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/*
*
* Copyright 2002-2004 The Ant-Contrib project
*
* 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 net.sf.antcontrib.cpptasks.compiler;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import net.sf.antcontrib.cpptasks.parser.Parser;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.Environment;
/**
* A command line C compiler that can utilize precompilation of header files
*
* @author Curt Arnold
*/
public abstract class PrecompilingCommandLineCompiler
extends
CommandLineCompiler implements PrecompilingCompiler {
protected PrecompilingCommandLineCompiler(String command,
String identifierArg, String[] sourceExtensions,
String[] headerExtensions, String outputSuffix, boolean libtool,
PrecompilingCommandLineCompiler libtoolCompiler,
boolean newEnvironment, Environment env) {
super(command, identifierArg, sourceExtensions, headerExtensions,
outputSuffix, libtool, libtoolCompiler, newEnvironment, env);
}
/**
*
* This method may be used to get two distinct compiler configurations, one
* for compiling the specified file and producing a precompiled header
* file, and a second for compiling other files using the precompiled
* header file.
*
* The last (preferrably only) include directive in the prototype file will
* be used to mark the boundary between pre-compiled and normally compiled
* headers.
*
* @param config
* base configuration
* @param prototype
* A source file (for example, stdafx.cpp) that is used to build
* the precompiled header file. @returns null if precompiled
* headers are not supported or a two element array containing
* the precompiled header generation configuration and the
* consuming configuration
*
*/
public CompilerConfiguration[] createPrecompileConfigurations(
CompilerConfiguration config, File prototype, String[] exceptFiles) {
//
// cast should success or someone is passing us a configuration
// that was prepared by another processor
//
CommandLineCompilerConfiguration cmdLineConfig = (CommandLineCompilerConfiguration) config;
//
// parse prototype file to determine last header
//
Parser parser = createParser(prototype);
String[] includes;
try {
Reader reader = new BufferedReader(new FileReader(prototype));
parser.parse(reader);
includes = parser.getIncludes();
} catch (IOException ex) {
throw new BuildException(
"Error parsing precompiled header protoype: "
+ prototype.toString() + ":" + ex.toString());
}
if (includes.length == 0) {
throw new BuildException("Precompiled header prototype: "
+ prototype.toString()
+ " does not contain any include directives.");
}
CompilerConfiguration[] configs = new CompilerConfiguration[2];
configs[0] = createPrecompileGeneratingConfig(cmdLineConfig, prototype,
includes[0]);
configs[1] = createPrecompileUsingConfig(cmdLineConfig, prototype,
includes[0], exceptFiles);
return configs;
}
abstract protected CompilerConfiguration createPrecompileGeneratingConfig(
CommandLineCompilerConfiguration baseConfig, File prototype,
String lastInclude);
abstract protected CompilerConfiguration createPrecompileUsingConfig(
CommandLineCompilerConfiguration baseConfig, File prototype,
String lastInclude, String[] exceptFiles);
}
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