Libc-320.tar.gz

[apple/libc.git] / string / FreeBSD / wcstok.c

diff --git a/string/FreeBSD/wcstok.c b/string/FreeBSD/wcstok.c
new file mode 100644 (file)
index 0000000..5781adb
--- /dev/null
+++ b/string/FreeBSD/wcstok.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 1998 Softweyr LLC.  All rights reserved.
+ *
+ * strtok_r, from Berkeley strtok
+ * Oct 13, 1998 by Wes Peters <wes@softweyr.com>
+ *
+ * Copyright (c) 1988, 1993
+ *     The 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
+ *    notices, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notices, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by Softweyr LLC, the
+ *      University of California, Berkeley, and its contributors.
+ * 4. 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 SOFTWEYR LLC, 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 SOFTWEYR LLC, 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/string/wcstok.c,v 1.2 2003/03/12 06:41:49 tjr Exp $");
+
+#include <wchar.h>
+
+wchar_t *
+wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim,
+    wchar_t ** __restrict last)
+{
+       const wchar_t *spanp;
+       wchar_t *tok;
+       wchar_t c, sc;
+
+       if (s == NULL && (s = *last) == NULL)
+               return (NULL);
+
+       /*
+        * Skip (span) leading delimiters (s += wcsspn(s, delim), sort of).
+        */
+cont:
+       c = *s++;
+       for (spanp = delim; (sc = *spanp++) != L'\0';) {
+               if (c == sc)
+                       goto cont;
+       }
+
+       if (c == L'\0') {       /* no non-delimiter characters */
+               *last = NULL;
+               return (NULL);
+       }
+       tok = s - 1;
+
+       /*
+        * Scan token (scan for delimiters: s += wcscspn(s, delim), sort of).
+        * Note that delim must have one NUL; we stop if we see that, too.
+        */
+       for (;;) {
+               c = *s++;
+               spanp = delim;
+               do {
+                       if ((sc = *spanp++) == c) {
+                               if (c == L'\0')
+                                       s = NULL;
+                               else
+                                       s[-1] = L'\0';
+                               *last = s;
+                               return (tok);
+                       }
+               } while (sc != L'\0');
+       }
+       /* NOTREACHED */
+}