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Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/include/mysql/little_endian.h |
#ifndef LITTLE_ENDIAN_INCLUDED
#define LITTLE_ENDIAN_INCLUDED
/* Copyright (c) 2012, 2015, 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 02110-1301 USA */
/*
Data in little-endian format.
*/
#include <string.h>
static inline void float4get (float *V, const uchar *M)
{
memcpy(V, (M), sizeof(float));
}
static inline void float4store(uchar *V, float M)
{
memcpy(V, (&M), sizeof(float));
}
static inline void float8get (double *V, const uchar *M)
{
memcpy(V, M, sizeof(double));
}
static inline void float8store(uchar *V, double M)
{
memcpy(V, &M, sizeof(double));
}
static inline void floatget (float *V, const uchar *M) { float4get(V, M); }
static inline void floatstore (uchar *V, float M) { float4store(V, M); }
/* Bi-endian hardware.... */
#if defined(__FLOAT_WORD_ORDER) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN)
static inline void doublestore(uchar *T, double V)
{ *(((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]; }
static inline void doubleget(double *V, const uchar *M)
{ 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; }
#else /* Bi-endian hardware.... */
static inline void doublestore(uchar *T, double V) { memcpy(T, &V, sizeof(double)); }
static inline void doubleget (double *V, const uchar *M) { memcpy(V, M, sizeof(double)); }
#endif /* Bi-endian hardware.... */
static inline void ushortget(uint16 *V, const uchar *pM) { *V= uint2korr(pM); }
static inline void shortget (int16 *V, const uchar *pM) { *V= sint2korr(pM); }
static inline void longget (int32 *V, const uchar *pM) { *V= sint4korr(pM); }
static inline void ulongget (uint32 *V, const uchar *pM) { *V= uint4korr(pM); }
static inline void shortstore(uchar *T, int16 V) { int2store(T, V); }
static inline void longstore (uchar *T, int32 V) { int4store(T, V); }
static inline void longlongget(longlong *V, const uchar *M)
{
memcpy(V, (M), sizeof(ulonglong));
}
static inline void longlongstore(uchar *T, longlong V)
{
memcpy((T), &V, sizeof(ulonglong));
}
#endif /* LITTLE_ENDIAN_INCLUDED */