XCode_Snippets_iOS/SourceCode/hmCheckError.m at master · hwsyy/XCode_Snippets_iOS · GitHub

24 lines (21 loc) · 620 Bytes

---

title: "CheckError"

summary: "Function that extracts human-readable information from OSStatus codes."

platform: iOS

completion-scope: Top Level

---

static void CheckError(OSStatus error, const char *operation) {

if (error == noErr) {

return;

}

char str[20];

*(UInt32 *) (str + 1) = CFSwapInt32HostToBig(error);

if (isprint(str[1]) && isprint(str[2]) && isprint(str[3]) && isprint(str[4])) {

str[0] = str[5] = '\'';

str[6] = '\0';

} else {

sprintf(str, "%d", (int)error);

}

fprintf(stderr, "[Error] %s (%s)\n", operation, str);

exit(1);

}

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