1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin 24*4887Schin #include <ast.h> 25*4887Schin 26*4887Schin #if _lib_memmove 27*4887Schin 28*4887Schin NoN(memmove) 29*4887Schin 30*4887Schin #else 31*4887Schin 32*4887Schin void* 33*4887Schin memmove(void* to, const void* from, register size_t n) 34*4887Schin { 35*4887Schin register char* out = (char*)to; 36*4887Schin register char* in = (char*)from; 37*4887Schin 38*4887Schin if (n <= 0) /* works if size_t is signed or not */ 39*4887Schin ; 40*4887Schin else if (in + n <= out || out + n <= in) 41*4887Schin return(memcpy(to, from, n)); /* hope it's fast*/ 42*4887Schin else if (out < in) 43*4887Schin do *out++ = *in++; while (--n > 0); 44*4887Schin else 45*4887Schin { 46*4887Schin out += n; 47*4887Schin in += n; 48*4887Schin do *--out = *--in; while(--n > 0); 49*4887Schin } 50*4887Schin return(to); 51*4887Schin } 52*4887Schin 53*4887Schin #endif 54