Unify sync I/O

cli/main.rs

@@ -1,12 +1,7 @@
-use anyhow::Result;
 use clap::{Parser, ValueEnum};
 use cli_table::{Cell, Table};
-use lig_core::{Database, DatabaseRef, Value};
+use lig_core::{Database, Value, SyncIO};
 use rustyline::{error::ReadlineError, DefaultEditor};
-use std::cell::RefCell;
-use std::collections::HashMap;
-use std::fs::File;
-use std::io::{Read, Seek};
 use std::path::PathBuf;
 use std::sync::Arc;
 
@@ -35,7 +30,7 @@ struct Opts {
 
 fn main() -> anyhow::Result<()> {
     let opts = Opts::parse();
-    let io = IO::new();
+    let io = SyncIO::new();
     let db = Database::open(Arc::new(io), opts.database.to_str().unwrap())?;
     let conn = db.connect();
     let mut rl = DefaultEditor::new()?;
@@ -108,47 +103,3 @@ fn main() -> anyhow::Result<()> {
     Ok(())
 }
 
-struct IO {
-    inner: RefCell<IOInner>,
-}
-
-struct IOInner {
-    db_refs: usize,
-    db_files: HashMap<DatabaseRef, File>,
-}
-
-impl lig_core::IO for IO {
-    fn open(&self, path: &str) -> Result<DatabaseRef> {
-        let file = std::fs::File::open(path)?;
-        let mut inner = self.inner.borrow_mut();
-        let db_ref = inner.db_refs;
-        inner.db_refs += 1;
-        inner.db_files.insert(db_ref, file);
-        Ok(db_ref)
-    }
-
-    fn get(&self, database_ref: DatabaseRef, page_idx: usize, buf: &mut [u8]) -> Result<()> {
-        let page_size = buf.len();
-        assert!(page_idx > 0);
-        assert!(page_size >= 512);
-        assert!(page_size <= 65536);
-        assert!((page_size & (page_size - 1)) == 0);
-        let mut inner = self.inner.borrow_mut();
-        let file = inner.db_files.get_mut(&database_ref).unwrap();
-        let pos = (page_idx - 1) * page_size;
-        file.seek(std::io::SeekFrom::Start(pos as u64))?;
-        file.read_exact(buf)?;
-        Ok(())
-    }
-}
-
-impl IO {
-    fn new() -> Self {
-        Self {
-            inner: RefCell::new(IOInner {
-                db_refs: 0,
-                db_files: HashMap::new(),
-            }),
-        }
-    }
-}