X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrncat.c;h=f05a9ec7239cf19cf53c14c5ef1a78e0c5d028b3;hb=40491b595bb70b20781cc10e235ebf6f1f7b2455;hp=b33fb7cf39b1f2665816bcbe36929c458aa12405;hpb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;p=pdclib

diff --git a/functions/string/strncat.c b/functions/string/strncat.c
index b33fb7c..f05a9ec 100644
--- a/functions/string/strncat.c
+++ b/functions/string/strncat.c
@@ -10,6 +10,8 @@
 
 #include <string.h>
 
+#ifndef REGTEST
+
 char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
 {
     char * rc = s1;
@@ -28,4 +30,34 @@ 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()
+{
+    char s[] = "xx\0xxxxxx";
+    BEGIN_TESTS;
+    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