Add feature: Print breakpoint table

README.md

@@ -22,6 +22,7 @@ sootty "waveform.vcd" -o > image.svg
 
 with a Value Change Dump (VCD) or Extended VCD (EVCD) file to produce an svg waveform diagram. Optional arguments include:
 - `-b | --break FORMULA` Specify the formula for the points in time to be highlighted.
+- `--btable` Print the wire value table at breakpoints to `stdout` (`-b` is required).
 - `-e | --end FORMULA` Specify the end of the window.
 - `-h | --help` Show the help message and exit.
 - `-l | --length N` Specify the number of ticks in the window (mutually exclusive with `-e`).
@@ -57,6 +58,12 @@ Reloading a saved query:
 sootty -R "save.txt"
 ```
 
+Add breakpoints at time 9, 11, and 16 - 17 and print wire values at breakpoints:
+
+```bash
+sootty "example/example5.evcd" -b "time 9 || time 11 || after time 15 && before time 18" --btable
+```
+
 How to run in python (using the repl):
 
 ```python

example/example5.evcd

@@ -0,0 +1,67 @@
+$comment
+	File created using the following command:
+		vcd file opt3.evcd -dumpports
+$end
+$date
+	Sat Sep  3 13:11:39 2022
+$end
+$version
+	dumpports ModelSim Version 10.2c
+$end
+$timescale
+	1ps
+$end
+
+$scope module testbench $end
+
+$scope module pe8 $end
+$var port [7:0] <0 req $end
+$var port 1 <1 en $end
+$upscope $end
+
+$scope module pe4 $end
+$var port [3:0] <2 req $end
+$var port 1 <3 en $end
+$upscope $end
+$upscope $end
+$enddefinitions $end
+#0
+$dumpports
+pU 0 6 <1
+pU 0 6 <3
+pDDDDDDDD 66666666 00000000 <0 
+pDDDD 6666 0000 <2 
+$end
+#5
+pUDDDDDDD 06666666 60000000 <0 
+pUDDD 0666 6000 <2 
+#10
+pDDDUDDDD 66606666 00060000 <0 
+pDUDD 6066 0600 <2 
+#15
+pDDDDDUDD 66666066 00000600 <0 
+pDDUD 6606 0060 <2 
+#20
+pDDDDDDDU 66666660 00000006 <0 
+pDDDU 6660 0006 <2 
+#25
+pDUDUDUDU 60606060 06060606 <0 
+pDUDU 6060 0606 <2 
+#30
+pDUUDDUUD 60066006 06600660 <0 
+pDUUD 6006 0660 <2 
+#35
+pUUUDUUUD 00060006 66606660 <0 
+pUUUD 0006 6660 <2 
+#40
+pUUUUUUUU 00000000 66666666 <0 
+pUUUU 0000 6666 <2 
+#45
+pD 6 0 <3
+pD 6 0 <1
+#50
+pDUUDDUUD 60066006 06600660 <0 
+pDUUD 6006 0660 <2 
+$vcdclose
+#55
+$end

sootty/__main__.py

@@ -1,6 +1,5 @@
 import argparse
-import os
-import yaml
+import sys
 from sootty.exceptions import SoottyError
 from .save import save_query, reload_query
 from .storage import WireTrace
@@ -17,7 +16,7 @@ def parse_args():
         default=None,
         metavar="FILENAME",
         type=str,
-        help="input .vcd file (required unless -R flag is provided)",
+        help="input .vcd or .evcd file (required unless -R flag is provided)",
     )
     parser.add_argument(
         "-s",
@@ -41,13 +40,23 @@ def parse_args():
     parser.add_argument(
         "-b",
         "--break",
+        required='--btable' in sys.argv,
         type=str,
         metavar="FORMULA",
         dest="breakpoints",
         help="formula for the points in time to be highlighted",
     )
     parser.add_argument(
-        "-l", "--length", type=int, dest="length", help="number of cycles to display"
+        '--btable',
+        action="store_true",
+        help="print a breakpoint table to stdout",
+    )
+    parser.add_argument(
+        "-l",
+        "--length",
+        type=int,
+        dest="length",
+        help="number of cycles to display",
     )
     parser.add_argument(
         "-o",
@@ -102,6 +111,7 @@ def parse_args():
         args.filename,
         args.wires,
         args.breakpoints,
+        args.btable,
         args.length,
         args.start,
         args.end,
@@ -111,7 +121,7 @@ def parse_args():
 
 
 def main():
-    filename, wires, breakpoints, length, start, end, output, radix = parse_args()
+    filename, wires, breakpoints, btable, length, start, end, output, radix = parse_args()
 
     if filename is None:
         raise SoottyError("Input file is required. See --help for more info.")
@@ -161,10 +171,11 @@ def main():
 
     if not output:
         image.display()  # Show image in terminal (works in kitty, iterm)
-
     else:
         print(image.source)
 
+    if btable:
+        wiretrace.print_breakpoints(breakpoints)
 
 if __name__ == "__main__":
     main()

sootty/storage/valuechange.py

@@ -1,4 +1,3 @@
-import sys
 from vcd.reader import *
 from itertools import islice
 from sortedcontainers import SortedDict, SortedList, SortedSet

sootty/storage/wire.py

@@ -1,4 +1,3 @@
-import sys
 from itertools import compress, chain
 
 from ..exceptions import *

sootty/storage/wiregroup.py

@@ -1,5 +1,3 @@
-import sys
-
 from ..exceptions import *
 from .wire import Wire
 
@@ -46,3 +44,15 @@ def get_names(self):
         for group in self.groups:
             names.update(group.get_names())
         return names
+
+    def get_wires(self):
+        """Returns a dictionary of all wires of this wiregroup or a list if this wiregroup is the innermost one."""
+        if self.groups:
+            wires = dict()
+            if self.wires:
+                wires[self.name] = self.wires
+            for group in self.groups:
+                wires[group.name] = group.get_wires()
+        else:
+            wires = self.wires
+        return wires

sootty/storage/wiretrace.py

@@ -1,4 +1,4 @@
-import json, sys
+import sys
 from vcd.reader import *
 
 from ..exceptions import *
@@ -290,3 +290,23 @@ def compute_limits(self, start_expr: str, end_expr: str):
         ends = list(filter(lambda time: time > start, self.evaluate(end_expr)))
         end = ends[0] if len(ends) else self.length()
         return (start, end)
+
+    def print_breakpoints(self, breakpoints: list):
+        """
+        Print a table of wires and their values.
+        """
+        def rec_print(wires):
+            for scope, sub in wires.items():
+                if type(sub) is dict:
+                    print("scope\t" + scope)
+                    rec_print(sub)
+                else:  # is list
+                    print("scope\t" + scope)
+                    for wire in sub:
+                        print(wire.name, end="\t")
+                        for breakpoint in breakpoints:
+                            print(str(wire._data.get(breakpoint)), end="\t")
+                        print()
+
+        print("time", *breakpoints, sep="\t")
+        rec_print(self.root.get_wires())

sootty/utils.py

@@ -14,7 +14,7 @@ def dec2anybase(input, base, width):
             res += chr(rem + ord("0"))
         else:
             res += chr(rem - 10 + ord("A"))
-        input = int(input / base)
+        input = input // base
 
     return res[::-1].zfill(ceil(log(2**width - 1, base)))
 
@@ -129,12 +129,12 @@ def evcd2vcd(stream):
         while True:
             # Basic formatter and syntax checker
             if tok == b'$comment' or tok == b'$date' or tok == b'$timescale' or tok == b'$version':
-                vcd.write(tok + b' ')
+                vcd.write(tok + b'\n   ')
                 body = next(tokit)
                 while body != b'$end':
-                    vcd.write(body + b' ')
+                    vcd.write(b' ' + body)
                     body = next(tokit)
-                vcd.write(b'$end\n')  # body + \n
+                vcd.write(b'\n$end\n')  # body + \n
                 tok = next(tokit)
             elif tok == b'$enddefinitions':
                 if next(tokit) != b'$end':

sootty/visualizer.py

@@ -1,4 +1,4 @@
-import sys, html
+import html
 from enum import Enum
 
 from .display import VectorImage