Whitespace cleanups.

[pdclib] / functions / string / strcmp.c

diff --git a/functions/string/strcmp.c b/functions/string/strcmp.c
index e72e3761bf78a260f77e4037f8a81580c0e2abe8..639fc10259c24a6bd3eec3d24b59ec0e4420c203 100644 (file)
--- a/functions/string/strcmp.c
+++ b/functions/string/strcmp.c
@@ -1,16 +1,41 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int strcmp( const char * src_1, const char * src_2 )
+/* strcmp( const char *, const char * )
+
+   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>
+
+#ifndef REGTEST
+
+int strcmp( const char * s1, const char * s2 )
 {
-    while ( ( *src_1 != '\0' ) && ( *src_1 == *src_2 ) )
+    while ( ( *s1 ) && ( *s1 == *s2 ) )
     {
-        ++src_1;
-        ++src_2;
+        ++s1;
+        ++s2;
     }
-    return ( *src_1 - *src_2 );
+    return ( *(unsigned char *)s1 - *(unsigned char *)s2 );
 }
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char cmpabcde[] = "abcde";
+    char cmpabcd_[] = "abcd\xfc";
+    char empty[] = "";
+    TESTCASE( strcmp( abcde, cmpabcde ) == 0 );
+    TESTCASE( strcmp( abcde, abcdx ) < 0 );
+    TESTCASE( strcmp( abcdx, abcde ) > 0 );
+    TESTCASE( strcmp( empty, abcde ) < 0 );
+    TESTCASE( strcmp( abcde, empty ) > 0 );
+    TESTCASE( strcmp( abcde, cmpabcd_ ) < 0 );
+    return TEST_RESULTS;
+}
+
+#endif