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9fc9e1c916
* libc/include/sys/reent.h: Add _GLOBAL_REENT macro. * libc/stdio: Globally remove/replace all references to fp->_data. Replace with _REENT or _GLOBAL_REENT where appropriate. * libc/stdio/asprintf.c: Ditto. * libc/stdio/fclose.c: Ditto. * libc/stdio/fvwrite.c: Ditto. * libc/stdio/makebuf.c: Ditto. * libc/stdio/refill.c: Ditto. * libc/stdio/local.h: Ditto. * libc/stdio/setvbuf.c: Ditto. * libc/stdio/sscanf.c: Ditto. * libc/stdio/stdio.c: Ditto. * libc/stdio/ungetc.c: Ditto. * libc/stdio/vfscanf.c: Ditto. * libc/stdio/vsscanf.c: Ditto. * libc/stdio/fopen.c: Ditto. Also use _fseek_r in _fopen_r. * libc/stdio/vasprintf.c: Ditto. Also call _vfprintf_r directly. * libc/stdio/vsnprintf.c: Ditto. * libc/stdio/vsprintf.c: Ditto. * libc/stdio/fcloseall.c(fcloseall): Use _GLOBAL_REENT macro instead of _REENT to walk file list. * libc/stdio/fflush.c: Ditto. * libc/stdio/fgetpos.c: Add reentrant version and have regular version call reentrant version with _REENT argument. * libc/stdio/fsetpos.c: Ditto. * libc/stdio/fseek.c: Ditto. * libc/stdio/fseeko.c: Ditto. * libc/stdio/ftell.c: Ditto. * libc/stdio/ftello.c: Ditto. * libc/stdio/freopen.c: Ditto. * libc/stdio/findfp.c: Use _GLOBAL_REENT pointer when adding new files to chain. Also use _GLOBAL_REENT pointer for cleaning up. * libc/stdio/fiprintf.c: Reformatted to minimize duplicate code. * libc/stdio/siprintf.c: Ditto. * libc/stdio/iprintf.c: Ditto. * libc/stdio/fprintf.c: Ditto. * libc/stdio/printf.c: Ditto. * libc/stdio/snprintf.c: Call _vfprintf_r directly. * libc/stdio/sprintf.c: Ditto. * libc/stdio/vprintf.c: Ditto. Also add _REENT_ONLY check. * libc/stdio/rewind.c: Call _fseek_r directly. * libc/stdio/tmpfile.c: Call _fopen_r and _remove_r directly. * libc/stdio/vfprintf.c (_VFPRINTF_R): Change _r routines to use data pointer. (get_arg): Add extra struct _reent pointer argument. * libc/stdio64/fgetpos64.c: Add _r versions, remove any reference to fp->_data. * libc/stdio64/fopen64.c: Ditto. * libc/stdio64/freopen64.c: Ditto. * libc/stdio64/fsetpos64.c: Ditto. * libc/stdio64/ftello64.c: Ditto. * libc/stdio64/local64.h: Ditto. * libc/stdio64/stdio64.c: Ditto. * libc/stdio64/fseeko64.c: Ditto plus use _fstat_r instead of _fstat64_r for the meantime.
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
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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 <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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