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clangdom.py
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clangdom.py
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import re
import sys
import copy
# See http://clang.llvm.org/docs/IntroductionToTheClangAST.html
from clang.cindex import Index, CursorKind, TranslationUnit
def auto_load():
""" Find libclang and load it """
if sys.startswith('linux'):
pass
class Object(object):
def __setattr__(self, name, value):
self.__dict__[name] = value
def __getattr__(self, name):
self.__dict__.get(name, None)
class Node(object):
def __init__(self):
self.children = []
def visit(self, parent, children):
pass
class Unit(Object):
pass
class Decl(object):
def __init__(self, arg):
super(Decl, self).__init__()
self.arg = arg
class Type(object):
def __init__(self, arg):
super(Type, self).__init__()
self.arg = arg
class DeclContext(object):
def __init__(self, arg):
super(DeclContext, self).__init__()
self.arg = arg
class Stmt(object):
def __init__(self, arg):
super(Stmt, self).__init__()
self.arg = arg
@classmethod
def parse(cls, cursor):
pass
class FunctionParam(object):
def __init__(self, name, type):
self.name = name
self.type = type
super(FunctionParam, self).__init__()
def __repr__(self):
return "%s %s" % (self.type, self.name)
class Function(object):
""" http://clang.llvm.org/doxygen/classclang_1_1FunctionDecl.html """
def __init__(self, name, params=[], returnType=""):
self.name = name
self.params = params
self.returnType = returnType
super(Function, self).__init__()
def __repr__(self):
params = [p.type + ' ' + p.name for p in self.params]
return "%s %s(%s)" % (self.returnType, self.name, ",".join(params))
@classmethod
def parse(cls, cursor):
func_name = cursor.spelling
result_type = cursor.result_type.spelling
args = []
for arg in cursor.get_arguments():
name = arg.spelling
type = arg.type.spelling
args.append(FunctionParam(name, type))
statements = []
for child in cursor.get_children():
if child.kind == CursorKind.COMPOUND_STMT:
for stmt in child.get_children():
statements.append(Stmt.parse(stmt))
return Function(func_name, args, result_type)
class Class(Node):
def __init__(self, name, functions = []):
self.name = name
self.template_args = []
self.functions = functions
@classmethod
def parse(cls, cursor):
name = cursor.spelling
functions = []
for child in cursor.get_children():
if child.kind == CursorKind.TEMPLATE_NON_TYPE_PARAMETER:
pass
elif child.kind == CursorKind.CXX_ACCESS_SPEC_DECL:
# access_specifier
pass
elif child.kind == CursorKind.CXX_METHOD:
function = Function.parse(child)
functions.append(function)
return Class(name, functions=functions)
class NameSpace(object):
def __init__(self, name="<anonymous>", classes=[], functions=[]):
self.name = name
self.classes = classes
self.functions = functions
@classmethod
def parse(cls, cursor):
name = cursor.spelling
classes = []
for child in cursor.get_children():
if child.kind == CursorKind.CLASS_DECL or child.kind == CursorKind.CLASS_TEMPLATE:
classes.append(Class.parse(child))
return NameSpace(name, classes, [])
class IncludeFile(object):
def __init__(self, name, type="absolute"):
self.name = name
self.type = type
super(IncludeFile, self).__init__()
@classmethod
def parse(cls, src, cursor):
includes = []
included = {}
"""
for i in cursor.get_includes():
if i.depth == 1:
includes.append(IncludeFile(i.include.name))
included[i.include.name] = 1
"""
content = file(src).read()
content = re.sub(r'/\*.+?\*/', '', content, flags=re.S) # Remove /* comments
for line in content.splitlines():
m = re.match(r'^\s*#include\s*(<|")(.+?)(>|")\s*', line)
if m:
l, f, r = m.groups()
fullname = l + f + r
if included.has_key(fullname):
continue
if l == "<":
includes.append(IncludeFile(f))
else:
includes.append(IncludeFile(f, "relative"))
included[fullname] = 1
return includes
def __repr__(self):
return "IncludeFile (%s:%s)" % (self.name, self.type)
class Parser(object):
def __init__(self):
self.index = Index.create()
self.ast = Object()
self.mapping = {
}
super(Parser, self).__init__()
def parse_includes(self, src, unit):
# Parse includes
# The problem with below commented approach is that diagnostics don't contain all include files.
"""
for diag in unit.diagnostics:
m = re.match(r'\'(.+?)\' file not found', diag.spelling)
if m:
self.ast.includes.append(m.groups()[0])
"""
self.ast.includes = IncludeFile.parse(src, unit)
# include statement is not in comments or literal string
def parse_function(self, cursor):
for arg in cursor.get_arguments():
pass
def parse(self, src):
unit = self.index.parse(src,
args = ['-xc++', '-Xclang', '-ast-dump', '-fsyntax-only'],
options = TranslationUnit.PARSE_INCOMPLETE)
self.parse_includes(src, unit)
self.visit(unit.cursor)
return self.ast
def visit(self, node):
for child in node.get_children():
if child.kind == CursorKind.FUNCTION_DECL:
self.ast.functions = self.ast.functions or []
self.ast.functions.append(Function.parse(child))
elif child.kind == CursorKind.NAMESPACE:
self.ast.namespaces = self.ast.functions or []
self.ast.namespaces.append(NameSpace.parse(child))
else:
self.visit(child)
def visit(node, depth=1):
print ' ' * depth, node.kind, node.xdata, node.spelling
for c in node.get_children():
visit(c, depth+1)
if __name__ == '__main__':
parser = Parser()
unit = parser.parse('./tests/IRBuilder.h')
print unit.functions