able to parse all signal trees

src/vcd/types.rs

@@ -21,7 +21,7 @@ pub(super) struct Scope_Idx(pub(super) usize);
 pub(super) struct Signal_Idx(pub(super) usize);
 
 #[derive(Debug)]
-pub(super) enum Sig_Type {Integer, Parameter, Real, Reg, Str, Wire,}
+pub(super) enum Sig_Type {Integer, Parameter, Real, Reg, Str, Wire, Tri1, Time}
 
 #[derive(Debug)]
 pub(super) enum Sig_Value {
@@ -60,4 +60,47 @@ pub struct VCD {
     pub(super) metadata    : Metadata,
     pub(super) all_signals : Vec<Signal>,
     pub(super) all_scopes  : Vec<Scope>,
-    pub(super) scope_roots : Vec<Scope_Idx>}
+    pub(super) scope_roots : Vec<Scope_Idx>}
+
+impl VCD {
+    // TODO : make this a generic traversal function that applies specified 
+    // functions upon encountering scopes and signals
+    fn print_scope_tree(
+        &self,
+        root_scope_idx : Scope_Idx,
+        depth : usize)
+    {
+        let all_scopes  = &self.all_scopes;
+        let all_signals = &self.all_signals;
+
+        let indent = " ".repeat(depth * 4);
+        let Scope_Idx(root_scope_idx) = root_scope_idx;
+        let root_scope = &all_scopes[root_scope_idx];
+        let root_scope_name = &root_scope.name;
+
+        println!("{indent}scope: {root_scope_name}");
+
+        for Signal_Idx(ref signal_idx) in &root_scope.child_signals {
+            let child_signal = &all_signals[*signal_idx];
+            let name = match child_signal {
+                Signal::Data{name, ..} => {name}
+                Signal::Alias{name, ..} => {name}
+            };
+            println!("{indent} - sig: {name}")
+        }
+        println!();
+
+        for scope_idx in &root_scope.child_scopes {
+            // let Scope_Idx(ref scope_idx_usize) = scope_idx;
+            // let child_scope = &all_scopes[*scope_idx_usize];
+            self.print_scope_tree(*scope_idx, depth+1);
+        }
+        // let root = vcd.all_scopes;
+    }
+
+    pub fn print_scopes(&self) {
+        for scope_root in &self.scope_roots {
+            self.print_scope_tree(*scope_root, 0);
+        }
+    }
+}