src/chunk.rs

@@ -1,7 +1,7 @@
-use std::fmt::{write, Display};
+use std::{fmt::Display};
 use crc::Crc;
 
-use crate::chunk_type::ChunkType;
+use crate::chunk_type::{self, ChunkType};
 
 struct Chunk {
     length:     u32,
@@ -11,24 +11,8 @@ struct Chunk {
 }
 
 impl Chunk {
-    fn new(chunktype: ChunkType, data: Vec<u8>) -> Chunk {
-        let x25: Crc<u32> = Crc::<u32>::new(&crc::CRC_32_ISO_HDLC);
-
-        let to_hash: Vec<u8> = chunktype
-            .bytes()
-            .iter()
-            .chain(&data)
-            .copied()
-            .collect();
-
-        let crc_value = x25.checksum(&to_hash);
-
-        Chunk {
-            length: data.len() as u32,
-            chunk_type: chunktype,
-            chunk_data: data,
-            crc: crc_value,
-        }
+    fn new(chunk_type: ChunkType, data: Vec<u8>) -> Chunk {
+        todo!()
     }
 
     fn length(&self) -> u32 {
@@ -48,25 +32,11 @@ impl Chunk {
     }
 
     fn data_as_string(&self) -> Result<String, &'static str> {
-        let to_stringify: Vec<u8> = self.chunk_data.clone();
-
-        if self.length() == 0 {
-            Err("diocane")
-        } else {
-            Ok(String::from_utf8(to_stringify).unwrap())
-        }
+        todo!()
     }
 
     fn as_bytes(&self) -> Vec<u8> {
-        let bytes: Vec<u8> = self.length()
-            .to_be_bytes()
-            .iter()
-            .chain(self.chunk_type.bytes().iter())
-            .chain(self.chunk_data.iter())
-            .chain(self.crc().to_be_bytes().iter())
-            .copied().collect();
-
-        bytes
+        todo!()
     }
 }
 
@@ -94,7 +64,7 @@ impl TryFrom<&[u8]> for Chunk {
 
         let mut chunk_data_vec: Vec<u8> = Vec::new();
 
-        for byte in &value[8..(slice_length -4)] {
+        for byte in &value[(slice_length - 8)..(slice_length -4)] {
             chunk_data_vec.push(*byte)
         }
 
@@ -113,36 +83,14 @@ impl TryFrom<&[u8]> for Chunk {
             crc: crc_from_slice,
         };
 
-        let x25: Crc<u32> = Crc::<u32>::new(&crc::CRC_32_ISO_HDLC);
-
-        let to_hash: Vec<u8> = chunk.chunk_type
-            .bytes()
-            .iter()
-            .chain(chunk.chunk_data.iter())
-            .copied()
-            .collect();
-
-        let crc_value = x25.checksum(&to_hash);
-
-        if crc_value != chunk.crc {
-            Err("Invalid bytes (probably crc is wrong)")
-        } else {
-            Ok(chunk)
-        }
-
-
+        Ok(chunk)
 
     }
 }
 
 impl Display for Chunk {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "chunk length:{}\nchunk type: {}\n, chunk message {}\nCRC u32: {}",
-            self.length,
-            self.chunk_type,
-            self.data_as_string().unwrap(),
-            self.crc
-        )
+        todo!()
     }
 }
 

src/chunk_type.rs

@@ -1,5 +1,5 @@
 use core::str;
-use std::str::FromStr;
+use std::{str::FromStr, u8};
 
 fn byte_to_bits(byte: u8) -> [u8; 8] {
     let mut bits = [0u8; 8];
@@ -27,7 +27,7 @@ pub struct ChunkType {
 
 impl ChunkType {
 
-    pub fn bytes(&self) -> [u8; 4] {
+    fn bytes(&self) -> [u8; 4] {
         let bytes: [u8; 4] = [
             self.ancillary_byte,
             self.private_byte,
@@ -58,6 +58,7 @@ impl ChunkType {
                 continue;
             }
         }
+
     }
 
 
@@ -67,10 +68,12 @@ impl ChunkType {
 
     fn is_public(&self) -> bool {
         self.private_byte.is_ascii_uppercase()
+
     }
 
     fn is_reserved_bit_valid(&self) -> bool {
         self.reserved_byte.is_ascii_uppercase()
+
     }
 
     fn is_safe_to_copy(&self) -> bool {
@@ -83,6 +86,7 @@ impl TryFrom<[u8; 4]> for ChunkType {
     type Error = &'static str;
 
     fn try_from(value: [u8; 4]) -> Result<Self, Self::Error> {
+
         let chunk_type = ChunkType {
             ancillary_byte:     value[0],
             private_byte:       value[1],
@@ -103,6 +107,7 @@ impl TryFrom<[u8; 4]> for ChunkType {
                 continue;
             }
         }
+
     }
 }
 
@@ -117,6 +122,7 @@ impl std::fmt::Display for ChunkType {
 
         write!(f, "{}", s)
     }
+
 }
 
 impl FromStr for ChunkType {
@@ -145,6 +151,7 @@ impl FromStr for ChunkType {
                 continue;
             }
         }
+
     }
 }