1 files changed, 86 insertions, 0 deletions

diff --git a/src/lib/libc/string/strtok.c b/src/lib/libc/string/strtok.c
new file mode 100644
index 0000000000..4e963a019e
--- /dev/null
+++ b/src/lib/libc/string/strtok.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 1988 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <string.h>
+
+char *
+strtok(char *s, const char *delim)
+{
+        static char *last;
+
+        return strtok_r(s, delim, &last);
+}
+
+char *
+strtok_r(char *s, const char *delim, char **last)
+{
+        char *spanp;
+        int c, sc;
+        char *tok;
+
+
+        if (s == NULL && (s = *last) == NULL)
+                return (NULL);
+
+        /*
+         * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
+         */
+cont:
+        c = *s++;
+        for (spanp = (char *)delim; (sc = *spanp++) != 0;) {
+                if (c == sc)
+                        goto cont;
+        }
+
+        if (c == 0) {           /* no non-delimiter characters */
+                *last = NULL;
+                return (NULL);
+        }
+        tok = s - 1;
+
+        /*
+         * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
+         * Note that delim must have one NUL; we stop if we see that, too.
+         */
+        for (;;) {
+                c = *s++;
+                spanp = (char *)delim;
+                do {
+                        if ((sc = *spanp++) == c) {
+                                if (c == 0)
+                                        s = NULL;
+                                else
+                                        s[-1] = 0;
+                                *last = s;
+                                return (tok);
+                        }
+                } while (sc != 0);
+        }
+        /* NOTREACHED */
+}