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# -*- Mode: Python; py-indent-offset: 4 -*-
# this file contains code for loading up an override file. The override file
# provides implementations of functions where the code generator could not
# do its job correctly.
import fnmatch
import os
import re
import string
import sys
def class2cname(klass, method):
c_name = ''
for c in klass:
if c.isupper():
c_name += '_' + c.lower()
else:
c_name += c
return c_name[1:] + '_' + method
# import python_type as c_name [for arg_type]
# Last ('for') clause is optional. If present, the type will be
# imported only if given 'arg_type' is registered.
import_pat = re.compile(r'\s*import\s+(\S+)\.([^\s.]+)\s+as\s+(\S+)(\s+for\s+(\S+))?')
class Overrides:
def __init__(self, filename=None):
self.modulename = None
self.ignores = {}
self.glob_ignores = []
self.type_ignores = {}
self.overrides = {}
self.overridden = {}
self.kwargs = {}
self.noargs = {}
self.onearg = {}
self.staticmethod = {}
self.classmethod = {}
self.startlines = {}
self.override_attrs = {}
self.override_slots = {}
self.headers = ''
self.body = ''
self.init = ''
self.imports = []
self.defines = {}
self.functions = {}
self.newstyle_constructors = {}
self.dynamicnamespace = False
if filename:
self.handle_file(filename)
def handle_file(self, filename):
oldpath = os.getcwd()
fp = open(filename, 'r')
dirname = os.path.dirname(os.path.abspath(filename))
if dirname != oldpath:
os.chdir(dirname)
# read all the components of the file ...
bufs = []
startline = 1
lines = []
line = fp.readline()
linenum = 1
while line:
if line == '%%\n' or line == '%%':
if lines:
bufs.append((''.join(lines), startline))
startline = linenum + 1
lines = []
else:
lines.append(line)
line = fp.readline()
linenum = linenum + 1
if lines:
bufs.append((''.join(lines), startline))
if not bufs: return
for buf, startline in bufs:
self.__parse_override(buf, startline, filename)
os.chdir(oldpath)
def __parse_override(self, buffer, startline, filename):
pos = buffer.find('\n')
if pos >= 0:
line = buffer[:pos]
rest = buffer[pos+1:]
else:
line = buffer ; rest = ''
words = line.split()
command = words[0]
if (command == 'ignore' or
command == 'ignore-' + sys.platform):
"ignore/ignore-platform [functions..]"
for func in words[1:]:
self.ignores[func] = 1
for func in rest.split():
self.ignores[func] = 1
elif (command == 'ignore-glob' or
command == 'ignore-glob-' + sys.platform):
"ignore-glob/ignore-glob-platform [globs..]"
for func in words[1:]:
self.glob_ignores.append(func)
for func in rest.split():
self.glob_ignores.append(func)
elif (command == 'ignore-type' or
command == 'ignore-type-' + sys.platform):
"ignore-type/ignore-type-platform [typenames..]"
for typename in words[1:]:
self.type_ignores[typename] = 1
for typename in rest.split():
self.type_ignores[typename] = 1
elif command == 'override':
"override function/method [kwargs|noargs|onearg] [staticmethod|classmethod]"
func = words[1]
if 'kwargs' in words[1:]:
self.kwargs[func] = 1
elif 'noargs' in words[1:]:
self.noargs[func] = 1
elif 'onearg' in words[1:]:
self.onearg[func] = True
if 'staticmethod' in words[1:]:
self.staticmethod[func] = True
elif 'classmethod' in words[1:]:
self.classmethod[func] = True
if func in self.overrides:
raise RuntimeError("Function %s is being overridden more than once" % (func,))
self.overrides[func] = rest
self.startlines[func] = (startline + 1, filename)
elif command == 'override-attr':
"override-slot Class.attr"
attr = words[1]
self.override_attrs[attr] = rest
self.startlines[attr] = (startline + 1, filename)
elif command == 'override-slot':
"override-slot Class.slot"
slot = words[1]
self.override_slots[slot] = rest
self.startlines[slot] = (startline + 1, filename)
elif command == 'headers':
"headers"
self.headers = '%s\n#line %d "%s"\n%s' % \
(self.headers, startline + 1, filename, rest)
elif command == 'body':
"body"
self.body = '%s\n#line %d "%s"\n%s' % \
(self.body, startline + 1, filename, rest)
elif command == 'init':
"init"
self.init = '%s\n#line %d "%s"\n%s' % \
(self.init, startline + 1, filename, rest)
elif command == 'modulename':
"modulename name"
self.modulename = words[1]
elif command == 'include':
"include filename"
for filename in words[1:]:
self.handle_file(filename)
for filename in rest.split():
self.handle_file(filename)
elif command == 'import':
"import module1 [\n module2, \n module3 ...]"
for line in buffer.split('\n'):
match = import_pat.match(line)
if match:
module, pyname, cname, conditional, importing_for = match.groups()
self.imports.append((module, pyname, cname, importing_for or None))
elif command == 'define':
"define funcname [kwargs|noargs|onearg] [classmethod|staticmethod]"
"define Class.method [kwargs|noargs|onearg] [classmethod|staticmethod]"
func = words[1]
klass = None
if func.find('.') != -1:
klass, func = func.split('.', 1)
if klass not in self.defines:
self.defines[klass] = {}
self.defines[klass][func] = rest
else:
self.functions[func] = rest
if 'kwargs' in words[1:]:
self.kwargs[func] = 1
elif 'noargs' in words[1:]:
self.noargs[func] = 1
elif 'onearg' in words[1:]:
self.onearg[func] = 1
if 'staticmethod' in words[1:]:
self.staticmethod[func] = True
elif 'classmethod' in words[1:]:
self.classmethod[func] = True
self.startlines[func] = (startline + 1, filename)
elif command == 'new-constructor':
"new-constructor GType"
gtype, = words[1:]
self.newstyle_constructors[gtype] = True
elif command == 'options':
for option in words[1:]:
if option == 'dynamicnamespace':
self.dynamicnamespace = True
def is_ignored(self, name):
if name in self.ignores:
return 1
for glob in self.glob_ignores:
if fnmatch.fnmatchcase(name, glob):
return 1
return 0
def is_type_ignored(self, name):
return name in self.type_ignores
def is_overriden(self, name):
return name in self.overrides
def is_already_included(self, name):
return name in self.overridden
def override(self, name):
self.overridden[name] = 1
return self.overrides[name]
def define(self, klass, name):
self.overridden[class2cname(klass, name)] = 1
return self.defines[klass][name]
def function(self, name):
return self.functions[name]
def getstartline(self, name):
return self.startlines[name]
def wants_kwargs(self, name):
return name in self.kwargs
def wants_noargs(self, name):
return name in self.noargs
def wants_onearg(self, name):
return name in self.onearg
def is_staticmethod(self, name):
return name in self.staticmethod
def is_classmethod(self, name):
return name in self.classmethod
def attr_is_overriden(self, attr):
return attr in self.override_attrs
def attr_override(self, attr):
return self.override_attrs[attr]
def slot_is_overriden(self, slot):
return slot in self.override_slots
def slot_override(self, slot):
return self.override_slots[slot]
def get_headers(self):
return self.headers
def get_body(self):
return self.body
def get_init(self):
return self.init
def get_imports(self):
return self.imports
def get_defines_for(self, klass):
return self.defines.get(klass, {})
def get_functions(self):
return self.functions
|
