big_endian.h

/* Copyright (c) 2012, 2023, 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.

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   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
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   separately licensed software that they have included with MySQL.

   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 */

/**
  @file include/big_endian.h

  Endianness-independent definitions (little_endian.h contains optimized
  versions if you know you are on a little-endian platform).
*/

// IWYU pragma: private, include "my_byteorder.h"

#ifndef MY_BYTEORDER_INCLUDED
#error This file should never be #included directly; use my_byteorder.h.
#endif

#include <string.h>

#include "my_inttypes.h"

static inline int16 sint2korr(const uchar *A) {
  return (int16)(((int16)(A[0])) + ((int16)(A[1]) << 8));
}

static inline int32 sint4korr(const uchar *A) {
  return (int32)(((int32)(A[0])) + (((int32)(A[1]) << 8)) +
                 (((int32)(A[2]) << 16)) + (((int32)(A[3]) << 24)));
}

static inline uint16 uint2korr(const uchar *A) {
  return (uint16)(((uint16)(A[0])) + ((uint16)(A[1]) << 8));
}

static inline uint32 uint4korr(const uchar *A) {
  return (uint32)(((uint32)(A[0])) + (((uint32)(A[1])) << 8) +
                  (((uint32)(A[2])) << 16) + (((uint32)(A[3])) << 24));
}

static inline ulonglong uint8korr(const uchar *A) {
  return ((ulonglong)(((uint32)(A[0])) + (((uint32)(A[1])) << 8) +
                      (((uint32)(A[2])) << 16) + (((uint32)(A[3])) << 24)) +
          (((ulonglong)(((uint32)(A[4])) + (((uint32)(A[5])) << 8) +
                        (((uint32)(A[6])) << 16) + (((uint32)(A[7])) << 24)))
           << 32));
}

static inline longlong sint8korr(const uchar *A) {
  return (longlong)uint8korr(A);
}

static inline void int2store(uchar *T, uint16 A) {
  uint def_temp = A;
  *(T) = (uchar)(def_temp);
  *(T + 1) = (uchar)(def_temp >> 8);
}

static inline void int4store(uchar *T, uint32 A) {
  *(T) = (uchar)(A);
  *(T + 1) = (uchar)(A >> 8);
  *(T + 2) = (uchar)(A >> 16);
  *(T + 3) = (uchar)(A >> 24);
}

static inline void int7store(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);
  *(T + 6) = (uchar)(A >> 48);
}

static inline void int8store(uchar *T, ulonglong A) {
  uint def_temp = (uint)A, def_temp2 = (uint)(A >> 32);
  int4store(T, def_temp);
  int4store(T + 4, def_temp2);
}

/*
  Data in big-endian format.
*/
static inline void float4store(uchar *T, float A) {
  *(T) = ((uchar *)&A)[3];
  *((T) + 1) = (char)((uchar *)&A)[2];
  *((T) + 2) = (char)((uchar *)&A)[1];
  *((T) + 3) = (char)((uchar *)&A)[0];
}

static inline float float4get(const uchar *M) {
  float def_temp;
  ((uchar *)&def_temp)[0] = (M)[3];
  ((uchar *)&def_temp)[1] = (M)[2];
  ((uchar *)&def_temp)[2] = (M)[1];
  ((uchar *)&def_temp)[3] = (M)[0];
  return def_temp;
}

static inline void float8store(uchar *T, double V) {
  *(T) = ((uchar *)&V)[7];
  *((T) + 1) = (char)((uchar *)&V)[6];
  *((T) + 2) = (char)((uchar *)&V)[5];
  *((T) + 3) = (char)((uchar *)&V)[4];
  *((T) + 4) = (char)((uchar *)&V)[3];
  *((T) + 5) = (char)((uchar *)&V)[2];
  *((T) + 6) = (char)((uchar *)&V)[1];
  *((T) + 7) = (char)((uchar *)&V)[0];
}

static inline double float8get(const uchar *M) {
  double def_temp;
  ((uchar *)&def_temp)[0] = (M)[7];
  ((uchar *)&def_temp)[1] = (M)[6];
  ((uchar *)&def_temp)[2] = (M)[5];
  ((uchar *)&def_temp)[3] = (M)[4];
  ((uchar *)&def_temp)[4] = (M)[3];
  ((uchar *)&def_temp)[5] = (M)[2];
  ((uchar *)&def_temp)[6] = (M)[1];
  ((uchar *)&def_temp)[7] = (M)[0];
  return def_temp;
}