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object.c: raise on long invalid float string

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* object.c (rb_cstr_to_dbl_raise): check long invalid float
  string more precisely when truncating insignificant part.
  [ruby-core:86800] [Bug #14729]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63334 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-05-04 06:12:12 +00:00
parent 6dd4657fc2
commit 955849c126
2 changed files with 31 additions and 1 deletions
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26
object.c
View file

@ -3273,7 +3273,13 @@ rb_cstr_to_dbl_raise(const char *p, int badcheck, int raise, int *error)
char *const init_e = buf + DBL_DIG * 4;
char *e = init_e;
char prev = 0;
int dot_seen = FALSE;
switch (*p) {case '+': case '-': prev = *n++ = *p++;}
if (*p == '0') {
prev = *n++ = '0';
while (*++p == '0');
}
while (p < end && n < e) prev = *n++ = *p++;
while (*p) {
if (*p == '_') {
@ -3284,8 +3290,26 @@ rb_cstr_to_dbl_raise(const char *p, int badcheck, int raise, int *error)
}
}
prev = *p++;
if (e == init_e && (*p == 'e' || *p == 'E')) {
if (e == init_e && (prev == 'e' || prev == 'E' || prev == 'p' || prev == 'P')) {
e = buf + sizeof(buf) - 1;
*n++ = prev;
switch (*p) {case '+': case '-': prev = *n++ = *p++;}
if (*p == '0') {
prev = *n++ = '0';
while (*++p == '0');
}
continue;
}
else if (ISSPACE(prev)) {
while (ISSPACE(*p)) ++p;
if (*p) {
if (badcheck) goto bad;
break;
}
}
else if (prev == '.' ? dot_seen++ : !ISDIGIT(prev)) {
if (badcheck) goto bad;
break;
}
if (n < e) *n++ = prev;
}

6
test/ruby/test_float.rb
View file

@ -165,6 +165,12 @@ class TestFloat < Test::Unit::TestCase
end
assert_equal(1.0e10, Float("1.0_"+"00000"*Float::DIG+"e10"))
z = "0" * (Float::DIG * 4 + 10)
all_assertions_foreach("long invalid string", "1.0", "1.0e", "1.0e-", "1.0e+") do |n|
assert_raise(ArgumentError, n += z + "A") {Float(n)}
assert_raise(ArgumentError, n += z + ".0") {Float(n)}
end
end
def test_divmod