From 96a45c67960e9bac5562508fe8fd63738e7943c8 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Wed, 27 Oct 2010 20:54:11 +0000
Subject: Add strnlen()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3054 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/lib/Makefile      |  9 +++----
 nuttx/lib/lib_strnlen.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+), 4 deletions(-)
 create mode 100644 nuttx/lib/lib_strnlen.c

(limited to 'nuttx/lib')

diff --git a/nuttx/lib/Makefile b/nuttx/lib/Makefile
index a08e72156..a3a0c6181 100644
--- a/nuttx/lib/Makefile
+++ b/nuttx/lib/Makefile
@@ -46,10 +46,11 @@ endif
 STRING_SRCS	= lib_checkbase.c lib_isbasedigit.c lib_memset.c lib_memcpy.c \
 		  lib_memcmp.c lib_memmove.c lib_skipspace.c lib_strcasecmp.c  \
 		  lib_strcat.c lib_strchr.c lib_strcpy.c lib_strcmp.c lib_strcspn.c \
-		  lib_strdup.c lib_strerror.c lib_strlen.c lib_strncasecmp.c \
-		  lib_strncat.c lib_strncmp.c lib_strncpy.c lib_strpbrk.c \
-		  lib_strrchr.c  lib_strspn.c lib_strstr.c lib_strtok.c lib_strtokr.c \
-		  lib_strtol.c lib_strtoll.c lib_strtoul.c lib_strtoull.c lib_strtod.c
+		  lib_strdup.c lib_strerror.c lib_strlen.c lib_strnlen.c \
+		  lib_strncasecmp.c lib_strncat.c lib_strncmp.c lib_strncpy.c \
+		  lib_strpbrk.c lib_strrchr.c  lib_strspn.c lib_strstr.c lib_strtok.c \
+		  lib_strtokr.c lib_strtol.c lib_strtoll.c lib_strtoul.c \
+		  lib_strtoull.c lib_strtod.c
 
 CTYPE_SRCS	= 
 
diff --git a/nuttx/lib/lib_strnlen.c b/nuttx/lib/lib_strnlen.c
new file mode 100644
index 000000000..f6624a64f
--- /dev/null
+++ b/nuttx/lib/lib_strnlen.c
@@ -0,0 +1,62 @@
+/****************************************************************************
+ * lib/lib_strnlen.c
+ *
+ * This file is part of NuttX, contributed by Michael Hrabanek
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Michael Hrabanek
+ *
+ * Derives from the file lib/lib_strlen.c:
+ *
+ *   Copyright (C) 2007, 2008, 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <string.h>
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+#ifndef CONFIG_ARCH_STRNLEN
+size_t strnlen(const char *s, size_t maxlen)
+{
+  const char *sc;
+  for (sc = s; maxlen != 0 && *sc != '\0'; maxlen--, ++sc);
+  return sc - s;
+}
+#endif
-- 
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