X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstring%2Fstrncat.c;h=18d8ed596e9fc0cd20b872f90f99200d2a68b6bb;hp=b33fb7cf39b1f2665816bcbe36929c458aa12405;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=c0169638bd02098717cb23fbbca3bcc4e4caccf0

diff --git a/functions/string/strncat.c b/functions/string/strncat.c
index b33fb7c..18d8ed5 100644
--- a/functions/string/strncat.c
+++ b/functions/string/strncat.c
@@ -1,7 +1,3 @@
-/* $Id$ */
-
-/* Release $Name$ */
-
 /* strncat( char *, const char *, size_t )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -10,6 +6,8 @@
 
 #include <string.h>
 
+#ifndef REGTEST
+
 char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
 {
     char * rc = s1;
@@ -28,4 +26,33 @@ char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, si
     return rc;
 }
 
-#warning Test driver missing.
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char s[] = "xx\0xxxxxx";
+    TESTCASE( strncat( s, abcde, 10 ) == s );
+    TESTCASE( s[2] == 'a' );
+    TESTCASE( s[6] == 'e' );
+    TESTCASE( s[7] == '\0' );
+    TESTCASE( s[8] == 'x' );
+    s[0] = '\0';
+    TESTCASE( strncat( s, abcdx, 10 ) == s );
+    TESTCASE( s[4] == 'x' );
+    TESTCASE( s[5] == '\0' );
+    TESTCASE( strncat( s, "\0", 10 ) == s );
+    TESTCASE( s[5] == '\0' );
+    TESTCASE( s[6] == 'e' );
+    TESTCASE( strncat( s, abcde, 0 ) == s );
+    TESTCASE( s[5] == '\0' );
+    TESTCASE( s[6] == 'e' );
+    TESTCASE( strncat( s, abcde, 3 ) == s );
+    TESTCASE( s[5] == 'a' );
+    TESTCASE( s[7] == 'c' );
+    TESTCASE( s[8] == '\0' );
+    return TEST_RESULTS;
+}
+#endif