X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrncpy.c;h=31602ec8a9fef4709ce87b2904c821fb6256d2f4;hb=1a0d9f7faca36f149db3b85c09a72528e0c73a83;hp=ed5965d148ddbd5236288cbc521d39423911db0c;hpb=02c1ddcae6c88b55d2f4de825ee6c6456150b8ae;p=pdclib

diff --git a/functions/string/strncpy.c b/functions/string/strncpy.c
index ed5965d..31602ec 100644
--- a/functions/string/strncpy.c
+++ b/functions/string/strncpy.c
@@ -17,15 +17,34 @@ char * strncpy( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, si
     while ( ( n > 0 ) && ( *s1++ = *s2++ ) )
     {
         /* Cannot do "n--" in the conditional as size_t is unsigned and we have
-           to check it again for >0 in the next loop.
+        to check it again for >0 in the next loop.
         */
         --n;
     }
-    while ( n-- )
+    while ( --n )
     {
         *s1++ = '\0';
     }
     return rc;
 }
 
-#warning Test driver missing.
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main()
+{
+    char s[] = "xxxxxxx";
+    BEGIN_TESTS;
+    TESTCASE( strncpy( s, "", 1 ) == s );
+    TESTCASE( s[0] == '\0' );
+    TESTCASE( s[1] == 'x' );
+    TESTCASE( strncpy( s, abcde, 6 ) == s );
+    TESTCASE( s[0] == 'a' );
+    TESTCASE( s[4] == 'e' );
+    TESTCASE( s[5] == '\0' );
+    TESTCASE( s[6] == 'x' );
+    TESTCASE( strncpy( s, abcde, 7 ) == s );
+    TESTCASE( s[6] == '\0' );
+    return TEST_RESULTS;
+}
+#endif