/*********************************************************************** * * * This software is part of the ast package * * Copyright (c) 1985-2011 AT&T Intellectual Property * * and is licensed under the * * Common Public License, Version 1.0 * * by AT&T Intellectual Property * * * * A copy of the License is available at * * http://www.opensource.org/licenses/cpl1.0.txt * * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * * * * Information and Software Systems Research * * AT&T Research * * Florham Park NJ * * * * Glenn Fowler <gsf@research.att.com> * * David Korn <dgk@research.att.com> * * Phong Vo <kpv@research.att.com> * * * ***********************************************************************/ #pragma prototyped #include <ast.h> #if _lib_memmove NoN(memmove) #else void* memmove(void* to, const void* from, register size_t n) { register char* out = (char*)to; register char* in = (char*)from; if (n <= 0) /* works if size_t is signed or not */ ; else if (in + n <= out || out + n <= in) return(memcpy(to, from, n)); /* hope it's fast*/ else if (out < in) do *out++ = *in++; while (--n > 0); else { out += n; in += n; do *--out = *--in; while(--n > 0); } return(to); } #endif