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AK: Make Utf8View and Utf32View more consistent

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This enables use of these classes in templated code.
This commit is contained in:
Tom 2020-10-20 09:47:34 -06:00 • committed by Andreas Kling
parent 15642874f3
commit 6413acd78c
5 changed files with 89 additions and 4 deletions
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19
AK/Utf8View.h
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@ -45,6 +45,11 @@ public:
Utf8CodepointIterator& operator++();
u32 operator*() const;
ssize_t operator-(const Utf8CodepointIterator& other) const
{
return m_ptr - other.m_ptr;
}
int code_point_length_in_bytes() const;
bool done() const { return !m_length; }
@ -56,6 +61,8 @@ private:
class Utf8View {
public:
typedef Utf8CodepointIterator Iterator;
Utf8View() { }
explicit Utf8View(const String&);
explicit Utf8View(const StringView&);
@ -80,13 +87,23 @@ public:
return validate(valid_bytes);
}
size_t length_in_code_points() const;
size_t length() const
{
if (!m_have_length) {
m_length = calculate_length();
m_have_length = true;
}
return m_length;
}
private:
const unsigned char* begin_ptr() const;
const unsigned char* end_ptr() const;
size_t calculate_length() const;
StringView m_string;
mutable size_t m_length { 0 };
mutable bool m_have_length { false };
};
}