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05b315770a
* libc/stdio/asprintf.c libc/stdio/clearerr.c,
libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c,
libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c,
libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c,
libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c,
libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c,
libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c,
libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c,
libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c,
libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c,
libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c,
libc/stdio/getchar.c libc/stdio/getchar_u.c,
libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c,
libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h,
libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c,
libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c,
libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c,
libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c,
libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c,
libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c,
libc/stdio/setlinebuf.c libc/stdio/setvbuf.c,
libc/stdio/siprintf.c libc/stdio/snprintf.c,
libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c,
libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c,
libc/stdio/vasprintf.c libc/stdio/vfieeefp.h,
libc/stdio/vfprintf.c libc/stdio/vfscanf.c,
libc/stdio/vprintf.c libc/stdio/vscanf.c,
libc/stdio/vsnprintf.c libc/stdio/vsprintf.c,
libc/stdio/vsscanf.c libc/stdio/wbuf.c,
libc/stdio/wsetup.c: Perform minor formatting changes. Move
copyright notices to top of file, ensure that <_ansi.h> is
included, be consistent with open parentheses, use _DEFUN macro,
include "local.h" where needed, and remove various compiler
warnings.
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<fgetpos>>---record position in a stream or file
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INDEX
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fgetpos
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INDEX
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_fgetpos_r
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ANSI_SYNOPSIS
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#include <stdio.h>
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int fgetpos(FILE *<[fp]>, fpos_t *<[pos]>);
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int _fgetpos_r(struct _reent *<[ptr]>, FILE *<[fp]>, fpos_t *<[pos]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int fgetpos(<[fp]>, <[pos]>)
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FILE *<[fp]>;
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fpos_t *<[pos]>;
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int _fgetpos_r(<[ptr]>, <[fp]>, <[pos]>)
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struct _reent *<[ptr]>;
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FILE *<[fp]>;
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fpos_t *<[pos]>;
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DESCRIPTION
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Objects of type <<FILE>> can have a ``position'' that records how much
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of the file your program has already read. Many of the <<stdio>> functions
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depend on this position, and many change it as a side effect.
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You can use <<fgetpos>> to report on the current position for a file
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identified by <[fp]>; <<fgetpos>> will write a value
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representing that position at <<*<[pos]>>>. Later, you can
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use this value with <<fsetpos>> to return the file to this
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position.
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In the current implementation, <<fgetpos>> simply uses a character
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count to represent the file position; this is the same number that
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would be returned by <<ftell>>.
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RETURNS
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<<fgetpos>> returns <<0>> when successful. If <<fgetpos>> fails, the
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result is <<1>>. Failure occurs on streams that do not support
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positioning; the global <<errno>> indicates this condition with the
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value <<ESPIPE>>.
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PORTABILITY
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<<fgetpos>> is required by the ANSI C standard, but the meaning of the
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value it records is not specified beyond requiring that it be
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acceptable as an argument to <<fsetpos>>. In particular, other
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conforming C implementations may return a different result from
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<<ftell>> than what <<fgetpos>> writes at <<*<[pos]>>>.
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No supporting OS subroutines are required.
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*/
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#include <_ansi.h>
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#include <reent.h>
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#include <stdio.h>
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int
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_DEFUN(_fgetpos_r, (ptr, fp, pos),
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struct _reent * ptr _AND
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FILE * fp _AND
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_fpos_t * pos)
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{
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_flockfile (fp);
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*pos = _ftell_r (ptr, fp);
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if (*pos != -1)
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{
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_funlockfile (fp);
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return 0;
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}
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_funlockfile (fp);
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return 1;
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}
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#ifndef _REENT_ONLY
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int
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_DEFUN(fgetpos, (fp, pos),
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FILE * fp _AND
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_fpos_t * pos)
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{
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return _fgetpos_r (_REENT, fp, pos);
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}
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#endif /* !_REENT_ONLY */
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