ladybird/AK/Utf8View.h
Andreas Kling f4e6dae6fe UTF-8: Add Utf8CodepointIterator::codepoint_length_in_bytes()
This allows you to retrieve the length (in bytes) of the codepoint the
iterator is currently pointing at.
2019-10-18 22:49:23 +02:00

59 lines
1.3 KiB
C++

#pragma once
#include <AK/StringView.h>
#include <AK/Types.h>
namespace AK {
class Utf8View;
class Utf8CodepointIterator {
friend class Utf8View;
public:
~Utf8CodepointIterator() {}
bool operator==(const Utf8CodepointIterator&) const;
bool operator!=(const Utf8CodepointIterator&) const;
Utf8CodepointIterator& operator++();
u32 operator*() const;
int codepoint_length_in_bytes() const;
private:
Utf8CodepointIterator(const unsigned char*, int);
const unsigned char* m_ptr { nullptr };
int m_length { -1 };
};
class Utf8View {
public:
explicit Utf8View(const String&);
explicit Utf8View(const StringView&);
explicit Utf8View(const char*);
~Utf8View() {}
const StringView& as_string() const { return m_string; }
Utf8CodepointIterator begin() const;
Utf8CodepointIterator end() const;
const unsigned char* bytes() const { return begin_ptr(); }
int byte_length() const { return m_string.length(); }
int byte_offset_of(const Utf8CodepointIterator&) const;
Utf8View substring_view(int byte_offset, int byte_length) const;
bool is_empty() const { return m_string.is_empty(); }
bool validate() const;
private:
const unsigned char* begin_ptr() const;
const unsigned char* end_ptr() const;
StringView m_string;
};
}
using AK::Utf8View;