os2 support patch by ("Slavik Gnatenko" <miracle9 at newmail dot ru>)
[libav.git] / libavformat / file.c
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1/*
2 * Buffered file io for ffmpeg system
19720f15 3 * Copyright (c) 2001 Fabrice Bellard
de6d9b64 4 *
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5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
de6d9b64 9 *
19720f15 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
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15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 18 */
8be1c656 19#include "avformat.h"
de6d9b64 20#include <fcntl.h>
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21#ifndef CONFIG_WIN32
22#include <unistd.h>
de6d9b64 23#include <sys/ioctl.h>
de6d9b64 24#include <sys/time.h>
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25#else
26#include <io.h>
27#define open(fname,oflag,pmode) _open(fname,oflag,pmode)
28#endif /* CONFIG_WIN32 */
de6d9b64 29
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30
31/* standard file protocol */
32
33static int file_open(URLContext *h, const char *filename, int flags)
34{
35 int access;
36 int fd;
37
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38 strstart(filename, "file:", &filename);
39
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40 if (flags & URL_WRONLY) {
41 access = O_CREAT | O_TRUNC | O_WRONLY;
42 } else {
43 access = O_RDONLY;
44 }
f3ec2d46 45#if defined(CONFIG_WIN32) || defined(CONFIG_OS2)
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46 access |= O_BINARY;
47#endif
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48 fd = open(filename, access, 0666);
49 if (fd < 0)
50 return -ENOENT;
51 h->priv_data = (void *)fd;
52 return 0;
53}
54
55static int file_read(URLContext *h, unsigned char *buf, int size)
56{
57 int fd = (int)h->priv_data;
58 return read(fd, buf, size);
59}
60
61static int file_write(URLContext *h, unsigned char *buf, int size)
62{
63 int fd = (int)h->priv_data;
64 return write(fd, buf, size);
65}
66
67/* XXX: use llseek */
68static offset_t file_seek(URLContext *h, offset_t pos, int whence)
69{
70 int fd = (int)h->priv_data;
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71#ifdef CONFIG_WIN32
72 return _lseeki64(fd, pos, whence);
73#else
de6d9b64 74 return lseek(fd, pos, whence);
8be1c656 75#endif
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76}
77
78static int file_close(URLContext *h)
79{
80 int fd = (int)h->priv_data;
81 return close(fd);
82}
83
84URLProtocol file_protocol = {
85 "file",
86 file_open,
87 file_read,
88 file_write,
89 file_seek,
90 file_close,
91};
92
93/* pipe protocol */
94
95static int pipe_open(URLContext *h, const char *filename, int flags)
96{
97 int fd;
98
99 if (flags & URL_WRONLY) {
100 fd = 1;
101 } else {
102 fd = 0;
103 }
104 h->priv_data = (void *)fd;
105 return 0;
106}
107
108static int pipe_read(URLContext *h, unsigned char *buf, int size)
109{
110 int fd = (int)h->priv_data;
111 return read(fd, buf, size);
112}
113
114static int pipe_write(URLContext *h, unsigned char *buf, int size)
115{
116 int fd = (int)h->priv_data;
117 return write(fd, buf, size);
118}
119
120static int pipe_close(URLContext *h)
121{
122 return 0;
123}
124
125URLProtocol pipe_protocol = {
126 "pipe",
127 pipe_open,
128 pipe_read,
129 pipe_write,
130 NULL,
131 pipe_close,
132};