Restructure program

This commit also includes changes to devices according to the latest
devices specification, in particular the math and system devices.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/types/read_buffer.rs b/src/types/read_buffer.rs
new file mode 100644
index 0000000..7128048
--- /dev/null
+++ b/src/types/read_buffer.rs
@@ -0,0 +1,34 @@
+pub struct ReadBuffer {
+    pub bytes: Vec<u8>,
+    pub pointer: usize,
+}
+
+impl ReadBuffer {
+    pub fn new() -> Self {
+        Self {
+            bytes: Vec::new(),
+            pointer: 0,
+        }
+    }
+
+    pub fn from_str(text: &str) -> Self {
+        Self {
+            bytes: text.bytes().collect(),
+            pointer: 0,
+        }
+    }
+
+    pub fn set_str(&mut self, text: &str) {
+        self.bytes = text.bytes().collect();
+        self.pointer = 0;
+    }
+
+    pub fn read(&mut self) -> u8 {
+        let pointer = self.pointer;
+        self.pointer += 1;
+        match self.bytes.get(pointer) {
+            Some(byte) => *byte,
+            None => 0,
+        }
+    }
+}