From 51296f30b8ad83cb986ce498254aa51059cf840d Mon Sep 17 00:00:00 2001
From: Aliaksei Chapyzhenka <alex.drom@gmail.com>
Date: Tue, 29 Sep 2020 13:11:09 -0700
Subject: [PATCH] dump initial timestamp "t0"

---
 test/basic.js      |  1 +
 test/wasm_basic.js |  1 +
 vcd.c              |  2 ++
 vcd_spans.c        | 14 +++++++++++++-
 wasm_main.cpp      |  8 +++++---
 5 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/test/basic.js b/test/basic.js
index 7bbb60a..dc8e97a 100644
--- a/test/basic.js
+++ b/test/basic.js
@@ -85,6 +85,7 @@ b0000000000001111 {u
       date: ' Wed Sep 18 22:59:07 2019\n ',
       version: ' Generated by VerilatedVcd ',
       timescale: '   1ns ',
+      t0: 1,
       varId: 'u)',
       wires: {
         top: {
diff --git a/test/wasm_basic.js b/test/wasm_basic.js
index 1cf8e1d..040529b 100644
--- a/test/wasm_basic.js
+++ b/test/wasm_basic.js
@@ -83,6 +83,7 @@ b0000000000001111 {u
       date: ' Wed Sep 18 22:59:07 2019\n ',
       version: ' Generated by VerilatedVcd ',
       timescale: '   1ns ',
+      t0: 1,
       varId: 'u)',
       wires: {
         top: {
diff --git a/vcd.c b/vcd.c
index 04ace22..4f1a8a4 100644
--- a/vcd.c
+++ b/vcd.c
@@ -1,5 +1,6 @@
 #define NAPI_VERSION 1
 #include <stdio.h>
+#include <limits.h>
 #include <stdlib.h>
 #include "vcd_parser.h"
 #include <node_api.h>
@@ -135,6 +136,7 @@ METHOD(init) {
   state->tmpStr2 = tmpStr2;
   state->value = valueBuf;
   state->mask = maskBuf;
+  state->time = UINT64_MAX;
   state->digitCount = 0;
 
   napi_value status;
diff --git a/vcd_spans.c b/vcd_spans.c
index 185527b..8dcc38e 100644
--- a/vcd_spans.c
+++ b/vcd_spans.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include "vcd_parser.h"
 
 #ifndef VCDWASM
@@ -261,6 +262,17 @@ int onDigit(
 }
 
 int timeSpan(vcd_parser_t* state, const unsigned char* p, const unsigned char* endp) {
-  state->time = strtoul((const char *)p, (char **)&endp, 10);
+  int64_t time = strtoul((const char *)p, (char **)&endp, 10);
+  if (state->time == UINT64_MAX) {
+#ifndef VCDWASM
+    napi_env env = state->napi_env;
+    napi_value val;
+    ASSERT(val, napi_create_int32(env, time, &val))
+    ASSERT(state->info, napi_set_named_property(env, state->info, "t0", val))
+#else
+    set_property_int("t0", time);
+#endif
+  }
+  state->time = time;
   return 0;
 }
diff --git a/wasm_main.cpp b/wasm_main.cpp
index 27e8266..0975f23 100644
--- a/wasm_main.cpp
+++ b/wasm_main.cpp
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include <iostream>
 #include "vcd_parser.h"
 
@@ -87,7 +88,7 @@ int init(
   externalJsSetProperty* sfn,
   externalJsGetProperty* gfn
   ) {
-  
+
 
   state = (struct vcd_parser_s*) malloc(sizeof *state);
 
@@ -119,6 +120,7 @@ int init(
   state->value = valueBuf;
   state->mask = maskBuf;
   state->digitCount = 0;
+  state->time = UINT64_MAX;
 
   set_property_string("status", "declaration");
 
@@ -185,7 +187,7 @@ uint64_t getTime(const int context) {
 //   externalOne = f1;
 
 //   set_property_int("foo", 10);
-  
+
 
 //   int got = get_property_int("bar");
 
@@ -199,4 +201,4 @@ int main(void) {
 }
 
 
-} // extern C
\ No newline at end of file
+} // extern C