/*
* Copyright 2013 the original author or authors.
*
* 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.gradle.language.nativeplatform.internal.incremental.sourceparser;
import com.google.common.collect.Lists;
import org.apache.commons.io.IOUtils;
import org.gradle.api.UncheckedIOException;
import org.gradle.language.nativeplatform.internal.Include;
import org.gradle.language.nativeplatform.internal.IncludeDirectives;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexBackedCSourceParser implements CSourceParser {
private static final String INCLUDE_IMPORT_PATTERN = "#\\s*(include|import)\\s*((<[^>]+>)|(\"[^\"]+\")|(\\w+))";
private final Pattern includePattern;
public RegexBackedCSourceParser() {
this.includePattern = Pattern.compile(INCLUDE_IMPORT_PATTERN, Pattern.CASE_INSENSITIVE);
}
@Override
public IncludeDirectives parseSource(File sourceFile) {
return new DefaultIncludeDirectives(parseFile(sourceFile));
}
private List<Include> parseFile(File file) {
List<Include> includes = Lists.newArrayList();
try {
BufferedReader bf = new BufferedReader(new PreprocessingReader(new BufferedReader(new FileReader(file))));
try {
String line;
while ((line = bf.readLine()) != null) {
Matcher m = includePattern.matcher(line.trim());
if (m.matches()) {
boolean isImport = "import".equals(m.group(1));
String value = m.group(2);
includes.add(DefaultInclude.parse(value, isImport));
}
}
} finally {
IOUtils.closeQuietly(bf);
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
return includes;
}
}