Reuse it if possible on consecutive calls to next(). Will signifcantly speed up cases where the entire set is iterated. In local testing iterating a very large set was 10x faster.
../src/hb-set.hh:213:89: error: call to non-'constexpr' function 'const elt_t& hb_vector_size_t<elt_t, byte_size>::operator[](unsigned int) const [with elt_t = long long unsigned int; unsigned int byte_size = 64]'
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).
.
Running a process while the other set is in an error state can potentially corrupt this sets map map (for example by overwritting all of the major values with 0).
If a process operation results in less pages then the current set has, it will likely corrupt the page_map since it overwrites page_map entries ahead of where it's processing. This fixes that problem by removing page_map entries that will be dropped. Then dropping orphaned pages and re-indexing retained pages.
Fixes this -fno-sanitize-recover=undefined fail,
/set/iter: hb-algs.hh:1016:60: runtime error: index 4294967295 out of bounds for type 'unsigned long long const[8]'
#0 0x4d1e09 in hb_vector_size_t<unsigned long long, 64u>::operator[](unsigned int) const /home/user/code/harfbuzz/src/./hb-algs.hh:1016:60
#1 0x4d8b5f in hb_set_t::page_t::previous(unsigned int*) const /home/user/code/harfbuzz/src/./hb-set.hh:139:53
#2 0x4d0ada in hb_set_t::previous(unsigned int*) const /home/user/code/harfbuzz/src/./hb-set.hh:602:36
#3 0x4cd76f in hb_set_previous /home/user/code/harfbuzz/src/hb-set.cc:494:15
#4 0x4ca8af in test_set_iter /home/user/code/harfbuzz/test/api/test-set.c:310:3
#5 0x7f3a4f3e0f49 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x72f49)
#6 0x7f3a4f3e0e7a (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x72e7a)
#7 0x7f3a4f3e1121 in g_test_run_suite (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x73121)
#8 0x7f3a4f3e1140 in g_test_run (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x73140)
#9 0x4c8894 in hb_test_run /home/user/code/harfbuzz/test/api/./hb-test.h:88:10
#10 0x4c8894 in main /home/user/code/harfbuzz/test/api/test-set.c:408:10
#11 0x7f3a4e3d2b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#12 0x41e7d9 in _start (/home/user/code/harfbuzz/test/api/test-set+0x41e7d9)
This reverts commit c4aa10ebc8.
Broke several compilers... Sigh. The version without constexpr
didn't fully optimize out the unreachable code on clang.
So, revert it is...
Behdad Esfahbod
Garret Rieger
Kurt Kartaltepe
Ebrahim Byagowi
ariza
Evgeniy Reizner