mail-parser 1.0.0

Fast and robust e-mail parsing library for Rust
Documentation 
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/*
 * SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <hello@stalw.art>
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 */

use super::{after, is_field_end};
use memchr::{memchr_iter, memmem::Finder};
use std::sync::LazyLock;

static DASH_LINE: LazyLock<Finder<'static>> = LazyLock::new(|| Finder::new(b"\n--"));

pub(crate) fn dash_line(hay: &[u8], from: usize) -> Option<usize> {
    DASH_LINE.find(hay.get(from..)?).map(|pos| pos + from)
}

pub(crate) fn field_end(hay: &[u8], from: usize) -> Option<usize> {
    memchr_iter(b'\n', hay.get(from..)?)
        .map(|pos| pos + from)
        .find(|&pos| is_field_end(after(hay, pos)))
}