/* * Copyright 2003-2020 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. */ #include "TextInputStream.hxx" #include "InputStream.hxx" #include "util/TextFile.hxx" #include TextInputStream::TextInputStream(InputStreamPtr &&_is) noexcept :is(std::move(_is)) {} TextInputStream::~TextInputStream() noexcept = default; char * TextInputStream::ReadLine() { char *line = ReadBufferedLine(buffer); if (line != nullptr) return line; buffer.Shift(); while (true) { auto dest = buffer.Write(); if (dest.size < 2) { /* line too long: terminate the current line */ assert(!dest.empty()); dest[0] = 0; line = buffer.Read().data; buffer.Clear(); return line; } /* reserve one byte for the null terminator if the last line is not terminated by a newline character */ --dest.size; size_t nbytes = is->LockRead(dest.data, dest.size); buffer.Append(nbytes); line = ReadBufferedLine(buffer); if (line != nullptr) return line; if (nbytes == 0) { /* end of file: see if there's an unterminated line */ dest = buffer.Write(); assert(!dest.empty()); dest[0] = 0; auto r = buffer.Read(); buffer.Clear(); return r.empty() ? nullptr : r.data; } } }