| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Reentrant string tokenizer. Generic version. |
| 2 | Copyright (C) 1991,1996-1999,2001,2004 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #include <string.h> |
| 21 | |
| 22 | #ifdef __USE_GNU |
| 23 | # define __rawmemchr rawmemchr |
| 24 | #else |
| 25 | # define __rawmemchr strchr |
| 26 | #endif |
| 27 | #if 0 |
| 28 | Parse S into tokens separated by characters in DELIM. |
| 29 | If S is NULL, the saved pointer in SAVE_PTR is used as |
| 30 | the next starting point. For example: |
| 31 | char s[] = "-abc-=-def"; |
| 32 | char *sp; |
| 33 | x = strtok_r(s, "-", &sp); /* x = "abc", sp = "=-def" */ |
| 34 | x = strtok_r(NULL, "-=", &sp); /* x = "def", sp = NULL */ |
| 35 | x = strtok_r(NULL, "=", &sp); /* x = NULL */ |
| 36 | /* s = "abc\0-def\0" */ |
| 37 | #endif |
| 38 | char *strtok_r (char *s, const char *delim, char **save_ptr) |
| 39 | { |
| 40 | char *token; |
| 41 | |
| 42 | if (s == NULL) |
| 43 | s = *save_ptr; |
| 44 | |
| 45 | /* Scan leading delimiters. */ |
| 46 | s += strspn (s, delim); |
| 47 | if (*s == '\0') |
| 48 | { |
| 49 | *save_ptr = s; |
| 50 | return NULL; |
| 51 | } |
| 52 | |
| 53 | /* Find the end of the token. */ |
| 54 | token = s; |
| 55 | s = strpbrk (token, delim); |
| 56 | if (s == NULL) |
| 57 | /* This token finishes the string. */ |
| 58 | *save_ptr = __rawmemchr (token, '\0'); |
| 59 | else |
| 60 | { |
| 61 | /* Terminate the token and make *SAVE_PTR point past it. */ |
| 62 | *s = '\0'; |
| 63 | *save_ptr = s + 1; |
| 64 | } |
| 65 | return token; |
| 66 | } |
| 67 | libc_hidden_def(strtok_r) |