/**
* Return the directory containing the grammar file for this grammar. normally this is a relative
* path from current directory. People will often do "java org.antlr.Tool grammars/*.g3" So the
* file will be "grammars/foo.g3" etc... This method returns "grammars".
*
* <p>If we have been given a specific input directory as a base, then we must find the directory
* relative to this directory, unless the file name is given to us in absolute terms.
*/
public String getFileDirectory(String fileName) {
File f;
if (haveInputDir && !fileName.startsWith(File.separator)) {
f = new File(inputDirectory, fileName);
} else {
f = new File(fileName);
}
// And ask Java what the base directory of this location is
//
return f.getParent();
}
/** Get a grammar mentioned on the command-line and any delegates */
public Grammar getRootGrammar(String grammarFileName) throws IOException {
// StringTemplate.setLintMode(true);
// grammars mentioned on command line are either roots or single grammars.
// create the necessary composite in case it's got delegates; even
// single grammar needs it to get token types.
CompositeGrammar composite = new CompositeGrammar();
Grammar grammar = new Grammar(this, grammarFileName, composite);
composite.setDelegationRoot(grammar);
FileReader fr = null;
File f = null;
if (haveInputDir) {
f = new File(inputDirectory, grammarFileName);
} else {
f = new File(grammarFileName);
}
// Store the location of this grammar as if we import files, we can then
// search for imports in the same location as the original grammar as well as in
// the lib directory.
//
parentGrammarDirectory = f.getParent();
if (grammarFileName.lastIndexOf(File.separatorChar) == -1) {
grammarOutputDirectory = ".";
} else {
grammarOutputDirectory =
grammarFileName.substring(0, grammarFileName.lastIndexOf(File.separatorChar));
}
fr = new FileReader(f);
BufferedReader br = new BufferedReader(fr);
grammar.parseAndBuildAST(br);
composite.watchNFAConversion = internalOption_watchNFAConversion;
br.close();
fr.close();
return grammar;
}