Ruby  2.0.0p645(2015-04-13revision50299)
bigdecimal.h
Go to the documentation of this file.
1 /*
2  *
3  * Ruby BigDecimal(Variable decimal precision) extension library.
4  *
5  * Copyright(C) 2002 by Shigeo Kobayashi(shigeo@tinyforest.gr.jp)
6  *
7  * You may distribute under the terms of either the GNU General Public
8  * License or the Artistic License, as specified in the README file
9  * of this BigDecimal distribution.
10  *
11  * NOTES:
12  * 2003-03-28 V1.0 checked in.
13  *
14  */
15 
16 #ifndef RUBY_BIG_DECIMAL_H
17 #define RUBY_BIG_DECIMAL_H 1
18 
19 #include "ruby/ruby.h"
20 #include <float.h>
21 
22 #if defined(__cplusplus)
23 extern "C" {
24 #if 0
25 } /* satisfy cc-mode */
26 #endif
27 #endif
28 
29 #ifndef HAVE_LABS
30 static inline long
31 labs(long const x)
32 {
33  if (x < 0) return -x;
34  return x;
35 }
36 #endif
37 
38 #ifndef HAVE_LLABS
39 static inline LONG_LONG
40 llabs(LONG_LONG const x)
41 {
42  if (x < 0) return -x;
43  return x;
44 }
45 #endif
46 
47 #ifdef vabs
48 # undef vabs
49 #endif
50 #if SIZEOF_VALUE <= SIZEOF_INT
51 # define vabs abs
52 #elif SIZEOF_VALUE <= SIZEOF_LONG
53 # define vabs labs
54 #elif SIZEOF_VALUE <= SIZEOF_LONG_LONG
55 # define vabs llabs
56 #endif
57 
58 extern VALUE rb_cBigDecimal;
59 
60 #if 0 || SIZEOF_BDIGITS >= 16
61 # define RMPD_COMPONENT_FIGURES 38
62 # define RMPD_BASE ((BDIGIT)100000000000000000000000000000000000000U)
63 #elif SIZEOF_BDIGITS >= 8
64 # define RMPD_COMPONENT_FIGURES 19
65 # define RMPD_BASE ((BDIGIT)10000000000000000000U)
66 #elif SIZEOF_BDIGITS >= 4
67 # define RMPD_COMPONENT_FIGURES 9
68 # define RMPD_BASE ((BDIGIT)1000000000U)
69 #elif SIZEOF_BDIGITS >= 2
70 # define RMPD_COMPONENT_FIGURES 4
71 # define RMPD_BASE ((BDIGIT)10000U)
72 #else
73 # define RMPD_COMPONENT_FIGURES 2
74 # define RMPD_BASE ((BDIGIT)100U)
75 #endif
76 
77 
78 /*
79  * NaN & Infinity
80  */
81 #define SZ_NaN "NaN"
82 #define SZ_INF "Infinity"
83 #define SZ_PINF "+Infinity"
84 #define SZ_NINF "-Infinity"
85 
86 /*
87  * #define VP_EXPORT other than static to let VP_ routines
88  * be called from outside of this module.
89  */
90 #define VP_EXPORT static
91 
92 /* Exception codes */
93 #define VP_EXCEPTION_ALL ((unsigned short)0x00FF)
94 #define VP_EXCEPTION_INFINITY ((unsigned short)0x0001)
95 #define VP_EXCEPTION_NaN ((unsigned short)0x0002)
96 #define VP_EXCEPTION_UNDERFLOW ((unsigned short)0x0004)
97 #define VP_EXCEPTION_OVERFLOW ((unsigned short)0x0001) /* 0x0008) */
98 #define VP_EXCEPTION_ZERODIVIDE ((unsigned short)0x0010)
99 
100 /* Following 2 exceptions cann't controlled by user */
101 #define VP_EXCEPTION_OP ((unsigned short)0x0020)
102 #define VP_EXCEPTION_MEMORY ((unsigned short)0x0040)
103 
104 #define RMPD_EXCEPTION_MODE_DEFAULT 0U
105 
106 /* Computation mode */
107 #define VP_ROUND_MODE ((unsigned short)0x0100)
108 #define VP_ROUND_UP 1
109 #define VP_ROUND_DOWN 2
110 #define VP_ROUND_HALF_UP 3
111 #define VP_ROUND_HALF_DOWN 4
112 #define VP_ROUND_CEIL 5
113 #define VP_ROUND_FLOOR 6
114 #define VP_ROUND_HALF_EVEN 7
115 
116 #define RMPD_ROUNDING_MODE_DEFAULT VP_ROUND_HALF_UP
117 
118 #define VP_SIGN_NaN 0 /* NaN */
119 #define VP_SIGN_POSITIVE_ZERO 1 /* Positive zero */
120 #define VP_SIGN_NEGATIVE_ZERO -1 /* Negative zero */
121 #define VP_SIGN_POSITIVE_FINITE 2 /* Positive finite number */
122 #define VP_SIGN_NEGATIVE_FINITE -2 /* Negative finite number */
123 #define VP_SIGN_POSITIVE_INFINITE 3 /* Positive infinite number */
124 #define VP_SIGN_NEGATIVE_INFINITE -3 /* Negative infinite number */
125 
126 #ifdef __GNUC__
127 #define FLEXIBLE_ARRAY_SIZE 0
128 #else
129 #define FLEXIBLE_ARRAY_SIZE 1
130 #endif
131 
132 /*
133  * VP representation
134  * r = 0.xxxxxxxxx *BASE**exponent
135  */
136 typedef struct {
137  VALUE obj; /* Back pointer(VALUE) for Ruby object. */
138  size_t MaxPrec; /* Maximum precision size */
139  /* This is the actual size of pfrac[] */
140  /*(frac[0] to frac[MaxPrec] are available). */
141  size_t Prec; /* Current precision size. */
142  /* This indicates how much the. */
143  /* the array frac[] is actually used. */
144  SIGNED_VALUE exponent; /* Exponent part. */
145  short sign; /* Attributes of the value. */
146  /*
147  * ==0 : NaN
148  * 1 : Positive zero
149  * -1 : Negative zero
150  * 2 : Positive number
151  * -2 : Negative number
152  * 3 : Positive infinite number
153  * -3 : Negative infinite number
154  */
155  short flag; /* Not used in vp_routines,space for user. */
156  BDIGIT frac[FLEXIBLE_ARRAY_SIZE]; /* Array of fraction part. */
157 } Real;
158 
159 /*
160  * ------------------
161  * EXPORTables.
162  * ------------------
163  */
164 
165 VP_EXPORT Real *
166 VpNewRbClass(size_t mx, char const *str, VALUE klass);
167 
168 VP_EXPORT Real *VpCreateRbObject(size_t mx,const char *str);
169 
170 static inline BDIGIT
171 rmpd_base_value(void) { return RMPD_BASE; }
172 static inline size_t
174 static inline size_t
175 rmpd_double_figures(void) { return 1+DBL_DIG; }
176 
177 #define VpBaseFig() rmpd_component_figures()
178 #define VpDblFig() rmpd_double_figures()
179 #define VpBaseVal() rmpd_base_value()
180 
181 /* Zero,Inf,NaN (isinf(),isnan() used to check) */
182 VP_EXPORT double VpGetDoubleNaN(void);
183 VP_EXPORT double VpGetDoublePosInf(void);
184 VP_EXPORT double VpGetDoubleNegInf(void);
185 VP_EXPORT double VpGetDoubleNegZero(void);
186 
187 /* These 2 functions added at v1.1.7 */
188 VP_EXPORT size_t VpGetPrecLimit(void);
189 VP_EXPORT size_t VpSetPrecLimit(size_t n);
190 
191 /* Round mode */
192 VP_EXPORT int VpIsRoundMode(unsigned short n);
193 VP_EXPORT unsigned short VpGetRoundMode(void);
194 VP_EXPORT unsigned short VpSetRoundMode(unsigned short n);
195 
196 VP_EXPORT int VpException(unsigned short f,const char *str,int always);
197 #if 0 /* unused */
198 VP_EXPORT int VpIsNegDoubleZero(double v);
199 #endif
200 VP_EXPORT size_t VpNumOfChars(Real *vp,const char *pszFmt);
201 VP_EXPORT size_t VpInit(BDIGIT BaseVal);
202 VP_EXPORT void *VpMemAlloc(size_t mb);
203 VP_EXPORT void *VpMemRealloc(void *ptr, size_t mb);
204 VP_EXPORT void VpFree(Real *pv);
205 VP_EXPORT Real *VpAlloc(size_t mx, const char *szVal);
206 VP_EXPORT size_t VpAsgn(Real *c, Real *a, int isw);
207 VP_EXPORT size_t VpAddSub(Real *c,Real *a,Real *b,int operation);
208 VP_EXPORT size_t VpMult(Real *c,Real *a,Real *b);
209 VP_EXPORT size_t VpDivd(Real *c,Real *r,Real *a,Real *b);
210 VP_EXPORT int VpComp(Real *a,Real *b);
211 VP_EXPORT ssize_t VpExponent10(Real *a);
212 VP_EXPORT void VpSzMantissa(Real *a,char *psz);
213 VP_EXPORT int VpToSpecialString(Real *a,char *psz,int fPlus);
214 VP_EXPORT void VpToString(Real *a, char *psz, size_t fFmt, int fPlus);
215 VP_EXPORT void VpToFString(Real *a, char *psz, size_t fFmt, int fPlus);
216 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);
217 VP_EXPORT int VpVtoD(double *d, SIGNED_VALUE *e, Real *m);
218 VP_EXPORT void VpDtoV(Real *m,double d);
219 #if 0 /* unused */
220 VP_EXPORT void VpItoV(Real *m,S_INT ival);
221 #endif
222 VP_EXPORT int VpSqrt(Real *y,Real *x);
223 VP_EXPORT int VpActiveRound(Real *y, Real *x, unsigned short f, ssize_t il);
224 VP_EXPORT int VpMidRound(Real *y, unsigned short f, ssize_t nf);
225 VP_EXPORT int VpLeftRound(Real *y, unsigned short f, ssize_t nf);
226 VP_EXPORT void VpFrac(Real *y, Real *x);
227 VP_EXPORT int VpPower(Real *y, Real *x, SIGNED_VALUE n);
228 
229 /* VP constants */
230 VP_EXPORT Real *VpOne(void);
231 
232 /*
233  * ------------------
234  * MACRO definitions.
235  * ------------------
236  */
237 #define Abs(a) (((a)>= 0)?(a):(-(a)))
238 #define Max(a, b) (((a)>(b))?(a):(b))
239 #define Min(a, b) (((a)>(b))?(b):(a))
240 
241 #define VpMaxPrec(a) ((a)->MaxPrec)
242 #define VpPrec(a) ((a)->Prec)
243 #define VpGetFlag(a) ((a)->flag)
244 
245 /* Sign */
246 
247 /* VpGetSign(a) returns 1,-1 if a>0,a<0 respectively */
248 #define VpGetSign(a) (((a)->sign>0)?1:(-1))
249 /* Change sign of a to a>0,a<0 if s = 1,-1 respectively */
250 #define VpChangeSign(a,s) {if((s)>0) (a)->sign=(short)Abs((ssize_t)(a)->sign);else (a)->sign=-(short)Abs((ssize_t)(a)->sign);}
251 /* Sets sign of a to a>0,a<0 if s = 1,-1 respectively */
252 #define VpSetSign(a,s) {if((s)>0) (a)->sign=(short)VP_SIGN_POSITIVE_FINITE;else (a)->sign=(short)VP_SIGN_NEGATIVE_FINITE;}
253 
254 /* 1 */
255 #define VpSetOne(a) {(a)->Prec=(a)->exponent=(a)->frac[0]=1;(a)->sign=VP_SIGN_POSITIVE_FINITE;}
256 
257 /* ZEROs */
258 #define VpIsPosZero(a) ((a)->sign==VP_SIGN_POSITIVE_ZERO)
259 #define VpIsNegZero(a) ((a)->sign==VP_SIGN_NEGATIVE_ZERO)
260 #define VpIsZero(a) (VpIsPosZero(a) || VpIsNegZero(a))
261 #define VpSetPosZero(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_POSITIVE_ZERO)
262 #define VpSetNegZero(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NEGATIVE_ZERO)
263 #define VpSetZero(a,s) ( ((s)>0)?VpSetPosZero(a):VpSetNegZero(a) )
264 
265 /* NaN */
266 #define VpIsNaN(a) ((a)->sign==VP_SIGN_NaN)
267 #define VpSetNaN(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NaN)
268 
269 /* Infinity */
270 #define VpIsPosInf(a) ((a)->sign==VP_SIGN_POSITIVE_INFINITE)
271 #define VpIsNegInf(a) ((a)->sign==VP_SIGN_NEGATIVE_INFINITE)
272 #define VpIsInf(a) (VpIsPosInf(a) || VpIsNegInf(a))
273 #define VpIsDef(a) ( !(VpIsNaN(a)||VpIsInf(a)) )
274 #define VpSetPosInf(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_POSITIVE_INFINITE)
275 #define VpSetNegInf(a) ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NEGATIVE_INFINITE)
276 #define VpSetInf(a,s) ( ((s)>0)?VpSetPosInf(a):VpSetNegInf(a) )
277 #define VpHasVal(a) (a->frac[0])
278 #define VpIsOne(a) ((a->Prec==1)&&(a->frac[0]==1)&&(a->exponent==1))
279 #define VpExponent(a) (a->exponent)
280 #ifdef BIGDECIMAL_DEBUG
281 int VpVarCheck(Real * v);
282 VP_EXPORT int VPrint(FILE *fp,const char *cntl_chr,Real *a);
283 #endif /* BIGDECIMAL_DEBUG */
284 
285 #if defined(__cplusplus)
286 #if 0
287 { /* satisfy cc-mode */
288 #endif
289 } /* extern "C" { */
290 #endif
291 #endif /* RUBY_BIG_DECIMAL_H */
VP_EXPORT void * VpMemRealloc(void *ptr, size_t mb)
Definition: bigdecimal.c:3303
VP_EXPORT int VpActiveRound(Real *y, Real *x, unsigned short f, ssize_t il)
Definition: bigdecimal.c:5840
VP_EXPORT ssize_t VpExponent10(Real *a)
Definition: bigdecimal.c:5006
SIGNED_VALUE exponent
Definition: bigdecimal.h:144
VP_EXPORT double VpGetDoubleNaN(void)
Definition: bigdecimal.c:3494
#define DBL_DIG
Definition: numeric.c:67
VALUE obj
Definition: bigdecimal.h:137
size_t Prec
Definition: bigdecimal.h:141
static long labs(long const x)
Definition: bigdecimal.h:31
VP_EXPORT size_t VpGetPrecLimit(void)
Definition: bigdecimal.c:3378
VP_EXPORT size_t VpDivd(Real *c, Real *r, Real *a, Real *b)
Definition: bigdecimal.c:4543
VP_EXPORT size_t VpMult(Real *c, Real *a, Real *b)
Definition: bigdecimal.c:4418
VP_EXPORT int VpComp(Real *a, Real *b)
Definition: bigdecimal.c:4792
#define BDIGIT
Definition: defines.h:93
VP_EXPORT int VpVtoD(double *d, SIGNED_VALUE *e, Real *m)
Definition: bigdecimal.c:5362
static LONG_LONG llabs(LONG_LONG const x)
Definition: bigdecimal.h:40
VP_EXPORT void VpFrac(Real *y, Real *x)
Definition: bigdecimal.c:5934
static size_t rmpd_component_figures(void)
Definition: bigdecimal.h:173
VP_EXPORT size_t VpAddSub(Real *c, Real *a, Real *b, int operation)
Definition: bigdecimal.c:3992
VP_EXPORT void VpToFString(Real *a, char *psz, size_t fFmt, int fPlus)
Definition: bigdecimal.c:5148
VP_EXPORT int VpMidRound(Real *y, unsigned short f, ssize_t nf)
Definition: bigdecimal.c:5665
VP_EXPORT Real * VpNewRbClass(size_t mx, char const *str, VALUE klass)
Definition: bigdecimal.c:573
#define RMPD_COMPONENT_FIGURES
Definition: bigdecimal.h:73
VP_EXPORT void * VpMemAlloc(size_t mb)
Definition: bigdecimal.c:3289
#define ne(x, y)
Definition: time.c:66
VP_EXPORT void VpToString(Real *a, char *psz, size_t fFmt, int fPlus)
Definition: bigdecimal.c:5102
#define VP_EXPORT
Definition: bigdecimal.h:90
#define RMPD_BASE
Definition: bigdecimal.h:74
VP_EXPORT size_t VpNumOfChars(Real *vp, const char *pszFmt)
Definition: bigdecimal.c:3672
VALUE rb_cBigDecimal
Definition: bigdecimal.c:41
VP_EXPORT void VpFree(Real *pv)
Definition: bigdecimal.c:3313
VP_EXPORT Real * VpCreateRbObject(size_t mx, const char *str)
Definition: bigdecimal.c:581
VP_EXPORT double VpGetDoubleNegZero(void)
Definition: bigdecimal.c:3518
VP_EXPORT int VpIsRoundMode(unsigned short n)
Definition: bigdecimal.c:3429
static VALUE int_chr(int argc, VALUE *argv, VALUE num)
Definition: numeric.c:2478
short flag
Definition: bigdecimal.h:155
VP_EXPORT int VpSqrt(Real *y, Real *x)
Definition: bigdecimal.c:5556
VP_EXPORT void VpDtoV(Real *m, double d)
Definition: bigdecimal.c:5426
VP_EXPORT int VpToSpecialString(Real *a, char *psz, int fPlus)
Definition: bigdecimal.c:5069
unsigned long VALUE
Definition: ruby.h:104
static BDIGIT rmpd_base_value(void)
Definition: bigdecimal.h:171
VP_EXPORT double VpGetDoubleNegInf(void)
Definition: bigdecimal.c:3510
VP_EXPORT size_t VpSetPrecLimit(size_t n)
Definition: bigdecimal.c:3394
VP_EXPORT size_t VpAsgn(Real *c, Real *a, int isw)
Definition: bigdecimal.c:3950
short sign
Definition: bigdecimal.h:145
static size_t rmpd_double_figures(void)
Definition: bigdecimal.h:175
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)
Definition: bigdecimal.c:5213
#define f
VP_EXPORT void VpSzMantissa(Real *a, char *psz)
Definition: bigdecimal.c:5023
VP_EXPORT int VpPower(Real *y, Real *x, SIGNED_VALUE n)
Definition: bigdecimal.c:5982
VP_EXPORT unsigned short VpGetRoundMode(void)
Definition: bigdecimal.c:3413
v
Definition: win32ole.c:798
VP_EXPORT int VpLeftRound(Real *y, unsigned short f, ssize_t nf)
Definition: bigdecimal.c:5825
VP_EXPORT Real * VpAlloc(size_t mx, const char *szVal)
Definition: bigdecimal.c:3797
#define FLEXIBLE_ARRAY_SIZE
Definition: bigdecimal.h:129
VP_EXPORT size_t VpInit(BDIGIT BaseVal)
Definition: bigdecimal.c:3716
VP_EXPORT double VpGetDoublePosInf(void)
Definition: bigdecimal.c:3502
VP_EXPORT int VpException(unsigned short f, const char *str, int always)
Definition: bigdecimal.c:3535
VP_EXPORT Real * VpOne(void)
Definition: bigdecimal.c:3747
VP_EXPORT unsigned short VpSetRoundMode(unsigned short n)
Definition: bigdecimal.c:3447
size_t MaxPrec
Definition: bigdecimal.h:138
#define SIGNED_VALUE
Definition: ruby.h:106