json

Pure C json serialization library. For the complete API refer to the json.h. Here is a couple of basic exapmles.

Deserializing

const int kErrorBufSize = 1024;
int retCode;
int len;
struct JsonVal val;
struct JsonVal *inner;
char errBuf[kErrorBufSize];

const char *rawSource = "{\"myObj\": {\"myKey1\": 123.98, \"myKey2\": [{\"myKey4\":true}, 5]}}";

val = jsonParseString(rawSource, errBuf, kErrorBufSize);

if (*errBuf != 0) // Parsing failed
{
    fprintf(stderr, "%s\n", errBuf);
    JsonVal_destroy(&val);
    return;
}

inner = JsonVal_getObjectValueByKey(&val, "myObj");
assert(JsonVal_isObject(inner) == 1);

inner = JsonVal_getObjectValueByKey(inner, "myKey2");
assert(JsonVal_isArray(inner) == 1);

void JsonVal_forEachArrayElement(inner, NULL, &workWithArrayElem);

JsonVal_destroy(&val);

Serializing

struct JsonVal top;
struct JsonVal *subArray;
struct JsonVal *subArrayObj;
char out[1024];

top = jsonCreateObject();
JsonVal_objectAddString(&top, "key1", "string1");
JsonVal_objectAddObject(&top, "key2");

subArray = JsonVal_objectAddArray(JsonVal_getObjectValueByKey(&top, "key2"), "subKey1");

JsonVal_arrayAddNumber(subArray, 42);
JsonVal_arrayAddTrue(subArray);
JsonVal_arrayAddFalse(subArray);

subArrayObj = JsonVal_arrayAddObject(subArray);
JsonVal_objectAddNull(subArrayObj, "nullKey");

JsonVal_writeString(&top, out, 1024);

assert(strcmp(out, "{\"key1\":\"string1\",\"key2\":{\"subKey1\":[42,true,false,{\"nullKey\":null}]}}") == 0);

JsonVal_destroy(&top);