ExtendNSLogFunctionality.m

/*
 ExtendNSLogFunctionality > ExtendNSLogFunctionality.m
 
 Created by David Brooks on 5/14/14.
 Copyright (c) 2014 David J Brooks. All rights reserved.
 
 The MIT License (MIT)
 
 Copyright (c) 2014 David J Brooks
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */

#import "ExtendNSLogFunctionality.h"

void ExtendNSLog(const char *file, int lineNumber, const char *functionName, NSString *format, ...)
{
    // Type to hold information about variable arguments.
    va_list ap;
    
    // Initialize a variable argument list.
    va_start(ap, format);
    
    // NSLog only adds a newline to the end of the NSLog format if
    // one is not already there.
    // Here we are utilizing this feature of NSLog()
    if (![format hasSuffix: @"\n"]) {
        format = [format stringByAppendingString: @"\n"];
    }
    
    NSString *body = [[NSString alloc] initWithFormat:format arguments:ap];
    
    // End using variable argument list.
    va_end(ap);
    
    NSString *fileName = [[NSString stringWithUTF8String:file] lastPathComponent];
    fprintf(stderr, "(%s) (%s:%d) %s", functionName, [fileName UTF8String], lineNumber, [body UTF8String]);
}

@implementation ExtendNSLogFunctionality

@end