From da5c8173a56d5be7fa23d2b18eaba1542aa31dd6 Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Fri, 28 Feb 2025 14:35:04 +1300
Subject: Implement inhx format

inhx is the original Intel hex format.
---
 src/formats/mod.rs | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

(limited to 'src/formats/mod.rs')

diff --git a/src/formats/mod.rs b/src/formats/mod.rs
index 42d198c..82f19f1 100644
--- a/src/formats/mod.rs
+++ b/src/formats/mod.rs
@@ -1,2 +1,45 @@
+mod inhx;
 mod inhx32;
+
+pub use inhx::*;
 pub use inhx32::*;
+
+
+pub struct InhxRecord {
+    bytes: Vec<u8>,
+}
+
+impl InhxRecord {
+    pub fn new() -> Self {
+        Self { bytes: Vec::new() }
+    }
+
+    pub fn byte(&mut self, byte: u8) {
+        self.bytes.push(byte);
+    }
+
+    pub fn be_double(&mut self, double: u16) {
+        let [high, low] = double.to_be_bytes();
+        self.byte(high);
+        self.byte(low);
+    }
+
+    pub fn le_double(&mut self, double: u16) {
+        let [high, low] = double.to_be_bytes();
+        self.byte(low);
+        self.byte(high);
+    }
+
+    pub fn to_string(self) -> String {
+        let mut sum: u8 = 0;
+        for byte in &self.bytes {
+            sum = sum.wrapping_add(*byte);
+        }
+        let checksum = sum.wrapping_neg();
+        let mut output = String::new();
+        for byte in &self.bytes {
+            output.push_str(&format!("{byte:0>2X}"));
+        }
+        format!(":{output}{checksum:0>2X}\n")
+    }
+}
-- 
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