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An embeddable C Preprocessor for the JVM.
/*
* Anarres C Preprocessor
* Copyright (c) 2007-2008, Shevek
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package org.anarres.cpp;
import java.io.File;
import java.io.PrintStream;
import java.util.EnumSet;
import gnu.getopt.Getopt;
import gnu.getopt.LongOpt;
/**
* (Currently a simple test class).
*/
public class Main {
private static class Option extends LongOpt {
private String eg;
private String help;
public Option(String word, int arg, int ch,
String eg, String help) {
super(word, arg, null, ch);
this.eg = eg;
this.help = help;
}
}
private static final Option[] OPTS = new Option[]{
new Option("help", LongOpt.NO_ARGUMENT, 'h', null,
"Displays help and usage information."),
new Option("define", LongOpt.REQUIRED_ARGUMENT, 'D', "name=definition",
"Defines the given macro."),
new Option("undefine", LongOpt.REQUIRED_ARGUMENT, 'U', "name",
"Undefines the given macro, previously either builtin or defined using -D."),
new Option("include", LongOpt.REQUIRED_ARGUMENT, 1, "file",
"Process file as if \"#" + "include \"file\"\" appeared as the first line of the primary source file."),
new Option("incdir", LongOpt.REQUIRED_ARGUMENT, 'I', "dir",
"Adds the directory dir to the list of directories to be searched for header files."),
new Option("iquote", LongOpt.REQUIRED_ARGUMENT, 0, "dir",
"Adds the directory dir to the list of directories to be searched for header files included using \"\"."),
new Option("warning", LongOpt.REQUIRED_ARGUMENT, 'W', "type",
"Enables the named warning class (" + getWarnings() + ")."),
new Option("no-warnings", LongOpt.NO_ARGUMENT, 'w', null,
"Disables ALL warnings."),
new Option("verbose", LongOpt.NO_ARGUMENT, 'v', null,
"Operates incredibly verbosely."),
new Option("debug", LongOpt.NO_ARGUMENT, 3, null,
"Operates incredibly verbosely."),
new Option("version", LongOpt.NO_ARGUMENT, 2, null,
"Prints jcpp's version number (" + Version.getVersion() + ")"),};
private static CharSequence getWarnings() {
StringBuilder buf = new StringBuilder();
for (Warning w : Warning.values()) {
if (buf.length() > 0)
buf.append(", ");
String name = w.name().toLowerCase();
buf.append(name.replace('_', '-'));
}
return buf;
}
public static void main(String[] args) throws Exception {
(new Main()).run(args);
}
public void run(String[] args) throws Exception {
Option[] opts = OPTS;
String sopts = getShortOpts(opts);
Getopt g = new Getopt("jcpp", args, sopts, opts);
int c;
String arg;
int idx;
Preprocessor pp = new Preprocessor();
pp.addFeature(Feature.DIGRAPHS);
pp.addFeature(Feature.TRIGRAPHS);
pp.addFeature(Feature.LINEMARKERS);
pp.addWarning(Warning.IMPORT);
pp.setListener(new DefaultPreprocessorListener());
pp.addMacro("__JCPP__");
pp.getSystemIncludePath().add("/usr/local/include");
pp.getSystemIncludePath().add("/usr/include");
pp.getFrameworksPath().add("/System/Library/Frameworks");
pp.getFrameworksPath().add("/Library/Frameworks");
pp.getFrameworksPath().add("/Local/Library/Frameworks");
GETOPT:
while ((c = g.getopt()) != -1) {
switch (c) {
case 'D':
arg = g.getOptarg();
idx = arg.indexOf('=');
if (idx == -1)
pp.addMacro(arg);
else
pp.addMacro(arg.substring(0, idx),
arg.substring(idx + 1));
break;
case 'U':
pp.getMacros().remove(g.getOptarg());
break;
case 'I':
pp.getSystemIncludePath().add(g.getOptarg());
break;
case 0: // --iquote=
pp.getQuoteIncludePath().add(g.getOptarg());
break;
case 'W':
arg = g.getOptarg().toUpperCase();
arg = arg.replace('-', '_');
if (arg.equals("ALL"))
pp.addWarnings(EnumSet.allOf(Warning.class));
else
pp.addWarning(Enum.valueOf(Warning.class, arg));
break;
case 'w':
pp.getWarnings().clear();
break;
case 1: // --include=
// pp.addInput(new File(g.getOptarg()));
// Comply exactly with spec.
pp.addInput(new StringLexerSource(
"#" + "include \"" + g.getOptarg() + "\"\n"
));
break;
case 2: // --version
version(System.out);
return;
case 'v':
pp.addFeature(Feature.VERBOSE);
break;
case 3:
pp.addFeature(Feature.DEBUG);
break;
case 'h':
usage(getClass().getName(), opts);
return;
default:
throw new Exception("Illegal option " + (char) c);
case '?':
continue; /* Make failure-proof. */
}
}
for (int i = g.getOptind(); i < args.length; i++)
pp.addInput(new FileLexerSource(new File(args[i])));
if (g.getOptind() == args.length)
pp.addInput(new InputLexerSource(System.in));
if (pp.getFeature(Feature.VERBOSE)) {
System.err.println("#" + "include \"...\" search starts here:");
for (String dir : pp.getQuoteIncludePath())
System.err.println(" " + dir);
System.err.println("#" + "include <...> search starts here:");
for (String dir : pp.getSystemIncludePath())
System.err.println(" " + dir);
System.err.println("End of search list.");
}
try {
for (;;) {
Token tok = pp.token();
if (tok == null)
break;
if (tok.getType() == Token.EOF)
break;
System.out.print(tok.getText());
}
} catch (Exception e) {
e.printStackTrace(System.err);
Source s = pp.getSource();
while (s != null) {
System.err.println(" -> " + s);
s = s.getParent();
}
}
}
private void version(PrintStream out) {
out.println("Anarres Java C Preprocessor version " + Version.getVersion());
out.println("Copyright (C) 2008-2014 Shevek (http://www.anarres.org/).");
out.println("This is free software; see the source for copying conditions. There is NO");
out.println("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.");
}
private static String getShortOpts(Option[] opts)
throws Exception {
StringBuilder buf = new StringBuilder();
for (int i = 0; i < opts.length; i++) {
char c = (char) opts[i].getVal();
if (!Character.isLetterOrDigit(c))
continue;
for (int j = 0; j < buf.length(); j++)
if (buf.charAt(j) == c)
throw new Exception(
"Duplicate short option " + c
);
buf.append(c);
switch (opts[i].getHasArg()) {
case LongOpt.NO_ARGUMENT:
break;
case LongOpt.OPTIONAL_ARGUMENT:
buf.append("::");
break;
case LongOpt.REQUIRED_ARGUMENT:
buf.append(":");
break;
}
}
return buf.toString();
}
/* This is incomplete but nearly there. */
/**
* Wraps a string.
*
* The output form is:
*
* prefix in[0]
* <--indent-> in[1]
* <--indent-> in[2]
* <-----width---->
*
*/
/* XXX There's some of this in commons. */
private static String wrap(String in, String prefix,
int indent, int width) {
StringBuilder buf = new StringBuilder(prefix);
while (buf.length() < indent)
buf.append(' ');
int start = 0;
while (start < in.length()) {
while (start < in.length()
&& Character.isWhitespace(in.charAt(start)))
start++;
int end = start + width - indent;
if (end > in.length()) {
buf.append(in.substring(start));
break;
}
int idx = end;
while (!Character.isWhitespace(in.charAt(idx)))
idx--;
if (idx == start) {
idx = end - 1;
buf.append(in.substring(start, idx));
buf.append('-');
} else {
buf.append(in.substring(start, idx));
start = idx;
}
start = idx;
}
return buf.toString();
}
private static void usage(String command, Option[] options) {
StringBuilder text = new StringBuilder("Usage: ");
text.append(command).append('\n');
for (int i = 0; i < options.length; i++) {
StringBuilder line = new StringBuilder();
Option opt = options[i];
line.append(" --").append(opt.getName());
switch (opt.getHasArg()) {
case LongOpt.NO_ARGUMENT:
break;
case LongOpt.OPTIONAL_ARGUMENT:
line.append("[=").append(opt.eg).append(']');
break;
case LongOpt.REQUIRED_ARGUMENT:
line.append('=').append(opt.eg);
break;
}
if (Character.isLetterOrDigit(opt.getVal()))
line.append(" (-").append((char) opt.getVal()).append(")");
if (line.length() < 30) {
while (line.length() < 30)
line.append(' ');
} else {
line.append('\n');
for (int j = 0; j < 30; j++)
line.append(' ');
}
/* This should use wrap. */
line.append(opt.help);
line.append('\n');
text.append(line);
}
System.out.println(text);
}
}
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