137 lines
4.7 KiB
C
137 lines
4.7 KiB
C
/* decNumber package local type, tuning, and macro definitions.
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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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/* This header file is included by all modules in the decNumber */
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/* library, and contains local type definitions, tuning parameters, */
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/* etc. It must only be included once, and should not need to be */
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/* used by application programs. decNumber.h must be included first. */
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/* ------------------------------------------------------------------ */
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#if !defined(DECNUMBERLOC)
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#define DECNUMBERLOC
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#define DECNLAUTHOR "Mike Cowlishaw" /* Who to blame */
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/* Local names for common types -- decNumber modules do not use int or
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long directly */
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#define Flag uint8_t
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#define Byte int8_t
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#define uByte uint8_t
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#define Short int16_t
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#define uShort uint16_t
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#define Int int32_t
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#define uInt uint32_t
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#define Unit decNumberUnit
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/* Tuning parameter */
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#define DECBUFFER 36 /* Maximum size basis for local buffers. */
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/* Should be a common maximum precision */
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/* rounded up to a multiple of 4; must */
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/* be non-negative. */
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/* Conditional code flags -- set these to 0 for best performance */
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#define DECCHECK 0 /* 1 to enable robust checking */
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#define DECALLOC 0 /* 1 to enable memory allocation accounting */
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#define DECTRACE 0 /* 1 to trace critical intermediates, etc. */
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/* Development use defines */
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#if DECALLOC
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/* if these interfere with your C includes, just comment them out */
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#define int ? /* enable to ensure we do not use plain C */
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#define long ?? /* .. 'int' or 'long' types from here on */
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#endif
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/* Limits and constants */
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#define DECNUMMAXP 999999999 /* maximum precision we can handle (9 digits) */
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#define DECNUMMAXE 999999999 /* maximum adjusted exponent ditto (9 digits) */
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#define DECNUMMINE -999999999 /* minimum adjusted exponent ditto (9 digits) */
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#if (DECNUMMAXP != DEC_MAX_DIGITS)
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#error Maximum digits mismatch
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#endif
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#if (DECNUMMAXE != DEC_MAX_EMAX)
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#error Maximum exponent mismatch
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#endif
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#if (DECNUMMINE != DEC_MIN_EMIN)
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#error Minimum exponent mismatch
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#endif
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/* Set DECDPUNMAX -- the maximum integer that fits in DECDPUN digits */
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#if DECDPUN==1
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#define DECDPUNMAX 9
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#elif DECDPUN==2
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#define DECDPUNMAX 99
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#elif DECDPUN==3
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#define DECDPUNMAX 999
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#elif DECDPUN==4
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#define DECDPUNMAX 9999
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#elif DECDPUN==5
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#define DECDPUNMAX 99999
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#elif DECDPUN==6
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#define DECDPUNMAX 999999
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#elif DECDPUN==7
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#define DECDPUNMAX 9999999
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#elif DECDPUN==8
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#define DECDPUNMAX 99999999
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#elif DECDPUN==9
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#define DECDPUNMAX 999999999
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#elif defined(DECDPUN)
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#error DECDPUN must be in the range 1-9
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#endif
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/* ----- Shared data ----- */
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/* The powers of of ten array (powers[n]==10**n, 0<=n<=10) */
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extern const uInt powers[];
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/* ----- Macros ----- */
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/* ISZERO -- return true if decNumber dn is a zero */
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/* [performance-critical in some situations] */
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#define ISZERO(dn) decNumberIsZero(dn) /* now just a local name */
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/* X10 and X100 -- multiply integer i by 10 or 100 */
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/* [shifts are usually faster than multiply; could be conditional] */
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#define X10(i) (((i)<<1)+((i)<<3))
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#define X100(i) (((i)<<2)+((i)<<5)+((i)<<6))
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/* D2U -- return the number of Units needed to hold d digits */
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#if DECDPUN==8
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#define D2U(d) ((unsigned)((d)+7)>>3)
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#elif DECDPUN==4
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#define D2U(d) ((unsigned)((d)+3)>>2)
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#else
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#define D2U(d) (((d)+DECDPUN-1)/DECDPUN)
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#endif
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#else
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#error decNumberLocal included more than once
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#endif
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