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/*
* Copyright (C) 2003-2015 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 "config.h"
#include "BufferedReader.hxx"
#include "Reader.hxx"
#include "util/TextFile.hxx"
bool
BufferedReader::Fill(bool need_more)
{
if (gcc_unlikely(last_error.IsDefined()))
return false;
if (eof)
return !need_more;
auto w = buffer.Write();
if (w.IsEmpty()) {
if (buffer.GetCapacity() >= MAX_SIZE)
return !need_more;
buffer.Grow(buffer.GetCapacity() * 2);
w = buffer.Write();
assert(!w.IsEmpty());
}
size_t nbytes = reader.Read(w.data, w.size, last_error);
if (nbytes == 0) {
if (gcc_unlikely(last_error.IsDefined()))
return false;
eof = true;
return !need_more;
}
buffer.Append(nbytes);
return true;
}
char *
BufferedReader::ReadLine()
{
do {
char *line = ReadBufferedLine(buffer);
if (line != nullptr) {
++line_number;
return line;
}
} while (Fill(true));
if (last_error.IsDefined() || !eof || buffer.IsEmpty())
return nullptr;
auto w = buffer.Write();
if (w.IsEmpty()) {
buffer.Grow(buffer.GetCapacity() + 1);
w = buffer.Write();
assert(!w.IsEmpty());
}
/* terminate the last line */
w[0] = 0;
char *line = buffer.Read().data;
buffer.Clear();
++line_number;
return line;
}
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