projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 39236c6e A |
1 | /*- |
| 2 | * Copyright (c) 1990, 1993 | |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Chris Torek. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 4. Neither the name of the University nor the names of its contributors | |
| 17 | * may be used to endorse or promote products derived from this software | |
| 18 | * without specific prior written permission. | |
| 19 | * | |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | */ | |
| 32 | ||
| 33 | #include "string.h" | |
| 34 | ||
| 35 | /* | |
| 36 | * Compare strings. | |
| 37 | */ | |
| 38 | __attribute__((visibility("hidden"))) | |
| 39 | int | |
| d9a64523 | 40 | _libkernel_strcmp(const char *s1, const char *s2) |
| 39236c6e | 41 | { |
| 0a7de745 A |
42 | while (*s1 == *s2++) { |
| 43 | if (*s1++ == '\0') { | |
| 44 | return 0; | |
| 45 | } | |
| 46 | } | |
| 47 | return *(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1); | |
| 39236c6e | 48 | } |