Commit Graph

32 Commits

Author SHA1 Message Date
Werner Lemberg d0cfb4e1b2 Update all copyright notices. 2022-01-11 10:54:10 +01:00
Alexei Podtelezhnikov f631542dae [lzw] Preserve decompression stack when relocating to heap.
* src/lzw/ftzopen.c (ft_lzwstate_stack_grow): Copy stack when
relocating to heap.
2021-04-27 11:39:58 -04:00
Werner Lemberg b6e8a71266 Update all copyright notices. 2021-01-17 07:18:48 +01:00
David Turner e13391333f Make macros for header file names optional.
We no longer have to take care of the 8.3 file name limit; this
allows us (a) to introduce longer, meaningful file names, and (b) to
avoid macro names in `#include' lines altogether since some
compilers (most notably Visual C++) doesn't support this properly.

*/*: Replace

   #include FOO_H

with

   #include <freetype/foo.h>

or something similar.  Also update the documentation.
2020-06-08 13:31:55 +02:00
Werner Lemberg e5038be704 Update all copyright notices. 2020-01-19 17:05:19 +01:00
Werner Lemberg 7585997024 Update all copyright notices. 2019-02-23 10:07:09 +01:00
Werner Lemberg f686ad46a3 Update copyright years. 2019-01-22 20:31:44 +01:00
Werner Lemberg 9ac9060df0 [GSoC] src/*.*: Convert block comments to `light' style.
This monster commit was created by applying Nikhil's scripts
`docconverter.py' and `markify.py' to all C header and source files,
followed up by minor manual clean-up.

No change in functionality, of course.

I used commit f7419907bc6044b9b7057f9789866426c804ba82 from
https://github.com/nikramakrishnan/freetype-docs.git.
2018-06-03 09:08:41 +02:00
Werner Lemberg 0a0c22569d Update copyright year. 2018-01-02 09:33:57 +01:00
Werner Lemberg 563ae78022 Update copyright year. 2017-01-04 20:16:34 +01:00
Werner Lemberg f80c4473b6 Replace `++foo' and `--foo' with `foo++' and `foo--', resp. 2016-12-26 23:57:45 +01:00
Werner Lemberg 8521ad99b0 [lzw] Optimize last commit.
* src/lzw/ftzopen.c (ft_lzwstate_get_code): Move check into
conditional clause.
2016-08-16 13:44:38 +02:00
Werner Lemberg 548f68d805 [lzw] Avoid invalid left shift.
* src/lzw/ftzopen.c (ft_lzwstate_get_code): Limit `num_bits'.
2016-08-16 09:46:40 +02:00
Werner Lemberg 8d7b9198e3 [lzw] Avoid buffer overrun.
Reported as

  https://bugzilla.mozilla.org/show_bug.cgi?id=1273283

* src/lzw/ftzopen.c (ft_lzwstate_refill): Ensure `buf_size' doesn't
underflow.
2016-08-16 08:07:58 +02:00
Werner Lemberg 9adeab6452 Update copyright year. 2016-01-13 11:54:10 +01:00
Werner Lemberg 83d4181a36 [lzw] Signedness fixes.
* src/lzw/ftzopen.c, src/lzw/ftzopen.h: Apply.
2015-02-25 08:10:58 +01:00
Werner Lemberg f57fc59e01 Run `src/tools/update-copyright'. 2015-01-17 20:41:43 +01:00
Werner Lemberg f796cf6c6b Normalize copyright notice format. 2015-01-17 20:11:10 +01:00
Tomas Hoger 487913d9a6 Slightly improve LZW_CLEAR handling.
* src/lzw/ftzopen.c (ft_lzwstate_io) <FT_LZW_PHASE_CODE>:
Ensure that subsequent (modulo garbage byte(s)) LZW_CLEAR codes are
handled as clear codes.  This also re-sets old_code and old_char to
predictable values, which is a little better than using `random'
ones if the code following LZW_CLEAR is invalid.
2011-09-11 09:18:10 +02:00
Tomas Hoger 83cb6c0049 Add explicit LZW decompression stack size limit.
Stack larger than 1<<LZW_MAX_BITS is never needed if prefix table is
constructed correctly.  It's even less than that, see e.g.
libarchive code comment for a better size upper bound:

  http://code.google.com/p/libarchive/source/browse/trunk/libarchive/archive_read_support_filter_compress.c?r=3635#121

This patch adds explicit stack size limit, enforced when stack is
realloced.

An alternative is to ensure that code < state->prefix[code - 256]
when traversing prefix table.  Such check is less efficient and
should not be required if prefix table is constructed correctly in
the first place.

* src/lzw/ftzopen.c (ft_lzwstate_stack_grow): Implement it.
2011-09-11 09:13:45 +02:00
Tomas Hoger 86c3c69c15 Protect against loops in the prefix table.
LZW decompressor did not sufficiently check codes read from the
input LZW stream.  A specially-crafted or corrupted input could
create a loop in the prefix table, which leads to memory usage
spikes, as there's no decompression stack size limit.

* src/lzw/ftzopen.c (ft_lzwstate_io) <FT_LZW_PHASE_START>: First
code in valid LZW stream must be 0..255.
<FT_LZW_PHASE_CODE>: In the special KwKwK case, code == free_ent,
code > free_ent is invalid.
2011-09-11 09:08:40 +02:00
suzuki toshiya f420757c73 lzw: Count the size of the memory object by ptrdiff_t. 2009-08-01 00:30:14 +09:00
Werner Lemberg a49db4f866 Copyright. 2009-03-20 07:30:43 +01:00
Werner Lemberg 0a05ba257b Protect against malformed compressed data.
Problem reported by Tavis Ormandy <taviso@google.com>.

* src/lsw/ftzopen.c (ft_lzwstate_io): Test whether `state->prefix' is
zero.
2009-03-20 07:19:45 +01:00
Werner Lemberg 1c8980ef4a * docs/CHANGES: Updated.
Formatting.
2007-05-25 07:11:12 +00:00
David Turner 3e2f953a10 real fix for bug #19910. the .Z format is really badly designed :-( 2007-05-22 13:10:59 +00:00
David Turner 0d0365ec59 avoid heap explosion in the case of malformed .Z font files
related to bug #19910, but not a bugfix yet
2007-05-22 09:53:44 +00:00
Werner Lemberg c6afa1221a * include/freetype/internal/ftmemory.h: s/new/newsz/ (for C++).
(FT_ALLOC): Remove redundant redefinition.

* builds/compiler/gcc-dev.mk (CFLAGS) [g++]: Don't use
`-Wstrict-prototypes'.

* src/base/ftstream.c (FT_Stream_EnterFrame): Add cast.

Formatting, copyright years.
2006-05-02 22:22:16 +00:00
David Turner 9ca782569c * include/freetype/internal/ftmemory.h, src/base/ftbitmap.c,
src/base/ftmac.c, src/base/ftrfork.c, src/lzw/ftzopen.c,
    src/raster/ftrend1.c, src/sfnt/ttpost.c, src/truetype/ttgxvar.c,
    src/type42/t42parse.c, src/winfonts/winfnt.c: hardening the code
    against out-of-bounds conditions when allocating arrays. This is
    for the cases where FT_NEW_ARRAY and FT_RENEW_ARRAY are not used
    already. Introducing the new FT_ALLOC_MULT and FT_REALLOC_MULT
    macros.
2006-05-02 09:00:29 +00:00
Werner Lemberg 84cacd2391 formatting, comment clean-up 2005-10-23 19:25:41 +00:00
Werner Lemberg 560d5fed38 Minor cleanups.
Copyright issues.
2005-10-21 09:08:28 +00:00
David Turner c1b6d08291 * src/base/ftdbgmem.c: fixes to better account for memory reallocations
* src/lzw/ftlzw2.c, src/lzw/ftzopen.h, src/lzw/ftzopen.c, src/lzw/rules.mk:
    first version of LZW loader re-implementation. Apparently, saves about
    260 KB of heap memory when loading tir24.pcf.Z
2005-10-20 15:33:34 +00:00