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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [libdecnumber/] [dpd/] [decimal64.h] - Blame information for rev 438

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1 24 jeremybenn
/* Decimal 64-bit format module header for the decNumber C Library.
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   Copyright (C) 2005, 2007 Free Software Foundation, Inc.
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   Contributed by IBM Corporation.  Author Mike Cowlishaw.
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   This file is part of GCC.
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   GCC is free software; you can redistribute it and/or modify it under
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   the terms of the GNU General Public License as published by the Free
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   Software Foundation; either version 2, or (at your option) any later
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   version.
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   In addition to the permissions in the GNU General Public License,
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   the Free Software Foundation gives you unlimited permission to link
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   the compiled version of this file into combinations with other
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   programs, and to distribute those combinations without any
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   restriction coming from the use of this file.  (The General Public
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   License restrictions do apply in other respects; for example, they
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   cover modification of the file, and distribution when not linked
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   into a combine executable.)
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   GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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   WARRANTY; without even the implied warranty of MERCHANTABILITY or
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   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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   for more details.
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   You should have received a copy of the GNU General Public License
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   along with GCC; see the file COPYING.  If not, write to the Free
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   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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   02110-1301, USA.  */
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/* ------------------------------------------------------------------ */
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/* Decimal 64-bit format module header                                */
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/* ------------------------------------------------------------------ */
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#if !defined(DECIMAL64)
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  #define DECIMAL64
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  #define DEC64NAME     "decimal64"                   /* Short name   */
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  #define DEC64FULLNAME "Decimal 64-bit Number"       /* Verbose name */
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  #define DEC64AUTHOR   "Mike Cowlishaw"              /* Who to blame */
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  /* parameters for decimal64s                                        */
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  #define DECIMAL64_Bytes  8            /* length                     */
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  #define DECIMAL64_Pmax   16           /* maximum precision (digits) */
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  #define DECIMAL64_Emax   384          /* maximum adjusted exponent  */
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  #define DECIMAL64_Emin  -383          /* minimum adjusted exponent  */
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  #define DECIMAL64_Bias   398          /* bias for the exponent      */
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  #define DECIMAL64_String 24           /* maximum string length, +1  */
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  #define DECIMAL64_EconL  8            /* exp. continuation length   */
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  /* highest biased exponent (Elimit-1)                               */
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  #define DECIMAL64_Ehigh  (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1)
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  /* check enough digits, if pre-defined                              */
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  #if defined(DECNUMDIGITS)
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    #if (DECNUMDIGITS<DECIMAL64_Pmax)
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      #error decimal64.h needs pre-defined DECNUMDIGITS>=16 for safe use
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    #endif
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  #endif
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  #ifndef DECNUMDIGITS
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    #define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined*/
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  #endif
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  #ifndef DECNUMBER
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    #include "decNumber.h"              /* context and number library */
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  #endif
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  /* Decimal 64-bit type, accessible by bytes                         */
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  typedef struct {
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    uint8_t bytes[DECIMAL64_Bytes];     /* decimal64: 1, 5, 8, 50 bits*/
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    } decimal64;
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  /* special values [top byte excluding sign bit; last two bits are   */
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  /* don't-care for Infinity on input, last bit don't-care for NaN]   */
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  #if !defined(DECIMAL_NaN)
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    #define DECIMAL_NaN     0x7c        /* 0 11111 00 NaN             */
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    #define DECIMAL_sNaN    0x7e        /* 0 11111 10 sNaN            */
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    #define DECIMAL_Inf     0x78        /* 0 11110 00 Infinity        */
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  #endif
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  /* ---------------------------------------------------------------- */
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  /* Routines                                                         */
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  /* ---------------------------------------------------------------- */
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  #include "decimal64Symbols.h"
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  /* String conversions                                               */
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  decimal64 * decimal64FromString(decimal64 *, const char *, decContext *);
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  char * decimal64ToString(const decimal64 *, char *);
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  char * decimal64ToEngString(const decimal64 *, char *);
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  /* decNumber conversions                                            */
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  decimal64 * decimal64FromNumber(decimal64 *, const decNumber *,
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                                  decContext *);
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  decNumber * decimal64ToNumber(const decimal64 *, decNumber *);
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  /* Format-dependent utilities                                       */
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  uint32_t    decimal64IsCanonical(const decimal64 *);
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  decimal64 * decimal64Canonical(decimal64 *, const decimal64 *);
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#endif

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