sieve-rs 1.0.1

Sieve filter interpreter for Rust
Documentation 
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/*
 * SPDX-FileCopyrightText: 2020 Stalwart Labs Ltd <hello@stalw.art>
 *
 * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
 */

use bumpalo::Bump;

#[derive(Default)]
pub struct Arena {
    pub(crate) bump: Bump,
}

impl Arena {
    pub fn new() -> Self {
        Self::default()
    }

    pub fn with_capacity(bytes: usize) -> Self {
        Arena {
            bump: Bump::with_capacity(bytes),
        }
    }

    pub fn reset(&mut self) {
        self.bump.reset();
    }

    pub(crate) fn prepare(&mut self, limit: usize) {
        self.bump.reset();
        if self.bump.allocated_bytes() > limit {
            self.bump = Bump::new();
        }
        self.bump.set_allocation_limit(Some(limit));
    }

    pub fn allocated_bytes(&self) -> usize {
        self.bump.allocated_bytes()
    }
}