fastmemcpy.hxx
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上传日期:2013-07-25
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- #ifndef FASTMEMCPY_HXX_
- #define FASTMEMCPY_HXX_
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const fastmemcpy_hxx_Version =
- "$Id: fastmemcpy.hxx,v 1.6 2000/12/18 23:49:08 bko Exp $";
- #define USE_DUFFS_DEVICE 1
- #define USE_MEMCPY 0
- #define USE_FASTMEMCPY 0
- #ifndef INLINE_
- #define INLINE_ inline
- #endif
- #if USE_FASTMEMCPY
- INLINE_ void fastmemcopy(char* dest, char* src, int count)
- {
- long long* s = reinterpret_cast < long long* > (src);
- long long* d = reinterpret_cast < long long* > (dest);
- int numberLongWords = (count + 7) / 8;
- while (numberLongWords--)
- {
- *(d++) = *(s++);
- }
- }
- #endif
- #if USE_DUFFS_DEVICE
- INLINE_ void* fastmemcopy(char* dest, char* src, int len)
- {
- const long long* s = reinterpret_cast < const long long* > (src);
- long long* d = reinterpret_cast < long long* > (dest);
- int numberLongWords = (len + 7) / 8;
- int count = (numberLongWords + 7) / 8;
- switch (numberLongWords % 8)
- {
- case 0:
- do
- {
- *(d++) = *(s++);
- case 7:
- *(d++) = *(s++);
- case 6:
- *(d++) = *(s++);
- case 5:
- *(d++) = *(s++);
- case 4:
- *(d++) = *(s++);
- case 3:
- *(d++) = *(s++);
- case 2:
- *(d++) = *(s++);
- case 1:
- *(d++) = *(s++);
- }
- while (--count > 0);
- }
- return dest;
- }
- #endif
- #if USE_MEMCPY
- #define fastmemcopy(a,b,c) memcpy(a,b,c)
- #endif
- INLINE_ void mymemcopy(char* dest, const char* src, int count)
- {
- memcpy(dest, src, count);
- }
- #endif