diff options
Diffstat (limited to 'include/little_endian.h')
| -rw-r--r-- | include/little_endian.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/include/little_endian.h b/include/little_endian.h new file mode 100644 index 00000000..dcddbdd9 --- /dev/null +++ b/include/little_endian.h @@ -0,0 +1,75 @@ +/* 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)) |