use crate::{Error, Result, ThreeTuple};
use lazy_static::lazy_static;
use regex::Regex;
lazy_static! {
static ref REPLACE: Regex = Regex::new(r"[^a-zA-Z0-9_\.]").unwrap();
}
pub fn filename_for_path(path: impl AsRef<std::path::Path>) -> Result<String> {
let path = path.as_ref();
let filename = path.file_name().ok_or(Error::InvalidPath)?;
let filename = filename.to_string_lossy().to_string();
let filename = REPLACE.replace_all(&filename, regex::NoExpand("_"));
let filename = filename.trim_start_matches("_");
if filename.len() <= 0 {
return Err(Error::InvalidPath);
}
let filename = if filename.len() > 100 {
filename[..100].to_string()
} else {
filename.to_string()
};
Ok(filename)
}
#[test]
fn test1() {
assert_eq!(
filename_for_path(std::path::Path::new("/tmp/test.txt")).unwrap(),
"test.txt"
);
}
#[test]
fn test2() {
assert_eq!(
filename_for_path(std::path::Path::new("/tmp/_bc&^NU,HH.tar.gz")).unwrap(),
"bc__NU_HH.tar.gz"
);
}
#[test]
fn test3() {
assert_eq!(
filename_for_path(std::path::Path::new("/tmp/_你好.txt")).unwrap(),
".txt"
);
}
#[test]
fn test4() {
assert_eq!(
filename_for_path(std::path::Path::new("/tmp/.env.dev")).unwrap(),
".env.dev"
);
}
#[tokio::test]
async fn test_file_read() {
let path = "./README.md";
use tokio::fs::File;
use tokio::io::AsyncReadExt;
let mut file = File::open(path).await.unwrap();
let mut buf = [0; 1024];
loop {
let b_size = file.read(&mut buf).await.unwrap();
println!("read: {} [{}]", b_size, String::from_utf8_lossy(&buf));
if b_size == 0 {
break;
}
}
}
const CRC_IBM_TABLE: [u16; 256] = [
0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, 0xc601, 0x06c0, 0x0780, 0xc741,
0x0500, 0xc5c1, 0xc481, 0x0440, 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, 0xd801, 0x18c0, 0x1980, 0xd941,
0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341,
0x1100, 0xd1c1, 0xd081, 0x1040, 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, 0x3c00, 0xfcc1, 0xfd81, 0x3d40,
0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01, 0x2ec0, 0x2f80, 0xef41,
0x2d00, 0xedc1, 0xec81, 0x2c40, 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, 0xa001, 0x60c0, 0x6180, 0xa141,
0x6300, 0xa3c1, 0xa281, 0x6240, 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01, 0x6ac0, 0x6b80, 0xab41,
0x6900, 0xa9c1, 0xa881, 0x6840, 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 0xb401, 0x74c0, 0x7580, 0xb541,
0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, 0x9601, 0x56c0, 0x5780, 0x9741,
0x5500, 0x95c1, 0x9481, 0x5440, 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 0x8801, 0x48c0, 0x4980, 0x8941,
0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201, 0x42c0, 0x4380, 0x8341,
0x4100, 0x81c1, 0x8081, 0x4040,
];
pub fn crc_ibm(buffer: &[u8]) -> u16 {
let mut crc = 0x0000u16;
let mut lut = 0;
let mut len = buffer.len();
let mut i = 0;
while len > 0 {
lut = (crc ^ (buffer[i] as u16)) & 0xFF;
crc = (crc >> 8) as u16 ^ CRC_IBM_TABLE[lut as usize];
len -= 1;
i += 1;
}
return crc;
}
use crc::{Algorithm, Crc, CRC_16_IBM_SDLC};
pub const X25: Crc<u16> = Crc::<u16>::new(&CRC_16_IBM_SDLC);
#[inline]
pub fn crc_ibm2(buf: &[u8]) -> u16 {
X25.checksum(buf)
}
#[test]
fn test_crc() {
let buf = b"123456789";
let c1 = crc_ibm(buf);
let c2 = crc_ibm2(buf);
}