Actions
Bug #13021
closed`Zlib.gunzip` modifies argument String
Description
% irb -r irb/completion --simple-prompt
>> RUBY_DESCRIPTION
=> "ruby 2.4.0dev (2016-12-10 trunk 57036) [x86_64-linux]"
>> require 'zlib'
=> true
>> gz=Zlib.gzip('test')
=> "\x1F\x8B\b\x00\xBF`KX\x00\x03+I-.\x01\x00\f~\x7F\xD8\x04\x00\x00\x00"
>> Zlib.gunzip(gz)
=> "test"
>> gz
=> "+I-.\x01\x00\f~\x7F\xD8\x04\x00\x00\x00"
Updated by znz (Kazuhiro NISHIYAMA) almost 8 years ago
- Related to Feature #13020: Zlib.gzip and Zlib.gunzip added
Updated by nobu (Nobuyoshi Nakada) almost 8 years ago
diff --git i/ext/zlib/zlib.c w/ext/zlib/zlib.c
index 78860132df..0ce14198cc 100644
--- i/ext/zlib/zlib.c
+++ w/ext/zlib/zlib.c
@@ -879,9 +879,8 @@ zstream_discard_input(struct zstream *z, long len)
z->input = Qnil;
}
else {
- memmove(RSTRING_PTR(z->input), RSTRING_PTR(z->input) + len,
- RSTRING_LEN(z->input) - len);
- rb_str_resize(z->input, RSTRING_LEN(z->input) - len);
+ z->input = rb_str_substr(z->input, len,
+ RSTRING_LEN(z->input) - len);
}
}
@@ -2406,9 +2405,7 @@ gzfile_read_raw_ensure(struct gzfile *gz, long size)
VALUE str;
if (gz->io == Qundef) { /* Zlib.gunzip */
- if (NIL_P(gz->z.input))
- rb_bug("unexpected condition: both gz->io and gz->z.input are nil");
- if (RSTRING_LEN(gz->z.input) < size)
+ if (NIL_P(gz->z.input) || RSTRING_LEN(gz->z.input) < size)
rb_raise(cGzError, "unexpected end of string");
}
while (NIL_P(gz->z.input) || RSTRING_LEN(gz->z.input) < size) {
diff --git i/test/zlib/test_zlib.rb w/test/zlib/test_zlib.rb
index 60fb84dd0d..7f9ec981fd 100644
--- i/test/zlib/test_zlib.rb
+++ w/test/zlib/test_zlib.rb
@@ -1128,25 +1128,25 @@
end
def test_gzip
- actual = Zlib.gzip("foo")
+ actual = Zlib.gzip("foo".freeze)
actual[4, 4] = "\x00\x00\x00\x00" # replace mtime
actual[9] = "\xff" # replace OS
expected = %w[1f8b08000000000000ff4bcbcf07002165738c03000000].pack("H*")
assert_equal expected, actual
- actual = Zlib.gzip("foo", 0)
+ actual = Zlib.gzip("foo".freeze, 0)
actual[4, 4] = "\x00\x00\x00\x00" # replace mtime
actual[9] = "\xff" # replace OS
expected = %w[1f8b08000000000000ff010300fcff666f6f2165738c03000000].pack("H*")
assert_equal expected, actual
- actual = Zlib.gzip("foo", 9)
+ actual = Zlib.gzip("foo".freeze, 9)
actual[4, 4] = "\x00\x00\x00\x00" # replace mtime
actual[9] = "\xff" # replace OS
expected = %w[1f8b08000000000002ff4bcbcf07002165738c03000000].pack("H*")
assert_equal expected, actual
- actual = Zlib.gzip("foo", 9, Zlib::FILTERED)
+ actual = Zlib.gzip("foo".freeze, 9, Zlib::FILTERED)
actual[4, 4] = "\x00\x00\x00\x00" # replace mtime
actual[9] = "\xff" # replace OS
expected = %w[1f8b08000000000002ff4bcbcf07002165738c03000000].pack("H*")
@@ -1155,7 +1155,7 @@
def test_gunzip
src = %w[1f8b08000000000000034bcbcf07002165738c03000000].pack("H*")
- assert_equal 'foo', Zlib.gunzip(src)
+ assert_equal 'foo', Zlib.gunzip(src.freeze)
src = %w[1f8b08000000000000034bcbcf07002165738c03000001].pack("H*")
assert_raise(Zlib::GzipFile::LengthError){ Zlib.gunzip(src) }
Updated by nobu (Nobuyoshi Nakada) almost 8 years ago
- Status changed from Open to Closed
Applied in changeset r57042.
zlib.c: replace with substring
- ext/zlib/zlib.c (zstream_discard_input): replace with unread
portion substring, not modifying the input buffer directly.
[ruby-core:78567] [Bug #13021]
Actions
Like0
Like0Like0Like0