Added dummy test drivers to each *.c file, and target 'test' to Makefile.

[pdclib] / functions / string / strncat.c

diff --git a/functions/string/strncat.c b/functions/string/strncat.c
index 1bc202398636595fb72da31940acc6c4d47bdd88..d9f9fe350031d0d8f768b80024e30cf188c8cb45 100644 (file)
--- a/functions/string/strncat.c
+++ b/functions/string/strncat.c
@@ -1,26 +1,39 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
 
-char * strncat( char * restrict s1, const char * restrict s2, size_t n ) { /* TODO */ };
+/* Release $Name$ */
 
-/* PDPC code - unreviewed
+/* strncat( char *, const char *, size_t )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <_PDCLIB_aux.h>
+#include <string.h>
+
+char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
 {
-    char *p = s1;
-    size_t x = 0;
-    
-    while (*p != '\0') p++;
-    while ((*s2 != '\0') && (x < n))
+    char * rc = s1;
+    while ( *s1 )
     {
-        *p = *s2;
-        p++;
-        s2++;
-        x++;
+        ++s1;
     }
-    *p = '\0';
-    return (s1);
+    while ( n && ( *s1++ = *s2++ ) )
+    {
+        --n;
+    }
+    if ( n == 0 )
+    {
+        *s1 = '\0';
+    }
+    return rc;
 }
-*/
+
+#warning Test driver missing.
+
+#ifdef TEST
+int main()
+{
+    return 0;
+}
+#endif