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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_TOKENIZER_HXX
#define MPD_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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