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/*
* Copyright (C) 2003-2011 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 "text_input_stream.h"
#include "input_stream.h"
#include "util/fifo_buffer.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
struct text_input_stream {
struct input_stream *is;
struct fifo_buffer *buffer;
char *line;
};
struct text_input_stream *
text_input_stream_new(struct input_stream *is)
{
struct text_input_stream *tis = g_new(struct text_input_stream, 1);
tis->is = is;
tis->buffer = fifo_buffer_new(4096);
tis->line = NULL;
return tis;
}
void
text_input_stream_free(struct text_input_stream *tis)
{
fifo_buffer_free(tis->buffer);
g_free(tis->line);
g_free(tis);
}
const char *
text_input_stream_read(struct text_input_stream *tis)
{
GError *error = NULL;
void *dest;
const char *src, *p;
size_t length, nbytes;
g_free(tis->line);
tis->line = NULL;
do {
dest = fifo_buffer_write(tis->buffer, &length);
if (dest != NULL && length >= 2) {
/* reserve one byte for the null terminator if
the last line is not terminated by a
newline character */
--length;
nbytes = input_stream_lock_read(tis->is, dest, length,
&error);
if (nbytes > 0)
fifo_buffer_append(tis->buffer, nbytes);
else if (error != NULL) {
g_warning("%s", error->message);
g_error_free(error);
return NULL;
}
} else
nbytes = 0;
src = fifo_buffer_read(tis->buffer, &length);
if (src == NULL)
return NULL;
p = memchr(src, '\n', length);
if (p == NULL && nbytes == 0) {
/* end of file (or line too long): terminate
the current line */
dest = fifo_buffer_write(tis->buffer, &nbytes);
assert(dest != NULL);
*(char *)dest = '\n';
fifo_buffer_append(tis->buffer, 1);
}
} while (p == NULL);
length = p - src + 1;
while (p > src && g_ascii_isspace(p[-1]))
--p;
tis->line = g_strndup(src, p - src);
fifo_buffer_consume(tis->buffer, length);
return tis->line;
}
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