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authorshyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-06-13 03:07:43 +0000
committershyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-06-13 03:07:43 +0000
commit5ecf4d8af325771bb022e922a38b15e7e4dfb94a (patch)
tree6ab3f2bcc66426794605db57f45eafee7168c7c0 /ext
parent679ae60db2127fcc4fd438d7bf169d06ea7c75b4 (diff)
merge revision(s) 15415:
* ext/bigdecimal/bigdecimal.c (BigDecimal_to_f): use strtod() for more precision. [ruby-talk:290296] * ext/bigdecimal/bigdecimal.c (BASE_FIG): made constant. * ext/bigdecimal/extconf.rb: ditto. [ruby-dev:33658] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@17131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext')
-rw-r--r--ext/bigdecimal/bigdecimal.c59
-rw-r--r--ext/bigdecimal/extconf.rb10
2 files changed, 42 insertions, 27 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index a4b769e..636c090 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -586,19 +586,22 @@ BigDecimal_to_f(VALUE self)
{
ENTER(1);
Real *p;
- double d, d2;
+ double d;
S_LONG e;
+ char *buf;
GUARD_OBJ(p,GetVpValue(self,1));
if(VpVtoD(&d, &e, p)!=1) return rb_float_new(d);
+ buf = ALLOCA_N(char,(unsigned int)VpNumOfChars(p,"E"));
+ VpToString(p, buf, 0, 0);
errno = 0;
- d2 = pow(10.0,(double)e);
- if((errno == ERANGE && e>0) || (d2>1.0 && (fabs(d) > (DBL_MAX / d2)))) {
+ d = strtod(buf, 0);
+ if(errno == ERANGE) {
VpException(VP_EXCEPTION_OVERFLOW,"BigDecimal to Float conversion",0);
if(d>0.0) return rb_float_new(DBL_MAX);
else return rb_float_new(-DBL_MAX);
}
- return rb_float_new(d*d2);
+ return rb_float_new(d);
}
/* The coerce method provides support for Ruby type coercion. It is not
@@ -1051,7 +1054,7 @@ static VALUE
BigDecimal_remainder(VALUE self, VALUE r) /* remainder */
{
VALUE f;
- Real *d,*rv;
+ Real *d,*rv=0;
f = BigDecimal_divremain(self,r,&d,&rv);
if(f!=(VALUE)0) return f;
return ToValue(rv);
@@ -1505,7 +1508,7 @@ BigDecimal_to_s(int argc, VALUE *argv, VALUE self)
} else if(*psz=='+') {
fPlus = 2; psz++;
}
- while(ch=*psz++) {
+ while((ch=*psz++)!=0) {
if(ISSPACE(ch)) continue;
if(!ISDIGIT(ch)) {
if(ch=='F' || ch=='f') fmt = 1; /* F format */
@@ -1962,17 +1965,27 @@ static int gfCheckVal = 1; /* Value checking flag in VpNmlz() */
static U_LONG gnPrecLimit = 0; /* Global upper limit of the precision newly allocated */
static U_LONG gfRoundMode = VP_ROUND_HALF_UP; /* Mode for general rounding operation */
+#ifndef BASE_FIG
static U_LONG BASE_FIG = 4; /* =log10(BASE) */
static U_LONG BASE = 10000L; /* Base value(value must be 10**BASE_FIG) */
/* The value of BASE**2 + BASE must be represented */
/* within one U_LONG. */
static U_LONG HALF_BASE = 5000L;/* =BASE/2 */
-static S_LONG DBLE_FIG = 8; /* figure of double */
static U_LONG BASE1 = 1000L; /* =BASE/10 */
+#else
+#ifndef BASE
+#error BASE_FIG is defined but BASE is not
+#endif
+#define HALF_BASE (BASE/2)
+#define BASE1 (BASE/10)
+#endif
+#ifndef DBLE_FIG
+#define DBLE_FIG (DBL_DIG+1) /* figure of double */
+#endif
static Real *VpConstOne; /* constant 1.0 */
static Real *VpPt5; /* constant 0.5 */
-static U_LONG maxnr = 100; /* Maximum iterations for calcurating sqrt. */
+#define maxnr 100UL /* Maximum iterations for calcurating sqrt. */
/* used in VpSqrt() */
/* ETC */
@@ -2089,8 +2102,8 @@ VpSetRoundMode(unsigned long n)
* (to let the compiler know they may be changed in outside
* (... but not actually..)).
*/
-volatile double gZero_ABCED9B1_CE73__00400511F31D = 0.0;
-volatile double gOne_ABCED9B4_CE73__00400511F31D = 1.0;
+volatile const double gZero_ABCED9B1_CE73__00400511F31D = 0.0;
+volatile const double gOne_ABCED9B4_CE73__00400511F31D = 1.0;
static double
Zero(void)
{
@@ -2362,16 +2375,15 @@ VpNumOfChars(Real *vp,const char *pszFmt)
VP_EXPORT U_LONG
VpInit(U_LONG BaseVal)
{
- U_LONG w;
- double v;
-
/* Setup +/- Inf NaN -0 */
VpGetDoubleNaN();
VpGetDoublePosInf();
VpGetDoubleNegInf();
VpGetDoubleNegZero();
+#ifndef BASE_FIG
if(BaseVal <= 0) {
+ U_LONG w;
/* Base <= 0, then determine Base by calcuration. */
BASE = 1;
while(
@@ -2388,6 +2400,8 @@ VpInit(U_LONG BaseVal)
BASE1 = BASE / 10;
BASE_FIG = 0;
while(BaseVal /= 10) ++BASE_FIG;
+#endif
+
/* Allocates Vp constants. */
VpConstOne = VpAlloc((U_LONG)1, "1");
VpPt5 = VpAlloc((U_LONG)1, ".5");
@@ -2396,15 +2410,6 @@ VpInit(U_LONG BaseVal)
gnAlloc = 0;
#endif /* _DEBUG */
- /* Determine # of digits available in one 'double'. */
-
- v = 1.0;
- DBLE_FIG = 0;
- while(v + 1.0 > 1.0) {
- ++DBLE_FIG;
- v /= 10;
- }
-
#ifdef _DEBUG
if(gfDebug) {
printf("VpInit: BaseVal = %lu\n", BaseVal);
@@ -2507,7 +2512,7 @@ VpAlloc(U_LONG mx, const char *szVal)
psz = ALLOCA_N(char,strlen(szVal)+1);
i = 0;
ipn = 0;
- while(psz[i]=szVal[ipn]) {
+ while((psz[i]=szVal[ipn])!=0) {
if(ISDIGIT(psz[i])) ++ni;
if(psz[i]=='_') {
if(ni>0) {ipn++;continue;}
@@ -2550,7 +2555,7 @@ VpAlloc(U_LONG mx, const char *szVal)
else if(szVal[i] == '+') ++i;
/* Skip digits */
ni = 0; /* digits in mantissa */
- while(v = szVal[i]) {
+ while((v = szVal[i]) != 0) {
if(!ISDIGIT(v)) break;
++i;
++ni;
@@ -2564,7 +2569,7 @@ VpAlloc(U_LONG mx, const char *szVal)
if(szVal[i] == '.') { /* xxx. */
++i;
ipf = i;
- while(v = szVal[i]) { /* get fraction part. */
+ while((v = szVal[i]) != 0) { /* get fraction part. */
if(!ISDIGIT(v)) break;
++i;
++nf;
@@ -2582,7 +2587,7 @@ VpAlloc(U_LONG mx, const char *szVal)
ipe = i;
v = szVal[i];
if((v == '-') ||(v == '+')) ++i;
- while(v=szVal[i]) {
+ while((v=szVal[i])!=0) {
if(!ISDIGIT(v)) break;
++i;
++ne;
@@ -4434,7 +4439,7 @@ VpLeftRound(Real *y, int f, int nf)
if(!VpHasVal(y)) return 0; /* Unable to round */
v = y->frac[0];
nf -= VpExponent(y)*BASE_FIG;
- while(v=v/10) nf--;
+ while((v /= 10) != 0) nf--;
nf += (BASE_FIG-1);
return VpMidRound(y,f,nf);
}
diff --git a/ext/bigdecimal/extconf.rb b/ext/bigdecimal/extconf.rb
index a68a656..864aaad 100644
--- a/ext/bigdecimal/extconf.rb
+++ b/ext/bigdecimal/extconf.rb
@@ -1,2 +1,12 @@
require 'mkmf'
+
+base_fig = 0
+src = ("(BASE > 0) && "
+ "(BASE * (BASE+1)) > BASE && "
+ "(BASE * (BASE+1)) / BASE == (BASE+1)")
+while try_static_assert(src, nil, "-DBASE=10#{'0'*base_fig}UL")
+ base_fig += 1
+end
+$defs << "-DBASE=1#{'0'*base_fig}UL" << "-DBASE_FIG=#{base_fig}"
+
create_makefile('bigdecimal')