1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2010 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 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* 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