basic cli working

src/main.rs

@@ -3,9 +3,81 @@
 mod args;
 use args::Args;
 
+use hashstream::{CRC32TYPE, HashType, Hashes};
+
 use clap::Parser;
 
+use std::io;
+use std::io::{Read, stdin};
+use std::process::exit;
+
 fn main() {
     let args = Args::parse();
-    println!("Hello, world!");
+    let mut hashes = Vec::new();
+
+    if args.sha256 || args.all {
+        hashes.push(HashType::SHA256)
+    }
+
+    if args.sha3_256 || args.all {
+        hashes.push(HashType::SHA3_256)
+    }
+
+    if args.sha1 || args.all {
+        hashes.push(HashType::SHA1)
+    }
+
+    if args.crc32_iso || args.all {
+        hashes.push(HashType::CRC32(CRC32TYPE::ISO))
+    }
+
+    if args.crc32_posix || args.all {
+        hashes.push(HashType::CRC32(CRC32TYPE::CKSUM))
+    }
+
+    if args.crc32_xfer || args.all {
+        hashes.push(HashType::CRC32(CRC32TYPE::XFER))
+    }
+
+    if args.blake256 || args.all {
+        hashes.push(HashType::BLAKE256)
+    }
+
+    if args.blake512 || args.all {
+        hashes.push(HashType::BLAKE512)
+    }
+
+    if args.blake3 || args.all {
+        hashes.push(HashType::BLAKE3)
+    }
+
+    if args.md5 || args.all {
+        hashes.push(HashType::MD5)
+    }
+
+    if hashes.is_empty() {
+        eprintln!("Error: At least one hashtype or --all is required");
+        exit(255);
+    }
+
+    let mut hashers = Hashes::new(&hashes);
+
+    let stdin = stdin();
+    let mut lock = stdin.lock();
+
+    let mut buf = [0u8; 1024];
+
+    while let Ok(count) = lock.read(&mut buf) {
+        if count > 0 {
+            hashers.digest(&buf[0..count])
+        } else {
+            break;
+        }
+    }
+
+    let ret = hashers.complete();
+
+    for hash in ret {
+        println!("{}", hash.serialize())
+    }
 }