jsonParse

A simple and fast JSON parser in ANSI C.

• Overview
• Build
  • copying the source
  • compile
• Usage
  • Include jsonParse
  • Parse JSON
  • Print JSON
  • Free object
  • Data Structure
• Example
• License
• Enjoy jsonParse

Overview

---

jsonParse implements a reference counting object model that easily construct JSON objects in C.

jsonParse is faster than cJSON and json-c as implements in C.

jsonParse is simple ,only 1600+ lines code.

Build

---

copying the source

You can copy source parse.c and object.c,header parse.h and object.h to your projects source and start using it.

jsonParse is written in ANSI C in order to support as many platforms and compilers as possible.

compile

Use clang or gcc compile share or static library.

for clang example

$ clang -O parse.c object.c -fPIC -shared -o libjsonParse.so

$ clang -c parse.c object.c
$ ar -r libjsonParse.a parse.o object.o

Usage

---

Include jsonParse

#include "parse.h"

Parse JSON

int parseJSON(char *str,int *flag,Object **data);

str: is JSON data.

flag : NULL or 0, is only parse; 1, create C JSON objects ; 2, as 1 but parse ignore the redundant semicolons of arrays and dicts.

data: out C JSON objects.

return: 0,is error; str length , success.

Print JSON

char *object_toString(Object *object);

Free object

void object_free(Object *object);

Data Structure

jsonParse represents JSON data using the object struct :

typedef struct {
	DataType type;
	char _nextFlag;
	int _referNum;

	union {
		int i;
		double d;
	} value;

	void *data;
	void *_data1; 
	void *_data2; 
} Object;

JSON data type:

typedef enum {
	DataType_InValid=0,
	
	DataType_Int,
	DataType_Float,
	DataType_String,

	DataType_True,
	DataType_False,
	DataType_Null,

	DataType_Array,
	DataType_Dict

} DataType;

An item of this type represents a JSON value.

true/false/null is object struct type field determine

Int/Float use object struct value field.

String use object struct data field as char pointer.

Array/Dict use object struct data field as Array/Dict struct.

Example

---

simple data as

	char *str="{\"arr\":[1,\n \r  \"value\",-1.23e1,[{ \"sub\":1 }] ],\"name\":\"希望666\"}";

usage as

	char *printStr=NULL;

	Object *obj=NULL;
	int flag=1;
	int status=0;
	
	// parse
	status=parseJSON(str, &flag, &obj);
	
	// print
	printStr=object_toString(obj);
	
	if(status){
		printf("printStr ==>%s\n", printStr);
	}
	
	// free 
	free(printStr);
	object_free(obj);

test demo

testStr.c is demo example, usage parse/print/free

License

---

MIT License

Copyright (c) 2019 liufei and jsonParse 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.

Enjoy jsonParse

---

It's not perfect, it's just the beginning.

Welcome to contribute to improve the code.

• Although it is cross-platform, it lacks rigorous multi-platform testing.
• The library itself currently supports reading and parsing related operations, but writing related operations are not yet perfect.