NSLog Override

PXPLog.h

#import <Foundation/Foundation.h>

#ifdef DEBUG
#define NSLog(args...) PXPLog(__FILE__,__LINE__,__PRETTY_FUNCTION__,args);
#else
#define NSLog(...)
#endif

void PXPLog(const char *file, int lineNumber, const char *functionName, NSString *format, ...);

PXPLog.m

#import "PXPLog.h"
#import <stdio.h>
#import <stdlib.h>
#import <sys/time.h>
#import <time.h>
#import <pthread.h>

void PXPLog(const char *file, int lineNumber, const char *functionName, NSString *format, ...)
{
	// Arguments.
	va_list args;
	va_start(args, format);
	if (![format hasSuffix:@"\n"]) {
		format = [format stringByAppendingString:@"\n"];
	}

	// Message.
	NSString *message = [[NSString alloc] initWithFormat:format arguments:args];
	va_end(args);

	// System.
	int processID = [NSProcessInfo processInfo].processIdentifier;
	mach_port_t threadID = pthread_mach_thread_np(pthread_self());

	// Names.
	NSString *appName = [NSProcessInfo processInfo].processName;
	NSString *fileName = [NSString stringWithUTF8String:file].lastPathComponent;

	// Timestamp.
	char timestamp[24];
	time_t ltime;
	struct tm *tm;
	static struct timeval tv;
	static struct timezone tz;
	time(&ltime);
	tm = (struct tm *)localtime(&ltime);
	gettimeofday(&tv, &tz);
	strftime(timestamp, sizeof(timestamp), "%Y-%m-%d %H:%M:%S", tm);
	snprintf(timestamp, sizeof(timestamp), "%s.%03d", timestamp, tv.tv_usec);

	// Log.
	fprintf(stderr, "%s %s[%d:%d] <%s:%d> %s", timestamp, appName.UTF8String, processID, threadID, fileName.UTF8String, lineNumber, message.UTF8String);
}