123 lines
4.3 KiB
Python
123 lines
4.3 KiB
Python
#-------------------------------------------------------------------------------
|
|
# Generate an intermediate representation of a clang AST dump.
|
|
#-------------------------------------------------------------------------------
|
|
import json, sys, subprocess
|
|
|
|
def is_api_decl(decl, prefix):
|
|
if 'name' in decl:
|
|
return decl['name'].startswith(prefix)
|
|
elif decl['kind'] == 'EnumDecl':
|
|
# an anonymous enum, check if the items start with the prefix
|
|
return decl['inner'][0]['name'].lower().startswith(prefix)
|
|
else:
|
|
return False
|
|
|
|
def is_dep_decl(decl, dep_prefixes):
|
|
for prefix in dep_prefixes:
|
|
if is_api_decl(decl, prefix):
|
|
return True
|
|
return False
|
|
|
|
def dep_prefix(decl, dep_prefixes):
|
|
for prefix in dep_prefixes:
|
|
if is_api_decl(decl, prefix):
|
|
return prefix
|
|
return None
|
|
|
|
def filter_types(str):
|
|
return str.replace('_Bool', 'bool')
|
|
|
|
def parse_struct(decl):
|
|
outp = {}
|
|
outp['kind'] = 'struct'
|
|
outp['name'] = decl['name']
|
|
outp['fields'] = []
|
|
for item_decl in decl['inner']:
|
|
if item_decl['kind'] != 'FieldDecl':
|
|
sys.exit(f"ERROR: Structs must only contain simple fields ({decl['name']})")
|
|
item = {}
|
|
if 'name' in item_decl:
|
|
item['name'] = item_decl['name']
|
|
item['type'] = filter_types(item_decl['type']['qualType'])
|
|
outp['fields'].append(item)
|
|
return outp
|
|
|
|
def parse_enum(decl):
|
|
outp = {}
|
|
if 'name' in decl:
|
|
outp['kind'] = 'enum'
|
|
outp['name'] = decl['name']
|
|
needs_value = False
|
|
else:
|
|
outp['kind'] = 'consts'
|
|
needs_value = True
|
|
outp['items'] = []
|
|
for item_decl in decl['inner']:
|
|
if item_decl['kind'] == 'EnumConstantDecl':
|
|
item = {}
|
|
item['name'] = item_decl['name']
|
|
if 'inner' in item_decl:
|
|
const_expr = item_decl['inner'][0]
|
|
if const_expr['kind'] != 'ConstantExpr':
|
|
sys.exit(f"ERROR: Enum values must be a ConstantExpr ({decl['name']})")
|
|
if const_expr['valueCategory'] != 'rvalue':
|
|
sys.exit(f"ERROR: Enum value ConstantExpr must be 'rvalue' ({decl['name']})")
|
|
if not ((len(const_expr['inner']) == 1) and (const_expr['inner'][0]['kind'] == 'IntegerLiteral')):
|
|
sys.exit(f"ERROR: Enum value ConstantExpr must have exactly one IntegerLiteral ({decl['name']})")
|
|
item['value'] = const_expr['inner'][0]['value']
|
|
if needs_value and 'value' not in item:
|
|
sys.exit(f"ERROR: anonymous enum items require an explicit value")
|
|
outp['items'].append(item)
|
|
return outp
|
|
|
|
def parse_func(decl):
|
|
outp = {}
|
|
outp['kind'] = 'func'
|
|
outp['name'] = decl['name']
|
|
outp['type'] = filter_types(decl['type']['qualType'])
|
|
outp['params'] = []
|
|
if 'inner' in decl:
|
|
for param in decl['inner']:
|
|
if param['kind'] != 'ParmVarDecl':
|
|
print(f"warning: ignoring func {decl['name']} (unsupported parameter type)")
|
|
return None
|
|
outp_param = {}
|
|
outp_param['name'] = param['name']
|
|
outp_param['type'] = filter_types(param['type']['qualType'])
|
|
outp['params'].append(outp_param)
|
|
return outp
|
|
|
|
def parse_decl(decl):
|
|
kind = decl['kind']
|
|
if kind == 'RecordDecl':
|
|
return parse_struct(decl)
|
|
elif kind == 'EnumDecl':
|
|
return parse_enum(decl)
|
|
elif kind == 'FunctionDecl':
|
|
return parse_func(decl)
|
|
else:
|
|
return None
|
|
|
|
def clang(csrc_path):
|
|
cmd = ['clang', '-Xclang', '-ast-dump=json', '-c' ]
|
|
cmd.append(csrc_path)
|
|
return subprocess.check_output(cmd)
|
|
|
|
def gen(header_path, source_path, module, main_prefix, dep_prefixes):
|
|
ast = clang(source_path)
|
|
inp = json.loads(ast)
|
|
outp = {}
|
|
outp['module'] = module
|
|
outp['prefix'] = main_prefix
|
|
outp['dep_prefixes'] = dep_prefixes
|
|
outp['decls'] = []
|
|
for decl in inp['inner']:
|
|
is_dep = is_dep_decl(decl, dep_prefixes)
|
|
if is_api_decl(decl, main_prefix) or is_dep:
|
|
outp_decl = parse_decl(decl)
|
|
if outp_decl is not None:
|
|
outp_decl['is_dep'] = is_dep
|
|
outp_decl['dep_prefix'] = dep_prefix(decl, dep_prefixes)
|
|
outp['decls'].append(outp_decl)
|
|
return outp
|