Algol 68 Genie

a68g-stddef.h

     
   1  //! @file a68g-stddef.h
   2  //! @author J. Marcel van der Veer
   3  
   4  //! @section Copyright
   5  //!
   6  //! This file is part of Algol68G - an Algol 68 compiler-interpreter.
   7  //! Copyright 2001-2024 J. Marcel van der Veer [algol68g@xs4all.nl].
   8  
   9  //! @section License
  10  //!
  11  //! This program is free software; you can redistribute it and/or modify it 
  12  //! under the terms of the GNU General Public License as published by the 
  13  //! Free Software Foundation; either version 3 of the License, or 
  14  //! (at your option) any later version.
  15  //!
  16  //! This program is distributed in the hope that it will be useful, but 
  17  //! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  18  //! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 
  19  //! more details. You should have received a copy of the GNU General Public 
  20  //! License along with this program. If not, see [http://www.gnu.org/licenses/].
  21  
  22  //! @section Synopsis
  23  //!
  24  //! Various standard definitions.
  25  
  26  #if !defined (__A68G_STDDEF_H__)
  27  #define __A68G_STDDEF_H__ 
  28  
  29  #define DOUBLE_ACCURACY (A68_REAL_DIG - 1)
  30  
  31  #define A68_BITS_WIDTH ((int) (1 + ceil (log ((REAL_T) A68_MAX_INT) / log ((REAL_T) 2))))
  32  #define A68_INT_WIDTH ((int) (1 + floor (log ((REAL_T) A68_MAX_INT) / log ((REAL_T) 10))))
  33  #define A68_LONG_INT_WIDTH (1 + A68_LONG_WIDTH)
  34  #define A68_REF_SIZE (SIZE_ALIGNED (A68_REF))
  35  #define A68_SOUND_BYTES(s) ((int) (BITS_PER_SAMPLE (s)) / 8 + (int) (BITS_PER_SAMPLE (s) % 8 == 0 ? 0 : 1))
  36  #define A68_SOUND_DATA_SIZE(s) ((int) (NUM_SAMPLES (s)) * (int) (NUM_CHANNELS (s)) * (int) (A68_SOUND_BYTES (s)))
  37  #define A68_UNION_SIZE (SIZE_ALIGNED (A68_UNION))
  38  
  39  // Multi-precision parameters
  40  #define A68_LONG_LONG_EXP_WIDTH (A68_EXP_WIDTH)
  41  #define A68_LONG_LONG_INT_WIDTH (1 + A68_LONG_LONG_WIDTH)
  42  #define A68_LONG_LONG_REAL_WIDTH ((long_mp_digits() - 1) * LOG_MP_RADIX)
  43  #define A68_LONG_LONG_WIDTH (long_mp_digits() * LOG_MP_RADIX)
  44  
  45  // Other WIDTHs
  46  #define A68_BYTES_WIDTH 32
  47  #define A68_LONG_BYTES_WIDTH 256
  48  #define MAX_REAL_EXPO 511
  49  
  50  #if (A68_LEVEL >= 3)
  51  
  52  #define A68_REAL_WIDTH (A68_REAL_DIG)
  53  #define A68_MAX_BITS (ULLONG_MAX)
  54  #define A68_LONG_WIDTH (2 * A68_INT_WIDTH + 1)
  55  #define A68_LONG_REAL_WIDTH (A68_DOUBLE_DIG - 1)
  56  #define A68_EXP_WIDTH ((int) (1 + log10 ((REAL_T) A68_REAL_MAX_EXP)))
  57  #define A68_LONG_EXP_WIDTH ((int) (1 + log10 ((REAL_T) A68_DOUBLE_MAX_EXP)))
  58  #define A68_LONG_BITS_WIDTH (2 * A68_BITS_WIDTH)
  59  #define D_SIGN 0x8000000000000000LL
  60  #define NaN_MP ((MP_T *) NULL)
  61  #define MP_RADIX 1000000000
  62  #define LOG_MP_RADIX 9
  63  #define MP_RADIX_Q MP_RADIX##q
  64  #define DEFAULT_DOUBLE_DIGITS 4
  65  #define LONG_MP_DIGITS DEFAULT_DOUBLE_DIGITS
  66  #define LONG_LONG_MP_DIGITS width_to_mp_digits (4 * A68_REAL_DIG + A68_REAL_DIG / 2)
  67  #define MAX_MP_EXPONENT 111111 // Arbitrary. Largest range is A68_MAX_INT / Log A68_MAX_INT / LOG_MP_RADIX
  68  #define MAX_REPR_INT 9223372036854775808.0 // 2^63, max int in an extended double (no implicit bit, so 62-bit mantissa)
  69  #define MAX_DOUBLE_EXPO 4932
  70  
  71  #else // if (A68_LEVEL <= 2)
  72  
  73  #define A68_REAL_WIDTH (A68_REAL_DIG)
  74  #define A68_MAX_BITS (UINT_MAX)
  75  #define A68_LONG_WIDTH (LONG_MP_DIGITS * LOG_MP_RADIX)
  76  #define A68_LONG_REAL_WIDTH ((LONG_MP_DIGITS - 1) * LOG_MP_RADIX)
  77  #define A68_EXP_WIDTH ((int) (1 + log10 ((REAL_T) A68_REAL_MAX_EXP)))
  78  #define A68_LONG_EXP_WIDTH (A68_EXP_WIDTH)
  79  #define D_SIGN 0x80000000L
  80  #define MP_BITS_BITS 23
  81  #define MP_BITS_RADIX 8388608   // Max power of two smaller than MP_RADIX
  82  #define NaN_MP ((MP_T *) NULL)
  83  #define MP_RADIX 10000000
  84  #define MP_RADIX_Q MP_RADIX##q
  85  #define LOG_MP_RADIX 7
  86  #define DEFAULT_DOUBLE_DIGITS 6
  87  #define LONG_MP_DIGITS DEFAULT_DOUBLE_DIGITS
  88  #define LONG_LONG_MP_DIGITS width_to_mp_digits (4 * A68_REAL_DIG + A68_REAL_DIG / 2)
  89  #define MAX_MP_EXPONENT 142857          // Arbitrary. Largest range is A68_MAX_INT / Log A68_MAX_INT / LOG_MP_RADIX
  90  #define MAX_REPR_INT 9007199254740992.0 // 2^53, max int in a double
  91  
  92  #endif
  93  
  94  #endif
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