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POHow do I use precomposedStringWithCanonicalMapping with CFStringref in plain C
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  1. POHow do I use precomposedStringWithCanonicalMapping with CFStringref in plain C
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    copied!<p>I need to parse the defaults database for Recent files, in Mac Os X. This is done with sed. The caveat is that the filenames are stored in decomposed utf-16 inside there.</p> <p>So, I thought, (after having being pointed to the NSString functions) "why don't I just make a little tool that takes care of it".</p> <p>The tool is supposed to work basically like cat, it gets lines from input, it converts each line into a CFStringref object, before the CFStringref <strong>hopefully</strong> gets converted into precomposed UTF-16, I convert that back to UTF-8, and prints it.</p> <p>I hate to say it, but I don't know this "toll-free bridging" works, I have no intention to use Cocoa and Objective C for this, I just want a straight solution using CFStringref, that is, if such a solution exists!</p> <p>Thanks!</p> <p>Here is what I have got so far:</p> <pre><code>#define BUFFERSIZE 512 static void precomposedOutput( char *fn ) { char buffer[BUFFERSIZE] ; CFStringRef str ; char *outbuf; char *bytes ; FILE *fd = stdin ; if (fn) { fd = fopen(fn,"r"); } while ( fgets(buffer, sizeof(buffer),fd ) ) { bytes = savestr(buffer) ; str = CFStringCreateWithCStringNoCopy(NULL, bytes,kCFStringEncodingUTF8, NULL); /* CONVERSION INTO PRECOMPOSED IS SUPPOSED TO HAPPEN HERE */ outbuf = Copy_CFStringRefToCString(str) ; CFRelease(str) ; fputs(outbuf,stdout) ; free(outbuf) ; } } </code></pre> <p>This appears to work, so far in converting back and forth, (not run <strong>leaks</strong> on it.) What I need help with, is to convert the CFString into precomposed UTF-16.</p> <p>Thanks!</p>
 

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