| Antonio Nino Diaz | 7a7d63f | 2018-08-13 19:39:40 +0100 | [diff] [blame^] | 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-3-Clause |
| 3 | * |
| 4 | * Copyright (c) 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #if defined(LIBC_SCCS) && !defined(lint) |
| 33 | static char sccsid[] = "@(#)strncmp.c 8.1 (Berkeley) 6/4/93"; |
| 34 | #endif /* LIBC_SCCS and not lint */ |
| 35 | #include <sys/cdefs.h> |
| 36 | __FBSDID("$FreeBSD$"); |
| 37 | |
| 38 | #include <string.h> |
| 39 | |
| 40 | int |
| 41 | strncmp(const char *s1, const char *s2, size_t n) |
| 42 | { |
| 43 | |
| 44 | if (n == 0) |
| 45 | return (0); |
| 46 | do { |
| 47 | if (*s1 != *s2++) |
| 48 | return (*(const unsigned char *)s1 - |
| 49 | *(const unsigned char *)(s2 - 1)); |
| 50 | if (*s1++ == '\0') |
| 51 | break; |
| 52 | } while (--n != 0); |
| 53 | return (0); |
| 54 | } |