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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use std::hash::Hasher;
use deno_core::error::AnyError;
use deno_runtime::deno_webstorage::rusqlite::Connection;
/// A very fast insecure hasher that uses the xxHash algorithm.
#[derive(Default)]
pub struct FastInsecureHasher(twox_hash::XxHash64);
impl FastInsecureHasher {
pub fn new() -> Self {
Self::default()
}
pub fn write_str(&mut self, text: &str) -> &mut Self {
self.write(text.as_bytes());
self
}
pub fn write(&mut self, bytes: &[u8]) -> &mut Self {
self.0.write(bytes);
self
}
pub fn write_u8(&mut self, value: u8) -> &mut Self {
self.0.write_u8(value);
self
}
pub fn write_u64(&mut self, value: u64) -> &mut Self {
self.0.write_u64(value);
self
}
pub fn write_hashable(
&mut self,
hashable: &impl std::hash::Hash,
) -> &mut Self {
hashable.hash(&mut self.0);
self
}
pub fn finish(&self) -> u64 {
self.0.finish()
}
}
/// Runs the common sqlite pragma.
pub fn run_sqlite_pragma(conn: &Connection) -> Result<(), AnyError> {
// Enable write-ahead-logging and tweak some other stuff
let initial_pragmas = "
-- enable write-ahead-logging mode
PRAGMA journal_mode=WAL;
PRAGMA synchronous=NORMAL;
PRAGMA temp_store=memory;
PRAGMA page_size=4096;
PRAGMA mmap_size=6000000;
PRAGMA optimize;
";
conn.execute_batch(initial_pragmas)?;
Ok(())
}
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