-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
-#include <__size_t.h>
+/* strncat( char *, const char *, size_t )
-char * strncat( char * restrict dest, const char * restrict src, size_t n )
+ 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>
+
+#ifndef REGTEST
+
+char * strncat( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
{
- char * tmp = dest;
- while ( *dest != '\0' )
+ char * rc = s1;
+ while ( *s1 )
+ {
+ ++s1;
+ }
+ while ( n && ( *s1++ = *s2++ ) )
{
- ++dest;
+ --n;
}
- while ( ( n-- > 0 ) && ( *src != '\0' ) )
+ if ( n == 0 )
{
- *dest++ = *src++;
+ *s1 = '\0';
}
- return tmp;
+ return rc;
+}
+
+#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