First attempt at storage engine

storage_engine/src/main.rs

@@ -0,0 +1,54 @@
+use tokio::sync::{Mutex, RwLock};
+use tokio::fs::{File, OpenOptions};
+use tokio::io::{BufReader, BufWriter, AsyncReadExt, AsyncWriteExt, AsyncSeekExt, SeekFrom};
+use tokio::fs;
+
+mod storage_engine;
+
+use crate::storage_engine::*;
+
+#[tokio::main]
+async fn main() -> Result<(), std::io::Error> {
+    println!("STOOOOOOOOOOOORAAAAAAAAAAAGE");
+
+    let blob_name = "blob10.minisql";
+
+    // WARNING: Number of columns is 5?????
+
+    let mut store = Store::new(blob_name, 5).await.map_err(|e| e.to_io_or_panic())?;
+
+    // let store_bytes = store.get_all_bytes().await.map_err(|e| e.to_io_or_panic())?;
+    // println!("{:?}", store_bytes);
+
+    let mut buff: Vec<u8> = vec![0;1];
+    let x = store.file.read_exact(&mut buff[..]).await?;
+    println!("{:?}", buff);
+
+
+    // let entry0: Entry<u32> = Entry::new_deleted(vec![1, 2, 3, 4, 5]);
+    // let entry1: Entry<u32> = Entry::new_deleted(vec![200,200,5,6,7]);
+    // let cursor0 = store.append_entry(&entry0).await.map_err(|e| e.to_io_or_panic())?;
+    // // println!("cursor0 = {}", cursor0);
+
+    // let cursor1 = store.append_entry(&entry1).await.map_err(|e| e.to_io_or_panic())?;
+    // println!("cursor0 = {}, cursor1 = {}", cursor0, cursor1);
+
+    // let mut store = Store::connect(blob_name).await.map_err(|e| e.to_io_or_panic())?;
+    // println!("{:?}", store);
+
+    // let x = store.entry_at::<u32>(16).await.map_err(|e| e.to_io_or_panic())?;
+    // println!("{:?}", x);
+
+    // let store_bytes = store.get_all_bytes().await.map_err(|e| e.to_io_or_panic())?;
+    // println!("{:?}", store_bytes);
+
+    // let mut store = ColumnStore::connect("blob08.minisql").await.map_err(|e| e.to_io_or_panic())?;
+    // let entry2: StoreEntry<u32> = StoreEntry::new_deleted(vec![3, 2, 1]);
+    // let cursor2 = store.append_entry(&entry2).await.map_err(|e| e.to_io_or_panic())?;
+    // println!("cursor2 = {}", cursor2);
+    // println!("{:?}", store);
+
+
+    println!("DONE");
+    Ok(())
+}