include/rive/text/utf.hpp

#ifndef _RIVE_UTF_HPP_
#define _RIVE_UTF_HPP_

#include "rive/text_engine.hpp"

namespace rive
{

class UTF
{
public:
  // returns the number of bytes needed in this sequence
  // For ascii, this will return 1
  static int CountUTF8Length(const uint8_t utf8[]);

  // Decodes the sequence at utf8Ptr, which must be before end, and advances
  // past it. A cut short or stray sequence decodes as U+FFFD.
  static Unichar NextUTF8(const uint8_t** utf8Ptr, const uint8_t* end);

  // Convert the unichar into (1 or 2) utf16 values, and return
  // the number of values.
  static int ToUTF16(Unichar uni, uint16_t utf16[]);

  // Count the number of bytes needed to encode the codepoints to utf8.
  static uint32_t CountCodePointLength(Span<const Unichar> codepoints);

  // Encode a utf8 codepoint into a byte buffer.
  static uint32_t Encode(uint8_t* output, Unichar codepoint);
};

} // namespace rive

#endif