cf-jsmn

[](https://travis-ci.org/Micha Mazaheri/cf-jsmn)

A Core Foundation compatible version of the awesome lightweight JSON parser jsmn, with support for unicode strings.

Installation

cf-jsmn is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "cf-jsmn"

Example

// init the jsmn parser
jsmn_parser parser;
jsmn_init(&parser);
unsigned int numTokens = 65536; // an arbitrary size to start with
jsmntok_t* tokens = malloc(sizeof(jsmntok_t) * numTokens);

// get an "inline buffer" of UniChar from the CFString
CFIndex length = CFStringGetLength((__bridge CFStringRef)string);
CFStringInlineBuffer inlineBuffer;
CFStringInitInlineBuffer((__bridge CFStringRef)string, &inlineBuffer, CFRangeMake(0, length));

// loop until we have the right amount of tokens
while (YES) {

  // Parse
  jsmnerr_t error = jsmn_parse(&parser, &inlineBuffer, length, tokens, numTokens);

  // In no error, we're good
  if (error == JSMN_SUCCESS) {
    break;
  }
  // If not enough memory, realloc twice bigger
  else if (error == JSMN_ERROR_NOMEM) {
    numTokens *= 2;
    tokens = realloc(tokens, sizeof(jsmntok_t) * numTokens);
  }
  // If another error, fail
  else {
    // fail gracefully...
    break;
  }
}

// Loop over tokens
for (unsigned int i = 0; i < parser.toknext; i++) {

  int tk_start = tokens[i].start;
  int tk_end = tokens[i].end;
  NSRange range = NSMakeRange(tk_start, tk_end - tk_start);

  switch (tokens[i].type) {
    case JSMN_PRIMITIVE:
      break;
    case JSMN_STRING:
      break;
    case JSMN_OBJECT:
      break;
    case JSMN_ARRAY:
      break;
  }
}

License

This software is distributed under MIT license, so feel free to integrate it in your commercial products.