98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
/*
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* Copyright (C) 2009-2014 Max Kellermann <max.kellermann@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TOKENIZER_HXX
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#define TOKENIZER_HXX
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class Tokenizer {
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char *input;
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public:
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/**
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* @param _input the input string; the contents will be
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* modified by this class
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*/
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constexpr Tokenizer(char *_input):input(_input) {}
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Tokenizer(const Tokenizer &) = delete;
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Tokenizer &operator=(const Tokenizer &) = delete;
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char *Rest() {
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return input;
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}
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char CurrentChar() const {
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return *input;
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}
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bool IsEnd() const {
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return CurrentChar() == 0;
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}
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/**
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* Reads the next word. Throws std::runtime_error on error.
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*
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* @return a pointer to the null-terminated word, or nullptr
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* on end of line
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*/
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char *NextWord();
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/**
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* Reads the next unquoted word from the input string. Throws
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* std::runtime_error on error.
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*
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* @return a pointer to the null-terminated word, or nullptr
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* on end of line
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*/
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char *NextUnquoted();
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/**
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* Reads the next quoted string from the input string. A
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* backslash escapes the following character. This function
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* modifies the input string. Throws std::runtime_error on
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* error.
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*
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* @return a pointer to the null-terminated string, or nullptr
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* end of line
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*/
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char *NextString();
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/**
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* Reads the next unquoted word or quoted string from the
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* input. This is a wrapper for NextUnquoted() and
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* NextString(). Throws std::runtime_error on error.
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*
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* @return a pointer to the null-terminated string, or nullptr
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* on end of line
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*/
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char *NextParam();
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};
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#endif
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