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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio64/] [fgetpos64.c] - Rev 262
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/* FUNCTION <<fgetpos64>>---record position in a large stream or file INDEX fgetpos64 INDEX _fgetpos64_r ANSI_SYNOPSIS #include <stdio.h> int fgetpos64(FILE *<[fp]>, _fpos64_t *<[pos]>); int _fgetpos64_r(struct _reent *<[ptr]>, FILE *<[fp]>, _fpos64_t *<[pos]>); TRAD_SYNOPSIS #include <stdio.h> int fgetpos64(<[fp]>, <[pos]>) FILE *<[fp]>; _fpos64_t *<[pos]>; int _fgetpos64_r(<[ptr]>, <[fp]>, <[pos]>) 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 <<fgetpos64>> to report on the current position for a file identified by <[fp]> that was opened by <<fopen64>>; <<fgetpos>> will write a value representing that position at <<*<[pos]>>>. Later, you can use this value with <<fsetpos64>> to return the file to this position. In the current implementation, <<fgetpos64>> simply uses a character count to represent the file position; this is the same number that would be returned by <<ftello64>>. RETURNS <<fgetpos64>> returns <<0>> when successful. If <<fgetpos64>> fails, the result is <<1>>. Failure occurs on streams that do not support positioning or streams not opened via <<fopen64>>; the global <<errno>> indicates these conditions with the value <<ESPIPE>>. PORTABILITY <<fgetpos64>> is a glibc extension. No supporting OS subroutines are required. */ #include <stdio.h> #ifdef __LARGE64_FILES int _DEFUN (_fgetpos64_r, (ptr, fp, pos), struct _reent * ptr _AND FILE * fp _AND _fpos64_t * pos) { *pos = (_fpos64_t)_ftello64_r (ptr, fp); if (*pos != -1) { return 0; } return 1; } #ifndef _REENT_ONLY int _DEFUN (fgetpos64, (fp, pos), FILE * fp _AND _fpos64_t * pos) { return _fgetpos64_r (_REENT, fp, pos); } #endif /* !_REENT_ONLY */ #endif /* __LARGE64_FILES */
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