code_production/db/include/x86/my_byteorder.h

#ifndef MY_BYTEORDER_INCLUDED
#define MY_BYTEORDER_INCLUDED

/* Copyright (c) 2001, 2022, Oracle and/or its affiliates.

   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 */


/*
  Functions for reading and storing in machine independent
  format (low byte first). There are 'korr' (assume 'corrector') variants
  for integer types, but 'get' (assume 'getter') for floating point types.
*/
#if defined(__i386__) || defined(_WIN32) || defined(__x86_64__)
#include "byte_order_generic_x86.h"
#else
#include "byte_order_generic.h"
#endif

static inline int32 sint3korr(const uchar *A)
{
  return
    ((int32) (((A[2]) & 128) ?
              (((uint32) 255L << 24) |
               (((uint32) A[2]) << 16) |
               (((uint32) A[1]) << 8) |
               ((uint32) A[0])) :
              (((uint32) A[2]) << 16) |
              (((uint32) A[1]) << 8) |
              ((uint32) A[0])))
    ;
}

static inline uint32 uint3korr(const uchar *A)
{
  return
    (uint32) (((uint32) (A[0])) +
              (((uint32) (A[1])) << 8) +
              (((uint32) (A[2])) << 16))
    ;
}

static inline ulonglong uint5korr(const uchar *A)
{
  return
    ((ulonglong)(((uint32) (A[0])) +
                 (((uint32) (A[1])) << 8) +
                 (((uint32) (A[2])) << 16) +
                 (((uint32) (A[3])) << 24)) +
     (((ulonglong) (A[4])) << 32))
    ;
}

static inline ulonglong uint6korr(const uchar *A)
{
  return
    ((ulonglong)(((uint32) (A[0]))          +
                 (((uint32) (A[1])) << 8)   +
                 (((uint32) (A[2])) << 16)  +
                 (((uint32) (A[3])) << 24)) +
     (((ulonglong) (A[4])) << 32) +
     (((ulonglong) (A[5])) << 40))
    ;
}

static inline void int3store(uchar *T, uint A)
{
  *(T)=   (uchar) (A);
  *(T+1)= (uchar) (A >> 8);
  *(T+2)= (uchar) (A >> 16);
}

static inline void int5store(uchar *T, ulonglong A)
{
  *(T)=   (uchar) (A);
  *(T+1)= (uchar) (A >> 8);
  *(T+2)= (uchar) (A >> 16);
  *(T+3)= (uchar) (A >> 24);
  *(T+4)= (uchar) (A >> 32);
}

static inline void int6store(uchar *T, ulonglong A)
{
  *(T)=   (uchar) (A);
  *(T+1)= (uchar) (A >> 8);
  *(T+2)= (uchar) (A >> 16);
  *(T+3)= (uchar) (A >> 24);
  *(T+4)= (uchar) (A >> 32);
  *(T+5)= (uchar) (A >> 40);
}

#ifdef __cplusplus

static inline int16 sint2korr(const char *pT)
{
  return sint2korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline uint16    uint2korr(const char *pT)
{
  return uint2korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline uint32    uint3korr(const char *pT)
{
  return uint3korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline int32     sint3korr(const char *pT)
{
  return sint3korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline uint32    uint4korr(const char *pT)
{
  return uint4korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline int32     sint4korr(const char *pT)
{
  return sint4korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline ulonglong uint6korr(const char *pT)
{
  return uint6korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline ulonglong uint8korr(const char *pT)
{
  return uint8korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}

static inline longlong  sint8korr(const char *pT)
{
  return sint8korr(static_cast<const uchar*>(static_cast<const void*>(pT)));
}


static inline void int2store(char *pT, uint16 A)
{
  int2store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

static inline void int3store(char *pT, uint A)
{
  int3store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

static inline void int4store(char *pT, uint32 A)
{
  int4store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

static inline void int5store(char *pT, ulonglong A)
{
  int5store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

static inline void int6store(char *pT, ulonglong A)
{
  int6store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

static inline void int8store(char *pT, ulonglong A)
{
  int8store(static_cast<uchar*>(static_cast<void*>(pT)), A);
}

#endif  /* __cplusplus */

/*
  Functions for reading and storing in machine format from/to
  short/long to/from some place in memory V should be a variable
  and M a pointer to byte.
*/
#ifdef WORDS_BIGENDIAN
#include "big_endian.h"
#else
#include "little_endian.h"
#endif

#ifdef __cplusplus

static inline void float4store(char *V, float M)
{
  float4store(static_cast<uchar*>(static_cast<void*>(V)), M);
}

static inline void float8get(double *V, const char *M)
{
  float8get(V, static_cast<const uchar*>(static_cast<const void*>(M)));
}

static inline void float8store(char *V, double M)
{
  float8store(static_cast<uchar*>(static_cast<void*>(V)), M);
}

#endif /* __cplusplus */

#endif /* MY_BYTEORDER_INCLUDED */