diff options
author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-09-13 10:10:45 +0000 |
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committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-09-13 10:10:45 +0000 |
commit | a8951d1db45ca51c96ffa2c431777eb37c8a2f94 (patch) | |
tree | bcaa37c326975a1771aaf85bb9a2675127f22729 /Build/source/libs/freetype2/freetype-src/src/lzw | |
parent | 873f349d7e0ae42e35ccf4d96fce5a6cfa685fe6 (diff) |
freetype 2.7.0
git-svn-id: svn://tug.org/texlive/trunk@42052 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/lzw')
-rw-r--r-- | Build/source/libs/freetype2/freetype-src/src/lzw/ftzopen.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/src/lzw/ftzopen.c b/Build/source/libs/freetype2/freetype-src/src/lzw/ftzopen.c index e17b3c5247a..9e66ba983f3 100644 --- a/Build/source/libs/freetype2/freetype-src/src/lzw/ftzopen.c +++ b/Build/source/libs/freetype2/freetype-src/src/lzw/ftzopen.c @@ -42,7 +42,12 @@ state->buf_total += count; state->in_eof = FT_BOOL( count < state->num_bits ); state->buf_offset = 0; - state->buf_size = ( state->buf_size << 3 ) - ( state->num_bits - 1 ); + + state->buf_size <<= 3; + if ( state->buf_size > state->num_bits ) + state->buf_size -= state->num_bits - 1; + else + return -1; /* not enough data */ if ( count == 0 ) /* end of file */ return -1; @@ -66,7 +71,10 @@ { if ( state->free_ent >= state->free_bits ) { - state->num_bits = ++num_bits; + state->num_bits = ++num_bits; + if ( num_bits > LZW_MAX_BITS ) + return -1; + state->free_bits = state->num_bits < state->max_bits ? (FT_UInt)( ( 1UL << num_bits ) - 256 ) : state->max_free + 1; |