jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javah/Gen.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javah/Gen.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javah/Gen.java

Thu, 02 Oct 2008 19:58:40 -0700

author: xdono
date: Thu, 02 Oct 2008 19:58:40 -0700
changeset 117: 24a47c3062fe
parent 74: 5a9172b251dd
child 184: 905e151a185a
permissions: -rw-r--r--

6754988: Update copyright year
Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

 /*
  * Copyright 2002-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code 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 General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.javah;
 import java.io.UnsupportedEncodingException;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintWriter;
 import com.sun.javadoc.*;
 import java.io.*;
 import java.util.Stack;
 import java.util.Vector;
 import java.util.Arrays;
 /**
  * An abstraction for generating support files required by native methods.
  * Subclasses are for specific native interfaces. At the time of its
  * original writing, this interface is rich enough to support JNI and the
  * old 1.0-style native method interface.
  *
  * @author  Sucheta Dambalkar(Revised)
  */
 public abstract class Gen {
     protected String lineSep = System.getProperty("line.separator");
     RootDoc root;
     /*
      * List of classes for which we must generate output.
      */
     protected ClassDoc[] classes;
     static private final boolean isWindows =
         System.getProperty("os.name").startsWith("Windows");
     public Gen(RootDoc root){
         this.root = root;
     }
     /**
      * Override this abstract method, generating content for the named
      * class into the outputstream.
      */
     protected abstract void write(OutputStream o, ClassDoc clazz)
         throws ClassNotFoundException;
     /**
      * Override this method to provide a list of #include statements
      * required by the native interface.
      */
     protected abstract String getIncludes();
     /*
      * Output location.
      */
     protected String outDir;
     protected String outFile;
     public void setOutDir(String outDir) {
         /* Check important, otherwise concatenation of two null strings
          * produces the "nullnull" String.
          */
         if (outDir != null) {
             this.outDir = outDir + System.getProperty("file.separator");
             File d = new File(outDir);
             if (!d.exists())
                 if (!d.mkdirs())
                     Util.error("cant.create.dir", d.toString());
         }
     }
     public void setOutFile(String outFile) {
         this.outFile = outFile;
     }
     public void setClasses(ClassDoc[] classes) {
         this.classes = classes;
     }
     /*
      * Smartness with generated files.
      */
     protected boolean force = false;
     public void setForce(boolean state) {
         force = state;
     }
     /**
      * We explicitly need to write ASCII files because that is what C
      * compilers understand.
      */
     protected PrintWriter wrapWriter(OutputStream o) {
         try {
             return new
             PrintWriter(new OutputStreamWriter(o, "ISO8859_1"), true);
         } catch (UnsupportedEncodingException use) {
             Util.bug("encoding.iso8859_1.not.found");
             return null; /* dead code */
         }
     }
     /**
      * After initializing state of an instance, use this method to start
      * processing.
      *
      * Buffer size chosen as an approximation from a single sampling of:
      *         expr `du -sk` / `ls *.h | wc -l`
      */
     public void run() throws IOException, ClassNotFoundException {
         int i = 0;
         if (outFile != null) {
             /* Everything goes to one big file... */
             ByteArrayOutputStream bout = new ByteArrayOutputStream(8192);
             writeFileTop(bout); /* only once */
             for (i = 0; i < classes.length; i++) {
                 write(bout, classes[i]);
             }
             writeIfChanged(bout.toByteArray(), outFile);
         } else {
             /* Each class goes to its own file... */
             for (i = 0; i < classes.length; i++) {
                 ByteArrayOutputStream bout = new ByteArrayOutputStream(8192);
                 writeFileTop(bout);
                 ClassDoc clazz = classes[i];
                 write(bout, clazz);
                 writeIfChanged(bout.toByteArray(), getFileName(clazz.qualifiedName()));
             }
         }
     }
     /*
      * Write the contents of byte[] b to a file named file.  Writing
      * is done if either the file doesn't exist or if the contents are
      * different.
      */
     private void writeIfChanged(byte[] b, String file) throws IOException {
         File f = new File(file);
         boolean mustWrite = false;
         String event = "[No need to update file ";
         if (force) {
             mustWrite = true;
             event = "[Forcefully writing file ";
         } else {
             if (!f.exists()) {
                 mustWrite = true;
                 event = "[Creating file ";
             } else {
                 int l = (int)f.length();
                 if (b.length != l) {
                     mustWrite = true;
                     event = "[Overwriting file ";
                 } else {
                     /* Lengths are equal, so read it. */
                     byte[] a = new byte[l];
                     FileInputStream in = new FileInputStream(f);
                     if (in.read(a) != l) {
                         in.close();
                         /* This can't happen, we already checked the length. */
                         Util.error("not.enough.bytes", Integer.toString(l),
                                    f.toString());
                     }
                     in.close();
                     while (--l >= 0) {
                         if (a[l] != b[l]) {
                             mustWrite = true;
                             event = "[Overwriting file ";
                         }
                     }
                 }
             }
         }
         if (Util.verbose)
             Util.log(event + file + "]");
         if (mustWrite) {
             OutputStream out = new FileOutputStream(file);
             out.write(b); /* No buffering, just one big write! */
             out.close();
         }
     }
     protected String defineForStatic(ClassDoc c, FieldDoc f){
         String cnamedoc = c.qualifiedName();
         String fnamedoc = f.name();
         String cname = Mangle.mangle(cnamedoc, Mangle.Type.CLASS);
         String fname = Mangle.mangle(fnamedoc, Mangle.Type.FIELDSTUB);
         if (!f.isStatic())
             Util.bug("tried.to.define.non.static");
         if (f.isFinal()) {
             Object value = null;
             value = f.constantValue();
             if (value != null) { /* so it is a ConstantExpression */
                 String constString = null;
                 if ((value instanceof Integer)
                     || (value instanceof Byte)
                     || (value instanceof Character)
                     || (value instanceof Short)
                     || (value instanceof Boolean)) {
                     /* covers byte, boolean, char, short, int */
                     if(value instanceof Boolean)
                         constString = (value.toString() == "true") ? "1L" : "0L";
                     else
                         constString = value.toString() + "L";
                 } else if (value instanceof Long) {
                     // Visual C++ supports the i64 suffix, not LL.
                     if (isWindows)
                         constString = value.toString() + "i64";
                     else
                         constString = value.toString() + "LL";
                 } else if (value instanceof Float) {
                     /* bug for bug */
                     float fv = ((Float)value).floatValue();
                     if (Float.isInfinite(fv))
                         constString = ((fv < 0) ? "-" : "") + "Inff";
                     else
                         constString = value.toString() + "f";
                 } else if (value instanceof Double) {
                     /* bug for bug */
                     double d = ((Double)value).doubleValue();
                     if (Double.isInfinite(d))
                         constString = ((d < 0) ? "-" : "") + "InfD";
                     else
                         constString = value.toString();
                 }
                 if (constString != null) {
                     StringBuffer s = new StringBuffer("#undef ");
                     s.append(cname); s.append("_"); s.append(fname); s.append(lineSep);
                     s.append("#define "); s.append(cname); s.append("_");
                     s.append(fname); s.append(" "); s.append(constString);
                     return s.toString();
                 }
             }
         }
         return null;
     }
     /*
      * Deal with the C pre-processor.
      */
     protected String cppGuardBegin() {
         return "#ifdef __cplusplus" + lineSep + "extern \"C\" {" + lineSep + "#endif";
     }
     protected String cppGuardEnd() {
         return "#ifdef __cplusplus" + lineSep + "}" + lineSep + "#endif";
     }
     protected String guardBegin(String cname) {
         return "/* Header for class " + cname + " */" + lineSep + lineSep +
             "#ifndef _Included_" + cname + lineSep +
             "#define _Included_" + cname;
     }
     protected String guardEnd(String cname) {
         return "#endif";
     }
     /*
      * File name and file preamble related operations.
      */
     protected void writeFileTop(OutputStream o) {
         PrintWriter pw = wrapWriter(o);
         pw.println("/* DO NOT EDIT THIS FILE - it is machine generated */" + lineSep +
                    getIncludes());
     }
     protected String baseFileName(String clazz) {
         StringBuffer f =
             new StringBuffer(Mangle.mangle(clazz,
                                            Mangle.Type.CLASS));
         if (outDir != null) {
             f.insert(0, outDir);
         }
         return f.toString();
     }
     protected String getFileName(String clazz) {
         return baseFileName(clazz) + getFileSuffix();
     }
     protected String getFileSuffix() {
         return ".h";
     }
     /**
      * Including super classes' fields.
      */
     FieldDoc[] getAllFields(ClassDoc subclazz)
                 throws ClassNotFoundException {
         Vector<FieldDoc> fields = new Vector<FieldDoc>();
         ClassDoc cd = null;
         Stack s = new Stack();
         cd = subclazz;
         while (true) {
             s.push(cd);
             ClassDoc c = cd.superclass();
             if (c == null)
                 break;
             cd = c;
         }
         while (!s.empty()) {
             cd = (ClassDoc)s.pop();
             fields.addAll(Arrays.asList(cd.fields()));
         }
         return (FieldDoc[]) fields.toArray(new FieldDoc[fields.size()]);
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javah/Gen.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javah/Gen.java