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#!/usr/bin/env python3
import sys
import argparse
class Parser:
"Parser for files with IF_XYZ(A|B) constructs"
def __init__(self, switches):
self.mSwitches = switches
def Switches(self):
"outputs the switches used by parser"
return self.mSwitches
def SetSwitch(self, key, val):
"Set or add a (key,val) switch"
self.mSwitches[key] = val
def ParseSingleIf(self, string, switch):
"""
switch should be a tuple (key, val)
ParseSingleIf(string, switch) will replace in string the
first occurrence of IF_key(A|B) with A if val = True;
B if val = False
"""
init = string.find("IF_" + switch[0])
start = init
end = len(string)
mark = end
counter = 0
ind = start
# determine the correct location for '|'
for cc in string[init:]:
if cc == "(":
if counter == 0:
start = ind
counter += 1
elif cc == ")":
counter -= 1
if counter == 0:
end = ind
break
elif cc == "|" and counter == 1:
mark = ind
ind += 1
# resolve the option
if switch[1]:
result = (
string[0:init]
+ string[start + 1 : mark]
+ string[end + 1 : len(string)]
)
else:
result = (
string[0:init] + string[mark + 1 : end] + string[end + 1 : len(string)]
)
return result
def ParseIf(self, string, switch):
"""
ParseIf(string, switch) will replace in string recursively
occurance of IF_key(A|B) statements with A if val = True;
B if val = False
"""
result = string
while result.find("IF_" + switch[0]) > -1:
result = self.ParseSingleIf(result, switch)
return result
def ParseString(self, string):
"""
ParseString(string) will parse in string recursively
all of IF_key(A|B) statements for all (key, val) pairs
in dictionary self.mSwitches
"""
result = string
for switch in self.mSwitches.items():
result = self.ParseIf(result, switch)
return result
def ParseDocument(self, input_file, output_file):
"""
ParseDocument(input_file, output_fiel) will replace recursively
all of IF_key(A|B) statements for all (key, val) pairs
in dictionary self.mSwitches in the input_file stream and output
to the output_file stream.
"""
output = []
for line in input_file:
output.append(self.ParseString(line))
if input_file == output_file:
output_file.seek(0)
output_file.truncate()
# write to the same file
for line in output:
output_file.write(line)
# ------------------------------------------------------------------------
# main program
# ------------------------------------------------------------------------
if __name__ == "__main__":
argparser = argparse.ArgumentParser(
description="Resolve IF_*() macros based on given tags"
)
argparser.add_argument(
"-f",
"--file",
metavar="FILENAME",
type=str,
help="read from given file instead of stdin",
)
argparser.add_argument(
"-i",
"--inplace",
action="store_true",
help="do in-place replacement for the given file instead of echo to stdout",
)
argparser.add_argument("--selftest", action="store_true", help="run self test")
argparser.add_argument(
"flags",
metavar="FLAG",
type=str,
nargs="*",
help="specified flags are set to true",
)
args = argparser.parse_args()
# default list of switches used by the parser
switches = {
"MPI": False,
"CUDA": False,
"HIP": False,
"OPENCL": False,
"WARNALL": False,
"DEBUG": False,
"ASAN": False,
"STATIC": False,
"VALGRIND": False,
"COVERAGE": False,
}
parser = Parser(switches)
# set the list of switches given on the command line to True
for flag in args.flags:
parser.SetSwitch(flag, True)
if args.selftest:
sys.exit(0) # TODO implement selftest
# do parsing
if not args.file:
parser.ParseDocument(sys.stdin, sys.stdout)
else:
if args.inplace:
with open(args.file, mode="r+") as fhandle:
parser.ParseDocument(fhandle, fhandle)
else:
with open(args.file, mode="r") as fhandle:
parser.ParseDocument(fhandle, sys.stdout)
|
