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[ruby/strscan] Add missing shrunk check in integer_at

Browse Source 
(https://github.com/ruby/strscan/pull/212)

https://github.com/ruby/strscan/commit/3032e38cb5
This commit is contained in:
Sutou Kouhei 2026-07-27 15:47:08 +09:00 committed by git
parent e42fb9492e
commit 28f1bbc0bc
2 changed files with 25 additions and 0 deletions
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5
ext/strscan/strscan.c
View File

@ -1862,8 +1862,13 @@ strscan_integer_at(int argc, VALUE *argv, VALUE self)
return Qnil;
beg = adjust_register_position(p, p->regs.beg[i]);
if (beg > S_LEN(p))
return Qnil;
end = adjust_register_position(p, p->regs.end[i]);
end = minl(end, S_LEN(p));
len = end - beg;
if (len == 0)
return Qnil;
ptr = S_PBEG(p) + beg;
#ifdef HAVE_RB_INT_PARSE_CSTR
{

20
test/strscan/test_stringscanner.rb
View File

@ -578,6 +578,26 @@ module StringScannerTests
assert_integer_at(s, 0, 0) # 0xaf
end
def test_integer_at_shrunk
omit("not supported on TruffleRuby") if RUBY_ENGINE == "truffleruby"
s = create_string_scanner(+"before 29 after")
s.skip_until(" ")
assert_equal("29", s.scan(/\d+/))
s.string.replace("before ")
assert_nil(s.integer_at(0))
end
def test_integer_at_shrunk_partial
omit("not supported on TruffleRuby") if RUBY_ENGINE == "truffleruby"
s = create_string_scanner(+"before 29 after")
s.skip_until(" ")
assert_equal("29", s.scan(/\d+/))
s.string.replace("before 2")
assert_integer_at(s, 2)
end
def test_pre_match
s = create_string_scanner('a b c d e')
s.scan(/\w/)