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-rw-r--r--sysdeps/generic/strtok.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/sysdeps/generic/strtok.c b/sysdeps/generic/strtok.c
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+/* Copyright (C) 1991, 1996 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 <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 *
+strtok (s, delim)
+ char *s;
+ 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;
+}