partitions: add helper to determine ME version

src/part/partitions.rs

@@ -11,6 +11,7 @@ use crate::part::{
     gen3::{self, Gen3Partition},
     part::{GenUnknownPartition, Partition},
 };
+use crate::ver::Version;
 
 #[derive(Serialize, Deserialize, Clone, Debug)]
 pub enum Partitions {
@@ -70,6 +71,34 @@ impl Partitions {
         partitions
     }
 
+    pub fn get_me_version(&self) -> Option<Version> {
+        match self {
+            Partitions::Gen2(parts) => {
+                if let Some(Gen2Partition::Dir(d)) =
+                    parts.iter().find(|p| matches!(p, Gen2Partition::Dir(_)))
+                {
+                    Some(d.dir.manifest.header.version)
+                } else {
+                    None
+                }
+            }
+            Partitions::Gen3(parts) => {
+                if let Some(Gen3Partition::Dir(d)) =
+                    parts.iter().find(|p| matches!(p, Gen3Partition::Dir(_)))
+                {
+                    if let Ok(m) = d.cpd.manifest {
+                        Some(m.header.version)
+                    } else {
+                        None
+                    }
+                } else {
+                    None
+                }
+            }
+            _ => None,
+        }
+    }
+
     /// Get ranges not covered by FPT entries.
     pub fn non_covered_ranges(&self) -> Vec<Range<usize>> {
         let mut res = vec![];