Immediate Mode JSON Serialization Library in C. Similar to imgui but for generating JSON.
#include <stdio.h> #define JIM_IMPLEMENTATION #include "./jim.h" int main() { Jim jim = { .sink = stdout, .write = (Jim_Write) fwrite, }; jim_object_begin(&jim); jim_member_key(&jim, "null"); jim_null(&jim); jim_member_key(&jim, "bool"); jim_array_begin(&jim); jim_bool(&jim, 0); jim_bool(&jim, 1); jim_array_end(&jim); jim_member_key(&jim, "integers"); jim_array_begin(&jim); for (int i = -3; i <= 3; ++i) { jim_integer(&jim, i); } jim_array_end(&jim); jim_member_key(&jim, "floats"); jim_array_begin(&jim); jim_float(&jim, 0.0, 4); jim_float(&jim, -0.0, 4); jim_float(&jim, 3.1415, 4); jim_float(&jim, 2.71828, 5); jim_float(&jim, 1.6180, 4); jim_float(&jim, 0.0 / 0.0, 4); jim_float(&jim, 1.0 / 0.0, 4); jim_float(&jim, -1.0 / 0.0, 4); jim_array_end(&jim); jim_member_key(&jim, "string"); jim_array_begin(&jim); jim_string(&jim, "Hello\tWorld\n"); jim_string_sized(&jim, "\0\0\0\0", 4); jim_array_end(&jim); jim_object_end(&jim); if (jim.error != JIM_OK) { fprintf(stderr, "ERROR: could not serialize json properly: %s\n", jim_error_string(jim.error)); return -1; } return 0; }$ cc -o example example.c $ ./example | jq . { "null": null, "bool": [ false, true ], "integers": [ -3, -2, -1, 0, 1, 2, 3 ], "floats": [ 3.1415, 2.71828, 1.618 ], "string": [ "Hello\tWorld\n", "\u0000\u0000\u0000\u0000" ] }$ make $ ./testThe expected outputs of the test cases are stored in ./test_expected.h. To regenerate it just run:
$ ./test record- Does not depends on libc. Could be theoretically used in embedded, but I know nothing about embedded, so maybe not.
jim_float()is quite likely very stupid and imprecise