Previous error-handling philosophy was that user doesn't need to
immediately know whether operation failed. But as can be seen after
we added malloc-failing fuzzing, there's just so many places in the
code that a failure of these operations needs to be mitigated before
further operations. So I'm moving towards returning success here,
and possibly making it nodiscard.
I did a review; changed some "return"s to "break"s, which should be identical.
Removed one check just before "continue" because not necessary.
The added error check is the actual fix.
Should fix https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31755
We treat Class0 as "doesn't intersect". That's the only meaningful
interpretation. If one allos Class0 to mean "intersects", then the
intersects() result should be true iff glyphset is non-empty.
Related to https://github.com/harfbuzz/harfbuzz/issues/2703
Don’t replace Default_Ignorables with zero-width space if they are
substituted or multiplied, not just when ligated.
After this change, HarfBuzz output matches that of Uniscribe and
CoreText for the new tests.
Fixes https://github.com/harfbuzz/harfbuzz/issues/2883
I was getting check-symbols failure because my previous build was
without CoreText, and after reconfiguring with CoreText, the old
harfbuzz.defs file was not being regenerated.
Was producing non-monotonic cluster numbers because our faulty logic
was not merging clusters if something from before base and after base
had switched positions.
Fixes https://github.com/harfbuzz/harfbuzz/issues/2272
Previous commit didn't fix the bots. Putting it back now that I
understand why I initially did the "Wide" casts. But only doing
it for out-cast this time. This causes "narrowing" warnings
whenever we are converting signed/unsigned to smaller HBUINT16
etc. But those are valuable warnings. We should address those
separately instead of ignoring.
Maybe we should start using uint16_t more liberally in the
internal subsetter function signatures then.
My local clang12 is fine, but many bots are not:
../src/hb-ot-cff1-table.hh: In instantiation of ‘bool CFF::Charset1_2<TYPE>::sanitize(hb_sanitize_context_t*, unsigned int) const [with TYPE = OT::IntType<unsigned char>]’:
../src/hb-ot-cff1-table.hh:554:13: required from here
../src/hb-ot-cff1-table.hh:377:60: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
if (unlikely (!ranges[i].sanitize (c) || (num_glyphs < ranges[i].nLeft + 1)))
~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Enabling the extra cast operator mentioned in previous commit to see if
that fixes this case.
Again, I'd be happy to say "use 1u instead of 1" if this was universally
erred on. But since some compilers happily compile this while others
err, it would be a huge headache. Let's see...
https://github.com/harfbuzz/harfbuzz/pull/2875
Say for USHORT, we were implementing casts from and to unsigned.
With this change, we cast from and to uint16_t only. This allows
compiler more opportunities to catch possible narrowing issues in
the code.
It needed a couple of fixes in the codebase though, because
previously, if a USHORT was participating in arithmetic with signed
numbers, eg. "u + 1", the result would have been unsigned. With
this change, it would be signed. The correct fix is to update the
code to read "u + 1u".
That said, I think about conditionally adding back the cast
out to signed/unsigned, to facilitate better type deduction.
But I couldn't think of a real situation where that would help
with anything. So I didn't add. Here's what it was:
template <typename Type2 = hb_conditional<hb_is_signed (Type), signed, unsigned>,
hb_enable_if (sizeof (Type) < sizeof (Type2))>
operator hb_type_identity_t<Type2> () const { return v; }
https://github.com/harfbuzz/harfbuzz/pull/2875
../src/hb-algs.hh:120:3: error: body of constexpr function ‘constexpr BEInt<Type, 2>::operator Type() const [with Type = short unsigned int]’ not a return-statement
The immutable objects are a concept only enforced by the C API.
So move checks only to that region.
This does assume that the rest of the code is careful not getting
into these internal methods on immutable objects, which something
we do, but have no way of enforcing (currently).
.
Some compilers don't like this:
../src/hb-aat-layout-common.hh:732:9: error: declaration of 'using StateTable = struct AAT::StateTable<Types, EntryData>' changes meaning of 'StateTable' [-fpermissive]
732 | using StateTable = StateTable<Types, EntryData>;
The state we are dealing with here is the previous state; so it should
cause unsafe_to_break before current glyph.
I'm surprised this wasn't caught by any tests. Guess we don't have any
fonts with fancy end-of-text forms.
There's no easy way to undo a "using namespace" in our sources, so by the time
we get to include hb-coretext.cc from harfbuzz.cc, we already have "using namespace OT"
active, which clashes with Mac headers.
Error was:
$ gcc -O3 -Wall -arch i386 -DHAVE_CORETEXT=1 -c harfbuzz.cc -o harfbuzz.o -std=c++11
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/TextUtils.h:288:3: error:
reference to 'OffsetTable' is ambiguous
OffsetTable offsets,
^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/IntlResources.h:115:41: note:
candidate found by name lookup is 'OffsetTable'
typedef OffPair OffsetTable[3];
^
./hb-open-file.hh:81:16: note: candidate found by name lookup is 'OT::OffsetTable'
typedef struct OffsetTable
^
1 error generated.
As suggested by Ned, just ignoring it.
warning: 'CTGetCoreTextVersion' is deprecated: first deprecated in macOS 11.0 - Use
-[NSProcessInfo operatingSystemVersion] [-Wdeprecated-declarations]
- Lookup::closure_lookups also checks if the lookups visited and sets the lookup to visited. If we set visited in 'recurse' then Lookup::closure_lookups will fail to recurse into the children of the lookup.
- Also when copying ChainRule's skip LookupRecord's that point to lookups which aren't retained. This matches FontTool's behaviour.
Just avoiding overhead as measured by Garret.
Should rewrite as dagger in the future and confirm that it has the
same benefits. Later on, rewrite as lfind() maybe.
Fixes https://github.com/harfbuzz/harfbuzz/issues/2826
Behdad Esfahbod
David Corbett
Khaled Hosny
justvanrossum
Garret Rieger
josephshen
ckitagawa