diff options
Diffstat (limited to 'usr.bin/cksum/sum1.c')
| -rw-r--r-- | usr.bin/cksum/sum1.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/usr.bin/cksum/sum1.c b/usr.bin/cksum/sum1.c deleted file mode 100644 index 19eeebe..0000000 --- a/usr.bin/cksum/sum1.c +++ /dev/null @@ -1,69 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)sum1.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/types.h> -#include <unistd.h> - -int -csum1(fd, cval, clen) - register int fd; - u_long *cval, *clen; -{ - register u_long total; - register int nr; - register u_int crc; - register u_char *p; - u_char buf[8192]; - - /* - * 16-bit checksum, rotating right before each addition; - * overflow is discarded. - */ - crc = total = 0; - while ((nr = read(fd, buf, sizeof(buf))) > 0) - for (total += nr, p = buf; nr--; ++p) { - if (crc & 1) - crc |= 0x10000; - crc = ((crc >> 1) + *p) & 0xffff; - } - if (nr < 0) - return(1); - - *cval = crc; - *clen = total; - return(0); -} |
