feat: split engine into crates

1 files changed, 0 insertions, 131 deletions

diff --git a/src/executor.rs b/src/executor.rs
deleted file mode 100644
index c5fff93..0000000
--- a/src/executor.rs
+++ /dev/null
@@ -1,131 +0,0 @@
-//! Executor implementation for Brainfuck.
-
-use miette::Diagnostic;
-use num_traits::{One, WrappingAdd, WrappingSub, Zero};
-use thiserror::Error;
-
-use crate::{engine::Engine, parser::Instruction};
-
-/// Runtime errors that can occur in brainfuck executor.
-#[derive(Debug, Diagnostic, Error)]
-pub enum Error {
-	/// Brainfuck engine ran into an error at runtime.
-	#[error(transparent)]
-	Engine(#[from] crate::engine::Error),
-
-	/// Brainfuck code performed an out of bounds index on the tape during
-	/// runtime.
-	#[error("tape indexed out of bounds, attempted index at `{0}`")]
-	IndexOutOfBounds(usize),
-}
-
-/// Struct for executor implementation, allows u8 Engine to be implemented.
-#[derive(Clone, Copy, Debug)]
-pub struct U8;
-
-/// Struct for executor implementation, allows u16 Engine to be implemented.
-#[derive(Clone, Copy, Debug)]
-#[cfg(feature = "engine-u16")]
-pub struct U16;
-
-/// Struct for executor implementation, allows u32 Engine to be implemented.
-#[derive(Clone, Copy, Debug)]
-#[cfg(feature = "engine-u32")]
-pub struct U32;
-
-/// Trait that must be implemented by all executors.
-pub trait Executor<E: Engine> {
-	/// Executes the provided instruction set, utilising the provided tape.
-	///
-	/// # Errors
-	///
-	/// This function will return an error if the Brainfuck code indexes out of
-	/// bounds of the tape, or if the executor cannot read an input byte from
-	/// stdin.
-	fn execute(
-		instructions: &[Instruction],
-		tape: &mut [E::TapeInner],
-		data_pointer: &mut usize,
-	) -> Result<(), Error>;
-}
-
-impl<E> Executor<E> for E
-where
-	E: Engine,
-{
-	#[inline]
-	fn execute(
-		instructions: &[Instruction],
-		tape: &mut [<E as Engine>::TapeInner],
-		data_pointer: &mut usize,
-	) -> Result<(), Error> {
-		execute::<E>(instructions, tape, data_pointer)
-	}
-}
-
-/// Executes the provided instruction set, utilising the provided tape. This
-/// function allows specifying the Brainfuck engine implementation per call.
-///
-/// # Errors
-///
-/// This function will return an error if the Brainfuck code indexes out of
-/// bounds of the tape, or if the executor cannot read an input byte from
-/// stdin.
-pub fn execute<E: Engine>(
-	instructions: &[Instruction],
-	tape: &mut [E::TapeInner],
-	data_pointer: &mut usize,
-) -> Result<(), Error> {
-	for instruction in instructions {
-		match *instruction {
-			Instruction::IncrementPointer => {
-				let tape_len: usize = tape.len() - 1;
-
-				if *data_pointer == tape_len {
-					*data_pointer = 0;
-				} else {
-					*data_pointer += 1;
-				}
-			}
-			Instruction::DecrementPointer => {
-				*data_pointer = match *data_pointer {
-					0 => tape.len() - 1,
-					_ => *data_pointer - 1,
-				};
-			}
-			Instruction::IncrementByte => match tape.get_mut(*data_pointer) {
-				Some(value) => *value = value.wrapping_add(&E::TapeInner::one()),
-				None => return Err(Error::IndexOutOfBounds(*data_pointer)),
-			},
-			Instruction::DecrementByte => match tape.get_mut(*data_pointer) {
-				Some(value) => *value = value.wrapping_sub(&E::TapeInner::one()),
-				None => return Err(Error::IndexOutOfBounds(*data_pointer)),
-			},
-			Instruction::OutputByte => {
-				E::write_byte(match tape.get(*data_pointer) {
-					Some(value) => *value,
-					None => return Err(Error::IndexOutOfBounds(*data_pointer)),
-				})?;
-			}
-			Instruction::InputByte => {
-				let input = E::read_byte()?;
-
-				match tape.get_mut(*data_pointer) {
-					Some(value) => *value = input,
-					None => return Err(Error::IndexOutOfBounds(*data_pointer)),
-				};
-			}
-			Instruction::Loop(ref instructions) => {
-				while match tape.get(*data_pointer) {
-					Some(value) => value,
-					None => return Err(Error::IndexOutOfBounds(*data_pointer)),
-				} != &E::TapeInner::zero()
-				{
-					execute::<E>(instructions, tape, data_pointer)?;
-				}
-			}
-		}
-	}
-
-	Ok(())
-}