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65 lines
1.4 KiB
Rust
65 lines
1.4 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use std::hash::Hasher;
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use deno_core::error::AnyError;
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use deno_runtime::deno_webstorage::rusqlite::Connection;
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/// A very fast insecure hasher that uses the xxHash algorithm.
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#[derive(Default)]
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pub struct FastInsecureHasher(twox_hash::XxHash64);
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impl FastInsecureHasher {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn write_str(&mut self, text: &str) -> &mut Self {
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self.write(text.as_bytes());
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self
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}
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pub fn write(&mut self, bytes: &[u8]) -> &mut Self {
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self.0.write(bytes);
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self
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}
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pub fn write_u8(&mut self, value: u8) -> &mut Self {
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self.0.write_u8(value);
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self
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}
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pub fn write_u64(&mut self, value: u64) -> &mut Self {
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self.0.write_u64(value);
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self
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}
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pub fn write_hashable(
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&mut self,
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hashable: &impl std::hash::Hash,
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) -> &mut Self {
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hashable.hash(&mut self.0);
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self
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}
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pub fn finish(&self) -> u64 {
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self.0.finish()
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}
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}
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/// Runs the common sqlite pragma.
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pub fn run_sqlite_pragma(conn: &Connection) -> Result<(), AnyError> {
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// Enable write-ahead-logging and tweak some other stuff
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let initial_pragmas = "
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-- enable write-ahead-logging mode
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PRAGMA journal_mode=WAL;
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PRAGMA synchronous=NORMAL;
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PRAGMA temp_store=memory;
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PRAGMA page_size=4096;
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PRAGMA mmap_size=6000000;
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PRAGMA optimize;
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";
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conn.execute_batch(initial_pragmas)?;
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Ok(())
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}
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