RegexKit is an Objective-C framework for regular expressions:
Support for Mac OS X Cocoa and GNUstep. Mac OS X 10.4 or later required.
Mac OS X Universal Binary, including 64-bit support on Mac OS X 10.5.
No sub-classing required. Seamlessly adds regular expression support to all NSArray, NSDictionary, NSSet, and NSString Foundation objects with a rich set of Objective-C category additions.
Unicode enabled. Full Unicode support for NSString objects.
Extensive, high quality documentation.
Full source code with a BSD license.
Uses the BSD licensed PCRE Perl Compatible Regular Expressions library for the regular expression engine.
Tuned for high performance, including such features as:
Caches the compiled form of the regular expression for speed.
Multithreading safe, including multiple reader, single writer multithreaded access to the compiled regular expression cache.
Makes minimal use of heap storage (ie, malloc() and free()), instead allocating most temporary buffer needs dynamically from the stack.
Uses Core Foundation directly on Mac OS X for additional speed.
Includes support for Mac OS X 10.5 Leopard:
64 bit support. Pre-built for ppc, ppc64, i386, and x86_64.
Garbage Collection enabled. Complete support for Leopards Garbage Collection feature.
Integrated Xcode 3.0 documentation. Get real time API information via the Research Assistant.
Collection of instruments for Instruments.app.
RegexKit specific DTrace probe points.
What's new in RegexKit
Version 0.6: Upgraded to PCRE 7.6, which includes an important security related bug fix, preliminary support for internationalization, returning NSError objects, and the ability to evaluate multiple regular expressions in a collection concurrently on multiple threads, one per CPU.