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author | Jeff Johnston <jjohnstn@redhat.com> | 2002-07-17 23:25:44 +0000 |
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committer | Jeff Johnston <jjohnstn@redhat.com> | 2002-07-17 23:25:44 +0000 |
commit | dee51391315e2bb819409a6b3eb23ee6ef6d3c59 (patch) | |
tree | 17c5dc4dd302a05142ab357c745e37305c6b04ea /newlib/libc/stdio64/fgetpos64.c | |
parent | 30a431abf19a11923e53050fc94619e8705d4e50 (diff) | |
download | cygnal-dee51391315e2bb819409a6b3eb23ee6ef6d3c59.tar.gz cygnal-dee51391315e2bb819409a6b3eb23ee6ef6d3c59.tar.bz2 cygnal-dee51391315e2bb819409a6b3eb23ee6ef6d3c59.zip |
2002-07-17 Jeff Johnston <jjohnstn@redhat.com>
* configure.host(stdio64_dir): New setting that is used to
enable building of new stdio64 directory.
* libc/Makefile.am[HAVE_STDIO64_DIR]: Add support for
large files.
(stmp-stdio64,stdio64.texi): New targets to optionally add in
stdio64 info to info files.
* libc/Makefile.in: Regenerated.
* libc/configure: Ditto.
* libc/configure.in: Add configuration variables that are set
when stdio64 is selected as subdir in configure.host.
* libc/libc.texinfo: Add optional menu item for Stdio64, based
on whether STDIO64 flag is set or not.
* libc/sys.tex: Add optional stdio64 syscalls based on whether
STDIO64 flag is set or not.
* libc/include/reent.h[__LARGE64_FILES]: Add new stdio64
_r sycall routines.
* libc/include/stdio.h[__LARGE64_FILES]: Add new stdio64 prototypes.
(FILE): Typedef'd to __FILE instead of struct __sFILE directly.
(__SL64): New file flag indicating file is opened via fopen64.
* libc/include/sys/_types.h(_off64_t): Added.
* libc/include/sys/config.h: For x86-linux, define __LARGE64_FILES.
* libc/include/sys/reent.h(struct __sFILE64): New file structure
for 64-bit offset large file support.
(__FILE): New intermediate type either set to struct __sFILE64 or
struct __sFILE, depending on whether __LARGE64_FILES is set or not.
* libc/reent/Makefile.am[HAVE_STDIO64_DIR]: Add new files.
* libc/reent/Makefile.in: Regenerated.
* libc/reent/fstat64r.c: New file.
* libc/reent/lseek64r.c: Ditto.
* libc/reent/open64r.c: Ditto.
* libc/reent/reent.tex: Optionally add stdio64 reentrant syscalls
based on whether STDIO64 flag is set.
* libc/stdio/stdio.tex: Add blank line.
* libc/stdio64/Makefile.am: New file.
* libc/stdio64/Makefile.in: Ditto.
* libc/stdio64/fgetpos64.c: Ditto.
* libc/stdio64/fopen64.: Ditto.
* libc/stdio64/freopen64.c: Ditto.
* libc/stdio64/fseeko64.c: Ditto.
* libc/stdio64/fsetpos64.c: Ditto.
* libc/stdio64/ftello64.c: Ditto.
* libc/stdio64/local64.h: Ditto.
* libc/stdio64/stdio64.c: Ditto.
* libc/stdio64/stdio64.tex: Ditto.
* libc/stdio64/tmpfile64.c: Ditto.
* libc/sys/linux/io64.c: Add weak aliases for lseek64, fstat64, and
open64.
Diffstat (limited to 'newlib/libc/stdio64/fgetpos64.c')
-rw-r--r-- | newlib/libc/stdio64/fgetpos64.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/newlib/libc/stdio64/fgetpos64.c b/newlib/libc/stdio64/fgetpos64.c new file mode 100644 index 000000000..055d53655 --- /dev/null +++ b/newlib/libc/stdio64/fgetpos64.c @@ -0,0 +1,66 @@ +#ifdef __LARGE64_FILES + +/* +FUNCTION +<<fgetpos64>>---record position in a large stream or file + +INDEX + fgetpos64 + +ANSI_SYNOPSIS + #include <stdio.h> + int fgetpos64(FILE *<[fp]>, _fpos64_t *<[pos]>); + +TRAD_SYNOPSIS + #include <stdio.h> + int fgetpos64(<[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> + +int +_DEFUN (fgetpos64, (fp, pos), + FILE * fp _AND + _fpos64_t * pos) +{ + _flockfile(fp); + *pos = (_fpos64_t)ftello64 (fp); + + if (*pos != -1) + { + _funlockfile(fp); + return 0; + } + _funlockfile(fp); + return 1; +} + +#endif /* __LARGE64_FILES */ |