diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/strsep.c | 62 | ||||
| -rw-r--r-- | lib/strtok.c | 73 |
2 files changed, 62 insertions, 73 deletions
diff --git a/lib/strsep.c b/lib/strsep.c new file mode 100644 index 0000000..a118b1b --- /dev/null +++ b/lib/strsep.c @@ -0,0 +1,62 @@ +/* Copyright (C) 1992, 1993, 1996, 1997, 1998, 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <string.h> + +char * +strsep (char **stringp, const char *delim) +{ + char *begin, *end; + + begin = *stringp; + if (begin == NULL) + return NULL; + + /* A frequent case is when the delimiter string contains only one + character. Here we don't need to call the expensive `strpbrk' + function and instead work using `strchr'. */ + if (delim[0] == '\0' || delim[1] == '\0') + { + char ch = delim[0]; + + if (ch == '\0') + end = NULL; + else + { + if (*begin == ch) + end = begin; + else + end = strchr (begin + 1, ch); + } + } + else + /* Find the end of the token. */ + end = strpbrk (begin, delim); + + if (end) + { + /* Terminate the token and set *STRINGP past NUL character. */ + *end++ = '\0'; + *stringp = end; + } + else + /* No more delimiters; this is the last token. */ + *stringp = NULL; + + return begin; +} diff --git a/lib/strtok.c b/lib/strtok.c deleted file mode 100644 index 0b95084..0000000 --- a/lib/strtok.c +++ /dev/null @@ -1,73 +0,0 @@ -/* Copyright (C) 1991 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 Library General Public License as -published by the Free Software Foundation; either version 2 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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <ansidecl.h> -#include <errno.h> -#include <string.h> - - -static char *olds = NULL; - -/* Parse S into tokens separated by characters in DELIM. - If S is NULL, the last string strtok() was called with is - used. For example: - char s[] = "-abc=-def"; - x = strtok(s, "-"); // x = "abc" - x = strtok(NULL, "=-"); // x = "def" - x = strtok(NULL, "="); // x = NULL - // s = "abc\0-def\0" -*/ -char * -DEFUN(strtok, (s, delim), - register char *s AND register CONST char *delim) -{ - char *token; - - if (s == NULL) - { - if (olds == NULL) - { - errno = EINVAL; - return NULL; - } - else - s = olds; - } - - /* Scan leading delimiters. */ - s += strspn(s, delim); - if (*s == '\0') - { - olds = NULL; - return NULL; - } - - /* Find the end of the token. */ - token = s; - s = strpbrk(token, delim); - if (s == NULL) - /* This token finishes the string. */ - olds = NULL; - else - { - /* Terminate the token and make OLDS point past it. */ - *s = '\0'; - olds = s + 1; - } - return token; -} |