Created binary_loader

db/src/lib.rs

@@ -6,6 +6,27 @@ struct DBHeader {
     record_count: u32,
 }
 
+impl DBHeader {
+    fn from(raw: [u8; 8]) -> DBHeader {
+        
+        let mut reserved : u16 = 0x0000;
+        reserved = raw[2].into();
+        reserved <<= 8;
+        let temp : u16 = raw[3].into();
+        reserved |= temp;
+
+        let mut record_count : u32 = 0x00000000;
+
+        DBHeader {
+            magic: raw[0],
+            major_version: (raw[1] | 0xF0) >> 4,
+            minor_version: (raw[1] | 0x0F),
+            reserved: reserved,
+            record_count: record_count,
+        }
+    }
+}
+
 struct RecordHeader {
     field_count: u8,
     length: u8,
@@ -23,4 +44,11 @@ mod tests {
     fn it_works() {
         assert_eq!(2 + 2, 4);
     }
+    
+    #[test]
+    fn load_empty_db_header() {
+        let header = [0xDB, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00];
+        let db_header = DBHeader::from(header);
+        assert_eq!(db_header.magic, 0xDB);
+    }
 }