Chapter 19, 20, 21

を終了。

External Target選択時のお話。

XCode Preference -> debug -> Load symbols lazily

デバッグの環境設定で、「CFMを使わないでシンボルを読み込む」をはずす。

http://d.hatena.ne.jp/RNatori/20080101#1199167404

http://www.cocoabuilder.com/archive/message/xcode/2007/12/6/17972

http://macresearch.org/tutorial_building_configure_make_projects_in_xcode

http://homepage.mac.com/mkino2/spec/optimize/allocation.html

写経です。

allocation.m

#import <Foundation/Foundation.h>

@interface Bar : NSObject { }
@end

@implementation Bar
@end

@interface Foo : Bar
{ 
  int value;
}
@end

@implementation Foo
- (NSString *)description
{
  return( [NSString stringWithFormat:@"%@ value=%d", [super description], value]
	  );
}
@end

int main( void )
{
  NSAutoreleasePool *pool;
  unsigned int obj[2];

  pool = [[NSAutoreleasePool alloc] init];
  obj[0] = (int)[Foo class];
  obj[1] = 2;

  NSLog( @"Using obj as a Foo object; %@", (id)obj );
  [pool release];

  return 0;
}

% gcc allocation.m -framework Foundation && ./a.out

2008-01-06 11:32:04.626 a.out[20996:10b] Using obj as a Foo object; <Foo: 0xbfffea44> value=2

参考リンク

Q: malloc(0) は何をするものですか？free(NULL) とは何ですか？

http://developer.apple.com/jp/qa/qa2001/qa1259.html

http://www.opensource.apple.com/darwinsource/10.0/Chess-45/gnuglue.m

NSString *copyright_text ()
{
    NSBundle *bundle = [NSBundle mainBundle];
    NSString *path   = [bundle pathForResource: @"COPYING" ofType: nil];
    if( path ) {
	NSString *string = [NSString stringWithContentsOfFile: path];
	if( string )
	    return string;
    }
    return nil;
}

NSString *user_fullname ()
{
    struct passwd *pwen = getpwuid( getuid() );
    return [NSString stringWithCString: (const char *) pwen->pw_gecos];
}