Remove Box from Vec conversion

src/filesystem.rs

@@ -1,6 +1,5 @@
 use aes::Aes128;
 use alloc::{
-    boxed::Box,
     collections::{BTreeMap, VecDeque},
     vec,
 };
@@ -14,8 +13,8 @@ use crate::{
     HEADER_RING, RECORD_SIZE,
 };
 
-fn compress_cache() -> Box<[u8]> {
-    vec![0; lz4_flex::block::get_maximum_output_size(RECORD_SIZE as usize)].into_boxed_slice()
+fn compress_cache() -> Vec<u8> {
+    vec![0; lz4_flex::block::get_maximum_output_size(RECORD_SIZE as usize)]
 }
 
 /// A file system
@@ -28,7 +27,7 @@ pub struct FileSystem<D: Disk> {
     pub header: Header,
     pub(crate) allocator: Allocator,
     pub(crate) cipher_opt: Option<Xts128<Aes128>>,
-    pub(crate) compress_cache: Box<[u8]>,
+    pub(crate) compress_cache: Vec<u8>,
     pub node_usages: BTreeMap<u32, u64>,
 }
 

src/record.rs

@@ -1,16 +1,15 @@
-use alloc::{boxed::Box, vec};
+use alloc::vec;
 use core::ops;
 
 use crate::{BlockLevel, BlockTrait, RECORD_LEVEL};
 
-//TODO: this is a box to prevent stack overflows
 #[derive(Clone)]
-pub struct RecordRaw(pub(crate) Box<[u8]>);
+pub struct RecordRaw(pub(crate) Vec<u8>);
 
 unsafe impl BlockTrait for RecordRaw {
     fn empty(level: BlockLevel) -> Option<Self> {
         if level.0 <= RECORD_LEVEL {
-            Some(Self(vec![0; level.bytes() as usize].into_boxed_slice()))
+            Some(Self(vec![0; level.bytes() as usize]))
         } else {
             None
         }

src/transaction.rs

@@ -1,5 +1,4 @@
 use alloc::{
-    boxed::Box,
     collections::{BTreeMap, VecDeque},
     vec::Vec,
 };
@@ -73,7 +72,7 @@ pub struct Transaction<'a, D: Disk> {
     pub(crate) allocator: Allocator,
     allocator_log: VecDeque<AllocEntry>,
     deallocate: Vec<BlockAddr>,
-    pub(crate) write_cache: BTreeMap<BlockAddr, Box<[u8]>>,
+    pub(crate) write_cache: BTreeMap<BlockAddr, Vec<u8>>,
 }
 
 impl<'a, D: Disk> Transaction<'a, D> {
@@ -484,11 +483,8 @@ impl<'a, D: Disk> Transaction<'a, D> {
             return Err(Error::new(ENOENT));
         }
 
-        //TODO: do not convert to boxed slice if it already is one
-        self.write_cache.insert(
-            block.addr(),
-            block.data().deref().to_vec().into_boxed_slice(),
-        );
+        self.write_cache
+            .insert(block.addr(), block.data().deref().to_vec());
 
         Ok(block.create_ptr())
     }