d0n3val / stb_json Goto Github PK

STB_JSON is a header only json parser that aims for a simple interface and integration in the spirit of the STB header only utils

Just include "stb_json.h" in your code and you should be good to go
Alternative, a C++ wrapper class is provided "stb_json.hpp"

Pros:
- Small ( <1K lines code)
- Pure C code without any dependency
- Does not allocate any memory at all
- Simple, just 12 functions

Cons:
- Not useful for strict parsing
- Cannot read exponents in floating point numbers
- Cannot read hex in strings
- Does not open files or holds memory for you
- Does not write json files, only read

Example of use:

	char buffer0[] = "{\"name\": \"John\", \"married\": true, \"height\": 181.55, \"eye colors\": [3,3] }";

	stbj_cursor cursor = stbj_load_buffer(buffer0, strlen(buffer0) + 1);

	if (stbj_any_error(&cursor))
	{
		printf("Error loading JSON buffer %s", stbj_get_last_error(&cursor));
	}
	else
	{
		printf("Found %i values at current cursor\n", stbj_count_values(&cursor));

		char buf[10];
		stbj_read_string_name(&cursor, "name", buf, 10, "not found");
		printf("Name: %s\n", buf);

		if (stbj_read_int_name(&cursor, "married", 0))
			printf("... is married\n");
		else
			printf("... is not married\n");

		printf("Height is: %0.3f\n", stbj_read_double_name(&cursor, "height", 0.0));
		printf("Weight is: %0.3f\n", stbj_read_double_name(&cursor, "weight", 0.0)); // does not exist

		stbj_cursor cursor_eyes = stbj_move_cursor_name(&cursor, "eye colors");
		int left_eye = stbj_read_int_index(&cursor_eyes, 0, -1);
		int right_eye = stbj_read_int_index(&cursor_eyes, 1, -1);

		printf("Eyes: %i - %i\n", left_eye, right_eye);
	}

Output:

Found 4 values at current cursor
Name: John
... is married
Height is: 181.550
Weight is: 0.000
Eyes: 3 - 3