/* The "debug" description, used by CFCopyDescription and -[NSObject description].
*/
CFStringRef _CFErrorCreateDebugDescription(CFErrorRef err) {
CFMutableStringRef result = CFStringCreateMutable(
kCFAllocatorSystemDefault, 0);
CFStringAppendFormat(
result, NULL,
CFSTR("Error Domain=%@ Code=%d"),
CFErrorGetDomain(err), (int)CFErrorGetCode(err));
CFDictionaryRef userInfo = _CFErrorGetUserInfo(err);
if (userInfo) {
CFStringAppendFormat(result, NULL, CFSTR(" UserInfo=%p"), userInfo);
}
CFStringRef desc = CFErrorCopyDescription(err);
if (desc) {
CFStringAppendFormat(result, NULL, CFSTR(" \"%@\""), desc);
CFRelease(desc);
}
CFStringRef debugDesc = _CFErrorCopyUserInfoKey(err, kCFErrorDebugDescriptionKey);
if (debugDesc) {
if (CFStringGetLength(debugDesc) > 0) {
CFStringAppendFormat(result, NULL, CFSTR(" (%@)"), debugDesc);
}
CFRelease(debugDesc);
}
return result;
}
/* This function retrieves the value of the specified key from the userInfo, or from the callback. It works with a CF or NSError.
*/
static CFStringRef _CFErrorCopyUserInfoKey(CFErrorRef err, CFStringRef key) {
CFStringRef result = NULL;
// First consult the userInfo dictionary
CFDictionaryRef userInfo = _CFErrorGetUserInfo(err);
if (userInfo) result = (CFStringRef)CFDictionaryGetValue(userInfo, key);
// If that doesn't work, consult the callback
if (result) {
CFRetain(result);
} else {
CFErrorUserInfoKeyCallBack callBack = CFErrorGetCallBackForDomain(CFErrorGetDomain(err));
if (callBack) result = (CFStringRef)callBack(err, key);
}
return result;
}
CFStringRef _CFErrorCreateDebugDescription(CFErrorRef err) {
CFStringRef desc = CFErrorCopyDescription(err);
CFStringRef debugDesc = _CFErrorCopyUserInfoKey(err, kCFErrorDebugDescriptionKey);
CFDictionaryRef userInfo = _CFErrorGetUserInfo(err);
CFMutableStringRef result = CFStringCreateMutable(kCFAllocatorSystemDefault, 0);
CFStringAppendFormat(result, NULL, CFSTR("Error Domain=%@ Code=%d"), CFErrorGetDomain(err), (long)CFErrorGetCode(err));
CFStringAppendFormat(result, NULL, CFSTR(" \"%@\""), desc);
if (debugDesc && CFStringGetLength(debugDesc) > 0) CFStringAppendFormat(result, NULL, CFSTR(" (%@)"), debugDesc);
if (userInfo) {
CFStringAppendFormat(result, NULL, CFSTR(" UserInfo=%p {"), userInfo);
CFDictionaryApplyFunction(userInfo, userInfoKeyValueShow, (void *)result);
CFIndex commaLength = (CFStringHasSuffix(result, CFSTR(", "))) ? 2 : 0;
CFStringReplace(result, CFRangeMake(CFStringGetLength(result)-commaLength, commaLength), CFSTR("}"));
}
if (debugDesc) CFRelease(debugDesc);
if (desc) CFRelease(desc);
return result;
}
/* This accessor never returns NULL. For usage inside this file, consider __CFErrorGetUserInfo().
*/
CFDictionaryRef CFErrorCopyUserInfo(CFErrorRef err) {
CFDictionaryRef userInfo = _CFErrorGetUserInfo(err);
return userInfo ? (CFDictionaryRef)CFRetain(userInfo) : _CFErrorCreateEmptyDictionary(CFGetAllocator(err));
}