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    <p>I believe that you're looking for <a href="http://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Miscellaneous/Foundation_Functions/Reference/reference.html#//apple_ref/c/func/NSGetSizeAndAlignment" rel="nofollow"><code>NSGetSizeAndAlignment</code></a>:</p> <blockquote> <p>Obtains the actual size and the aligned size of an encoded type.</p> <pre><code>const char * NSGetSizeAndAlignment ( const char *typePtr, NSUInteger *sizep, NSUInteger *alignp );</code></pre> <p><strong>Discussion</strong><br> Obtains the actual size and the aligned size of the first data type represented by <code>typePtr</code> and returns a pointer to the position of the next data type in <code>typePtr</code>.</p> </blockquote> <p>This is a Foundation function, not part of the base runtime, which is probably why you didn't find it.</p> <p><em><strong>UPDATE:</em></strong> Although you didn't initially mention that you're using Cocotron, it is also available there. You can find it in Cocotron's Foundation, in <a href="http://code.google.com/p/cocotron/source/browse/Foundation/NSObjCRuntime.m" rel="nofollow">NSObjCRuntime.m</a>.</p> <p>Obviously, this is much better than rolling your own, since you can trust it to always correctly handle strings generated by its own runtime in the unlikely event that the encoding characters should change. </p> <p>For some reason, however, it's unable to handle the digit elements of a method signature string (which presumably have something to do with offsets in memory). <a href="https://github.com/mikeash/MABlockClosure/blob/master/MABlockClosure.m" rel="nofollow">This improved version, by Mike Ash</a> will do so:</p> <pre><code>static const char *SizeAndAlignment(const char *str, NSUInteger *sizep, NSUInteger *alignp, int *len) { const char *out = NSGetSizeAndAlignment(str, sizep, alignp); if(len) *len = out - str; while(isdigit(*out)) out++; return out; } </code></pre>
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    1. POHow to interpret objective-c type specifier (e.g. returned by method_copyReturnType())?
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    1. USJosh Caswell
    1. USJosh Caswell
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    1. CO+1 good find, Josh
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      1. USjustin
    2. COThe problem is, that I do not have general access to the Apple Foundation since it only exists for Apple products :). The project I am working on is Cocotron (an alternative to the Foundation). So I can't use Foundation methods.
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      1. USTilo Prütz
    3. CO@Tilo: The framework you're using is a **pretty big condition** that you probably should've included in your question to start with. The same function is, however, available in Cococtron. See my edit.
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