Method append_utf32

core/string/ustring.cpp:176–205

}

void String::append_utf32(const Span<char32_t> &p_cstr) {
	if (p_cstr.is_empty()) {
		return;
	}

	const int prev_length = length();
	resize_uninitialized(prev_length + p_cstr.size() + 1);
	const char32_t *src = p_cstr.ptr();
	const char32_t *end = p_cstr.ptr() + p_cstr.size();
	char32_t *dst = ptrw() + prev_length;

	// Copy the string, and check for UTF-32 problems.
	for (; src < end; ++src, ++dst) {
		const char32_t chr = *src;
		if (unlikely(chr == U'\0')) {
			// NUL in string is allowed by the unicode standard, but unsupported in our implementation right now.
			print_unicode_error("Unexpected NUL character", true);
			*dst = _replacement_char;
		} else if (unlikely((chr & 0xfffff800) == 0xd800)) {
			print_unicode_error(vformat("Unpaired surrogate (%x)", (uint32_t)chr), true);
			*dst = _replacement_char;
		} else if (unlikely(chr > 0x10ffff)) {
			print_unicode_error(vformat("Invalid unicode codepoint (%x)", (uint32_t)chr), true);
			*dst = _replacement_char;
		} else {
			*dst = chr;
		}
	}
	*dst = 0;
}

void String::copy_from_unchecked(const char32_t *p_char, const int p_length) {
	resize_uninitialized(p_length + 1); // + 1 for \0