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AK: Add UTF-16 helper methods required for use within LibRegex

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To be used as a RegexStringView variant, Utf16View must provide a couple
more helper methods. It must also not default its assignment operators,
because that implicitly deletes move/copy constructors.
This commit is contained in:
Timothy Flynn 2021-07-20 22:25:48 -04:00 • committed by Linus Groh
parent 1d76be97f5
commit 2e45e52993
2 changed files with 81 additions and 9 deletions
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10
AK/Utf16View.h
View file

@ -17,6 +17,7 @@ namespace AK {
Vector<u16> utf8_to_utf16(StringView const&);
Vector<u16> utf8_to_utf16(Utf8View const&);
Vector<u16> utf32_to_utf16(Utf32View const&);
class Utf16View;
@ -67,8 +68,6 @@ public:
{
}
Utf16View& operator=(Utf16View const&) = default;
Utf16View& operator=(Utf16View&&) = default;
bool operator==(Utf16View const& other) const;
enum class AllowInvalidCodeUnits {
@ -78,6 +77,7 @@ public:
String to_utf8(AllowInvalidCodeUnits = AllowInvalidCodeUnits::No) const;
bool is_null() const { return m_code_units.is_null(); }
bool is_empty() const { return m_code_units.is_empty(); }
size_t length_in_code_units() const { return m_code_units.size(); }
size_t length_in_code_points() const;
@ -88,9 +88,15 @@ public:
u16 const* data() const { return m_code_units.data(); }
u16 code_unit_at(size_t index) const;
size_t code_point_offset_of(size_t code_unit_offset) const;
size_t code_unit_offset_of(size_t code_point_offset) const;
Utf16View substring_view(size_t code_unit_offset, size_t code_unit_length) const;
Utf16View substring_view(size_t code_unit_offset) const { return substring_view(code_unit_offset, length_in_code_units() - code_unit_offset); }
Utf16View unicode_substring_view(size_t code_point_offset, size_t code_point_length) const;
Utf16View unicode_substring_view(size_t code_point_offset) const { return unicode_substring_view(code_point_offset, length_in_code_points() - code_point_offset); }
bool validate(size_t& valid_code_units) const;
bool validate() const
{