Move string.h functions in lib/ to lib/string

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3439 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 74 insertions, 0 deletions

diff --git a/nuttx/lib/string/lib_memcmp.c b/nuttx/lib/string/lib_memcmp.c
new file mode 100644
index 000000000..cd874a85e
--- /dev/null
+++ b/nuttx/lib/string/lib_memcmp.c
@@ -0,0 +1,74 @@
+/************************************************************
+ * lib/string/lib_memcmp.c
+ *
+ *   Copyright (C) 2007, 2011 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.
+ *
+ ************************************************************/
+
+/************************************************************
+ * Compilation Switches
+ ************************************************************/
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <string.h>
+
+/************************************************************
+ * Global Functions
+ ************************************************************/
+
+#ifndef CONFIG_ARCH_MEMCMP
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+  unsigned char *p1 = (unsigned char *)s1;
+  unsigned char *p2 = (unsigned char *)s2;
+
+  while (n-- > 0)
+    {
+      if (*p1 < *p2)
+        {
+          return -1;
+        }
+      else if (*p1 > *p2)
+        {
+          return 1;
+        }
+
+      p1++;
+      p2++;
+    }
+  return 0;
+}
+#endif