1da2e3ebdSchin /*********************************************************************** 2da2e3ebdSchin * * 3da2e3ebdSchin * This software is part of the ast package * 4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property * 5da2e3ebdSchin * and is licensed under the * 6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 * 77c2fbfb3SApril Chin * by AT&T Intellectual Property * 8da2e3ebdSchin * * 9da2e3ebdSchin * 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) * 12da2e3ebdSchin * * 13da2e3ebdSchin * Information and Software Systems Research * 14da2e3ebdSchin * AT&T Research * 15da2e3ebdSchin * Florham Park NJ * 16da2e3ebdSchin * * 17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18da2e3ebdSchin * David Korn <dgk@research.att.com> * 19da2e3ebdSchin * Phong Vo <kpv@research.att.com> * 20da2e3ebdSchin * * 21da2e3ebdSchin ***********************************************************************/ 22da2e3ebdSchin #pragma prototyped 23da2e3ebdSchin 24da2e3ebdSchin #include <ast.h> 25da2e3ebdSchin 26da2e3ebdSchin #if _lib_memmove 27da2e3ebdSchin 28da2e3ebdSchin NoN(memmove) 29da2e3ebdSchin 30da2e3ebdSchin #else 31da2e3ebdSchin 32da2e3ebdSchin void* 33da2e3ebdSchin memmove(void* to, const void* from, register size_t n) 34da2e3ebdSchin { 35da2e3ebdSchin register char* out = (char*)to; 36da2e3ebdSchin register char* in = (char*)from; 37da2e3ebdSchin 38da2e3ebdSchin if (n <= 0) /* works if size_t is signed or not */ 39da2e3ebdSchin ; 40da2e3ebdSchin else if (in + n <= out || out + n <= in) 41da2e3ebdSchin return(memcpy(to, from, n)); /* hope it's fast*/ 42da2e3ebdSchin else if (out < in) 43da2e3ebdSchin do *out++ = *in++; while (--n > 0); 44da2e3ebdSchin else 45da2e3ebdSchin { 46da2e3ebdSchin out += n; 47da2e3ebdSchin in += n; 48da2e3ebdSchin do *--out = *--in; while(--n > 0); 49da2e3ebdSchin } 50da2e3ebdSchin return(to); 51da2e3ebdSchin } 52da2e3ebdSchin 53da2e3ebdSchin #endif 54