1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2011 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Eclipse Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.eclipse.org/org/documents/epl-v10.html *
11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <gsf@research.att.com> *
18 * David Korn <dgk@research.att.com> *
19 * Phong Vo <kpv@research.att.com> *
20 * *
21 ***********************************************************************/
22 #pragma prototyped
23
24 #include <ast.h>
25
26 /*
27 * copy up to n bytes of string f into t
28 * trailing 0 always added to t, even if n==0
29 * pointer to the copied 0 returned
30 */
31
32 char*
strncopy(register char * t,register const char * f,size_t n)33 strncopy(register char* t, register const char* f, size_t n)
34 {
35 register char* e = t + n - 1;
36
37 do
38 {
39 if (t >= e)
40 {
41 *t = 0;
42 return t;
43 }
44 } while (*t++ = *f++);
45 return t - 1;
46 }
47