Begin body reading code

src/body.jl

@@ -0,0 +1,48 @@
+"""
+read the body of the FIT file.
+"""
+module body
+
+# TODO: Why do this?
+import Base.show
+
+export RecordHeader, read_row
+
+include("mesg_num.jl")
+using .mesg_num
+
+struct DefinitionMessage end
+struct DataMessage end
+
+"""
+    RecordHeader
+
+The byte that corresponds to the type of message that this record holds.
+"""
+struct RecordHeader
+    definition_message::Bool
+end
+
+
+"""
+    read_row(f::io)
+
+Read a row of the file at a time. Parse the row into a data or def message.
+TODO: Endianness matters here. Need to resolve endianness with the architecture bit.
+"""
+function read_row(f::IO)
+    header_byte = read(f, 1; all=false)[1]
+    println(bitstring(header_byte))
+
+    # The message byte is 7
+    RecordHeader(Bool(parse(Int64, bitstring(header_byte)[2])))
+end
+
+function read_header_byte(f::Core.IO)
+end
+
+function show(io::IO, header::RecordHeader)
+    println(io, header.definition_message ? "DefinitionMessage" : "DataMessage")
+end
+
+end