now running much faster, but due for refactor
This commit is contained in:
Yehowshua Immanuel
parent
b86e5fd3e4
commit
a7d2b11998
3 changed files with 267 additions and 157 deletions
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@ -1,18 +1,26 @@
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//! part of the vcd parser that handles parsing the signal tree and
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//! building the resulting signal tree
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use core::time;
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use super::*;
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#[derive(Debug)]
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pub(super) enum BinaryParserErrTypes {XValue, ZValue, UValue, OtherValue(char), TooLong}
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pub(super) enum BinaryParserErrTypes {
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XValue,
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ZValue,
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UValue,
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OtherValue(char),
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TooLong,
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}
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// We build a quick and not so dirty bit string parser.
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fn base2_str_to_byte(word : &[u8]) -> Result<u8, BinaryParserErrTypes> {
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fn base2_str_to_byte(word: &[u8]) -> Result<u8, BinaryParserErrTypes> {
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let mut val = 0u8;
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// shouldn't have more than 8 chars in str
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let len = word.len();
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if len > 8 {
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return Err(BinaryParserErrTypes::TooLong)
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return Err(BinaryParserErrTypes::TooLong);
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}
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let bit_lut = [
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@ -23,89 +31,93 @@ fn base2_str_to_byte(word : &[u8]) -> Result<u8, BinaryParserErrTypes> {
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0b0001_0000u8,
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0b0010_0000u8,
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0b0100_0000u8,
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0b1000_0000u8
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0b1000_0000u8,
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];
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for (idx, chr) in word.iter().rev().enumerate() {
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match chr {
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b'1' => {val = bit_lut[idx] | val}
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b'1' => val = bit_lut[idx] | val,
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b'0' => {}
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b'x' | b'X' => {return Err(BinaryParserErrTypes::XValue)}
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b'z' | b'Z' => {return Err(BinaryParserErrTypes::ZValue)}
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b'u' | b'U' => {return Err(BinaryParserErrTypes::UValue)}
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_ => {return Err(BinaryParserErrTypes::OtherValue(*chr as char))}
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b'x' | b'X' => return Err(BinaryParserErrTypes::XValue),
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b'z' | b'Z' => return Err(BinaryParserErrTypes::ZValue),
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b'u' | b'U' => return Err(BinaryParserErrTypes::UValue),
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_ => return Err(BinaryParserErrTypes::OtherValue(*chr as char)),
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}
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}
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Ok(val)
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}
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fn binary_str_to_vec_u8(binary_str : &str) -> Result<Vec<u8>, BinaryParserErrTypes> {
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let mut vec_u8 : Vec<u8> = Vec::new();
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fn binary_str_to_vec_u8(binary_str: &str) -> Result<Vec<u8>, BinaryParserErrTypes> {
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let mut vec_u8: Vec<u8> = Vec::new();
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let binary_str_as_bytes = binary_str.as_bytes();
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let mut tail_idx = binary_str_as_bytes.len();
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// clamp head if provided binary str is less than 8 long
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let mut head_idx =
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if tail_idx >= 8
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{binary_str_as_bytes.len() - 8}
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else
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{0};
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let mut head_idx = if tail_idx >= 8 {
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binary_str_as_bytes.len() - 8
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} else {
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0
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};
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while tail_idx > 0 {
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let curr_b_val = &binary_str_as_bytes[head_idx..tail_idx];
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let val_u8 = base2_str_to_byte(curr_b_val)?;
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vec_u8.push(val_u8);
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if head_idx < 8 {
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head_idx = 0
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}
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else {
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} else {
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head_idx = head_idx - 8;
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}
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if tail_idx < 8 {
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tail_idx = 0
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}
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else {
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} else {
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tail_idx = tail_idx - 8;
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}
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}
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Ok(vec_u8)
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}
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pub(super) fn parse_events<'a>(
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word_reader : &mut WordReader,
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vcd : &'a mut VCD,
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signal_map : &mut HashMap<String, SignalIdx>
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word_reader: &mut WordReader,
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vcd: &'a mut VCD,
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signal_map: &mut HashMap<String, SignalIdx>,
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) -> Result<(), String> {
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// let hash_time = std::time::Duration::ZERO;
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// let hash_time = std::time::Duration::ZERO;
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loop {
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let next_word = word_reader.next_word();
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// The following is the only case where eof is not an error.
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// If we've reached the end of the file, then there is obviously
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// nothing left to do...
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if next_word.is_err() {break};
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if next_word.is_err() {
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break;
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};
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let (word, cursor) = next_word.unwrap();
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let Cursor(Line(_), Word(word_in_line_idx)) = cursor;
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// we only want to match on the first word in a line
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if word_in_line_idx != 1 {continue}
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if word_in_line_idx != 1 {
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continue;
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}
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match &word[0..1] {
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"$" => {}
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"#" => {
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let value = &word[1..];
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let (f, l )= (file!(), line!());
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let (f, l) = (file!(), line!());
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let value = BigInt::parse_bytes(value.as_bytes(), 10).ok_or(
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format!("Error near {f}:{l}. Failed to parse {value} as BigInt at {cursor:?}").as_str())?;
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format!("Error near {f}:{l}. Failed to parse {value} as BigInt at {cursor:?}")
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.as_str(),
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)?;
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let (_, mut value) = value.to_bytes_le();
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// TODO : u32 helps with less memory, but should ideally likely be
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// configurable.
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let (f, l )= (file!(), line!());
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let start_idx = u32::try_from(vcd.timeline.len()).map_err(
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|_| format!("Error near {f}:{l}. Failed to convert from usize to u32."))?;
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// TODO : u32 helps with less memory, but should ideally likely be
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// configurable.
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let (f, l) = (file!(), line!());
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let start_idx = u32::try_from(vcd.timeline.len()).map_err(|_| {
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format!("Error near {f}:{l}. Failed to convert from usize to u32.")
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})?;
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vcd.timeline_markers.push(StartIdx(start_idx));
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vcd.timeline.append(&mut value);
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}
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@ -115,50 +127,55 @@ pub(super) fn parse_events<'a>(
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let binary_value = &word[1..];
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let observed_num_bits = binary_value.len();
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let mut value_u8 : Vec<u8> = Vec::new();
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let mut value_u8: Vec<u8> = Vec::new();
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let mut value_string = String::new();
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let mut store_as_string = false;
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// If we encounter x or z in a value, we can recover from
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// the error and store the value as a string.
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// Or else, we we propagate up other errors.
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match binary_str_to_vec_u8(binary_value) {
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Ok(result) => {value_u8 = result;}
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Err(BinaryParserErrTypes::XValue |
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BinaryParserErrTypes::ZValue |
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BinaryParserErrTypes::UValue
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) =>
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{
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store_as_string = true;
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value_string = binary_value.to_string();
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}
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Ok(result) => {
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value_u8 = result;
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}
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Err(
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BinaryParserErrTypes::XValue
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| BinaryParserErrTypes::ZValue
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| BinaryParserErrTypes::UValue,
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) => {
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store_as_string = true;
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value_string = binary_value.to_string();
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}
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Err(e) => {
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let (f, l )= (file!(), line!());
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Err(e).map_err(
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|e| format!("Error near {f}:{l}. Error {e:?} at {cursor:?}."))?;
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let (f, l) = (file!(), line!());
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Err(e).map_err(|e| {
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format!("Error near {f}:{l}. Error {e:?} at {cursor:?}.")
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})?;
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}
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}
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// this word should be the signal alias
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let (word, cursor) = word_reader.next_word().unwrap();
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// lookup signal idx
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let (f, l )= (file!(), line!());
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let SignalIdx(ref signal_idx) = signal_map.get(word).ok_or(
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format!("Error near {f}:{l}. Failed to lookup signal {word} at {cursor:?}"))?;
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let SignalIdx(ref signal_idx) = signal_map.get(word).ok_or(()).map_err(|_| {
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format!(
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"Error near {}:{}. Failed to lookup signal {word} at {cursor:?}",
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file!(),
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line!()
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)
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})?;
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// account for fact that signal idx could be an alias, so there
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// could be one step of indirection
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let signal_idx =
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{
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let signal_idx = {
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let signal = vcd.all_signals.get(*signal_idx).unwrap();
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match signal {
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Signal::Data {..} => {*signal_idx}
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Signal::Alias {signal_alias, ..} => {
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Signal::Data { .. } => *signal_idx,
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Signal::Alias { signal_alias, .. } => {
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let SignalIdx(ref signal_idx) = signal_alias;
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signal_idx.clone()
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}
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}
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};
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@ -167,11 +184,20 @@ pub(super) fn parse_events<'a>(
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// of the signal signal_idx references
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let signal = vcd.all_signals.get_mut(signal_idx).unwrap();
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match signal {
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Signal::Data {name, sig_type, ref mut signal_error, num_bits,
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u8_timeline, u8_timeline_markers, string_timeline,
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string_timeline_markers, ..} => {
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if signal_error.is_some() {continue;}
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Signal::Data {
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name,
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sig_type,
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ref mut signal_error,
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num_bits,
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u8_timeline,
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u8_timeline_markers,
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string_timeline,
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string_timeline_markers,
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..
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} => {
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if signal_error.is_some() {
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continue;
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}
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// Get the observed number of bits for the value parsed earlier
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// and verify that it is not greater than the numbits declared
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@ -193,39 +219,40 @@ pub(super) fn parse_events<'a>(
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}
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None => {
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let (f, l) = (file!(), line!());
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let msg = format!("\
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let msg = format!(
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"\
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Error near {f}:{l}. The bitwidth for signal {name} \
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must be specified for a signal of type {sig_type:?}. \
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This error occurred while parsing the vcd file at \
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{cursor:?}");
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{cursor:?}"
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);
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Err(msg)?;
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}
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};
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let (f, l )= (file!(), line!());
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let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(
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|_| format!("Error near {f}:{l}. Failed to convert from usize to u32."))?;
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let (f, l) = (file!(), line!());
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let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(|_| {
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format!("Error near {f}:{l}. Failed to convert from usize to u32.")
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})?;
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let timeline_idx = TimelineIdx(timeline_idx);
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if store_as_string {
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string_timeline_markers.push(timeline_idx);
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string_timeline.push(value_string);
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Ok(())
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}
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else {
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} else {
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u8_timeline_markers.push(timeline_idx);
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let mut curr_num_bytes = value_u8.len();
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u8_timeline.append(&mut value_u8);
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// we may need to zero extend values
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// we may need to zero extend values
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// so that we end up storing all values
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// of a particular signal in a consistent
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// amount of bytes
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let num_bits = num_bits.unwrap();
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let bytes_required = (num_bits / 8) +
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if (num_bits % 8) > 0 {1} else {0};
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let bytes_required =
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(num_bits / 8) + if (num_bits % 8) > 0 { 1 } else { 0 };
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while curr_num_bytes < bytes_required {
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// useful for debugging
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@ -243,8 +270,8 @@ pub(super) fn parse_events<'a>(
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Ok(())
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}
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}
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Signal::Alias {..} => {
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let (f, l )= (file!(), line!());
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Signal::Alias { .. } => {
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let (f, l) = (file!(), line!());
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let msg = format!(
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"Error near {f}:{l}, a signal alias should not point to a signal alias.\n\
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This error occurred while parsing vcd file at {cursor:?}");
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@ -257,21 +284,24 @@ pub(super) fn parse_events<'a>(
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"0" => {
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// lookup signal idx
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let hash = &word[1..];
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let (f, l )= (file!(), line!());
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let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(
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format!("Error near {f}:{l}. Failed to lookup signal {hash} at {cursor:?}"))?;
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let (f, l) = (file!(), line!());
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let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(()).map_err(|_| {
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format!(
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"Error near {}:{}. Failed to lookup signal {hash} at {cursor:?}",
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file!(),
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line!()
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)
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})?;
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// account for fact that signal idx could be an alias, so there
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// could be one step of indirection
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let signal_idx =
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{
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let signal_idx = {
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let signal = vcd.all_signals.get(*signal_idx).unwrap();
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match signal {
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Signal::Data {..} => {*signal_idx}
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Signal::Alias {signal_alias, ..} => {
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Signal::Data { .. } => *signal_idx,
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Signal::Alias { signal_alias, .. } => {
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let SignalIdx(ref signal_idx) = signal_alias;
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signal_idx.clone()
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}
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}
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};
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@ -280,11 +310,19 @@ pub(super) fn parse_events<'a>(
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// of the signal signal_idx references
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let signal = vcd.all_signals.get_mut(signal_idx).unwrap();
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match signal {
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Signal::Data {name, sig_type, ref mut signal_error, num_bits,
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u8_timeline, u8_timeline_markers, ..} => {
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Signal::Data {
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name,
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sig_type,
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ref mut signal_error,
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num_bits,
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u8_timeline,
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u8_timeline_markers,
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..
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} => {
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// if this is a bad signal, go ahead and skip it
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if signal_error.is_some() {continue;}
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if signal_error.is_some() {
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continue;
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}
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// Get bitwidth and verify that it is 1.
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// Also account for the error case of a bitwidth of `None`
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@ -292,38 +330,43 @@ pub(super) fn parse_events<'a>(
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Some(ref num_bits) => {
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if *num_bits != 1 {
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let (f, l) = (file!(), line!());
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let msg = format!("\
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let msg = format!(
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"\
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Error near {f}:{l}. The bitwidth for signal {name} \
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of sig_type {sig_type:?} is expected to be `1` not \
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`{num_bits}`. \
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This error occurred while parsing the vcd file at \
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{cursor:?}");
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{cursor:?}"
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);
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*signal_error = Some(msg);
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continue;
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}
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}
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None => {
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let (f, l) = (file!(), line!());
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let msg = format!("\
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let msg = format!(
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"\
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Error near {f}:{l}. The bitwidth for signal {name} \
|
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must be specified for a signal of type {sig_type:?}. \
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This error occurred while parsing the vcd file at \
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{cursor:?}");
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{cursor:?}"
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);
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Err(msg)?;
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}
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};
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let (f, l )= (file!(), line!());
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let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(
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|_| format!("Error near {f}:{l}. Failed to convert from usize to u32."))?;
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let (f, l) = (file!(), line!());
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let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(|_| {
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format!("Error near {f}:{l}. Failed to convert from usize to u32.")
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})?;
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let timeline_idx = TimelineIdx(timeline_idx);
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u8_timeline_markers.push(timeline_idx);
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u8_timeline.push(0u8);
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Ok(())
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}
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Signal::Alias {..} => {
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let (f, l )= (file!(), line!());
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Signal::Alias { .. } => {
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let (f, l) = (file!(), line!());
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let msg = format!(
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"Error near {f}:{l}, a signal alias should not point to a signal alias.\n\
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This error occurred while parsing vcd file at {cursor:?}");
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|
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@ -335,21 +378,23 @@ pub(super) fn parse_events<'a>(
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"1" => {
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// lokup signal idx
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let hash = &word[1..];
|
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let (f, l )= (file!(), line!());
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let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(
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format!("Error near {f}:{l}. Failed to lookup signal {hash} at {cursor:?}"))?;
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let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(()).map_err(|_| {
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format!(
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"Error near {}:{}. Failed to lookup signal {hash} at {cursor:?}",
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file!(),
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line!()
|
||||
)
|
||||
})?;
|
||||
|
||||
// account for fact that signal idx could be an alias, so there
|
||||
// could be one step of indirection
|
||||
let signal_idx =
|
||||
{
|
||||
let signal_idx = {
|
||||
let signal = vcd.all_signals.get(*signal_idx).unwrap();
|
||||
match signal {
|
||||
Signal::Data {..} => {*signal_idx}
|
||||
Signal::Alias {signal_alias, ..} => {
|
||||
Signal::Data { .. } => *signal_idx,
|
||||
Signal::Alias { signal_alias, .. } => {
|
||||
let SignalIdx(ref signal_idx) = signal_alias;
|
||||
signal_idx.clone()
|
||||
|
||||
}
|
||||
}
|
||||
};
|
||||
|
|
@ -358,11 +403,19 @@ pub(super) fn parse_events<'a>(
|
|||
// of the signal signal_idx references
|
||||
let signal = vcd.all_signals.get_mut(signal_idx).unwrap();
|
||||
match signal {
|
||||
Signal::Data {name, sig_type, ref mut signal_error, num_bits,
|
||||
u8_timeline, u8_timeline_markers, ..} => {
|
||||
|
||||
Signal::Data {
|
||||
name,
|
||||
sig_type,
|
||||
ref mut signal_error,
|
||||
num_bits,
|
||||
u8_timeline,
|
||||
u8_timeline_markers,
|
||||
..
|
||||
} => {
|
||||
// if this is a bad signal, go ahead and skip it
|
||||
if signal_error.is_some() {continue;}
|
||||
if signal_error.is_some() {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Get bitwidth and verify that it is 1.
|
||||
// Also account for the error case of a bitwidth of `None`
|
||||
|
|
@ -370,38 +423,43 @@ pub(super) fn parse_events<'a>(
|
|||
Some(ref num_bits) => {
|
||||
if *num_bits != 1 {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!("\
|
||||
let msg = format!(
|
||||
"\
|
||||
Error near {f}:{l}. The bitwidth for signal {name} \
|
||||
of sig_type {sig_type:?} is expected to be `1` not \
|
||||
`{num_bits}`. \
|
||||
This error occurred while parsing the vcd file at \
|
||||
{cursor:?}");
|
||||
{cursor:?}"
|
||||
);
|
||||
*signal_error = Some(msg);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
None => {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!("\
|
||||
let msg = format!(
|
||||
"\
|
||||
Error near {f}:{l}. The bitwidth for signal {name} \
|
||||
must be specified for a signal of type {sig_type:?}. \
|
||||
This error occurred while parsing the vcd file at \
|
||||
{cursor:?}");
|
||||
{cursor:?}"
|
||||
);
|
||||
Err(msg)?;
|
||||
}
|
||||
};
|
||||
|
||||
let (f, l )= (file!(), line!());
|
||||
let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(
|
||||
|_| format!("Error near {f}:{l}. Failed to convert from usize to u32."))?;
|
||||
let (f, l) = (file!(), line!());
|
||||
let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(|_| {
|
||||
format!("Error near {f}:{l}. Failed to convert from usize to u32.")
|
||||
})?;
|
||||
let timeline_idx = TimelineIdx(timeline_idx);
|
||||
|
||||
u8_timeline_markers.push(timeline_idx);
|
||||
u8_timeline.push(1u8);
|
||||
Ok(())
|
||||
}
|
||||
Signal::Alias {..} => {
|
||||
let (f, l )= (file!(), line!());
|
||||
Signal::Alias { .. } => {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!(
|
||||
"Error near {f}:{l}, a signal alias should not point to a signal alias.\n\
|
||||
This error occurred while parsing vcd file at {cursor:?}");
|
||||
|
|
@ -414,21 +472,23 @@ pub(super) fn parse_events<'a>(
|
|||
let val = word.to_string();
|
||||
// lokup signal idx
|
||||
let hash = &word[1..];
|
||||
let (f, l )= (file!(), line!());
|
||||
let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(
|
||||
format!("Error near {f}:{l}. Failed to lookup signal {hash} at {cursor:?}"))?;
|
||||
let SignalIdx(ref signal_idx) = signal_map.get(hash).ok_or(()).map_err(|_| {
|
||||
format!(
|
||||
"Error near {}:{}. Failed to lookup signal {hash} at {cursor:?}",
|
||||
file!(),
|
||||
line!()
|
||||
)
|
||||
})?;
|
||||
|
||||
// account for fact that signal idx could be an alias, so there
|
||||
// could be one step of indirection
|
||||
let signal_idx =
|
||||
{
|
||||
let signal_idx = {
|
||||
let signal = vcd.all_signals.get(*signal_idx).unwrap();
|
||||
match signal {
|
||||
Signal::Data {..} => {*signal_idx}
|
||||
Signal::Alias {signal_alias, ..} => {
|
||||
Signal::Data { .. } => *signal_idx,
|
||||
Signal::Alias { signal_alias, .. } => {
|
||||
let SignalIdx(ref signal_idx) = signal_alias;
|
||||
signal_idx.clone()
|
||||
|
||||
}
|
||||
}
|
||||
};
|
||||
|
|
@ -437,11 +497,19 @@ pub(super) fn parse_events<'a>(
|
|||
// of the signal signal_idx references
|
||||
let signal = vcd.all_signals.get_mut(signal_idx).unwrap();
|
||||
match signal {
|
||||
Signal::Data {name, sig_type, ref mut signal_error, num_bits,
|
||||
string_timeline, string_timeline_markers, ..} => {
|
||||
|
||||
Signal::Data {
|
||||
name,
|
||||
sig_type,
|
||||
ref mut signal_error,
|
||||
num_bits,
|
||||
string_timeline,
|
||||
string_timeline_markers,
|
||||
..
|
||||
} => {
|
||||
// if this is a bad signal, go ahead and skip it
|
||||
if signal_error.is_some() {continue;}
|
||||
if signal_error.is_some() {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Get bitwidth and verify that it is 1.
|
||||
// Also account for the error case of a bitwidth of `None`
|
||||
|
|
@ -449,38 +517,43 @@ pub(super) fn parse_events<'a>(
|
|||
Some(ref num_bits) => {
|
||||
if *num_bits != 1 {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!("\
|
||||
let msg = format!(
|
||||
"\
|
||||
Error near {f}:{l}. The bitwidth for signal {name} \
|
||||
of sig_type {sig_type:?} is expected to be `1` not \
|
||||
`{num_bits}`. \
|
||||
This error occurred while parsing the vcd file at \
|
||||
{cursor:?}");
|
||||
{cursor:?}"
|
||||
);
|
||||
*signal_error = Some(msg);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
None => {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!("\
|
||||
let msg = format!(
|
||||
"\
|
||||
Error near {f}:{l}. The bitwidth for signal {name} \
|
||||
must be specified for a signal of type {sig_type:?}. \
|
||||
This error occurred while parsing the vcd file at \
|
||||
{cursor:?}");
|
||||
{cursor:?}"
|
||||
);
|
||||
Err(msg)?;
|
||||
}
|
||||
};
|
||||
|
||||
let (f, l )= (file!(), line!());
|
||||
let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(
|
||||
|_| format!("Error near {f}:{l}. Failed to convert from usize to u32."))?;
|
||||
let (f, l) = (file!(), line!());
|
||||
let timeline_idx = u32::try_from(vcd.timeline.len()).map_err(|_| {
|
||||
format!("Error near {f}:{l}. Failed to convert from usize to u32.")
|
||||
})?;
|
||||
let timeline_idx = TimelineIdx(timeline_idx);
|
||||
|
||||
string_timeline_markers.push(timeline_idx);
|
||||
string_timeline.push(val);
|
||||
Ok(())
|
||||
}
|
||||
Signal::Alias {..} => {
|
||||
let (f, l )= (file!(), line!());
|
||||
Signal::Alias { .. } => {
|
||||
let (f, l) = (file!(), line!());
|
||||
let msg = format!(
|
||||
"Error near {f}:{l}, a signal alias should not point to a signal alias.\n\
|
||||
This error occurred while parsing vcd file at {cursor:?}");
|
||||
|
|
@ -494,4 +567,4 @@ pub(super) fn parse_events<'a>(
|
|||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue