mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-30 19:53:46 +00:00
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<fsetpos64>>---restore position of a large stream or file
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
fsetpos64
|
||
|
|
INDEX
|
||
|
|
_fsetpos64_r
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <stdio.h>
|
||
|
|
int fsetpos64(FILE *<[fp]>, const _fpos64_t *<[pos]>);
|
||
|
|
int _fsetpos64_r(struct _reent *<[ptr]>, FILE *<[fp]>,
|
||
|
|
const _fpos64_t *<[pos]>);
|
||
|
|
|
||
|
|
TRAD_SYNOPSIS
|
||
|
|
#include <stdio.h>
|
||
|
|
int fsetpos64(<[fp]>, <[pos]>)
|
||
|
|
FILE *<[fp]>;
|
||
|
|
_fpos64_t *<[pos]>;
|
||
|
|
|
||
|
|
int _fsetpos64_r(<[ptr]>, <[fp]>, <[pos]>)
|
||
|
|
struct _reent *<[ptr]>;
|
||
|
|
FILE *<[fp]>;
|
||
|
|
_fpos64_t *<[pos]>;
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
Objects of type <<FILE>> can have a ``position'' that records how much
|
||
|
|
of the file your program has already read. Many of the <<stdio>> functions
|
||
|
|
depend on this position, and many change it as a side effect.
|
||
|
|
|
||
|
|
You can use <<fsetpos64>> to return the large file identified by <[fp]> to a
|
||
|
|
previous position <<*<[pos]>>> (after first recording it with <<fgetpos64>>).
|
||
|
|
|
||
|
|
See <<fseeko64>> for a similar facility.
|
||
|
|
|
||
|
|
RETURNS
|
||
|
|
<<fgetpos64>> returns <<0>> when successful. If <<fgetpos64>> fails, the
|
||
|
|
result is <<1>>. The reason for failure is indicated in <<errno>>:
|
||
|
|
either <<ESPIPE>> (the stream identified by <[fp]> doesn't support
|
||
|
|
64-bit repositioning) or <<EINVAL>> (invalid file position).
|
||
|
|
|
||
|
|
PORTABILITY
|
||
|
|
<<fsetpos64>> is a glibc extension.
|
||
|
|
|
||
|
|
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
|
||
|
|
<<lseek64>>, <<read>>, <<sbrk>>, <<write>>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#ifdef __LARGE64_FILES
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN (_fsetpos64_r, (ptr, iop, pos),
|
||
|
|
struct _reent *ptr _AND
|
||
|
|
FILE * iop _AND
|
||
|
|
_CONST _fpos64_t * pos)
|
||
|
|
{
|
||
|
|
int x = _fseeko64_r (ptr, iop, (_off64_t)(*pos), SEEK_SET);
|
||
|
|
|
||
|
|
if (x != 0)
|
||
|
|
return 1;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef _REENT_ONLY
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN (fsetpos64, (iop, pos),
|
||
|
|
FILE * iop _AND
|
||
|
|
_CONST _fpos64_t * pos)
|
||
|
|
{
|
||
|
|
return _fsetpos64_r (_REENT, iop, pos);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !_REENT_ONLY */
|
||
|
|
|
||
|
|
#endif /* __LARGE64_FILES */
|