Created binary_loader

binary_loader/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "binary_loader"
+version = "0.1.0"
+authors = ["Jon Janzen <jon@endofeternity.ca>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

binary_loader/src/lib.rs

@@ -0,0 +1,79 @@
+pub fn load_high_u4(raw: u8) -> u8 {
+    (raw & 0xF0) >> 4
+}
+
+pub fn load_low_u4(raw: u8) -> u8 {
+    raw & 0x0F
+}
+
+pub fn load_u8(raw: u8) -> u8 {
+    raw
+}
+
+pub fn load_u32(raw: [u8; 4]) -> u32 {
+    let mut value: u32 = 0;
+    let temp: u32 = raw[0].into();
+    value = temp << 24;
+    let temp: u32 = raw[1].into();
+    value |= temp << 16;
+    let temp: u32 = raw[2].into();
+    value |= temp << 8;
+    let temp: u32 = raw[3].into();
+    value |= temp;
+    value
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn load_0() {
+        assert_eq!(0, load_u32([0, 0, 0, 0]));
+    }
+    
+    #[test]
+    fn load_1() {
+        assert_eq!(1, load_u32([0, 0, 0, 1]));
+    }
+    
+    #[test]
+    fn load_big() {
+        assert_eq!(0x01000000, load_u32([1, 0, 0, 0]));
+    }
+
+    #[test]
+    fn test_load_low_u4() {
+        assert_eq!(0x07, load_low_u4(0x07));
+    }
+    
+    #[test]
+    fn load_low_u4_with_high_data() {
+        assert_eq!(0x03, load_low_u4(0x13));
+    }
+
+    #[test]
+    fn load_low_u4_with_only_high_data() {
+        assert_eq!(0x00, load_low_u4(0x30));
+    }
+
+    #[test]
+    fn test_load_high_u4() {
+        assert_eq!(0x07, load_high_u4(0x70));
+    }
+    
+    #[test]
+    fn load_high_u4_with_low_data() {
+        assert_eq!(0x01, load_high_u4(0x13));
+    }
+
+    #[test]
+    fn load_high_u4_with_only_low_data() {
+        assert_eq!(0x00, load_high_u4(0x03));
+    }
+
+    #[test]
+    fn test_load_u8() {
+        assert_eq!(0x43, load_u8(0x43));
+    }
+}