cef/tools/cef_parser.py

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# Copyright (c) 2011 The Chromium Embedded Framework Authors. All rights
# reserved. Use of this source code is governed by a BSD-style license that
# can be found in the LICENSE file.
from file_util import *
import os
import re
import shutil
import string
import sys
import textwrap
import time
def notify(msg):
""" Display a message. """
sys.stdout.write(' NOTE: '+msg+'\n')
def wrap_text(text, indent = '', maxchars = 80):
""" Wrap the text to the specified number of characters. If
necessary a line will be broken and wrapped after a word.
"""
result = ''
lines = textwrap.wrap(text, maxchars - len(indent))
for line in lines:
result += indent+line+'\n'
return result
def wrap_code(code, indent = ' ', maxchars = 80, splitchars = '(=,'):
""" Wrap the code lines to the specified number of characters. If
necessary a line will be broken and wrapped after one of the split
characters.
"""
output = ''
# normalize line endings
code = code.replace("\r\n", "\n")
# break the code chunk into lines
lines = string.split(code, '\n')
for line in lines:
if len(line) <= maxchars:
# line is short enough that it doesn't need to be wrapped
output += line + '\n'
continue
# retrieve the whitespace at the beginning of the line for later use
# as padding
ws = ''
for char in line:
if char.isspace():
ws += char
else:
break
# iterate over all characters in the string keeping track of where the
# last valid break character was found and wrapping the line
# accordingly
lastsplit = 0
nextsplit = -1
splitct = 0
pos = 0
for char in line:
if splitchars.find(char) >= 0:
# a new split position has been found
nextsplit = pos
size = pos - lastsplit + 1
if splitct > 0:
size += len(ws) + len(indent)
if size >= maxchars:
# the line is too long
section = line[lastsplit:nextsplit+1]
if len(section) > 0:
# output the line portion between the last split and the
# next split
if splitct > 0:
# start a new line and trim the line section
output += '\n'+ws+indent
section = string.strip(section)
output += section
lastsplit = nextsplit + 1
splitct += 1
pos += 1
if len(line) - lastsplit > 0:
# output the remainder of the line
section = line[lastsplit:]
if splitct > 0:
# start a new line and trim the line section
output += '\n'+ws+indent
section = string.strip(section)
output += section
output += '\n'
return output
def get_capi_name(cppname, isclassname, prefix = None):
""" Convert a C++ CamelCaps name to a C API underscore name. """
result = ''
lastchr = ''
for chr in cppname:
# add an underscore if the current character is an upper case letter
# and the last character was a lower case letter
if len(result) > 0 and not chr.isdigit() \
and string.upper(chr) == chr \
and not string.upper(lastchr) == lastchr:
result += '_'
result += string.lower(chr)
lastchr = chr
if isclassname:
result += '_t'
if not prefix is None:
if prefix[0:3] == 'cef':
# if the prefix name is duplicated in the function name
# remove that portion of the function name
subprefix = prefix[3:]
pos = result.find(subprefix)
if pos >= 0:
result = result[0:pos]+ result[pos+len(subprefix):]
result = prefix+'_'+result
return result
def get_prev_line(body, pos):
""" Retrieve the start and end positions and value for the line immediately
before the line containing the specified position.
"""
end = string.rfind(body, '\n', 0, pos)
start = body.rfind('\n', 0, end)+1
line = body[start:end]
return { 'start' : start, 'end' : end, 'line' : line }
def get_comment(body, name):
""" Retrieve the comment for a class or function. """
result = []
pos = body.find(name)
while pos > 0:
data = get_prev_line(body, pos)
line = string.strip(data['line'])
pos = data['start']
if len(line) == 0:
# check if the next previous line is a comment
prevdata = get_prev_line(body, pos)
if string.strip(prevdata['line'])[0:2] == '//':
result.append(None)
else:
break
elif line[0:2] == '/*':
continue
elif line[0:2] == '//':
# keep the comment line including any leading spaces
result.append(line[2:])
else:
break
result.reverse()
return result
def format_comment(comment, indent, translate_map = None, maxchars = 80):
""" Return the comments array as a formatted string. """
result = ''
wrapme = ''
hasemptyline = False
for line in comment:
# if the line starts with a leading space, remove that space
if not line is None and len(line) > 0 and line[0:1] == ' ':
line = line[1:]
didremovespace = True
else:
didremovespace = False
if line is None or len(line) == 0 or line[0:1] == ' ' \
or line[0:1] == '/':
# the previous paragraph, if any, has ended
if len(wrapme) > 0:
if not translate_map is None:
# apply the translation
for key in translate_map.keys():
wrapme = wrapme.replace(key, translate_map[key])
# output the previous paragraph
result += wrap_text(wrapme, indent+'// ', maxchars)
wrapme = ''
if not line is None:
if len(line) == 0 or line[0:1] == ' ' or line[0:1] == '/':
# blank lines or anything that's further indented should be
# output as-is
result += indent+'//'
if len(line) > 0:
if didremovespace:
result += ' '+line
else:
result += line;
result += '\n'
else:
# add to the current paragraph
wrapme += line+' '
else:
# output an empty line
hasemptyline = True
result += '\n'
if len(wrapme) > 0:
if not translate_map is None:
# apply the translation
for key in translate_map.keys():
wrapme = wrapme.replace(key, translate_map[key])
# output the previous paragraph
result += wrap_text(wrapme, indent+'// ', maxchars)
if hasemptyline:
# an empty line means a break between comments, so the comment is
# probably a section heading and should have an extra line before it
result = '\n' + result
return result
def format_translation_changes(old, new):
""" Return a comment stating what is different between the old and new
function prototype parts.
"""
changed = False
result = ''
# normalize C API attributes
oldargs = [x.replace('struct _', '') for x in old['args']]
oldretval = old['retval'].replace('struct _', '')
newargs = [x.replace('struct _', '') for x in new['args']]
newretval = new['retval'].replace('struct _', '')
# check if the prototype has changed
oldset = set(oldargs)
newset = set(newargs)
if len(oldset.symmetric_difference(newset)) > 0:
changed = True
result += '\n // WARNING - CHANGED ATTRIBUTES'
# in the implementation set only
oldonly = oldset.difference(newset)
for arg in oldonly:
result += '\n // REMOVED: '+arg
# in the current set only
newonly = newset.difference(oldset)
for arg in newonly:
result += '\n // ADDED: '+arg
# check if the return value has changed
if oldretval != newretval:
changed = True
result += '\n // WARNING - CHANGED RETURN VALUE'+ \
'\n // WAS: '+old['retval']+ \
'\n // NOW: '+new['retval']
if changed:
result += '\n #pragma message("Warning: "__FILE__": '+new['name']+ \
' prototype has changed")\n'
return result
def format_translation_includes(body):
""" Return the necessary list of includes based on the contents of the
body.
"""
result = ''
# identify what CppToC classes are being used
p = re.compile('([A-Za-z0-9_]{1,})CppToC')
list = sorted(set(p.findall(body)))
for item in list:
result += '#include "libcef_dll/cpptoc/'+ \
get_capi_name(item[3:], False)+'_cpptoc.h"\n'
# identify what CToCpp classes are being used
p = re.compile('([A-Za-z0-9_]{1,})CToCpp')
list = sorted(set(p.findall(body)))
for item in list:
result += '#include "libcef_dll/ctocpp/'+ \
get_capi_name(item[3:], False)+'_ctocpp.h"\n'
if body.find('transfer_') > 0:
result += '#include "libcef_dll/transfer_util.h"\n'
return result
def str_to_dict(str):
""" Convert a string to a dictionary. """
dict = {}
parts = string.split(str, ',')
for part in parts:
part = string.strip(part)
if len(part) == 0:
continue
sparts = string.split(part, '=')
if len(sparts) != 2:
raise Exception('Invalid dictionary pair format: '+part)
dict[string.strip(sparts[0])] = string.strip(sparts[1])
return dict
def dict_to_str(dict):
""" Convert a dictionary to a string. """
str = []
for name in dict.keys():
str.append(name+'='+dict[name])
return string.join(str, ',')
# regex for matching comment-formatted attributes
_cre_attrib = '/\*--cef\(([A-Za-z0-9_ ,=]{0,})\)--\*/'
# regex for matching class and function names
_cre_cfname = '([A-Za-z0-9_]{1,})'
# regex for matching typedef values and function return values
_cre_retval = '([A-Za-z0-9_<>:,\*\&]{1,})'
# regex for matching function return value and name combination
_cre_func = '([A-Za-z][A-Za-z0-9_<>:,\*\& ]{1,})'
# regex for matching virtual function modifiers
_cre_vfmod = '([A-Za-z0-9_]{0,})'
# regex for matching arbitrary whitespace
_cre_space = '[\s]{1,}'
def get_function_impls(content, ident):
""" Retrieve the function parts from the specified contents as a set of
return value, name, arguments and body. Ident must occur somewhere in
the value.
"""
# extract the functions
p = re.compile('\n'+_cre_func+'\((.*?)\)([A-Za-z0-9_\s]{0,})'+
'\{(.*?)\n\}',
re.MULTILINE | re.DOTALL)
list = p.findall(content)
# build the function map with the function name as the key
result = []
for retval, argval, vfmod, body in list:
if retval.find(ident) < 0:
# the identifier was not found
continue
# remove the identifier
retval = string.replace(retval, ident, '')
retval = string.strip(retval)
# retrieve the function name
parts = string.split(retval, ' ')
name = parts[-1]
del parts[-1]
retval = string.join(parts, ' ')
# parse the arguments
args = []
for v in string.split(argval, ','):
v = string.strip(v)
if len(v) > 0:
args.append(v)
result.append({
'retval' : string.strip(retval),
'name' : name,
'args' : args,
'vfmod' : string.strip(vfmod),
'body' : body
})
return result
def get_next_function_impl(existing, name):
result = None
for item in existing:
if item['name'] == name:
result = item
existing.remove(item)
break
return result
class obj_header:
""" Class representing a C++ header file. """
def __init__(self, filename):
self.filename = filename;
# read the input file into memory
data = read_file(filename)
# remove space from between template definition end brackets
data = data.replace("> >", ">>")
# extract global typedefs
p = re.compile('\ntypedef'+_cre_space+_cre_retval+
_cre_space+_cre_cfname+';',
re.MULTILINE | re.DOTALL)
list = p.findall(data)
# build the global typedef objects
self.typedefs = []
for value, alias in list:
self.typedefs.append(obj_typedef(self, value, alias))
# extract global functions
p = re.compile('\n'+_cre_attrib+'\n'+_cre_func+'\((.*?)\)',
re.MULTILINE | re.DOTALL)
list = p.findall(data)
# build the global function objects
self.funcs = []
for attrib, retval, argval in list:
comment = get_comment(data, retval+'('+argval+');')
self.funcs.append(obj_function(self, attrib, retval, argval,
comment))
# extract classes
p = re.compile('\n'+_cre_attrib+
'\nclass'+_cre_space+_cre_cfname+_cre_space+
':'+_cre_space+'public'+_cre_space+'virtual'+
_cre_space+'CefBase'+
'\n{(.*?)};', re.MULTILINE | re.DOTALL)
list = p.findall(data)
# build the class objects
self.classes = []
for attrib, name, body in list:
comment = get_comment(data, name+' : public virtual CefBase')
self.classes.append(
obj_class(self, attrib, name, body, comment))
def __repr__(self):
result = ''
if len(self.typedefs) > 0:
strlist = []
for cls in self.typedefs:
strlist.append(str(cls))
result += string.join(strlist, "\n") + "\n\n"
if len(self.funcs) > 0:
strlist = []
for cls in self.funcs:
strlist.append(str(cls))
result += string.join(strlist, "\n") + "\n\n"
if len(self.classes) > 0:
strlist = []
for cls in self.classes:
strlist.append(str(cls))
result += string.join(strlist, "\n")
return result
def get_file_name(self):
""" Return the file name. """
return self.filename
def get_typedefs(self):
""" Return the array of typedef objects. """
return self.typedefs
def get_funcs(self):
""" Return the array of function objects. """
return self.funcs
def get_classes(self):
""" Return the array of class objects. """
return self.classes
def get_class(self, classname, defined_structs = None):
""" Return the specified class or None if not found. """
for cls in self.classes:
if cls.get_name() == classname:
return cls
elif not defined_structs is None:
defined_structs.append(cls.get_capi_name())
return None
def get_class_names(self):
""" Returns the names of all classes in this object. """
result = []
for cls in self.classes:
result.append(cls.get_name())
return result
def get_types(self, list):
""" Return a dictionary mapping data types to analyzed values. """
for cls in self.typedefs:
cls.get_types(list)
for cls in self.classes:
cls.get_types(list)
def get_alias_translation(self, alias):
""" Return a translation of alias to value based on typedef
statements. """
for cls in self.typedefs:
if cls.alias == alias:
return cls.value
return None
def get_analysis(self, value, named = True):
""" Return an analysis of the value based the header file context. """
return obj_analysis([self], value, named)
def get_defined_structs(self):
""" Return a list of names already defined structure names. """
return ['cef_print_info_t', 'cef_window_info_t',
'cef_handler_menuinfo_t', 'cef_base_t']
def get_capi_translations(self):
""" Return a dictionary that maps C++ terminology to C API terminology.
"""
# strings that will be changed in C++ comments
map = {
'class' : 'structure',
'Class' : 'Structure',
'interface' : 'structure',
'Interface' : 'Structure',
'true' : 'true (1)',
'false' : 'false (0)',
'empty' : 'NULL',
'method' : 'function'
}
# add mappings for all classes and functions
funcs = self.get_funcs()
for func in funcs:
map[func.get_name()+'()'] = func.get_capi_name()+'()'
classes = self.get_classes()
for cls in classes:
map[cls.get_name()] = cls.get_capi_name()
funcs = cls.get_virtual_funcs()
for func in funcs:
map[func.get_name()+'()'] = func.get_capi_name()+'()'
funcs = cls.get_static_funcs()
for func in funcs:
map[func.get_name()+'()'] = func.get_capi_name()+'()'
return map
class obj_class:
""" Class representing a C++ class. """
def __init__(self, parent, attrib, name, body, comment):
if not isinstance(parent, obj_header):
raise Exception('Invalid parent object type')
self.parent = parent
self.attribs = str_to_dict(attrib)
self.name = name
self.comment = comment
# extract typedefs
p = re.compile('\n'+_cre_space+'typedef'+_cre_space+_cre_retval+
_cre_space+_cre_cfname+';',
re.MULTILINE | re.DOTALL)
list = p.findall(body)
# build the typedef objects
self.typedefs = []
for value, alias in list:
self.typedefs.append(obj_typedef(self, value, alias))
# extract static functions
p = re.compile('\n'+_cre_space+_cre_attrib+'\n'+_cre_space+'static'+
_cre_space+_cre_func+'\((.*?)\)',
re.MULTILINE | re.DOTALL)
list = p.findall(body)
# build the static function objects
self.staticfuncs = []
for attrib, retval, argval in list:
comment = get_comment(body, retval+'('+argval+')')
self.staticfuncs.append(
obj_function_static(self, attrib, retval, argval, comment))
# extract virtual functions
p = re.compile('\n'+_cre_space+_cre_attrib+'\n'+_cre_space+'virtual'+
_cre_space+_cre_func+'\((.*?)\)'+_cre_space+_cre_vfmod,
re.MULTILINE | re.DOTALL)
list = p.findall(body)
# build the virtual function objects
self.virtualfuncs = []
for attrib, retval, argval, vfmod in list:
comment = get_comment(body, retval+'('+argval+')')
self.virtualfuncs.append(
obj_function_virtual(self, attrib, retval, argval, comment,
vfmod))
def __repr__(self):
result = '/* '+dict_to_str(self.attribs)+' */ class '+self.name+"\n{"
if len(self.typedefs) > 0:
result += "\n\t"
strlist = []
for cls in self.typedefs:
strlist.append(str(cls))
result += string.join(strlist, "\n\t")
if len(self.staticfuncs) > 0:
result += "\n\t"
strlist = []
for cls in self.staticfuncs:
strlist.append(str(cls))
result += string.join(strlist, "\n\t")
if len(self.virtualfuncs) > 0:
result += "\n\t"
strlist = []
for cls in self.virtualfuncs:
strlist.append(str(cls))
result += string.join(strlist, "\n\t")
result += "\n};\n"
return result
def get_name(self):
""" Return the class name. """
return self.name;
def get_capi_name(self):
""" Return the CAPI structure name for this class. """
return get_capi_name(self.name, True)
def get_comment(self):
""" Return the class comment as an array of lines. """
return self.comment
def get_attribs(self):
""" Return the class attributes as a dictionary. """
return self.attribs;
def get_typedefs(self):
""" Return the array of typedef objects. """
return self.typedefs;
def get_static_funcs(self):
""" Return the array of static function objects. """
return self.staticfuncs;
def get_virtual_funcs(self):
""" Return the array of virtual function objects. """
return self.virtualfuncs;
def get_types(self, list):
""" Return a dictionary mapping data types to analyzed values. """
for cls in self.typedefs:
cls.get_types(list)
for cls in self.staticfuncs:
cls.get_types(list)
for cls in self.virtualfuncs:
cls.get_types(list)
def get_alias_translation(self, alias):
for cls in self.typedefs:
if cls.alias == alias:
return cls.value
return None
def get_analysis(self, value, named = True):
""" Return an analysis of the value based on the class definition
context.
"""
return obj_analysis([self, self.parent], value, named)
def is_library_side(self):
""" Returns true if the class is implemented by the library. """
return self.attribs['source'] == 'library'
def is_client_side(self):
""" Returns true if the class is implemented by the client. """
return self.attribs['source'] == 'client'
class obj_typedef:
""" Class representing a typedef statement. """
def __init__(self, parent, value, alias):
if not isinstance(parent, obj_header) \
and not isinstance(parent, obj_class):
raise Exception('Invalid parent object type')
self.parent = parent
self.alias = alias
self.value = self.parent.get_analysis(value, False)
def __repr__(self):
return 'typedef '+self.value.get_type()+' '+self.alias+';'
def get_alias(self):
""" Return the alias. """
return self.alias
def get_value(self):
""" Return an analysis of the value based on the class or header file
definition context.
"""
return self.value
def get_types(self, list):
""" Return a dictionary mapping data types to analyzed values. """
name = self.value.get_type()
if not name in list:
list[name] = self.value;
class obj_function:
""" Class representing a function. """
def __init__(self, parent, attrib, retval, argval, comment):
self.parent = parent
self.attribs = str_to_dict(attrib)
self.retval = obj_argument(self, retval)
self.name = self.retval.remove_name()
self.comment = comment
# build the argument objects
self.arguments = []
arglist = string.split(argval, ',')
for arg in arglist:
arg = string.strip(arg)
if len(arg) > 0:
self.arguments.append(obj_argument(self, arg))
def __repr__(self):
return '/* '+dict_to_str(self.attribs)+' */ '+self.get_cpp_proto()
def get_name(self):
""" Return the function name. """
return self.name
def get_capi_name(self, prefix = None):
""" Return the CAPI function name. """
if 'capi_name' in self.attribs:
return self.attribs['capi_name']
return get_capi_name(self.name, False, prefix)
def get_comment(self):
""" Return the function comment as an array of lines. """
return self.comment
def get_attribs(self):
""" Return the function attributes as a dictionary. """
return self.attribs
def get_retval(self):
""" Return the return value object. """
return self.retval
def get_arguments(self):
""" Return the argument array. """
return self.arguments
def get_types(self, list):
""" Return a dictionary mapping data types to analyzed values. """
for cls in self.arguments:
cls.get_types(list)
def get_capi_parts(self, defined_structs = [], prefix = None):
""" Return the parts of the C API function definition. """
retval = ''
dict = self.retval.get_type().get_capi(defined_structs)
if dict['format'] == 'single':
retval = dict['value']
name = self.get_capi_name(prefix)
args = []
if isinstance(self, obj_function_virtual):
# virtual functions get themselves as the first argument
str = 'struct _'+self.parent.get_capi_name()+'* self'
if isinstance(self, obj_function_virtual) and self.is_const():
# const virtual functions get const self pointers
str = 'const '+str
args.append(str)
if len(self.arguments) > 0:
for cls in self.arguments:
type = cls.get_type()
dict = type.get_capi(defined_structs)
if dict['format'] == 'single':
args.append(dict['value'])
elif dict['format'] == 'multi-arg':
# add an additional argument for the size of the array
type = type.get_name()
if type[-1] == 's':
type = type[:-1]
args.append('size_t '+type+'Count')
args.append(dict['value'])
elif dict['format'] == 'multi-func':
# change the function to return one value of the
# required type based on an index parameter
type = type.get_name()
if type[-1] == 's':
type = type[:-1]
args.append('int '+type+'Index')
retval = dict['value']
return { 'retval' : retval, 'name' : name, 'args' : args }
def get_capi_proto(self, defined_structs = [], prefix = None):
""" Return the prototype of the C API function. """
parts = self.get_capi_parts(defined_structs, prefix)
result = parts['retval']+' '+parts['name']+ \
'('+string.join(parts['args'], ', ')+')'
return result
def get_cpp_parts(self, isimpl = False):
""" Return the parts of the C++ function definition. """
retval = str(self.retval)
name = self.name
args = []
if len(self.arguments) > 0:
for cls in self.arguments:
args.append(str(cls))
if isimpl and isinstance(self, obj_function_virtual):
# enumeration return values must be qualified with the class name
type = self.get_retval().get_type()
if type.is_result_struct() and not type.is_byref() \
and not type.is_byaddr():
retval = self.parent.get_name()+'::'+retval
return { 'retval' : retval, 'name' : name, 'args' : args }
def get_cpp_proto(self, classname = None):
""" Return the prototype of the C++ function. """
parts = self.get_cpp_parts()
result = parts['retval']+' '
if not classname is None:
result += classname+'::'
result += parts['name']+'('+string.join(parts['args'], ', ')+')'
if isinstance(self, obj_function_virtual) and self.is_const():
result += ' const'
return result
class obj_function_static(obj_function):
""" Class representing a static function. """
def __init__(self, parent, attrib, retval, argval, comment):
if not isinstance(parent, obj_class):
raise Exception('Invalid parent object type')
obj_function.__init__(self, parent, attrib, retval, argval, comment)
def __repr__(self):
return 'static '+obj_function.__repr__(self)+';'
def get_capi_name(self, prefix = None):
""" Return the CAPI function name. """
if prefix is None:
# by default static functions are prefixed with the class name
prefix = get_capi_name(self.parent.get_name(), False)
return obj_function.get_capi_name(self, prefix)
class obj_function_virtual(obj_function):
""" Class representing a virtual function. """
def __init__(self, parent, attrib, retval, argval, comment, vfmod):
if not isinstance(parent, obj_class):
raise Exception('Invalid parent object type')
obj_function.__init__(self, parent, attrib, retval, argval, comment)
if vfmod == 'const':
self.isconst = True
else:
self.isconst = False
def __repr__(self):
return 'virtual '+obj_function.__repr__(self)+';'
def is_const(self):
""" Returns true if the method declaration is const. """
return self.isconst
class obj_argument:
""" Class representing a function argument. """
def __init__(self, parent, argval):
if not isinstance(parent, obj_function):
raise Exception('Invalid parent object type')
self.parent = parent
self.type = self.parent.parent.get_analysis(argval)
def __repr__(self):
result = ''
if self.type.is_const():
result += 'const '
result += self.type.get_type()
if self.type.is_byref():
result += '&'
elif self.type.is_byaddr():
result += '*'
if self.type.has_name():
result += ' '+self.type.get_name()
return result
def remove_name(self):
""" Remove and return the name value. """
name = self.type.get_name()
self.type.name = None
return name
def get_type(self):
""" Return an analysis of the argument type based on the class
definition context.
"""
return self.type
def get_types(self, list):
""" Return a dictionary mapping data types to analyzed values. """
name = self.type.get_type()
if not name in list:
list[name] = self.type
class obj_analysis:
""" Class representing an analysis of a data type value. """
def __init__(self, scopelist, value, named):
self.value = value
self.result_type = 'unknown'
self.result_value = None
# parse the argument string
partlist = string.split(string.strip(value))
if named == True:
# extract the name value
self.name = partlist[-1]
del partlist[-1]
else:
self.name = None
if len(partlist) == 0:
raise Exception('Invalid argument value: '+value)
# check const status
if partlist[0] == 'const':
self.isconst = True
del partlist[0]
else:
self.isconst = False
# combine the data type
self.type = string.join(partlist, ' ')
# extract the last character of the data type
endchar = self.type[-1]
# check if the value is passed by reference
if endchar == '&':
self.isbyref = True
self.type = self.type[:-1]
else:
self.isbyref = False
# check if the value is passed by address
if endchar == '*':
self.isbyaddr = True
self.type = self.type[:-1]
else:
self.isbyaddr = False
# see if the value is directly identifiable
if self._check_advanced(self.type) == True:
return
# not identifiable, so look it up
translation = None
for scope in scopelist:
if not isinstance(scope, obj_header) \
and not isinstance(scope, obj_class):
raise Exception('Invalid scope object type')
translation = scope.get_alias_translation(self.type)
if not translation is None:
break
if translation is None:
raise Exception('Failed to translate type: '+self.type)
# the translation succeeded so keep the result
self.result_type = translation.result_type
self.result_value = translation.result_value
def _check_advanced(self, value):
# check for vectors
if value.find('std::vector') == 0:
self.result_type = 'vector'
val = value[12:-1]
self.result_value = [
self._get_basic(val)
]
return True
# check for maps
if value.find('std::map') == 0:
self.result_type = 'map'
vals = string.split(value[9:-1], ',')
if len(vals) == 2:
self.result_value = [
self._get_basic(string.strip(vals[0])),
self._get_basic(string.strip(vals[1]))
]
return True
# check for basic types
basic = self._get_basic(value)
if not basic is None:
self.result_type = basic['result_type']
self.result_value = basic['result_value']
return True
return False
def _get_basic(self, value):
# check for string values
if value == "CefString":
return {
'result_type' : 'string',
'result_value' : None
}
# check for simple direct translations
simpletypes = {
'void' : 'void',
'int' : 'int',
'int64' : 'int64',
'uint64' : 'uint64',
'double' : 'double',
'long' : 'long',
'unsigned long' : 'unsigned long',
'size_t' : 'size_t',
'time_t' : 'time_t',
'bool' : 'int',
'CefCursorHandle' : 'cef_cursor_handle_t',
'CefWindowHandle' : 'cef_window_handle_t',
'CefRect' : 'cef_rect_t',
'CefThreadId' : 'cef_thread_id_t',
'CefTime' : 'cef_time_t',
}
if value in simpletypes.keys():
return {
'result_type' : 'simple',
'result_value' : simpletypes[value]
}
# check if already a C API structure
if value[-2:] == '_t':
return {
'result_type' : 'structure',
'result_value' : value
}
# check for CEF reference pointers
p = re.compile('^CefRefPtr<(.*?)>$', re.DOTALL)
list = p.findall(value)
if len(list) == 1:
return {
'result_type' : 'refptr',
'result_value' : get_capi_name(list[0], True)+'*'
}
# check for CEF structure types
if value[0:3] == 'Cef' and value[-4:] != 'List':
return {
'result_type' : 'structure',
'result_value' : get_capi_name(value, True)
}
return None
def __repr__(self):
return '('+self.result_type+') '+str(self.result_value)
def has_name(self):
""" Returns true if a name value exists. """
return (not self.name is None)
def get_name(self):
""" Return the name. """
return self.name
def get_value(self):
""" Return the name. """
return self.value
def get_type(self):
""" Return the type. """
return self.type
def is_const(self):
""" Returns true if the argument value is constant. """
return self.isconst
def is_byref(self):
""" Returns true if the argument is passed by reference. """
return self.isbyref
def is_byaddr(self):
""" Returns true if the argument is passed by address. """
return self.isbyaddr
def is_result_simple(self):
""" Returns true if this is a simple argument type. """
return (self.result_type == 'simple')
def get_result_simple_type(self):
""" Return the simple type. """
result = ''
if self.is_const():
result += 'const '
result += self.result_value
if self.is_byaddr() or self.is_byref():
result += '*'
return result
def is_result_refptr(self):
""" Returns true if this is a reference pointer type. """
return (self.result_type == 'refptr')
def get_result_refptr_type(self, defined_structs = []):
""" Return the refptr type. """
result = ''
if not self.result_value[:-1] in defined_structs:
result += 'struct _'
result += self.result_value
if self.is_byref() or self.is_byaddr():
result += '*'
return result
def is_result_struct(self):
""" Returns true if this is a structure type. """
return (self.result_type == 'structure')
def get_result_struct_type(self, defined_structs = []):
""" Return the structure or enumeration type. """
result = ''
# structure values that are passed by reference or address must be
# structures and not enumerations
if self.is_byref() or self.is_byaddr():
if self.is_const():
result += 'const '
if not self.result_value in defined_structs:
result += 'struct _'
else:
result += 'enum '
result += self.result_value
if self.is_byref() or self.is_byaddr():
result += '*'
return result
def is_result_string(self):
""" Returns true if this is a string type. """
return (self.result_type == 'string')
def get_result_string_type(self):
""" Return the string type. """
if not self.has_name():
# Return values are string structs that the user must free. Use
# the name of the structure as a hint.
return 'cef_string_userfree_t'
elif not self.is_const() and (self.is_byref() or self.is_byaddr()):
# Parameters passed by reference or address. Use the normal
# non-const string struct.
return 'cef_string_t*'
# Const parameters use the const string struct.
return 'const cef_string_t*'
def is_result_vector(self):
""" Returns true if this is a vector type. """
return (self.result_type == 'vector')
def get_result_vector_type(self, defined_structs = []):
""" Return the vector type. """
if not self.has_name():
raise Exception('Cannot use vector as a return type')
type = self.result_value[0]['result_type']
value = self.result_value[0]['result_value']
result = {}
if type == 'string':
result['value'] = 'cef_string_list_t'
result['format'] = 'single'
return result
if type == 'simple':
result['value'] = value
elif type == 'refptr':
str = ''
if not value[:-1] in defined_structs:
str += 'struct _'
str += value
if self.is_const():
str += ' const*'
result['value'] = str
else:
raise Exception('Unsupported vector type: '+type)
if self.is_const():
# const vector values must be passed as the value array parameter
# and a size parameter
result['format'] = 'multi-arg'
else:
# non-const vector values must be passed as one function to get the
# size and another function to get the element at a specified index
result['format'] = 'multi-func'
return result
def is_result_map(self):
""" Returns true if this is a map type. """
return (self.result_type == 'map')
def get_result_map_type(self, defined_structs = []):
""" Return the map type. """
if not self.has_name():
raise Exception('Cannot use map as a return type')
if self.result_value[0]['result_type'] == 'string' \
and self.result_value[1]['result_type'] == 'string':
return {
'value' : 'cef_string_map_t',
'format' : 'single'
}
raise Exception('Only mappings of strings to strings are supported')
def get_capi(self, defined_structs = []):
""" Format the value for the C API. """
result = ''
format = 'single'
if self.is_result_simple():
result += self.get_result_simple_type()
elif self.is_result_refptr():
result += self.get_result_refptr_type(defined_structs)
elif self.is_result_struct():
result += self.get_result_struct_type(defined_structs)
elif self.is_result_string():
result += self.get_result_string_type()
elif self.is_result_map():
resdict = self.get_result_map_type(defined_structs)
if resdict['format'] == 'single':
result += resdict['value']
else:
raise Exception('Only single-value map types are supported')
elif self.is_result_vector():
resdict = self.get_result_vector_type(defined_structs)
if resdict['format'] != 'single':
format = resdict['format']
result += resdict['value']
if self.has_name() and format != 'multi-func':
result += ' '+self.get_name();
return {'format' : format, 'value' : result}
# test the module
if __name__ == "__main__":
import pprint
import sys
# verify that the correct number of command-line arguments are provided
if len(sys.argv) != 2:
sys.stderr.write('Usage: '+sys.argv[0]+' <infile>')
sys.exit()
pp = pprint.PrettyPrinter(indent=4)
# create the header object
header = obj_header(sys.argv[1])
# output the type mapping
types = {}
header.get_types(types)
pp.pprint(types)
sys.stdout.write('\n')
# output the parsed C++ data
sys.stdout.write(wrap_code(str(header), '\t'))
# output the C API formatted data
defined_names = header.get_defined_structs()
result = ''
# global functions
funcs = header.get_funcs()
if len(funcs) > 0:
for func in funcs:
result += func.get_capi_proto(defined_names)+';\n'
result += '\n'
classes = header.get_classes()
for cls in classes:
# virtual functions are inside a structure
result += 'struct '+cls.get_capi_name()+'\n{\n'
funcs = cls.get_virtual_funcs()
if len(funcs) > 0:
for func in funcs:
result += '\t'+func.get_capi_proto(defined_names)+';\n'
result += '}\n\n'
defined_names.append(cls.get_capi_name())
# static functions become global
funcs = cls.get_static_funcs()
if len(funcs) > 0:
for func in funcs:
result += func.get_capi_proto(defined_names)+';\n'
result += '\n'
sys.stdout.write(wrap_code(result, '\t'))