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import os
import sys
import argparse
import string
import subprocess
from random import randrange, choice, shuffle
INT_MIN = -2147483648
INT_MAX = 2147483647
UINT_MAX = 4294967295
CHAR_MIN = -128
CHAR_MAX = 127
ULONG_INT_MAX = 18446744073709551616
CHARS = (list(string.ascii_lowercase) + list(string.ascii_uppercase)
+ list(string.punctuation) + list(string.digits))
CHARS.remove("\"")
CHARS.remove("\\")
CHARS.extend([r"\t", r"\n", r"\r", r"\v", r"\f", "\\\\"])
def parse_args():
parser = argparse.ArgumentParser(prog="ft_printf_test generator", description="A random test generator")
parser.add_argument("-n", "--tests", type=int, default=100, help="number of tests to generate")
parser.add_argument("-c", "--check-gcc", action="store_true", help="check generated test is valid with gcc (slow)")
parser.add_argument("-o", "--output", default="generated.c", help="output file")
parser.add_argument("-a", "--args-max", default=5, type=int, help="maximum number of argument")
parser.add_argument("-f", "--flags-max", default=3, type=int, help="maximum number of flags")
parser.add_argument("-s", "--str-max", default=30, type=int, help="maximum length of string")
return vars(parser.parse_args(sys.argv[1:]))
class Generator:
def __init__(self, options):
self.test_nb = options["tests"]
self.check_valid = options["check_gcc"]
self.output_filename = options["output"]
self.output_file = None
self.tmp_filename = "tmp.c"
self.args_max = options["args_max"]
self.flags_max = options["flags_max"]
self.str_max_len = options["str_max"]
self.width_max = 200
self.width_wildcard_rate = 10
self.width_empty_rate = 2
self.precision_max = 200
self.precision_wildcard_rate = 10
self.precision_empty_rate = 2
self.precision_point_rate = 4
self.possible_flags = "#0- +"
self.possible_conv ="diuxXcsp"
self.possible_conv_len = len(self.possible_conv)
self.pool = []
def run(self):
if self.check_valid:
os.system(f"touch {self.tmp_filename}")
with open(self.output_filename, "w") as self.output_file:
self._write_header()
while self.test_nb > 0:
assert_printf = self._random_printf()
if self.check_valid and not self._compile(assert_printf):
print("Failed to generate:", assert_printf)
continue
self.test_nb -= 1
self.output_file.write(assert_printf + "\n\t")
print("Generated", self.test_nb)
self._write_footer()
if self.check_valid:
os.system(f"rm {self.tmp_filename}")
def _compile(self, assert_printf):
with open(self.tmp_filename, "w") as tmp_file:
tmp_file.write("#include <stdio.h>\n#include \"header.h\"\nvoid t (){")
tmp_file.write(assert_printf + "}")
return os.system("gcc -c -Wformat -Werror tmp.c > /dev/null 2>&1") == 0
def _random_printf(self):
formats, args = self._random_args()
args_str = "".join(["," + str(a) for a in args if a is not None])
return f"ASSERT_PRINTF(\"{''.join(formats)}\" {args_str});"
def _random_args(self):
args = []
formats = []
for _ in range(randrange(1, self.args_max + 1)):
conv = self.possible_conv[randrange(self.possible_conv_len)]
f = self._random_fmt(conv)
for _ in range(f.count("*")):
args.append(randrange(-200, 200))
formats.append(f)
args.append(self._random_arg(conv))
return formats, args
def _random_fmt(self, conv):
return "%" + self._random_flags(conv) + self._random_width() + self._random_precision(conv) + conv
def _random_arg(self, conv):
return {
'c': randrange(CHAR_MIN, CHAR_MAX + 1),
's': "\"" + self._random_string() + "\"",
'd': randrange(INT_MIN, INT_MAX + 1),
'i': randrange(INT_MIN, INT_MAX + 1),
'u': str(randrange(UINT_MAX)) + "u",
'x': str(randrange(UINT_MAX)) + "u",
'X': str(randrange(UINT_MAX)) + "u",
'p': "(void*)" + str(randrange(ULONG_INT_MAX)) + "lu"
}[conv]
def _random_flags(self, conv):
if self.flags_max <= 0:
return ""
flags = "".join([choice(self.possible_flags) for _ in range(randrange(self.flags_max))])
if "+" in flags and conv in "psxXcu":
flags = flags.replace("+", "")
if " " in flags and conv in "pcsuxX":
flags = flags.replace(" ", "")
if "0" in flags and conv in "pcs":
flags = flags.replace("0", "")
if "#" in flags and conv in "upcsdi":
flags = flags.replace("#", "")
if "0" in flags and "-" in flags:
flags = flags.replace("0", "")
if " " in flags and "+" in flags:
flags = flags.replace(" ", "")
return flags
def _random_width(self):
p = randrange(100)
if p < self.width_wildcard_rate:
return "*"
p -= self.width_wildcard_rate
if p < self.width_empty_rate:
return ""
return str(randrange(1, self.width_max))
def _random_precision(self, conv):
if conv == "p" or conv == "c":
return ""
p = randrange(100)
if p < self.precision_wildcard_rate:
return ".*"
p -= self.precision_wildcard_rate
if p < self.precision_empty_rate:
return ""
p -= self.precision_empty_rate
if p < self.precision_point_rate:
return "."
return "." + str(randrange(self.precision_max))
def _random_string(self):
return "".join([choice(CHARS) for _ in range(randrange(self.str_max_len))])
def _write_header(self):
self.output_file.write("#include \"header.h\"\n\nvoid generated_test(void)\n{\n\t")
def _write_footer(self):
self.output_file.write("}\n")
if __name__ == "__main__":
options = parse_args()
g = Generator(options)
g.run()
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