[Pixelle-commit] SF.net SVN: pixelle: [9] trunk/pixelle/etc/Pixelle.g

[<dbr...@us...>]

Revision: 9
          http://pixelle.svn.sourceforge.net/pixelle/?rev=9&view=rev
Author:   dbrosius
Date:     2008-06-17 19:30:50 -0700 (Tue, 17 Jun 2008)

Log Message:
-----------
main grammar file

Added Paths:
-----------
    trunk/pixelle/etc/Pixelle.g

Added: trunk/pixelle/etc/Pixelle.g
===================================================================
--- trunk/pixelle/etc/Pixelle.g	                        (rev 0)
+++ trunk/pixelle/etc/Pixelle.g	2008-06-18 02:30:50 UTC (rev 9)
@@ -0,0 +1,87 @@
+/*
+ * pixelle - Graphics algorithmic editor
+ * Copyright (C) 2008 Dave Brosius
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ grammar Pixelle;
+
+@header {
+package com.mebigfatguy.pixelle.antlr;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+}
+
+@lexer::header {
+package com.mebigfatguy.pixelle.antlr;
+}
+
+@members {
+	ClassWriter cw;
+	MethodVisitor mv;
+	
+	public PixelleParser(CommonTokenStream tokens, String clsName) {
+		super(tokens, new RecognizerSharedState());
+		
+		clsName = clsName.replace('.', '/');
+		cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
+		cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, clsName, null, "java/lang/Object", new String[] {"com/mebigfatguy/pixelle/PixelleExpr"}); 
+		mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
+        mv.visitVarInsn(Opcodes.ALOAD, 0);
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
+        mv.visitInsn(Opcodes.RETURN);
+		mv.visitMaxs(0,0);
+		mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "eval", "(Lcom/mebigfatguy/pixelle/PixelEval;II)D", null, new String[0]);
+	}
+	
+	public byte[] getClassBytes() {
+		mv.visitInsn(Opcodes.DRETURN);
+		mv.visitMaxs(0,0);
+		cw.visitEnd();
+		return cw.toByteArray();
+	}
+}
+
+pixelle :	expr;
+	
+expr
+	:	term  
+		('+' term 
+			{mv.visitInsn(Opcodes.DADD);} 
+	|    '-' term 
+	   		{mv.visitInsn(Opcodes.DSUB);})*;
+		
+term
+	:	factor {}
+		('*' factor 
+			{mv.visitInsn(Opcodes.DMUL);} 
+	| 	 '/' factor 
+	   		{mv.visitInsn(Opcodes.DDIV);})*;
+
+factor	
+	:	NUMBER 
+		{mv.visitLdcInsn(Double.valueOf($NUMBER.text));} 
+	|   'p' {mv.visitVarInsn(Opcodes.ALOAD, 1);} '[' expr { mv.visitInsn(Opcodes.D2I); } ',' expr { mv.visitInsn(Opcodes.D2I); } ']' '.' spec=('r'|'g'|'b'|'t'|'s') {String s = $spec.text; mv.visitLdcInsn(Character.valueOf(s.charAt(0))); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/mebigfatguy/pixelle/PixelEval", "getValue", "(IIC)D" );} 
+	| 	'x' {mv.visitVarInsn(Opcodes.ILOAD, 2); mv.visitInsn(Opcodes.I2D);}
+	| 	'y' {mv.visitVarInsn(Opcodes.ILOAD, 3); mv.visitInsn(Opcodes.I2D);}
+	|	'width' {mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/mebigfatguy/pixelle/PixelEval", "getWidth", "()D" );}
+	|	'height' {mv.visitVarInsn(Opcodes.ALOAD, 1); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/mebigfatguy/pixelle/PixelEval", "getHeight", "()D" );};
+
+NUMBER :   '0'..'9'+ ( '.' ('0'..'9'+))?;
+
+NEWLINE:'\r'? '\n' ;
+			
+


Property changes on: trunk/pixelle/etc/Pixelle.g
___________________________________________________________________
Name: svn:mime-type
   + text/plain
Name: svn:eol-style
   + native


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