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package com.mbien.ant;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import static java.util.regex.Pattern.*;
/**
* Build setup utility. Uncomments funcion parameter names in header files.
*
* before:
* foo(int /x bar x/ )
*
* after:
* foo(int bar )
*
* @author Michael Bien
*/
public class FunctionParamUncommenter extends Task {
final static Pattern PARAMS_PATTERN
= compile("cl\\w+ \\( ( \\s* [^;]+ ) \\)", MULTILINE|COMMENTS);
final static Pattern COMMENT_PATTERN
= compile("\\s*(const)?\\w+\\s* \\**\\s+ (/\\*) \\s+[^\\*\\[]+ (\\*/)", MULTILINE|COMMENTS);
//^ array size in param name causes some problems
private String src;
private String dest;
@Override
public void execute() throws BuildException {
try {
uncomment(src, dest, true);
} catch (FileNotFoundException ex) {
throw new BuildException(ex);
} catch (IOException ex) {
throw new BuildException(ex);
}
}
private final void uncomment(String srcFile, String destFile, boolean replace) throws FileNotFoundException, IOException {
System.out.println("uncommenting params in "+srcFile);
StringBuilder headerSrc = readSourceFile(new File(srcFile));
Matcher matcher = PARAMS_PATTERN.matcher(headerSrc);
// iterate through funcions
while (matcher.find()) {
StringBuilder params = new StringBuilder(matcher.group(1));
// System.out.println("- - - - ");
// System.out.println(params.toString());
// System.out.println("- - - - ");
//iterate through params
Matcher m = COMMENT_PATTERN.matcher(params);
while(m.find()) {
//uncomment param
params.replace(m.start(2), m.end(2), " ");
params.replace(m.start(3), m.end(3), " ");
}
//replace old params with uncommented params
headerSrc.replace(matcher.start(1), matcher.end(1), params.toString());
}
if(replace) {
//replace old file
BufferedWriter out = new BufferedWriter(new FileWriter(destFile));
out.write(headerSrc.toString());
out.close();
}else{
System.out.println(headerSrc);
}
}
private final StringBuilder readSourceFile(File file) throws FileNotFoundException, IOException {
char[] buffer = new char[(int)file.length()];
FileReader reader = new FileReader(file);
int length = reader.read(buffer);
if(reader != null) {
reader.close();
}
StringBuilder sb = new StringBuilder();
sb.append(buffer, 0, length);
return sb;
}
public void setSrc(String src) {
this.src = src;
}
public void setDest(String dest) {
this.dest = dest;
}
}
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