mirror of
https://github.com/mpv-player/mpv
synced 2024-12-16 11:55:42 +00:00
7db81061d7
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@21874 b3059339-0415-0410-9bf9-f77b7e298cf2
68 lines
1.2 KiB
C
68 lines
1.2 KiB
C
/*
|
|
* fseeko.c
|
|
* 64-bit versions of fseeko/ftello() for systems which do not have them
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef WIN32
|
|
#define flockfile
|
|
#define funlockfile
|
|
#endif
|
|
|
|
/*
|
|
* On BSD/OS and NetBSD (and perhaps others), off_t and fpos_t are the
|
|
* same. Standards say off_t is an arithmetic type, but not necessarily
|
|
* integral, while fpos_t might be neither.
|
|
*
|
|
* This is thread-safe on BSD/OS using flockfile/funlockfile.
|
|
*/
|
|
|
|
int
|
|
fseeko(FILE *stream, off_t offset, int whence)
|
|
{
|
|
fpos_t floc;
|
|
struct stat filestat;
|
|
|
|
switch (whence)
|
|
{
|
|
case SEEK_CUR:
|
|
flockfile(stream);
|
|
if (fgetpos(stream, &floc) != 0)
|
|
goto failure;
|
|
floc += offset;
|
|
if (fsetpos(stream, &floc) != 0)
|
|
goto failure;
|
|
funlockfile(stream);
|
|
return 0;
|
|
break;
|
|
case SEEK_SET:
|
|
if (fsetpos(stream, &offset) != 0)
|
|
return -1;
|
|
return 0;
|
|
break;
|
|
case SEEK_END:
|
|
flockfile(stream);
|
|
if (fstat(fileno(stream), &filestat) != 0)
|
|
goto failure;
|
|
floc = filestat.st_size;
|
|
if (fsetpos(stream, &floc) != 0)
|
|
goto failure;
|
|
funlockfile(stream);
|
|
return 0;
|
|
break;
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
failure:
|
|
funlockfile(stream);
|
|
return -1;
|
|
}
|