{
  "format_version": 1,
  "id": "00123456789ABCDEF0123456789ABCDEF0123456",
  "version": "1.0",
  "name": "Pin Extension for Google Reader",
  "description": "Pin Extension for Google Reader",
  "content_scripts": [
    {
      "matches": ["http://www.google.com/reader/view/*", "https://www.google.com/reader/view/*", "http://www.google.co.jp/reader/view/*", "https://www.google.co.jp/reader/view/*"],
      "js": ["GoogleReaderPin.user.js"]
    }
  ]
}

./configure --disable-video
...
No package 'ImageMagick++' found

./configure --disable-video
...
No package 'gtk+-2.0' found

./configure --prefix=/Users/Masahiro/tmp/libzebra --disable-video --without-gtk --without-qt --without-xv --without-xshm --without-x --without-python
...
please verify that the detected configuration matches your expectations:
------------------------------------------------------------------------
X                 --with-x=no
pthreads          --enable-pthread=yes
v4l               --enable-video=no
        => zebracam video scanner will *NOT* be built
jpeg              --with-jpeg=no
        => JPEG image conversions will *NOT* be supported
Magick++          --with-imagemagick=yes
Python            --with-python=no
GTK+              --with-gtk=no
        => the GTK+ widget will *NOT* be built
Qt4               --with-qt=no
        => the Qt4 widget will *NOT* be built

#import <Foundation/Foundation.h>
#import <zebra.h>
 
#define fourcc(a, b, c, d) \
    ((uint32_t)(a) | ((uint32_t)(b) << 8) | \
    ((uint32_t)(c) << 16) | ((uint32_t)(d) << 24))
 
void dataHandler(zebra_image_t* zimage, const void* userdata) {
    NSLog(@"succeeded to scan barcode");
    const zebra_symbol_t* symbol = zebra_image_first_symbol(zimage);
    zebra_symbol_type_t type = zebra_symbol_get_type(symbol);
    const char* data = zebra_symbol_get_data(symbol);
    NSLog(@"type: %d, data: %s", type, data);
}
 
void cleanupHandler(zebra_image_t* zimage) {
    NSLog(@"cleanup called");
}
 
CGImageRef createCGImageFromData(NSData* data) {
    CGImageRef imageRef = NULL;
    CGImageSourceRef sourceRef = CGImageSourceCreateWithData((CFDataRef)data, NULL);
    if (sourceRef) {
        imageRef = CGImageSourceCreateImageAtIndex(sourceRef, 0, NULL);
        CFRelease(sourceRef);
    }
    return imageRef;
}
 
int main(int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    //
    // ファイルから画像を読み込みビットマップに変換する
    //
    NSData* data = [[[NSData alloc] initWithContentsOfFile:@"/Users/Masahiro/Desktop/Zbar.114.png"] autorelease];
    CGImageRef image = createCGImageFromData(data);
    if (!image) {
        NSLog(@"faild to execute createCGImageFromData");
        exit(1);
    }
    int width = CGImageGetWidth(image);
    int height = CGImageGetHeight(image);
    CGRect rect = CGRectMake(0, 0, width, height);
    int bitsPerComponent = 8;
    int bytesPerRow = width;
    int bitmapByteCount = bytesPerRow * height;
    void* bitmap = malloc(bitmapByteCount);
    CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
    CGContextRef c = CGBitmapContextCreate(bitmap,
                                           width,
                                           height,
                                           bitsPerComponent,
                                           bytesPerRow,
                                           colorspace,
                                           kCGImageAlphaNone);
    CGColorSpaceRelease(colorspace);
    CGContextDrawImage(c, rect, image);
    CGContextRelease(c);
 
    //
    // バーコードを読み取る
    //
    zebra_image_scanner_t* scanner = zebra_image_scanner_create();
    zebra_image_scanner_set_data_handler(scanner, dataHandler, NULL);
    zebra_image_t* zimage = zebra_image_create();
    zebra_image_set_format(zimage, fourcc('Y', '8', '0', '0'));
    zebra_image_set_size(zimage, width, height);
    zebra_image_set_data(zimage, bitmap, bitmapByteCount, cleanupHandler);
    zebra_scan_image(scanner, zimage);
    zebra_image_destroy(zimage);
    zebra_image_scanner_destroy(scanner);
 
    [pool drain];
    return 0;
}

2009-03-20 13:18:51.084 ObjC Test[98413:10b] succeeded to scan barcode
2009-03-20 13:18:51.086 ObjC Test[98413:10b] type: 13, data: 9876543210128
2009-03-20 13:18:51.087 ObjC Test[98413:10b] cleanup called

#import <Foundation/Foundation.h>
 
@interface MyObject1 : NSObject
{
    id delegate;
}
- (void)hello;
- (void)setDelegate:(id)anObject;
@end
 
@implementation MyObject1
- (void)hello {
    if (delegate == nil) {
        NSLog(@"Hello");
    } else if ([delegate respondsToSelector:@selector(hello)]) {
        [delegate hello];
    }
}
 
- (void)setDelegate:(id)anObject {
    delegate = anObject;
}
@end
 
@interface MyObject2 : NSObject
- (void)hello;
@end
 
@implementation MyObject2
- (void)hello {
    NSLog(@"こんにちは");
}
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    // 以下 2 行を有効にすると、myObject1 は myObject2 に処理を移譲し、"こんにちは" が表示される
    // MyObject2* myObject2 = [[[MyObject2 alloc] init] autorelease];
    // [myObject1 setDelegate:myObject2];
    [myObject1 hello];
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@interface MyObject1 : NSObject
@end
 
@implementation MyObject1
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    [myObject1 hello];
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@protocol Greetings
- (void)hello;
- (void)goodby;
@end
 
@interface MyObject1 : NSObject <Greetings>
@end
 
@implementation MyObject1
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    [myObject1 hello];
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@protocol Greetings
- (void)hello;
- (void)goodby;
@end
 
@interface MyObject1 : NSObject <Greetings>
@end
 
@implementation MyObject1
- (void)hello {
    NSLog(@"hello");
}
 
- (void)goodby {
    NSLog(@"goodby");
}
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    [myObject1 hello];
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@protocol Greetings
- (void)hello;
- (void)goodby;
@end
 
@interface MyObject1 : NSObject <Greetings>
@end
 
@implementation MyObject1
- (void)hello {
    NSLog(@"hello");
}
 
- (void)goodby {
    NSLog(@"goodby");
}
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    if ([myObject1 conformsToProtocol:@protocol(Greetings)]) {
        NSLog(@"myObject1 conforms to Greetings protocol");
    }
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@interface NSString (Greetings1)
- (void)hello;
@end
 
@implementation NSString (Greetings1)
- (void)hello {
    NSLog(@"Hello! in Greetings1");
}
@end
 
@interface NSString (Greetings2)
- (void)hello;
@end
 
@implementation NSString (Greetings2)
- (void)hello {
    NSLog(@"Hello! in Greetings2");
}
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 
    //
    // NSString の拡張メソッド hello を呼び出す
    //
    NSString* myNSString = [[[NSString alloc] initWithUTF8String:"hoge"] autorelease];
    [myNSString hello];
 
    [pool drain];
    return 0;
}

#import <Foundation/Foundation.h>
 
@interface MyObject1 : NSObject {
}
- (void)hello;
- (void)goodby;
- (void)goodMorning:(NSString*)firstName lastName:(NSString*)lastName;
@end
 
@implementation MyObject1
- (void)hello {
    NSLog(@"hello");
}
 
- (void)goodby {
    NSLog(@"goodby");
}
 
- (void)goodMorning:(NSString*)firstName lastName:(NSString*)lastName {
    NSLog(@"good morning, %@ %@", lastName, firstName);
}
@end
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    //
    // 現在の時間によりメソッドを呼び分ける
    //
    MyObject1* myObject1 = [[[MyObject1 alloc] init] autorelease];
    time_t now = time(0);
    struct tm* t = localtime(&now);
    SEL method = t->tm_hour < 12 ? @selector(hello) : @selector(goodby);
    [myObject1 performSelector:method];
 
    //
    // goodMorning メソッドを実装しているか調べる
    //
    NSString* msg = NULL;
    if ([myObject1 respondsToSelector:@selector(goodMorning:lastName:)]) {
        msg = [NSString stringWithCString:"goodMorning:lastName: is implemented"];
    } else {
        msg = [NSString stringWithCString:"goodMorning:lastName: is NOT implemented"];
    }
    NSLog(msg);
 
    [pool drain];
    return 0;
}