/*
* Copyright (C) 2003-2013 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/fifo_buffer.h"
#include "util/Error.hxx"
#include <glib.h>
#include <assert.h>
#include <string.h>
TextInputStream::TextInputStream(struct input_stream *_is)
: is(_is),
buffer(fifo_buffer_new(4096))
{
}
TextInputStream::~TextInputStream()
{
fifo_buffer_free(buffer);
}
bool TextInputStream::ReadLine(std::string &line)
{
void *dest;
const char *src, *p;
size_t length, nbytes;
do {
dest = fifo_buffer_write(buffer, &length);
if (dest != nullptr && length >= 2) {
/* reserve one byte for the null terminator if
the last line is not terminated by a
newline character */
--length;
Error error;
nbytes = is->LockRead(dest, length, error);
if (nbytes > 0)
fifo_buffer_append(buffer, nbytes);
else if (error.IsDefined()) {
g_warning("%s", error.GetMessage());
return false;
}
} else
nbytes = 0;
auto src_p = fifo_buffer_read(buffer, &length);
src = reinterpret_cast<const char *>(src_p);
if (src == nullptr)
return false;
p = reinterpret_cast<const char*>(memchr(src, '\n', length));
if (p == nullptr && nbytes == 0) {
/* end of file (or line too long): terminate
the current line */
dest = fifo_buffer_write(buffer, &nbytes);
assert(dest != nullptr);
*(char *)dest = '\n';
fifo_buffer_append(buffer, 1);
}
} while (p == nullptr);
length = p - src + 1;
while (p > src && g_ascii_isspace(p[-1]))
--p;
line = std::string(src, p - src);
fifo_buffer_consume(buffer, length);
return true;
}
