diff options
Diffstat (limited to 'lib/libc/stdio/fread.c')
-rw-r--r-- | lib/libc/stdio/fread.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/lib/libc/stdio/fread.c b/lib/libc/stdio/fread.c deleted file mode 100644 index ad3ea29..0000000 --- a/lib/libc/stdio/fread.c +++ /dev/null @@ -1,115 +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[] = "@(#)fread.c 8.2 (Berkeley) 12/11/93"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <errno.h> -#include <stdint.h> -#include <stdio.h> -#include <string.h> -#include "un-namespace.h" -#include "local.h" -#include "libc_private.h" - -/* - * MT-safe version - */ - -size_t -fread(void * __restrict buf, size_t size, size_t count, FILE * __restrict fp) -{ - size_t ret; - - FLOCKFILE(fp); - ret = __fread(buf, size, count, fp); - FUNLOCKFILE(fp); - return (ret); -} - -size_t -__fread(void * __restrict buf, size_t size, size_t count, FILE * __restrict fp) -{ - size_t resid; - char *p; - int r; - size_t total; - - /* - * ANSI and SUSv2 require a return value of 0 if size or count are 0. - */ - if ((count == 0) || (size == 0)) - return (0); - - /* - * Check for integer overflow. As an optimization, first check that - * at least one of {count, size} is at least 2^16, since if both - * values are less than that, their product can't possible overflow - * (size_t is always at least 32 bits on FreeBSD). - */ - if (((count | size) > 0xFFFF) && - (count > SIZE_MAX / size)) { - errno = EINVAL; - fp->_flags |= __SERR; - return (0); - } - - /* - * Compute the (now required to not overflow) number of bytes to - * read and actually do the work. - */ - resid = count * size; - ORIENT(fp, -1); - if (fp->_r < 0) - fp->_r = 0; - total = resid; - p = buf; - while (resid > (r = fp->_r)) { - (void)memcpy((void *)p, (void *)fp->_p, (size_t)r); - fp->_p += r; - /* fp->_r = 0 ... done in __srefill */ - p += r; - resid -= r; - if (__srefill(fp)) { - /* no more input: return partial result */ - return ((total - resid) / size); - } - } - (void)memcpy((void *)p, (void *)fp->_p, resid); - fp->_r -= resid; - fp->_p += resid; - return (count); -} |