Keith Marshall
keith****@users*****
Tue Apr 17 21:11:29 JST 2018
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On 17/04/18 11:38, Keith Marshall wrote:
> A possibly more robust implementation of _fseeki64(), suitable for
> use on any Windows version prior to Vista, may be:
>
> __CRT_ALIAS __int64 _fseeki64 ( FILE *__file, __int64 __pos, int
> __whence ) { fseek( __file, 0, SEEK_CUR ); return _lseeki64(
> _fileno(__file), __pos, __whence ); }
Actually, not quite correct; the return type and value should *not*
match those of _lseeki64(). It should rather be:
__CRT_ALIAS int _fseeki64
( FILE *__file, __int64 __pos, int __whence )
{
return (fseek( __file, 0, SEEK_CUR ) == 0)
? (_lseeki64( _fileno(__file), __pos, __whence ) == -1LL)
? -1
: 0
: -1;
}
and fseeko64() could simply become:
__CRT_ALIAS int fseeko64
( FILE *__file, __off64_t __pos, int __whence )
{ return _fseeki64( __file, (__int64)__pos, __whence ); }
- --
Regards,
Keith.
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Key fingerprint: C19E C018 1547 DE50 E1D4 8F53 C0AD 36C6 347E 5A3F
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