From a6acac4b77468845237783a02131493135102efd Mon Sep 17 00:00:00 2001
From: Aliaksei Chapyzhenka <alex.drom@gmail.com>
Date: Mon, 6 Jan 2025 15:10:45 -0800
Subject: [PATCH] hash table for ids

---
 bin/build.js           | 15 +++++++++------
 lib/command-handler.js | 29 ++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/bin/build.js b/bin/build.js
index ae5f8d5..d19e67a 100755
--- a/bin/build.js
+++ b/bin/build.js
@@ -25,10 +25,10 @@ const objection = lut => arg => arg.split(/\s+/).reduce((res, key) => {
 }, {});
 
 const properties = {
-  command:      'i8',
-  type:         'i8',
+  definitions:  'ptr',
+  output:       'ptr',
+  id_sum:       'i32',
   size:         'i32',
-  time:         'i64', // current simulation time
   trigger:      'ptr',
   triee:        'ptr', // trigger event emitter
   lifee:        'ptr', // life cycle event emmiter
@@ -43,13 +43,16 @@ const properties = {
   tmpStr2:      'ptr',
   stackPointer: 'i32',
   id:           'ptr',
-  napi_env:     'ptr'
+  napi_env:     'ptr',
+  time:         'i64', // current simulation time
+  command:      'i8',
+  type:         'i8'
 };
 
 const spaces = [' ', '\n', '\r', '\t'];
 const lineSpaces = [' ', '\t'];
 
-const generate = (cb) => {
+const generate = (/* cb */) => {
   // const llparseDot = require('llparse-dot');
 
   const prj = 'vcd_parser';
@@ -303,7 +306,7 @@ const generate = (cb) => {
   // const dot = new llparseDot.Dot();
   // fs.writeFileSync(prj + '.dot', dot.build(declaration));
 
-  cb();
+  // cb();
 };
 
 generate(gyp);
diff --git a/lib/command-handler.js b/lib/command-handler.js
index 7abc327..d78b394 100644
--- a/lib/command-handler.js
+++ b/lib/command-handler.js
@@ -14,15 +14,42 @@ const handleUpScope = (info /* , str */) => {
   // console.log(['upscope', str]);
 };
 
+const updateIdTable = ($, link) => {
+  if ($.ido[link] !== undefined) { // old Id
+    return;
+  }
+
+  // polynomial rolling hash function
+  let hash = 0;
+  let poly = 1;
+  for (let i = 0; i < link.length; i++) {
+    const c = link.charCodeAt(i) - 33 + 1; // ! .. ~ (94 digits)
+    hash = (hash + poly * c) & 0xfff;
+    poly = (poly * 97) & 0xfff; // 89, 97
+  }
+
+  $.ido[link] = [$.nextId, hash];
+
+  // add entry to the Hash Table object
+  if ($.hashTable[hash] === undefined) {
+    $.hashTable[hash] = {};
+  }
+
+  $.hashTable[hash][link] = $.nextId;
+  $.nextId += 1;
+};
+
 const handleVar = (info, str) => {
   // reg 3 ( r_reg [2:0]
   // 0   1 2 3+
   const eroj = str.split(/\s+/);
+  const link = eroj[2];
+  updateIdTable(info, link);
   const ero = {
     kind: 'var',
     type: eroj[0],
     size: parseInt(eroj[1]),
-    link: eroj[2],
+    link,
     name: eroj.slice(3).join('')
   };
   {