[PATCH AUTOSEL 6.1 15/15] verification/dot2: Improve dot parser robustness

Sasha Levin
2024-12-04T17:02:56Z

From: Gabriele Monaco <gmonaco@redhat.com>

[ Upstream commit 571f8b3f866a6d990a50fe5c89fe0ea78784d70b ]

This patch makes the dot parser used by dot2c and dot2k slightly more
robust, namely:
* allows parsing files with the gv extension (GraphViz)
* correctly parses edges with any indentation
* used to work only with a single character (e.g. '\t')
Additionally it fixes a couple of warnings reported by pylint such as
wrong indentation and comparison to False instead of `not ...`

Link: https://lore.kernel.org/20241017064238.41394-2-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/verification/dot2/automata.py | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/tools/verification/dot2/automata.py b/tools/verification/dot2/automata.py
index baffeb960ff0b..bdeb98baa8b06 100644
--- a/tools/verification/dot2/automata.py
+++ b/tools/verification/dot2/automata.py
@@ -29,11 +29,11 @@ class Automata:

def __get_model_name(self):
basename = ntpath.basename(self.__dot_path)
- if basename.endswith(".dot") == False:
+ if not basename.endswith(".dot") and not basename.endswith(".gv"):
print("not a dot file")
raise Exception("not a dot file: %s" % self.__dot_path)

- model_name = basename[0:-4]
+ model_name = ntpath.splitext(basename)[0]
if model_name.__len__() == 0:
raise Exception("not a dot file: %s" % self.__dot_path)

@@ -68,9 +68,9 @@ class Automata:
def __get_cursor_begin_events(self):
cursor = 0
while self.__dot_lines[cursor].split()[0] != "{node":
- cursor += 1
+ cursor += 1
while self.__dot_lines[cursor].split()[0] == "{node":
- cursor += 1
+ cursor += 1
# skip initial state transition
cursor += 1
return cursor
@@ -94,11 +94,11 @@ class Automata:
initial_state = state[7:]
else:
states.append(state)
- if self.__dot_lines[cursor].__contains__("doublecircle") == True:
+ if "doublecircle" in self.__dot_lines[cursor]:
final_states.append(state)
has_final_states = True

- if self.__dot_lines[cursor].__contains__("ellipse") == True:
+ if "ellipse" in self.__dot_lines[cursor]:
final_states.append(state)
has_final_states = True

@@ -110,7 +110,7 @@ class Automata:
# Insert the initial state at the bein og the states
states.insert(0, initial_state)

- if has_final_states == False:
+ if not has_final_states:
final_states.append(initial_state)

return states, initial_state, final_states
@@ -120,7 +120,7 @@ class Automata:
cursor = self.__get_cursor_begin_events()

events = []
- while self.__dot_lines[cursor][1] == '"':
+ while self.__dot_lines[cursor].lstrip()[0] == '"':
# transitions have the format:
# "all_fired" -> "both_fired" [ label = "disable_irq" ];
# ------------ event is here ------------^^^^^
@@ -161,7 +161,7 @@ class Automata:
# and we are back! Let's fill the matrix
cursor = self.__get_cursor_begin_events()

- while self.__dot_lines[cursor][1] == '"':
+ while self.__dot_lines[cursor].lstrip()[0] == '"':
if self.__dot_lines[cursor].split()[1] == "->":
line = self.__dot_lines[cursor].split()
origin_state = line[0].replace('"','').replace(',','_')
--
2.43.0