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merge revision(s) 58796: [Backport #13545]

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Merge latest dtoa.c [Bug #13545]

	Apply some part of http://www.netlib.org/fp/dtoa.c with my eyes...

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@59298 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nagachika 2017-07-09 19:51:43 +00:00
parent 5528c18ded
commit c54593eddb
3 changed files with 10 additions and 6 deletions
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2
test/ruby/test_float.rb
View file

@ -16,6 +16,8 @@ class TestFloat < Test::Unit::TestCase
assert_in_delta(13.4 % 1, 0.4, 0.0001)
assert_equal(36893488147419111424,
36893488147419107329.0.to_i)
assert_equal(1185151044158398820374743613440,
1.1851510441583988e+30.to_i)
end
def nan_test(x,y)

12
util.c
View file

@ -2109,7 +2109,7 @@ break2:
for (nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
if (nd < 9)
y = 10*y + c - '0';
else if (nd < 16)
else if (nd < DBL_DIG + 2)
z = 10*z + c - '0';
nd0 = nd;
#ifdef USE_LOCALE
@ -2149,17 +2149,19 @@ break2:
for (; c >= '0' && c <= '9'; c = *++s) {
have_dig:
nz++;
if (nd > DBL_DIG * 4) continue;
if (nd > DBL_DIG * 4) {
continue;
}
if (c -= '0') {
nf += nz;
for (i = 1; i < nz; i++)
if (nd++ < 9)
y *= 10;
else if (nd <= DBL_DIG + 1)
else if (nd <= DBL_DIG + 2)
z *= 10;
if (nd++ < 9)
y = 10*y + c;
else if (nd <= DBL_DIG + 1)
else if (nd <= DBL_DIG + 2)
z = 10*z + c;
nz = 0;
}
@ -2247,7 +2249,7 @@ ret0:
if (!nd0)
nd0 = nd;
k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
k = nd < DBL_DIG + 2 ? nd : DBL_DIG + 2;
dval(rv) = y;
if (k > 9) {
#ifdef SET_INEXACT

2
version.h
View file

@ -1,6 +1,6 @@
#define RUBY_VERSION "2.4.2"
#define RUBY_RELEASE_DATE "2017-07-10"
#define RUBY_PATCHLEVEL 138
#define RUBY_PATCHLEVEL 139
#define RUBY_RELEASE_YEAR 2017
#define RUBY_RELEASE_MONTH 7