fix some errors/typos and prep for refactoring

src/vcd/parse/events.rs

@@ -2,7 +2,6 @@
 // This program is distributed under both the GPLV3 license
 // and the YEHOWSHUA license, both of which can be found at
 // the root of the folder containing the sources for this program.
-use num::Zero;
 
 use super::*;
 
@@ -13,7 +12,6 @@ pub(super) fn parse_events<'a>(
 ) -> Result<(), String> {
     let mut curr_tmstmp_lsb_idx = 0u32;
     let mut curr_tmstmp_len_u8 = 0u8;
-    let mut curr_time = BigUint::zero();
     loop {
         let next_word = word_reader.next_word();
 
@@ -42,7 +40,6 @@ pub(super) fn parse_events<'a>(
                             "Error near {f}:{l}. Failed to parse {value} as BigInt at {cursor:?}"
                         )
                     })?;
-                curr_time = value.clone();
                 let mut value = value.to_bytes_le();
                 // TODO : u32 helps with less memory, but should ideally likely be
                 // configurable.
@@ -422,7 +419,6 @@ pub(super) fn parse_events<'a>(
                         ref mut signal_error,
                         num_bits,
                         string_vals,
-                        byte_len_of_num_tmstmp_vals_on_tmln,
                         byte_len_of_string_tmstmp_vals_on_tmln,
                         lsb_indxs_of_string_tmstmp_vals_on_tmln,
                         ..
@@ -497,12 +493,8 @@ pub(super) fn parse_events<'a>(
 
                 match signal {
                     Signal::Data {
-                        name,
-                        sig_type,
                         ref mut signal_error,
-                        num_bits,
                         string_vals,
-                        byte_len_of_num_tmstmp_vals_on_tmln,
                         byte_len_of_string_tmstmp_vals_on_tmln,
                         lsb_indxs_of_string_tmstmp_vals_on_tmln,
                         ..

src/vcd/signal.rs

@@ -28,6 +28,7 @@ pub(super) enum TimelineQueryResults {
     String(String),
 }
 
+
 #[derive(Debug)]
 pub enum Signal {
     Data {
@@ -100,18 +101,6 @@ type SignalValNum = BigUint;
 
 // getter functions
 impl Signal {
-    pub fn self_idx(&self) -> Result<SignalIdx, String> {
-        match self {
-            Signal::Data { self_idx, ..} => {return Ok(self_idx.clone())},
-            Signal::Alias { .. } => Err(format!(
-                "Error near {}:{}. A signal alias shouldn't \
-                 point to a signal alias.",
-                file!(),
-                line!()
-            )),
-        }
-    }
-
     pub fn name(&self) -> String {
         match self {
             Signal::Data { name, ..} => name,

src/vcd/types.rs

@@ -72,6 +72,11 @@ impl VCD {
         let scope = &self.all_scopes[idx];
         scope.child_scopes.clone()
     }
+    pub fn get_children_signal_idxs(&self, scope_idx: ScopeIdx) -> Vec<SignalIdx> {
+        let ScopeIdx(idx) = scope_idx;
+        let scope = &self.all_scopes[idx];
+        scope.child_signals.clone()
+    }
     pub fn scope_name_by_idx(&self, scope_idx: ScopeIdx) -> &String {
         let ScopeIdx(idx) = scope_idx;
         let scope = &self.all_scopes[idx];
@@ -109,40 +114,20 @@ impl VCD {
             )),
         }
     }
-    pub(super) fn dealiasing_signal_idx_to_signal_lookup<'a>(
-        &'a self,
-        idx: &SignalIdx,
-    ) -> Result<&'a Signal, String> {
-        // get the signal pointed to be SignalIdx from the arena
-        let SignalIdx(idx) = idx;
-        let signal = &self.all_signals[*idx];
-
-        // dereference signal if Signal::Alias, or keep idx if Signal::Data
-        let signal_idx = match signal {
-            Signal::Data { self_idx, .. } => *self_idx,
-            Signal::Alias { name, signal_alias } => *signal_alias,
-        };
-
-        // Should now  point to Signal::Data variant, or else there's an error
-        let SignalIdx(idx) = signal_idx;
-        let signal = self.all_signals.get(idx).unwrap();
-        match signal {
-            Signal::Data { .. } => Ok(signal),
-            Signal::Alias { .. } => Err(format!(
-                "Error near {}:{}. A signal alias shouldn't \
-                 point to a signal alias.",
-                file!(),
-                line!()
-            )),
-        }
-    }
-    /// Takes a signal as input and returns the signal if the signal is of the
-    /// Signal::Data variant, else the function follows follows the uses the
+    /// Takes a signal_idx as input and returns the corresponding signal if the 
+    /// corresponding signal is of the Signal::Data variant, else the function the
     /// SignalIdx in the signal_alias field of Signal::Alias variant to index
     /// into the signal arena in the all_signals field of the vcd, and returns
     /// the resulting signal if that signal is a Signal::Data variant, else,
     /// this function returns an Err.
-    pub fn dealiasing_signal_lookup<'a>(&'a self, signal: &Signal) -> Result<&'a Signal, String> {
+    pub fn try_signal_idx_to_signal<'a>(
+        &'a self,
+        idx: SignalIdx,
+    ) -> Result<&'a Signal, String> {
+        // get the signal pointed to be SignalIdx from the arena
+        let SignalIdx(idx) = idx;
+        let signal = &self.all_signals[idx];
+
         // dereference signal if Signal::Alias, or keep idx if Signal::Data
         let signal_idx = match signal {
             Signal::Data { self_idx, .. } => *self_idx,