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Diffstat (limited to 'tools/external/asm/org/objectweb/asm/optimizer/Shrinker.java')
| -rw-r--r-- | tools/external/asm/org/objectweb/asm/optimizer/Shrinker.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/optimizer/Shrinker.java b/tools/external/asm/org/objectweb/asm/optimizer/Shrinker.java new file mode 100644 index 000000000..94e4068f0 --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/optimizer/Shrinker.java @@ -0,0 +1,168 @@ +/*** + * ASM: a very small and fast Java bytecode manipulation framework + * Copyright (c) 2000-2005 INRIA, France Telecom + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ +package org.objectweb.asm.optimizer; + +import java.io.File; +import java.io.FileInputStream; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.util.Comparator; +import java.util.Iterator; +import java.util.Set; +import java.util.TreeSet; + +import org.objectweb.asm.ClassReader; +import org.objectweb.asm.ClassWriter; + +/** + * A class file shrinker utility. + * + * @author Eric Bruneton + */ +public class Shrinker { + + public static void main(final String[] args) throws IOException { + NameMapping mapping = new NameMapping(args[0]); + File f = new File(args[1]); + File d = new File(args[2]); + optimize(f, d, mapping); + Iterator i = mapping.unused.iterator(); + while (i.hasNext()) { + System.out.println("INFO: unused mapping " + i.next()); + } + } + + static void optimize(final File f, final File d, final NameMapping mapping) + throws IOException + { + if (f.isDirectory()) { + File[] files = f.listFiles(); + for (int i = 0; i < files.length; ++i) { + optimize(files[i], d, mapping); + } + } else if (f.getName().endsWith(".class")) { + ConstantPool cp = new ConstantPool(); + ClassReader cr = new ClassReader(new FileInputStream(f)); + ClassWriter cw = new ClassWriter(false); + ClassConstantsCollector ccc = new ClassConstantsCollector(cw, cp); + ClassOptimizer co = new ClassOptimizer(ccc, mapping); + cr.accept(co, true); + + Set constants = new TreeSet(new ConstantComparator()); + constants.addAll(cp.values()); + + cr = new ClassReader(cw.toByteArray()); + cw = new ClassWriter(false); + Iterator i = constants.iterator(); + while (i.hasNext()) { + Constant c = (Constant) i.next(); + c.write(cw); + } + cr.accept(cw, true); + + String n = mapping.map(co.getClassName()); + File g = new File(d, n + ".class"); + if (!g.exists() || g.lastModified() < f.lastModified()) { + g.getParentFile().mkdirs(); + OutputStream os = new FileOutputStream(g); + os.write(cw.toByteArray()); + os.close(); + } + } + } + + static class ConstantComparator implements Comparator { + + public int compare(final Object o1, final Object o2) { + Constant c1 = (Constant) o1; + Constant c2 = (Constant) o2; + int d = getSort(c1) - getSort(c2); + if (d == 0) { + switch (c1.type) { + case 'I': + return new Integer(c1.intVal).compareTo(new Integer(c2.intVal)); + case 'J': + return new Long(c1.longVal).compareTo(new Long(c2.longVal)); + case 'F': + return new Float(c1.floatVal).compareTo(new Float(c2.floatVal)); + case 'D': + return new Double(c1.doubleVal).compareTo(new Double(c2.doubleVal)); + case 's': + case 'S': + case 'C': + return c1.strVal1.compareTo(c2.strVal1); + case 'T': + d = c1.strVal1.compareTo(c2.strVal1); + if (d == 0) { + d = c1.strVal2.compareTo(c2.strVal2); + } + break; + default: + d = c1.strVal1.compareTo(c2.strVal1); + if (d == 0) { + d = c1.strVal2.compareTo(c2.strVal2); + if (d == 0) { + d = c1.strVal3.compareTo(c2.strVal3); + } + } + } + } + return d; + } + + private int getSort(Constant c) { + switch (c.type) { + case 'I': + return 0; + case 'J': + return 1; + case 'F': + return 2; + case 'D': + return 3; + case 's': + return 4; + case 'S': + return 5; + case 'C': + return 6; + case 'T': + return 7; + case 'G': + return 8; + case 'M': + return 9; + default: + return 10; + } + } + } +} |