From 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc Mon Sep 17 00:00:00 2001 From: Christopher Faylor Date: Thu, 17 Feb 2000 19:39:52 +0000 Subject: import newlib-2000-02-17 snapshot --- newlib/libc/stdio/fgetpos.c | 61 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 newlib/libc/stdio/fgetpos.c (limited to 'newlib/libc/stdio/fgetpos.c') diff --git a/newlib/libc/stdio/fgetpos.c b/newlib/libc/stdio/fgetpos.c new file mode 100644 index 000000000..214021a84 --- /dev/null +++ b/newlib/libc/stdio/fgetpos.c @@ -0,0 +1,61 @@ +/* +FUNCTION +<>---record position in a stream or file + +INDEX + fgetpos + +ANSI_SYNOPSIS + #include + int fgetpos(FILE *<[fp]>, fpos_t *<[pos]>); + +TRAD_SYNOPSIS + #include + int fgetpos(<[fp]>, <[pos]>) + FILE *<[fp]>; + fpos_t *<[pos]>; + +DESCRIPTION +Objects of type <> can have a ``position'' that records how much +of the file your program has already read. Many of the <> functions +depend on this position, and many change it as a side effect. + +You can use <> to report on the current position for a file +identified by <[fp]>; <> will write a value +representing that position at <<*<[pos]>>>. Later, you can +use this value with <> to return the file to this +position. + +In the current implementation, <> simply uses a character +count to represent the file position; this is the same number that +would be returned by <>. + +RETURNS +<> returns <<0>> when successful. If <> fails, the +result is <<1>>. Failure occurs on streams that do not support +positioning; the global <> indicates this condition with the +value <>. + +PORTABILITY +<> is required by the ANSI C standard, but the meaning of the +value it records is not specified beyond requiring that it be +acceptable as an argument to <>. In particular, other +conforming C implementations may return a different result from +<> than what <> writes at <<*<[pos]>>>. + +No supporting OS subroutines are required. +*/ + +#include + +int +_DEFUN (fgetpos, (fp, pos), + FILE * fp _AND + fpos_t * pos) +{ + *pos = ftell (fp); + + if (*pos != -1) + return 0; + return 1; +} -- cgit v1.2.3