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AK+LibUnicode: Implement String::equals_ignoring_case without allocating

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We currently fully casefold the left- and right-hand sides to compare
two strings with case-insensitivity. Now, we casefold one code point at
a time, storing the result in a view for comparison, until we exhaust
both strings.
This commit is contained in:
Timothy Flynn 2023-03-08 13:03:04 -05:00 • committed by Linus Groh
parent 4aee4e80bd
commit 1393ed2000
6 changed files with 150 additions and 52 deletions
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2
Userland/Libraries/LibUnicode/UnicodeUtils.h
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@ -9,6 +9,7 @@
#include <AK/Error.h>
#include <AK/Forward.h>
#include <AK/Optional.h>
#include <AK/Utf32View.h>
#include <AK/Utf8View.h>
#include <LibUnicode/Forward.h>
@ -18,5 +19,6 @@ ErrorOr<void> build_lowercase_string(Utf8View code_points, StringBuilder& builde
ErrorOr<void> build_uppercase_string(Utf8View code_points, StringBuilder& builder, Optional<StringView> const& locale);
ErrorOr<void> build_titlecase_string(Utf8View code_points, StringBuilder& builder, Optional<StringView> const& locale);
ErrorOr<void> build_casefold_string(Utf8View code_points, StringBuilder& builder);
Utf32View casefold_code_point(u32 const& code_point);
}