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SVParParser.py
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import io
import re
import warnings
import numpy as np
import pandas as pd
from tabulate import tabulate
from prettytable import PrettyTable
class SVParParser:
def __init__(self, filepath: str):
self.filepath = filepath
self.head_signal_typ = []
self.head_signal_d_t = []
self.head_signal_n_r = []
self.head_signal_v_w = []
self.head_signal_nam = []
self.head_signal_arr = []
self.head_signal_clk = []
self.head_signal_rst = []
def head_parse(self):
with open(self.filepath, "r") as input_file:
for line in input_file:
signal_type = ["input", "output"]
for st in signal_type:
if( st in line):
self.head_signal_typ.append(st)
signal_str_default = re.search('(.*)\n', line).group(1)
signal_str = signal_str_default
signal_str = re.search(st + '(.*)', signal_str_default).group(1)
signal_str = re.sub(',', '', re.sub('\s', '', signal_str))
data_type = ["reg", "wire", "integer", "real", "time", "realtime",
"logic", "bit", "byte", "shortint", "int", "longint", "shortreal"]
self.head_signal_d_t.append('')
for dt in data_type:
if (re.search(dt, line)):
signal_data_type = dt
self.head_signal_d_t[len(self.head_signal_d_t)-1] = signal_data_type
signal_str = re.search(dt + '(.*)', signal_str).group(1)
num_representation = ["signed", "unsigned"]
self.head_signal_n_r.append('')
for nr in num_representation:
if (re.search(nr, line)):
signal_num_representation = nr
self.head_signal_n_r[len(self.head_signal_n_r)-1] = signal_num_representation
signal_str = re.search(nr + '(.*)', signal_str).group(1)
signal_vector_width, signal_vector_width_c, flag_v_m = self.get_signal_v_w(signal_str)
self.head_signal_v_w.append(signal_vector_width)
if (flag_v_m):
signal_str = signal_str.replace(signal_vector_width_c, '', 1)
signal_array_size, signal_array_size_c, flag_arr = self.get_signal_arr(signal_str)
self.head_signal_arr.append(signal_array_size)
if (flag_arr):
signal_str = signal_str.replace(signal_array_size_c, '', 1)
signal_name = signal_str
self.head_signal_nam.append(signal_name)
signal_clk = ["clk", "CLK", "clock"]
self.head_signal_clk.append('')
for clk in signal_clk:
if (re.search(clk, signal_name)):
self.head_signal_clk[len(self.head_signal_clk)-1] = 'clk'
signal_rst = ["rst", "RST", "reset"]
self.head_signal_rst.append('')
for rst in signal_rst:
if (re.search(rst, signal_name)):
self.head_signal_rst[len(self.head_signal_rst)-1] = 'rst'
# extracting the width (measurement) of the signal
def get_signal_v_w(self, param_str: str):
param_ind_c = 0
if('[' in param_str):
if (re.search(r"\][^\[](.*)", param_str) and re.search(r"(.*)[^\]]\[", param_str)):
param_ind = (re.match(r"\[(.*)\][^\[]", param_str).group(1))
param_ind = '[' + param_ind + ']'
param_ind_c = param_ind
param_ind = self.convert_param_ind(param_ind)
flag = 1
elif(re.search(r"\][^\[](.*)", param_str)):
param_ind = (re.match(r"\[(.*)\]", param_str).group(0))
param_ind_c = param_ind
param_ind = self.convert_param_ind(param_ind)
flag = 1
else:
param_ind = [1]
flag = 0
else:
param_ind = [1]
flag = 0
return param_ind, param_ind_c, flag
# finding array dimension
def get_signal_arr(self, param_str: str):
param_ind_c = 0
if('[' in param_str):
if (re.search(r"\[(.*)\]", param_str)):
param_ind = (re.search(r"\[(.*)\]", param_str).group(1))
param_ind = '[' + param_ind + ']'
param_ind_c = param_ind
param_ind = self.convert_param_ind(param_ind)
flag = 1
else:
param_ind = [1]
flag = 0
else:
param_ind = [1]
flag = 0
return param_ind, param_ind_c, flag
# width conversion
def convert_param_ind(self, param_ind: str):
part = []
width = (param_ind.split("]["))
for n in range(len(width)):
width[n] = width[n].replace('[', '')
width[n] = width[n].replace(']', '')
for n in range(len(width)):
part.append(width[n].split(":"))
for n in range(len(part)):
if (len(part[n]) == 2):
if("+" in part[n][0]):
word = (part[n][0].split("+"))
summ = (1 + int(word[1]) - int(part[n][1]))
if(summ > 0):
word = word[0] + "+" + str(abs(summ))
elif(summ < 0):
word = word[0] + "-" + str(abs(summ))
else:
word = word[0]
elif("-" in part[n][0]):
word = (part[n][0].split("-"))
summ = (1 - int(word[1]) - int(part[n][1]))
if(summ > 0):
word = word[0] + "+" + str(abs(summ))
elif(summ < 0):
word = word[0] + "-" + str(abs(summ))
else:
word = word[0]
elif(part[n][0].isdigit()):
word = int(part[n][0]) - int(part[n][1]) + 1
else:
word = part[n][0] + "+" + str(1 - int(part[n][1]))
part[n] = word
elif (len(part[n]) == 1):
if(part[n][0].isdigit()):
word = int(part[n][0])
part[n] = word
return part
# txt file and terminal output
def parse_file_log(self):
with io.open("parser_log.txt", "w", encoding="utf-16") as f:
f.write("SVParParser log:\n")
def_head_params_str = '{} header defined signal(s) was(were) founded:\n'
f.write(def_head_params_str.format(str(len(self.head_signal_nam))))
head_signals = {'Signal\ntype' : self.head_signal_typ,
'Data\ntype' : self.head_signal_d_t,
'Number\nrepresentation': self.head_signal_n_r,
'Vector width' : self.head_signal_v_w,
'Name' : self.head_signal_nam,
'Array size' : self.head_signal_arr,
'Clock' : self.head_signal_clk,
'Reset' : self.head_signal_rst}
table_def_head_params = pd.DataFrame(head_signals)
f.write(str(tabulate(table_def_head_params, headers='keys', tablefmt='grid', stralign='center', numalign="center")) + '\n')
f.close()
if f.closed:
print('file is closed')
with io.open("parser_log.txt", "r", encoding="utf-16") as f:
print(f.read())
f.close()
if f.closed:
print('file is closed')