projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f15e832d KB |
1 | /* |
| 2 | * Copyright (c) 1988 Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 019bea33 | 5 | * %sccs.include.redist.c% |
| 4afb9d15 | 6 | * |
| f15e832d KB |
7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Computer Consoles Inc. | |
| f15e832d KB |
9 | */ |
| 10 | ||
| 11 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 019bea33 | 12 | .asciz "@(#)strncmp.s 1.4 (Berkeley) %G%" |
| f15e832d | 13 | #endif /* LIBC_SCCS and not lint */ |
| 895b7a2b SL |
14 | |
| 15 | /* | |
| 16 | * Compare strings (at most n bytes): s1>s2: >0 s1==s2: 0 s1<s2: <0 | |
| 17 | * | |
| 18 | * strncmp(s1, s2, n) | |
| 19 | * register char *s1, *s2; | |
| 20 | * register n; | |
| 21 | */ | |
| 22 | #include "DEFS.h" | |
| 23 | ||
| 24 | ENTRY(strncmp, 0) | |
| 25 | movl 12(fp),r2 | |
| 26 | tstl r2 /* number of bytes to compare */ | |
| 27 | jgtr n_ok | |
| 28 | clrl r0 | |
| 29 | ret /* for n <= 0 , s1 == s2 */ | |
| 30 | n_ok: | |
| 31 | movl 4(fp),r0 | |
| 32 | movl 8(fp),r1 | |
| 33 | cmps3 | |
| 34 | jgtr greater | |
| 35 | jlss less | |
| 36 | equal: clrl r0 | |
| 37 | ret | |
| 38 | less: movl $-1,r0 | |
| 39 | ret | |
| 40 | greater: movl $1,r0 | |
| 41 | ret |