298 lines
10 KiB
C
298 lines
10 KiB
C
/*
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*
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* Ruby BigDecimal(Variable decimal precision) extension library.
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*
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* Copyright(C) 2002 by Shigeo Kobayashi(shigeo@tinyforest.gr.jp)
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*
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*/
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#ifndef RUBY_BIG_DECIMAL_H
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#define RUBY_BIG_DECIMAL_H 1
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#define RUBY_NO_OLD_COMPATIBILITY
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#include "ruby/ruby.h"
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#include "missing.h"
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#ifdef HAVE_FLOAT_H
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# include <float.h>
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#endif
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#ifdef HAVE_INT64_T
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# define DECDIG uint32_t
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# define DECDIG_DBL uint64_t
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# define DECDIG_DBL_SIGNED int64_t
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# define SIZEOF_DECDIG 4
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# define PRI_DECDIG_PREFIX ""
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# ifdef PRI_LL_PREFIX
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# define PRI_DECDIG_DBL_PREFIX PRI_LL_PREFIX
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# else
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# define PRI_DECDIG_DBL_PREFIX "l"
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# endif
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#else
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# define DECDIG uint16_t
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# define DECDIG_DBL uint32_t
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# define DECDIG_DBL_SIGNED int32_t
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# define SIZEOF_DECDIG 2
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# define PRI_DECDIG_PREFIX "h"
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# define PRI_DECDIG_DBL_PREFIX ""
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#endif
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#define PRIdDECDIG PRI_DECDIG_PREFIX"d"
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#define PRIiDECDIG PRI_DECDIG_PREFIX"i"
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#define PRIoDECDIG PRI_DECDIG_PREFIX"o"
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#define PRIuDECDIG PRI_DECDIG_PREFIX"u"
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#define PRIxDECDIG PRI_DECDIG_PREFIX"x"
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#define PRIXDECDIG PRI_DECDIG_PREFIX"X"
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#define PRIdDECDIG_DBL PRI_DECDIG_DBL_PREFIX"d"
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#define PRIiDECDIG_DBL PRI_DECDIG_DBL_PREFIX"i"
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#define PRIoDECDIG_DBL PRI_DECDIG_DBL_PREFIX"o"
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#define PRIuDECDIG_DBL PRI_DECDIG_DBL_PREFIX"u"
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#define PRIxDECDIG_DBL PRI_DECDIG_DBL_PREFIX"x"
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#define PRIXDECDIG_DBL PRI_DECDIG_DBL_PREFIX"X"
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#if SIZEOF_DECDIG == 4
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# define BIGDECIMAL_BASE ((DECDIG)1000000000U)
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# define BIGDECIMAL_COMPONENT_FIGURES 9
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/*
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* The number of components required for a 64-bit integer.
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*
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* INT64_MAX: 9_223372036_854775807
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* UINT64_MAX: 18_446744073_709551615
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*/
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# define BIGDECIMAL_INT64_MAX_LENGTH 3
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#elif SIZEOF_DECDIG == 2
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# define BIGDECIMAL_BASE ((DECDIG)10000U)
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# define BIGDECIMAL_COMPONENT_FIGURES 4
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/*
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* The number of components required for a 64-bit integer.
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*
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* INT64_MAX: 922_3372_0368_5477_5807
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* UINT64_MAX: 1844_6744_0737_0955_1615
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*/
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# define BIGDECIMAL_INT64_MAX_LENGTH 5
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#else
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# error Unknown size of DECDIG
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#endif
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#define BIGDECIMAL_DOUBLE_FIGURES (1+DBL_DIG)
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#if defined(__cplusplus)
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extern "C" {
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#if 0
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} /* satisfy cc-mode */
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#endif
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#endif
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extern VALUE rb_cBigDecimal;
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/*
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* NaN & Infinity
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*/
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#define SZ_NaN "NaN"
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#define SZ_INF "Infinity"
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#define SZ_PINF "+Infinity"
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#define SZ_NINF "-Infinity"
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/*
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* #define VP_EXPORT other than static to let VP_ routines
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* be called from outside of this module.
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*/
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#define VP_EXPORT static
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/* Exception codes */
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#define VP_EXCEPTION_ALL ((unsigned short)0x00FF)
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#define VP_EXCEPTION_INFINITY ((unsigned short)0x0001)
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#define VP_EXCEPTION_NaN ((unsigned short)0x0002)
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#define VP_EXCEPTION_UNDERFLOW ((unsigned short)0x0004)
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#define VP_EXCEPTION_OVERFLOW ((unsigned short)0x0001) /* 0x0008) */
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#define VP_EXCEPTION_ZERODIVIDE ((unsigned short)0x0010)
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/* Following 2 exceptions can't controlled by user */
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#define VP_EXCEPTION_OP ((unsigned short)0x0020)
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#define BIGDECIMAL_EXCEPTION_MODE_DEFAULT 0U
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/* Computation mode */
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#define VP_ROUND_MODE ((unsigned short)0x0100)
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#define VP_ROUND_UP 1
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#define VP_ROUND_DOWN 2
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#define VP_ROUND_HALF_UP 3
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#define VP_ROUND_HALF_DOWN 4
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#define VP_ROUND_CEIL 5
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#define VP_ROUND_FLOOR 6
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#define VP_ROUND_HALF_EVEN 7
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#define BIGDECIMAL_ROUNDING_MODE_DEFAULT VP_ROUND_HALF_UP
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#define VP_SIGN_NaN 0 /* NaN */
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#define VP_SIGN_POSITIVE_ZERO 1 /* Positive zero */
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#define VP_SIGN_NEGATIVE_ZERO -1 /* Negative zero */
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#define VP_SIGN_POSITIVE_FINITE 2 /* Positive finite number */
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#define VP_SIGN_NEGATIVE_FINITE -2 /* Negative finite number */
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#define VP_SIGN_POSITIVE_INFINITE 3 /* Positive infinite number */
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#define VP_SIGN_NEGATIVE_INFINITE -3 /* Negative infinite number */
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
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#define FLEXIBLE_ARRAY_SIZE /* */
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#elif defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#define FLEXIBLE_ARRAY_SIZE 0
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#else
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#define FLEXIBLE_ARRAY_SIZE 1
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#endif
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/*
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* VP representation
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* r = 0.xxxxxxxxx *BASE**exponent
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*/
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typedef struct {
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VALUE obj; /* Back pointer(VALUE) for Ruby object. */
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size_t MaxPrec; /* Maximum precision size */
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/* This is the actual size of frac[] */
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/*(frac[0] to frac[MaxPrec] are available). */
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size_t Prec; /* Current precision size. */
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/* This indicates how much the */
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/* array frac[] is actually used. */
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SIGNED_VALUE exponent; /* Exponent part. */
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short sign; /* Attributes of the value. */
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/*
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* ==0 : NaN
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* 1 : Positive zero
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* -1 : Negative zero
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* 2 : Positive number
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* -2 : Negative number
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* 3 : Positive infinite number
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* -3 : Negative infinite number
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*/
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short flag; /* Not used in vp_routines,space for user. */
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DECDIG frac[FLEXIBLE_ARRAY_SIZE]; /* Array of fraction part. */
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} Real;
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/*
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* ------------------
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* EXPORTables.
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* ------------------
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*/
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VP_EXPORT Real *VpNewRbClass(size_t mx, char const *str, VALUE klass, bool strict_p, bool raise_exception);
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VP_EXPORT Real *VpCreateRbObject(size_t mx, const char *str, bool raise_exception);
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#define VpBaseFig() BIGDECIMAL_COMPONENT_FIGURES
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#define VpDblFig() BIGDECIMAL_DOUBLE_FIGURES
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#define VpBaseVal() BIGDECIMAL_BASE
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/* Zero,Inf,NaN (isinf(),isnan() used to check) */
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VP_EXPORT double VpGetDoubleNaN(void);
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VP_EXPORT double VpGetDoublePosInf(void);
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VP_EXPORT double VpGetDoubleNegInf(void);
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VP_EXPORT double VpGetDoubleNegZero(void);
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/* These 2 functions added at v1.1.7 */
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VP_EXPORT size_t VpGetPrecLimit(void);
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VP_EXPORT size_t VpSetPrecLimit(size_t n);
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/* Round mode */
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VP_EXPORT int VpIsRoundMode(unsigned short n);
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VP_EXPORT unsigned short VpGetRoundMode(void);
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VP_EXPORT unsigned short VpSetRoundMode(unsigned short n);
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VP_EXPORT int VpException(unsigned short f,const char *str,int always);
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#if 0 /* unused */
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VP_EXPORT int VpIsNegDoubleZero(double v);
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#endif
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VP_EXPORT size_t VpNumOfChars(Real *vp,const char *pszFmt);
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VP_EXPORT size_t VpInit(DECDIG BaseVal);
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VP_EXPORT void *VpMemAlloc(size_t mb);
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VP_EXPORT void *VpMemRealloc(void *ptr, size_t mb);
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VP_EXPORT void VpFree(Real *pv);
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VP_EXPORT Real *VpAlloc(size_t mx, const char *szVal, int strict_p, int exc);
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VP_EXPORT size_t VpAsgn(Real *c, Real *a, int isw);
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VP_EXPORT size_t VpAddSub(Real *c,Real *a,Real *b,int operation);
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VP_EXPORT size_t VpMult(Real *c,Real *a,Real *b);
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VP_EXPORT size_t VpDivd(Real *c,Real *r,Real *a,Real *b);
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VP_EXPORT int VpComp(Real *a,Real *b);
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VP_EXPORT ssize_t VpExponent10(Real *a);
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VP_EXPORT void VpSzMantissa(Real *a,char *psz);
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VP_EXPORT int VpToSpecialString(Real *a,char *psz,int fPlus);
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VP_EXPORT void VpToString(Real *a, char *psz, size_t fFmt, int fPlus);
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VP_EXPORT void VpToFString(Real *a, char *psz, size_t fFmt, int fPlus);
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VP_EXPORT int VpCtoV(Real *a, const char *int_chr, size_t ni, const char *frac, size_t nf, const char *exp_chr, size_t ne);
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VP_EXPORT int VpVtoD(double *d, SIGNED_VALUE *e, Real *m);
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VP_EXPORT void VpDtoV(Real *m,double d);
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#if 0 /* unused */
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VP_EXPORT void VpItoV(Real *m,S_INT ival);
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#endif
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VP_EXPORT int VpSqrt(Real *y,Real *x);
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VP_EXPORT int VpActiveRound(Real *y, Real *x, unsigned short f, ssize_t il);
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VP_EXPORT int VpMidRound(Real *y, unsigned short f, ssize_t nf);
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VP_EXPORT int VpLeftRound(Real *y, unsigned short f, ssize_t nf);
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VP_EXPORT void VpFrac(Real *y, Real *x);
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VP_EXPORT int VpPowerByInt(Real *y, Real *x, SIGNED_VALUE n);
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#define VpPower VpPowerByInt
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/* VP constants */
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VP_EXPORT Real *VpOne(void);
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/*
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* ------------------
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* MACRO definitions.
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* ------------------
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*/
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#define Abs(a) (((a)>= 0)?(a):(-(a)))
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#define Max(a, b) (((a)>(b))?(a):(b))
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#define Min(a, b) (((a)>(b))?(b):(a))
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#define VpMaxPrec(a) ((a)->MaxPrec)
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#define VpPrec(a) ((a)->Prec)
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#define VpGetFlag(a) ((a)->flag)
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/* Sign */
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/* VpGetSign(a) returns 1,-1 if a>0,a<0 respectively */
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#define VpGetSign(a) (((a)->sign>0)?1:(-1))
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/* Change sign of a to a>0,a<0 if s = 1,-1 respectively */
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#define VpChangeSign(a,s) {if((s)>0) (a)->sign=(short)Abs((ssize_t)(a)->sign);else (a)->sign=-(short)Abs((ssize_t)(a)->sign);}
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/* Sets sign of a to a>0,a<0 if s = 1,-1 respectively */
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#define VpSetSign(a,s) {if((s)>0) (a)->sign=(short)VP_SIGN_POSITIVE_FINITE;else (a)->sign=(short)VP_SIGN_NEGATIVE_FINITE;}
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/* 1 */
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#define VpSetOne(a) {(a)->Prec=(a)->exponent=(a)->frac[0]=1;(a)->sign=VP_SIGN_POSITIVE_FINITE;}
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/* ZEROs */
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#define VpIsPosZero(a) ((a)->sign==VP_SIGN_POSITIVE_ZERO)
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#define VpIsNegZero(a) ((a)->sign==VP_SIGN_NEGATIVE_ZERO)
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#define VpIsZero(a) (VpIsPosZero(a) || VpIsNegZero(a))
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#define VpSetPosZero(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_POSITIVE_ZERO)
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#define VpSetNegZero(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NEGATIVE_ZERO)
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#define VpSetZero(a,s) (void)(((s)>0)?VpSetPosZero(a):VpSetNegZero(a))
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/* NaN */
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#define VpIsNaN(a) ((a)->sign==VP_SIGN_NaN)
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#define VpSetNaN(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NaN)
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/* Infinity */
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#define VpIsPosInf(a) ((a)->sign==VP_SIGN_POSITIVE_INFINITE)
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#define VpIsNegInf(a) ((a)->sign==VP_SIGN_NEGATIVE_INFINITE)
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#define VpIsInf(a) (VpIsPosInf(a) || VpIsNegInf(a))
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#define VpIsDef(a) ( !(VpIsNaN(a)||VpIsInf(a)) )
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#define VpSetPosInf(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_POSITIVE_INFINITE)
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#define VpSetNegInf(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NEGATIVE_INFINITE)
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#define VpSetInf(a,s) (void)(((s)>0)?VpSetPosInf(a):VpSetNegInf(a))
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#define VpHasVal(a) (a->frac[0])
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#define VpIsOne(a) ((a->Prec==1)&&(a->frac[0]==1)&&(a->exponent==1))
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#define VpExponent(a) (a->exponent)
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#ifdef BIGDECIMAL_DEBUG
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int VpVarCheck(Real * v);
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#endif /* BIGDECIMAL_DEBUG */
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#if defined(__cplusplus)
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#if 0
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{ /* satisfy cc-mode */
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#endif
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} /* extern "C" { */
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#endif
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#endif /* RUBY_BIG_DECIMAL_H */
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