Awesome

CoreJSON Framework

CoreJSON is iOS and OSX Core Foundation based fast parser and generator based on libyajl C library.

Comparison with other JSON frameworks:

Tests performed with https://github.com/samsoffes/json-benchmarks

Usage

Parsing in Objective-C:

NSError *error = nil;
id object = (id)JSONCreateWithString(NULL, (CFStringRef)@"[foo, bar]", kJSONReadOptionsDefault, (CFErrorRef *)&error);
if (object) {
  // Do something with object (NSArray)
  [object release];
}

Parsing in C:

CFErrorRef error = NULL;
CFTypeRef object = JSONCreateWithString(NULL, CFSTR("[foo, bar]"), kJSONReadOptionsDefault, &error);
if (object) {
  // Do something with object
  CFRelease(object);
}

Generating in Objective-C:

NSArray *array = [NSArray arrayWithObjects: @"foo", @"bar", nil];
NSError *error = nil;
NSString *json = (id)JSONCreateString(NULL, array, kJSONWriteOptionsDefault, (CFErrorRef *)&error);
if (json) {
  // Do something with json string
  [json release];
}
[array release];

Generating in C:

CFTypeRef values[] = { CFSTR("foo"), CFSTR("bar") };
CFArrayRef array = CFArrayCreateMutable(NULL, values, 2, &kCFTypeArrayCallBacks);
CFErrorRef error = NULL;
CFStringRef json = JSONCreateString(NULL, array, kJSONWriteOptionsDefault, &error);
if (json) {
  // Do something with json string
  CFRelease(json);
}
CFRelease(array);

You should also take care of error object

Options

JSONReadOptions:

• kJSONReadOptionCheckUTF8 = 1 -- Check UTF8 strings
• kJSONReadOptionAllowComments = 2 -- Allow /* comments */
• kJSONReadOptionsDefault = 0 -- Default options (don't check UTF8 strings and do not allow comments)
• kJSONReadOptionsCheckUTF8AndAllowComments = 3 -- Check UTF8 strings and allow comments

JSONWriteOptions:

• kJSONWriteOptionIndent = 1 -- Indent generated JSON string
• kJSONWriteOptionsDefault = 0 -- Default options (do not indent JSON string)

Using in your projects

There are just 2 files CoreJSON.h and CoreJSON.c you'll need together with libyajl.

For your own (non Mac AppStore) OSX projects the quick way is to:

1. brew install yajl
2. add /usr/local/lib to Library Search Path and /usr/local/include to Header Search Path
3. Just drop CoreJSON.h and CoreJSON.c to your project and have fun

For OSX and iOS (Mac AppStore/AppStore) projects you need to include libyajl and drop CoreJSON.h and CoreJSON.c files to your project. One way to do it:

1. Go to your project's directory (for which you're using git, right? ;) and git submodule add git://github.com/mirek/CoreJSON.git CoreJSON
2. From Xcode add CoreJSON.h and CoreJSON.c files to your project
3. If you're already using libyajl in your project, you are good to go. If not, add libyajl files

License

The MIT License

Copyright 2011 Mirek Rusin <mirek [at] me [dot] com>
               http://github.com/mirek/CoreJSON

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.