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Diffstat (limited to 'REORG.TODO/string/strtok_r.c')
-rw-r--r-- | REORG.TODO/string/strtok_r.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/REORG.TODO/string/strtok_r.c b/REORG.TODO/string/strtok_r.c new file mode 100644 index 0000000000..ace3520a25 --- /dev/null +++ b/REORG.TODO/string/strtok_r.c @@ -0,0 +1,79 @@ +/* Reentrant string tokenizer. Generic version. + Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <string.h> + +#ifndef _LIBC +/* Get specification. */ +# include "strtok_r.h" +# define __strtok_r strtok_r +#endif + +/* Parse S into tokens separated by characters in DELIM. + If S is NULL, the saved pointer in SAVE_PTR is used as + the next starting point. For example: + char s[] = "-abc-=-def"; + char *sp; + x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def" + x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL + x = strtok_r(NULL, "=", &sp); // x = NULL + // s = "abc\0-def\0" +*/ +char * +__strtok_r (char *s, const char *delim, char **save_ptr) +{ + char *end; + + if (s == NULL) + s = *save_ptr; + + if (*s == '\0') + { + *save_ptr = s; + return NULL; + } + + /* Scan leading delimiters. */ + s += strspn (s, delim); + if (*s == '\0') + { + *save_ptr = s; + return NULL; + } + + /* Find the end of the token. */ + end = s + strcspn (s, delim); + if (*end == '\0') + { + *save_ptr = end; + return s; + } + + /* Terminate the token and make *SAVE_PTR point past it. */ + *end = '\0'; + *save_ptr = end + 1; + return s; +} +#ifdef weak_alias +libc_hidden_def (__strtok_r) +weak_alias (__strtok_r, strtok_r) +#endif |