Added dummy test drivers to each *.c file, and target 'test' to Makefile.

[pdclib] / functions / string / strncmp.c

diff --git a/functions/string/strncmp.c b/functions/string/strncmp.c
index d0434a54f3b53f38747b51fbd7c461899883de14..7f398fa9b2b9be4bce4763afabf4bf737e4bf2d2 100644 (file)
--- a/functions/string/strncmp.c
+++ b/functions/string/strncmp.c
@@ -1,8 +1,38 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int strncmp( const char * s1, const char * s2, size_t n ) { /* TODO */ };
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* strncmp( const char *, const char *, size_t )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+int strncmp( const char * s1, const char * s2, size_t n )
+{
+    while ( n && ( *s1 == *s2 ) )
+    {
+        ++s1;
+        ++s2;
+        --n;
+    }
+    if ( ( n == 0 ) )
+    {
+        return 0;
+    }
+    else
+    {
+        return ( *s1 - *s2 );
+    }
+}
+
+#warning Test driver missing.
+
+#ifdef TEST
+int main()
+{
+    return 0;
+}
+#endif