Number */
    double valuedouble;

    /* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
    char *string;
} cJSON;

typedef struct cJSON_Hooks
{
      void *(*malloc_fn)(size_t sz);
      void (*free_fn)(void *ptr);
} cJSON_Hooks;

typedef int cJSON_bool;

#if !defined(__WINDOWS__) && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) || defined(_WIN32))
#define __WINDOWS__
#endif
#ifdef __WINDOWS__

/* When compiling for windows, we specify a specific calling convention to avoid issues where we are being called from a project with a different default calling convention.  For windows you have 2 define options:

CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols
CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default)
CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol

For *nix builds that support visibility attribute, you can define similar behavior by

setting default visibility to hidden by adding
-fvisibility=hidden (for gcc)
or
-xldscope=hidden (for sun cc)
to CFLAGS

then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does

*/

/* export symbols by default, this is necessary for copy pasting the C and header file */
#if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) && !defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_EXPORT_SYMBOLS
#endif

#if defined(CJSON_HIDE_SYMBOLS)
#define CJSON_PUBLIC(type)   type __stdcall
#elif defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_PUBLIC(type)   __declspec(dllexport) type __stdcall
#elif defined(CJSON_IMPORT_SYMBOLS)
#define CJSON_PUBLIC(type)   __declspec(dllimport) type __stdcall
#endif
#else /* !WIN32 */
#if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined (__SUNPRO_C)) && defined(CJSON_API_VISIBILITY)
#define CJSON_PUBLIC(type)   __attribute__((visibility("default"))) type
#else
#define CJSON_PUBLIC(type) type
#endif
#endif

/* Limits how deeply nested arrays/objects can be before cJSON rejects to parse them.
 * This is to prevent stack overflows. */
#ifndef CJSON_NESTING_LIMIT
#define CJSON_NESTING_LIMIT 1000
#endif

/* returns the version of cJSON as a string */
CJSON_PUBLIC(const char*) cJSON_Version(void);

/* Supply malloc, realloc and free functions to cJSON */
CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks);

/* Memory Management: the caller is always responsible to free the results from all variants of cJSON_Parse (with cJSON_Delete) and cJSON_Print (with stdlib free, cJSON_Hooks.free_fn, or cJSON_free as appropriate). The exception is cJSON_PrintPreallocated, where the caller has full responsibility of the buffer. */
/* Supply a block of JSON, and this returns a cJSON object you can interrogate. */
CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value);
/* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */
/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end will contain a pointer to the error so will match cJSON_GetErrorPtr(). */
CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated);

/* Render a cJSON entity to text for transfer/storage. */
CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item);
/* Render a cJSON entity to text for transfer/storage without any formatting. */
CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item);
/* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */
CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt);
/* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */
/* NOTE: cJSON is not always 100% accurate in estimating how much memory it will use, so to be safe allocate 5 bytes more than you actually need */
CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format);
/* Delete a cJSON entity and all subentities. */
CJSON_PUBLIC(void) cJSON_Delete(cJSON *c);

/* Returns the number of items in an array (or object). */
CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array);
/* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index);
/* Get item "string" from object. Case insensitive. */
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string);
/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */
CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void);

/* Check if the item is a string and return its valuestring */
CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item);

/* These functions check the type of an item */
CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item);

/* These calls create a cJSON item of the appropriate type. */
CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean);
CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num);
CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string);
/* raw json */
CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw);
CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void);

/* Create a string where valuestring references a string so
 * it will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string);
/* Create an object/arrray that only references it's elements so
 * they will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child);
CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child);

/* These utilities create an Array of count items. */
CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char **strings, int count);

/* Append item to the specified array/object. */
CJSON_PUBLIC(void) cJSON_AddItemToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(void) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
/* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object.
 * WARNING: When this function was used, make sure to always check that (item->type & cJSON_StringIsConst) is zero before
 * writing to `item->string` */
CJSON_PUBLIC(void) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item);
/* Append reference to item to the specified array/object. Use this when you want to add an existing cJSON to a new cJSON, but don't want to corrupt your existing cJSON. */
CJSON_PUBLIC(void) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(void) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);

/* Remove/Detatch items from Arrays/Objects. */
CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string);

/* Update array items. */
CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem); /* Shifts pre-existing items to the right. */
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement);
CJSON_PUBLIC(void) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
CJSON_PUBLIC(void) cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem);
CJSON_PUBLIC(void) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object,const char *string,cJSON *newitem);

/* Duplicate a cJSON item */
CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse);
/* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will
need to be released. With recurse!=0, it will duplicate any children connected to the item.
The item->next and ->prev pointers are always zero on return from Duplicate. */
/* Recursively compare two cJSON items for equality. If either a or b is NULL or invalid, they will be considered unequal.
 * case_sensitive determines if object keys are treated case sensitive (1) or case insensitive (0) */
CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive);


CJSON_PUBLIC(void) cJSON_Minify(char *json);

/* Helper functions for creating and adding items to an object at the same time.
 * They return the added item or NULL on failure. */
CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean);
CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number);
CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string);
CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw);
CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name);

/* When assigning an integer value, it needs to be propagated to valuedouble too. */
#define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number))
/* helper for the cJSON_SetNumberValue macro */
CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number);
#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number))

/* Macro for iterating over an array or object */
#define cJSON_ArrayForEach(element, array) for(element = (array != NULL) ? (array)->child : NULL; element != NULL; element = element->next)

/* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */
CJSON_PUBLIC(void *) cJSON_malloc(size_t size);
CJSON_PUBLIC(void) cJSON_free(void *object);

#ifdef __cplusplus
}
#endif

#endif

/*
    web.h - BSD LICENSE - Andreas Fredriksson

ABOUT:
    This is a web server intended for debugging tools inside a
    program with a continously running main loop. It's intended to be used when
    all you need is something tiny and performance isn't a key concern.
    NOTE: this is a single header port of Andreas Fredriksson
    Webby(https://github.com/deplinenoise/webby).

    Features
    - Single header library to be easy to embed into your code.
    - No dynamic memory allocations -- server memory is completely fixed
    - No threading, all I/O and serving happens on the calling thread
    - Supports socket keep-alives
    - Supports the 100-Continue scheme for file uploading
    - Basic support for WebSockets is available.

    Because request/response I/O is synchronous on the calling thread, performance
    will suffer when you are serving data. For the use-cases wby is intended for,
    this is fine. You can still run wby in a background thread at your
    discretion if this is a problem.

DEFINES:
    WBY_IMPLEMENTATION
        Generates the implementation of the library into the included file.
        If not provided the library is in header only mode and can be included
        in other headers or source files without problems. But only ONE file
        should hold the implementation.

    WBY_STATIC
        The generated implementation will stay private inside implementation
        file and all internal symbols and functions will only be visible inside
        that file.

    WBY_ASSERT
    WBY_USE_ASSERT
        If you define WBY_USE_ASSERT without defining ASSERT web.h
        will use assert.h and asssert(). Otherwise it will use your assert
        method. If you do not define WBY_USE_ASSERT no additional checks
        will be added. This is the only C standard library function used
        by web.

    WBY_UINT_PTR
        If your compiler is C99 you do not need to define this.
        Otherwise, web will try default assignments for them
        and validate them at compile time. If they are incorrect, you will
        get compile errors and will need to define them yourself.

        You can define this to 'size_t' if you use the standard library,
        otherwise it needs to be able to hold the maximum addressable memory
        space. If you do not define this it will default to unsigned long.


LICENSE: (BSD)
    Copyright (c) 2016, Andreas Fredriksson, Micha Mettke
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation
       and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
    ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

CONTRIBUTORS:
    Andreas Fredriksson (implementation)
    Micha Mettke (single header conversion)

USAGE:
    Request handling
        When you configure the server, you give it a function pointer to your
        dispatcher. The dispatcher is called by wby when a request has been fully
        read into memory and is ready for processing. The socket the request came in on
        has then been switched to blocking mode, and you're free to read any request
        data using `wby_read()` (if present, check `content_length`) and then write
        your response.
        There are two ways to generate a response; explicit size or chunked.

    When you know the size of the data
        When you know in advance how big the response is going to be, you should pass
        that size in bytes to `wby_response_begin()` (it will be sent as the
        Content-Length header). You then call `wby_write()` to push that data out, and
        finally `wby_response_end()` to finalize the response and prepare the socket
        for a new request.

    When the response size is dynamic
        Sometimes you want to generate an arbitrary amount of text in the response, and
        you don't know how much that will be. Rather than buffering everything in RAM,
        you can use chunked encoding. First call `wby_response_begin()` as normal, but
        pass it -1 for the content length. This triggers sending the
        `Transfer-Encoding: chunked` header. You then call `wby_write()` as desired
        until the response is complete. When you're done, call `wby_response_end()` to finish up.

EXAMPLES:
    for a actual working example please look inside tests/wby_test.c */
#if 0
/* request and websocket handling callback */
static int dispatch(struct wby_con *connection, void *pArg);
static int websocket_connect(struct wby_con *conn, void *pArg);
static void websocket_connected(struct wby_con *con, void *pArg);
static int websocket_frame(struct wby_con *conn, const struct wby_frame *frame, void *pArg);
static void websocket_closed(struct wby_con *connection, void *pArg);

int main(int argc, const char * argv[])
{
    /* setup config */
    struct wby_config config;
    memset(config, 0, sizeof(config));
    config.address = "127.0.0.1";
    config.port = 8888;
    config.connection_max = 8;
    config.request_buffer_size = 2048;
    config.io_buffer_size = 8192;
    config.dispatch = dispatch;
    config.ws_connect = websocket_connect;
    config.ws_connected = websocket_connected;
    config.ws_frame = websocket_frame;
    config.ws_closed = websocket_closed;

    /* compute and allocate needed memory and start server */
    struct wby_server server;
    size_t needed_memory;
    wby_server_init(&server, &config, &needed_memory);
    void *memory = calloc(needed_memory, 1);
    wby_server_start(&server, memory);
    while (1) {
        wby_server_update(&server);

    }
    wby_server_stop(&server);
    free(memory);
}
#endif
 /* ===============================================================
 *
 *                          HEADER
 *
 * =============================================================== */
#ifndef WBY_H_
#define WBY_H_

#ifdef __cplusplus
extern "C" {
#endif

#ifdef WBY_STATIC
#define WBY_API static
#else
#define WBY_API extern
#endif

#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 19901L)
#include <stdint.h>
#ifndef WBY_UINT_PTR
#define WBY_UINT_PTR uintptr_t
#endif
#else
#ifndef WBY_UINT_PTR
#define WBY_UINT_PTR unsigned long
#endif
#endif
typedef unsigned char wby_byte;
typedef WBY_UINT_PTR wby_size;
typedef WBY_UINT_PTR wby_ptr;

#define WBY_OK (0)
#define WBY_FLAG(x) (1 << (x))

#ifndef WBY_MAX_HEADERS
#define WBY_MAX_HEADERS 64
#endif

struct wby_header {
    const char *name;
    const char *value;
};

/* A HTTP request. */
struct wby_request {
    const char *method;
    /* The method of the request, e.g. "GET", "POST" and so on */
    const char *uri;
    /* The URI that was used. */
    const char *http_version;
    /* The used HTTP version */
    const char *query_params;
    /* The query parameters passed in the URL, or NULL if none were passed. */
    int content_length;
    /* The number of bytes of request body that are available via WebbyRead() */
    int header_count;
    /* The number of headers */
    struct wby_header headers[WBY_MAX_HEADERS];
    /* Request headers */
};

/* Connection state, as published to the serving callback. */
struct wby_con {
    struct wby_request request;
    /* The request being served. Read-only. */
    void *user_data;
    /* User data. Read-write. wby doesn't care about this. */
};

struct wby_frame {
    wby_byte flags;
    wby_byte opcode;
    wby_byte header_size;
    wby_byte padding_;
    wby_byte mask_key[4];
    int payload_length;
};

enum wby_websock_flags {
    WBY_WSF_FIN    = WBY_FLAG(0),
    WBY_WSF_MASKED = WBY_FLAG(1)
};

enum wby_websock_operation {
    WBY_WSOP_CONTINUATION    = 0,
    WBY_WSOP_TEXT_FRAME      = 1,
    WBY_WSOP_BINARY_FRAME    = 2,
    WBY_WSOP_CLOSE           = 8,
    WBY_WSOP_PING            = 9,
    WBY_WSOP_PONG            = 10
};

/* Configuration data required for starting a server. */
typedef void(*wby_log_f)(const char *msg);
struct wby_config {
    void *userdata;
    /* userdata which will be passed */
    const char *address;
    /* The bind address. Must be a textual IP address. */
    unsigned short port;
    /* The port to listen to. */
    unsigned int connection_max;
    /* Maximum number of simultaneous connections. */
    wby_size request_buffer_size;
    /* The size of the request buffer. This must be big enough to contain all
    * headers and the request line sent by the client. 2-4k is a good size for
    * this buffer. */
    wby_size io_buffer_size;
    /* The size of the I/O buffer, used when writing the reponse. 4k is a good
    * choice for this buffer.*/
    wby_log_f log;
    /* Optional callback function that receives debug log text (without newlines). */
    int(*dispatch)(struct wby_con *con, void *userdata);
    /* Request dispatcher function. This function is called when the request
    * structure is ready.
    * If you decide to handle the request, call wby_response_begin(),
    * wby_write() and wby_response_end() and then return 0. Otherwise, return a
    * non-zero value to have Webby send back a 404 response. */
    int(*ws_connect)(struct wby_con*, void *userdata);
    /*WebSocket connection dispatcher. Called when an incoming request wants to
    * update to a WebSocket connection.
    * Return 0 to allow the connection.
    * Return 1 to ignore the connection.*/
    void (*ws_connected)(struct wby_con*, void *userdata);
    /* Called when a WebSocket connection has been established.*/
    void (*ws_closed)(struct wby_con*, void *userdata);
    /*Called when a WebSocket connection has been closed.*/
    int (*ws_frame)(struct wby_con*, const struct wby_frame *frame, void *userdata);
    /*Called when a WebSocket data frame is incoming.
    * Call wby_read() to read the payload data.
    * Return non-zero to close the connection.*/
};

struct wby_connection;
struct wby_server {
    struct wby_config config;
    /* server configuration */
    wby_size memory_size;
    /* minimum required memory */
    wby_ptr socket;
    /* server socket */
    wby_size con_count;
    /* number of active connection */
    struct wby_connection *con;
    /* connections */
#ifdef _WIN32
    int windows_socket_initialized;
    /* whether WSAStartup had to be called on Windows */
#endif
};

WBY_API void wby_init(struct wby_server*, const struct wby_config*,
                            wby_size *needed_memory);
/*  this function clears the server and calculates the needed memory to run
    Input:
    -   filled server configuration data to calculate the needed memory
    Output:
    -   needed memory for the server to run
*/
WBY_API int wby_start(struct wby_server*, void *memory);
/*  this function starts running the server in the specificed memory space. Size
 *  must be at least big enough as determined in the wby_server_init().
    Input:
    -   allocated memory space to create the server into
*/
WBY_API void wby_update(struct wby_server*);
/* updates the server by being called frequenctly (at least once a frame) */
WBY_API void wby_stop(struct wby_server*);
/* stops and shutdown the server */
WBY_API int wby_response_begin(struct wby_con*, int status_code, int content_length,
                                    const struct wby_header headers[], int header_count);
/*  this function begins a response
    Input:
    -   HTTP status code to send. (Normally 200).
    -   size in bytes you intend to write, or -1 for chunked encoding
    -   array of HTTP headers to transmit (can be NULL of header_count == 0)
    -   number of headers in the array
    Output:
    -   returns 0 on success, non-zero on error.
*/
WBY_API void wby_response_end(struct wby_con*);
/*  this function finishes a response. When you're done wirting the response
 *  body, call this function. this makes sure chunked encoding is terminated
 *  correctly and that the connection is setup for reuse. */
WBY_API int wby_read(struct wby_con*, void *ptr, wby_size len);
/*  this function reads data from the request body. Only read what the client
 *  has priovided (via content_length) parameter, or you will end up blocking
 *  forever.
    Input:
    - pointer to a memory block that will be filled
    - size of the memory block to fill
*/
WBY_API int wby_write(struct wby_con*, const void *ptr, wby_size len);
/*  this function writes a response data to the connection. If you're not using
 *  chunked encoding, be careful not to send more than the specified content
 *  length. You can call this function multiple times as long as the total
 *  number of bytes matches up with the content length.
    Input:
    - pointer to a memory block that will be send
    - size of the memory block to send
*/
WBY_API int wby_frame_begin(struct wby_con*, int opcode);
/*  this function begins an outgoing websocket frame */
WBY_API int wby_frame_end(struct wby_con*);
/*  this function finishes an outgoing websocket frame */
WBY_API int wby_find_query_var(const char *buf, const char *name, char *dst, wby_size dst_len);
/*  this function is a helper function to lookup a query parameter given a URL
 *  encoded string. Returns the size of the returned data, or -1 if the query
 *  var wasn't found. */
WBY_API const char* wby_find_header(struct wby_con*, const char *name);
/*  this convenience function to find a header in a request. Returns the value
 *  of the specified header, or NULL if its was not present. */

#ifdef __cplusplus
}
#endif
#endif /* WBY_H_ */
/* ===============================================================
 *
 *                      IMPLEMENTATION
 *
 * ===============================================================*/
#ifdef WBY_IMPLEMENTATION

typedef int wby__check_ptr_size[(sizeof(void*) == sizeof(WBY_UINT_PTR)) ? 1 : -1];
#define WBY_LEN(a) (sizeof(a)/sizeof((a)[0]))
#define WBY_UNUSED(a) ((void)(a))

#ifdef WBY_USE_ASSERT
#ifndef WBY_ASSERT
#include <assert.h>
#define WBY_ASSERT(expr) assert(expr)
#endif
#else
#define WBY_ASSERT(expr)
#endif

#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <ctype.h>
#include <time.h>

#define WBY_SOCK(s) ((wby_socket)(s))
#define WBY_INTERN static
#define WBY_GLOBAL static
#define WBY_STORAGE static

/* ===============================================================
 *                          UTIL
 * ===============================================================*/
struct wby_buffer {
    wby_size used;
    /* current buffer size */
    wby_size max;
    /* buffer capacity */
    wby_byte *data;
    /* pointer inside a global buffer */
};

WBY_INTERN void
wby_dbg(wby_log_f log, const char *fmt, ...)
{
    char buffer[1024];
    va_list args;
    if (!log) return;

    va_start(args, fmt);
    vsnprintf(buffer, sizeof buffer, fmt, args);
    va_end(args);
    buffer[(sizeof buffer)-1] = '\0';
    log(buffer);
}

WBY_INTERN int
wb_peek_request_size(const wby_byte *buf, int len)
{
    int i;
    int max = len - 3;
    for (i = 0; i < max; ++i) {
        if ('\r' != buf[i + 0]) continue;
        if ('\n' != buf[i + 1]) continue;
        if ('\r' != buf[i + 2]) continue;
        if ('\n' != buf[i + 3]) continue;
        /* OK; we have CRLFCRLF which indicates the end of the header section */
        return i + 4;
    }
    return -1;
}

WBY_INTERN char*
wby_skipws(char *p)
{
    for (;;) {
        char ch = *p;
        if (' ' == ch || '\t' == ch) ++p;
        else break;
    }
    return p;
}

#define WBY_TOK_SKIPWS WBY_FLAG(0)
WBY_INTERN int
wby_tok_inplace(char *buf, const char* separator, char *tokens[], int max, int flags)
{
    char *b = buf;
    char *e = buf;
    int token_count = 0;
    int separator_len = (int)strlen(separator);
    while (token_count < max) {
        if (flags & WBY_TOK_SKIPWS)
            b = wby_skipws(b);
        if (NULL != (e = strstr(b, separator))) {
            int len = (int) (e - b);
            if (len > 0)
                tokens[token_count++] = b;
            *e = '\0';
            b = e + separator_len;
        } else {
            tokens[token_count++] = b;
            break;
        }
    }
    return token_count;
}

WBY_INTERN wby_size
wby_make_websocket_header(wby_byte buffer[10], wby_byte opcode,
    int payload_len, int fin)
{
    buffer[0] = (wby_byte)((fin ? 0x80 : 0x00) | opcode);
    if (payload_len < 126) {
        buffer[1] = (wby_byte)(payload_len & 0x7f);
        return 2;
    } else if (payload_len < 65536) {
        buffer[1] = 126;
        buffer[2] = (wby_byte)(payload_len >> 8);
        buffer[3] = (wby_byte)payload_len;
        return 4;
    } else {
        buffer[1] = 127;
        /* Ignore high 32-bits. I didn't want to require 64-bit types and typdef hell in the API. */
        buffer[2] = buffer[3] = buffer[4] = buffer[5] = 0;
        buffer[6] = (wby_byte)(payload_len >> 24);
        buffer[7] = (wby_byte)(payload_len >> 16);
        buffer[8] = (wby_byte)(payload_len >> 8);
        buffer[9] = (wby_byte)payload_len;
        return 10;
    }
}

WBY_INTERN int
wby_read_buffered_data(int *data_left, struct wby_buffer* buffer,
    char **dest_ptr, wby_size *dest_len)
{
    int offset, read_size;
    int left = *data_left;
    int len;
    if (left == 0)
        return 0;

    len = (int) *dest_len;
    offset = (int)buffer->used - left;
    read_size = (len > left) ? left : len;
    memcpy(*dest_ptr, buffer->data + offset, (wby_size)read_size);

    (*dest_ptr) += read_size;
    (*dest_len) -= (wby_size) read_size;
    (*data_left) -= read_size;
    return read_size;
}

/* ---------------------------------------------------------------
 *                          SOCKET
 * ---------------------------------------------------------------*/
#ifdef _WIN32
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
typedef SOCKET wby_socket;
typedef int wby_socklen;
typedef char wby_sockopt;

#if defined(__GNUC__)
#define WBY_ALIGN(x) __attribute__((aligned(x)))
#else
#define WBY_ALIGN(x) __declspec(align(x))
#endif

#define WBY_INVALID_SOCKET INVALID_SOCKET
#define snprintf _snprintf

WBY_INTERN int
wby_socket_error(void)
{
    return WSAGetLastError();
}

#if !defined(__GNUC__)
WBY_INTERN int
strcasecmp(const char *a, const char *b)
{
    return _stricmp(a, b);
}

WBY_INTERN int
strncasecmp(const char *a, const char *b, wby_size len)
{
    return _strnicmp(a, b, len);
}
#endif

WBY_INTERN int
wby_socket_set_blocking(wby_socket socket, int blocking)
{
    u_long val = !blocking;
    return ioctlsocket(socket, FIONBIO, &val);
}

WBY_INTERN int
wby_socket_is_valid(wby_socket socket)
{
    return (INVALID_SOCKET != socket);
}

WBY_INTERN void
wby_socket_close(wby_socket socket)
{
    closesocket(socket);
}

WBY_INTERN int
wby_socket_is_blocking_error(int error)
{
    return WSAEWOULDBLOCK == error;
}

#else /* UNIX */

#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <strings.h>

typedef int wby_socket;
typedef socklen_t wby_socklen;
typedef int wby_sockopt;

#define WBY_ALIGN(x) __attribute__((aligned(x)))
#define WBY_INVALID_SOCKET (-1)

WBY_INTERN int
wby_socket_error(void)
{
    return errno;
}

WBY_INTERN int
wby_socket_is_valid(wby_socket socket)
{
    return (socket > 0);
}

WBY_INTERN void
wby_socket_close(wby_socket socket)
{
    close(socket);
}

WBY_INTERN int
wby_socket_is_blocking_error(int error)
{
    return (EAGAIN == error);
}

WBY_INTERN int
wby_socket_set_blocking(wby_socket socket, int blocking)
{
    int flags = fcntl(socket, F_GETFL, 0);
    if (flags < 0) return flags;
    flags = blocking ? (flags & ~O_NONBLOCK) : (flags | O_NONBLOCK);
    return fcntl(socket, F_SETFL, flags);
}
#endif

WBY_INTERN int
wby_socket_config_incoming(wby_socket socket)
{
    wby_sockopt off = 0;
    int err;
    if ((err = wby_socket_set_blocking(socket, 0)) != WBY_OK) return err;
    setsockopt(socket, SOL_SOCKET, SO_LINGER, (const char*) &off, sizeof(int));
    return 0;
}

WBY_INTERN int
wby_socket_send(wby_socket socket, const wby_byte *buffer, int size)
{
    while (size > 0) {
        long err = send(socket, (const char*)buffer, (wby_size)size, 0);
        if (err <= 0) return 1;
        buffer += err;
        size -= (int)err;
    }
    return 0;
}

/* Read as much as possible without blocking while there is buffer space. */
enum {WBY_FILL_OK, WBY_FILL_ERROR, WBY_FILL_FULL};
WBY_INTERN int
wby_socket_recv(wby_socket socket, struct wby_buffer *buf, wby_log_f log)
{
    long err;
    int buf_left;
    for (;;) {
        buf_left = (int)buf->max - (int)buf->used;
        wby_dbg(log, "buffer space left = %d", buf_left);
        if (buf_left == 0)
            return WBY_FILL_FULL;

        /* Read what we can into the current buffer space. */
        err = recv(socket, (char*)buf->data + buf->used, (wby_size)buf_left, 0);
        if (err < 0) {
            int sock_err = wby_socket_error();
            if (wby_socket_is_blocking_error(sock_err)) {
                return WBY_FILL_OK;
            } else {
                /* Read error. Give up. */
                wby_dbg(log, "read error %d - connection dead", sock_err);
                return WBY_FILL_ERROR;
            }
        } else if (err == 0) {
          /* The peer has closed the connection. */
          wby_dbg(log, "peer has closed the connection");
          return WBY_FILL_ERROR;
        } else buf->used += (wby_size)err;
    }
}

WBY_INTERN int
wby_socket_flush(wby_socket socket, struct wby_buffer *buf)
{
    if (buf->used > 0){
        if (wby_socket_send(socket, buf->data, (int)buf->used) != WBY_OK)
            return 1;
    }
    buf->used = 0;
    return 0;
}

/* ---------------------------------------------------------------
 *                          URL
 * ---------------------------------------------------------------*/
/* URL-decode input buffer into destination buffer.
 * 0-terminate the destination buffer. Return the length of decoded data.
 * form-url-encoded data differs from URI encoding in a way that it
 * uses '+' as character for space, see RFC 1866 section 8.2.1
 * http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
 *
 * This bit of code was taken from mongoose.
 */
WBY_INTERN wby_size
wby_url_decode(const char *src, wby_size src_len, char *dst, wby_size dst_len,
    int is_form_url_encoded)
{
    int a, b;
    wby_size i, j;
    #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
    for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
        if (src[i] == '%' &&
            isxdigit(*(const wby_byte*)(src + i + 1)) &&
            isxdigit(*(const wby_byte*)(src + i + 2)))
        {
            a = tolower(*(const wby_byte*)(src + i + 1));
            b = tolower(*(const wby_byte*)(src + i + 2));
            dst[j] = (char)((HEXTOI(a) << 4) | HEXTOI(b));
            i += 2;
        } else if (is_form_url_encoded && src[i] == '+') {
            dst[j] = ' ';
        } else dst[j] = src[i];
    }
    #undef HEXTOI
    dst[j] = '\0'; /* Null-terminate the destination */
    return j;
}

/* Pulled from mongoose */
WBY_API int
wby_find_query_var(const char *buf, const char *name, char *dst, wby_size dst_len)
{
    const char *p, *e, *s;
    wby_size name_len;
    int len;
    wby_size buf_len = strlen(buf);

    name_len = strlen(name);
    e = buf + buf_len;
    len = -1;
    dst[0] = '\0';

    /* buf is "var1=val1&var2=val2...". Find variable first */
    for (p = buf; p != NULL && p + name_len < e; p++) {
        if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
            strncasecmp(name, p, name_len) == 0)
        {
            /* Point p to variable value */
            p += name_len + 1;
            /* Point s to the end of the value */
            s = (const char *) memchr(p, '&', (wby_size)(e - p));
            if (s == NULL) s = e;
            WBY_ASSERT(s >= p);
            /* Decode variable into destination buffer */
            if ((wby_size) (s - p) < dst_len)
                len = (int)wby_url_decode(p, (wby_size)(s - p), dst, dst_len, 1);
            break;
        }
    }
    return len;
}

/* ---------------------------------------------------------------
 *                          BASE64
 * ---------------------------------------------------------------*/
#define WBY_BASE64_QUADS_BEFORE_LINEBREAK 19

WBY_INTERN wby_size
wby_base64_bufsize(wby_size input_size)
{
    wby_size triplets = (input_size + 2) / 3;
    wby_size base_size = 4 * triplets;
    wby_size line_breaks = 2 * (triplets / WBY_BASE64_QUADS_BEFORE_LINEBREAK);
    wby_size null_termination = 1;
    return base_size + line_breaks + null_termination;
}

WBY_INTERN int
wby_base64_encode(char* output, wby_size output_size,
    const wby_byte *input, wby_size input_size)
{
    wby_size i = 0;
    int line_out = 0;
    WBY_STORAGE const char enc[] =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
        "abcdefghijklmnopqrstuvwxyz"
        "0123456789+/=";
    if (output_size < wby_base64_bufsize(input_size))
        return 1;

    while (i < input_size) {
        unsigned int idx_0, idx_1, idx_2, idx_3;
        unsigned int i0;

        i0 = (unsigned int)(input[i]) << 16; i++;
        i0 |= (unsigned int)(i < input_size ? input[i] : 0) << 8; i++;
        i0 |= (i < input_size ? input[i] : 0); i++;

        idx_0 = (i0 & 0xfc0000) >> 18; i0 <<= 6;
        idx_1 = (i0 & 0xfc0000) >> 18; i0 <<= 6;
        idx_2 = (i0 & 0xfc0000) >> 18; i0 <<= 6;
        idx_3 = (i0 & 0xfc0000) >> 18;

        if (i - 1 > input_size) idx_2 = 64;
        if (i > input_size) idx_3 = 64;

        *output++ = enc[idx_0];
        *output++ = enc[idx_1];
        *output++ = enc[idx_2];
        *output++ = enc[idx_3];

        if (++line_out == WBY_BASE64_QUADS_BEFORE_LINEBREAK) {
          *output++ = '\r';
          *output++ = '\n';
        }
    }
    *output = '\0';
    return 0;
}

/* ---------------------------------------------------------------
 *                          SHA1
 * ---------------------------------------------------------------*/
struct wby_sha1 {
    unsigned int state[5];
    unsigned int msg_size[2];
    wby_size buf_used;
    wby_byte buffer[64];
};

WBY_INTERN unsigned int
wby_sha1_rol(unsigned int value, unsigned int bits)
{
    return ((value) << bits) | (value >> (32 - bits));
}

WBY_INTERN void
wby_sha1_hash_block(unsigned int state[5], const wby_byte *block)
{
    int i;
    unsigned int a, b, c, d, e;
    unsigned int w[80];

    /* Prepare message schedule */
    for (i = 0; i < 16; ++i) {
        w[i] =  (((unsigned int)block[(i*4)+0]) << 24) |
                (((unsigned int)block[(i*4)+1]) << 16) |
                (((unsigned int)block[(i*4)+2]) <<  8) |
                (((unsigned int)block[(i*4)+3]) <<  0);
    }

    for (i = 16; i < 80; ++i)
        w[i] = wby_sha1_rol(w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16], 1);
    /* Initialize working variables */
    a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4];

    /* This is the core loop for each 20-word span. */
    #define SHA1_LOOP(start, end, func, constant) \
        for (i = (start); i < (end); ++i) { \
            unsigned int t = wby_sha1_rol(a, 5) + (func) + e + (constant) + w[i]; \
            e = d; d = c; c = wby_sha1_rol(b, 30); b = a; a = t;}

    SHA1_LOOP( 0, 20, ((b & c) ^ (~b & d)),           0x5a827999)
    SHA1_LOOP(20, 40, (b ^ c ^ d),                    0x6ed9eba1)
    SHA1_LOOP(40, 60, ((b & c) ^ (b & d) ^ (c & d)),  0x8f1bbcdc)
    SHA1_LOOP(60, 80, (b ^ c ^ d),                    0xca62c1d6)
    #undef SHA1_LOOP

    /* Update state */
    state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e;
}

WBY_INTERN void
wby_sha1_init(struct wby_sha1 *s)
{
    s->state[0] = 0x67452301;
    s->state[1] = 0xefcdab89;
    s->state[2] = 0x98badcfe;
    s->state[3] = 0x10325476;
    s->state[4] = 0xc3d2e1f0;

    s->msg_size[0] = 0;
    s->msg_size[1] = 0;
    s->buf_used = 0;
}

WBY_INTERN void
wby_sha1_update(struct wby_sha1 *s, const void *data_, wby_size size)
{
    const char *data = (const char*)data_;
    unsigned int size_lo;
    unsigned int size_lo_orig;
    wby_size remain = size;

    while (remain > 0) {
        wby_size buf_space = sizeof(s->buffer) - s->buf_used;
        wby_size copy_size = (remain < buf_space) ? remain : buf_space;
        memcpy(s->buffer + s->buf_used, data, copy_size);

        s->buf_used += copy_size;
        data += copy_size;
        remain -= copy_size;

        if (s->buf_used == sizeof(s->buffer)) {
            wby_sha1_hash_block(s->state, s->buffer);
            s->buf_used = 0;
        }
    }

    size_lo = size_lo_orig = s->msg_size[1];
    size_lo += (unsigned int)(size * 8);
    if (size_lo < size_lo_orig)
        s->msg_size[0] += 1;
    s->msg_size[1] = size_lo;
}

WBY_INTERN void
wby_sha1_final(wby_byte digest[20], struct wby_sha1 *s)
{
    wby_byte zero = 0x00;
    wby_byte one_bit = 0x80;
    wby_byte count_data[8];
    int i;

    /* Generate size data in bit endian format */
    for (i = 0; i < 8; ++i) {
        unsigned int word = s->msg_size[i >> 2];
        count_data[i] = (wby_byte)(word >> ((3 - (i & 3)) * 8));
    }

    /* Set trailing one-bit */
    wby_sha1_update(s, &one_bit, 1);
    /* Emit null padding to to make room for 64 bits of size info in the last 512 bit block */
    while (s->buf_used != 56)
        wby_sha1_update(s, &zero, 1);

    /* Write size in bits as last 64-bits */
    wby_sha1_update(s, count_data, 8);
    /* Make sure we actually finalized our last block */
    WBY_ASSERT(s->buf_used == 0);

    /* Generate digest */
    for (i = 0; i < 20; ++i) {
        unsigned int word = s->state[i >> 2];
        wby_byte byte = (wby_byte) ((word >> ((3 - (i & 3)) * 8)) & 0xff);
        digest[i] = byte;
    }
}

/* ---------------------------------------------------------------
 *                          CONNECTION
 * ---------------------------------------------------------------*/
#define WBY_WEBSOCKET_VERSION "13"
WBY_GLOBAL const char wby_continue_header[] = "HTTP/1.1 100 Continue\r\n\r\n";
WBY_GLOBAL const wby_size wby_continue_header_len = sizeof(wby_continue_header) - 1;
WBY_GLOBAL const char wby_websocket_guid[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
WBY_GLOBAL const wby_size wby_websocket_guid_len = sizeof(wby_websocket_guid) - 1;
WBY_GLOBAL const wby_byte wby_websocket_pong[] = { 0x80, WBY_WSOP_PONG, 0x00 };
WBY_GLOBAL const struct wby_header wby_plain_text_headers[]={{"Content-Type","text/plain"}};

enum wby_connection_flags {
    WBY_CON_FLAG_ALIVE                  = WBY_FLAG(0),
    WBY_CON_FLAG_FRESH_CONNECTION       = WBY_FLAG(1),
    WBY_CON_FLAG_CLOSE_AFTER_RESPONSE   = WBY_FLAG(2),
    WBY_CON_FLAG_CHUNKED_RESPONSE       = WBY_FLAG(3),
    WBY_CON_FLAG_WEBSOCKET              = WBY_FLAG(4)
};

enum wby_connection_state {
    WBY_CON_STATE_REQUEST,
    WBY_CON_STATE_SEND_CONTINUE,
    WBY_CON_STATE_SERVE,
    WBY_CON_STATE_WEBSOCKET
};

struct wby_connection {
    struct wby_con public_data;
    unsigned short flags;
    unsigned short state;

    wby_ptr socket;
    wby_log_f log;

    wby_size request_buffer_size;
    struct wby_buffer header_buf;
    struct wby_buffer io_buf;
    wby_size io_buffer_size;

    int header_body_left;
    int io_data_left;
    int continue_data_left;
    int body_bytes_read;

    struct wby_frame ws_frame;
    wby_byte ws_opcode;
    wby_size blocking_count;
};

WBY_INTERN int
wby_connection_set_blocking(struct wby_connection *conn)
{
    if (conn->blocking_count == 0) {
        if (wby_socket_set_blocking(WBY_SOCK(conn->socket), 1) != WBY_OK) {
            wby_dbg(conn->log, "failed to switch connection to blocking");
            conn->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return -1;
        }
    }
    ++conn->blocking_count;
    return 0;
}

WBY_INTERN int
wby_connection_set_nonblocking(struct wby_connection *conn)
{
    wby_size count = conn->blocking_count;
    if ((conn->flags & WBY_CON_FLAG_ALIVE) != 0 && count == 1) {
        if (wby_socket_set_blocking(WBY_SOCK(conn->socket), 0) != WBY_OK) {
            wby_dbg(conn->log, "failed to switch connection to non-blocking");
            conn->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return -1;
        }
    }
    conn->blocking_count = count - 1;
    return 0;
}

WBY_INTERN void
wby_connection_reset(struct wby_connection *conn, wby_size request_buffer_size,
    wby_size io_buffer_size)
{
    conn->header_buf.used = 0;
    conn->header_buf.max = request_buffer_size;
    conn->io_buf.used = 0;
    conn->io_buf.max = io_buffer_size;
    conn->header_body_left = 0;
    conn->io_data_left = 0;
    conn->continue_data_left = 0;
    conn->body_bytes_read = 0;
    conn->state = WBY_CON_STATE_REQUEST;
    conn->public_data.user_data = NULL;
    conn->blocking_count = 0;
}

WBY_INTERN void
wby_connection_close(struct wby_connection* connection)
{
    if (WBY_SOCK(connection->socket) != WBY_INVALID_SOCKET) {
        wby_socket_close(WBY_SOCK(connection->socket));
        connection->socket = (wby_ptr)WBY_INVALID_SOCKET;
    }
    connection->flags = 0;
}

WBY_INTERN int
wby_connection_setup_request(struct wby_connection *connection, int request_size)
{
    char* lines[WBY_MAX_HEADERS + 2];
    int line_count;
    char* tok[16];
    char* query_params;
    int tok_count;

    int i;
    int header_count;
    char *buf = (char*) connection->header_buf.data;
    struct wby_request *req = &connection->public_data.request;

    /* Null-terminate the request envelope by overwriting the last CRLF with 00LF */
    buf[request_size - 2] = '\0';
    /* Split header into lines */
    line_count = wby_tok_inplace(buf, "\r\n", lines, WBY_LEN(lines), 0);
    header_count = line_count - 2;
    if (line_count < 1 || header_count > (int) WBY_LEN(req->headers))
        return 1;

    /* Parse request line */
    tok_count = wby_tok_inplace(lines[0], " ", tok, WBY_LEN(tok), 0);
    if (3 != tok_count) return 1;

    req->method = tok[0];
    req->uri = tok[1];
    req->http_version = tok[2];
    req->content_length = 0;

    /* See if there are any query parameters */
    if ((query_params = (char*) strchr(req->uri, '?')) != NULL) {
        req->query_params = query_params + 1;
        *query_params = '\0';
    } else req->query_params = NULL;

    {
        /* Decode the URI in place */
        wby_size uri_len = strlen(req->uri);
        wby_url_decode(req->uri, uri_len, (char*)req->uri, uri_len + 1, 1);
    }

    /* Parse headers */
    for (i = 0; i < header_count; ++i) {
        tok_count = wby_tok_inplace(lines[i + 1], ":", tok, 2, WBY_TOK_SKIPWS);
        if (tok_count != 2) return 1;
        req->headers[i].name = tok[0];
        req->headers[i].value = tok[1];

        if (!strcasecmp("content-length", tok[0])) {
            req->content_length = (int)strtoul(tok[1], NULL, 10);
            wby_dbg(connection->log, "request has body; content length is %d", req->content_length);
        } else if (!strcasecmp("transfer-encoding", tok[0])) {
            wby_dbg(connection->log, "cowardly refusing to handle Transfer-Encoding: %s", tok[1]);
            return 1;
        }
    }
    req->header_count = header_count;
    return 0;
}

WBY_INTERN int
wby_connection_send_websocket_upgrade(struct wby_connection* connection)
{
    const char *hdr;
    struct wby_sha1 sha;
    wby_byte digest[20];
    char output_digest[64];
    struct wby_header headers[3];
    struct wby_con *conn = &connection->public_data;
    if ((hdr = wby_find_header(conn, "Sec-WebSocket-Version")) == NULL) {
        wby_dbg(connection->log, "Sec-WebSocket-Version header not present");
        return 1;
    }
    if (strcmp(hdr, WBY_WEBSOCKET_VERSION)) {
        wby_dbg(connection->log,"WebSocket version %s not supported (we only do %s)",
                hdr, WBY_WEBSOCKET_VERSION);
        return 1;
    }
    if ((hdr = wby_find_header(conn, "Sec-WebSocket-Key")) == NULL) {
        wby_dbg(connection->log, "Sec-WebSocket-Key header not present");
        return 1;
    }
    /* Compute SHA1 hash of Sec-Websocket-Key + the websocket guid as required by
    * the RFC.
    *
    * This handshake is bullshit. It adds zero security. Just forces me to drag
    * in SHA1 and create a base64 encoder.
    */
    wby_sha1_init(&sha);
    wby_sha1_update(&sha, hdr, strlen(hdr));
    wby_sha1_update(&sha, wby_websocket_guid, wby_websocket_guid_len);
    wby_sha1_final(&digest[0], &sha);
    if (wby_base64_encode(output_digest, sizeof output_digest, &digest[0], sizeof(digest)) != WBY_OK)
        return 1;

    headers[0].name  = "Upgrade";
    headers[0].value = "websocket";
    headers[1].name  = "Connection";
    headers[1].value = "Upgrade";
    headers[2].name  = "Sec-WebSocket-Accept";
    headers[2].value = output_digest;
    wby_response_begin(&connection->public_data, 101, 0, headers, WBY_LEN(headers));
    wby_response_end(&connection->public_data);
    return 0;
}

WBY_INTERN int
wby_connection_push(struct wby_connection *conn, const void *data_, int len)
{
    struct wby_buffer *buf = &conn->io_buf;
    const wby_byte* data = (const wby_byte*)data_;
    if (conn->state != WBY_CON_STATE_SERVE) {
        wby_dbg(conn->log, "attempt to write in non-serve state");
        return 1;
    }
    if (len == 0)
        return wby_socket_flush(WBY_SOCK(conn->socket), buf);

    while (len > 0) {
        int buf_space = (int)buf->max - (int)buf->used;
        int copy_size = len < buf_space ? len : buf_space;
        memcpy(buf->data + buf->used, data, (wby_size)copy_size);
        buf->used += (wby_size)copy_size;

        data += copy_size;
        len -= copy_size;
        if (buf->used == buf->max) {
            if (wby_socket_flush(WBY_SOCK(conn->socket), buf) != WBY_OK)
                return 1;
            if ((wby_size)len >= buf->max)
                return wby_socket_send(WBY_SOCK(conn->socket), data, len);
        }
    }
    return 0;
}

/* ---------------------------------------------------------------
 *                          CON/REQUEST
 * ---------------------------------------------------------------*/
WBY_INTERN int
wby_con_discard_incoming_data(struct wby_con* conn, int count)
{
    while (count > 0) {
        char buffer[1024];
        int read_size = (int)(((wby_size)count > sizeof(buffer)) ?
            sizeof(buffer) : (wby_size)count);
        if (wby_read(conn, buffer, (wby_size)read_size) != WBY_OK)
            return -1;
        count -= read_size;
    }
    return 0;
}

WBY_API const char*
wby_find_header(struct wby_con *conn, const char *name)
{
    int i, count;
    for (i = 0, count = conn->request.header_count; i < count; ++i) {
        if (!strcasecmp(conn->request.headers[i].name, name))
            return conn->request.headers[i].value;
    }
    return NULL;
}

WBY_INTERN int
wby_con_is_websocket_request(struct wby_con* conn)
{
    const char *hdr;
    if ((hdr = wby_find_header(conn, "Connection")) == NULL) return 0;
    if (strcasecmp(hdr, "Upgrade")) return 0;
    if ((hdr = wby_find_header(conn, "Upgrade")) == NULL) return 0;
    if (strcasecmp(hdr, "websocket")) return 0;
    return 1;
}

WBY_INTERN int
wby_scan_websocket_frame(struct wby_frame *frame, const struct wby_buffer *buf)
{
    wby_byte flags = 0;
    unsigned int len = 0;
    unsigned int opcode = 0;
    wby_byte* data = buf->data;
    wby_byte* data_max = data + buf->used;

    int i;
    int len_bytes = 0;
    int mask_bytes = 0;
    wby_byte header0, header1;
    if (buf->used < 2)
        return -1;

    header0 = *data++;
    header1 = *data++;
    if (header0 & 0x80)
        flags |= WBY_WSF_FIN;
    if (header1 & 0x80) {
        flags |= WBY_WSF_MASKED;
        mask_bytes = 4;
    }

    opcode = header0 & 0xf;
    len = header1 & 0x7f;
    if (len == 126)
        len_bytes = 2;
    else if (len == 127)
        len_bytes = 8;
    if (data + len_bytes + mask_bytes > data_max)
        return -1;

    /* Read big endian length from length bytes (if greater than 125) */
    len = len_bytes == 0 ? len : 0;
    for (i = 0; i < len_bytes; ++i) {
        /* This will totally overflow for 64-bit values. I don't care.
         * If you're transmitting more than 4 GB of data using Webby,
         * seek help. */
        len <<= 8;
        len |= *data++;
    }

    /* Read mask word if present */
    for (i = 0; i < mask_bytes; ++i)
        frame->mask_key[i] = *data++;
    frame->header_size = (wby_byte) (data - buf->data);
    frame->flags = flags;
    frame->opcode = (wby_byte) opcode;
    frame->payload_length = (int)len;
    return 0;
}

WBY_API int
wby_frame_begin(struct wby_con *conn_pub, int opcode)
{
    struct wby_connection *conn = (struct wby_connection*)conn_pub;
    conn->ws_opcode = (wby_byte) opcode;
    /* Switch socket to blocking mode */
    return wby_connection_set_blocking(conn);
}

WBY_API int
wby_frame_end(struct wby_con *conn_pub)
{
    wby_byte header[10];
    wby_size header_size;
    struct wby_connection *conn = (struct wby_connection*) conn_pub;
    header_size = wby_make_websocket_header(header, conn->ws_opcode, 0, 1);
    if (wby_socket_send(WBY_SOCK(conn->socket), header, (int) header_size) != WBY_OK)
        conn->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
    /* Switch socket to non-blocking mode */
    return wby_connection_set_nonblocking(conn);
}

WBY_API int
wby_read(struct wby_con *conn, void *ptr_, wby_size len)
{
    struct wby_connection* conn_prv = (struct wby_connection*)conn;
    char *ptr = (char*) ptr_;
    int count;

    int start_pos = conn_prv->body_bytes_read;
    if (conn_prv->header_body_left > 0) {
        count = wby_read_buffered_data(&conn_prv->header_body_left, &conn_prv->header_buf, &ptr, &len);
        conn_prv->body_bytes_read += count;
    }

    /* Read buffered websocket data */
    if (conn_prv->io_data_left > 0) {
        count = wby_read_buffered_data(&conn_prv->io_data_left, &conn_prv->io_buf, &ptr, &len);
        conn_prv->body_bytes_read += count;
    }

    while (len > 0) {
        long err = recv(WBY_SOCK(conn_prv->socket), ptr, (wby_size)len, 0);
        if (err < 0) {
            conn_prv->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return (int)err;
        }
        len -= (wby_size)err;
        ptr += (wby_size)err;
        conn_prv->body_bytes_read += (int)err;
    }

    if ((conn_prv->flags & WBY_CON_FLAG_WEBSOCKET) && (conn_prv->ws_frame.flags & WBY_WSF_MASKED)) {
        /* XOR outgoing data with websocket ofuscation key */
        int i, end_pos = conn_prv->body_bytes_read;
        const wby_byte *mask = conn_prv->ws_frame.mask_key;
        ptr = (char*) ptr_; /* start over */
        for (i = start_pos; i < end_pos; ++i) {
            wby_byte byte = (wby_byte)*ptr;
            *ptr++ = (char)(byte ^ mask[i & 3]);
        }
    }
    return 0;
}

WBY_API int
wby_write(struct wby_con *conn, const void *ptr, wby_size len)
{
    struct wby_connection *conn_priv = (struct wby_connection*) conn;
    if (conn_priv->flags & WBY_CON_FLAG_WEBSOCKET) {
        wby_byte header[10];
        wby_size header_size;
        header_size = wby_make_websocket_header(header, conn_priv->ws_opcode, (int)len, 0);

        /* Overwrite opcode to be continuation packages from here on out */
        conn_priv->ws_opcode = WBY_WSOP_CONTINUATION;
        if (wby_socket_send(WBY_SOCK(conn_priv->socket), header, (int)header_size) != WBY_OK) {
            conn_priv->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return -1;
        }
        if (wby_socket_send(WBY_SOCK(conn_priv->socket),(const wby_byte*)ptr, (int)len) != WBY_OK) {
            conn_priv->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return -1;
        }
        return 0;
    } else if (conn_priv->flags & WBY_CON_FLAG_CHUNKED_RESPONSE) {
        char chunk_header[128];
        int header_len = snprintf(chunk_header, sizeof chunk_header, "%x\r\n", (int) len);
        wby_connection_push(conn_priv, chunk_header, header_len);
        wby_connection_push(conn_priv, ptr, (int)len);
        return wby_connection_push(conn_priv, "\r\n", 2);
    } else return wby_connection_push(conn_priv, ptr, (int) len);
}

WBY_INTERN int
wby_printf(struct wby_con* conn, const char* fmt, ...)
{
    int len;
    char buffer[1024];
    va_list args;
    va_start(args, fmt);
    len = vsnprintf(buffer, sizeof buffer, fmt, args);
    va_end(args);
    return wby_write(conn, buffer, (wby_size)len);
}

/* ---------------------------------------------------------------
 *                          RESPONSE
 * ---------------------------------------------------------------*/
#define WBY_STATUS_MAP(STATUS)\
    STATUS(100, "Continue")\
    STATUS(101, "Switching Protocols")\
    STATUS(200, "OK")\
    STATUS(201, "Created")\
    STATUS(202, "Accepted")\
    STATUS(203, "Non-Authoritative Information")\
    STATUS(204, "No Content")\
    STATUS(205, "Reset Content")\
    STATUS(206, "Partial Content")\
    STATUS(300, "Multiple Choices")\
    STATUS(301, "Moved Permanently")\
    STATUS(302, "Found")\
    STATUS(303, "See Other")\
    STATUS(304, "Not Modified")\
    STATUS(305, "Use Proxy")\
    STATUS(307, "Temporary Redirect")\
    STATUS(400, "Bad Request")\
    STATUS(401, "Unauthorized")\
    STATUS(402, "Payment Required")\
    STATUS(403, "Forbidden")\
    STATUS(404, "Not Found")\
    STATUS(405, "Method Not Allowed")\
    STATUS(406, "Not Acceptable")\
    STATUS(407, "Proxy Authentication Required")\
    STATUS(408, "Request Time-out")\
    STATUS(409, "Conflict")\
    STATUS(410, "Gone")\
    STATUS(411, "Length Required")\
    STATUS(412, "Precondition Failed")\
    STATUS(413, "Request Entity Too Large")\
    STATUS(414, "Request-URI Too Large")\
    STATUS(415, "Unsupported Media Type")\
    STATUS(416, "Requested range not satisfiable")\
    STATUS(417, "Expectation Failed")\
    STATUS(500, "Internal Server Error")\
    STATUS(501, "Not Implemented")\
    STATUS(502, "Bad Gateway")\
    STATUS(503, "Service Unavailable")\
    STATUS(504, "Gateway Time-out")\
    STATUS(505, "HTTP Version not supported")

WBY_GLOBAL const short wby_status_nums[] = {
#define WBY_STATUS(id, name) id,
    WBY_STATUS_MAP(WBY_STATUS)
#undef WBY_STATUS
};
WBY_GLOBAL const char* wby_status_text[] = {
#define WBY_STATUS(id, name) name,
    WBY_STATUS_MAP(WBY_STATUS)
#undef WBY_STATUS
};

WBY_INTERN const char*
wby_response_status_text(int status_code)
{
    int i;
    for (i = 0; i < (int) WBY_LEN(wby_status_nums); ++i) {
        if (wby_status_nums[i] == status_code)
            return wby_status_text[i];
    }
    return "Unknown";
}

WBY_API int
wby_response_begin(struct wby_con *conn_pub, int status_code, int content_length,
    const struct wby_header *headers, int header_count)
{
    int i = 0;
    struct wby_connection *conn = (struct wby_connection *)conn_pub;
    if (conn->body_bytes_read < (int)conn->public_data.request.content_length) {
        int body_left = conn->public_data.request.content_length - (int)conn->body_bytes_read;
        if (wby_con_discard_incoming_data(conn_pub, body_left) != WBY_OK) {
            conn->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
            return -1;
        }
    }

    wby_printf(conn_pub, "HTTP/1.1 %d %s\r\n", status_code, wby_response_status_text(status_code));
    if (content_length >= 0)
        wby_printf(conn_pub, "Content-Length: %d\r\n", content_length);
    else wby_printf(conn_pub, "Transfer-Encoding: chunked\r\n");
    wby_printf(conn_pub, "Server: wby\r\n");

    for (i = 0; i < header_count; ++i) {
        if (!strcasecmp(headers[i].name, "Connection")) {
            if (!strcasecmp(headers[i].value, "close"))
            conn->flags |= WBY_CON_FLAG_CLOSE_AFTER_RESPONSE;
        }
        wby_printf(conn_pub, "%s: %s\r\n", headers[i].name, headers[i].value);
    }

    if (!(conn->flags & WBY_CON_FLAG_CLOSE_AFTER_RESPONSE)) {
        /* See if the client wants us to close the connection. */
        const char* connection_header = wby_find_header(conn_pub, "Connection");
        if (connection_header && !strcasecmp("close", connection_header)) {
            conn->flags |= WBY_CON_FLAG_CLOSE_AFTER_RESPONSE;
            wby_printf(conn_pub, "Connection: close\r\n");
        }
    }
    wby_printf(conn_pub, "\r\n");
    if (content_length < 0)
        conn->flags |= WBY_CON_FLAG_CHUNKED_RESPONSE;
    return 0;
}

WBY_API void
wby_response_end(struct wby_con *conn)
{
    struct wby_connection *conn_priv = (struct wby_connection*) conn;
    if (conn_priv->flags & WBY_CON_FLAG_CHUNKED_RESPONSE) {
        /* Write final chunk */
        wby_connection_push(conn_priv, "0\r\n\r\n", 5);
        conn_priv->flags &= (unsigned short)~WBY_CON_FLAG_CHUNKED_RESPONSE;
    }
    /* Flush buffers */
    wby_connection_push(conn_priv, "", 0);

    /* Close connection when Content-Length is zero that maybe HTTP/1.0. */
    if (conn->request.content_length == 0 && !wby_con_is_websocket_request(conn))
        wby_connection_close(conn_priv);
}

/* ---------------------------------------------------------------
 *                          SERVER
 * ---------------------------------------------------------------*/
/* Pointer to Integer type conversion for pointer alignment */
#if defined(__PTRDIFF_TYPE__) /* This case should work for GCC*/
# define WBY_UINT_TO_PTR(x) ((void*)(__PTRDIFF_TYPE__)(x))
# define WBY_PTR_TO_UINT(x) ((wby_size)(__PTRDIFF_TYPE__)(x))
#elif !defined(__GNUC__) /* works for compilers other than LLVM */
# define WBY_UINT_TO_PTR(x) ((void*)&((char*)0)[x])
# define WBY_PTR_TO_UINT(x) ((wby_size)(((char*)x)-(char*)0))
#elif defined(WBY_USE_FIXED_TYPES) /* used if we have <stdint.h> */
# define WBY_UINT_TO_PTR(x) ((void*)(uintptr_t)(x))
# define WBY_PTR_TO_UINT(x) ((uintptr_t)(x))
#else /* generates warning but works */
# define WBY_UINT_TO_PTR(x) ((void*)(x))
# define WBY_PTR_TO_UINT(x) ((wby_size)(x))
#endif

/* simple pointer math */
#define WBY_PTR_ADD(t, p, i) ((t*)((void*)((wby_byte*)(p) + (i))))
#define WBY_ALIGN_PTR(x, mask)\
    (WBY_UINT_TO_PTR((WBY_PTR_TO_UINT((wby_byte*)(x) + (mask-1)) & ~(mask-1))))

/* pointer alignment  */
#ifdef __cplusplus
template<typename T> struct wby_alignof;
template<typename T, int size_diff> struct wby_helper{enum {value = size_diff};};
template<typename T> struct wby_helper<T,0>{enum {value = wby_alignof<T>::value};};
template<typename T> struct wby_alignof{struct Big {T x; char c;}; enum {
    diff = sizeof(Big) - sizeof(T), value = wby_helper<Big, diff>::value};};
#define WBY_ALIGNOF(t) (wby_alignof<t>::value);
#else
#define WBY_ALIGNOF(t) ((char*)(&((struct {char c; t _h;}*)0)->_h) - (char*)0)
#endif

WBY_API void
wby_init(struct wby_server *srv, const struct wby_config *cfg, wby_size *needed_memory)
{
    WBY_STORAGE const wby_size wby_conn_align = WBY_ALIGNOF(struct wby_connection);
    WBY_ASSERT(srv);
    WBY_ASSERT(cfg);
    WBY_ASSERT(needed_memory);

    memset(srv, 0, sizeof(*srv));
    srv->config = *cfg;
    WBY_ASSERT(cfg->dispatch);

    *needed_memory = 0;
    *needed_memory += cfg->connection_max * sizeof(struct wby_connection);
    *needed_memory += cfg->connection_max * cfg->request_buffer_size;
    *needed_memory += cfg->connection_max * cfg->io_buffer_size;
    *needed_memory += wby_conn_align;
    srv->memory_size = *needed_memory;
}

WBY_API int
wby_start(struct wby_server *server, void *memory)
{
    wby_size i;
    wby_socket sock;
    wby_sockopt on = 1;
    wby_byte *buffer = (wby_byte*)memory;
    struct sockaddr_in bind_addr;
    WBY_STORAGE const wby_size wby_conn_align = WBY_ALIGNOF(struct wby_connection);

    WBY_ASSERT(server);
    WBY_ASSERT(memory);
    memset(buffer, 0, server->memory_size);

    /* setup sever memory */
    server->socket = (wby_ptr)WBY_INVALID_SOCKET;
    server->con = (struct wby_connection*)WBY_ALIGN_PTR(buffer, wby_conn_align);
    buffer += ((wby_byte*)server->con - buffer);
    buffer += server->config.connection_max * sizeof(struct wby_connection);

    for (i = 0; i < server->config.connection_max; ++i) {
        server->con[i].log = server->config.log;
        server->con[i].header_buf.data = buffer;
        buffer += server->config.request_buffer_size;
        server->con[i].io_buf.data = buffer;
        server->con[i].request_buffer_size = server->config.request_buffer_size;
        server->con[i].io_buffer_size = server->config.io_buffer_size;
        buffer += server->config.io_buffer_size;
    }
    WBY_ASSERT((wby_size)(buffer - (wby_byte*)memory) <= server->memory_size);

    /* server socket setup */
    sock = (wby_ptr)socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
#ifdef _WIN32
    if (sock == INVALID_SOCKET && WSAGetLastError() == WSANOTINITIALISED) {
        /* Make sure WSAStartup has been called. */
        wby_dbg(server->config.log, "Calling WSAStartup.");
        WSADATA wsaData;
        WSAStartup(MAKEWORD(2, 2), &wsaData);
        sock = (wby_ptr)socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        server->windows_socket_initialized = 1;
    }
#endif
    wby_dbg(server->config.log, "Server socket = %d", (int)sock);
    if (!wby_socket_is_valid(sock)) {
        wby_dbg(server->config.log, "failed to initialized server socket: %d", wby_socket_error());
        goto error;
    }

    setsockopt(WBY_SOCK(sock), SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
    #ifdef __APPLE__ /* Don't generate SIGPIPE when writing to dead socket, we check all writes. */
    signal(SIGPIPE, SIG_IGN);
    #endif
    if (wby_socket_set_blocking(sock, 0) != WBY_OK) goto error;

    /* bind server socket */
    wby_dbg(server->config.log, "binding to %s:%d", server->config.address, server->config.port);
    memset(&bind_addr, 0, sizeof(bind_addr));
    bind_addr.sin_family = AF_INET;
    bind_addr.sin_port = htons((unsigned short)server->config.port);
    bind_addr.sin_addr.s_addr = inet_addr(server->config.address);
    if (bind(sock, (struct sockaddr*) &bind_addr, sizeof(bind_addr)) != WBY_OK) {
        wby_dbg(server->config.log, "bind() failed: %d", wby_socket_error());
        wby_dbg(server->config.log, "bind() failed: %s", strerror(wby_socket_error()));
        goto error;
    }

    /* set server socket to listening */
    if (listen(sock, SOMAXCONN) != WBY_OK) {
        wby_dbg(server->config.log, "listen() failed: %d", wby_socket_error());
        wby_socket_close(WBY_SOCK(sock));
        goto error;
    }
    server->socket = (wby_ptr)sock;
    wby_dbg(server->config.log, "server initialized: %s", strerror(errno));
    return 0;

error:
    if (wby_socket_is_valid(WBY_SOCK(sock)))
        wby_socket_close(WBY_SOCK(sock));
    return -1;
}

WBY_API void
wby_stop(struct wby_server *srv)
{
#ifdef _WIN32
    if (srv->windows_socket_initialized) {
        WSACleanup();
    }
#endif
    wby_size i;
    wby_socket_close(WBY_SOCK(srv->socket));
    for (i = 0; i < srv->con_count; ++i)
        wby_socket_close(WBY_SOCK(srv->con[i].socket));
}

WBY_INTERN int
wby_on_incoming(struct wby_server *srv)
{
    wby_size connection_index;
    char WBY_ALIGN(8) client_addr[64];
    struct wby_connection* connection;
    wby_socklen client_addr_len = sizeof(client_addr);
    wby_socket fd;

    /* Make sure we have space for a new connection */
    connection_index = srv->con_count;
    if (connection_index == srv->config.connection_max) {
        wby_dbg(srv->config.log, "out of connection slots");
        return 1;
    }

    /* Accept the incoming connection. */
    fd = accept(WBY_SOCK(srv->socket), (struct sockaddr*)&client_addr[0], &client_addr_len);
    if (!wby_socket_is_valid(fd)) {
        int err = wby_socket_error();
        if (!wby_socket_is_blocking_error(err))
            wby_dbg(srv->config.log, "accept() failed: %d", err);
        return 1;
    }

    connection = &srv->con[connection_index];
    wby_connection_reset(connection, srv->config.request_buffer_size, srv->config.io_buffer_size);
    connection->flags = WBY_CON_FLAG_FRESH_CONNECTION;
    srv->con_count = connection_index + 1;

    /* Configure socket */
    if (wby_socket_config_incoming(fd) != WBY_OK) {
        wby_socket_close(fd);
        return 1;
    }

    /* OK, keep this connection */
    wby_dbg(srv->config.log, "tagging connection %d as alive", connection_index);
    connection->flags |= WBY_CON_FLAG_ALIVE;
    connection->socket = (wby_ptr)fd;
    return 0;
}

WBY_INTERN void
wby_update_connection(struct wby_server *srv, struct wby_connection* connection)
{
    /* This is no longer a fresh connection. Only read from it when select() says
    * so in the future. */
    connection->flags &= (unsigned short)~WBY_CON_FLAG_FRESH_CONNECTION;
    for (;;)
    {
        switch (connection->state) {
        default: break;
        case WBY_CON_STATE_REQUEST: {
            const char *expect_header;
            int request_size;
            int result = wby_socket_recv(WBY_SOCK(connection->socket),
                &connection->header_buf, srv->config.log);
            if (WBY_FILL_ERROR == result) {
                connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                return;
            }

            /* Scan to see if the buffer has a complete HTTP request header package. */
            request_size = wb_peek_request_size(connection->header_buf.data,
                (int)connection->header_buf.used);
            if (request_size < 0) {
                /* Nothing yet. */
                if (connection->header_buf.max == connection->header_buf.used) {
                    wby_dbg(srv->config.log, "giving up as buffer is full");
                    /* Give up, we can't fit the request in our buffer. */
                    connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                }
                return;
            }
            wby_dbg(srv->config.log, "peek request size: %d", request_size);


            /* Set up request data. */
            if (wby_connection_setup_request(connection, request_size) != WBY_OK) {
                wby_dbg(srv->config.log, "failed to set up request");
                connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                return;
            }

            /* Remember how much of the remaining buffer is body data. */
            connection->header_body_left = (int)connection->header_buf.used - request_size;
            /* If the client expects a 100 Continue, send one now. */
            if (NULL != (expect_header = wby_find_header(&connection->public_data, "Expect"))) {
                if (!strcasecmp(expect_header, "100-continue")) {
                    wby_dbg(srv->config.log, "connection expects a 100 Continue header.. making him happy");
                    connection->continue_data_left = (int)wby_continue_header_len;
                    connection->state = WBY_CON_STATE_SEND_CONTINUE;
                } else {
                    wby_dbg(srv->config.log, "unrecognized Expected header %s", expect_header);
                    connection->state = WBY_CON_STATE_SERVE;
                }
            } else connection->state = WBY_CON_STATE_SERVE;
        } break; /* WBY_REQUEST */

        case WBY_CON_STATE_SEND_CONTINUE: {
            int left = connection->continue_data_left;
            int offset = (int)wby_continue_header_len - left;
            long written = 0;

            written = send(WBY_SOCK(connection->socket), wby_continue_header + offset, (wby_size)left, 0);
            wby_dbg(srv->config.log, "continue write: %d bytes", written);
            if (written < 0) {
                wby_dbg(srv->config.log, "failed to write 100-continue header");
                connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                return;
            }
            left -= (int)written;
            connection->continue_data_left = left;
            if (left == 0)
                connection->state = WBY_CON_STATE_SERVE;
        } break; /* WBY_SEND_cONTINUE */

        case WBY_CON_STATE_SERVE: {
            /* Clear I/O buffer for output */
            connection->io_buf.used = 0;
            /* Switch socket to blocking mode. */
            if (wby_connection_set_blocking(connection) != WBY_OK)
                return;

            /* Figure out if this is a request to upgrade to WebSockets */
            if (wby_con_is_websocket_request(&connection->public_data)) {
                wby_dbg(srv->config.log, "received a websocket upgrade request");
                if (!srv->config.ws_connect ||
                    srv->config.ws_connect(&connection->public_data, srv->config.userdata) != WBY_OK)
                {
                    wby_dbg(srv->config.log, "user callback failed connection attempt");
                    wby_response_begin(&connection->public_data, 400, -1,
                        wby_plain_text_headers, WBY_LEN(wby_plain_text_headers));
                    wby_printf(&connection->public_data, "WebSockets not supported at %s\r\n",
                        connection->public_data.request.uri);
                    wby_response_end(&connection->public_data);
                } else {
                    /* OK, let's try to upgrade the connection to WebSockets */
                    if (wby_connection_send_websocket_upgrade(connection) != WBY_OK) {
                        wby_dbg(srv->config.log, "websocket upgrade failed");
                        wby_response_begin(&connection->public_data, 400, -1,
                            wby_plain_text_headers, WBY_LEN(wby_plain_text_headers));
                        wby_printf(&connection->public_data, "WebSockets couldn't not be enabled\r\n");
                        wby_response_end(&connection->public_data);
                    } else {
                        /* OK, we're now a websocket */
                        connection->flags |= WBY_CON_FLAG_WEBSOCKET;
                        wby_dbg(srv->config.log, "connection %d upgraded to websocket",
                            (int)(connection - srv->con));
                        srv->config.ws_connected(&connection->public_data, srv->config.userdata);
                    }
                }
            } else if (srv->config.dispatch(&connection->public_data, srv->config.userdata) != 0) {
                static const struct wby_header headers[] = {{ "Content-Type", "text/plain" }};
                wby_response_begin(&connection->public_data, 404, -1, headers, WBY_LEN(headers));
                wby_printf(&connection->public_data, "No handler for %s\r\n",
                    connection->public_data.request.uri);
                wby_response_end(&connection->public_data);
            }

            /* Back to non-blocking mode, can make the socket die. */
            wby_connection_set_nonblocking(connection);
            /* Ready for another request, unless we should close the connection. */
            if (connection->flags & WBY_CON_FLAG_ALIVE) {
                if (connection->flags & WBY_CON_FLAG_CLOSE_AFTER_RESPONSE) {
                    connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                    return;
                } else {
                    /* Reset connection for next request. */
                    wby_connection_reset(connection, srv->config.request_buffer_size,
                        srv->config.io_buffer_size);
                    if (!(connection->flags & WBY_CON_FLAG_WEBSOCKET)) {
                        /* Loop back to request state */
                        connection->state = WBY_CON_STATE_REQUEST;
                    } else {
                        /* Clear I/O buffer for input */
                        connection->io_buf.used = 0;
                        /* Go to the web socket serving state */
                        connection->state = WBY_CON_STATE_WEBSOCKET;
                    }
                }
            }
        } break; /* WBY_SERVE */

        case WBY_CON_STATE_WEBSOCKET: {
            /* In this state, we're trying to read a websocket frame into the I/O
            * buffer. Once we have enough data, we call the websocket frame
            * callback and let the client read the data through WebbyRead. */
            if (WBY_FILL_ERROR == wby_socket_recv(WBY_SOCK(connection->socket),
                &connection->io_buf, srv->config.log)) {
                /* Give up on this connection */
                connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                return;
            }

            if (wby_scan_websocket_frame(&connection->ws_frame, &connection->io_buf) != WBY_OK)
                return;

            connection->body_bytes_read = 0;
            connection->io_data_left = (int)connection->io_buf.used - connection->ws_frame.header_size;
            wby_dbg(srv->config.log, "%d bytes of incoming websocket data buffered",
                (int)connection->io_data_left);

            /* Switch socket to blocking mode */
            if (wby_connection_set_blocking(connection) != WBY_OK)
                return;

            switch (connection->ws_frame.opcode)
            {
            case WBY_WSOP_CLOSE:
                wby_dbg(srv->config.log, "received websocket close request");
                connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                return;

              case WBY_WSOP_PING:
                wby_dbg(srv->config.log, "received websocket ping request");
                if (wby_socket_send(WBY_SOCK(connection->socket), wby_websocket_pong,
                    sizeof wby_websocket_pong)){
                    connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                    return;
                }
                break;

              default:
                /* Dispatch frame to user handler. */
                if (srv->config.ws_frame(&connection->public_data,
                    &connection->ws_frame, srv->config.userdata) != WBY_OK) {
                  connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                  return;
                }
            }

            /* Discard any data the client didn't read to retain the socket state. */
            if (connection->body_bytes_read < connection->ws_frame.payload_length) {
                int size = connection->ws_frame.payload_length - connection->body_bytes_read;
                if (wby_con_discard_incoming_data(&connection->public_data, size) != WBY_OK) {
                    connection->flags &= (unsigned short)~WBY_CON_FLAG_ALIVE;
                    return;
                }
            }

            /* Back to non-blocking mode */
            if (wby_connection_set_nonblocking(connection) != WBY_OK)
                return;

            wby_connection_reset(connection, srv->config.request_buffer_size, srv->config.io_buffer_size);
            connection->state = WBY_CON_STATE_WEBSOCKET;
        } break; /* WBY_WEBSOCKET */
        } /* switch */
    } /* for */
}

WBY_API void
wby_update(struct wby_server *srv)
{
    int err;
    wby_size i, count;
    wby_socket max_socket;
    fd_set read_fds, write_fds, except_fds;
    struct timeval timeout;

    /* Build set of sockets to check for events */
    FD_ZERO(&read_fds);
    FD_ZERO(&write_fds);
    FD_ZERO(&except_fds);
    max_socket = 0;

    /* Only accept incoming connections if we have space */
    if (srv->con_count < srv->config.connection_max) {
        FD_SET(srv->socket, &read_fds);
        FD_SET(srv->socket, &except_fds);
        max_socket = WBY_SOCK(srv->socket);
    }

    for (i = 0, count = srv->con_count; i < count; ++i) {
        wby_socket socket = WBY_SOCK(srv->con[i].socket);
        FD_SET(socket, &read_fds);
        FD_SET(socket, &except_fds);
        if (srv->con[i].state == WBY_CON_STATE_SEND_CONTINUE)
            FD_SET(socket, &write_fds);
        if (socket > max_socket)
            max_socket = socket;
    }

    timeout.tv_sec = 0;
    timeout.tv_usec = 5;
    err = select((int)(max_socket + 1), &read_fds, &write_fds, &except_fds, &timeout);
    if (err < 0) {
        wby_dbg(srv->config.log, "failed to select");
        return;
    }

    /* Handle incoming connections */
    if (FD_ISSET(WBY_SOCK(srv->socket), &read_fds)) {
        do {
            wby_dbg(srv->config.log, "awake on incoming");
            err = wby_on_incoming(srv);
        } while (err == 0);
    }

    /* Handle incoming connection data */
    for (i = 0, count = srv->con_count; i < count; ++i) {
        struct wby_connection *conn = &srv->con[i];
        if (FD_ISSET(WBY_SOCK(conn->socket), &read_fds) ||
            FD_ISSET(WBY_SOCK(conn->socket), &write_fds) ||
            conn->flags & WBY_CON_FLAG_FRESH_CONNECTION)
        {
            wby_dbg(srv->config.log, "reading from connection %d", i);
            wby_update_connection(srv, conn);
        }
    }

    /* Close stale connections & compact connection array. */
    for (i = 0; i < srv->con_count; ) {
        struct wby_connection *connection = &srv->con[i];
        if (!(connection->flags & WBY_CON_FLAG_ALIVE)) {
            wby_size remain;
            wby_dbg(srv->config.log, "closing connection %d (%08x)", i, connection->flags);
            if (connection->flags & WBY_CON_FLAG_WEBSOCKET)
                srv->config.ws_closed(&connection->public_data, srv->config.userdata);
            remain = srv->con_count - (wby_size)i - 1;
            wby_connection_close(connection);
            memmove(&srv->con[i], &srv->con[i + 1], remain*sizeof(srv->con[i]));
            --srv->con_count;
        } else ++i;
    }
}

#endif /* WBY_IMPLEMENTATION */

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

                    Version 2, December 2004






 Copyright (C) 2017, 2018 Cthulhux <git_at_tuxproject.de>





















































































































































































 Everyone is permitted to copy and distribute verbatim or modified














 copies of this license document, and changing it is allowed as long

 as the name is changed.





















































































            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION


















  0. You just DO WHAT THE FUCK YOU WANT TO.

* Open Source: Trust nobody (including me)!
* Backups: `ymarks` will clone your latest two databases in case you fucked it up.

## Requirements

### Server

You'll need a decent C compiler and the `sqlite3` libraries.

    cc -I . -I /usr/local/include -o ymarks 3rdparty/cJSON.c src/backup.c src/main.c -lsqlite3

Your exact compiler command could vary, depending on your library and include paths.

See the `build.cmd` file for a clue about how to compile with Clang on Windows.

#### Preprocessor definitions

* Define `SILENT` if you want the server to shut the fuck up while running, otherwise `ymarks` will log incoming requests to `stdout`.
* Define `NO_BACKUP` if you do not want `ymarks` to automatically create backup files.
* *Windows-only:*
 * Define `KEEP_VISIBLE` if you do not want to hide the server window after the start. (By default, it'll disappear after a successful start.)

## TODO

* Support synchronization of bookmark tags. There does not seem to be a WebExtensions API for that yet.

## Licenses

The server part of `ymarks` comes with a number of third-party libraries (see `/server/3rdparty`), licensed under the terms of the BSD resp. MIT licenses. Everything else in this repository is original work, licensed under the terms of the *WTFPL* license. Please refer to the `server/COPYING` file for details. Feel free to do whatever you want with it.

@echo off
if not exist build mkdir build
rem bake sqlite3 right into the exe because why would we want to waste space for DLLs?
clang -Weverything --std=c11 src/main.c src/backup.c 3rdparty/cJSON.c sqlite3/sqlite-snapshot-201709211311/sqlite3.c -o build/ymarks.exe -static -I. -Isqlite3/sqlite-snapshot-201709211311

Installation Instructions
*************************

Copyright (C) 1994-1996, 1999-2002, 2004-2011 Free Software Foundation,
Inc.

   Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.  This file is offered as-is,
without warranty of any kind.

Basic Installation
==================

   Briefly, the shell commands `./configure; make; make install' should
configure, build, and install this package.  The following
more-detailed instructions are generic; see the `README' file for
instructions specific to this package.  Some packages provide this
`INSTALL' file but do not implement all of the features documented
below.  The lack of an optional feature in a given package is not
necessarily a bug.  More recommendations for GNU packages can be found
in *note Makefile Conventions: (standards)Makefile Conventions.

   The `configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation.  It uses
those values to create a `Makefile' in each directory of the package.
It may also create one or more `.h' files containing system-dependent
definitions.  Finally, it creates a shell script `config.status' that
you can run in the future to recreate the current configuration, and a
file `config.log' containing compiler output (useful mainly for
debugging `configure').

   It can also use an optional file (typically called `config.cache'
and enabled with `--cache-file=config.cache' or simply `-C') that saves
the results of its tests to speed up reconfiguring.  Caching is
disabled by default to prevent problems with accidental use of stale
cache files.

   If you need to do unusual things to compile the package, please try
to figure out how `configure' could check whether to do them, and mail
diffs or instructions to the address given in the `README' so they can
be considered for the next release.  If you are using the cache, and at
some point `config.cache' contains results you don't want to keep, you
may remove or edit it.

   The file `configure.ac' (or `configure.in') is used to create
`configure' by a program called `autoconf'.  You need `configure.ac' if
you want to change it or regenerate `configure' using a newer version
of `autoconf'.

   The simplest way to compile this package is:

  1. `cd' to the directory containing the package's source code and type
     `./configure' to configure the package for your system.

     Running `configure' might take a while.  While running, it prints
     some messages telling which features it is checking for.

  2. Type `make' to compile the package.

  3. Optionally, type `make check' to run any self-tests that come with
     the package, generally using the just-built uninstalled binaries.

  4. Type `make install' to install the programs and any data files and
     documentation.  When installing into a prefix owned by root, it is
     recommended that the package be configured and built as a regular
     user, and only the `make install' phase executed with root
     privileges.

  5. Optionally, type `make installcheck' to repeat any self-tests, but
     this time using the binaries in their final installed location.
     This target does not install anything.  Running this target as a
     regular user, particularly if the prior `make install' required
     root privileges, verifies that the installation completed
     correctly.

  6. You can remove the program binaries and object files from the
     source code directory by typing `make clean'.  To also remove the
     files that `configure' created (so you can compile the package for
     a different kind of computer), type `make distclean'.  There is
     also a `make maintainer-clean' target, but that is intended mainly
     for the package's developers.  If you use it, you may have to get
     all sorts of other programs in order to regenerate files that came
     with the distribution.

  7. Often, you can also type `make uninstall' to remove the installed
     files again.  In practice, not all packages have tested that
     uninstallation works correctly, even though it is required by the
     GNU Coding Standards.

  8. Some packages, particularly those that use Automake, provide `make
     distcheck', which can by used by developers to test that all other
     targets like `make install' and `make uninstall' work correctly.
     This target is generally not run by end users.

Compilers and Options
=====================

   Some systems require unusual options for compilation or linking that
the `configure' script does not know about.  Run `./configure --help'
for details on some of the pertinent environment variables.

   You can give `configure' initial values for configuration parameters
by setting variables in the command line or in the environment.  Here
is an example:

     ./configure CC=c99 CFLAGS=-g LIBS=-lposix

   *Note Defining Variables::, for more details.

Compiling For Multiple Architectures
====================================

   You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory.  To do this, you can use GNU `make'.  `cd' to the
directory where you want the object files and executables to go and run
the `configure' script.  `configure' automatically checks for the
source code in the directory that `configure' is in and in `..'.  This
is known as a "VPATH" build.

   With a non-GNU `make', it is safer to compile the package for one
architecture at a time in the source code directory.  After you have
installed the package for one architecture, use `make distclean' before
reconfiguring for another architecture.

   On MacOS X 10.5 and later systems, you can create libraries and
executables that work on multiple system types--known as "fat" or
"universal" binaries--by specifying multiple `-arch' options to the
compiler but only a single `-arch' option to the preprocessor.  Like
this:

     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CPP="gcc -E" CXXCPP="g++ -E"

   This is not guaranteed to produce working output in all cases, you
may have to build one architecture at a time and combine the results
using the `lipo' tool if you have problems.

Installation Names
==================

   By default, `make install' installs the package's commands under
`/usr/local/bin', include files under `/usr/local/include', etc.  You
can specify an installation prefix other than `/usr/local' by giving
`configure' the option `--prefix=PREFIX', where PREFIX must be an
absolute file name.

   You can specify separate installation prefixes for
architecture-specific files and architecture-independent files.  If you
pass the option `--exec-prefix=PREFIX' to `configure', the package uses
PREFIX as the prefix for installing programs and libraries.
Documentation and other data files still use the regular prefix.

   In addition, if you use an unusual directory layout you can give
options like `--bindir=DIR' to specify different values for particular
kinds of files.  Run `configure --help' for a list of the directories
you can set and what kinds of files go in them.  In general, the
default for these options is expressed in terms of `${prefix}', so that
specifying just `--prefix' will affect all of the other directory
specifications that were not explicitly provided.

   The most portable way to affect installation locations is to pass the
correct locations to `configure'; however, many packages provide one or
both of the following shortcuts of passing variable assignments to the
`make install' command line to change installation locations without
having to reconfigure or recompile.

   The first method involves providing an override variable for each
affected directory.  For example, `make install
prefix=/alternate/directory' will choose an alternate location for all
directory configuration variables that were expressed in terms of
`${prefix}'.  Any directories that were specified during `configure',
but not in terms of `${prefix}', must each be overridden at install
time for the entire installation to be relocated.  The approach of
makefile variable overrides for each directory variable is required by
the GNU Coding Standards, and ideally causes no recompilation.
However, some platforms have known limitations with the semantics of
shared libraries that end up requiring recompilation when using this
method, particularly noticeable in packages that use GNU Libtool.

   The second method involves providing the `DESTDIR' variable.  For
example, `make install DESTDIR=/alternate/directory' will prepend
`/alternate/directory' before all installation names.  The approach of
`DESTDIR' overrides is not required by the GNU Coding Standards, and
does not work on platforms that have drive letters.  On the other hand,
it does better at avoiding recompilation issues, and works well even
when some directory options were not specified in terms of `${prefix}'
at `configure' time.

Optional Features
=================

   If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving `configure' the
option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.

   Some packages pay attention to `--enable-FEATURE' options to
`configure', where FEATURE indicates an optional part of the package.
They may also pay attention to `--with-PACKAGE' options, where PACKAGE
is something like `gnu-as' or `x' (for the X Window System).  The
`README' should mention any `--enable-' and `--with-' options that the
package recognizes.

   For packages that use the X Window System, `configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the `configure' options `--x-includes=DIR' and
`--x-libraries=DIR' to specify their locations.

   Some packages offer the ability to configure how verbose the
execution of `make' will be.  For these packages, running `./configure
--enable-silent-rules' sets the default to minimal output, which can be
overridden with `make V=1'; while running `./configure
--disable-silent-rules' sets the default to verbose, which can be
overridden with `make V=0'.

Particular systems
==================

   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
CC is not installed, it is recommended to use the following options in
order to use an ANSI C compiler:

     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"

and if that doesn't work, install pre-built binaries of GCC for HP-UX.

   HP-UX `make' updates targets which have the same time stamps as
their prerequisites, which makes it generally unusable when shipped
generated files such as `configure' are involved.  Use GNU `make'
instead.

   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
a workaround.  If GNU CC is not installed, it is therefore recommended
to try

     ./configure CC="cc"

and if that doesn't work, try

     ./configure CC="cc -nodtk"

   On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
directory contains several dysfunctional programs; working variants of
these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
in your `PATH', put it _after_ `/usr/bin'.

   On Haiku, software installed for all users goes in `/boot/common',
not `/usr/local'.  It is recommended to use the following options:

     ./configure --prefix=/boot/common

Specifying the System Type
==========================

   There may be some features `configure' cannot figure out
automatically, but needs to determine by the type of machine the package
will run on.  Usually, assuming the package is built to be run on the
_same_ architectures, `configure' can figure that out, but if it prints
a message saying it cannot guess the machine type, give it the
`--build=TYPE' option.  TYPE can either be a short name for the system
type, such as `sun4', or a canonical name which has the form:

     CPU-COMPANY-SYSTEM

where SYSTEM can have one of these forms:

     OS
     KERNEL-OS

   See the file `config.sub' for the possible values of each field.  If
`config.sub' isn't included in this package, then this package doesn't
need to know the machine type.

   If you are _building_ compiler tools for cross-compiling, you should
use the option `--target=TYPE' to select the type of system they will
produce code for.

   If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with `--host=TYPE'.

Sharing Defaults
================

   If you want to set default values for `configure' scripts to share,
you can create a site shell script called `config.site' that gives
default values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists.  Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.

Defining Variables
==================

   Variables not defined in a site shell script can be set in the
environment passed to `configure'.  However, some packages may run
configure again during the build, and the customized values of these
variables may be lost.  In order to avoid this problem, you should set
them in the `configure' command line, using `VAR=value'.  For example:

     ./configure CC=/usr/local2/bin/gcc

causes the specified `gcc' to be used as the C compiler (unless it is
overridden in the site shell script).

Unfortunately, this technique does not work for `CONFIG_SHELL' due to
an Autoconf bug.  Until the bug is fixed you can use this workaround:

     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash

`configure' Invocation
======================

   `configure' recognizes the following options to control how it
operates.

`--help'
`-h'
     Print a summary of all of the options to `configure', and exit.

`--help=short'
`--help=recursive'
     Print a summary of the options unique to this package's
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     only in the top level, while the `recursive' variant lists options
     also present in any nested packages.

`--version'
`-V'
     Print the version of Autoconf used to generate the `configure'
     script, and exit.

`--cache-file=FILE'
     Enable the cache: use and save the results of the tests in FILE,
     traditionally `config.cache'.  FILE defaults to `/dev/null' to
     disable caching.

`--config-cache'
`-C'
     Alias for `--cache-file=config.cache'.

`--quiet'
`--silent'
`-q'
     Do not print messages saying which checks are being made.  To
     suppress all normal output, redirect it to `/dev/null' (any error
     messages will still be shown).

`--srcdir=DIR'
     Look for the package's source code in directory DIR.  Usually
     `configure' can determine that directory automatically.

`--prefix=DIR'
     Use DIR as the installation prefix.  *note Installation Names::
     for more details, including other options available for fine-tuning
     the installation locations.

`--no-create'
`-n'
     Run the configure checks, but stop before creating any output
     files.

`configure' also accepts some other, not widely useful, options.  Run
`configure --help' for more details.

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	tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz
	$(am__post_remove_distdir)

dist-tarZ: distdir
	@echo WARNING: "Support for distribution archives compressed with" \
		       "legacy program 'compress' is deprecated." >&2
	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
	$(am__post_remove_distdir)

dist-shar: distdir
	@echo WARNING: "Support for shar distribution archives is" \
	               "deprecated." >&2
	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
	shar $(distdir) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).shar.gz
	$(am__post_remove_distdir)

dist-zip: distdir
	-rm -f $(distdir).zip
	zip -rq $(distdir).zip $(distdir)
	$(am__post_remove_distdir)

dist dist-all:
	$(MAKE) $(AM_MAKEFLAGS) $(DIST_TARGETS) am__post_remove_distdir='@:'
	$(am__post_remove_distdir)

# This target untars the dist file and tries a VPATH configuration.  Then
# it guarantees that the distribution is self-contained by making another
# tarfile.
distcheck: dist
	case '$(DIST_ARCHIVES)' in \
	*.tar.gz*) \
	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).tar.gz | $(am__untar) ;;\
	*.tar.bz2*) \
	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
	*.tar.lz*) \
	  lzip -dc $(distdir).tar.lz | $(am__untar) ;;\
	*.tar.xz*) \
	  xz -dc $(distdir).tar.xz | $(am__untar) ;;\
	*.tar.Z*) \
	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
	*.shar.gz*) \
	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).shar.gz | unshar ;;\
	*.zip*) \
	  unzip $(distdir).zip ;;\
	esac
	chmod -R a-w $(distdir)
	chmod u+w $(distdir)
	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
	chmod a-w $(distdir)
	test -d $(distdir)/_build || exit 0; \
	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
	  && am__cwd=`pwd` \
	  && $(am__cd) $(distdir)/_build/sub \
	  && ../../configure \
	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
	    $(DISTCHECK_CONFIGURE_FLAGS) \
	    --srcdir=../.. --prefix="$$dc_install_base" \
	  && $(MAKE) $(AM_MAKEFLAGS) \
	  && $(MAKE) $(AM_MAKEFLAGS) dvi \
	  && $(MAKE) $(AM_MAKEFLAGS) check \
	  && $(MAKE) $(AM_MAKEFLAGS) install \
	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
	        distuninstallcheck \
	  && chmod -R a-w "$$dc_install_base" \
	  && ({ \
	       (cd ../.. && umask 077 && mkdir "$$dc_destdir") \
	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" install \
	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" uninstall \
	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" \
	            distuninstallcheck_dir="$$dc_destdir" distuninstallcheck; \
	      } || { rm -rf "$$dc_destdir"; exit 1; }) \
	  && rm -rf "$$dc_destdir" \
	  && $(MAKE) $(AM_MAKEFLAGS) dist \
	  && rm -rf $(DIST_ARCHIVES) \
	  && $(MAKE) $(AM_MAKEFLAGS) distcleancheck \
	  && cd "$$am__cwd" \
	  || exit 1
	$(am__post_remove_distdir)
	@(echo "$(distdir) archives ready for distribution: "; \
	  list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \
	  sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x'
distuninstallcheck:
	@test -n '$(distuninstallcheck_dir)' || { \
	  echo 'ERROR: trying to run $@ with an empty' \
	       '$$(distuninstallcheck_dir)' >&2; \
	  exit 1; \
	}; \
	$(am__cd) '$(distuninstallcheck_dir)' || { \
	  echo 'ERROR: cannot chdir into $(distuninstallcheck_dir)' >&2; \
	  exit 1; \
	}; \
	test `$(am__distuninstallcheck_listfiles) | wc -l` -eq 0 \
	   || { echo "ERROR: files left after uninstall:" ; \
	        if test -n "$(DESTDIR)"; then \
	          echo "  (check DESTDIR support)"; \
	        fi ; \
	        $(distuninstallcheck_listfiles) ; \
	        exit 1; } >&2
distcleancheck: distclean
	@if test '$(srcdir)' = . ; then \
	  echo "ERROR: distcleancheck can only run from a VPATH build" ; \
	  exit 1 ; \
	fi
	@test `$(distcleancheck_listfiles) | wc -l` -eq 0 \
	  || { echo "ERROR: files left in build directory after distclean:" ; \
	       $(distcleancheck_listfiles) ; \
	       exit 1; } >&2
check-am: all-am
check: check-am
all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) $(MANS) $(DATA) $(HEADERS)
install-binPROGRAMS: install-libLTLIBRARIES

installdirs:
	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)" "$(DESTDIR)$(man1dir)" "$(DESTDIR)$(pkgconfigdir)" "$(DESTDIR)$(includedir)"; do \
	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
	done
install: install-am
install-exec: install-exec-am
install-data: install-data-am
uninstall: uninstall-am

install-am: all-am
	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am

installcheck: installcheck-am
install-strip:
	if test -z '$(STRIP)'; then \
	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
	      install; \
	else \
	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
	fi
mostlyclean-generic:

clean-generic:

distclean-generic:
	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)

maintainer-clean-generic:
	@echo "This command is intended for maintainers to use"
	@echo "it deletes files that may require special tools to rebuild."
clean: clean-am

clean-am: clean-binPROGRAMS clean-generic clean-libLTLIBRARIES \
	clean-libtool mostlyclean-am

distclean: distclean-am
	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
	-rm -rf ./$(DEPDIR)
	-rm -f Makefile
distclean-am: clean-am distclean-compile distclean-generic \
	distclean-libtool distclean-tags

dvi: dvi-am

dvi-am:

html: html-am

html-am:

info: info-am

info-am:

install-data-am: install-includeHEADERS install-man \
	install-pkgconfigDATA

install-dvi: install-dvi-am

install-dvi-am:

install-exec-am: install-binPROGRAMS install-libLTLIBRARIES

install-html: install-html-am

install-html-am:

install-info: install-info-am

install-info-am:

install-man: install-man1

install-pdf: install-pdf-am

install-pdf-am:

install-ps: install-ps-am

install-ps-am:

installcheck-am:

maintainer-clean: maintainer-clean-am
	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
	-rm -rf $(top_srcdir)/autom4te.cache
	-rm -rf ./$(DEPDIR)
	-rm -f Makefile
maintainer-clean-am: distclean-am maintainer-clean-generic

mostlyclean: mostlyclean-am

mostlyclean-am: mostlyclean-compile mostlyclean-generic \
	mostlyclean-libtool

pdf: pdf-am

pdf-am:

ps: ps-am

ps-am:

uninstall-am: uninstall-binPROGRAMS uninstall-includeHEADERS \
	uninstall-libLTLIBRARIES uninstall-man uninstall-pkgconfigDATA

uninstall-man: uninstall-man1

.MAKE: install-am install-strip

.PHONY: CTAGS GTAGS TAGS all all-am am--refresh check check-am clean \
	clean-binPROGRAMS clean-cscope clean-generic \
	clean-libLTLIBRARIES clean-libtool cscope cscopelist-am ctags \
	ctags-am dist dist-all dist-bzip2 dist-gzip dist-lzip \
	dist-shar dist-tarZ dist-xz dist-zip distcheck distclean \
	distclean-compile distclean-generic distclean-libtool \
	distclean-tags distcleancheck distdir distuninstallcheck dvi \
	dvi-am html html-am info info-am install install-am \
	install-binPROGRAMS install-data install-data-am install-dvi \
	install-dvi-am install-exec install-exec-am install-html \
	install-html-am install-includeHEADERS install-info \
	install-info-am install-libLTLIBRARIES install-man \
	install-man1 install-pdf install-pdf-am install-pkgconfigDATA \
	install-ps install-ps-am install-strip installcheck \
	installcheck-am installdirs maintainer-clean \
	maintainer-clean-generic mostlyclean mostlyclean-compile \
	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
	tags tags-am uninstall uninstall-am uninstall-binPROGRAMS \
	uninstall-includeHEADERS uninstall-libLTLIBRARIES \
	uninstall-man uninstall-man1 uninstall-pkgconfigDATA

.PRECIOUS: Makefile


# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:

#### DO NOT EDIT ####
# This makefile is automatically generated from the Makefile.msc at
# the root of the canonical SQLite source tree (not the
# amalgamation tarball) using the tool/mkmsvcmin.tcl
# script.
#

#
# nmake Makefile for SQLite
#
###############################################################################
############################## START OF OPTIONS ###############################
###############################################################################

# The toplevel directory of the source tree.  This is the directory
# that contains this "Makefile.msc".
#
TOP = .


# Set this non-0 to enable full warnings (-W4, etc) when compiling.
#
!IFNDEF USE_FULLWARN
USE_FULLWARN = 1
!ENDIF

# Set this non-0 to enable treating warnings as errors (-WX, etc) when
# compiling.
#
!IFNDEF USE_FATAL_WARN
USE_FATAL_WARN = 0
!ENDIF

# Set this non-0 to enable full runtime error checks (-RTC1, etc).  This
# has no effect if (any) optimizations are enabled.
#
!IFNDEF USE_RUNTIME_CHECKS
USE_RUNTIME_CHECKS = 0
!ENDIF

# Set this non-0 to create a SQLite amalgamation file that excludes the
# various built-in extensions.
#
!IFNDEF MINIMAL_AMALGAMATION
MINIMAL_AMALGAMATION = 0
!ENDIF

# Set this non-0 to use "stdcall" calling convention for the core library
# and shell executable.
#
!IFNDEF USE_STDCALL
USE_STDCALL = 0
!ENDIF

# Set this non-0 to have the shell executable link against the core dynamic
# link library.
#
!IFNDEF DYNAMIC_SHELL
DYNAMIC_SHELL = 0
!ENDIF

# Set this non-0 to enable extra code that attempts to detect misuse of the
# SQLite API.
#
!IFNDEF API_ARMOR
API_ARMOR = 0
!ENDIF

# If necessary, create a list of harmless compiler warnings to disable when
# compiling the various tools.  For the SQLite source code itself, warnings,
# if any, will be disabled from within it.
#
!IFNDEF NO_WARN
!IF $(USE_FULLWARN)!=0
NO_WARN = -wd4054 -wd4055 -wd4100 -wd4127 -wd4130 -wd4152 -wd4189 -wd4206
NO_WARN = $(NO_WARN) -wd4210 -wd4232 -wd4305 -wd4306 -wd4702 -wd4706
!ENDIF
!ENDIF

# Set this non-0 to use the library paths and other options necessary for
# Windows Phone 8.1.
#
!IFNDEF USE_WP81_OPTS
USE_WP81_OPTS = 0
!ENDIF

# Set this non-0 to split the SQLite amalgamation file into chunks to
# be used for debugging with Visual Studio.
#
!IFNDEF SPLIT_AMALGAMATION
SPLIT_AMALGAMATION = 0
!ENDIF


# Set this non-0 to dynamically link to the MSVC runtime library.
#
!IFNDEF USE_CRT_DLL
USE_CRT_DLL = 0
!ENDIF

# Set this non-0 to link to the RPCRT4 library.
#
!IFNDEF USE_RPCRT4_LIB
USE_RPCRT4_LIB = 0
!ENDIF

# Set this non-0 to generate assembly code listings for the source code
# files.
#
!IFNDEF USE_LISTINGS
USE_LISTINGS = 0
!ENDIF

# Set this non-0 to attempt setting the native compiler automatically
# for cross-compiling the command line tools needed during the compilation
# process.
#
!IFNDEF XCOMPILE
XCOMPILE = 0
!ENDIF

# Set this non-0 to use the native libraries paths for cross-compiling
# the command line tools needed during the compilation process.
#
!IFNDEF USE_NATIVE_LIBPATHS
USE_NATIVE_LIBPATHS = 0
!ENDIF

# Set this 0 to skip the compiling and embedding of version resources.
#
!IFNDEF USE_RC
USE_RC = 1
!ENDIF

# Set this non-0 to compile binaries suitable for the WinRT environment.
# This setting does not apply to any binaries that require Tcl to operate
# properly (i.e. the text fixture, etc).
#
!IFNDEF FOR_WINRT
FOR_WINRT = 0
!ENDIF

# Set this non-0 to compile binaries suitable for the UWP environment.
# This setting does not apply to any binaries that require Tcl to operate
# properly (i.e. the text fixture, etc).
#
!IFNDEF FOR_UWP
FOR_UWP = 0
!ENDIF

# Set this non-0 to compile binaries suitable for the Windows 10 platform.
#
!IFNDEF FOR_WIN10
FOR_WIN10 = 0
!ENDIF


# Set this to non-0 to create and use PDBs.
#
!IFNDEF SYMBOLS
SYMBOLS = 1
!ENDIF

# Set this to non-0 to use the SQLite debugging heap subsystem.
#
!IFNDEF MEMDEBUG
MEMDEBUG = 0
!ENDIF

# Set this to non-0 to use the Win32 native heap subsystem.
#
!IFNDEF WIN32HEAP
WIN32HEAP = 0
!ENDIF

# Set this to non-0 to enable OSTRACE() macros, which can be useful when
# debugging.
#
!IFNDEF OSTRACE
OSTRACE = 0
!ENDIF

# Set this to one of the following values to enable various debugging
# features.  Each level includes the debugging options from the previous
# levels.  Currently, the recognized values for DEBUG are:
#
# 0 == NDEBUG: Disables assert() and other runtime diagnostics.
# 1 == SQLITE_ENABLE_API_ARMOR: extra attempts to detect misuse of the API.
# 2 == Disables NDEBUG and all optimizations and then enables PDBs.
# 3 == SQLITE_DEBUG: Enables various diagnostics messages and code.
# 4 == SQLITE_WIN32_MALLOC_VALIDATE: Validate the Win32 native heap per call.
# 5 == SQLITE_DEBUG_OS_TRACE: Enables output from the OSTRACE() macros.
# 6 == SQLITE_ENABLE_IOTRACE: Enables output from the IOTRACE() macros.
#
!IFNDEF DEBUG
DEBUG = 0
!ENDIF

# Enable use of available compiler optimizations?  Normally, this should be
# non-zero.  Setting this to zero, thus disabling all compiler optimizations,
# can be useful for testing.
#
!IFNDEF OPTIMIZATIONS
OPTIMIZATIONS = 2
!ENDIF

# Set this to non-0 to enable support for the session extension.
#
!IFNDEF SESSION
SESSION = 0
!ENDIF

# Set the source code file to be used by executables and libraries when
# they need the amalgamation.
#
!IFNDEF SQLITE3C
!IF $(SPLIT_AMALGAMATION)!=0
SQLITE3C = sqlite3-all.c
!ELSE
SQLITE3C = sqlite3.c
!ENDIF
!ENDIF

# Set the include code file to be used by executables and libraries when
# they need SQLite.
#
!IFNDEF SQLITE3H
SQLITE3H = sqlite3.h
!ENDIF

# This is the name to use for the SQLite dynamic link library (DLL).
#
!IFNDEF SQLITE3DLL
!IF $(FOR_WIN10)!=0
SQLITE3DLL = winsqlite3.dll
!ELSE
SQLITE3DLL = sqlite3.dll
!ENDIF
!ENDIF

# This is the name to use for the SQLite import library (LIB).
#
!IFNDEF SQLITE3LIB
!IF $(FOR_WIN10)!=0
SQLITE3LIB = winsqlite3.lib
!ELSE
SQLITE3LIB = sqlite3.lib
!ENDIF
!ENDIF

# This is the name to use for the SQLite shell executable (EXE).
#
!IFNDEF SQLITE3EXE
!IF $(FOR_WIN10)!=0
SQLITE3EXE = winsqlite3shell.exe
!ELSE
SQLITE3EXE = sqlite3.exe
!ENDIF
!ENDIF

# This is the argument used to set the program database (PDB) file for the
# SQLite shell executable (EXE).
#
!IFNDEF SQLITE3EXEPDB
!IF $(FOR_WIN10)!=0
SQLITE3EXEPDB =
!ELSE
SQLITE3EXEPDB = /pdb:sqlite3sh.pdb
!ENDIF
!ENDIF


# These are the "standard" SQLite compilation options used when compiling for
# the Windows platform.
#
!IFNDEF OPT_FEATURE_FLAGS
!IF $(MINIMAL_AMALGAMATION)==0
OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS3=1
OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_RTREE=1
!ENDIF
OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_COLUMN_METADATA=1
!ENDIF

# Should the session extension be enabled?  If so, add compilation options
# to enable it.
#
!IF $(SESSION)!=0
OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION=1
OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK=1
!ENDIF

# These are the "extended" SQLite compilation options used when compiling for
# the Windows 10 platform.
#
!IFNDEF EXT_FEATURE_FLAGS
!IF $(FOR_WIN10)!=0
EXT_FEATURE_FLAGS = $(EXT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS4=1
EXT_FEATURE_FLAGS = $(EXT_FEATURE_FLAGS) -DSQLITE_SYSTEM_MALLOC=1
EXT_FEATURE_FLAGS = $(EXT_FEATURE_FLAGS) -DSQLITE_OMIT_LOCALTIME=1
!ELSE
EXT_FEATURE_FLAGS =
!ENDIF
!ENDIF

###############################################################################
############################### END OF OPTIONS ################################
###############################################################################

# When compiling for the Windows 10 platform, the PLATFORM macro must be set
# to an appropriate value (e.g. x86, x64, arm, arm64, etc).
#
!IF $(FOR_WIN10)!=0
!IFNDEF PLATFORM
!ERROR Using the FOR_WIN10 option requires a value for PLATFORM.
!ENDIF
!ENDIF

# This assumes that MSVC is always installed in 32-bit Program Files directory
# and sets the variable for use in locating other 32-bit installs accordingly.
#
PROGRAMFILES_X86 = $(VCINSTALLDIR)\..\..
PROGRAMFILES_X86 = $(PROGRAMFILES_X86:\\=\)

# Check for the predefined command macro CC.  This should point to the compiler
# binary for the target platform.  If it is not defined, simply define it to
# the legacy default value 'cl.exe'.
#
!IFNDEF CC
CC = cl.exe
!ENDIF

# Check for the predefined command macro CSC.  This should point to a working
# C Sharp compiler binary.  If it is not defined, simply define it to the
# legacy default value 'csc.exe'.
#
!IFNDEF CSC
CSC = csc.exe
!ENDIF

# Check for the command macro LD.  This should point to the linker binary for
# the target platform.  If it is not defined, simply define it to the legacy
# default value 'link.exe'.
#
!IFNDEF LD
LD = link.exe
!ENDIF

# Check for the predefined command macro RC.  This should point to the resource
# compiler binary for the target platform.  If it is not defined, simply define
# it to the legacy default value 'rc.exe'.
#
!IFNDEF RC
RC = rc.exe
!ENDIF

# Check for the MSVC runtime library path macro.  Otherwise, this value will
# default to the 'lib' directory underneath the MSVC installation directory.
#
!IFNDEF CRTLIBPATH
CRTLIBPATH = $(VCINSTALLDIR)\lib
!ENDIF

CRTLIBPATH = $(CRTLIBPATH:\\=\)

# Check for the command macro NCC.  This should point to the compiler binary
# for the platform the compilation process is taking place on.  If it is not
# defined, simply define it to have the same value as the CC macro.  When
# cross-compiling, it is suggested that this macro be modified via the command
# line (since nmake itself does not provide a built-in method to guess it).
# For example, to use the x86 compiler when cross-compiling for x64, a command
# line similar to the following could be used (all on one line):
#
#     nmake /f Makefile.msc sqlite3.dll
#           XCOMPILE=1 USE_NATIVE_LIBPATHS=1
#
# Alternatively, the full path and file name to the compiler binary for the
# platform the compilation process is taking place may be specified (all on
# one line):
#
#     nmake /f Makefile.msc sqlite3.dll
#           "NCC=""%VCINSTALLDIR%\bin\cl.exe"""
#           USE_NATIVE_LIBPATHS=1
#
!IFDEF NCC
NCC = $(NCC:\\=\)
!ELSEIF $(XCOMPILE)!=0
NCC = "$(VCINSTALLDIR)\bin\$(CC)"
NCC = $(NCC:\\=\)
!ELSE
NCC = $(CC)
!ENDIF

# Check for the MSVC native runtime library path macro.  Otherwise,
# this value will default to the 'lib' directory underneath the MSVC
# installation directory.
#
!IFNDEF NCRTLIBPATH
NCRTLIBPATH = $(VCINSTALLDIR)\lib
!ENDIF

NCRTLIBPATH = $(NCRTLIBPATH:\\=\)

# Check for the Platform SDK library path macro.  Otherwise, this
# value will default to the 'lib' directory underneath the Windows
# SDK installation directory (the environment variable used appears
# to be available when using Visual C++ 2008 or later via the
# command line).
#
!IFNDEF NSDKLIBPATH
NSDKLIBPATH = $(WINDOWSSDKDIR)\lib
!ENDIF

NSDKLIBPATH = $(NSDKLIBPATH:\\=\)

# Check for the UCRT library path macro.  Otherwise, this value will
# default to the version-specific, platform-specific 'lib' directory
# underneath the Windows SDK installation directory.
#
!IFNDEF UCRTLIBPATH
UCRTLIBPATH = $(WINDOWSSDKDIR)\lib\$(WINDOWSSDKLIBVERSION)\ucrt\$(PLATFORM)
!ENDIF

UCRTLIBPATH = $(UCRTLIBPATH:\\=\)

# C compiler and options for use in building executables that
# will run on the platform that is doing the build.
#
!IF $(USE_FULLWARN)!=0
BCC = $(NCC) -nologo -W4 $(CCOPTS) $(BCCOPTS)
!ELSE
BCC = $(NCC) -nologo -W3 $(CCOPTS) $(BCCOPTS)
!ENDIF

# Check if assembly code listings should be generated for the source
# code files to be compiled.
#
!IF $(USE_LISTINGS)!=0
BCC = $(BCC) -FAcs
!ENDIF

# Check if the native library paths should be used when compiling
# the command line tools used during the compilation process.  If
# so, set the necessary macro now.
#
!IF $(USE_NATIVE_LIBPATHS)!=0
NLTLIBPATHS = "/LIBPATH:$(NCRTLIBPATH)" "/LIBPATH:$(NSDKLIBPATH)"

!IFDEF NUCRTLIBPATH
NUCRTLIBPATH = $(NUCRTLIBPATH:\\=\)
NLTLIBPATHS = $(NLTLIBPATHS) "/LIBPATH:$(NUCRTLIBPATH)"
!ENDIF
!ENDIF

# C compiler and options for use in building executables that
# will run on the target platform.  (BCC and TCC are usually the
# same unless your are cross-compiling.)
#
!IF $(USE_FULLWARN)!=0
TCC = $(CC) -nologo -W4 -DINCLUDE_MSVC_H=1 $(CCOPTS) $(TCCOPTS)
!ELSE
TCC = $(CC) -nologo -W3 $(CCOPTS) $(TCCOPTS)
!ENDIF

# Check if warnings should be treated as errors when compiling.
#
!IF $(USE_FATAL_WARN)!=0
TCC = $(TCC) -WX
!ENDIF

TCC = $(TCC) -DSQLITE_OS_WIN=1 -I. -I$(TOP) -fp:precise
RCC = $(RC) -DSQLITE_OS_WIN=1 -I. -I$(TOP) $(RCOPTS) $(RCCOPTS)

# Check if we want to use the "stdcall" calling convention when compiling.
# This is not supported by the compilers for non-x86 platforms.  It should
# also be noted here that building any target with these "stdcall" options
# will most likely fail if the Tcl library is also required.  This is due
# to how the Tcl library functions are declared and exported (i.e. without
# an explicit calling convention, which results in "cdecl").
#
!IF $(USE_STDCALL)!=0 || $(FOR_WIN10)!=0
!IF "$(PLATFORM)"=="x86"
CORE_CCONV_OPTS = -Gz -DSQLITE_CDECL=__cdecl -DSQLITE_APICALL=__stdcall -DSQLITE_CALLBACK=__stdcall -DSQLITE_SYSAPI=__stdcall
SHELL_CCONV_OPTS = -Gz -DSQLITE_CDECL=__cdecl -DSQLITE_APICALL=__stdcall -DSQLITE_CALLBACK=__stdcall -DSQLITE_SYSAPI=__stdcall
!ELSE
!IFNDEF PLATFORM
CORE_CCONV_OPTS = -Gz -DSQLITE_CDECL=__cdecl -DSQLITE_APICALL=__stdcall -DSQLITE_CALLBACK=__stdcall -DSQLITE_SYSAPI=__stdcall
SHELL_CCONV_OPTS = -Gz -DSQLITE_CDECL=__cdecl -DSQLITE_APICALL=__stdcall -DSQLITE_CALLBACK=__stdcall -DSQLITE_SYSAPI=__stdcall
!ELSE
CORE_CCONV_OPTS =
SHELL_CCONV_OPTS =
!ENDIF
!ENDIF
!ELSE
CORE_CCONV_OPTS =
SHELL_CCONV_OPTS =
!ENDIF

# These are additional compiler options used for the core library.
#
!IFNDEF CORE_COMPILE_OPTS
!IF $(DYNAMIC_SHELL)!=0 || $(FOR_WIN10)!=0
CORE_COMPILE_OPTS = $(CORE_CCONV_OPTS) -DSQLITE_API=__declspec(dllexport)
!ELSE
CORE_COMPILE_OPTS = $(CORE_CCONV_OPTS)
!ENDIF
!ENDIF

# These are the additional targets that the core library should depend on
# when linking.
#
!IFNDEF CORE_LINK_DEP
!IF $(DYNAMIC_SHELL)!=0
CORE_LINK_DEP =
!ELSEIF $(FOR_WIN10)==0 || "$(PLATFORM)"=="x86"
CORE_LINK_DEP = sqlite3.def
!ELSE
CORE_LINK_DEP =
!ENDIF
!ENDIF

# These are additional linker options used for the core library.
#
!IFNDEF CORE_LINK_OPTS
!IF $(DYNAMIC_SHELL)!=0
CORE_LINK_OPTS =
!ELSEIF $(FOR_WIN10)==0 || "$(PLATFORM)"=="x86"
CORE_LINK_OPTS = /DEF:sqlite3.def
!ELSE
CORE_LINK_OPTS =
!ENDIF
!ENDIF

# These are additional compiler options used for the shell executable.
#
!IFNDEF SHELL_COMPILE_OPTS
!IF $(DYNAMIC_SHELL)!=0 || $(FOR_WIN10)!=0
SHELL_COMPILE_OPTS = $(SHELL_CCONV_OPTS) -DSQLITE_API=__declspec(dllimport)
!ELSE
SHELL_COMPILE_OPTS = $(SHELL_CCONV_OPTS)
!ENDIF
!ENDIF

# This is the source code that the shell executable should be compiled
# with.
#
!IFNDEF SHELL_CORE_SRC
!IF $(DYNAMIC_SHELL)!=0 || $(FOR_WIN10)!=0
SHELL_CORE_SRC =
!ELSE
SHELL_CORE_SRC = $(SQLITE3C)
!ENDIF
!ENDIF

# This is the core library that the shell executable should depend on.
#
!IFNDEF SHELL_CORE_DEP
!IF $(DYNAMIC_SHELL)!=0 || $(FOR_WIN10)!=0
SHELL_CORE_DEP = $(SQLITE3DLL)
!ELSE
SHELL_CORE_DEP =
!ENDIF
!ENDIF

# This is the core library that the shell executable should link with.
#
!IFNDEF SHELL_CORE_LIB
!IF $(DYNAMIC_SHELL)!=0 || $(FOR_WIN10)!=0
SHELL_CORE_LIB = $(SQLITE3LIB)
!ELSE
SHELL_CORE_LIB =
!ENDIF
!ENDIF

# These are additional linker options used for the shell executable.
#
!IFNDEF SHELL_LINK_OPTS
SHELL_LINK_OPTS = $(SHELL_CORE_LIB)
!ENDIF

# Check if assembly code listings should be generated for the source
# code files to be compiled.
#
!IF $(USE_LISTINGS)!=0
TCC = $(TCC) -FAcs
!ENDIF

# When compiling the library for use in the WinRT environment,
# the following compile-time options must be used as well to
# disable use of Win32 APIs that are not available and to enable
# use of Win32 APIs that are specific to Windows 8 and/or WinRT.
#
!IF $(FOR_WINRT)!=0
TCC = $(TCC) -DSQLITE_OS_WINRT=1
RCC = $(RCC) -DSQLITE_OS_WINRT=1
TCC = $(TCC) -DWINAPI_FAMILY=WINAPI_FAMILY_APP
RCC = $(RCC) -DWINAPI_FAMILY=WINAPI_FAMILY_APP
!ENDIF

# C compiler options for the Windows 10 platform (needs MSVC 2015).
#
!IF $(FOR_WIN10)!=0
TCC = $(TCC) /d2guard4 -D_ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE
BCC = $(BCC) /d2guard4 -D_ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE
!ENDIF

# Also, we need to dynamically link to the correct MSVC runtime
# when compiling for WinRT (e.g. debug or release) OR if the
# USE_CRT_DLL option is set to force dynamically linking to the
# MSVC runtime library.
#
!IF $(FOR_WINRT)!=0 || $(USE_CRT_DLL)!=0
!IF $(DEBUG)>1
TCC = $(TCC) -MDd
BCC = $(BCC) -MDd
!ELSE
TCC = $(TCC) -MD
BCC = $(BCC) -MD
!ENDIF
!ELSE
!IF $(DEBUG)>1
TCC = $(TCC) -MTd
BCC = $(BCC) -MTd
!ELSE
TCC = $(TCC) -MT
BCC = $(BCC) -MT
!ENDIF
!ENDIF


# Define -DNDEBUG to compile without debugging (i.e., for production usage)
# Omitting the define will cause extra debugging code to be inserted and
# includes extra comments when "EXPLAIN stmt" is used.
#
!IF $(DEBUG)==0
TCC = $(TCC) -DNDEBUG
BCC = $(BCC) -DNDEBUG
RCC = $(RCC) -DNDEBUG
!ENDIF

!IF $(DEBUG)>0 || $(API_ARMOR)!=0 || $(FOR_WIN10)!=0
TCC = $(TCC) -DSQLITE_ENABLE_API_ARMOR=1
RCC = $(RCC) -DSQLITE_ENABLE_API_ARMOR=1
!ENDIF

!IF $(DEBUG)>2
TCC = $(TCC) -DSQLITE_DEBUG=1
RCC = $(RCC) -DSQLITE_DEBUG=1
!IF $(DYNAMIC_SHELL)==0
TCC = $(TCC) -DSQLITE_ENABLE_WHERETRACE -DSQLITE_ENABLE_SELECTTRACE
RCC = $(RCC) -DSQLITE_ENABLE_WHERETRACE -DSQLITE_ENABLE_SELECTTRACE
!ENDIF
!ENDIF

!IF $(DEBUG)>4 || $(OSTRACE)!=0
TCC = $(TCC) -DSQLITE_FORCE_OS_TRACE=1 -DSQLITE_DEBUG_OS_TRACE=1
RCC = $(RCC) -DSQLITE_FORCE_OS_TRACE=1 -DSQLITE_DEBUG_OS_TRACE=1
!ENDIF

!IF $(DEBUG)>5
TCC = $(TCC) -DSQLITE_ENABLE_IOTRACE=1
RCC = $(RCC) -DSQLITE_ENABLE_IOTRACE=1
!ENDIF

# Prevent warnings about "insecure" MSVC runtime library functions
# being used.
#
TCC = $(TCC) -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS
BCC = $(BCC) -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS
RCC = $(RCC) -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS

# Prevent warnings about "deprecated" POSIX functions being used.
#
TCC = $(TCC) -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
BCC = $(BCC) -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
RCC = $(RCC) -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS

# Use the SQLite debugging heap subsystem?
#
!IF $(MEMDEBUG)!=0
TCC = $(TCC) -DSQLITE_MEMDEBUG=1
RCC = $(RCC) -DSQLITE_MEMDEBUG=1

# Use native Win32 heap subsystem instead of malloc/free?
#
!ELSEIF $(WIN32HEAP)!=0
TCC = $(TCC) -DSQLITE_WIN32_MALLOC=1
RCC = $(RCC) -DSQLITE_WIN32_MALLOC=1

# Validate the heap on every call into the native Win32 heap subsystem?
#
!IF $(DEBUG)>3
TCC = $(TCC) -DSQLITE_WIN32_MALLOC_VALIDATE=1
RCC = $(RCC) -DSQLITE_WIN32_MALLOC_VALIDATE=1
!ENDIF
!ENDIF


# Compiler options needed for programs that use the readline() library.
#
!IFNDEF READLINE_FLAGS
READLINE_FLAGS = -DHAVE_READLINE=0
!ENDIF

# The library that programs using readline() must link against.
#
!IFNDEF LIBREADLINE
LIBREADLINE =
!ENDIF

# Should the database engine be compiled threadsafe
#
TCC = $(TCC) -DSQLITE_THREADSAFE=1
RCC = $(RCC) -DSQLITE_THREADSAFE=1

# Do threads override each others locks by default (1), or do we test (-1)
#
TCC = $(TCC) -DSQLITE_THREAD_OVERRIDE_LOCK=-1
RCC = $(RCC) -DSQLITE_THREAD_OVERRIDE_LOCK=-1

# Any target libraries which libsqlite must be linked against
#
!IFNDEF TLIBS
TLIBS =
!ENDIF

# Flags controlling use of the in memory btree implementation
#
# SQLITE_TEMP_STORE is 0 to force temporary tables to be in a file, 1 to
# default to file, 2 to default to memory, and 3 to force temporary
# tables to always be in memory.
#
TCC = $(TCC) -DSQLITE_TEMP_STORE=1
RCC = $(RCC) -DSQLITE_TEMP_STORE=1

# Enable/disable loadable extensions, and other optional features
# based on configuration. (-DSQLITE_OMIT*, -DSQLITE_ENABLE*).
# The same set of OMIT and ENABLE flags should be passed to the
# LEMON parser generator and the mkkeywordhash tool as well.

# These are the required SQLite compilation options used when compiling for
# the Windows platform.
#
REQ_FEATURE_FLAGS = $(REQ_FEATURE_FLAGS) -DSQLITE_MAX_TRIGGER_DEPTH=100

# If we are linking to the RPCRT4 library, enable features that need it.
#
!IF $(USE_RPCRT4_LIB)!=0
REQ_FEATURE_FLAGS = $(REQ_FEATURE_FLAGS) -DSQLITE_WIN32_USE_UUID=1
!ENDIF

# Add the required and optional SQLite compilation options into the command
# lines used to invoke the MSVC code and resource compilers.
#
TCC = $(TCC) $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS)
RCC = $(RCC) $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS)

# Add in any optional parameters specified on the commane line, e.g.
# nmake /f Makefile.msc all "OPTS=-DSQLITE_ENABLE_FOO=1 -DSQLITE_OMIT_FOO=1"
#
TCC = $(TCC) $(OPTS)
RCC = $(RCC) $(OPTS)

# If compiling for debugging, add some defines.
#
!IF $(DEBUG)>1
TCC = $(TCC) -D_DEBUG
BCC = $(BCC) -D_DEBUG
RCC = $(RCC) -D_DEBUG
!ENDIF

# If optimizations are enabled or disabled (either implicitly or
# explicitly), add the necessary flags.
#
!IF $(DEBUG)>1 || $(OPTIMIZATIONS)==0
TCC = $(TCC) -Od
BCC = $(BCC) -Od
!IF $(USE_RUNTIME_CHECKS)!=0
TCC = $(TCC) -RTC1
BCC = $(BCC) -RTC1
!ENDIF
!ELSEIF $(OPTIMIZATIONS)>=3
TCC = $(TCC) -Ox
BCC = $(BCC) -Ox
!ELSEIF $(OPTIMIZATIONS)==2
TCC = $(TCC) -O2
BCC = $(BCC) -O2
!ELSEIF $(OPTIMIZATIONS)==1
TCC = $(TCC) -O1
BCC = $(BCC) -O1
!ENDIF

# If symbols are enabled (or compiling for debugging), enable PDBs.
#
!IF $(DEBUG)>1 || $(SYMBOLS)!=0
TCC = $(TCC) -Zi
BCC = $(BCC) -Zi
!ENDIF


# Command line prefixes for compiling code, compiling resources,
# linking, etc.
#
LTCOMPILE = $(TCC) -Fo$@
LTRCOMPILE = $(RCC) -r
LTLIB = lib.exe
LTLINK = $(TCC) -Fe$@

# If requested, link to the RPCRT4 library.
#
!IF $(USE_RPCRT4_LIB)!=0
LTLINK = $(LTLINK) rpcrt4.lib
!ENDIF

# If a platform was set, force the linker to target that.
# Note that the vcvars*.bat family of batch files typically
# set this for you.  Otherwise, the linker will attempt
# to deduce the binary type based on the object files.
!IFDEF PLATFORM
LTLINKOPTS = /NOLOGO /MACHINE:$(PLATFORM)
LTLIBOPTS = /NOLOGO /MACHINE:$(PLATFORM)
!ELSE
LTLINKOPTS = /NOLOGO
LTLIBOPTS = /NOLOGO
!ENDIF

# When compiling for use in the WinRT environment, the following
# linker option must be used to mark the executable as runnable
# only in the context of an application container.
#
!IF $(FOR_WINRT)!=0
LTLINKOPTS = $(LTLINKOPTS) /APPCONTAINER
!IF "$(VISUALSTUDIOVERSION)"=="12.0" || "$(VISUALSTUDIOVERSION)"=="14.0"
!IFNDEF STORELIBPATH
!IF "$(PLATFORM)"=="x86"
STORELIBPATH = $(CRTLIBPATH)\store
!ELSEIF "$(PLATFORM)"=="x64"
STORELIBPATH = $(CRTLIBPATH)\store\amd64
!ELSEIF "$(PLATFORM)"=="ARM"
STORELIBPATH = $(CRTLIBPATH)\store\arm
!ELSE
STORELIBPATH = $(CRTLIBPATH)\store
!ENDIF
!ENDIF
STORELIBPATH = $(STORELIBPATH:\\=\)
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(STORELIBPATH)"
!ENDIF
!ENDIF

# When compiling for Windows Phone 8.1, an extra library path is
# required.
#
!IF $(USE_WP81_OPTS)!=0
!IFNDEF WP81LIBPATH
!IF "$(PLATFORM)"=="x86"
WP81LIBPATH = $(PROGRAMFILES_X86)\Windows Phone Kits\8.1\lib\x86
!ELSEIF "$(PLATFORM)"=="ARM"
WP81LIBPATH = $(PROGRAMFILES_X86)\Windows Phone Kits\8.1\lib\ARM
!ELSE
WP81LIBPATH = $(PROGRAMFILES_X86)\Windows Phone Kits\8.1\lib\x86
!ENDIF
!ENDIF
!ENDIF

# When compiling for Windows Phone 8.1, some extra linker options
# are also required.
#
!IF $(USE_WP81_OPTS)!=0
!IFDEF WP81LIBPATH
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(WP81LIBPATH)"
!ENDIF
LTLINKOPTS = $(LTLINKOPTS) /DYNAMICBASE
LTLINKOPTS = $(LTLINKOPTS) WindowsPhoneCore.lib RuntimeObject.lib PhoneAppModelHost.lib
LTLINKOPTS = $(LTLINKOPTS) /NODEFAULTLIB:kernel32.lib /NODEFAULTLIB:ole32.lib
!ENDIF

# When compiling for UWP or the Windows 10 platform, some extra linker
# options are also required.
#
!IF $(FOR_UWP)!=0 || $(FOR_WIN10)!=0
LTLINKOPTS = $(LTLINKOPTS) /DYNAMICBASE /NODEFAULTLIB:kernel32.lib
LTLINKOPTS = $(LTLINKOPTS) mincore.lib
!IFDEF PSDKLIBPATH
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(PSDKLIBPATH)"
!ENDIF
!ENDIF

!IF $(FOR_WIN10)!=0
LTLINKOPTS = $(LTLINKOPTS) /guard:cf "/LIBPATH:$(UCRTLIBPATH)"
!IF $(DEBUG)>1
LTLINKOPTS = $(LTLINKOPTS) /NODEFAULTLIB:libucrtd.lib /DEFAULTLIB:ucrtd.lib
!ELSE
LTLINKOPTS = $(LTLINKOPTS) /NODEFAULTLIB:libucrt.lib /DEFAULTLIB:ucrt.lib
!ENDIF
!ENDIF

# If either debugging or symbols are enabled, enable PDBs.
#
!IF $(DEBUG)>1 || $(SYMBOLS)!=0
LDFLAGS = /DEBUG $(LDOPTS)
!ELSE
LDFLAGS = $(LDOPTS)
!ENDIF


# You should not have to change anything below this line
###############################################################################


# Object files for the amalgamation.
#
LIBOBJS1 = sqlite3.lo

# Determine the real value of LIBOBJ based on the 'configure' script
#
LIBOBJ = $(LIBOBJS1)

# Determine if embedded resource compilation and usage are enabled.
#
!IF $(USE_RC)!=0
LIBRESOBJS = sqlite3res.lo
!ELSE
LIBRESOBJS =
!ENDIF


# Additional compiler options for the shell.  These are only effective
# when the shell is not being dynamically linked.
#
!IF $(DYNAMIC_SHELL)==0 && $(FOR_WIN10)==0
SHELL_COMPILE_OPTS = $(SHELL_COMPILE_OPTS) -DSQLITE_SHELL_JSON1 -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_EXPLAIN_COMMENTS -DSQLITE_ENABLE_STMTVTAB
!ENDIF


# This is the default Makefile target.  The objects listed here
# are what get build when you type just "make" with no arguments.
#
all:	dll shell

# Dynamic link library section.
#
dll:	$(SQLITE3DLL)

# Shell executable.
#
shell:	$(SQLITE3EXE)


$(SQLITE3DLL):	$(LIBOBJ) $(LIBRESOBJS) $(CORE_LINK_DEP)
	$(LD) $(LDFLAGS) $(LTLINKOPTS) $(LTLIBPATHS) /DLL $(CORE_LINK_OPTS) /OUT:$@ $(LIBOBJ) $(LIBRESOBJS) $(LTLIBS) $(TLIBS)

Replace.exe:
	$(CSC) /target:exe $(TOP)\Replace.cs

sqlite3.def:	Replace.exe $(LIBOBJ)
	echo EXPORTS > sqlite3.def
	dumpbin /all $(LIBOBJ) \
		| .\Replace.exe "^\s+/EXPORT:_?(sqlite3(?:session|changeset|changegroup)?_[^@,]*)(?:@\d+|,DATA)?$$" $$1 true \
		| sort >> sqlite3.def

$(SQLITE3EXE):	$(TOP)\shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\shell.c $(SHELL_CORE_SRC) \
		/link $(SQLITE3EXEPDB) $(LDFLAGS) $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)


# Rule to build the amalgamation
#
sqlite3.lo:	$(SQLITE3C)
	$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(SQLITE3C)


# Rule to build the Win32 resources object file.
#
!IF $(USE_RC)!=0
_HASHCHAR=^#
!IF ![echo !IFNDEF VERSION > rcver.vc] && \
    ![for /F "delims=" %V in ('type "$(SQLITE3H)" ^| find "$(_HASHCHAR)define SQLITE_VERSION "') do (echo VERSION = ^^%V >> rcver.vc)] && \
    ![echo !ENDIF >> rcver.vc]
!INCLUDE rcver.vc
!ENDIF

RESOURCE_VERSION = $(VERSION:^#=)
RESOURCE_VERSION = $(RESOURCE_VERSION:define=)
RESOURCE_VERSION = $(RESOURCE_VERSION:SQLITE_VERSION=)
RESOURCE_VERSION = $(RESOURCE_VERSION:"=)
RESOURCE_VERSION = $(RESOURCE_VERSION:.=,)

$(LIBRESOBJS):	$(TOP)\sqlite3.rc rcver.vc $(SQLITE3H)
	echo #ifndef SQLITE_RESOURCE_VERSION > sqlite3rc.h
	echo #define SQLITE_RESOURCE_VERSION $(RESOURCE_VERSION) >> sqlite3rc.h
	echo #endif >> sqlite3rc.h
	$(LTRCOMPILE) -fo $(LIBRESOBJS) -DRC_VERONLY $(TOP)\sqlite3.rc
!ENDIF


clean:
	del /Q *.exp *.lo *.ilk *.lib *.obj *.ncb *.pdb *.sdf *.suo 2>NUL
	del /Q *.bsc *.def *.cod *.da *.bb *.bbg *.vc gmon.out 2>NUL
	del /Q $(SQLITE3EXE) $(SQLITE3DLL) Replace.exe 2>NUL