Add very basic parser for header and display

Author: emersion

.gitignore

@@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+Cargo.lock

Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "edid"
+version = "0.1.0"
+authors = ["emersion"]
+
+[dependencies]
+nom = "3.2.0"

src/lib.rs

@@ -0,0 +1,57 @@
+#[macro_use]
+extern crate nom;
+
+use nom::{le_u8, le_u16, le_u32};
+
+#[derive(Debug, PartialEq)]
+struct Header {
+	vendor: u16,
+	product: u16,
+	serial: u32,
+	version: u8,
+	revision: u8,
+}
+
+named!(header<&[u8], Header>, do_parse!(
+	tag!(&[0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00][..])
+	>> vendor: le_u16
+	>> product: le_u16
+	>> serial: le_u32
+	>> le_u8 // week
+	>> le_u8 // year
+	>> version: le_u8
+	>> revision: le_u8
+	>> (Header{vendor, product, serial, version, revision})
+));
+
+#[derive(Debug, PartialEq)]
+struct Display {
+	video_input: u8,
+	width: u8, // cm
+	height: u8, // cm
+	gamma: u8, // datavalue = (gamma*100)-100 (range 1.00–3.54)
+	features: u8,
+}
+
+named!(display<&[u8], Display>, do_parse!(
+	video_input: le_u8
+	>> width: le_u8
+	>> height: le_u8
+	>> gamma: le_u8
+	>> features: le_u8
+	>> (Display{video_input, width, height, gamma, features})
+));
+
+named!(edid<&[u8], (Header, Display)>, tuple!(header, display));
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn test_host() {
+		let d = include_bytes!("/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-VGA-1/edid");
+		let r = edid(d).unwrap();
+		println!("{:?}", r);
+	}
+}