diff options
Diffstat (limited to 'lib/libc/stdio/ftell.c')
| -rw-r--r-- | lib/libc/stdio/ftell.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/lib/libc/stdio/ftell.c b/lib/libc/stdio/ftell.c deleted file mode 100644 index a9ff6ed..0000000 --- a/lib/libc/stdio/ftell.c +++ /dev/null @@ -1,139 +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. - * 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) -static char sccsid[] = "@(#)ftell.c 8.2 (Berkeley) 5/4/95"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <sys/types.h> -#include <errno.h> -#include <limits.h> -#include <stdio.h> -#include "un-namespace.h" -#include "local.h" -#include "libc_private.h" - -/* - * standard ftell function. - */ -long -ftell(fp) - FILE *fp; -{ - off_t rv; - - rv = ftello(fp); - if (rv > LONG_MAX) { - errno = EOVERFLOW; - return (-1); - } - return (rv); -} - -/* - * ftello: return current offset. - */ -off_t -ftello(fp) - FILE *fp; -{ - fpos_t rv; - int ret; - - FLOCKFILE(fp); - ret = _ftello(fp, &rv); - FUNLOCKFILE(fp); - if (ret) - return (-1); - if (rv < 0) { /* Unspecified value because of ungetc() at 0 */ - errno = ESPIPE; - return (-1); - } - return (rv); -} - -int -_ftello(fp, offset) - FILE *fp; - fpos_t *offset; -{ - fpos_t pos; - size_t n; - - if (fp->_seek == NULL) { - errno = ESPIPE; /* historic practice */ - return (1); - } - - /* - * Find offset of underlying I/O object, then - * adjust for buffered bytes. - */ - if (fp->_flags & __SOFF) - pos = fp->_offset; - else { - pos = _sseek(fp, (fpos_t)0, SEEK_CUR); - if (pos == -1) - return (1); - } - if (fp->_flags & __SRD) { - /* - * Reading. Any unread characters (including - * those from ungetc) cause the position to be - * smaller than that in the underlying object. - */ - if ((pos -= (HASUB(fp) ? fp->_ur : fp->_r)) < 0) { - fp->_flags |= __SERR; - errno = EIO; - return (1); - } - if (HASUB(fp)) - pos -= fp->_r; /* Can be negative at this point. */ - } else if ((fp->_flags & __SWR) && fp->_p != NULL) { - /* - * Writing. Any buffered characters cause the - * position to be greater than that in the - * underlying object. - */ - n = fp->_p - fp->_bf._base; - if (pos > OFF_MAX - n) { - errno = EOVERFLOW; - return (1); - } - pos += n; - } - *offset = pos; - return (0); -} |
