next_codepoint_offset()

MAYAFLUX_API size_t MayaFlux::Portal::Text::next_codepoint_offset	(	std::string_view	text,
		size_t	byte_offset
	)

Byte offset of the codepoint boundary after byte_offset.

Steps forward exactly one codepoint using the same utf8proc decode lay_out() uses, so malformed sequences are skipped identically rather than by a separate continuation-byte mask. Returns text.size() if already at or past the end.

Parameters

text	UTF-8 encoded string.
byte_offset	Current byte offset, must be a codepoint boundary.

Returns

Byte offset of the next codepoint boundary.

Definition at line 183 of file TypeSetter.cpp.

{
    if (byte_offset >= text.size()) {
        return text.size();
    }
 
    const auto* bytes = reinterpret_cast<const utf8proc_uint8_t*>(text.data());
    const auto remaining = static_cast<utf8proc_ssize_t>(text.size() - byte_offset);
 
    utf8proc_int32_t codepoint = 0;
    const utf8proc_ssize_t n = utf8proc_iterate(bytes + byte_offset, remaining, &codepoint);
 
    return byte_offset + static_cast<size_t>(n > 0 ? n : 1);
}

Referenced by erase(), index_at(), and move().

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