1  /* Copyright (C) 2007-2023 Free Software Foundation, Inc.
       2  
       3  This file is part of GCC.
       4  
       5  GCC is free software; you can redistribute it and/or modify it under
       6  the terms of the GNU General Public License as published by the Free
       7  Software Foundation; either version 3, or (at your option) any later
       8  version.
       9  
      10  GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11  WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13  for more details.
      14  
      15  Under Section 7 of GPL version 3, you are granted additional
      16  permissions described in the GCC Runtime Library Exception, version
      17  3.1, as published by the Free Software Foundation.
      18  
      19  You should have received a copy of the GNU General Public License and
      20  a copy of the GCC Runtime Library Exception along with this program;
      21  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      22  <http://www.gnu.org/licenses/>.  */
      23  
      24  #define decimal64FromString __dpd64FromString
      25  #define decimal64ToString __dpd64ToString
      26  #define decimal64ToEngString __dpd64ToEngString
      27  #define decimal64FromNumber __dpd64FromNumber
      28  #define decimal64ToNumber __dpd64ToNumber
      29  
      30  #include "dpd/decimal64.c"
      31  
      32  #undef decimal64FromString
      33  #undef decimal64ToString
      34  #undef decimal64ToEngString
      35  #undef decimal64FromNumber
      36  #undef decimal64ToNumber
      37  
      38  #include "bid-dpd.h"
      39  
      40  #ifdef IN_LIBGCC2
      41  #define decimal64FromString __decimal64FromString
      42  #define decimal64ToString __decimal64ToString
      43  #define decimal64ToEngString __decimal64ToEngString
      44  #define decimal64FromNumber __decimal64FromNumber
      45  #define decimal64ToNumber __decimal64ToNumber
      46  #endif
      47  
      48  decimal64 *decimal64FromString (decimal64 *, const char *, decContext *);
      49  char *decimal64ToString (const decimal64 *, char *);
      50  char *decimal64ToEngString (const decimal64 *, char *);
      51  decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *);
      52  decNumber *decimal64ToNumber (const decimal64 *, decNumber *);
      53  
      54  void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);
      55  void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);
      56  
      57  decimal64 *
      58  decimal64FromNumber (decimal64 *d64, const decNumber *dn,
      59  		      decContext *set)
      60  {
      61    /* decimal64 and _Decimal64 are different types.  */
      62    union
      63      {
      64        _Decimal64 _Dec;
      65        decimal64 dec;
      66      } u;
      67  
      68    __dpd64FromNumber (d64, dn, set);
      69  
      70    /* __dpd64FromNumber returns in big endian. But _dpd_to_bid64 takes
      71       host endian. */
      72    __ieee_to_host_64 (*d64, &u._Dec);
      73  
      74    /* Convert DPD to BID.  */
      75    _dpd_to_bid64 (&u._Dec, &u._Dec);
      76  
      77    /* dfp.c is in bid endian. */
      78    __host_to_ieee_64 (u._Dec, &u.dec);
      79  
      80    /* d64 is returned as a pointer to _Decimal64 here.  */
      81    *d64 = u.dec;
      82  
      83    return d64;
      84  }
      85  
      86  decNumber *
      87  decimal64ToNumber (const decimal64 *bid64, decNumber *dn)
      88  {
      89    /* decimal64 and _Decimal64 are different types.  */
      90    union
      91      {
      92        _Decimal64 _Dec;
      93        decimal64 dec;
      94      } u;
      95  
      96    /* bid64 is a pointer to _Decimal64 in bid endian. But _bid_to_dpd64
      97       takes host endian.  */
      98    __ieee_to_host_64 (*bid64, &u._Dec);
      99  
     100    /* Convert BID to DPD.  */
     101    _bid_to_dpd64 (&u._Dec, &u._Dec);
     102  
     103    /* __dpd64ToNumber is in bid endian.  */
     104    __host_to_ieee_64 (u._Dec, &u.dec);
     105  
     106    return __dpd64ToNumber (&u.dec, dn);
     107  }
     108  
     109  char *
     110  decimal64ToString (const decimal64 *d64, char *string)
     111  {
     112    decNumber dn;			/* work */
     113    decimal64ToNumber (d64, &dn);
     114    decNumberToString (&dn, string);
     115    return string;
     116  }
     117  
     118  char *
     119  decimal64ToEngString (const decimal64 *d64, char *string)
     120  {
     121    decNumber dn;			/* work */
     122    decimal64ToNumber (d64, &dn);
     123    decNumberToEngString (&dn, string);
     124    return string;
     125  }
     126  
     127  decimal64 *
     128  decimal64FromString (decimal64 *result, const char *string,
     129  		      decContext *set)
     130  {
     131    decContext dc;		/* work */
     132    decNumber dn;			/* .. */
     133  
     134    decContextDefault (&dc, DEC_INIT_DECIMAL64);	/* no traps, please */
     135    dc.round = set->round;	/* use supplied rounding */
     136  
     137    decNumberFromString (&dn, string, &dc);	/* will round if needed */
     138    decimal64FromNumber (result, &dn, &dc);
     139    if (dc.status != 0)
     140      {				/* something happened */
     141        decContextSetStatus (set, dc.status);	/* .. pass it on */
     142      }
     143    return result;
     144  }