mirror of
https://github.com/annoyatron255/yosys4gal.git
synced 2024-12-23 02:52:24 +00:00
68 lines
1.7 KiB
Rust
68 lines
1.7 KiB
Rust
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use regex::Regex;
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use std::collections::HashMap;
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pub struct PcfFile {
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map: HashMap<String, u32>,
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}
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pub fn parse_pcf(input: &str) -> PcfFile {
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let mut pcf = HashMap::new();
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let re = Regex::new(r"(?m)^set_io (\S+) (\d+)$").unwrap();
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// we run a captures on it.
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for (_, [name, pin]) in re.captures_iter(input).map(|c| c.extract()) {
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if pcf.contains_key(name) {
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panic!("name collision in pcf file");
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}
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let num: u32 = str::parse(pin).unwrap();
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pcf.insert(name.to_string(), num);
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}
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PcfFile { map: pcf }
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}
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impl PcfFile {
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pub fn pin(&self, name: &str) -> Option<u32> {
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self.map.get(name).cloned()
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}
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pub fn pinvec(&self, name: &str, index: usize) -> Option<u32> {
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// construct a name of the form <name>[<index>]
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let realname = format!("{name}[{index}]");
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self.map.get(&realname).cloned()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_basic() {
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let test_str = "set_io pinName 1";
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let name_expected = "pinName";
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let pin_expected = 1;
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let f = parse_pcf(test_str);
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assert_eq!(f.pin(name_expected), Some(pin_expected));
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assert_eq!(f.pin("invalid"), None);
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}
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#[test]
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fn test_pins() {
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let test = "
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set_io scalar 1
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set_io vec[0] 2
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set_io vec[1] 3";
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let f = parse_pcf(test);
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assert_eq!(f.pin("scalar"), Some(1));
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assert_eq!(f.pinvec("vec", 0), Some(2));
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assert_eq!(f.pinvec("vec", 1), Some(3));
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assert_eq!(f.pinvec("vec", 2), None);
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}
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#[test]
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#[should_panic]
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fn test_name_collision() {
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let test = "
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set_io scalar 1
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set_io scalar 2";
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parse_pcf(test);
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}
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}
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