def main():
"""Driver code for Abstract syntax tree
Generation"""
#read source code provided by user
arg_parser = argparse.ArgumentParser(
description="Lexer for Source Language C")
arg_parser.add_argument('source_code', help="source code file location")
arg_parser.add_argument('-o',
help="take the name of dot script",
default="ast.dot")
arg_parser.add_argument('-f',
help="take the name of png file",
default="ast.png")
arg_parser.add_argument('-d',
help="take the name of csv file",
default="dump.csv")
arg_parser.add_argument('-p',
action='store_true',
help="output dot script to console")
arg_parser.add_argument('-l',
action='store_true',
help="output lexeme table")
args = arg_parser.parse_args()
try:
# source_code = open(sys.argv[1],"r").read()
source_code = open(args.source_code, "r").read()
except FileNotFoundError:
print(
"source file cannot be open/read.\nCheck the file name or numbers of arguments!!"
)
sys.exit(-1)
if args.l:
print_lexeme(source_code)
parser = yacc.yacc(debug=1)
lexer.lexer.filename = args.source_code
result = parser.parse(source_code, lexer=lexer.lexer)
#print(sym_table)
if len(Errors.get_all_error()):
for error in Errors.get_all_error():
print(error)
return
Graph = draw_ast(result)
# print(args)
if args.p:
Graph.draw(args.f, format='png')
print(Graph.string())
return
Graph.draw(args.f, format='png')
file = open(args.o, 'w')
file.write(Graph.string())
file.close()
# print(sym_table)
# print(args.d)
print_csv(sym_table=sym_table, filename=args.d)
def main():
"""Driver code for Abstract syntax tree
Generation"""
#read source code provided by user
arg_parser = argparse.ArgumentParser(description="C compiler for x86_64")
arg_parser.add_argument('source_code', help="location of source code file")
arg_parser.add_argument('-o',
help="output file name, \{default a.out\}",
default="a.out")
arg_parser.add_argument(
'-f',
help="name of file for additional files, \{default a\}",
default="a")
arg_parser.add_argument('-c',
action='store_true',
help="output object file")
arg_parser.add_argument('-d', action='store_true', help="output assembly")
arg_parser.add_argument('-a', action='store_true', help="output ast")
arg_parser.add_argument('-s',
action='store_true',
help="output symbol table")
arg_parser.add_argument('-t',
action='store_true',
help="output 3 address code")
arg_parser.add_argument('-l',
action='store_true',
help="output lexeme table")
arg_parser.add_argument(
'-stdc',
action='store_true',
help=
"linker method, if specified it'll uses custom elf entry else from standard X86-64-linux.so"
)
arg_parser.add_argument(
'-n',
action="store_false",
help="only create till asm, , do not create executable")
args = arg_parser.parse_args()
try:
source_code = open(args.source_code, "r").read()
except FileNotFoundError:
print(
"source file cannot be open/read.\nCheck the file name or numbers of arguments!!"
)
sys.exit(-1)
source_file = args.source_code
file_name = args.f
grammar = get_grammar(source_file, source_code, debug=1)
if len(Errors.get_all_error()):
for error in Errors.get_all_error():
print(error)
return
tac_code = grammar.code
tac_code = remove_none(tac_code)
#to remove redundant labels
tac_code = remove_label(tac_code)
print_asm(tac_code, stdc=args.stdc)
#assembly
if args.d:
os.system("cp temp.asm {}.asm".format(file_name))
if args.n:
asm_file = "temp.asm"
os.system('yasm -g dwarf2 -f elf64 temp.asm 2> temp')
os.system('touch temp')
if args.c:
os.system("cp temp.o " + file_name + ".o")
if args.stdc:
os.system(
"ld -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o {} temp.o -lc -lm 2> temp"
.format(args.o))
else:
os.system(
"ld -o {} -dynamic-linker /lib64/ld-linux-x86-64.so.2 /usr/lib/x86_64-linux-gnu/crt1.o /usr/lib/x86_64-linux-gnu/crti.o -lc temp.o /usr/lib/x86_64-linux-gnu/crtn.o -lm 2> temp"
.format(args.o))
os.system("rm -rf temp.asm temp.o temp")
else:
os.system("rm -rf temp.asm")
# ast
if args.a:
Graph = draw_ast(grammar)
Graph.draw(file_name + '.png', format='png')
# symbol table
if args.s:
print_csv(sym_table=sym_table, filename=file_name + ".csv")
# 3AC
if args.t:
print_code(tac_code, filename=file_name + ".3ac")
# lexeme
if args.l:
print_lexeme(source_code, file_name + ".lex")