Liberty-io is a Rust crate for parsing and writing the 'liberty' format which is used for characterizing the timing behaviour of digital CMOS standard-cells.
Since liberty files can be huge (up to gigabytes) this parser does not require to load the full file into memory but streams it from the disk.
Read a liberty file: ```rust use liberty_io; use std::fs::File; use std::io::BufReader;
// Create a buffered reader for faster reading. let f = File::open("./tests/data/freepdk45/gscl45nm.lib").expect("Failed to open file."); let mut buf = BufReader::new(f);
// Read the file. let readresult = libertyio::readlibertybytes(&mut buf);
// Abort the program if the library could not be read. let librarygroup = readresult.expect("Failed to read library!");
// Access the content. asserteq!(&librarygroup.name, "library"); asserteq!(&librarygroup.arguments[0].to_string(), "gscl45nm");
// List all cell names. (There's only DFFNEGX1 in the provided example file.)
println!("Library cells:");
for group in &library_group.groups {
if group.name == "cell" {
println!("* {}", &group.arguments[0]);
}
}
// There's some utility functions for accessing the library structure. // Find a cell group by it's name. let dffnegx1 = libertyio::util::findcell(&librarygroup, "DFFNEGX1"); assert!(dffnegx1.issome());