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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "input_file.h"
#include "log.h"
#include "os_compat.h"
static int
input_file_seek(struct input_stream *is, long offset, int whence);
static size_t
input_file_read(struct input_stream *is, void *ptr, size_t size);
static int
input_file_close(struct input_stream *is);
static int
input_file_eof(struct input_stream *is);
static int
input_file_buffer(struct input_stream *is);
int
input_file_open(struct input_stream *is, char *filename)
{
FILE *fp;
fp = fopen(filename, "r");
if (!fp) {
is->error = errno;
return -1;
}
is->seekable = 1;
fseek(fp, 0, SEEK_END);
is->size = ftell(fp);
fseek(fp, 0, SEEK_SET);
#ifdef POSIX_FADV_SEQUENTIAL
posix_fadvise(fileno(fp), (off_t)0, is->size, POSIX_FADV_SEQUENTIAL);
#endif
is->data = fp;
is->seekFunc = input_file_seek;
is->closeFunc = input_file_close;
is->readFunc = input_file_read;
is->atEOFFunc = input_file_eof;
is->bufferFunc = input_file_buffer;
is->ready = 1;
return 0;
}
static int
input_file_seek(struct input_stream *is, long offset, int whence)
{
if (fseek((FILE *) is->data, offset, whence) == 0) {
is->offset = ftell((FILE *) is->data);
} else {
is->error = errno;
return -1;
}
return 0;
}
static size_t
input_file_read(struct input_stream *is, void *ptr, size_t size)
{
size_t readSize;
readSize = fread(ptr, 1, size, (FILE *) is->data);
if (readSize <= 0 && ferror((FILE *) is->data)) {
is->error = errno;
DEBUG("input_file_read: error reading: %s\n",
strerror(is->error));
}
is->offset = ftell((FILE *) is->data);
return readSize;
}
static int
input_file_close(struct input_stream *is)
{
if (fclose((FILE *) is->data) < 0) {
is->error = errno;
return -1;
}
return 0;
}
static int
input_file_eof(struct input_stream *is)
{
if (feof((FILE *) is->data))
return 1;
if (ferror((FILE *) is->data) && is->error != EINTR) {
return 1;
}
return 0;
}
static int
input_file_buffer(mpd_unused struct input_stream *is)
{
return 0;
}
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