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//usr/include/mysql/server/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 as published by the Free Software Foundation; version 2 of the License. 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 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 02110-1335 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 #ifndef doubleget #define doubleget(V,M) memcpy(&V, (M), sizeof(double)) #define doublestore(T,V) memcpy((T), (void *) &V, sizeof(double)) #endif /* doubleget */ #define longlongget(V,M) memcpy(&V, (M), sizeof(ulonglong)) #define longlongstore(T,V) memcpy((T), &V, sizeof(ulonglong))
