mirror of
https://gitlab.com/mbunkus/mkvtoolnix.git
synced 2024-10-22 07:21:21 +00:00
8bcc286dfc
It is dangerous insofar as it pollutes an immense number of source files. For example, utf8cpp's stuff uses relative namespace names (e.g. `utf8::some_type`). If `using namespace libebml` is in effect, then this clashes with `libebml::utf8` which is a typedef for `unsigned char`, causing compiler errors.
156 lines
3.4 KiB
C++
156 lines
3.4 KiB
C++
/*
|
|
* libxio.c
|
|
*
|
|
* Copyright (C) Lukas Hejtmanek - January 2004
|
|
*
|
|
* This file is part of transcode, a linux video stream processing tool
|
|
*
|
|
* transcode 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, or (at your option)
|
|
* any later version.
|
|
*
|
|
* transcode 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 GNU Make; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#include "common/common_pch.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#if defined(HAVE_UNISTD_H)
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "common/mm_io.h"
|
|
|
|
#include "xio.h"
|
|
|
|
#define MAX_INSTANCES 4000
|
|
|
|
static mm_io_c *instances[MAX_INSTANCES];
|
|
static bool instances_initialized = false;
|
|
|
|
int
|
|
xio_open(void *pathname,
|
|
int,
|
|
...) {
|
|
int i, idx;
|
|
|
|
if (!instances_initialized) {
|
|
memset(instances, 0, MAX_INSTANCES * sizeof(mm_io_c *));
|
|
instances_initialized = true;
|
|
}
|
|
|
|
idx = -1;
|
|
for (i = 0; i < MAX_INSTANCES; i++)
|
|
if (instances[i] == NULL) {
|
|
idx = i;
|
|
break;
|
|
}
|
|
|
|
if (idx == -1)
|
|
return -1;
|
|
|
|
instances[idx] = static_cast<mm_io_c *>(pathname);
|
|
|
|
return idx;
|
|
}
|
|
|
|
ssize_t
|
|
xio_read(int fd,
|
|
void *buf,
|
|
size_t count) {
|
|
if ((fd < 0) || (fd >= MAX_INSTANCES) || (instances[fd] == NULL))
|
|
return -1;
|
|
return instances[fd]->read(buf, count);
|
|
}
|
|
|
|
ssize_t
|
|
xio_write(int fd,
|
|
const void *buf,
|
|
size_t count) {
|
|
if ((fd < 0) || (fd >= MAX_INSTANCES) || (instances[fd] == NULL))
|
|
return -1;
|
|
return instances[fd]->write(buf, count);
|
|
}
|
|
|
|
int
|
|
xio_ftruncate(int fd,
|
|
int64_t length) {
|
|
if ((fd < 0) || (fd >= MAX_INSTANCES) || (instances[fd] == NULL))
|
|
return -1;
|
|
return instances[fd]->truncate(length);
|
|
}
|
|
|
|
int64_t
|
|
xio_lseek(int fd,
|
|
int64_t offset,
|
|
int whence) {
|
|
uint64_t expected_pos;
|
|
libebml::seek_mode smode;
|
|
|
|
if ((fd < 0) || (fd >= MAX_INSTANCES) || (instances[fd] == NULL))
|
|
return (int64_t)-1;
|
|
if (whence == SEEK_SET) {
|
|
smode = libebml::seek_beginning;
|
|
expected_pos = offset;
|
|
} else if (whence == SEEK_END) {
|
|
smode = libebml::seek_end;
|
|
expected_pos = instances[fd]->get_size() - offset;
|
|
} else {
|
|
smode = libebml::seek_current;
|
|
expected_pos = instances[fd]->getFilePointer() + offset;
|
|
}
|
|
instances[fd]->setFilePointer(offset, smode);
|
|
if (instances[fd]->getFilePointer() != expected_pos)
|
|
return (int64_t)-1;
|
|
return expected_pos;
|
|
}
|
|
|
|
int
|
|
xio_close(int fd) {
|
|
if ((fd < 0) || (fd >= MAX_INSTANCES) || (instances[fd] == NULL))
|
|
return -1;
|
|
instances[fd] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xio_stat(const char *,
|
|
struct stat *) {
|
|
// Not implemented for mkvtoolnix.
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
xio_lstat(const char *,
|
|
struct stat *) {
|
|
// Not implemented for mkvtoolnix.
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
xio_rename(const char *oldpath,
|
|
const char *newpath) {
|
|
return rename(oldpath, newpath);
|
|
}
|
|
|
|
int
|
|
xio_fstat(int,
|
|
struct stat *) {
|
|
// Not implemented for mkvtoolnix.
|
|
return -1;
|
|
}
|