Hashmap for file:signals pairs, signal_data file

src/headparse.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, u64, vec};
+use std::{collections::HashMap, hash::Hash, u64, vec};
 
 use crate::SignalFormat;
 
@@ -153,7 +153,7 @@ enum AdcBlockKeys {
 /// 
 /// By minimum, only carries the `filename`, `format`, and `adc_zero` attributes
 #[derive(Debug, Clone)]
-struct SignalSpec {
+pub struct SignalSpec {
     filename: String,
     format: SignalFormat,
     samples_frame: Option<u64>,
@@ -425,6 +425,14 @@ impl Header {
             None => true
         }
     }
+
+    pub fn signals_per_file(&self) -> HashMap<String, u64> {
+        let mut map: HashMap<String, u64> = HashMap::new();
+        for signal in &self.signal_specs {
+            map.entry(signal.filename.clone()).and_modify(|val: &mut u64| *val += 1 ).or_insert(1);
+        }
+        return map;
+    }
 }
 
 /// Attempts to parse the header file.