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Diffstat (limited to 'src/decNumber/decSingle.h')
| -rw-r--r-- | src/decNumber/decSingle.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/decNumber/decSingle.h b/src/decNumber/decSingle.h new file mode 100644 index 00000000..0691f7af --- /dev/null +++ b/src/decNumber/decSingle.h @@ -0,0 +1,86 @@ +/* ------------------------------------------------------------------ */
+/* 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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