A Rust VCD parser intended to be the backend of a Waveform Viewer(built using egui) that supports dynamically loaded rust plugins.
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2022-05-31 17:50:46 -04:00
src now parsing timelines with nom 2022-05-31 17:50:46 -04:00
test-vcd-files test VCD files 2022-05-02 22:38:24 -04:00
.gitignore first commit 2022-04-14 00:50:37 -04:00
Cargo.toml now parsing timelines with nom 2022-05-31 17:50:46 -04:00
README.md first commit 2022-04-14 00:50:37 -04:00

The Beginnings of a high-performance, low memory footprint VCD Viewer in Rust for massive multi-GB waveforms

Features

  • very fast
  • loads 200MB of VCD waveform per second on an 8 core 2017 desktop CPU with NVMe storage
  • consumes roughly between 10 - 50MB of memory per GB of waveform
  • elegant/pretty UI
  • can be easily ported to work in browser via webassembly
  • allows high-performance custom Rust plugins to manipulate and generate new waveforms live

Running

Make sure you have a test vcd file to get you started. You can grab a large VCD file from here.

The first build of the program may take some time.

cargo run --release -- path/to/vcd/file

TODO

  • Test positions with seeking
  • vcd should be argument
  • structure to store stream position against timestamp as string
  • structure to store stream position against timestamp as BigInt

April 14

  • store timestamps to struct
  • Get file loading status
  • Get all signal scopes

April 15

  • Re-factor to support hooks in the initial file ingest
  • Modularize

April 15

  • Build tree per signal.
  • Each signal also comes with a value change buffer to avoid frequent disk readouts.

VCD Spec Questions

  • I'm pretty sure that only one statement per line is allowed.