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Diffstat (limited to 'libdecnumber/decSingle.h')
| -rw-r--r-- | libdecnumber/decSingle.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libdecnumber/decSingle.h b/libdecnumber/decSingle.h new file mode 100644 index 0000000..8dd1bd3 --- /dev/null +++ b/libdecnumber/decSingle.h @@ -0,0 +1,101 @@ +/* decSingle module header for the decNumber C Library. + Copyright (C) 2005 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 2, or (at your option) any later + version. + + In addition to the permissions in the GNU General Public License, + the Free Software Foundation gives you unlimited permission to link + the compiled version of this file into combinations with other + programs, and to distribute those combinations without any + restriction coming from the use of this file. (The General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into a combine executable.) + + 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. + + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301, USA. */ + +/* ------------------------------------------------------------------ */ +/* decSingle.h -- Decimal 32-bit format module header */ +/* ------------------------------------------------------------------ */ +/* Please see decFloats.h for an overview and documentation details. */ +/* ------------------------------------------------------------------ */ + +#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 bytes */ + typedef struct { + uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */ + } decSingle; + + /* ---------------------------------------------------------------- */ + /* Routines -- implemented as decFloat routines in common files */ + /* ---------------------------------------------------------------- */ + + #include "decSingleSymbols.h" + + /* 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 * 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. */ + #define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn) + #define decSingleFromNumber(dq, dn, set) (decSingle *)decimal32FromNumber((decimal32 *)(dq), dn, set) + +#endif |