73 lines
1.4 KiB
C++
73 lines
1.4 KiB
C++
#pragma once
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#include <luna/Result.h>
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#include <luna/Types.h>
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#include <stddef.h>
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class Utf8StringDecoder
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{
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public:
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Utf8StringDecoder(const char* str);
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usize byte_length() const
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{
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return m_byte_length;
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}
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Result<usize> code_points() const;
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// The caller must ensure that 'buf' is at least code_points() + a NULL wide.
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Result<usize> decode(wchar_t* buf) const;
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Result<usize> decode(wchar_t* buf, usize max) const;
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private:
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const char* m_str;
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usize m_byte_length;
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};
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class Utf8StringEncoder
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{
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public:
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Utf8StringEncoder(const wchar_t* str);
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usize code_points() const
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{
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return m_code_points;
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}
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Result<usize> byte_length() const;
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// The caller must ensure that 'buf' is at least byte_length() + a NULL wide.
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Result<usize> encode(char* buf) const;
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Result<usize> encode(char* buf, usize max) const;
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private:
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const wchar_t* m_str;
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usize m_code_points;
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};
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class Utf8StateDecoder
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{
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public:
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Utf8StateDecoder();
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Result<bool> feed(char c);
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Result<wchar_t> extract();
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void reset();
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private:
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char m_state[4];
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usize m_state_len = 0;
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usize m_state_index = 0;
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wchar_t m_decoded_character;
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bool m_has_character_ready { false };
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};
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class Utf8Encoder
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{
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public:
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// Does not null-terminate. Returns the number of bytes written.
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Result<usize> encode(wchar_t c, char buf[4]);
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};
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