1960         let prefix_len = min(self.basename_len, 6) as usize;  localVariable
1962         let num_suffix: Option<u32> = if name[prefix_len] as char == '~' {
1963             (name[prefix_len + 1] as char).to_digit(10)
1971         if name[..prefix_len] == self.name[..prefix_len] // 基础名前缀相同
1981         let prefix_len = min(self.basename_len, 2) as usize;  localVariable
1982         let num_suffix: Option<u32> = if name[prefix_len + 4] as char == '~' {
1983             (name[prefix_len + 1] as char).to_digit(10)
1988         if name[..prefix_len] == self.name[..prefix_len] && num_suffix.is_some() && ext_matches {
1993             > = core::str::from_utf8(&name[prefix_len..prefix_len + 4])
2047         let prefix_len: usize = if with_checksum {  localVariable
2048             let prefix_len: usize = min(self.basename_len as usize, 2);  localVariable
2049             buf[..prefix_len].copy_from_slice(&self.name[..prefix_len]);
2050             buf[prefix_len..prefix_len + 4].copy_from_slice(&Self::u16_to_u8_array(self.checksum));
2051             prefix_len + 4
2053             let prefix_len = min(self.basename_len as usize, 6);  localVariable
2054             buf[..prefix_len].copy_from_slice(&self.name[..prefix_len]);
2055             prefix_len
2058         buf[prefix_len] = '~' as u8;
2059         buf[prefix_len + 1] = char::from_digit(num, 10).unwrap() as u8;