X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrncat.c;h=b33fb7cf39b1f2665816bcbe36929c458aa12405;hb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;hp=624ac0387933ed1210f859e67f78a9519febfdd4;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/string/strncat.c b/functions/string/strncat.c
index 624ac03..b33fb7c 100644
--- a/functions/string/strncat.c
+++ b/functions/string/strncat.c
@@ -1,8 +1,31 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-char * strncat( char * restrict s1, const char * restrict s2, size_t n ) { /* TODO */ };
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* 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 <string.h>
+
+char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
+{
+    char * rc = s1;
+    while ( *s1 )
+    {
+        ++s1;
+    }
+    while ( n && ( *s1++ = *s2++ ) )
+    {
+        --n;
+    }
+    if ( n == 0 )
+    {
+        *s1 = '\0';
+    }
+    return rc;
+}
+
+#warning Test driver missing.