1994         let prefix_len = min(self.basename_len, 6) as usize;  localVariable
1996         let num_suffix: Option<u32> = if name[prefix_len] as char == '~' {
1997             (name[prefix_len + 1] as char).to_digit(10)
2005         if name[..prefix_len] == self.name[..prefix_len] // 基础名前缀相同
2016         let prefix_len = min(self.basename_len, 2) as usize;  localVariable
2017         let num_suffix: Option<u32> = if name[prefix_len + 4] as char == '~' {
2018             (name[prefix_len + 1] as char).to_digit(10)
2023         if name[..prefix_len] == self.name[..prefix_len] && num_suffix.is_some() && ext_matches {
2028             > = core::str::from_utf8(&name[prefix_len..prefix_len + 4])
2083         let prefix_len: usize = if with_checksum {  localVariable
2084             let prefix_len: usize = min(self.basename_len as usize, 2);  localVariable
2085             buf[..prefix_len].copy_from_slice(&self.name[..prefix_len]);
2086             buf[prefix_len..prefix_len + 4].copy_from_slice(&Self::u16_to_u8_array(self.checksum));
2087             prefix_len + 4
2089             let prefix_len = min(self.basename_len as usize, 6);  localVariable
2090             buf[..prefix_len].copy_from_slice(&self.name[..prefix_len]);
2091             prefix_len
2094         buf[prefix_len] = b'~';
2095         buf[prefix_len + 1] = char::from_digit(num, 10).unwrap() as u8;