mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-11-14 00:10:39 +00:00
353 lines
9.9 KiB
C
353 lines
9.9 KiB
C
/*
|
|
===========================================================================
|
|
Copyright (C) 2016 James Canete
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
===========================================================================
|
|
*/
|
|
|
|
#ifndef JSON_H
|
|
#define JSON_H
|
|
|
|
enum
|
|
{
|
|
JSONTYPE_STRING, // string
|
|
JSONTYPE_OBJECT, // object
|
|
JSONTYPE_ARRAY, // array
|
|
JSONTYPE_VALUE, // number, true, false, or null
|
|
JSONTYPE_ERROR // out of data
|
|
};
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Array Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
// Get pointer to first value in array
|
|
// When given pointer to an array, returns pointer to the first
|
|
// returns NULL if array is empty or not an array.
|
|
const char *JSON_ArrayGetFirstValue(const char *json, const char *jsonEnd);
|
|
|
|
// Get pointer to next value in array
|
|
// When given pointer to a value, returns pointer to the next value
|
|
// returns NULL when no next value.
|
|
const char *JSON_ArrayGetNextValue(const char *json, const char *jsonEnd);
|
|
|
|
// Get pointers to values in an array
|
|
// returns 0 if not an array, array is empty, or out of data
|
|
// returns number of values in the array and copies into index if successful
|
|
unsigned int JSON_ArrayGetIndex(const char *json, const char *jsonEnd, const char **indexes, unsigned int numIndexes);
|
|
|
|
// Get pointer to indexed value from array
|
|
// returns NULL if not an array, no index, or out of data
|
|
const char *JSON_ArrayGetValue(const char *json, const char *jsonEnd, unsigned int index);
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Object Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
// Get pointer to named value from object
|
|
// returns NULL if not an object, name not found, or out of data
|
|
const char *JSON_ObjectGetNamedValue(const char *json, const char *jsonEnd, const char *name);
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Value Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
// Get type of value
|
|
// returns JSONTYPE_ERROR if out of data
|
|
unsigned int JSON_ValueGetType(const char *json, const char *jsonEnd);
|
|
|
|
// Get value as string
|
|
// returns 0 if out of data
|
|
// returns length and copies into string if successful, including terminating nul.
|
|
// string values are stripped of enclosing quotes but not escaped
|
|
unsigned int JSON_ValueGetString(const char *json, const char *jsonEnd, char *outString, unsigned int stringLen);
|
|
|
|
// Get value as appropriate type
|
|
// returns 0 if value is false, value is null, or out of data
|
|
// returns 1 if value is true
|
|
// returns value otherwise
|
|
double JSON_ValueGetDouble(const char *json, const char *jsonEnd);
|
|
float JSON_ValueGetFloat(const char *json, const char *jsonEnd);
|
|
int JSON_ValueGetInt(const char *json, const char *jsonEnd);
|
|
|
|
#endif
|
|
|
|
#ifdef JSON_IMPLEMENTATION
|
|
#include <stdio.h>
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Internal Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
static const char *JSON_SkipSeparators(const char *json, const char *jsonEnd);
|
|
static const char *JSON_SkipString(const char *json, const char *jsonEnd);
|
|
static const char *JSON_SkipStruct(const char *json, const char *jsonEnd);
|
|
static const char *JSON_SkipValue(const char *json, const char *jsonEnd);
|
|
static const char *JSON_SkipValueAndSeparators(const char *json, const char *jsonEnd);
|
|
|
|
#define IS_SEPARATOR(x) ((x) == ' ' || (x) == '\t' || (x) == '\n' || (x) == '\r' || (x) == ',' || (x) == ':')
|
|
#define IS_STRUCT_OPEN(x) ((x) == '{' || (x) == '[')
|
|
#define IS_STRUCT_CLOSE(x) ((x) == '}' || (x) == ']')
|
|
|
|
static const char *JSON_SkipSeparators(const char *json, const char *jsonEnd)
|
|
{
|
|
while (json < jsonEnd && IS_SEPARATOR(*json))
|
|
json++;
|
|
|
|
return json;
|
|
}
|
|
|
|
static const char *JSON_SkipString(const char *json, const char *jsonEnd)
|
|
{
|
|
for (json++; json < jsonEnd && *json != '"'; json++)
|
|
if (*json == '\\')
|
|
json++;
|
|
|
|
return (json + 1 > jsonEnd) ? jsonEnd : json + 1;
|
|
}
|
|
|
|
static const char *JSON_SkipStruct(const char *json, const char *jsonEnd)
|
|
{
|
|
json = JSON_SkipSeparators(json + 1, jsonEnd);
|
|
while (json < jsonEnd && !IS_STRUCT_CLOSE(*json))
|
|
json = JSON_SkipValueAndSeparators(json, jsonEnd);
|
|
|
|
return (json + 1 > jsonEnd) ? jsonEnd : json + 1;
|
|
}
|
|
|
|
static const char *JSON_SkipValue(const char *json, const char *jsonEnd)
|
|
{
|
|
if (json >= jsonEnd)
|
|
return jsonEnd;
|
|
else if (*json == '"')
|
|
json = JSON_SkipString(json, jsonEnd);
|
|
else if (IS_STRUCT_OPEN(*json))
|
|
json = JSON_SkipStruct(json, jsonEnd);
|
|
else
|
|
{
|
|
while (json < jsonEnd && !IS_SEPARATOR(*json) && !IS_STRUCT_CLOSE(*json))
|
|
json++;
|
|
}
|
|
|
|
return json;
|
|
}
|
|
|
|
static const char *JSON_SkipValueAndSeparators(const char *json, const char *jsonEnd)
|
|
{
|
|
json = JSON_SkipValue(json, jsonEnd);
|
|
return JSON_SkipSeparators(json, jsonEnd);
|
|
}
|
|
|
|
// returns 0 if value requires more parsing, 1 if no more data/false/null, 2 if true
|
|
static unsigned int JSON_NoParse(const char *json, const char *jsonEnd)
|
|
{
|
|
if (!json || json >= jsonEnd || *json == 'f' || *json == 'n')
|
|
return 1;
|
|
|
|
if (*json == 't')
|
|
return 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Array Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
const char *JSON_ArrayGetFirstValue(const char *json, const char *jsonEnd)
|
|
{
|
|
if (!json || json >= jsonEnd || !IS_STRUCT_OPEN(*json))
|
|
return NULL;
|
|
|
|
json = JSON_SkipSeparators(json + 1, jsonEnd);
|
|
|
|
return (json >= jsonEnd || IS_STRUCT_CLOSE(*json)) ? NULL : json;
|
|
}
|
|
|
|
const char *JSON_ArrayGetNextValue(const char *json, const char *jsonEnd)
|
|
{
|
|
if (!json || json >= jsonEnd || IS_STRUCT_CLOSE(*json))
|
|
return NULL;
|
|
|
|
json = JSON_SkipValueAndSeparators(json, jsonEnd);
|
|
|
|
return (json >= jsonEnd || IS_STRUCT_CLOSE(*json)) ? NULL : json;
|
|
}
|
|
|
|
unsigned int JSON_ArrayGetIndex(const char *json, const char *jsonEnd, const char **indexes, unsigned int numIndexes)
|
|
{
|
|
unsigned int length = 0;
|
|
|
|
for (json = JSON_ArrayGetFirstValue(json, jsonEnd); json; json = JSON_ArrayGetNextValue(json, jsonEnd))
|
|
{
|
|
if (indexes && numIndexes)
|
|
{
|
|
*indexes++ = json;
|
|
numIndexes--;
|
|
}
|
|
length++;
|
|
}
|
|
|
|
return length;
|
|
}
|
|
|
|
const char *JSON_ArrayGetValue(const char *json, const char *jsonEnd, unsigned int index)
|
|
{
|
|
for (json = JSON_ArrayGetFirstValue(json, jsonEnd); json && index; json = JSON_ArrayGetNextValue(json, jsonEnd))
|
|
index--;
|
|
|
|
return json;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Object Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
const char *JSON_ObjectGetNamedValue(const char *json, const char *jsonEnd, const char *name)
|
|
{
|
|
unsigned int nameLen = strlen(name);
|
|
|
|
for (json = JSON_ArrayGetFirstValue(json, jsonEnd); json; json = JSON_ArrayGetNextValue(json, jsonEnd))
|
|
{
|
|
if (*json == '"')
|
|
{
|
|
const char *thisNameStart, *thisNameEnd;
|
|
|
|
thisNameStart = json + 1;
|
|
json = JSON_SkipString(json, jsonEnd);
|
|
thisNameEnd = json - 1;
|
|
json = JSON_SkipSeparators(json, jsonEnd);
|
|
|
|
if ((unsigned int)(thisNameEnd - thisNameStart) == nameLen)
|
|
if (strncmp(thisNameStart, name, nameLen) == 0)
|
|
return json;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Value Functions
|
|
// --------------------------------------------------------------------------
|
|
|
|
unsigned int JSON_ValueGetType(const char *json, const char *jsonEnd)
|
|
{
|
|
if (!json || json >= jsonEnd)
|
|
return JSONTYPE_ERROR;
|
|
else if (*json == '"')
|
|
return JSONTYPE_STRING;
|
|
else if (*json == '{')
|
|
return JSONTYPE_OBJECT;
|
|
else if (*json == '[')
|
|
return JSONTYPE_ARRAY;
|
|
|
|
return JSONTYPE_VALUE;
|
|
}
|
|
|
|
unsigned int JSON_ValueGetString(const char *json, const char *jsonEnd, char *outString, unsigned int stringLen)
|
|
{
|
|
const char *stringEnd, *stringStart;
|
|
|
|
if (!json)
|
|
{
|
|
*outString = '\0';
|
|
return 0;
|
|
}
|
|
|
|
stringStart = json;
|
|
stringEnd = JSON_SkipValue(stringStart, jsonEnd);
|
|
if (stringEnd >= jsonEnd)
|
|
{
|
|
*outString = '\0';
|
|
return 0;
|
|
}
|
|
|
|
// skip enclosing quotes if they exist
|
|
if (*stringStart == '"')
|
|
stringStart++;
|
|
|
|
if (*(stringEnd - 1) == '"')
|
|
stringEnd--;
|
|
|
|
stringLen--;
|
|
if (stringLen > stringEnd - stringStart)
|
|
stringLen = stringEnd - stringStart;
|
|
|
|
json = stringStart;
|
|
while (stringLen--)
|
|
*outString++ = *json++;
|
|
*outString = '\0';
|
|
|
|
return stringEnd - stringStart;
|
|
}
|
|
|
|
double JSON_ValueGetDouble(const char *json, const char *jsonEnd)
|
|
{
|
|
char cValue[256];
|
|
double dValue = 0.0;
|
|
unsigned int np = JSON_NoParse(json, jsonEnd);
|
|
|
|
if (np)
|
|
return (double)(np - 1);
|
|
|
|
if (!JSON_ValueGetString(json, jsonEnd, cValue, 256))
|
|
return 0.0;
|
|
|
|
sscanf(cValue, "%lf", &dValue);
|
|
|
|
return dValue;
|
|
}
|
|
|
|
float JSON_ValueGetFloat(const char *json, const char *jsonEnd)
|
|
{
|
|
char cValue[256];
|
|
float fValue = 0.0f;
|
|
unsigned int np = JSON_NoParse(json, jsonEnd);
|
|
|
|
if (np)
|
|
return (float)(np - 1);
|
|
|
|
if (!JSON_ValueGetString(json, jsonEnd, cValue, 256))
|
|
return 0.0f;
|
|
|
|
sscanf(cValue, "%f", &fValue);
|
|
|
|
return fValue;
|
|
}
|
|
|
|
int JSON_ValueGetInt(const char *json, const char *jsonEnd)
|
|
{
|
|
char cValue[256];
|
|
int iValue = 0;
|
|
unsigned int np = JSON_NoParse(json, jsonEnd);
|
|
|
|
if (np)
|
|
return np - 1;
|
|
|
|
if (!JSON_ValueGetString(json, jsonEnd, cValue, 256))
|
|
return 0;
|
|
|
|
sscanf(cValue, "%d", &iValue);
|
|
|
|
return iValue;
|
|
}
|
|
|
|
#undef IS_SEPARATOR
|
|
#undef IS_STRUCT_OPEN
|
|
#undef IS_STRUCT_CLOSE
|
|
|
|
#endif
|