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✏️ Editing: myisampack.h

#ifndef MYISAMPACK_INCLUDED
#define MYISAMPACK_INCLUDED

/* Copyright (c) 2000-2002, 2004 MySQL AB, 2009 Sun Microsystems, Inc.
   Copyright (c) 2020, MariaDB Corporation.
   Use is subject to license terms.

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 */

/*
  Storing of values in high byte first order.

integer keys and file pointers are stored with high byte first to get
  better compression
*/

/* these two are for uniformity */
#define mi_sint1korr(A) ((int8)(*A))
#define mi_uint1korr(A) ((uint8)(*A))

#define mi_sint2korr(A) ((int16) (((int16) (((const uchar*) (A))[1])) |\
                                  ((int16) ((uint16) ((const uchar*) (A))[0]) << 8)))
#define mi_sint3korr(A) ((int32) (((((const uchar*) (A))[0]) & 128) ? \
                                  (((uint32) 255L << 24) | \
                                   (((uint32) ((const uchar*) (A))[0]) << 16) |\
                                   (((uint32) ((const uchar*) (A))[1]) << 8) | \
                                   ((uint32) ((const uchar*) (A))[2])) : \
                                  (((uint32) ((const uchar*) (A))[0]) << 16) |\
                                  (((uint32) ((const uchar*) (A))[1]) << 8) | \
                                  ((uint32) ((const uchar*) (A))[2])))
#define mi_sint4korr(A) ((int32) (((uint32) (((const uchar*) (A))[3])) |\
                                  ((uint32) (((const uchar*) (A))[2]) << 8) |\
                                  ((uint32) (((const uchar*) (A))[1]) << 16) |\
                                  ((uint32) (((const uchar*) (A))[0]) << 24)))
#define mi_sint8korr(A) ((longlong) mi_uint8korr(A))
#define mi_uint2korr(A) ((uint16) (((uint16) (((const uchar*) (A))[1])) |\
                                   ((uint16) (((const uchar*) (A))[0]) << 8)))
#define mi_uint3korr(A) ((uint32) (((uint32) (((const uchar*) (A))[2])) |\
                                   (((uint32) (((const uchar*) (A))[1])) << 8) |\
                                   (((uint32) (((const uchar*) (A))[0])) << 16)))
#define mi_uint4korr(A) ((uint32) (((uint32) (((const uchar*) (A))[3])) |\
                                   (((uint32) (((const uchar*) (A))[2])) << 8) |\
                                   (((uint32) (((const uchar*) (A))[1])) << 16) |\
                                   (((uint32) (((const uchar*) (A))[0])) << 24)))

#ifndef HAVE_mi_uint5korr
#define mi_uint5korr(A) ((ulonglong)(((uint32) (((const uchar*) (A))[4])) |\
                                    (((uint32) (((const uchar*) (A))[3])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[2])) << 16) |\
                                    (((uint32) (((const uchar*) (A))[1])) << 24)) |\
                                    (((ulonglong) (((const uchar*) (A))[0])) << 32))
#endif /* HAVE_mi_uint5korr */

#ifndef HAVE_mi_uint6korr
#define mi_uint6korr(A) ((ulonglong)(((uint32) (((const uchar*) (A))[5])) |\
                                    (((uint32) (((const uchar*) (A))[4])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[3])) << 16) |\
                                    (((uint32) (((const uchar*) (A))[2])) << 24)) |\
                        (((ulonglong) (((uint32) (((const uchar*) (A))[1])) |\
                                    (((uint32) (((const uchar*) (A))[0]) << 8)))) <<\
                                     32))
#endif /* HAVE_mi_uint6korr */

#ifndef HAVE_mi_uint7korr
#define mi_uint7korr(A) ((ulonglong)(((uint32) (((const uchar*) (A))[6])) |\
                                    (((uint32) (((const uchar*) (A))[5])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[4])) << 16) |\
                                    (((uint32) (((const uchar*) (A))[3])) << 24)) |\
                        (((ulonglong) (((uint32) (((const uchar*) (A))[2])) |\
                                    (((uint32) (((const uchar*) (A))[1])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[0])) << 16))) <<\
                                     32))
#endif /* HAVE_mi_uint7korr */

#ifndef HAVE_mi_uint8korr
#define mi_uint8korr(A) ((ulonglong)(((uint32) (((const uchar*) (A))[7])) |\
                                    (((uint32) (((const uchar*) (A))[6])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[5])) << 16) |\
                                    (((uint32) (((const uchar*) (A))[4])) << 24)) |\
                        (((ulonglong) (((uint32) (((const uchar*) (A))[3])) |\
                                    (((uint32) (((const uchar*) (A))[2])) << 8) |\
                                    (((uint32) (((const uchar*) (A))[1])) << 16) |\
                                    (((uint32) (((const uchar*) (A))[0])) << 24))) <<\
                                    32))
#endif /* HAVE_mi_uint8korr */

/* This one is for uniformity */
#define mi_int1store(T,A) *((uchar*)(T))= (uchar) (A)

#define mi_int2store(T,A)   { uint def_temp= (uint) (A) ;\
                              ((uchar*) (T))[1]= (uchar) (def_temp);\
                              ((uchar*) (T))[0]= (uchar) (def_temp >> 8); }
#define mi_int3store(T,A)   { /*lint -save -e734 */\
                              ulong def_temp= (ulong) (A);\
                              ((uchar*) (T))[2]= (uchar) (def_temp);\
                              ((uchar*) (T))[1]= (uchar) (def_temp >> 8);\
                              ((uchar*) (T))[0]= (uchar) (def_temp >> 16);\
                              /*lint -restore */}
#define mi_int4store(T,A)   { ulong def_temp= (ulong) (A);\
                              ((uchar*) (T))[3]= (uchar) (def_temp);\
                              ((uchar*) (T))[2]= (uchar) (def_temp >> 8);\
                              ((uchar*) (T))[1]= (uchar) (def_temp >> 16);\
                              ((uchar*) (T))[0]= (uchar) (def_temp >> 24); }
#define mi_int5store(T,A)   { ulong def_temp= (ulong) (A),\
                              def_temp2= (ulong) ((A) >> 32);\
                              ((uchar*) (T))[4]= (uchar) (def_temp);\
                              ((uchar*) (T))[3]= (uchar) (def_temp >> 8);\
                              ((uchar*) (T))[2]= (uchar) (def_temp >> 16);\
                              ((uchar*) (T))[1]= (uchar) (def_temp >> 24);\
                              ((uchar*) (T))[0]= (uchar) (def_temp2); }
#define mi_int6store(T,A)   { ulong def_temp= (ulong) (A),\
                              def_temp2= (ulong) ((A) >> 32);\
                              ((uchar*) (T))[5]= (uchar) (def_temp);\
                              ((uchar*) (T))[4]= (uchar) (def_temp >> 8);\
                              ((uchar*) (T))[3]= (uchar) (def_temp >> 16);\
                              ((uchar*) (T))[2]= (uchar) (def_temp >> 24);\
                              ((uchar*) (T))[1]= (uchar) (def_temp2);\
                              ((uchar*) (T))[0]= (uchar) (def_temp2 >> 8); }
#define mi_int7store(T,A)   { ulong def_temp= (ulong) (A),\
                              def_temp2= (ulong) ((A) >> 32);\
                              ((uchar*) (T))[6]= (uchar) (def_temp);\
                              ((uchar*) (T))[5]= (uchar) (def_temp >> 8);\
                              ((uchar*) (T))[4]= (uchar) (def_temp >> 16);\
                              ((uchar*) (T))[3]= (uchar) (def_temp >> 24);\
                              ((uchar*) (T))[2]= (uchar) (def_temp2);\
                              ((uchar*) (T))[1]= (uchar) (def_temp2 >> 8);\
                              ((uchar*) (T))[0]= (uchar) (def_temp2 >> 16); }
#define mi_int8store(T,A)   { ulong def_temp3= (ulong) (A),\
                              def_temp4= (ulong) ((A) >> 32);\
                              mi_int4store((uchar*) (T) + 0, def_temp4);\
                              mi_int4store((uchar*) (T) + 4, def_temp3); }

#ifdef WORDS_BIGENDIAN

#define mi_float4store(T,A) { ((uchar*) (T))[0]= ((uchar*) &A)[0];\
                              ((uchar*) (T))[1]= ((uchar*) &A)[1];\
                              ((uchar*) (T))[2]= ((uchar*) &A)[2];\
                              ((uchar*) (T))[3]= ((uchar*) &A)[3]; }

#define mi_float4get(V,M)   { float def_temp;\
                              ((uchar*) &def_temp)[0]= ((const uchar*) (M))[0];\
                              ((uchar*) &def_temp)[1]= ((const uchar*) (M))[1]; \
                              ((uchar*) &def_temp)[2]= ((const uchar*) (M))[2];\
                              ((uchar*) &def_temp)[3]= ((const uchar*) (M))[3];\
                              (V)= def_temp; }

#define mi_float8store(T,V) { ((uchar*) (T))[0]= ((const uchar*) &V)[0];\
                              ((uchar*) (T))[1]= ((const uchar*) &V)[1];\
                              ((uchar*) (T))[2]= ((const uchar*) &V)[2];\
                              ((uchar*) (T))[3]= ((const uchar*) &V)[3];\
                              ((uchar*) (T))[4]= ((const uchar*) &V)[4];\
                              ((uchar*) (T))[5]= ((const uchar*) &V)[5];\
                              ((uchar*) (T))[6]= ((const uchar*) &V)[6];\
                              ((uchar*) (T))[7]= ((const uchar*) &V)[7]; }

#define mi_float8get(V,M)   { double def_temp;\
                              ((uchar*) &def_temp)[0]= ((const uchar*) (M))[0];\
                              ((uchar*) &def_temp)[1]= ((const uchar*) (M))[1];\
                              ((uchar*) &def_temp)[2]= ((const uchar*) (M))[2];\
                              ((uchar*) &def_temp)[3]= ((const uchar*) (M))[3];\
                              ((uchar*) &def_temp)[4]= ((const uchar*) (M))[4];\
                              ((uchar*) &def_temp)[5]= ((const uchar*) (M))[5];\
                              ((uchar*) &def_temp)[6]= ((const uchar*) (M))[6];\
                              ((uchar*) &def_temp)[7]= ((const uchar*) (M))[7]; \
                              (V)= def_temp; }
#else

#define mi_float4store(T,A) { ((uchar*) (T))[0]= ((const uchar*) &A)[3];\
                              ((uchar*) (T))[1]= ((const uchar*) &A)[2];\
                              ((uchar*) (T))[2]= ((const uchar*) &A)[1];\
                              ((uchar*) (T))[3]= ((const uchar*) &A)[0]; }

#define mi_float4get(V,M)   { float def_temp;\
                              ((uchar*) &def_temp)[0]= ((const uchar*) (M))[3];\
                              ((uchar*) &def_temp)[1]= ((const uchar*) (M))[2];\
                              ((uchar*) &def_temp)[2]= ((const uchar*) (M))[1];\
                              ((uchar*) &def_temp)[3]= ((const uchar*) (M))[0];\
                              (V)= def_temp; }

#if defined(__FLOAT_WORD_ORDER) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN)
#define mi_float8store(T,V) { ((uchar*) (T))[0]= ((const uchar*) &V)[3];\
                              ((uchar*) (T))[1]= ((const uchar*) &V)[2];\
                              ((uchar*) (T))[2]= ((const uchar*) &V)[1];\
                              ((uchar*) (T))[3]= ((const uchar*) &V)[0];\
                              ((uchar*) (T))[4]= ((const uchar*) &V)[7];\
                              ((uchar*) (T))[5]= ((const uchar*) &V)[6];\
                              ((uchar*) (T))[6]= ((const uchar*) &V)[5];\
                              ((uchar*) (T))[7]= ((const uchar*) &V)[4];}

#define mi_float8get(V,M)   { double def_temp;\
                              ((uchar*) &def_temp)[0]= ((const uchar*) (M))[3];\
                              ((uchar*) &def_temp)[1]= ((const uchar*) (M))[2];\
                              ((uchar*) &def_temp)[2]= ((const uchar*) (M))[1];\
                              ((uchar*) &def_temp)[3]= ((const uchar*) (M))[0];\
                              ((uchar*) &def_temp)[4]= ((const uchar*) (M))[7];\
                              ((uchar*) &def_temp)[5]= ((const uchar*) (M))[6];\
                              ((uchar*) &def_temp)[6]= ((const uchar*) (M))[5];\
                              ((uchar*) &def_temp)[7]= ((const uchar*) (M))[4];\
                              (V)= def_temp; }

#else
#define mi_float8store(T,V) { ((uchar*) (T))[0]= ((const uchar*) &V)[7];\
                              ((uchar*) (T))[1]= ((const uchar*) &V)[6];\
                              ((uchar*) (T))[2]= ((const uchar*) &V)[5];\
                              ((uchar*) (T))[3]= ((const uchar*) &V)[4];\
                              ((uchar*) (T))[4]= ((const uchar*) &V)[3];\
                              ((uchar*) (T))[5]= ((const uchar*) &V)[2];\
                              ((uchar*) (T))[6]= ((const uchar*) &V)[1];\
                              ((uchar*) (T))[7]= ((const uchar*) &V)[0];}

#define mi_float8get(V,M)   { double def_temp;\
                              ((uchar*) &def_temp)[0]= ((const uchar*) (M))[7];\
                              ((uchar*) &def_temp)[1]= ((const uchar*) (M))[6];\
                              ((uchar*) &def_temp)[2]= ((const uchar*) (M))[5];\
                              ((uchar*) &def_temp)[3]= ((const uchar*) (M))[4];\
                              ((uchar*) &def_temp)[4]= ((const uchar*) (M))[3];\
                              ((uchar*) &def_temp)[5]= ((const uchar*) (M))[2];\
                              ((uchar*) &def_temp)[6]= ((const uchar*) (M))[1];\
                              ((uchar*) &def_temp)[7]= ((const uchar*) (M))[0];\
                              (V)= def_temp; }
#endif /* __FLOAT_WORD_ORDER */
#endif /* WORDS_BIGENDIAN */

/* Fix to avoid warnings when sizeof(ha_rows) == sizeof(long) */

#ifdef BIG_TABLES
#define mi_rowstore(T,A)    mi_int8store(T, A)
#define mi_rowkorr(T)       mi_uint8korr(T)
#else
#define mi_rowstore(T,A)    { mi_int4store(T, 0);\
                              mi_int4store(((uchar*) (T) + 4), A); }
#define mi_rowkorr(T)       mi_uint4korr((const uchar*) (T) + 4)
#endif

#if SIZEOF_OFF_T > 4
#define mi_sizestore(T,A)   mi_int8store(T, A)
#define mi_sizekorr(T)      mi_uint8korr(T)
#else
#define mi_sizestore(T,A)   { if ((A) == HA_OFFSET_ERROR)\
                                bfill((char*) (T), 8, 255);\
                              else { mi_int4store((T), 0);\
                                     mi_int4store(((T) + 4), A); }}
#define mi_sizekorr(T)      mi_uint4korr((const uchar*) (T) + 4)
#endif
#endif /* MYISAMPACK_INCLUDED */

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