/*
  * Buffered file io for ffmpeg system

  * Copyright (c) 2001 Fabrice Bellard

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg 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
  * Lesser General Public License for more details.

  *

  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 
 #include "libavutil/avstring.h"

 #include "avformat.h"

 #include <fcntl.h>

 #if HAVE_SETMODE

 #include <io.h>
 #endif

 #include <unistd.h>

 #include <sys/time.h>

 #include <stdlib.h>

 #include "os_support.h"

 
 
 /* standard file protocol */
 
 static int file_open(URLContext *h, const char *filename, int flags)
 {
     int access;
     int fd;
 

     av_strstart(filename, "file:", &filename);

     if (flags & URL_RDWR) {
         access = O_CREAT | O_TRUNC | O_RDWR;
     } else if (flags & URL_WRONLY) {

         access = O_CREAT | O_TRUNC | O_WRONLY;
     } else {
         access = O_RDONLY;
     }

 #ifdef O_BINARY

     access |= O_BINARY;
 #endif

     fd = open(filename, access, 0666);
     if (fd < 0)

         return AVERROR(ENOENT);

     h->priv_data = (void *)(size_t)fd;

     return 0;
 }
 
 static int file_read(URLContext *h, unsigned char *buf, int size)
 {

     int fd = (size_t)h->priv_data;

     return read(fd, buf, size);
 }
 
 static int file_write(URLContext *h, unsigned char *buf, int size)
 {

     int fd = (size_t)h->priv_data;

     return write(fd, buf, size);
 }
 
 /* XXX: use llseek */

 static int64_t file_seek(URLContext *h, int64_t pos, int whence)

 {

     int fd = (size_t)h->priv_data;

     return lseek(fd, pos, whence);
 }
 
 static int file_close(URLContext *h)
 {

     int fd = (size_t)h->priv_data;

     return close(fd);
 }
 
 URLProtocol file_protocol = {
     "file",
     file_open,
     file_read,
     file_write,
     file_seek,
     file_close,
 };
 
 /* pipe protocol */
 
 static int pipe_open(URLContext *h, const char *filename, int flags)
 {
     int fd;

     char *final;

     av_strstart(filename, "pipe:", &filename);

     fd = strtol(filename, &final, 10);
     if((filename == final) || *final ) {/* No digits found, or something like 10ab */

         if (flags & URL_WRONLY) {
             fd = 1;
         } else {
             fd = 0;
         }

     }

 #if HAVE_SETMODE

     setmode(fd, O_BINARY);
 #endif

     h->priv_data = (void *)(size_t)fd;

     h->is_streamed = 1;

     return 0;
 }
 
 URLProtocol pipe_protocol = {
     "pipe",
     pipe_open,

     file_read,
     file_write,

 };