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32 lines
1.1 KiB
Objective-C
32 lines
1.1 KiB
Objective-C
// 3 november 2017
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#import "uipriv_darwin.h"
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// functions and constants FROM THE DEPTHS BELOW!
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// note: for constants, dlsym() returns the address of the constant itself, as if we had done &constantName
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// we also provide default values just in case
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// these values come from 10.12.6
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CFStringRef uiprivUNDOC_kCTFontPreferredSubFamilyNameKey = CFSTR("CTFontPreferredSubFamilyName");
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CFStringRef uiprivUNDOC_kCTFontPreferredFamilyNameKey = CFSTR("CTFontPreferredFamilyName");
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// note that we treat any error as "the symbols aren't there" (and don't care if dlclose() failed)
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void uiprivLoadUndocumented(void)
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{
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void *handle;
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CFStringRef *str;
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// dlsym() walks the dependency chain, so opening the current process should be sufficient
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handle = dlopen(NULL, RTLD_LAZY);
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if (handle == NULL)
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return;
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#define GET(var, fn) *((void **) (&var)) = dlsym(handle, #fn)
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GET(str, kCTFontPreferredSubFamilyNameKey);
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NSLog(@"get %p", str);
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if (str != NULL)
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uiprivUNDOC_kCTFontPreferredSubFamilyNameKey = *str;
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GET(str, kCTFontPreferredFamilyNameKey);
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if (str != NULL)
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uiprivUNDOC_kCTFontPreferredFamilyNameKey = *str;
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dlclose(handle);
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}
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