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 #undef VMDEBUG
25 #define VMDEBUG 0
26
27 #include <ast.h>
28
29 /*
30 * return a copy of s using malloc
31 */
32
33 #if defined(__EXPORT__)
34 #define extern __EXPORT__
35 #endif
36
37 extern char*
strdup(register const char * s)38 strdup(register const char* s)
39 {
40 register char* t;
41 register int n;
42
43 return (s && (t = newof(0, char, n = strlen(s) + 1, 0))) ? (char*)memcpy(t, s, n) : (char*)0;
44 }
45