Archive for 1月 16th, 2013

1. Hello, Win32 API(Jasmin) World!

   Posted on 1月 16th, 2013 by cx20

   Win32 API(Jasmin)

   Win32 API は、Windows の機能にアクセスする為の API（Application Programming Interface）である。
   以下は Jasmin にて SWT の非公開 API を使用した Win32 API 呼出しの例となっている。

   ソースコード

   Hello.j

   raw download

   ; Produced by NeoJasminVisitor (tinapoc) ; http://tinapoc.sourceforge.net ; The original JasminVisitor is part of the BCEL ; http://jakarta.apache.org/bcel/ ; Sat Dec 08 23:04:58 JST 2012   .bytecode 51.0 .source Hello.java .class public Hello .super java/lang/Object     .method public ()V .limit stack 1 .limit locals 1 .var 0 is this LHello; from Label0 to Label1   Label0: .line 4 0: aload_0 1: invokespecial java/lang/Object/()V   Label1: 4: return   .end method     .method public static main([Ljava/lang/String;)V .limit stack 5 .limit locals 3 .var 0 is arg0 [Ljava/lang/String; from Label0 to Label1     Label0: .line 6 0: new org/eclipse/swt/internal/win32/TCHAR 3: dup 4: iconst_0 5: ldc "Hello, Win32 API World!" 7: iconst_1 8: invokespecial org/eclipse/swt/internal/win32/TCHAR/(ILjava/lang/String;Z)V 11: astore_1   .line 7 12: new org/eclipse/swt/internal/win32/TCHAR 15: dup 16: iconst_0 17: ldc "Hello, World" 19: iconst_1 20: invokespecial org/eclipse/swt/internal/win32/TCHAR/(ILjava/lang/String;Z)V 23: astore_2   .line 8 24: iconst_0 25: aload_1 26: aload_2 27: iconst_0 28: invokestatic org/eclipse/swt/internal/win32/OS/MessageBox(ILorg/eclipse/swt/internal/win32/TCHAR;Lorg/eclipse/swt/internal/win32/TCHAR;I)I 31: pop   Label1: .line 9 32: return   .end method

   ; Produced by NeoJasminVisitor (tinapoc) ; http://tinapoc.sourceforge.net ; The original JasminVisitor is part of the BCEL ; http://jakarta.apache.org/bcel/ ; Sat Dec 08 23:04:58 JST 2012 .bytecode 51.0 .source Hello.java .class public Hello .super java/lang/Object .method public ()V .limit stack 1 .limit locals 1 .var 0 is this LHello; from Label0 to Label1 Label0: .line 4 0: aload_0 1: invokespecial java/lang/Object/()V Label1: 4: return .end method .method public static main([Ljava/lang/String;)V .limit stack 5 .limit locals 3 .var 0 is arg0 [Ljava/lang/String; from Label0 to Label1 Label0: .line 6 0: new org/eclipse/swt/internal/win32/TCHAR 3: dup 4: iconst_0 5: ldc "Hello, Win32 API World!" 7: iconst_1 8: invokespecial org/eclipse/swt/internal/win32/TCHAR/(ILjava/lang/String;Z)V 11: astore_1 .line 7 12: new org/eclipse/swt/internal/win32/TCHAR 15: dup 16: iconst_0 17: ldc "Hello, World" 19: iconst_1 20: invokespecial org/eclipse/swt/internal/win32/TCHAR/(ILjava/lang/String;Z)V 23: astore_2 .line 8 24: iconst_0 25: aload_1 26: aload_2 27: iconst_0 28: invokestatic org/eclipse/swt/internal/win32/OS/MessageBox(ILorg/eclipse/swt/internal/win32/TCHAR;Lorg/eclipse/swt/internal/win32/TCHAR;I)I 31: pop Label1: .line 9 32: return .end method

   コンパイル＆実行方法

   C:¥> jasmin Hello.j C:¥> java -cp org.eclipse.swt.win32.win32.x86_3.6.1.v3655c.jar;. Hello

   C:¥> jasmin Hello.j C:¥> java -cp org.eclipse.swt.win32.win32.x86_3.6.1.v3655c.jar;. Hello

   実行結果

   --------------------------- Hello, World! --------------------------- Hello, Win32 API World! --------------------------- OK ---------------------------

   --------------------------- Hello, World! --------------------------- Hello, Win32 API World! --------------------------- OK ---------------------------