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Json.h
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Json.h
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#ifndef __JSON_H__
#define __JSON_H__
#ifndef JSON_API
#define JSON_API
#endif
#ifdef __cplusplus
#define JSON_CONST constexpr
#else
#define JSON_CONST static const
#endif
/* START OF EXTERN "C" */
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stdbool.h>
// -------------------------------------------------------------------
// Types
// -------------------------------------------------------------------
/// JSON type of json value
typedef enum JsonType
{
JsonType_Null,
JsonType_Array,
JsonType_Object,
JsonType_Number,
JsonType_String,
JsonType_Boolean,
} JsonType;
/// JSON error code
typedef enum JsonError
{
JsonError_None,
/* Parsing error */
JsonError_WrongFormat,
JsonError_UnmatchToken,
JsonError_UnknownToken,
JsonError_UnexpectedToken,
JsonError_UnsupportedToken,
/* Finding error */
JsonError_MissingField,
JsonError_WrongType,
/* Runtime error */
JsonError_OutOfMemory,
JsonError_InvalidValue,
JsonError_InternalFatal,
} JsonError;
/// JSON error information
typedef struct JsonResult
{
JsonError error;
const char* message;
//JsonParser* parser;
int32_t memoryUsage;
} JsonResult;
/// Json parse flags
typedef enum JsonParseFlags
{
JsonParseFlags_None = 0,
JsonParseFlags_SupportComment = 1 << 0,
JsonParseFlags_NoStrictTopLevel = 1 << 1,
JsonParseFlags_Default = JsonParseFlags_None,
} JsonParseFlags;
typedef struct Json Json;
//typedef struct JsonParser JsonParser;
typedef struct JsonObjectMember JsonObjectMember;
struct Json
{
JsonType type; // Type of value: number, boolean, string, array, object
int32_t length; // Length of value, always 1 on primitive types, UTF8 string length
union
{
double number;
bool boolean;
const char* string;
Json* array;
JsonObjectMember* object;
};
};
struct JsonObjectMember
{
const char* name;
Json value;
};
// -------------------------------------------------------------------
// Constants
// -------------------------------------------------------------------
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
JSON_CONST Json JSON_NULL = { JsonType_Null , 0 };
JSON_CONST Json JSON_TRUE = { JsonType_Boolean, 0, { true } };
JSON_CONST Json JSON_FALSE = { JsonType_Boolean, 0, { false } };
#if defined(__GNUC__)
#pragma GCC diagnostic warning "-Wmissing-field-initializers"
#endif
// -------------------------------------------------------------------
// Main functions
// -------------------------------------------------------------------
JSON_API JsonResult JsonParse(const char* jsonCode, int32_t jsonCodeLength, JsonParseFlags flags, void* buffer, int32_t bufferSize, Json* outValue);
//JSON_API JsonResult JsonContinueParse(JsonParser* parser, Json* outValue);
JSON_API bool JsonEquals(const Json a, const Json b);
JSON_API bool JsonFind(const Json parent, const char* name, Json* outResult);
JSON_API JsonError JsonFindWithType(const Json parent, const char* name, JsonType type, Json* outResult);
static inline bool JsonValidType(const Json json)
{
return json.type >= JsonType_Null && json.type <= JsonType_Boolean;
}
/* END OF EXTERN "C" */
#ifdef __cplusplus
}
#endif
/* * */
#endif // __JSON_H__
//! LEAVE AN EMPTY LINE HERE, REQUIRE BY GCC/G++
#ifdef JSON_IMPL
#ifndef __JSON_H__
#include "Json.h"
#endif // __JSON_H__
// -------------------------------------------------------------------
// Dependencies
// -------------------------------------------------------------------
#include <math.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <setjmp.h>
#include <stdint.h>
// -------------------------------------------------------------------
// Compiler options
// -------------------------------------------------------------------
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
#ifndef JSON_INLINE
# if defined(_MSC_VER)
# define JSON_INLINE static __forceinline
# elif defined(__GNUC__) || defined(__clang__)
# define JSON_INLINE static __inline__ __attribute__((always_inline))
# elif defined(__cplusplus)
# define JSON_INLINE static inline
# else
# define JSON_INLINE static
# endif
#endif
#ifndef JSON_ASSERT
#define JSON_ASSERT(cond, msg, ...) assert((cond) && (msg))
#endif
// -----------------------------------------------------------------------
// Utility
// -----------------------------------------------------------------------
typedef struct JsonAllocator
{
uint8_t* buffer;
int32_t length;
uint8_t* lowerMarker;
uint8_t* upperMarker;
} JsonAllocator;
static int32_t JsonAllocator_BlockSize(int32_t size)
{
int32_t alignment = sizeof(Json);
int32_t misalign = size & (alignment - 1);
int32_t adjustment = (misalign != 0) * (alignment - misalign);
return size + adjustment;
}
static bool JsonAllocator_Init(JsonAllocator* allocator, void* buffer, int32_t bufferSize)
{
if (buffer && bufferSize > 0)
{
allocator->buffer = (uint8_t*)buffer;
allocator->length = bufferSize;
// Aligned buffer for cache-friendly processing
const int32_t alignment = sizeof(Json);
const int32_t mask = alignment - 1;
const uintptr_t address = (uintptr_t)buffer;
const int32_t misalign = address & mask;
const int32_t adjustment = (misalign != 0) * (alignment - misalign);
buffer = (void*)(address + adjustment);
bufferSize = JsonAllocator_BlockSize(bufferSize - adjustment);
allocator->lowerMarker = (uint8_t*)buffer;
allocator->upperMarker = (uint8_t*)buffer + bufferSize;
return true;
}
return false;
}
static int32_t JsonAllocator_RemainSize(JsonAllocator* allocator)
{
int32_t remain = (int32_t)(allocator->upperMarker - allocator->lowerMarker);
return remain;
}
static bool JsonAllocator_CanAlloc(JsonAllocator* allocator, int32_t size)
{
int32_t remain = JsonAllocator_RemainSize(allocator);
return remain >= size;
}
static void JsonAllocator_FreeLower(JsonAllocator* allocator, void* buffer, int32_t size)
{
const int32_t blockSize = JsonAllocator_BlockSize(size);
void* lastBuffer = allocator->lowerMarker - blockSize;
if (lastBuffer == buffer)
{
allocator->lowerMarker = lastBuffer;
}
}
static void* JsonAllocator_AllocLower(JsonAllocator* allocator, void* oldBuffer, int32_t oldSize, int32_t newSize)
{
JsonAllocator_FreeLower(allocator, oldBuffer, oldSize);
if (newSize <= 0)
{
return NULL;
}
const int32_t blockSize = JsonAllocator_BlockSize(newSize);
if (JsonAllocator_CanAlloc(allocator, blockSize))
{
void* result = allocator->lowerMarker;
allocator->lowerMarker += blockSize;
return result;
}
return NULL;
}
static void JsonAllocator_FreeUpper(JsonAllocator* allocator, void* buffer, int32_t size)
{
void* lastBuffer = allocator->upperMarker;
if (lastBuffer == buffer)
{
const int32_t blockSize = JsonAllocator_BlockSize(size);
allocator->upperMarker += blockSize;
}
}
static void* JsonAllocator_AllocUpper(JsonAllocator* allocator, void* oldBuffer, int32_t oldSize, int32_t newSize)
{
JsonAllocator_FreeUpper(allocator, oldBuffer, oldSize);
if (newSize <= 0)
{
return NULL;
}
const int32_t blockSize = JsonAllocator_BlockSize(newSize);
if (JsonAllocator_CanAlloc(allocator, blockSize))
{
allocator->upperMarker -= blockSize;
return allocator->upperMarker;
}
return NULL;
}
/*
JsonArray: dynamic, scalable array
@note: internal only
*/
typedef struct JsonArray
{
int32_t size;
int32_t count;
Json buffer[];
} JsonArray;
#define JsonArray_GetHeader(a) ((JsonArray*)(a) - 1)
#define JsonArray_Init() NULL
#define JsonArray_Free(a, alloc) JsonAllocator_FreeUpper(alloc, a ? JsonArray_GetHeader(a) : NULL, JsonArray_GetSize(a) * sizeof((a)[0]))
#define JsonArray_GetSize(a) ((a) ? JsonArray_GetHeader(a)->size : 0)
#define JsonArray_GetCount(a) ((a) ? JsonArray_GetHeader(a)->count : 0)
#define JsonArray_GetAllocMemory(a) (sizeof(JsonArray) + JsonArray_GetSize(a) * sizeof(*(a)))
#define JsonArray_GetUsageMemory(a) (sizeof(JsonArray) + JsonArray_GetCount(a) * sizeof(*(a)))
#define JsonArray_Push(a, v, alloc) (JsonArray_EnsureSize(a, JsonArray_GetCount(a) + 1, alloc) ? ((void)((a)[JsonArray_GetHeader(a)->count++] = v), 1) : 0)
#define JsonArray_Pop(a, v, alloc) ((a)[--JsonArray_GetHeader(a)->count]);
#define JsonArray_EnsureSize(a, n, alloc) ((!(a) || JsonArray_GetSize(a) < (n)) ? (*((void**)&(a))=JsonArray_Grow(a, n + 1, sizeof((a)[0]), alloc)) != NULL : 1)
#define JsonArray_Clear(a) ((a) ? (void)(JsonArray_GetHeader(a)->count = 0) : (void)0)
#define JsonArray_Clone(a, alloc) ((a) ? memcpy(JsonArray_Grow(0, JsonArray_GetCount(a), sizeof((a)[0]), alloc), JsonArray_GetHeader(a), JsonArray_GetUsageMemory(a)) : NULL)
JSON_INLINE void* JsonArray_Grow(void* array, int32_t reqsize, int32_t elemsize, JsonAllocator* allocator)
{
assert(elemsize > 0);
assert(allocator != NULL);
JsonArray* raw = array ? JsonArray_GetHeader(array) : NULL;
int32_t size = JsonArray_GetSize(array);
int32_t count = JsonArray_GetCount(array);
if (size >= reqsize)
{
return array;
}
int32_t newSize = size;
while (newSize < reqsize)
{
newSize += 32;
}
JsonArray* newArray = (JsonArray*)JsonAllocator_AllocUpper(allocator, raw, sizeof(JsonArray) + size * elemsize, sizeof(JsonArray) + newSize * elemsize);
if (newArray)
{
newArray->size = newSize;
newArray->count = count;
if (raw && count > 0)
{
memcpy(newArray->buffer, raw->buffer, count * elemsize);
}
return newArray->buffer;
}
else
{
return NULL;
}
}
/*
JsonTempArray: memory-wise array for containing parsing value
@note: internal only
*/
#define JsonTempArray(T, CAPACITY) \
struct { \
T* array; \
int32_t count; \
T buffer[CAPACITY]; \
}
#define JsonTempArray_Init(a) { a, 0 }
#define JsonTempArray_Free(a, alloc) JsonArray_Free((a)->array, alloc)
#define JsonTempArray_Push(a, v, alloc) ((a)->count >= (int32_t)(sizeof((a)->buffer) / sizeof((a)->buffer[0])) ? JsonArray_Push((a)->array, v, alloc) : ((a)->buffer[(a)->count++] = v, 1))
#define JsonTempArray_GetCount(a) ((a)->count + JsonArray_GetCount((a)->array))
#define JsonTempArray_ToBuffer(a, alloc) JsonTempArray_ToBufferFunc((a)->buffer, (a)->count, (a)->array, (int)sizeof((a)->buffer[0]), alloc)
JSON_INLINE void* JsonTempArray_ToBufferFunc(void* buffer, int32_t count, void* dynamicBuffer, int32_t itemSize, JsonAllocator* allocator)
{
int total = count + JsonArray_GetCount(dynamicBuffer);
if (total > 0)
{
// Aligned total
const int32_t mod = (total * itemSize) & (sizeof(Json) - 1);
const int32_t size = total * itemSize + (mod != 0) * (sizeof(Json) - mod);
void* array = (JsonArray*)JsonAllocator_AllocLower(allocator, NULL, 0, size);
if (array)
{
memcpy(array, buffer, count * itemSize);
if (total > count)
{
memcpy((char*)array + count * itemSize, dynamicBuffer, (total - count) * itemSize);
}
}
return array;
}
return NULL;
}
typedef struct JsonParser JsonParser;
struct JsonParser
{
JsonParseFlags flags;
int32_t line;
int32_t column;
int32_t cursor;
//JsonType parsingType;
int32_t length; /* Reference only */
const char* buffer; /* Reference only */
JsonError errnum;
char* errmsg;
jmp_buf errjmp;
JsonAllocator allocator; /* Runtime allocator */
};
static void JsonParser_SetErrorWithArgs(JsonParser* parser, JsonType type, JsonError code, const char* fmt, va_list valist)
{
const int errmsg_size = 1024;
const char* type_name;
switch (type)
{
case JsonType_Null:
type_name = "null";
break;
case JsonType_Boolean:
type_name = "boolean";
break;
case JsonType_Number:
type_name = "number";
break;
case JsonType_Array:
type_name = "array";
break;
case JsonType_String:
type_name = "string";
break;
case JsonType_Object:
type_name = "object";
break;
default:
type_name = "unknown";
break;
}
parser->errnum = code;
if (parser->errmsg == NULL)
{
parser->errmsg = (char*)JsonAllocator_AllocUpper(&parser->allocator, NULL, 0, errmsg_size);
}
char final_format[1024];
char templ_format[1024] = "%s\n\tAt line %d, column %d. Parsing token: <%s>.";
#if defined(_MSC_VER) && _MSC_VER >= 1200
sprintf_s(final_format, sizeof(final_format), templ_format, fmt, parser->line, parser->column, type_name);
sprintf_s(parser->errmsg, errmsg_size, final_format, valist);
#else
sprintf(final_format, templ_format, fmt, parser->line, parser->column, type_name);
sprintf(parser->errmsg, final_format, valist);
#endif
}
/* @funcdef: JsonParser_SetError */
static void JsonParser_SetError(JsonParser* parser, JsonType type, JsonError code, const char* fmt, ...)
{
va_list varg;
va_start(varg, fmt);
JsonParser_SetErrorWithArgs(parser, type, code, fmt, varg);
va_end(varg);
}
/* funcdef: JsonParser_Panic */
static void JsonParser_Panic(JsonParser* parser, JsonType type, JsonError code, const char* fmt, ...)
{
va_list varg;
va_start(varg, fmt);
JsonParser_SetErrorWithArgs(parser, type, code, fmt, varg);
va_end(varg);
longjmp(parser->errjmp, code);
}
/* @funcdef: JsonParser_Init */
static bool JsonParser_Init(JsonParser* parser, const char* jsonCode, int32_t jsonLength, JsonAllocator allocator, JsonParseFlags flags)
{
JSON_ASSERT(parser, "parser mustnot be null");
parser->flags = flags;
parser->line = 1;
parser->column = 1;
parser->cursor = 0;
parser->buffer = jsonCode;
parser->length = jsonLength;
parser->errmsg = "Success!";
parser->errnum = JsonError_None;
parser->allocator = allocator;
return true;
}
/* @funcdef: JsonParser_IsAtEnd */
static int JsonParser_IsAtEnd(const JsonParser* parser)
{
return parser->cursor >= parser->length || parser->buffer[parser->cursor] <= 0;
}
/* @funcdef: JsonParser_PeekChar */
static int JsonParser_PeekChar(const JsonParser* parser)
{
return parser->buffer[parser->cursor];
}
/* @funcdef: JsonParser_NextChar */
static int JsonParser_NextChar(JsonParser* parser)
{
if (JsonParser_IsAtEnd(parser))
{
return -1;
}
else
{
int c = parser->buffer[++parser->cursor];
if (c == '\n')
{
parser->line++;
parser->column = 1;
}
else
{
parser->column = parser->column + 1;
}
return c;
}
}
/* @funcdef: JsonParser_NextLine */
static int JsonParser_NextLine(JsonParser* parser)
{
if (JsonParser_IsAtEnd(parser))
{
return -1;
}
else
{
int c = parser->buffer[parser->cursor];
while (c != '\n')
{
c = parser->buffer[++parser->cursor];
}
c = parser->buffer[++parser->cursor];
parser->line++;
parser->column = 1;
return c;
}
}
/* @funcdef: JsonParser_SkipSpace */
static int JsonParser_SkipSpace(JsonParser* parser)
{
int c = JsonParser_PeekChar(parser);
while (c > 0 && isspace(c))
{
c = JsonParser_NextChar(parser);
}
return c;
}
/* @funcdef: JsonParser_MatchChar */
static int JsonParser_MatchChar(JsonParser* parser, JsonType type, int c)
{
if (JsonParser_PeekChar(parser) == c)
{
return JsonParser_NextChar(parser);
}
else
{
JsonParser_Panic(parser, type, JsonError_UnmatchToken, "Expected '%c'", (char)c);
return -1;
}
}
/* @funcdef: JsonParser_SkipComments */
static int JsonParser_SkipComments(JsonParser* parser)
{
while (true)
{
int c = JsonParser_NextChar(parser);
if (c == '/')
{
c = JsonParser_NextChar(parser);
if (c == '/')
{
JsonParser_NextLine(parser);
}
else if (c == '*')
{
int c0 = JsonParser_NextChar(parser);
int c1 = JsonParser_NextChar(parser);
while (c0 != '*' || c1 != '/')
{
c0 = c1;
c1 = JsonParser_NextChar(parser);
}
}
else
{
JsonParser_Panic(parser, JsonType_Null, JsonError_UnexpectedToken, "Unexpected token '%c'", c);
}
}
else
{
break;
}
}
return JsonParser_PeekChar(parser);
}
/* All parse functions declaration */
static void JsonParser_ParseArray(JsonParser* parser, Json* outValue);
static void JsonParser_ParseSingle(JsonParser* parser, Json* outValue);
static void JsonParser_ParseObject(JsonParser* parser, Json* outValue);
static void JsonParser_ParseNumber(JsonParser* parser, Json* outValue);
static void JsonParser_ParseString(JsonParser* parser, Json* outValue);
/* @funcdef: JsonParser_ParseNumber */
static void JsonParser_ParseNumber(JsonParser* parser, Json* outValue)
{
int c = JsonParser_SkipSpace(parser);
if (c > 0)
{
int sign = 1;
if (c == '+')
{
c = JsonParser_NextChar(parser);
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "JSON does not support number start with '+'");
}
else if (c == '-')
{
sign = -1;
c = JsonParser_NextChar(parser);
}
else if (c == '0')
{
c = JsonParser_NextChar(parser);
if (!isspace(c) && !ispunct(c))
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "JSON does not support number start with '0' (only standalone '0' is accepted)");
}
}
else if (!isdigit(c))
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Unexpected '%c'", c);
}
int dot = 0;
int exp = 0;
int expsgn = 0;
int exppow = 0;
int expchk = 0;
int numpow = 1;
double number = 0;
while (c > 0)
{
if (c == 'e')
{
if (exp)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Too many 'e' are presented in a <number>");
}
else if (dot && numpow == 1)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken,
"'.' is presented in number token, but require a digit after '.' ('%c')", c);
}
else
{
exp = 1;
expchk = 0;
}
}
else if (c == '.')
{
if (exp)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Cannot has '.' after 'e' is presented in a <number>");
}
else if (dot)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Too many '.' are presented in a <number>");
}
else
{
dot = 1;
}
}
else if (exp && (c == '-' || c == '+'))
{
if (expchk)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "'%c' is presented after digits are presented of exponent part", c);
}
else if (expsgn)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Too many signed characters are presented after 'e'");
}
else
{
expsgn = (c == '-' ? -1 : 1);
}
}
else if (!isdigit(c))
{
break;
}
else
{
if (exp)
{
expchk = 1;
exppow = exppow * 10 + (c - '0');
}
else
{
if (dot)
{
numpow *= 10;
number += (c - '0') / (double)numpow;
}
else
{
number = number * 10 + (c - '0');
}
}
}
c = JsonParser_NextChar(parser);
}
if (exp && !expchk)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "'e' is presented in number token, but require a digit after 'e' ('%c')", (char)c);
}
if (dot && numpow == 1)
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "'.' is presented in number token, but require a digit after '.' ('%c')", (char)c);
}
else
{
if (exp)
{
int i;
double tmp = 1;
for (i = 0; i < exppow; i++)
{
tmp *= 10;
}
if (expsgn < 0)
{
number /= tmp;
}
else
{
number *= tmp;
}
}
Json value;
value.type = JsonType_Number;
value.length = 0;
value.number = sign * number;
*outValue = value;
}
}
else
{
JsonParser_Panic(parser, JsonType_Number, JsonError_UnexpectedToken, "Reached the end of json!");
}
}
/* @funcdef: JsonParser_ParseArray */
static void JsonParser_ParseArray(JsonParser* parser, Json* outValue)
{
if (JsonParser_SkipSpace(parser) > 0)
{
JsonParser_MatchChar(parser, JsonType_Array, '[');
JsonTempArray(Json, 64) values = JsonTempArray_Init(NULL);
while (JsonParser_SkipSpace(parser) > 0 && JsonParser_PeekChar(parser) != ']')
{
if (values.count > 0)
{
JsonParser_MatchChar(parser, JsonType_Array, ',');
}
Json value;
JsonParser_ParseSingle(parser, &value);
JsonTempArray_Push(&values, value, &parser->allocator);
}
JsonParser_SkipSpace(parser);
JsonParser_MatchChar(parser, JsonType_Array, ']');
outValue->type = JsonType_Array;
outValue->length = JsonTempArray_GetCount(&values);
outValue->array = (Json*)JsonTempArray_ToBuffer(&values, &parser->allocator);
JsonTempArray_Free(&values, &parser->allocator);
}
}
/* JsonState_ParseSingle */
static void JsonParser_ParseSingle(JsonParser* parser, Json* outValue)
{
if (JsonParser_SkipSpace(parser) > 0)
{
int c = JsonParser_PeekChar(parser);
switch (c)
{
case '[':
JsonParser_ParseArray(parser, outValue);
break;
case '{':
JsonParser_ParseObject(parser, outValue);
break;
case '"':
JsonParser_ParseString(parser, outValue);
break;
case '+': case '-': case '0':
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
JsonParser_ParseNumber(parser, outValue);
break;
case '/':
if (parser->flags & JsonParseFlags_SupportComment)
{
JsonParser_SkipComments(parser);
JsonParser_ParseSingle(parser, outValue);
}
else
{
JsonParser_Panic(parser, JsonType_String, JsonError_UnknownToken, "Unknown token '%c'", c);
}
break;
default:
{
int length = 0;
while (c > 0 && isalpha(c))
{
length++;
c = JsonParser_NextChar(parser);
}
const char* token = parser->buffer + parser->cursor - length;
if (length == 4 && strncmp(token, "null", length) == 0)
{
*outValue = JSON_NULL;
}
else if (length == 4 && strncmp(token, "true", length) == 0)
{
*outValue = JSON_TRUE;
}
else if (length == 5 && strncmp(token, "false", length) == 0)
{
*outValue = JSON_FALSE;
}
else
{
char tmp[256];
tmp[length] = 0;
while (length--)
{
tmp[length] = token[length];
}
JsonParser_Panic(parser, JsonType_Null, JsonError_UnexpectedToken, "Unexpected token '%s'", tmp);
}
} break;
/* END OF SWITCH STATEMENT */
}
}
}
static char* JsonParser_ParseStringNoToken(JsonParser* parser, int32_t* outLength)
{
JsonParser_MatchChar(parser, JsonType_String, '"');
int32_t i;
int32_t c0, c1;
int32_t length = 0;
JsonTempArray(char, 2048) buffer = JsonTempArray_Init(NULL);
while (!JsonParser_IsAtEnd(parser) && (c0 = JsonParser_PeekChar(parser)) != '"')
{
if (c0 == '\\')
{
c0 = JsonParser_NextChar(parser);
switch (c0)
{
case 'n':
JsonTempArray_Push(&buffer, '\n', &parser->allocator);
length++;
break;
case 't':
JsonTempArray_Push(&buffer, '\t', &parser->allocator);
length++;
break;
case 'r':
JsonTempArray_Push(&buffer, '\r', &parser->allocator);
length++;
break;
case 'b':
JsonTempArray_Push(&buffer, '\b', &parser->allocator);
length++;
break;
case '\\':
JsonTempArray_Push(&buffer, '\\', &parser->allocator);
length++;
break;
case '"':
JsonTempArray_Push(&buffer, '\"', &parser->allocator);
length++;
break;
case 'u':
c1 = 0;
for (i = 0; i < 4; i++)
{
if (isxdigit((c0 = JsonParser_NextChar(parser))))
{
c1 = c1 * 10 + (isdigit(c0) ? c0 - '0' : c0 < 'a' ? c0 - 'A' : c0 - 'a');
}
else
{
JsonParser_Panic(parser, JsonType_String, JsonError_UnknownToken, "Expected hexa character in unicode character");
}
}
if (c1 <= 0x7F)
{
JsonTempArray_Push(&buffer, (char)c1, &parser->allocator);
}
else if (c1 <= 0x7FF)
{
char c2 = (char)(0xC0 | (c1 >> 6)); /* 110xxxxx */