100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_TOKENIZER_HXX
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#define MPD_TOKENIZER_HXX
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class Error;
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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.
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*
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* @param error if this function returns nullptr and
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* **input_p!=0, it provides an #Error object in
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* this argument
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* @return a pointer to the null-terminated word, or nullptr
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* on error or end of line
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*/
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char *NextWord(Error &error);
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/**
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* Reads the next unquoted word from the input string.
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*
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* @param error_r if this function returns nullptr and **input_p!=0, it
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* provides an #Error object in this argument
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* @return a pointer to the null-terminated word, or nullptr
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* on error or end of line
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*/
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char *NextUnquoted(Error &error);
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/**
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* Reads the next quoted string from the input string. A backslash
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* escapes the following character. This function modifies the input
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* string.
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*
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* @param input_p the input string; this function returns a pointer to
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* the first non-whitespace character of the following token
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* @param error_r if this function returns nullptr and **input_p!=0, it
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* provides an #Error object in this argument
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* @return a pointer to the null-terminated string, or nullptr on error
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* or end of line
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*/
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char *NextString(Error &error);
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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().
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*
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* @param error_r if this function returns nullptr and
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* **input_p!=0, it provides an #Error object in
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* this argument
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* @return a pointer to the null-terminated string, or nullptr
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* on error or end of line
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*/
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char *NextParam(Error &error);
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};
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#endif
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