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