strtok_r() freshly implemented by yours truly

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@486 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 67 insertions, 0 deletions

diff --git a/firmware/common/strtok.c b/firmware/common/strtok.c
new file mode 100644
index 0000000..1028774
--- /dev/null
+++ b/firmware/common/strtok.c
@@ -0,0 +1,67 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Daniel Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied. *
+ ****************************************************************************/
+
+#include "config.h"
+
+#ifndef HAVE_STRTOK_R
+#include <stddef.h>
+#include <string.h>
+
+char *
+strtok_r(char *ptr, const char *sep, char **end)
+{
+    if (!ptr)
+        /* we got NULL input so then we get our last position instead */
+        ptr = *end;
+
+    /* pass all letters that are including in the separator string */
+    while (*ptr && strchr(sep, *ptr))
+        ++ptr;
+
+    if (*ptr) {
+        /* so this is where the next piece of string starts */
+        char *start = ptr;
+
+        /* set the end pointer to the first byte after the start */
+        *end = start + 1;
+
+        /* scan through the string to find where it ends, it ends on a
+           null byte or a character that exists in the separator string */
+        while (**end && !strchr(sep, **end))
+            ++*end;
+
+        if (**end) {
+            /* the end is not a null byte */
+            **end = '\0';  /* zero terminate it! */
+            ++*end;        /* advance last pointer to beyond the null byte */
+        }
+
+        return start; /* return the position where the string starts */
+    }
+
+    /* we ended up on a null byte, there are no more strings to find! */
+    return NULL;
+}
+
+#endif /* this was only compiled if strtok_r wasn't present */
+
+/*
+ * local variables:
+ * eval: (load-file "../rockbox-mode.el")
+ * end:
+ */