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// **********************************************************************
//
// Copyright (c) 2003-2009 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
class Grammar
{
Grammar(Parser p)
{
_parser = p;
_scanner = new Scanner(_parser);
}
void
parse()
{
while(true)
{
try
{
_token = _scanner.nextToken();
if(_token == null)
{
return;
}
else if(_token.type == Token.TOK_SEMI)
{
// Continue
}
else if(_token.type == Token.TOK_HELP)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.usage();
}
else if(_token.type == Token.TOK_EXIT)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
return;
}
else if(_token.type == Token.TOK_LIST)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.list(false);
}
else if(_token.type == Token.TOK_LIST_RECURSIVE)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.list(true);
}
else if(_token.type == Token.TOK_CREATE_FILE)
{
java.util.List<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() == 0)
{
throw new ParseError("usage: mkfile FILE [FILE...]");
}
_parser.createFile(s);
}
else if(_token.type == Token.TOK_CREATE_DIR)
{
java.util.List<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() == 0)
{
throw new ParseError("usage: mkdir DIR [DIR...]");
}
_parser.createDir(s);
}
else if(_token.type == Token.TOK_PWD)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
_parser.pwd();
}
else if(_token.type == Token.TOK_CD)
{
java.util.List<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() > 1)
{
throw new ParseError("usage: cd [DIR]");
}
else if(s.size() == 0)
{
_parser.cd("/");
}
else
{
_parser.cd((String)s.get(0));
}
}
else if(_token.type == Token.TOK_CAT)
{
java.util.List<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() != 1)
{
throw new ParseError("usage: cat FILE");
}
_parser.cat((String)s.get(0));
}
else if(_token.type == Token.TOK_WRITE)
{
java.util.LinkedList<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() == 0)
{
throw new ParseError("usage: write FILE [STRING...]");
}
_parser.write(s);
}
else if(_token.type == Token.TOK_RM)
{
java.util.List<String> s = strings();
if(_token.type != Token.TOK_SEMI)
{
throw new ParseError("Expected ';'");
}
if(s.size() == 0)
{
throw new ParseError("usage: rm NAME [NAME...]");
}
_parser.destroy(s);
}
else
{
_parser.error("parse error");
}
}
catch(ParseError e)
{
_parser.error("Parse error: " + e.getMessage());
}
}
}
private java.util.LinkedList<String>
strings()
{
java.util.LinkedList<String> l = new java.util.LinkedList<String>();
while(true)
{
_token = _scanner.nextToken();
if(_token.type != Token.TOK_STRING)
{
return l;
}
l.add(_token.value);
}
}
static private class ParseError extends RuntimeException
{
ParseError(String msg)
{
super(msg);
}
}
private Parser _parser;
private Scanner _scanner;
private Token _token;
}
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