Copyright - Yehowshua Immanuel

A High performance, VCD Parser written in Rust

x/z value parsing currently fails in cargo test.

A fix is coming.

Current Features

• pretty fast, parses 3.04 GB VCD file in ~62s on M1 Macbook Air.

Current Limitations

Unable to handle VCD files that have signals with more than 2^32 - 1 = 4,294,967,295 deltas/changes.

Running

This repository comes with several smaller VCD files emitted from various EDA tools. If you want a larger VCD file, grab one from here.

The first build of the program may take some time.

cargo run --release test-vcd-files/aldec/SPI_Write.vcd

You can run all the tests with cargo test

TODO

Features

• handle signals with x or z as string - the one bit parsers may also need to handle string
• move parse_orphaned_vars to scopes.rs
• Print out git commit or release number.
• Should be able to load waveform whilst viewing it live. - could be quite challenging to implement for various reasons
• Take a look at GTKWave parser to compare efficiency.
• re-order all signal timelines as binary balanced trees with respect to timestamps - support multithreaded re-ordering

Repairs

• make a custom date parser for possibly up to 18 different versions(that is, for each possible tool).
• Consolidate error messages and add cursors throughout.
• Fix warnings especially usage and restriction warnings once I'm able to successfully parse all sample VCDs.

Code Consistency

• Change error messages to line and filenames. Go through all calls to format! whilst also keeping performance in mind.

Marketing

• Send survey to community channel.