/* * Copyright 2003-2022 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_PEEK_READER_HXX #define MPD_PEEK_READER_HXX #include "Reader.hxx" #include /** * A filter that allows the caller to peek the first few bytes without * consuming them. The first call must be Peek(), and the following * Read() will deliver the same bytes again. */ class PeekReader final : public Reader { Reader &next; size_t buffer_size = 0, buffer_position = 0; uint8_t buffer[64]; public: explicit PeekReader(Reader &_next) :next(_next) {} const void *Peek(size_t size); /* virtual methods from class Reader */ size_t Read(void *data, size_t size) override; }; #endif