Current File : //usr/include/mysql/little_endian.h
/* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
Without limiting anything contained in the foregoing, this file,
which is part of C Driver for MySQL (Connector/C), is also subject to the
Universal FOSS Exception, version 1.0, a copy of which can be found at
http://oss.oracle.com/licenses/universal-foss-exception.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
Data in little-endian format.
*/
#ifndef MY_BYTE_ORDER_ARCH_OPTIMIZED
#define float4get(V,M) memcpy(&V, (M), sizeof(float))
#define float4store(V,M) memcpy(V, (&M), sizeof(float))
#define float8get(V,M) doubleget((V),(M))
#define float8store(V,M) doublestore((V),(M))
/* Bi-endian hardware.... */
#if defined(__FLOAT_WORD_ORDER) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN)
#define doublestore(T,V) do { *(((char*)T)+0)=(char) ((uchar *) &V)[4];\
*(((char*)T)+1)=(char) ((uchar *) &V)[5];\
*(((char*)T)+2)=(char) ((uchar *) &V)[6];\
*(((char*)T)+3)=(char) ((uchar *) &V)[7];\
*(((char*)T)+4)=(char) ((uchar *) &V)[0];\
*(((char*)T)+5)=(char) ((uchar *) &V)[1];\
*(((char*)T)+6)=(char) ((uchar *) &V)[2];\
*(((char*)T)+7)=(char) ((uchar *) &V)[3]; }\
while(0)
#define doubleget(V,M) do { double def_temp;\
((uchar*) &def_temp)[0]=(M)[4];\
((uchar*) &def_temp)[1]=(M)[5];\
((uchar*) &def_temp)[2]=(M)[6];\
((uchar*) &def_temp)[3]=(M)[7];\
((uchar*) &def_temp)[4]=(M)[0];\
((uchar*) &def_temp)[5]=(M)[1];\
((uchar*) &def_temp)[6]=(M)[2];\
((uchar*) &def_temp)[7]=(M)[3];\
(V) = def_temp; } while(0)
#else /* Bi-endian hardware.... */
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define doublestore(T,V) memcpy((T), (void*) &V, sizeof(double))
#define doubleget(V,M) memcpy(&V, (M), sizeof(double))
#endif /* Bi-endian hardware.... */
#endif /* !MY_BYTE_ORDER_ARCH_OPTIMIZED */
#define ushortget(V,M) do { uchar *pM= (uchar*)(M);V = uint2korr(pM);} while(0)
#define shortget(V,M) do { uchar *pM= (uchar*)(M);V = sint2korr(pM);} while(0)
#define longget(V,M) do { uchar *pM= (uchar*)(M);V = sint4korr(pM);} while(0)
#define ulongget(V,M) do { uchar *pM= (uchar*)(M);V = uint4korr(pM);} while(0)
#define shortstore(T,V) int2store(T,V)
#define longstore(T,V) int4store(T,V)
#ifndef floatstore
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define floatstore(T,V) memcpy((T), (void*) (&V), sizeof(float))
#define floatget(V,M) memcpy(&V, (M), sizeof(float))
#endif
#define longlongget(V,M) memcpy(&V, (M), sizeof(ulonglong))
#define longlongstore(T,V) memcpy((T), &V, sizeof(ulonglong))
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