1/* Decimal 32-bit format module header for the decNumber C Library. 2 Copyright (C) 2005-2022 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 17Under Section 7 of GPL version 3, you are granted additional 18permissions described in the GCC Runtime Library Exception, version 193.1, as published by the Free Software Foundation. 20 21You should have received a copy of the GNU General Public License and 22a copy of the GCC Runtime Library Exception along with this program; 23see 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 103