Non stream mode required

[raczben]

I like this stream reader behavior, but it is overkill when the whole file is available. I just want a method, which gives back the fully parsed file, with all of the value changes.

I need a similar behavior to this, (just, that has some bug...)

[drom]

You can totally feed this parser with a single chunk. That will make it non-streaming. Example: https://github.com/wavedrom/vcd/blob/master/test/basic.js#L44 About ALL value changes. How would you imagine the result data structure that you want to see?

[raczben]

That example does not checks the value changes...

Let's see this example:

'use strict';

const vcd = require('vcd-stream');

const inst = vcd.parser();
inst.on("$enddefinitions", () => {
console.log(inst.info.wires)
// {
  // top: { clock: '"}G', leaf: { counter: '{u' }, fruit: { point: 'u)' } }
// }

});

inst.change.on('"}G', (time, cmd) => {
    console.log(`change: "}G  @${time}  cmd: ${cmd}`)  // < < < < < < What is the meaning of cmd?
});
inst.change.on('u)', (time, cmd) => {
    console.log(`change: u)  @${time}  cmd: ${cmd}`)
});
inst.change.on('{u', (time, cmd) => {
    console.log(`change: {u  @${time}  cmd: ${cmd}`)
});

inst.write(`
$version Generated by VerilatedVcd $end
$date Wed Sep 18 22:59:07 2019
 $end
$timescale   1ns $end

  $scope   module   top    $end
    $var wire  1 "}G clock $end
    $scope module leaf $end
      $var wire 64 {u counter [63:0] $end
    $upscope $end
    $scope module fruit $end
      $var wire 4 u) point [3:0] $end
    $upscope $end
  $upscope $end

  $enddefinitions $end
`
);

inst.write(`
#1
0"}G
#2
1"}G
#300
0"}G
b1111000000000000 {u
#301
b0000111100000000 {u
#302
b0000000011110000 {u
#303
b0000000000001111 {u
`
);

This prints out:

{
  top: { clock: '"}G', leaf: { counter: '{u' }, fruit: { point: 'u)' } }
}
change: "}G  @1  cmd: 14
change: "}G  @2  cmd: 15
change: "}G  @300  cmd: 14
change: {u  @300  cmd: 19
change: {u  @301  cmd: 19
change: {u  @302  cmd: 19
change: {u  @303  cmd: 19

What is the meaning of cmd? Where is the new value?

[drom]

cmd is enum: https://github.com/wavedrom/vcd/blob/master/bin/build.js#L87

{
  14: 0,
  15: 1,
  19: binary string starts with `b`
}

[drom]

I like this stream reader behavior, but it is overkill when the whole file is available. I just want a method, which gives back the fully parsed file, with all of the value changes.

I need a similar behavior to this, (just, that has some bug...)

The format from from ahmed-agiza/vcd-parser is very verbose and will eat all memory very quickly. Maybe we should come up with a better format?

[drom]

I think we have to discuss the format of the data on cmd=19, 20 here https://github.com/wavedrom/vcd/issues/16