1*b30d1939SAndy Fiddaman /*********************************************************************** 2*b30d1939SAndy Fiddaman * * 3*b30d1939SAndy Fiddaman * This software is part of the ast package * 4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property * 5*b30d1939SAndy Fiddaman * and is licensed under the * 6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 * 7*b30d1939SAndy Fiddaman * by AT&T Intellectual Property * 8*b30d1939SAndy Fiddaman * * 9*b30d1939SAndy Fiddaman * A copy of the License is available at * 10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html * 11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12*b30d1939SAndy Fiddaman * * 13*b30d1939SAndy Fiddaman * Information and Software Systems Research * 14*b30d1939SAndy Fiddaman * AT&T Research * 15*b30d1939SAndy Fiddaman * Florham Park NJ * 16*b30d1939SAndy Fiddaman * * 17*b30d1939SAndy Fiddaman * Glenn Fowler <gsf@research.att.com> * 18*b30d1939SAndy Fiddaman * David Korn <dgk@research.att.com> * 19*b30d1939SAndy Fiddaman * Phong Vo <kpv@research.att.com> * 20*b30d1939SAndy Fiddaman * * 21*b30d1939SAndy Fiddaman ***********************************************************************/ 22*b30d1939SAndy Fiddaman #pragma prototyped 23*b30d1939SAndy Fiddaman 24*b30d1939SAndy Fiddaman #include <ast.h> 25*b30d1939SAndy Fiddaman 26*b30d1939SAndy Fiddaman #if _lib_memmove 27*b30d1939SAndy Fiddaman 28*b30d1939SAndy Fiddaman NoN(memmove) 29*b30d1939SAndy Fiddaman 30*b30d1939SAndy Fiddaman #else 31*b30d1939SAndy Fiddaman 32*b30d1939SAndy Fiddaman void* 33*b30d1939SAndy Fiddaman memmove(void* to, const void* from, register size_t n) 34*b30d1939SAndy Fiddaman { 35*b30d1939SAndy Fiddaman register char* out = (char*)to; 36*b30d1939SAndy Fiddaman register char* in = (char*)from; 37*b30d1939SAndy Fiddaman 38*b30d1939SAndy Fiddaman if (n <= 0) /* works if size_t is signed or not */ 39*b30d1939SAndy Fiddaman ; 40*b30d1939SAndy Fiddaman else if (in + n <= out || out + n <= in) 41*b30d1939SAndy Fiddaman return(memcpy(to, from, n)); /* hope it's fast*/ 42*b30d1939SAndy Fiddaman else if (out < in) 43*b30d1939SAndy Fiddaman do *out++ = *in++; while (--n > 0); 44*b30d1939SAndy Fiddaman else 45*b30d1939SAndy Fiddaman { 46*b30d1939SAndy Fiddaman out += n; 47*b30d1939SAndy Fiddaman in += n; 48*b30d1939SAndy Fiddaman do *--out = *--in; while(--n > 0); 49*b30d1939SAndy Fiddaman } 50*b30d1939SAndy Fiddaman return(to); 51*b30d1939SAndy Fiddaman } 52*b30d1939SAndy Fiddaman 53*b30d1939SAndy Fiddaman #endif 54