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/* ------------------------------------------------------------------ */
/* decSingle.h -- Decimal 32-bit format module header */
/* ------------------------------------------------------------------ */
/* Copyright (c) IBM Corporation, 2000, 2008. All rights reserved. */
/* */
/* This software is made available under the terms of the */
/* ICU License -- ICU 1.8.1 and later. */
/* */
/* The description and User's Guide ("The decNumber C Library") for */
/* this software is included in the package as decNumber.pdf. This */
/* document is also available in HTML, together with specifications, */
/* testcases, and Web links, on the General Decimal Arithmetic page. */
/* */
/* Please send comments, suggestions, and corrections to the author: */
/* mfc@uk.ibm.com */
/* Mike Cowlishaw, IBM Fellow */
/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
/* ------------------------------------------------------------------ */
#if !defined(DECSINGLE)
#define DECSINGLE
#define DECSINGLENAME "decSingle" /* Short name */
#define DECSINGLETITLE "Decimal 32-bit datum" /* Verbose name */
#define DECSINGLEAUTHOR "Mike Cowlishaw" /* Who to blame */
/* parameters for decSingles */
#define DECSINGLE_Bytes 4 /* length */
#define DECSINGLE_Pmax 7 /* maximum precision (digits) */
#define DECSINGLE_Emin -95 /* minimum adjusted exponent */
#define DECSINGLE_Emax 96 /* maximum adjusted exponent */
#define DECSINGLE_EmaxD 3 /* maximum exponent digits */
#define DECSINGLE_Bias 101 /* bias for the exponent */
#define DECSINGLE_String 16 /* maximum string length, +1 */
#define DECSINGLE_EconL 6 /* exponent continuation length */
#define DECSINGLE_Declets 2 /* count of declets */
/* highest biased exponent (Elimit-1) */
#define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1))
/* Required includes */
#include "decContext.h"
#include "decQuad.h"
#include "decDouble.h"
/* The decSingle decimal 32-bit type, accessible by all sizes */
typedef union {
uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */
uint16_t shorts[DECSINGLE_Bytes/2];
uint32_t words[DECSINGLE_Bytes/4];
} decSingle;
/* ---------------------------------------------------------------- */
/* Routines -- implemented as decFloat routines in common files */
/* ---------------------------------------------------------------- */
/* Utilities (binary argument(s) or result, extractors, etc.) */
extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t);
extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *);
extern decSingle * decSingleFromPackedChecked(decSingle *, int32_t, const uint8_t *);
extern decSingle * decSingleFromString(decSingle *, const char *, decContext *);
extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *);
extern int32_t decSingleGetCoefficient(const decSingle *, uint8_t *);
extern int32_t decSingleGetExponent(const decSingle *);
extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t);
extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t);
extern void decSingleShow(const decSingle *, const char *);
extern int32_t decSingleToBCD(const decSingle *, int32_t *, uint8_t *);
extern char * decSingleToEngString(const decSingle *, char *);
extern int32_t decSingleToPacked(const decSingle *, int32_t *, uint8_t *);
extern char * decSingleToString(const decSingle *, char *);
extern decDouble * decSingleToWider(const decSingle *, decDouble *);
extern decSingle * decSingleZero(decSingle *);
/* (No Arithmetic routines for decSingle) */
/* Non-computational */
extern uint32_t decSingleRadix(const decSingle *);
extern const char * decSingleVersion(void);
/* decNumber conversions; these are implemented as macros so as not */
/* to force a dependency on decimal32 and decNumber in decSingle. */
/* decSingleFromNumber returns a decimal32 * to avoid warnings. */
#define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn)
#define decSingleFromNumber(dq, dn, set) decimal32FromNumber((decimal32 *)(dq), dn, set)
#endif
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