projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cd6c9416 | 1 | /*- |
| 37032729 KB |
2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| cd6c9416 | 4 | * |
| c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| cd6c9416 KB |
32 | */ |
| 33 | ||
| 34 | #if defined(LIBC_SCCS) && !defined(lint) | |
| ad787160 | 35 | .asciz "@(#)strsep.s 8.1 (Berkeley) 6/4/93" |
| cd6c9416 KB |
36 | #endif /* LIBC_SCCS and not lint */ |
| 37 | ||
| 38 | /* | |
| 39 | * Get next word from string *stringp, where words are | |
| 40 | * strings separated by characters from delim. | |
| 41 | * | |
| 42 | * Writes NULs into the string at *stringp to end tokens. | |
| 43 | * On return, *stringp points past the last NUL written (if there might | |
| 44 | * be further tokens), or is NULL (if there are definitely no more tokens). | |
| 45 | * | |
| 46 | * If *stringp is NULL, strtoken returns NULL. | |
| 47 | * | |
| 48 | * char * | |
| 49 | * strtoken(stringp, delim) | |
| 50 | * register char **stringp; | |
| 51 | * register char const *delim; | |
| 52 | */ | |
| 53 | #include "DEFS.h" | |
| 54 | ||
| 55 | ENTRY(strsep, 0) | |
| 56 | tstl *4(ap) /* if (*stringp == NULL) */ | |
| 57 | bneq 0f | |
| 58 | clrl r0 # return (NULL); | |
| 59 | ret | |
| 60 | ||
| 61 | 0: | |
| 62 | subl2 $32,sp /* make room for 256 bit table */ | |
| 63 | movc5 $0,(sp),$0,$32,(sp) | |
| 64 | movq 4(ap),r1 /* r1 = stringp, r2 = delim */ | |
| 65 | ||
| 66 | /* turn on bit for each character in s2, including '\0' */ | |
| 67 | 1: | |
| 68 | movzbl (r2)+,r0 | |
| 69 | bbss r0,(sp),1b | |
| 70 | bneq 1b | |
| 71 | ||
| 72 | movl (r1),r3 /* r3 = s = *stringp */ | |
| 73 | movl r3,r0 /* save return value */ | |
| 74 | ||
| 75 | /* scan for delimiters */ | |
| 76 | 2: | |
| 77 | movzbl (r3)+,r2 /* c = *s++ */ | |
| 78 | bbc r2,(sp),2b /* loop until c is in table */ | |
| 79 | beql 3f | |
| 80 | clrb -1(r3) /* if c!='\0', s[-1] = 0 */ | |
| 81 | movl r3,(r1) /* and *stringp = s */ | |
| 82 | ret | |
| 83 | 3: | |
| 84 | clrl (r1) /* else *stringp = NULL */ | |
| 85 | ret |