104 lines
5.0 KiB
C
104 lines
5.0 KiB
C
/* decSingle module header for the decNumber C Library.
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Copyright (C) 2005 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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/* decSingle.h -- Decimal 32-bit format module header */
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/* ------------------------------------------------------------------ */
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/* Please see decFloats.h for an overview and documentation details. */
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/* ------------------------------------------------------------------ */
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#if !defined(DECSINGLE)
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#define DECSINGLE
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#define DECSINGLENAME "decSingle" /* Short name */
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#define DECSINGLETITLE "Decimal 32-bit datum" /* Verbose name */
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#define DECSINGLEAUTHOR "Mike Cowlishaw" /* Who to blame */
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/* parameters for decSingles */
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#define DECSINGLE_Bytes 4 /* length */
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#define DECSINGLE_Pmax 7 /* maximum precision (digits) */
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#define DECSINGLE_Emin -95 /* minimum adjusted exponent */
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#define DECSINGLE_Emax 96 /* maximum adjusted exponent */
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#define DECSINGLE_EmaxD 3 /* maximum exponent digits */
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#define DECSINGLE_Bias 101 /* bias for the exponent */
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#define DECSINGLE_String 16 /* maximum string length, +1 */
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#define DECSINGLE_EconL 6 /* exponent continuation length */
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#define DECSINGLE_Declets 2 /* count of declets */
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/* highest biased exponent (Elimit-1) */
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#define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1))
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/* Required includes */
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#include "decContext.h"
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#include "decQuad.h"
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#include "decDouble.h"
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/* The decSingle decimal 32-bit type, accessible by various types */
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typedef union {
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uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */
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uint16_t shorts[DECSINGLE_Bytes/2];
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uint32_t words[DECSINGLE_Bytes/4];
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} decSingle;
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/* ---------------------------------------------------------------- */
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/* Routines -- implemented as decFloat routines in common files */
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/* ---------------------------------------------------------------- */
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#include "decSingleSymbols.h"
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/* Utilities (binary argument(s) or result, extractors, etc.) */
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extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t);
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extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *);
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extern decSingle * decSingleFromString(decSingle *, const char *, decContext *);
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extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *);
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extern int32_t decSingleGetCoefficient(const decSingle *, uint8_t *);
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extern int32_t decSingleGetExponent(const decSingle *);
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extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t);
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extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t);
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extern void decSingleShow(const decSingle *, const char *);
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extern int32_t decSingleToBCD(const decSingle *, int32_t *, uint8_t *);
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extern char * decSingleToEngString(const decSingle *, char *);
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extern int32_t decSingleToPacked(const decSingle *, int32_t *, uint8_t *);
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extern char * decSingleToString(const decSingle *, char *);
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extern decDouble * decSingleToWider(const decSingle *, decDouble *);
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extern decSingle * decSingleZero(decSingle *);
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/* (No Arithmetic routines for decSingle) */
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/* Non-computational */
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extern uint32_t decSingleRadix(const decSingle *);
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extern const char * decSingleVersion(void);
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/* decNumber conversions; these are implemented as macros so as not */
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/* to force a dependency on decimal32 and decNumber in decSingle. */
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#define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn)
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#define decSingleFromNumber(dq, dn, set) (decSingle *)decimal32FromNumber((decimal32 *)(dq), dn, set)
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#endif
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