Commit f9c4d88b authored by Max Kellermann's avatar Max Kellermann

fs/io/TextFile: add interface LineReader

parent 79903250
/*
* Copyright 2003-2021 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.
*/
#pragma once
class LineReader
{
public:
/**
* Reads a line from the input file, and strips trailing
* space. There is a reasonable maximum line length, only to
* prevent denial of service.
*
* @return a pointer to the line, or nullptr on end-of-file
*/
virtual char *ReadLine() = 0;
};
...@@ -20,6 +20,7 @@ ...@@ -20,6 +20,7 @@
#ifndef MPD_TEXT_FILE_HXX #ifndef MPD_TEXT_FILE_HXX
#define MPD_TEXT_FILE_HXX #define MPD_TEXT_FILE_HXX
#include "LineReader.hxx"
#include "config.h" #include "config.h"
#include <memory> #include <memory>
...@@ -29,7 +30,7 @@ class FileReader; ...@@ -29,7 +30,7 @@ class FileReader;
class AutoGunzipReader; class AutoGunzipReader;
class BufferedReader; class BufferedReader;
class TextFile { class TextFile final : public LineReader {
const std::unique_ptr<FileReader> file_reader; const std::unique_ptr<FileReader> file_reader;
#ifdef ENABLE_ZLIB #ifdef ENABLE_ZLIB
...@@ -45,14 +46,8 @@ public: ...@@ -45,14 +46,8 @@ public:
~TextFile() noexcept; ~TextFile() noexcept;
/** /* virtual methods from class LineReader */
* Reads a line from the input file, and strips trailing char *ReadLine() override;
* space. There is a reasonable maximum line length, only to
* prevent denial of service.
*
* @return a pointer to the line, or nullptr on end-of-file
*/
char *ReadLine();
}; };
#endif #endif
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