mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-25 17:10:59 +01:00
120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
//
|
|
// StreamTokenizer.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/StreamTokenizer.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Streams
|
|
// Module: StreamTokenizer
|
|
//
|
|
// Definition of the StreamTokenizer class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Foundation_StreamTokenizer_INCLUDED
|
|
#define Foundation_StreamTokenizer_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/Token.h"
|
|
#include <istream>
|
|
#include <vector>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class Foundation_API StreamTokenizer
|
|
/// A stream tokenizer splits an input stream
|
|
/// into a sequence of tokens of different kinds.
|
|
/// Various token kinds can be registered with
|
|
/// the tokenizer.
|
|
{
|
|
public:
|
|
StreamTokenizer();
|
|
/// Creates a StreamTokenizer with no attached stream.
|
|
|
|
StreamTokenizer(std::istream& istr);
|
|
/// Creates a StreamTokenizer with no attached stream.
|
|
|
|
virtual ~StreamTokenizer();
|
|
/// Destroys the StreamTokenizer and deletes all
|
|
/// registered tokens.
|
|
|
|
void attachToStream(std::istream& istr);
|
|
/// Attaches the tokenizer to an input stream.
|
|
|
|
void addToken(Token* pToken);
|
|
/// Adds a token class to the tokenizer. The
|
|
/// tokenizer takes ownership of the token and
|
|
/// deletes it when no longer needed. Comment
|
|
/// and whitespace tokens will be marked as
|
|
/// ignorable, which means that next() will not
|
|
/// return them.
|
|
|
|
void addToken(Token* pToken, bool ignore);
|
|
/// Adds a token class to the tokenizer. The
|
|
/// tokenizer takes ownership of the token and
|
|
/// deletes it when no longer needed.
|
|
/// If ignore is true, the token will be marked
|
|
/// as ignorable, which means that next() will
|
|
/// not return it.
|
|
|
|
const Token* next();
|
|
/// Extracts the next token from the input stream.
|
|
/// Returns a pointer to an EOFToken if there are
|
|
/// no more characters to read.
|
|
/// Returns a pointer to an InvalidToken if an
|
|
/// invalid character is encountered.
|
|
/// If a token is marked as ignorable, it will not
|
|
/// be returned, and the next token will be
|
|
/// examined.
|
|
/// Never returns a NULL pointer.
|
|
/// You must not delete the token returned by next().
|
|
|
|
private:
|
|
struct TokenInfo
|
|
{
|
|
Token* pToken;
|
|
bool ignore;
|
|
};
|
|
|
|
typedef std::vector<TokenInfo> TokenVec;
|
|
|
|
TokenVec _tokens;
|
|
std::istream* _pIstr;
|
|
InvalidToken _invalidToken;
|
|
EOFToken _eofToken;
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_StreamTokenizer_INCLUDED
|