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Pin unrelated bytes in the remaining ill-formed UTF-8 sweeps

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The wrong-4th-byte sections of unit-unicode3/4/5 became live with #5499
and swept every valid 2nd/3rd byte again (2.4M iterations in unicode4
alone). Pin those bytes like the 2nd/3rd-byte sections, and do the
same for the 3-byte sequences in unit-unicode2.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann committed 2026-09-27 21:46:08 +02:00
1 parent c6bb0844f3
commit e802c98da8
4 files changed
+84 -105
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tests/src/unit-unicode4.cpp
+10 -13
View File
@@ -294,24 +294,21 @@ TEST_CASE("Unicode (4/5)" * doctest::skip())
SECTION("ill-formed: wrong fourth byte")
{
// Pin 2nd/3rd bytes to one valid continuation (#5418).
const int byte2 = 0x80;
const int byte3 = 0x80;
for (int byte1 = 0xF1; byte1 <= 0xF3; ++byte1)
{
for (int byte2 = 0x80; byte2 <= 0xBF; ++byte2)
for (int byte4 = 0x00; byte4 <= 0xFF; ++byte4)
{
for (int byte3 = 0x80; byte3 <= 0xBF; ++byte3)
// skip correct fourth byte
if (0x80 <= byte4 && byte4 <= 0xBF)
{
for (int byte4 = 0x00; byte4 <= 0xFF; ++byte4)
{
// skip correct fourth byte
if (0x80 <= byte4 && byte4 <= 0xBF)
{
continue;
}
check_utf8string(false, byte1, byte2, byte3, byte4);
check_utf8dump(false, byte1, byte2, byte3, byte4);
}
continue;
}
check_utf8string(false, byte1, byte2, byte3, byte4);
check_utf8dump(false, byte1, byte2, byte3, byte4);
}
}
}