/* Decimal 32-bit format module header for the decNumber C Library. Copyright (C) 2005-2017 Free Software Foundation, Inc. Contributed by IBM Corporation. Author Mike Cowlishaw. This file is part of GCC. GCC 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; either version 3, or (at your option) any later version. GCC 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. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* ------------------------------------------------------------------ */ /* Decimal 32-bit format module header */ /* ------------------------------------------------------------------ */ #if !defined(DECIMAL32) #define DECIMAL32 #define DEC32NAME "decimal32" /* Short name */ #define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */ #define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */ /* parameters for decimal32s */ #define DECIMAL32_Bytes 4 /* length */ #define DECIMAL32_Pmax 7 /* maximum precision (digits) */ #define DECIMAL32_Emax 96 /* maximum adjusted exponent */ #define DECIMAL32_Emin -95 /* minimum adjusted exponent */ #define DECIMAL32_Bias 101 /* bias for the exponent */ #define DECIMAL32_String 15 /* maximum string length, +1 */ #define DECIMAL32_EconL 6 /* exp. continuation length */ /* highest biased exponent (Elimit-1) */ #define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1) /* check enough digits, if pre-defined */ #if defined(DECNUMDIGITS) #if (DECNUMDIGITS<DECIMAL32_Pmax) #error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use #endif #endif #ifndef DECNUMDIGITS #define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/ #endif #ifndef DECNUMBER #include "decNumber.h" /* context and number library */ #endif /* Decimal 32-bit type, accessible by bytes */ typedef struct { uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/ } decimal32; /* special values [top byte excluding sign bit; last two bits are */ /* don't-care for Infinity on input, last bit don't-care for NaN] */ #if !defined(DECIMAL_NaN) #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ #endif /* ---------------------------------------------------------------- */ /* Routines */ /* ---------------------------------------------------------------- */ #include "decimal32Symbols.h" #ifdef __cplusplus extern "C" { #endif /* String conversions */ decimal32 * decimal32FromString(decimal32 *, const char *, decContext *); char * decimal32ToString(const decimal32 *, char *); char * decimal32ToEngString(const decimal32 *, char *); /* decNumber conversions */ decimal32 * decimal32FromNumber(decimal32 *, const decNumber *, decContext *); decNumber * decimal32ToNumber(const decimal32 *, decNumber *); /* Format-dependent utilities */ uint32_t decimal32IsCanonical(const decimal32 *); decimal32 * decimal32Canonical(decimal32 *, const decimal32 *); #ifdef __cplusplus } #endif #endif |