diff options
| author | naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-07-14 09:17:55 +0000 |
|---|---|---|
| committer | naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-07-14 09:17:55 +0000 |
| commit | 7c9c2bc1dd470cd4794d6891b21ee1fc61f401e0 (patch) | |
| tree | 04cf52e468e9c6fdfb44821c86437552584d78db /ext/zlib/zlib.c | |
| parent | d893c123f6b021254b21c920e182d3c64967f5d5 (diff) | |
Zlib::GzipReader#pos underflows after calling #ungetbyte or #ungetc at start of file [Bug #13616]
patched by Andrew Haines <andrew@haines.org.nz> [ruby-core:81488]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59333 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/zlib/zlib.c')
| -rw-r--r-- | ext/zlib/zlib.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c index bc1b47c221..ce1139dc5d 100644 --- a/ext/zlib/zlib.c +++ b/ext/zlib/zlib.c @@ -3393,7 +3393,14 @@ static VALUE rb_gzfile_total_out(VALUE obj) { struct gzfile *gz = get_gzfile(obj); - return rb_uint2inum(gz->z.stream.total_out - ZSTREAM_BUF_FILLED(&gz->z)); + uLong total_out = gz->z.stream.total_out; + long buf_filled = ZSTREAM_BUF_FILLED(&gz->z); + + if (total_out >= (uLong)buf_filled) { + return rb_uint2inum(total_out - buf_filled); + } else { + return LONG2FIX(-(buf_filled - total_out)); + } } /* |