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138 lines
3.4 KiB
C++
138 lines
3.4 KiB
C++
//
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// StringTokenizer.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/StringTokenizer.h#1 $
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//
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// Library: Foundation
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// Package: Core
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// Module: StringTokenizer
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//
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// Definition of the StringTokenizer class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_StringTokenizer_INCLUDED
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#define Foundation_StringTokenizer_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Exception.h"
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#include <vector>
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#include <cstddef>
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namespace Poco {
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class Foundation_API StringTokenizer
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/// A simple tokenizer that splits a string into
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/// tokens, which are separated by separator characters.
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/// An iterator is used to iterate over all tokens.
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{
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public:
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enum Options
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{
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TOK_IGNORE_EMPTY = 1, /// ignore empty tokens
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TOK_TRIM = 2 /// remove leading and trailing whitespace from tokens
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};
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typedef std::vector<std::string> TokenVec;
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typedef TokenVec::const_iterator Iterator;
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StringTokenizer(const std::string& str, const std::string& separators, int options = 0);
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/// Splits the given string into tokens. The tokens are expected to be
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/// separated by one of the separator characters given in separators.
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/// Additionally, options can be specified:
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/// * TOK_IGNORE_EMPTY: empty tokens are ignored
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/// * TOK_TRIM: trailing and leading whitespace is removed from tokens.
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~StringTokenizer();
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/// Destroys the tokenizer.
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Iterator begin() const;
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Iterator end() const;
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const std::string& operator [] (std::size_t index) const;
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/// Returns const reference the index'th token.
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/// Throws a RangeException if the index is out of range.
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std::string& operator [] (std::size_t index);
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/// Returns reference to the index'th token.
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/// Throws a RangeException if the index is out of range.
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bool has(const std::string& token) const;
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/// Returns true if token exists, false otherwise.
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std::size_t find(const std::string& token, std::size_t pos = 0) const;
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/// Returns the index of the first occurence of the token
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/// starting at position pos.
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/// Throws a NotFoundException if the token is not found.
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std::size_t replace(const std::string& oldToken, const std::string& newToken, std::size_t pos = 0);
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/// Starting at position pos, replaces all subsequent tokens having value
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/// equal to oldToken with newToken.
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/// Returns the number of modified tokens.
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std::size_t count() const;
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/// Returns the total number of tokens.
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std::size_t count(const std::string& token) const;
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/// Returns the number of tokens equal to the specified token.
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private:
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StringTokenizer(const StringTokenizer&);
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StringTokenizer& operator = (const StringTokenizer&);
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void trim (std::string& token);
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TokenVec _tokens;
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};
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//
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// inlines
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//
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inline StringTokenizer::Iterator StringTokenizer::begin() const
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{
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return _tokens.begin();
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}
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inline StringTokenizer::Iterator StringTokenizer::end() const
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{
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return _tokens.end();
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}
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inline std::string& StringTokenizer::operator [] (std::size_t index)
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{
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if (index >= _tokens.size()) throw RangeException();
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return _tokens[index];
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}
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inline const std::string& StringTokenizer::operator [] (std::size_t index) const
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{
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if (index >= _tokens.size()) throw RangeException();
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return _tokens[index];
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}
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inline std::size_t StringTokenizer::count() const
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{
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return _tokens.size();
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}
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} // namespace Poco
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#endif // Foundation_StringTokenizer_INCLUDED
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