Separate GDB request and response into structs

2025-01-01 17:02:14 -05:00
parent 24487b21b7
commit 9519897711
3 changed files with 201 additions and 179 deletions
@@ -0,0 +1,45 @@
+pub struct Response {
+    buffer: Vec<u8>,
+    checksum: u8,
+}
+
+impl Response {
+    pub fn new(mut buffer: Vec<u8>, ack: bool) -> Self {
+        buffer.clear();
+        if ack {
+            buffer.push(b'+');
+        }
+        buffer.push(b'$');
+        Self {
+            buffer,
+            checksum: 0,
+        }
+    }
+
+    pub fn write_str(mut self, str: &str) -> Self {
+        for char in str.as_bytes() {
+            self.buffer.push(*char);
+            self.checksum = self.checksum.wrapping_add(*char);
+        }
+        self
+    }
+
+    pub fn write_hex_u8(mut self, value: u8) -> Self {
+        for digit in [(value >> 4), (value & 0xf)] {
+            let char = if digit > 9 {
+                b'a' + digit - 10
+            } else {
+                b'0' + digit
+            };
+            self.buffer.push(char);
+            self.checksum = self.checksum.wrapping_add(char);
+        }
+        self
+    }
+
+    pub fn finish(mut self) -> Vec<u8> {
+        let checksum = self.checksum;
+        self.buffer.push(b'#');
+        self.write_hex_u8(checksum).buffer
+    }
+}