[嵌入式]C语言 UTF8ToUTF16 (utf-8字符转换成16进制编码方式)

? 概述

? ? ? ? 应用场景单片机，编码方式转换

uint8_t get_utf8_bytes(uint8_t utf8)
{
	for (uint8_t i = 0; i < 6; i++) {
		if ((utf8 & (0x80 >> i)) == 0) {
			return i == 0? 1: i;
		}
	}

	return 1;
}

uint16_t utf8_TO_utf16(uint8_t *in, uint16_t inLen, uint16_t *out, uint16_t outLen)
{
	uint16_t length = 0;
	uint8_t bytes = 0;

	for (uint16_t i = 0; i < inLen && length < outLen; i++, length++) {
		bytes = get_utf8_bytes(in[i]);

		if (bytes > 1) {
			out[length] = in[i] & (0xFF >> (bytes + 1));
			for (uint8_t j = 1; j < bytes; j++) {
				i++;
				out[length] <<= 6;
				out[length] += in[i] & 0x3F;
			}
		} else {
			out[length] = in[i];
		}
	}

	out[length] = 0;
	return length;
}

总结

? ? ? ?在此做个笔录，方面以后查阅，同时，感谢各位看官赏阅^_^。