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#include "mcp/json.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static bool
reserve(tiny_json_buffer_t *buffer, size_t addition)
{
size_t needed, capacity;
char *resized;
if (buffer->failed || addition > SIZE_MAX - buffer->length - 1)
{
return false;
}
needed = buffer->length + addition + 1;
if (needed <= buffer->capacity)
{
return true;
}
capacity = buffer->capacity == 0 ? 256 : buffer->capacity;
while (capacity < needed)
{
if (capacity > SIZE_MAX / 2)
{
buffer->failed = true;
return false;
}
capacity *= 2;
}
resized = realloc(buffer->data, capacity);
if (resized == NULL)
{
buffer->failed = true;
return false;
}
buffer->data = resized;
buffer->capacity = capacity;
return true;
}
void
tiny_json_init(tiny_json_buffer_t *buffer)
{
memset(buffer, 0, sizeof(*buffer));
}
void
tiny_json_free(tiny_json_buffer_t *buffer)
{
free(buffer->data);
tiny_json_init(buffer);
}
bool
tiny_json_raw_n(tiny_json_buffer_t *buffer, const char *value, size_t length)
{
if (!reserve(buffer, length))
{
return false;
}
memcpy(buffer->data + buffer->length, value, length);
buffer->length += length;
buffer->data[buffer->length] = '\0';
return true;
}
bool
tiny_json_raw(tiny_json_buffer_t *buffer, const char *value)
{
return tiny_json_raw_n(buffer, value, strlen(value));
}
bool
tiny_json_string(tiny_json_buffer_t *buffer, const char *value)
{
const unsigned char *position = (const unsigned char *)value;
if (!tiny_json_raw(buffer, "\""))
{
return false;
}
while (*position)
{
char escaped[7];
if (*position == '"' || *position == '\\')
{
escaped[0] = '\\';
escaped[1] = (char)*position;
escaped[2] = '\0';
tiny_json_raw(buffer, escaped);
}
else if (*position == '\b')
{
tiny_json_raw(buffer, "\\b");
}
else if (*position == '\f')
{
tiny_json_raw(buffer, "\\f");
}
else if (*position == '\n')
{
tiny_json_raw(buffer, "\\n");
}
else if (*position == '\r')
{
tiny_json_raw(buffer, "\\r");
}
else if (*position == '\t')
{
tiny_json_raw(buffer, "\\t");
}
else if (*position < 0x20)
{
snprintf(escaped, sizeof(escaped), "\\u%04x", *position);
tiny_json_raw(buffer, escaped);
}
else
{
tiny_json_raw_n(buffer, (const char *)position, 1);
}
++position;
}
return tiny_json_raw(buffer, "\"");
}
bool
tiny_json_u64(tiny_json_buffer_t *buffer, unsigned long long value)
{
char text[32];
snprintf(text, sizeof(text), "%llu", value);
return tiny_json_raw(buffer, text);
}
bool
tiny_json_i64(tiny_json_buffer_t *buffer, long long value)
{
char text[32];
snprintf(text, sizeof(text), "%lld", value);
return tiny_json_raw(buffer, text);
}
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