| /* |
| * 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()]); |
| } |
| } |