src/console.rs


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//! # UART Console module
//!
//! ## Encapsulates base trait for any console.
//! ## Wraps the UART console.

/// # Interface module
///
/// ## Provides trait for consoles.
pub mod interface {
    use core::fmt;
    /// # Write Trait
    ///
    /// Structure must provide ways to:
    ///  - Write individual characters
    ///  - Write formatted strings
    ///  - Flush write queue
    pub trait Write {
        /// # Write Character
        ///
        /// Writes an individual character to a console
        fn write_char(&self, c: char);
        /// # Write Format
        ///
        /// Writes a formatted string to a console
        fn write_fmt(&self, args: fmt::Arguments) -> fmt::Result;
        /// # Flush
        ///
        /// Flush console write queue
        fn flush(&self);
    }

    /// # Statistics Trait
    ///
    /// Structure must provide a way to:
    ///  - Get how many characters have been written
    pub trait Statistics {
        /// # Get Written Chars
        ///
        /// Gets the statistic associated with how many
        /// characters have been written to a console.
        fn chars_written(&self) -> usize {
            0
        }
    }

    /// # All Trait
    ///
    /// Structure must provide both Write + Statistics
    pub trait All: Write + Statistics {}
}

/// # UART console
///
/// Returns a borrow for the UART writer
pub fn console() -> &'static crate::uart::Uart {
    &crate::uart::UART_WRITER
}