X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrcmp.c;h=5202771a67d52f266000746cf63c7608cd9b7682;hb=393020b6e48719d27699dea6b29e53025bbd5123;hp=f6a555b56de7d0076c425a472466e393bec43685;hpb=ba5eff8dd9b426485e1559b5d6204692d155d9e8;p=pdclib

diff --git a/functions/string/strcmp.c b/functions/string/strcmp.c
index f6a555b..5202771 100644
--- a/functions/string/strcmp.c
+++ b/functions/string/strcmp.c
@@ -1,13 +1,15 @@
 /* $Id$ */
 
-/* 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 ) )
@@ -15,14 +17,25 @@ 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
-int main()
+#include <_PDCLIB_test.h>
+
+int main( void )
 {
-    return 0;
+    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