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/*
* Copyright (C) 2003-2014 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 "TextInputStream.hxx"
#include "InputStream.hxx"
#include "util/CharUtil.hxx"
#include "util/Error.hxx"
#include "Log.hxx"
#include <assert.h>
#include <string.h>
char *
TextInputStream::ReadLine()
{
char *src, *p;
do {
size_t nbytes;
auto dest = buffer.Write();
if (dest.size >= 2) {
/* reserve one byte for the null terminator if
the last line is not terminated by a
newline character */
--dest.size;
Error error;
nbytes = is.LockRead(dest.data, dest.size, error);
if (nbytes > 0)
buffer.Append(nbytes);
else if (error.IsDefined()) {
LogError(error);
return nullptr;
}
} else
nbytes = 0;
auto src_p = buffer.Read();
if (src_p.IsEmpty())
return nullptr;
src = src_p.data;
p = reinterpret_cast<char*>(memchr(src, '\n', src_p.size));
if (p == nullptr && nbytes == 0) {
/* end of file (or line too long): terminate
the current line */
dest = buffer.Write();
assert(!dest.IsEmpty());
dest[0] = 0;
buffer.Clear();
return src;
}
} while (p == nullptr);
buffer.Consume(p - src + 1);
while (p > src && IsWhitespaceOrNull(p[-1]))
--p;
*p = 0;
return src;
}
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