New module 'mbstok_r'.

[gnulib.git] / lib / mbstok_r.c

diff --git a/lib/mbstok_r.c b/lib/mbstok_r.c
new file mode 100644 (file)
index 0000000..fb6bdef
--- /dev/null
+++ b/lib/mbstok_r.c
@@ -0,0 +1,71 @@
+/* Tokenizing a string.
+   Copyright (C) 1999, 2002, 2006-2007 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#if HAVE_MBRTOWC
+# include "mbuiter.h"
+#endif
+
+char *
+mbstok_r (char *string, const char *delim, char **save_ptr)
+{
+#if HAVE_MBRTOWC
+  if (MB_CUR_MAX > 1)
+    {
+      if (string == NULL)
+       {
+         string = *save_ptr;
+         if (string == NULL)
+           return NULL; /* reminder that end of token sequence has been
+                           reached */
+       }
+
+      /* Skip leading delimiters.  */
+      string += mbsspn (string, delim);
+
+      /* Found a token?  */
+      if (*string == '\0')
+       {
+         *save_ptr = NULL;
+         return NULL;
+       }
+
+      /* Move past the token.  */
+      {
+       char *token_end = mbspbrk (string, delim);
+
+       if (token_end != NULL)
+         {
+           /* NUL-terminate the token.  */
+           *token_end = '\0';
+           *save_ptr = token_end + 1;
+         }
+       else
+         *save_ptr = NULL;
+      }
+
+      return string;
+    }
+  else
+#endif
+    return strtok_r (string, delim, save_ptr);
+}