2 files changed, 146 insertions, 0 deletions
diff --git a/src/node/encode.rs b/src/node/encode.rs
new file mode 100644
index 0000000..7ae038b
--- /dev/null
+++ b/src/node/encode.rs
@@ -0,0 +1,56 @@
+/*
+	Copyright 2023-2024 Gabriel Bjørnager Jensen.
+
+	This file is part of eAS.
+
+	eAS is free software: you can redistribute it
+	and/or modify it under the terms of the GNU
+	General Public License as published by the Free
+	Software Foundation, either version 3 of the
+	License, or (at your option) any later version.
+
+	eAS is distributed in the hope that it will
+	be useful, but WITHOUT ANY WARRANTY; without
+	even the implied warranty of MERCHANTABILITY or
+	FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+	General Public License for more details.
+
+	You should have received a copy of the GNU
+	General Public License along with eAS. If not,
+	see <https://www.gnu.org/licenses/>.
+*/
+
+use crate::encode_state::EncodeState;
+use crate::node::Node;
+
+impl Node {
+	#[must_use]
+	pub fn encode(&self, _state: &EncodeState) -> Vec<u8> {
+		use Node::*;
+
+		let mut binary = Vec::new();
+
+		match *self {
+			// These don't leak into the binary:
+			| Code16
+			| Code32
+			| End
+			=> {},
+
+			Fill(repeat, value, size) => {
+				let mut bytes = Vec::from(value.to_le_bytes());
+				bytes.resize(size as usize, 0x00);
+
+				for _ in 0x0..repeat { binary.extend_from_slice(&bytes) }
+			}
+
+			Space(length) => for _ in 0x0..length { binary.push(0x00) },
+
+			// In case we missed something.
+			#[allow(unreachable_patterns)]
+			_ => todo!(),
+		};
+
+		return binary;
+	}
+}
diff --git a/src/node/parse.rs b/src/node/parse.rs
new file mode 100644
index 0000000..3137e97
--- /dev/null
+++ b/src/node/parse.rs
@@ -0,0 +1,90 @@
+/*
+	Copyright 2023-2024 Gabriel Bjørnager Jensen.
+
+	This file is part of eAS.
+
+	eAS is free software: you can redistribute it
+	and/or modify it under the terms of the GNU
+	General Public License as published by the Free
+	Software Foundation, either version 3 of the
+	License, or (at your option) any later version.
+
+	eAS is distributed in the hope that it will
+	be useful, but WITHOUT ANY WARRANTY; without
+	even the implied warranty of MERCHANTABILITY or
+	FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+	General Public License for more details.
+
+	You should have received a copy of the GNU
+	General Public License along with eAS. If not,
+	see <https://www.gnu.org/licenses/>.
+*/
+
+use crate::error::Error;
+use crate::node::Node;
+use crate::source_location::SourceLocation;
+use crate::token::Token;
+
+macro_rules! complete_node {
+	($nodes: expr, $new_node: expr, $flag: ident) => {{
+		$nodes.push($new_node);
+		$flag = true;
+		continue;
+	}};
+}
+
+impl Node {
+	#[must_use]
+	pub fn parse(tokens: &[(SourceLocation, Token)]) -> Result<Vec<Self>, Error> {
+		assert!(tokens.len() > 0x0);
+
+		let mut file: Option<&str> = None;
+
+		let mut nodes: Vec<Self> = Vec::new();
+
+		let mut got_end       = false;
+		let mut node_complete = true;
+
+		for (location, token) in tokens {
+			use Token::*;
+
+			file = Some(location.file());
+
+			match token {
+				Word(word) => match word.as_str() {
+					| "CODE16"
+					| "code16"
+					| "THUMB"
+					| "thumb"
+					=> complete_node!(nodes, Node::Code16, node_complete),
+
+					| "ARM"
+					| "arm"
+					| "CODE32"
+					| "code32"
+					=> complete_node!(nodes, Node::Code32, node_complete),
+
+					| "END"
+					| "end"
+					=> {
+						got_end = true;
+						complete_node!(nodes, Node::End, node_complete);
+					},
+
+					_ => return Err(Error::UnknownMnemonic(word.clone(), location.clone())),
+				},
+
+				Return => {
+					if !node_complete { return Err(Error::IncompleteNode(location.clone())) };
+					continue;
+				},
+
+				_ => {},
+			};
+		}
+
+		if !got_end { return Err(Error::EndOfFile(file.unwrap().to_string())) };
+
+		return Ok(nodes);
+	}
+}