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Diffstat (limited to 'newlib/libc/stdio64/ftello64.c')
| -rw-r--r-- | newlib/libc/stdio64/ftello64.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/newlib/libc/stdio64/ftello64.c b/newlib/libc/stdio64/ftello64.c deleted file mode 100644 index aaf0f023e..000000000 --- a/newlib/libc/stdio64/ftello64.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* -FUNCTION -<<ftello64>>---return position in a stream or file - -INDEX - ftello64 -INDEX - _ftello64_r - -ANSI_SYNOPSIS - #include <stdio.h> - _off64_t ftello64(FILE *<[fp]>); - _off64_t _ftello64_r(struct _reent *<[ptr]>, FILE *<[fp]>); - -TRAD_SYNOPSIS - #include <stdio.h> - _off64_t ftello64(<[fp]>) - FILE *<[fp]>; - - _off64_t _ftello64_r(<[ptr]>, <[fp]>) - struct _reent *<[ptr]>; - FILE *<[fp]>; - -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. - -The result of <<ftello64>> is the current position for a large file -identified by <[fp]>. If you record this result, you can later -use it with <<fseeko64>> to return the file to this -position. The difference between <<ftello>> and <<ftello64>> is that -<<ftello>> returns <<off_t>> and <<ftello64>> is designed to work -for large files (>2GB) and returns <<_off64_t>>. - -In the current implementation, <<ftello64>> simply uses a character -count to represent the file position; this is the same number that -would be recorded by <<fgetpos64>>. - -The function exists only if the __LARGE64_FILES flag is defined. -An error occurs if the <[fp]> was not opened via <<fopen64>>. - -RETURNS -<<ftello64>> returns the file position, if possible. If it cannot do -this, it returns <<-1>>. Failure occurs on streams that do not support -positioning or not opened via <<fopen64>>; the global <<errno>> indicates -this condition with the value <<ESPIPE>>. - -PORTABILITY -<<ftello64>> is a glibc extension. - -No supporting OS subroutines are required. -*/ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "%W% (Berkeley) %G%"; -#endif /* LIBC_SCCS and not lint */ - -/* - * ftello64: return current offset. - */ - -#include <stdio.h> -#include <errno.h> - -#include "local64.h" - -#ifdef __LARGE64_FILES - -_off64_t -_DEFUN (_ftello64_r, (ptr, fp), - struct _reent *ptr _AND - register FILE * fp) -{ - _fpos64_t pos; - - _flockfile(fp); - - /* Ensure stdio is set up. */ - - CHECK_INIT (fp); - - if (fp->_seek64 == NULL) - { - ptr->_errno = ESPIPE; - _funlockfile(fp); - return -1L; - } - - /* Find offset of underlying I/O object, then - adjust for buffered bytes. */ - fflush(fp); /* may adjust seek offset on append stream */ - if (fp->_flags & __SOFF) - pos = fp->_offset; - else - { - pos = (*fp->_seek64) (fp->_cookie, (_fpos64_t) 0, SEEK_CUR); - if (pos == -1L) - { - _funlockfile(fp); - return pos; - } - } - if (fp->_flags & __SRD) - { - /* - * Reading. Any unread characters (including - * those from ungetc) cause the position to be - * smaller than that in the underlying object. - */ - pos -= fp->_r; - if (HASUB (fp)) - pos -= fp->_ur; - } - else if (fp->_flags & __SWR && fp->_p != NULL) - { - /* - * Writing. Any buffered characters cause the - * position to be greater than that in the - * underlying object. - */ - pos += fp->_p - fp->_bf._base; - } - - _funlockfile(fp); - return pos; -} - -#ifndef _REENT_ONLY - -_off64_t -_DEFUN (ftello64, (fp), - register FILE * fp) -{ - return _ftello64_r (_REENT, fp); -} - -#endif /* !_REENT_ONLY */ - -#endif /* __LARGE64_FILES */ |