def gen_code(src: str):
parser = CParser()
ast = parser.parse(src, '')
sts = symtab_store(ast)
block = genTACs(ast, sts) # 现在没有输出了
asm_code_text = asm_ctrl.gen_code_text()
print(asm_code_text)
def parse_file(filename, use_cpp=False, cpp_path='cpp', cpp_args='',
parser=None):
'''Modified version of pycparser's parse_file.
Args:
filename (string): Name of file to be parsed
use_cpp (optional[bool]): True if cpp will be used
cpp_path (optional[string]): Path to cpp
cpp_args (optional[string]): Arguments for cpp
parser (optional[CParser]): Parser to be used
Returns:
tuple: (filename, source, AST)
'''
with open(filename, 'rU') as f:
text = f.read()
if use_cpp:
processedText = preprocess_file(filename, cpp_path, cpp_args)
else:
processedText = text
if parser is None:
parser = CParser()
return (filename, text, parser.parse(processedText, filename))
def _parse_file(
self,
filename: str,
use_cpp: bool = False,
cpp_path: str = "cpp",
cpp_args: str = "",
parser: pycparser.CParser = None,
) -> pycparser.c_ast.FileAST:
if use_cpp:
text = self._preprocess_file(filename, cpp_path, cpp_args)
else:
with open(filename, "rU") as f:
text = f.read()
if parser is None:
parser = pycparser.CParser()
try:
return parser.parse(text, filename)
except pycparser.c_parser.ParseError as error:
if isinstance(error, pycparser.c_parser.ParseError):
context = self._parse_error_context(text, error)
else:
context = ""
LOGGER.error(
f"Parsing of {filename} failed. Details:\t{str(error)}\n{context}"
)
raise error
def __init__(self,
hfiles,
includes=[],
include_dirs=[],
predefs={},
prelude=[],
debug=False):
self.hfiles = hfiles
self.types = OrderedDict()
self.funcs = OrderedDict()
self.macros = OrderedDict()
self.macros.update(predefs)
self.include_dirs = include_dirs
lines = []
self._included = set()
for hfile in hfiles:
lines.extend(self._load_with_includes(hfile, includes))
lines[0:0] = prelude
text = self._preprocess(lines)
if debug:
with open("tmp.c", "w") as f:
f.write(text)
self.packed_lines = set(self._get_packed_regions(text))
parser = CParser()
ast = parser.parse(text, "tmp.c")
visitor = CtypesGenVisitor(self)
visitor.visit(ast)
def parse_file(filename, use_cpp=True):
if use_cpp:
path_list = [
'cpp',
'-U __GNUC__',
'-isystem', os.path.join(HEADER_REPLACEMENTS, 'usr', 'include'),
# We just provide with a custom (but hackish) va_list
# typedef in our own .h
'-include', os.path.join(HEADER_REPLACEMENTS, 'valist.h'),
filename,
]
print path_list
pipe = Popen(path_list,
stdout=PIPE,
universal_newlines=True)
text = pipe.communicate()[0]
else:
text = open(filename).read()
parser = CParser()
# strip __extension__
text = text.replace('__extension__', '')
try:
return parser.parse(text, filename)
except ParseError:
print >>sys.stderr, text
raise
def _cached_shared_ast(
source: str, fn_name: str
) -> Tuple[ca.FuncDef, int, ca.FileAST]:
parser = CParser()
ast = parser.parse(source)
orig_fn, fn_index = ast_util.extract_fn(ast, fn_name)
ast_util.normalize_ast(orig_fn, ast)
return orig_fn, fn_index, ast
def ExtractFuncDeclFromSource(source):
try:
p = CParser()
ast = p.parse(source + ';')
funcs = ExtractAllFuncDecls(ast)
for name, func in funcs.items():
return func
except Exception as e:
import traceback
traceback.print_exc()
def ExtractFuncDeclFromSource(source):
try:
p = CParser()
ast = p.parse(source + ';')
funcs = ExtractAllFuncDecls(ast)
for name, func in funcs.items():
return func
except Exception as e:
import traceback
traceback.print_exc()
def makeAST(code):
try:
parser = CParser(lex_optimize=False, yacc_optimize=False)
#parser = CParser()
ast = parser.parse(code, filename=g.filename)
except Exception as e:
print(e)
exit()
#ast.show()
node = projectAST(ast)
#print(json.dumps(node, default=lambda x: {x.__class__.__name__: x.__dict__}, indent=2))
#g.r.addReport(m.Report('fatal', a2t(ast), f"debugmode"))
return node
def parse_c(source: str) -> ca.FileAST:
try:
parser = CParser()
return parser.parse(source, "<source>")
except ParseError as e:
msg = str(e)
position, msg = msg.split(": ", 1)
parts = position.split(":")
if len(parts) >= 2:
lineno = int(parts[1])
posstr = f" at approximately line {lineno}"
if len(parts) >= 3:
posstr += f", column {parts[2]}"
posstr += " (after PERM expansion)"
try:
line = source.split("\n")[lineno - 1].rstrip()
posstr += "\n\n" + line
except IndexError:
posstr += "(out of bounds?)"
else:
posstr = ""
raise CandidateConstructionFailure(
f"Syntax error in base.c.\n{msg}{posstr}") from None
def __init__(self, hfiles, includes = [], include_dirs = [], predefs = {}, prelude = [], debug = False):
self.hfiles = hfiles
self.types = OrderedDict()
self.funcs = OrderedDict()
self.macros = OrderedDict()
self.macros.update(predefs)
self.include_dirs = include_dirs
lines = []
self._included = set()
for hfile in hfiles:
lines.extend(self._load_with_includes(hfile, includes))
lines[0:0] = prelude
text = self._preprocess(lines)
if debug:
with open("tmp.c", "w") as f:
f.write(text)
self.packed_lines = set(self._get_packed_regions(text))
parser = CParser()
ast = parser.parse(text, "tmp.c")
visitor = CtypesGenVisitor(self)
visitor.visit(ast)
def parse_file(self, filename):
parser = CParser()
buf = file(filename).read()
buf = DIRECTIVE_RE.sub("", buf) #r"/* directive \1 elided */", buf)
t = parser.parse(buf, filename)
self.visit(t)
def main(text):
logging.debug("Running main function")
print("start", json.dumps(text))
# STAGE 1 - PREPROCESSOR
text = preprocess(text, INTERACTIVE_MODE)
logging.info("After preprocessing, text is: " + text)
# STAGE 2 - LEXICAL AND SYNTAX ANALYSIS
parser = CParser()
tree = parser.parse(text)
logging.info(tree)
if INTERACTIVE_MODE:
tree_dict = to_dict(tree)
trim_tree(tree_dict)
print("tree", json.dumps(tree_dict))
# STAGE 3 - GLOBAL VARIABLE TABLE
global_symbols = global_parser(tree.ext, INTERACTIVE_MODE)
ID.globals = global_symbols
# STAGE 4 - Store local variables and perform type checking
top_compound = None
for top_level in tree.ext:
if isinstance(top_level, FuncDef) and top_level.decl.name == "main":
top_compound = top_level.body
break
if top_compound is None:
logging.fatal("No main function found")
return
parse_compound(top_compound, [], global_symbols)
if INTERACTIVE_MODE:
print("locals")
# STAGE 5 - HIERARCHICAL INSTRUCTION GENERATION
main_block = generate_code_block(top_compound, global_symbols)
# STAGE 6 - ASSEMBLY GENERATION
if INTERACTIVE_MODE:
print("start_codegen")
assembly = """section.meta
mem_amt={mem_amt}
section.data
{data_section}
section.text
{text_section}
""".format(mem_amt=4,
data_section=produce_data_section(global_symbols, INTERACTIVE_MODE),
text_section=produce_text_section(main_block, global_symbols,
INTERACTIVE_MODE))
# STAGE 7 - POST-GENERATION OPTIMISATION
assembly = optimise(assembly)
if INTERACTIVE_MODE:
print("finish", json.dumps(assembly))
else:
print(assembly)
def main():
argparser = argparse.ArgumentParser(description='Compile C to a Minecraft datapack')
argparser.add_argument('file', metavar='Cfile', type=pathlib.Path, help='Path to the C file')
argparser.add_argument('target', metavar='target', type=pathlib.Path, help='Location to write functions in')
argparser.add_argument('--preprop', dest='preprop', action='store_const', const=True, default=False,
help='Don\'t run the C preprocessor on the file')
argparser.add_argument('--file-input', help='Take constant input from file', dest='finput', metavar='file',
default=False, type=pathlib.Path)
program_args = argparser.parse_args()
if program_args.preprop:
preprocessed = open(program_args.file).read()
else:
preprocessed = subprocess.check_output(
['gcc', '-nostdinc', '-E', program_args.file, f'-I{os.path.dirname(os.path.abspath(__file__))}/libc']).decode()
print(program_args.target)
if program_args.finput:
inp = list(reversed(program_args.finput.open('rb').read()))
try:
shutil.rmtree(program_args.target / 'functions')
except IOError:
pass
os.mkdir(program_args.target / 'functions')
os.mkdir(program_args.target / 'functions' / 'tree')
copy_stdlib(program_args.target / 'functions')
os.chdir(program_args.target / 'functions')
parser = CParser()
parsed = parser.parse(preprocessed)
obj_name = {}
vtypes = {}
vars = {}
methods = {}
for global_definition in parsed.ext:
if cname(global_definition) == 'Typedef':
add_type(global_definition.name, get_type(global_definition.type, obj_name, vtypes))
elif cname(global_definition) == 'Decl' and cname(global_definition.type) != 'FuncDecl':
vars[global_definition.name] = global_definition
global varaddr
elif cname(global_definition) == 'Decl' and cname(global_definition.type) == 'FuncDecl':
return_types[global_definition.name] = get_type(global_definition.type.type)
arguments[global_definition.name] = parse_arguments(global_definition.type.args)
elif cname(global_definition) == 'FuncDef':
return_types[global_definition.decl.name] = get_type(global_definition.decl.type.type)
arguments[global_definition.decl.name] = parse_arguments(global_definition.decl.type.args)
# print(functions)
methods[global_definition.decl.name] = global_definition
else:
print(cname(global_definition))
update_types()
file = open('main.mcfunction', 'w')
file.write(generate_head(vars, obj_name, vtypes))
for method in methods:
f = open(f'method_{method.lower()}.mcfunction', 'w')
set_rtype(return_types[method])
args = methods[method].decl.type.args
if args is None:
args = []
clear_used()
reset_locals()
j = 0
for arg in args:
if cname(arg) == 'EllipsisParam':
j += 10
for i in range(10): create_local()
break
var_type = arg.type
vtypes[arg.name] = get_type(var_type)
obj_name[arg.name] = [create_local() for i in range(get_type(arg.type).size)]
j += vtypes[arg.name].size
new_cid()
f.write(generate_expression([], methods[method].body, vtypes, obj_name, False, True)[0])
f.write(f'scoreboard players set $returned {NAMESPACE} 0')
f.close()
generate_trees()
if program_args.finput:
file.write(f'data modify storage {NAMESPACE}:main input set value {inp}\n')
file.write(f'data modify storage {NAMESPACE}:main rec set value []\n')
file.write(f'data modify storage {NAMESPACE}:main ibuffer set value []\n')
for strg in stringss:
for i, c in enumerate(stringss[strg]):
# TODO: change it to direct access to the heap, as index is known in compile time.
file.write(f'scoreboard players set $index {NAMESPACE} {strg + i}\n')
file.write(f'scoreboard players set $value {NAMESPACE} {c}\n')
file.write(f'function {NAMESPACE}:set_heap\n')
file.write(f'function {NAMESPACE}:method_main\n')
file.close()
goto_postprocess()
remove_zerolines()
inline_oneline()
make_pausable({'method_getc', 'method__get_setjmp'})
remove_unused()
dfs(u.cond)
dfs(u.stmt)
@register('DoWhile')
def DoWhile(u):
dfs(u.cond)
dfs(u.stmt)
@register('TernaryOp')
def TernaryOp(u: c_ast.TernaryOp):
dfs(u.cond)
dfs(u.iftrue)
dfs(u.iffalse)
dfs(ast)
return sts
if __name__ == '__main__':
argparser = argparse.ArgumentParser('Dump AST with ...')
argparser.add_argument('filename', help='name of file to parse')
args = argparser.parse_args()
parser = CParser()
with open(args.filename, 'r') as f:
ast = parser.parse(f.read(), args.filename)
print(ast)
sts = symtab_store(ast)
sts.show(ast)
)
preprocessed = ""
# pycparser requires each symbol must be defined, hence provide a dummy
# definition of the needed stdlib types.
# Note those definitions will then be detected and ignored by PatchedAutoPxd.
for stdtype in STDLIB_TYPES:
preprocessed += f"typedef int {stdtype};\n"
preprocessed += cccp.parse(source)
with open("output.preprocessed.c", "w") as fd:
fd.write(preprocessed)
# Step 2: C parsing
parser = CParser()
ast = parser.parse(preprocessed)
# Step 3: .pxd generation
p = PatchedAutoPxd(header_name)
p.visit(ast)
pxd_cdef = p.lines()
# Remove the cdef part given we want to add the `nogil` option and
# we also want to add the `godot_method_flags` C inline code
assert pxd_cdef[0].startswith("cdef extern from")
pxd_cdef_body = "\n".join(pxd_cdef[1:])
pxd = f"""\
# /!\\ Autogenerated code, modifications will be lost /!\\
# see `generation/generate_gdnative_api_struct.py`
def parse_file(self, filename):
parser = CParser()
buf = file(filename).read()
buf = DIRECTIVE_RE.sub("", buf)#r"/* directive \1 elided */", buf)
t = parser.parse(buf, filename)
self.visit(t)
