diff options
Diffstat (limited to 'lib/libc/stdio/ftell.c')
| -rw-r--r-- | lib/libc/stdio/ftell.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/lib/libc/stdio/ftell.c b/lib/libc/stdio/ftell.c deleted file mode 100644 index 9b85ee0..0000000 --- a/lib/libc/stdio/ftell.c +++ /dev/null @@ -1,106 +0,0 @@ -/*- - * Copyright (c) 1990, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Chris Torek. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -#if 0 -static char sccsid[] = "@(#)ftell.c 8.2 (Berkeley) 5/4/95"; -#endif -static const char rcsid[] = - "$Id: ftell.c,v 1.7 1997/02/22 15:02:07 peter Exp $"; -#endif /* LIBC_SCCS and not lint */ - -#include <stdio.h> -#include <errno.h> -#include "local.h" -#ifdef _THREAD_SAFE -#include <pthread.h> -#include "pthread_private.h" -#endif - -/* - * ftell: return current offset. - */ -long -ftell(fp) - register FILE *fp; -{ - register fpos_t pos; - - if (fp->_seek == NULL) { - errno = ESPIPE; /* historic practice */ - return (-1L); - } - -#ifdef _THREAD_SAFE - _thread_flockfile(fp, __FILE__, __LINE__); -#endif - /* - * Find offset of underlying I/O object, then - * adjust for buffered bytes. - */ - if (fp->_flags & __SOFF) - pos = fp->_offset; - else { - pos = (*fp->_seek)(fp->_cookie, (fpos_t)0, SEEK_CUR); - if (pos == -1) { -#ifdef _THREAD_SAFE - _thread_funlockfile(fp); -#endif - 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; - } -#ifdef _THREAD_SAFE - _thread_funlockfile(fp); -#endif - return (pos); -} |
