Function utf16_encode_append

StereoKitC/libraries/unicode.cpp:404–414

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int32_t utf16_encode_append(char16_t *buffer, size_t size, char32_t ch) {
	int32_t count = utf16_encode_units(ch);
	size_t  len   = strlen(buffer);
	if (len + count + 1 >= size) {
		return 0;
	} else {
		count = utf16_encode(&buffer[len], ch);
		buffer[len + count] = '\0';
		return count;
	}
}

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