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//! Various utilities used throughout tonic.

// some combinations of features might cause things here not to be used
#![allow(dead_code)]

use pin_project::pin_project;

/// A pin-project compatible `Option`
#[pin_project(project = OptionPinProj)]
pub(crate) enum OptionPin<T> {
    Some(#[pin] T),
    None,
}

pub(crate) mod base64 {
    use base64::{
        alphabet,
        engine::{
            general_purpose::{GeneralPurpose, GeneralPurposeConfig},
            DecodePaddingMode,
        },
    };

    pub(crate) const STANDARD: GeneralPurpose = GeneralPurpose::new(
        &alphabet::STANDARD,
        GeneralPurposeConfig::new()
            .with_encode_padding(true)
            .with_decode_padding_mode(DecodePaddingMode::Indifferent),
    );

    pub(crate) const STANDARD_NO_PAD: GeneralPurpose = GeneralPurpose::new(
        &alphabet::STANDARD,
        GeneralPurposeConfig::new()
            .with_encode_padding(false)
            .with_decode_padding_mode(DecodePaddingMode::Indifferent),
    );
}