def parse_file( filename, use_cpp=False,
cpp_path='cpp', cpp_args=''):
""" Parse a C file using pycparser.
filename:
Name of the file you want to parse.
use_cpp:
Set to True if you want to execute the C pre-processor
on the file prior to parsing it.
cpp_path:
If use_cpp is True, this is the path to 'cpp' on your
system. If no path is provided, it attempts to just
execute 'cpp', so it must be in your PATH.
cpp_args:
If use_cpp is True, set this to the command line
arguments strings to cpp. Be careful with quotes -
it's best to pass a raw string (r'') here.
For example:
r'-I../utils/fake_libc_include'
If several arguments are required, pass a list of
strings.
When successful, an AST is returned. ParseError can be
thrown if the file doesn't parse successfully.
Errors from cpp will be printed out.
"""
if use_cpp:
path_list = [cpp_path]
if isinstance(cpp_args, ListType):
path_list += cpp_args
elif cpp_args != '':
path_list += [cpp_args]
path_list += [filename]
# Note the use of universal_newlines to treat all newlines
# as \n for Python's purpose
#
pipe = Popen( path_list,
stdout=PIPE,
universal_newlines=True)
text = pipe.communicate()[0]
else:
text = open(filename).read()
parser = CParser()
return parser.parse(text, filename)
def parse_file(filename, use_cpp=False, cpp_path='cpp', cpp_args=''):
""" Parse a C file using pycparser.
filename:
Name of the file you want to parse.
use_cpp:
Set to True if you want to execute the C pre-processor
on the file prior to parsing it.
cpp_path:
If use_cpp is True, this is the path to 'cpp' on your
system. If no path is provided, it attempts to just
execute 'cpp', so it must be in your PATH.
cpp_args:
If use_cpp is True, set this to the command line
arguments strings to cpp. Be careful with quotes -
it's best to pass a raw string (r'') here.
For example:
r'-I../utils/fake_libc_include'
If several arguments are required, pass a list of
strings.
When successful, an AST is returned. ParseError can be
thrown if the file doesn't parse successfully.
Errors from cpp will be printed out.
"""
if use_cpp:
path_list = [cpp_path]
if isinstance(cpp_args, ListType):
path_list += cpp_args
elif cpp_args != '':
path_list += [cpp_args]
path_list += [filename]
# Note the use of universal_newlines to treat all newlines
# as \n for Python's purpose
#
pipe = Popen(path_list, stdout=PIPE, universal_newlines=True)
text = pipe.communicate()[0]
else:
text = open(filename).read()
parser = CParser()
return parser.parse(text, filename)
def compile(self):
parser = CParser()
ast = parser.parse(self.textSrc.toPlainText())
self.textAST.setText(ast.toString(attrnames=True, nodenames=True))
translator = CTranslator()
translator.visit(ast)
codes = translator.get_codes()
code_text = ''
for code in codes:
code_text += str(code) + '\n'
self.textCode.setText(code_text)
codes = translator.get_codes()
tables = translator.get_tables()
assembler = CAssembler(tables)
asm = assembler.asm(codes)
self.textAsm.setText(asm)
with open('hello.s', 'w') as f:
f.write(asm)
os.system('gcc {filename} -o hello.exe'.format(filename='hello.s'))
self.statusBar().showMessage('编译完成！请点击运行程序。')
def parse_file(filename, use_cpp=False, cpp_path='cpp', cpp_args='',
parser=None):
""" Parse a C file using pycparser.
filename:
Name of the file you want to parse.
use_cpp:
Set to True if you want to execute the C pre-processor
on the file prior to parsing it.
cpp_path:
If use_cpp is True, this is the path to 'cpp' on your
system. If no path is provided, it attempts to just
execute 'cpp', so it must be in your PATH.
cpp_args:
If use_cpp is True, set this to the command line arguments strings
to cpp. Be careful with quotes - it's best to pass a raw string
(r'') here. For example:
r'-I../utils/fake_libc_include'
If several arguments are required, pass a list of strings.
parser:
Optional parser object to be used instead of the default CParser
When successful, an AST is returned. ParseError can be
thrown if the file doesn't parse successfully.
Errors from cpp will be printed out.
"""
# if use_cpp:
# text = preprocess_file(filename, cpp_path, cpp_args)
# else:
# with open(filename, 'rU') as f:
# text = f.read()
if parser is None:
parser = CParser()
return parser.parse(text, filename)
elif type(nodeObj) is If:
handleIfElse(nodeObj)
elif type(nodeObj) is For:
handleForLoops(nodeObj)
elif type(nodeObj) is Decl:
handleDeclerations(nodeObj)
elif type(nodeObj) is UnaryOp:
handleUnaryOp(nodeObj)
else:
# are all other objs iterable ??
# handled recursively on children
for child in nodeObj:
dfs(child)
######################
## exec starts here
######################
parser = CParser()
with open("temp.c", 'rU') as f:
text = f.read()
syntaxTree = parser.parse(text, "temp.c")
dfs(syntaxTree)
options = get_options()
bounds_checked = options.bounds_checked
null_on_free = options.null_on_free
file_list = options.input
while source_file_count < len(file_list):
cur_file = open(file_list[source_file_count], 'r')
token_list: Deque[CToken] = deque()
tokenizer = Tokenizer()
tokenizer.nexttok(cur_file)
while (1):
tok = tokenizer.nexttok(cur_file)
token_list.append(tok)
if tok.val == Tok.eof:
break
output = Output()
parser = CParser(bounds_checked, null_on_free)
parser.parse(output, token_list, source_file_count)
# output to files
output.output_to_file(source_file_count, cur_file)
source_file_count += 1
print(source_file_count)
cur_file.close()
finish_time = time.time()
print("Time taken: " + str(finish_time - init_time) + "s")
pass
def dfs(nodeObj):
if (nodeObj):
if type(nodeObj) is Assignment:
handleAssignmentOp(nodeObj)
pass
elif type(nodeObj) is While or type(nodeObj) is DoWhile:
handleWhileLoops(nodeObj)
elif type(nodeObj) is FuncCall:
handleFunctionCalls(nodeObj)
elif type(nodeObj) is If:
handleIfElse(nodeObj)
else:
for child in nodeObj:
dfs(child)
parser = CParser()
with open("testing_c_file.c", 'rU') as f:
text = f.read()
syntaxTree = parser.parse(text, "testing_c_file.c")
dfs(syntaxTree)
from c_translator import CTranslator
from c_assembler import CAssembler
import os
data = '''
int main(){
for(int i = 1; i < 10; i++){
for(int j = 1; j<10; j++){
printf("%d*%d=%d\t", i, j, i*j);
}
printf("\n");
}
}
'''
parser = CParser()
ast = parser.parse(data)
# ast.show(attrnames=True, nodenames=True)
print(ast.toString(attrnames=True, nodenames=True))
translator = CTranslator()
translator.visit(ast)
for code in translator.get_codes():
print(code)
tables = translator.get_tables()
print(tables['symbol_table'])
codes = translator.get_codes()
assembler = CAssembler(tables)
asm = assembler.asm(codes)
print(asm)
with open('hello.s', 'w') as f:
from c_parser import CParser
data = '''
int main(double args){
char c = 'B';
char d[100];
for (int i = 0; i < 10; i++){
printf(i);
}
if (a>b) printf(">");
}
void printf(int str){
return 0;
}
'''
parser = CParser()
ast = parser.parse(data, '<none>')
# ast.show(attrnames=True, nodenames=True)
for decl in ast:
decl.show(attrnames=True, nodenames=True)