1  /* Decimal 32-bit format module header for the decNumber C Library.
       2     Copyright (C) 2005-2023 Free Software Foundation, Inc.
       3     Contributed by IBM Corporation.  Author Mike Cowlishaw.
       4  
       5     This file is part of GCC.
       6  
       7     GCC is free software; you can redistribute it and/or modify it under
       8     the terms of the GNU General Public License as published by the Free
       9     Software Foundation; either version 3, or (at your option) any later
      10     version.
      11  
      12     GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13     WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15     for more details.
      16  
      17  Under Section 7 of GPL version 3, you are granted additional
      18  permissions described in the GCC Runtime Library Exception, version
      19  3.1, as published by the Free Software Foundation.
      20  
      21  You should have received a copy of the GNU General Public License and
      22  a copy of the GCC Runtime Library Exception along with this program;
      23  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24  <http://www.gnu.org/licenses/>.  */
      25  
      26  /* ------------------------------------------------------------------ */
      27  /* Decimal 32-bit format module header				      */
      28  /* ------------------------------------------------------------------ */
      29  
      30  #if !defined(DECIMAL32)
      31    #define DECIMAL32
      32    #define DEC32NAME	"decimal32"		      /* Short name   */
      33    #define DEC32FULLNAME "Decimal 32-bit Number"       /* Verbose name */
      34    #define DEC32AUTHOR	"Mike Cowlishaw"	      /* Who to blame */
      35  
      36    /* parameters for decimal32s */
      37    #define DECIMAL32_Bytes  4		/* length		      */
      38    #define DECIMAL32_Pmax   7		/* maximum precision (digits) */
      39    #define DECIMAL32_Emax   96		/* maximum adjusted exponent  */
      40    #define DECIMAL32_Emin  -95		/* minimum adjusted exponent  */
      41    #define DECIMAL32_Bias   101		/* bias for the exponent      */
      42    #define DECIMAL32_String 15		/* maximum string length, +1  */
      43    #define DECIMAL32_EconL  6		/* exp. continuation length   */
      44    /* highest biased exponent (Elimit-1) 			      */
      45    #define DECIMAL32_Ehigh  (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1)
      46  
      47    /* check enough digits, if pre-defined			      */
      48    #if defined(DECNUMDIGITS)
      49      #if (DECNUMDIGITS<DECIMAL32_Pmax)
      50        #error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use
      51      #endif
      52    #endif
      53  
      54    #ifndef DECNUMDIGITS
      55      #define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/
      56    #endif
      57    #ifndef DECNUMBER
      58      #include "decNumber.h"		/* context and number library */
      59    #endif
      60  
      61    /* Decimal 32-bit type, accessible by bytes */
      62    typedef struct {
      63      uint8_t bytes[DECIMAL32_Bytes];	/* decimal32: 1, 5, 6, 20 bits*/
      64      } decimal32;
      65  
      66    /* special values [top byte excluding sign bit; last two bits are   */
      67    /* don't-care for Infinity on input, last bit don't-care for NaN]   */
      68    #if !defined(DECIMAL_NaN)
      69      #define DECIMAL_NaN     0x7c	/* 0 11111 00 NaN	      */
      70      #define DECIMAL_sNaN    0x7e	/* 0 11111 10 sNaN	      */
      71      #define DECIMAL_Inf     0x78	/* 0 11110 00 Infinity	      */
      72    #endif
      73  
      74    /* ---------------------------------------------------------------- */
      75    /* Routines							      */
      76    /* ---------------------------------------------------------------- */
      77  
      78  #include "decimal32Symbols.h"
      79  
      80    #ifdef __cplusplus
      81    extern "C" {
      82    #endif
      83  
      84    /* String conversions 					      */
      85    decimal32 * decimal32FromString(decimal32 *, const char *, decContext *);
      86    char * decimal32ToString(const decimal32 *, char *);
      87    char * decimal32ToEngString(const decimal32 *, char *);
      88  
      89    /* decNumber conversions					      */
      90    decimal32 * decimal32FromNumber(decimal32 *, const decNumber *,
      91  				  decContext *);
      92    decNumber * decimal32ToNumber(const decimal32 *, decNumber *);
      93  
      94    /* Format-dependent utilities 				      */
      95    uint32_t    decimal32IsCanonical(const decimal32 *);
      96    decimal32 * decimal32Canonical(decimal32 *, const decimal32 *);
      97  
      98    #ifdef __cplusplus
      99    }
     100    #endif
     101  
     102  #endif