-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * Public Domain C Library - http://pdclib.sourceforge.net
- * This code is Public Domain. Use, modify, and redistribute at will.
- * --------------------------------------------------------------------------*/
+/* $Id$ */
-#include <__size_t.h>
+/* strncpy( char *, const char *, size_t )
-char * strncpy( 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>
+
+/* TODO: Debuggung only */
+#include <stdio.h>
+
+#ifndef REGTEST
+
+char * strncpy( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
{
- char * tmp = dest;
- while ( ( n-- != 0 ) && ( ( *dest++ = *src++ ) != '\0' ) )
+ char * rc = s1;
+ while ( ( n > 0 ) && ( *s1++ = *s2++ ) )
{
- /* EMPTY */
+ /* Cannot do "n--" in the conditional as size_t is unsigned and we have
+ to check it again for >0 in the next loop.
+ */
+ --n;
}
- while ( n-- != 0 )
+ /* TODO: This works correctly, but somehow the handling of n is ugly as
+ hell.
+ */
+ if ( n > 0 )
{
- *dest++ = '\0';
+ while ( --n )
+ {
+ *s1++ = '\0';
+ }
}
- return tmp;
+ return rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ char s[] = "xxxxxxx";
+ TESTCASE( strncpy( s, "", 1 ) == s );
+ TESTCASE( s[0] == '\0' );
+ TESTCASE( s[1] == 'x' );
+ TESTCASE( strncpy( s, abcde, 6 ) == s );
+ TESTCASE( s[0] == 'a' );
+ TESTCASE( s[4] == 'e' );
+ TESTCASE( s[5] == '\0' );
+ TESTCASE( s[6] == 'x' );
+ TESTCASE( strncpy( s, abcde, 7 ) == s );
+ TESTCASE( s[6] == '\0' );
+ TESTCASE( strncpy( s, "xxxx", 3 ) == s );
+ TESTCASE( s[0] == 'x' );
+ TESTCASE( s[2] == 'x' );
+ TESTCASE( s[3] == 'd' );
+ return TEST_RESULTS;
}
+#endif