/usr/share/pygobject/2.0/codegen/reversewrapper.py is in python-gobject-2-dev 2.28.6-10ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 | ### -*- python -*-
### Code to generate "Reverse Wrappers", i.e. C->Python wrappers
### (C) 2004 Gustavo Carneiro <gjc@gnome.org>
import argtypes
import os
DEBUG_MODE = ('PYGTK_CODEGEN_DEBUG' in os.environ)
def join_ctype_name(ctype, name):
'''Joins a C type and a variable name into a single string'''
if ctype[-1] != '*':
return " ".join((ctype, name))
else:
return "".join((ctype, name))
class CodeSink(object):
def __init__(self):
self.indent_level = 0 # current indent level
self.indent_stack = [] # previous indent levels
def _format_code(self, code):
assert isinstance(code, str)
l = []
for line in code.split('\n'):
l.append(' '*self.indent_level + line)
if l[-1]:
l.append('')
return '\n'.join(l)
def writeln(self, line=''):
raise NotImplementedError
def indent(self, level=4):
'''Add a certain ammount of indentation to all lines written
from now on and until unindent() is called'''
self.indent_stack.append(self.indent_level)
self.indent_level += level
def unindent(self):
'''Revert indentation level to the value before last indent() call'''
self.indent_level = self.indent_stack.pop()
class FileCodeSink(CodeSink):
def __init__(self, fp):
CodeSink.__init__(self)
assert isinstance(fp, file)
self.fp = fp
def writeln(self, line=''):
self.fp.write(self._format_code(line))
class MemoryCodeSink(CodeSink):
def __init__(self):
CodeSink.__init__(self)
self.lines = []
def writeln(self, line=''):
self.lines.append(self._format_code(line))
def flush_to(self, sink):
assert isinstance(sink, CodeSink)
for line in self.lines:
sink.writeln(line.rstrip())
self.lines = []
def flush(self):
l = []
for line in self.lines:
l.append(self._format_code(line))
self.lines = []
return "".join(l)
class ReverseWrapper(object):
'''Object that generates a C->Python wrapper'''
def __init__(self, cname, is_static=True):
assert isinstance(cname, str)
self.cname = cname
## function object we will call, or object whose method we will call
self.called_pyobj = None
## name of method of self.called_pyobj we will call
self.method_name = None
self.is_static = is_static
self.parameters = []
self.declarations = MemoryCodeSink()
self.post_return_code = MemoryCodeSink()
self.body = MemoryCodeSink()
self.check_exception_code = MemoryCodeSink()
self.cleanup_actions = []
self.pyargv_items = []
self.pyargv_optional_items = []
self.pyret_parse_items = [] # list of (format_spec, parameter)
self.code_sinks_stack = [self.body]
def set_call_target(self, called_pyobj, method_name=None):
assert called_pyobj is not None
assert self.called_pyobj is None
self.called_pyobj = called_pyobj
self.method_name = method_name
def set_return_type(self, return_type):
assert isinstance(return_type, ReturnType)
self.return_type = return_type
def add_parameter(self, param):
assert isinstance(param, Parameter)
self.parameters.append(param)
def add_declaration(self, decl_code):
self.declarations.writeln(decl_code)
def add_pyargv_item(self, variable, optional=False):
if optional:
self.pyargv_optional_items.append(variable)
else:
self.pyargv_items.append(variable)
def add_pyret_parse_item(self, format_specifier, parameter, prepend=False):
if prepend:
self.pyret_parse_items.insert(0, (format_specifier, parameter))
else:
self.pyret_parse_items.append((format_specifier, parameter))
def push_code_sink(self, code_sink):
self.code_sinks_stack.insert(0, code_sink)
def pop_code_sink(self):
return self.code_sinks_stack.pop(0)
def write_code(self, code,
cleanup=None,
failure_expression=None,
failure_cleanup=None,
failure_exception=None,
code_sink=None):
'''Add a chunk of code with cleanup and error handling
This method is to be used by TypeHandlers when generating code
Keywork arguments:
code -- code to add
cleanup -- code to cleanup any dynamic resources created by @code
(except in case of failure) (default None)
failure_expression -- C boolean expression to indicate
if anything failed (default None)
failure_cleanup -- code to cleanup any dynamic resources
created by @code in case of failure (default None)
failure_exception -- code to raise an exception in case of
failure (which will be immediately
printed and cleared), (default None)
code_sink -- "code sink" to use; by default,
ReverseWrapper.body is used, which writes the
main body of the wrapper, before calling the
python method. Alternatively,
ReverseWrapper.after_pyret_parse can be used, to
write code after the PyArg_ParseTuple that
parses the python method return value.
'''
if code_sink is None:
code_sink = self.code_sinks_stack[0]
if code is not None:
code_sink.writeln(code)
if failure_expression is not None:
code_sink.writeln("if (%s) {" % (failure_expression,))
code_sink.indent()
if failure_exception is None:
code_sink.writeln("if (PyErr_Occurred())")
code_sink.indent()
code_sink.writeln("PyErr_Print();")
code_sink.unindent()
else:
code_sink.writeln(failure_exception)
code_sink.writeln("PyErr_Print();")
if failure_cleanup is not None:
code_sink.writeln(failure_cleanup)
for cleanup_action in self.cleanup_actions:
code_sink.writeln(cleanup_action)
self.push_code_sink(code_sink)
try:
self.return_type.write_error_return()
finally:
self.pop_code_sink()
code_sink.unindent()
code_sink.writeln("}")
if cleanup is not None:
self.cleanup_actions.insert(0, cleanup)
def generate(self, sink):
'''Generate the code into a CodeSink object'''
assert isinstance(sink, CodeSink)
if DEBUG_MODE:
self.declarations.writeln("/* begin declarations */")
self.body.writeln("/* begin main body */")
self.post_return_code.writeln("/* begin post-return code */")
self.add_declaration("PyGILState_STATE __py_state;")
self.write_code(code="__py_state = pyg_gil_state_ensure();",
cleanup="pyg_gil_state_release(__py_state);")
for param in self.parameters:
param.convert_c2py()
assert self.called_pyobj is not None,\
"Parameters failed to provide a target function or method."
if self.is_static:
sink.writeln('static %s' % self.return_type.get_c_type())
else:
sink.writeln(self.return_type.get_c_type())
c_proto_params = map(Parameter.format_for_c_proto, self.parameters)
sink.writeln("%s(%s)\n{" % (self.cname, ", ".join(c_proto_params)))
self.return_type.write_decl()
self.add_declaration("PyObject *py_retval;")
## Handle number of arguments
if self.pyargv_items:
self.add_declaration("PyObject *py_args;")
py_args = "py_args"
if self.pyargv_optional_items:
self.add_declaration("int argc = %i;" % len(self.pyargv_items))
argc = "argc"
for arg in self.pyargv_optional_items:
self.body.writeln("if (%s)" % arg)
self.body.indent()
self.body.writeln("++argc;")
self.body.unindent()
else:
argc = str(len(self.pyargv_items))
else:
if self.pyargv_optional_items:
self.add_declaration("PyObject *py_args;")
py_args = "py_args"
self.add_declaration("int argc = 0;")
argc = "argc"
for arg in self.pyargv_optional_items:
self.body.writeln("if (%s)" % arg)
self.body.indent()
self.body.writeln("++argc;")
self.body.unindent()
else:
py_args = "NULL"
argc = None
self.body.writeln()
if py_args != "NULL":
self.write_code("py_args = PyTuple_New(%s);" % argc,
cleanup="Py_DECREF(py_args);")
pos = 0
for arg in self.pyargv_items:
try: # try to remove the Py_DECREF cleanup action, if we can
self.cleanup_actions.remove("Py_DECREF(%s);" % arg)
except ValueError: # otherwise we have to Py_INCREF..
self.body.writeln("Py_INCREF(%s);" % arg)
self.body.writeln("PyTuple_SET_ITEM(%s, %i, %s);" % (py_args, pos, arg))
pos += 1
for arg in self.pyargv_optional_items:
self.body.writeln("if (%s) {" % arg)
self.body.indent()
try: # try to remove the Py_DECREF cleanup action, if we can
self.cleanup_actions.remove("Py_XDECREF(%s);" % arg)
except ValueError: # otherwise we have to Py_INCREF..
self.body.writeln("Py_INCREF(%s);" % arg)
self.body.writeln("PyTuple_SET_ITEM(%s, %i, %s);" % (py_args, pos, arg))
self.body.unindent()
self.body.writeln("}")
pos += 1
self.body.writeln()
## Call the python method
if self.method_name is None:
self.write_code("py_retval = PyObject_Call(%s, %s);"
% (self.called_pyobj, py_args),
cleanup="Py_XDECREF(py_retval);")
self.check_exception_code.flush_to(self.body)
self.write_code(None, failure_expression="!py_retval")
else:
self.add_declaration("PyObject *py_method;")
self.write_code("py_method = PyObject_GetAttrString(%s, \"%s\");"
% (self.called_pyobj, self.method_name),
cleanup="Py_DECREF(py_method);",
failure_expression="!py_method")
self.write_code("py_retval = PyObject_CallObject(py_method, %s);"
% (py_args,),
cleanup="Py_XDECREF(py_retval);")
self.check_exception_code.flush_to(self.body)
self.write_code(None, failure_expression="!py_retval")
## -- Handle the return value --
## we need to check if the return_type object is prepared to cooperate with multiple return values
len_before = len(self.pyret_parse_items)
self.return_type.write_conversion()
len_after = len(self.pyret_parse_items)
assert (self.return_type.get_c_type() == 'void'
or not (len_before == len_after and len_after > 0)),\
("Bug in reverse wrappers: return type handler %s"
" is not prepared to cooperate multiple return values") % (type(self.return_type),)
sink.indent()
if self.pyret_parse_items == [("", "")]:
## special case when there are no return parameters
self.write_code(
code=None,
failure_expression='py_retval != Py_None',
failure_exception=('PyErr_SetString(PyExc_TypeError, '
'"virtual method should return None");'))
else:
if len(self.pyret_parse_items) == 1:
## if retval is one item only, pack it in a tuple so we
## can use PyArg_ParseTuple as usual..
self.write_code('py_retval = Py_BuildValue("(N)", py_retval);')
if len(self.pyret_parse_items) > 0:
## Parse return values using PyArg_ParseTuple
params = ["py_retval",
'"%s"' % "".join([format for format, param in self.pyret_parse_items])]
params.extend([param for format, param in self.pyret_parse_items if param])
self.write_code(code=None, failure_expression=(
'!PyArg_ParseTuple(%s)' % (', '.join(params),)))
if DEBUG_MODE:
self.declarations.writeln("/* end declarations */")
self.declarations.flush_to(sink)
sink.writeln()
if DEBUG_MODE:
self.body.writeln("/* end main body */")
self.body.flush_to(sink)
sink.writeln()
if DEBUG_MODE:
self.post_return_code.writeln("/* end post-return code */")
self.post_return_code.flush_to(sink)
sink.writeln()
for cleanup_action in self.cleanup_actions:
sink.writeln(cleanup_action)
if self.return_type.get_c_type() != 'void':
sink.writeln()
sink.writeln("return retval;")
sink.unindent()
sink.writeln("}")
class TypeHandler(object):
def __init__(self, wrapper, **props):
assert isinstance(wrapper, ReverseWrapper)
self.wrapper = wrapper
self.props = props
class ReturnType(TypeHandler):
supports_optional = False
def get_c_type(self):
raise NotImplementedError
def write_decl(self):
raise NotImplementedError
def write_error_return(self):
'''Write "return <value>" code in case of error'''
raise NotImplementedError
def write_conversion(self):
'''Writes code to convert Python return value in 'py_retval'
into C 'retval'. Returns a string with C boolean expression
that determines if anything went wrong. '''
raise NotImplementedError
class Parameter(TypeHandler):
def __init__(self, wrapper, name, **props):
TypeHandler.__init__(self, wrapper, **props)
self.name = name
def get_c_type(self):
raise NotImplementedError
def convert_c2py(self):
'''Write some code before calling the Python method.'''
pass
def format_for_c_proto(self):
return join_ctype_name(self.get_c_type(), self.name)
###---
class StringParam(Parameter):
def get_c_type(self):
return self.props.get('c_type', 'char *').replace('const-', 'const ')
def convert_c2py(self):
if self.props.get('optional', False):
self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
self.wrapper.write_code(code=("if (%s)\n"
" py_%s = PyString_FromString(%s);\n"
% (self.name, self.name, self.name)),
cleanup=("Py_XDECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name, optional=True)
elif self.props.get('nullok', False):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("if (%s)\n"
" py_%s = PyString_FromString(%s);\n"
"else {\n"
" Py_INCREF(Py_None);\n"
" py_%s = Py_None;\n"
"}\n"
% (self.name, self.name, self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
else:
self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
self.wrapper.write_code(code=("if (%s)\n"
" py_%s = PyString_FromString(%s);\n" %
(self.name, self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name),
failure_expression=("!py_%s" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
for ctype in ('char*', 'gchar*', 'const-char*', 'char-const*', 'const-gchar*',
'gchar-const*', 'string', 'static_string'):
argtypes.matcher.register_reverse(ctype, StringParam)
del ctype
class StringReturn(ReturnType):
def get_c_type(self):
return self.props.get('c_type', 'char *').replace('const-', 'const ')
#return "char *"
def write_decl(self):
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
#self.wrapper.add_declaration("char *retval;")
def write_error_return(self):
self.wrapper.write_code("return NULL;")
def write_conversion(self):
self.wrapper.add_pyret_parse_item("s", "&retval", prepend=True)
self.wrapper.write_code("retval = g_strdup(retval);", code_sink=self.wrapper.post_return_code)
for ctype in ('char*', 'gchar*', 'const-gchar*'):
argtypes.matcher.register_reverse_ret(ctype, StringReturn)
del ctype
class VoidReturn(ReturnType):
def get_c_type(self):
return "void"
def write_decl(self):
pass
def write_error_return(self):
self.wrapper.write_code("return;")
def write_conversion(self):
self.wrapper.add_pyret_parse_item("", "", prepend=True)
argtypes.matcher.register_reverse_ret('void', VoidReturn)
argtypes.matcher.register_reverse_ret('none', VoidReturn)
class GObjectParam(Parameter):
def get_c_type(self):
return self.props.get('c_type', 'GObject *')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
self.wrapper.write_code(code=("if (%s)\n"
" py_%s = pygobject_new((GObject *) %s);\n"
"else {\n"
" Py_INCREF(Py_None);\n"
" py_%s = Py_None;\n"
"}"
% (self.name, self.name, self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse('GObject*', GObjectParam)
class GObjectReturn(ReturnType):
supports_optional = True
def get_c_type(self):
return self.props.get('c_type', 'GObject *')
def write_decl(self):
if not self.props.get('optional'):
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
else:
self.wrapper.add_declaration("%s retval = NULL;" % self.get_c_type())
def write_error_return(self):
self.wrapper.write_code("return NULL;")
def write_conversion(self):
if not self.props.get('optional'):
self.wrapper.write_code(
code=None,
failure_expression="!PyObject_TypeCheck(py_retval, &PyGObject_Type)",
failure_exception='PyErr_SetString(PyExc_TypeError, "retval should be a GObject");')
self.wrapper.write_code("retval = (%s) pygobject_get(py_retval);"
% self.get_c_type())
self.wrapper.write_code("g_object_ref((GObject *) retval);")
else:
self.wrapper.write_code(
code=None,
failure_expression="py_retval != Py_None && !PyObject_TypeCheck(py_retval, &PyGObject_Type)",
failure_exception='PyErr_SetString(PyExc_TypeError, "retval should be None or a GObject");')
self.wrapper.write_code("if (py_retval != Py_None) {\n"
" retval = (%s) pygobject_get(py_retval);\n"
" g_object_ref((GObject *) retval);\n"
"}\n"
% self.get_c_type())
argtypes.matcher.register_reverse_ret('GObject*', GObjectReturn)
class IntParam(Parameter):
def get_c_type(self):
return self.props.get('c_type', 'int')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("py_%s = PyInt_FromLong(%s);" %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
class IntReturn(ReturnType):
def get_c_type(self):
return self.props.get('c_type', 'int')
def write_decl(self):
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
def write_error_return(self):
self.wrapper.write_code("return -G_MAXINT;")
def write_conversion(self):
self.wrapper.add_pyret_parse_item("i", "&retval", prepend=True)
for argtype in ('int', 'gint', 'guint', 'short', 'gshort', 'gushort', 'long',
'glong', 'gsize', 'gssize', 'guint8', 'gint8', 'guint16',
'gint16', 'gint32', 'GTime'):
argtypes.matcher.register_reverse(argtype, IntParam)
argtypes.matcher.register_reverse_ret(argtype, IntReturn)
del argtype
class IntPtrParam(Parameter):
def __init__(self, wrapper, name, **props):
if "direction" not in props:
raise argtypes.ArgTypeConfigurationError(
"cannot use int* parameter without direction")
if props["direction"] not in ("out", "inout"):
raise argtypes.ArgTypeConfigurationError(
"cannot use int* parameter with direction '%s'"
% (props["direction"],))
Parameter.__init__(self, wrapper, name, **props)
def get_c_type(self):
return self.props.get('c_type', 'int*')
def convert_c2py(self):
if self.props["direction"] == "inout":
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("py_%s = PyInt_FromLong(*%s);" %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
self.wrapper.add_pyret_parse_item("i", self.name)
for argtype in ('int*', 'gint*'):
argtypes.matcher.register_reverse(argtype, IntPtrParam)
del argtype
class GEnumReturn(IntReturn):
def write_conversion(self):
self.wrapper.write_code(
code=None,
failure_expression=(
"pyg_enum_get_value(%s, py_retval, (gint *)&retval)"
% (self.props['typecode'],)))
argtypes.matcher.register_reverse_ret("GEnum", GEnumReturn)
class GEnumParam(IntParam):
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("py_%s = pyg_enum_from_gtype(%s, %s);" %
(self.name, self.props['typecode'], self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name),
failure_expression=("!py_%s" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("GEnum", GEnumParam)
class GFlagsReturn(IntReturn):
def write_conversion(self):
self.wrapper.write_code(
code=None,
failure_expression=(
"pyg_flags_get_value(%s, py_retval, (gint *)&retval)" %
self.props['typecode']))
argtypes.matcher.register_reverse_ret("GFlags", GFlagsReturn)
class GFlagsParam(IntParam):
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=(
"py_%s = pyg_flags_from_gtype(%s, %s);" %
(self.name, self.props['typecode'], self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name),
failure_expression=("!py_%s" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("GFlags", GFlagsParam)
class GtkTreePathParam(IntParam):
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=(
"py_%s = pygtk_tree_path_to_pyobject(%s);" %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name),
failure_expression=("!py_%s" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("GtkTreePath*", GtkTreePathParam)
class GtkTreePathReturn(ReturnType):
def get_c_type(self):
return self.props.get('c_type', 'GtkTreePath *')
def write_decl(self):
self.wrapper.add_declaration("GtkTreePath * retval;")
def write_error_return(self):
self.wrapper.write_code("return NULL;")
def write_conversion(self):
self.wrapper.write_code(
"retval = pygtk_tree_path_from_pyobject(py_retval);\n",
failure_expression=('!retval'),
failure_exception=(
'PyErr_SetString(PyExc_TypeError, "retval should be a GtkTreePath");'))
argtypes.matcher.register_reverse_ret("GtkTreePath*", GtkTreePathReturn)
class BooleanReturn(ReturnType):
def get_c_type(self):
return "gboolean"
def write_decl(self):
self.wrapper.add_declaration("gboolean retval;")
self.wrapper.add_declaration("PyObject *py_main_retval;")
def write_error_return(self):
self.wrapper.write_code("return FALSE;")
def write_conversion(self):
self.wrapper.add_pyret_parse_item("O", "&py_main_retval", prepend=True)
self.wrapper.write_code(
"retval = PyObject_IsTrue(py_main_retval)? TRUE : FALSE;",
code_sink=self.wrapper.post_return_code)
argtypes.matcher.register_reverse_ret("gboolean", BooleanReturn)
class BooleanParam(Parameter):
def get_c_type(self):
return "gboolean"
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code("py_%s = %s? Py_True : Py_False;"
% (self.name, self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("gboolean", BooleanParam)
class DoubleParam(Parameter):
def get_c_type(self):
return self.props.get('c_type', 'gdouble')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("py_%s = PyFloat_FromDouble(%s);" %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
class DoublePtrParam(Parameter):
def __init__(self, wrapper, name, **props):
if "direction" not in props:
raise argtypes.ArgTypeConfigurationError(
"cannot use double* parameter without direction")
if props["direction"] not in ("out", ): # inout not yet implemented
raise argtypes.ArgTypeConfigurationError(
"cannot use double* parameter with direction '%s'"
% (props["direction"],))
Parameter.__init__(self, wrapper, name, **props)
def get_c_type(self):
return self.props.get('c_type', 'double*')
def convert_c2py(self):
self.wrapper.add_pyret_parse_item("d", self.name)
for argtype in ('double*', 'gdouble*'):
argtypes.matcher.register_reverse(argtype, DoublePtrParam)
del argtype
class DoubleReturn(ReturnType):
def get_c_type(self):
return self.props.get('c_type', 'gdouble')
def write_decl(self):
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
def write_error_return(self):
self.wrapper.write_code("return -G_MAXFLOAT;")
def write_conversion(self):
self.wrapper.add_pyret_parse_item("d", "&retval", prepend=True)
for argtype in ('float', 'double', 'gfloat', 'gdouble'):
argtypes.matcher.register_reverse(argtype, DoubleParam)
argtypes.matcher.register_reverse_ret(argtype, DoubleReturn)
class GBoxedParam(Parameter):
def get_c_type(self):
return self.props.get('c_type').replace('const-', 'const ')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
ctype = self.get_c_type()
if ctype.startswith('const '):
ctype_no_const = ctype[len('const '):]
self.wrapper.write_code(
code=('py_%s = pyg_boxed_new(%s, (%s) %s, TRUE, TRUE);' %
(self.name, self.props['typecode'],
ctype_no_const, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
else:
self.wrapper.write_code(
code=('py_%s = pyg_boxed_new(%s, %s, FALSE, FALSE);' %
(self.name, self.props['typecode'], self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("GBoxed", GBoxedParam)
class GBoxedReturn(ReturnType):
def get_c_type(self):
return self.props.get('c_type')
def write_decl(self):
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
def write_error_return(self):
self.wrapper.write_code("return retval;")
def write_conversion(self):
self.wrapper.write_code(code = None,
failure_expression=("!pyg_boxed_check(py_retval, %s)" %
(self.props['typecode'],)),
failure_exception=(
'PyErr_SetString(PyExc_TypeError, "retval should be a %s");'
% (self.props['typename'],)))
self.wrapper.write_code('retval = pyg_boxed_get(py_retval, %s);' %
self.props['typename'])
argtypes.matcher.register_reverse_ret("GBoxed", GBoxedReturn)
class GdkRegionPtrReturn(GBoxedReturn):
def write_error_return(self):
self.wrapper.write_code("return gdk_region_new();")
def write_conversion(self):
self.props['typecode'] = 'PYGDK_TYPE_REGION'
self.props['typename'] = 'GdkRegion'
super(GdkRegionPtrReturn, self).write_conversion()
argtypes.matcher.register_reverse_ret("GdkRegion*", GdkRegionPtrReturn)
class PangoFontDescriptionReturn(GBoxedReturn):
def write_error_return(self):
self.wrapper.write_code("return pango_font_description_new();")
def write_conversion(self):
self.props['typecode'] = 'PANGO_TYPE_FONT_DESCRIPTION'
self.props['typename'] = 'PangoFontDescription'
super(PangoFontDescriptionReturn, self).write_conversion()
argtypes.matcher.register_reverse_ret("PangoFontDescription*",
PangoFontDescriptionReturn)
class PangoFontMetricsReturn(GBoxedReturn):
def write_error_return(self):
self.wrapper.write_code("return pango_font_metrics_new();")
def write_conversion(self):
self.props['typecode'] = 'PANGO_TYPE_FONT_METRICS'
self.props['typename'] = 'PangoFontMetrics'
super(PangoFontMetricsReturn, self).write_conversion()
argtypes.matcher.register_reverse_ret("PangoFontMetrics*",
PangoFontMetricsReturn)
class PangoLanguageReturn(GBoxedReturn):
def write_error_return(self):
self.wrapper.write_code("return pango_language_from_string(\"\");")
def write_conversion(self):
self.props['typecode'] = 'PANGO_TYPE_LANGUAGE'
self.props['typename'] = 'PangoLanguage'
super(PangoLanguageReturn, self).write_conversion()
argtypes.matcher.register_reverse_ret("PangoLanguage*", PangoLanguageReturn)
class GdkRectanglePtrParam(Parameter):
def get_c_type(self):
return self.props.get('c_type').replace('const-', 'const ')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(
code=('py_%s = pyg_boxed_new(GDK_TYPE_RECTANGLE, %s, TRUE, TRUE);' %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name))
self.wrapper.add_pyargv_item("py_%s" % self.name)
argtypes.matcher.register_reverse("GdkRectangle*", GdkRectanglePtrParam)
argtypes.matcher.register_reverse('GtkAllocation*', GdkRectanglePtrParam)
class GErrorParam(Parameter):
def get_c_type(self):
return self.props.get('c_type').replace('**', ' **')
def convert_c2py(self):
self.wrapper.write_code(code=None,
failure_expression=("pyg_gerror_exception_check(%s)" % self.name),
code_sink=self.wrapper.check_exception_code)
argtypes.matcher.register_reverse('GError**', GErrorParam)
class PyGObjectMethodParam(Parameter):
def __init__(self, wrapper, name, method_name, **props):
Parameter.__init__(self, wrapper, name, **props)
self.method_name = method_name
def get_c_type(self):
return self.props.get('c_type', 'GObject *')
def convert_c2py(self):
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
self.wrapper.write_code(code=("py_%s = pygobject_new((GObject *) %s);" %
(self.name, self.name)),
cleanup=("Py_DECREF(py_%s);" % self.name),
failure_expression=("!py_%s" % self.name))
self.wrapper.set_call_target("py_%s" % self.name, self.method_name)
class CallbackInUserDataParam(Parameter):
def __init__(self, wrapper, name, free_it, **props):
Parameter.__init__(self, wrapper, name, **props)
self.free_it = free_it
def get_c_type(self):
return "gpointer"
def convert_c2py(self):
self.wrapper.add_declaration("PyObject **_user_data;")
cleanup = self.free_it and ("g_free(%s);" % self.name) or None
self.wrapper.write_code(code=("_real_user_data = (PyObject **) %s;"
% self.name),
cleanup=cleanup)
self.wrapper.add_declaration("PyObject *py_func;")
cleanup = self.free_it and "Py_DECREF(py_func);" or None
self.wrapper.write_code(code="py_func = _user_data[0];",
cleanup=cleanup)
self.wrapper.set_call_target("py_func")
self.wrapper.add_declaration("PyObject *py_user_data;")
cleanup = self.free_it and "Py_XDECREF(py_user_data);" or None
self.wrapper.write_code(code="py_user_data = _user_data[1];",
cleanup=cleanup)
self.wrapper.add_pyargv_item("py_user_data", optional=True)
def _test():
import sys
if 1:
wrapper = ReverseWrapper("this_is_the_c_function_name", is_static=True)
wrapper.set_return_type(StringReturn(wrapper))
wrapper.add_parameter(PyGObjectMethodParam(wrapper, "self", method_name="do_xxx"))
wrapper.add_parameter(StringParam(wrapper, "param2", optional=True))
wrapper.add_parameter(GObjectParam(wrapper, "param3"))
#wrapper.add_parameter(InoutIntParam(wrapper, "param4"))
wrapper.generate(FileCodeSink(sys.stderr))
if 0:
wrapper = ReverseWrapper("this_a_callback_wrapper")
wrapper.set_return_type(VoidReturn(wrapper))
wrapper.add_parameter(StringParam(wrapper, "param1", optional=False))
wrapper.add_parameter(GObjectParam(wrapper, "param2"))
wrapper.add_parameter(CallbackInUserDataParam(wrapper, "data", free_it=True))
wrapper.generate(FileCodeSink(sys.stderr))
if __name__ == '__main__':
_test()
|