OSStatus.m

#import <CoreFoundation/CoreFoundation.h>
#import <Foundation/Foundation.h>

NSString *NSStringFromOSStatus(OSStatus errCode)
{
    if (errCode == noErr)
        return @"noErr";
    char message[5] = {0};
    *(UInt32*) message = CFSwapInt32HostToBig(errCode);
    return [NSString stringWithCString:message encoding:NSASCIIStringEncoding];
}

int main(int argc, const char *argv[]) {
    NSLog(@"error stirng %@", NSStringFromOSStatus(560557684));
    return 0;
}


// compile
// clang -Wall -framework Foundation -framework CoreFoundation convert_osstatus.m -o convert_osstatus