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An embeddable C Preprocessor for the JVM.
/*
* Anarres C Preprocessor
* Copyright (c) 2007-2015, 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.Arrays;
import java.util.EnumSet;
import java.util.List;
import javax.annotation.Nonnull;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* (Currently a simple test class).
*/
public class Main {
private static final Logger LOG = LoggerFactory.getLogger(Main.class);
@Nonnull
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 {
OptionParser parser = new OptionParser();
OptionSpec helpOption = parser.accepts("help",
"Displays command-line help.")
.forHelp();
OptionSpec versionOption = parser.acceptsAll(Arrays.asList("version"),
"Displays the product version (" + BuildMetadata.getInstance().getVersion() + ") and exits.")
.forHelp();
OptionSpec debugOption = parser.acceptsAll(Arrays.asList("debug"),
"Enables debug output.");
OptionSpec defineOption = parser.acceptsAll(Arrays.asList("define", "D"),
"Defines the given macro.")
.withRequiredArg().ofType(String.class).describedAs("name[=definition]");
OptionSpec undefineOption = parser.acceptsAll(Arrays.asList("undefine", "U"),
"Undefines the given macro, previously either builtin or defined using -D.")
.withRequiredArg().describedAs("name");
OptionSpec includeOption = parser.accepts("include",
"Process file as if \"#" + "include \"file\"\" appeared as the first line of the primary source file.")
.withRequiredArg().ofType(File.class).describedAs("file");
OptionSpec incdirOption = parser.acceptsAll(Arrays.asList("incdir", "I"),
"Adds the directory dir to the list of directories to be searched for header files.")
.withRequiredArg().ofType(File.class).describedAs("dir");
OptionSpec iquoteOption = parser.acceptsAll(Arrays.asList("iquote"),
"Adds the directory dir to the list of directories to be searched for header files included using \"\".")
.withRequiredArg().ofType(File.class).describedAs("dir");
OptionSpec warningOption = parser.acceptsAll(Arrays.asList("warning", "W"),
"Enables the named warning class (" + getWarnings() + ").")
.withRequiredArg().ofType(String.class).describedAs("warning");
OptionSpec noWarningOption = parser.acceptsAll(Arrays.asList("no-warnings", "w"),
"Disables ALL warnings.");
OptionSpec inputsOption = parser.nonOptions()
.ofType(File.class).describedAs("Files to process.");
OptionSet options = parser.parse(args);
if (options.has(helpOption)) {
parser.printHelpOn(System.out);
return;
}
if (options.has(versionOption)) {
version(System.out);
return;
}
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");
if (options.has(debugOption))
pp.addFeature(Feature.DEBUG);
if (options.has(noWarningOption))
pp.getWarnings().clear();
for (String warning : options.valuesOf(warningOption)) {
warning = warning.toUpperCase();
warning = warning.replace('-', '_');
if (warning.equals("ALL"))
pp.addWarnings(EnumSet.allOf(Warning.class));
else
pp.addWarning(Enum.valueOf(Warning.class, warning));
}
for (String arg : options.valuesOf(defineOption)) {
int idx = arg.indexOf('=');
if (idx == -1)
pp.addMacro(arg);
else
pp.addMacro(arg.substring(0, idx), arg.substring(idx + 1));
}
for (String arg : options.valuesOf(undefineOption)) {
pp.getMacros().remove(arg);
}
for (File dir : options.valuesOf(incdirOption))
pp.getSystemIncludePath().add(dir.getAbsolutePath());
for (File dir : options.valuesOf(iquoteOption))
pp.getQuoteIncludePath().add(dir.getAbsolutePath());
for (File file : options.valuesOf(includeOption))
// Comply exactly with spec.
pp.addInput(new StringLexerSource("#" + "include \"" + file + "\"\n"));
List inputs = options.valuesOf(inputsOption);
if (inputs.isEmpty()) {
pp.addInput(new InputLexerSource(System.in));
} else {
for (File input : inputs)
pp.addInput(new FileLexerSource(input));
}
if (pp.getFeature(Feature.DEBUG)) {
LOG.info("#" + "include \"...\" search starts here:");
for (String dir : pp.getQuoteIncludePath())
LOG.info(" " + dir);
LOG.info("#" + "include <...> search starts here:");
for (String dir : pp.getSystemIncludePath())
LOG.info(" " + dir);
LOG.info("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) {
StringBuilder buf = new StringBuilder("Preprocessor failed:\n");
Source s = pp.getSource();
while (s != null) {
buf.append(" -> ").append(s).append("\n");
s = s.getParent();
}
LOG.error(buf.toString(), e);
}
}
private static void version(@Nonnull PrintStream out) {
BuildMetadata metadata = BuildMetadata.getInstance();
out.println("Anarres Java C Preprocessor version " + metadata.getVersion() + " change-id " + metadata.getChangeId());
out.println("Copyright (C) 2007-2015 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.");
}
}
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