lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <string.h> |
| 19 | |
| 20 | |
| 21 | static char *olds; |
| 22 | |
| 23 | #undef strtok |
| 24 | |
| 25 | #ifndef STRTOK |
| 26 | # define STRTOK strtok |
| 27 | #endif |
| 28 | |
| 29 | /* Parse S into tokens separated by characters in DELIM. |
| 30 | If S is NULL, the last string strtok() was called with is |
| 31 | used. For example: |
| 32 | char s[] = "-abc-=-def"; |
| 33 | x = strtok(s, "-"); // x = "abc" |
| 34 | x = strtok(NULL, "-="); // x = "def" |
| 35 | x = strtok(NULL, "="); // x = NULL |
| 36 | // s = "abc\0=-def\0" |
| 37 | */ |
| 38 | char * |
| 39 | STRTOK (char *s, const char *delim) |
| 40 | { |
| 41 | char *token; |
| 42 | |
| 43 | if (s == NULL) |
| 44 | s = olds; |
| 45 | |
| 46 | /* Scan leading delimiters. */ |
| 47 | s += strspn (s, delim); |
| 48 | if (*s == '\0') |
| 49 | { |
| 50 | olds = s; |
| 51 | return NULL; |
| 52 | } |
| 53 | |
| 54 | /* Find the end of the token. */ |
| 55 | token = s; |
| 56 | s = strpbrk (token, delim); |
| 57 | if (s == NULL) |
| 58 | /* This token finishes the string. */ |
| 59 | olds = __rawmemchr (token, '\0'); |
| 60 | else |
| 61 | { |
| 62 | /* Terminate the token and make OLDS point past it. */ |
| 63 | *s = '\0'; |
| 64 | olds = s + 1; |
| 65 | } |
| 66 | return token; |
| 67 | } |