X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrcmp.c;h=483260cf3974d4c366fa270040a5afdcb5f08625;hb=d6f1494a4f38a212b29a13ee713885058dcf0fe7;hp=6dbb142df93beb3cf63da79c164a03325ead7d4b;hpb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;p=pdclib

diff --git a/functions/string/strcmp.c b/functions/string/strcmp.c
index 6dbb142..483260c 100644
--- a/functions/string/strcmp.c
+++ b/functions/string/strcmp.c
@@ -1,13 +1,13 @@
-/* $Id$ */
-
-/* Release $Name$ */
-
 /* 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 ( ( *s1 ) && ( *s1 == *s2 ) )
@@ -15,7 +15,25 @@ int strcmp( const char * s1, const char * s2 )
         ++s1;
         ++s2;
     }
-    return ( *s1 - *s2 );
+    return ( *(unsigned char *)s1 - *(unsigned char *)s2 );
 }
 
-#warning Test driver missing.
+#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