根据utf8字符首字节,获取utf8字符所占字节数

//根据utf8字符的首字节,获取utf8字符所占字节数
static uint8_t GetUtf8charByteNum(unsigned char ch)
{
uint8_t byteNum = 0;
if (ch >= 0xFC && ch < 0xFE)
byteNum = 6;
else if (ch >= 0xF8)
byteNum = 5;
else if (ch >= 0xF0)
byteNum = 4;
else if (ch >= 0xE0)
byteNum = 3;
else if (ch >= 0xC0)
byteNum = 2;
else if (0 == (ch & 0x80))
byteNum = 1;
return byteNum;
}