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Text File | 1996-05-19 | 11.2 KB | 403 lines | [TEXT/Pyth] |
- # This script generates a Python interface for an Apple Macintosh Manager.
- # It uses the "bgen" package to generate C code.
- # The function specifications are generated by scanning the mamager's header file,
- # using the "scantools" package (customized for this particular manager).
-
- import string
-
- # Declarations that change for each manager
- MACHEADERFILE = 'WASTE.h' # The Apple header file
- MODNAME = 'waste' # The name of the module
- OBJECTNAME = 'waste' # The basic name of the objects used here
- KIND = 'Ptr' # Usually 'Ptr' or 'Handle'
-
- # The following is *usually* unchanged but may still require tuning
- MODPREFIX = MODNAME # The prefix for module-wide routines
- OBJECTTYPE = "WEReference" # The C type used to represent them
- OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
- INPUTFILE = 'wastegen.py' # The file generated by the scanner
- TYPETESTFILE = 'wastetypetest.py' # Another file generated by the scanner
- OUTPUTFILE = "wastemodule.c" # The file generated by this program
-
- from macsupport import *
-
- # Create the type objects
- WEReference = OpaqueByValueType("WEReference", "wasteObj")
- ExistingWEReference = OpaqueByValueType("WEReference", "ExistingwasteObj")
- WEObjectReference = OpaqueByValueType("WEObjectReference", "WEOObj")
- StScrpHandle = OpaqueByValueType("StScrpHandle", "ResObj")
- RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
- EventModifiers = Type("EventModifiers", "h")
- FlavorType = OSTypeType("FlavorType")
- WESelector = OSTypeType("WESelector")
-
- OptHandle = OpaqueByValueType("Handle", "OptResObj")
- OptSoupHandle = OpaqueByValueType("WESoupHandle", "OptResObj")
- OptStScrpHandle = OpaqueByValueType("StScrpHandle", "OptResObj")
-
- WEStyleMode = Type("WEStyleMode", "h")
- WEActionKind = Type("WEActionKind", "h")
- WEAlignment = Type("WEAlignment", "b")
- WESoupHandle = OpaqueByValueType("WESoupHandle", "ResObj")
- WERunInfo = OpaqueType("WERunInfo", "RunInfo")
-
- TextStyle = OpaqueType("TextStyle", "TextStyle")
- TextStyle_ptr = TextStyle
- LongPt = OpaqueType("LongPt", "LongPt")
- LongPt_ptr = LongPt
- LongRect = OpaqueType("LongRect", "LongRect")
- LongRect_ptr = LongRect
-
- includestuff = includestuff + """
- #include <%s>""" % MACHEADERFILE + """
- #include <WEObjectHandlers.h>
-
- /* Exported by Qdmodule.c: */
- extern PyObject *QdRGB_New(RGBColor *);
- extern int QdRGB_Convert(PyObject *, RGBColor *);
-
- /* Forward declaration */
- staticforward PyObject *WEOObj_New(WEObjectReference);
- staticforward PyObject *ExistingwasteObj_New(WEReference);
-
- /*
- ** Parse/generate TextStyle records
- */
- static
- PyObject *TextStyle_New(itself)
- TextStylePtr itself;
- {
-
- return Py_BuildValue("lllO&", (long)itself->tsFont, (long)itself->tsFace, (long)itself->tsSize, QdRGB_New,
- &itself->tsColor);
- }
-
- static
- TextStyle_Convert(v, p_itself)
- PyObject *v;
- TextStylePtr p_itself;
- {
- long font, face, size;
-
- if( !PyArg_ParseTuple(v, "lllO&", &font, &face, &size, QdRGB_Convert, &p_itself->tsColor) )
- return 0;
- p_itself->tsFont = (short)font;
- p_itself->tsFace = (Style)face;
- p_itself->tsSize = (short)size;
- return 1;
- }
-
- /*
- ** Parse/generate RunInfo records
- */
- static
- PyObject *RunInfo_New(itself)
- WERunInfo *itself;
- {
-
- return Py_BuildValue("llhhO&O&", itself->runStart, itself->runEnd, itself->runHeight,
- itself->runAscent, TextStyle_New, &itself->runStyle, WEOObj_New, itself->runObject);
- }
-
- /* Conversion of long points and rects */
- int
- LongRect_Convert(PyObject *v, LongRect *r)
- {
- return PyArg_Parse(v, "(llll)", &r->left, &r->top, &r->right, &r->bottom);
- }
-
- PyObject *
- LongRect_New(LongRect *r)
- {
- return Py_BuildValue("(llll)", r->left, r->top, r->right, r->bottom);
- }
-
-
- LongPt_Convert(PyObject *v, LongPt *p)
- {
- return PyArg_Parse(v, "(ll)", &p->h, &p->v);
- }
-
- PyObject *
- LongPt_New(LongPt *p)
- {
- return Py_BuildValue("(ll)", p->h, p->v);
- }
-
- /* Stuff for the callbacks: */
- static PyObject *callbackdict;
- WENewObjectUPP upp_new_handler;
- WEDisposeObjectUPP upp_dispose_handler;
- WEDrawObjectUPP upp_draw_handler;
- WEClickObjectUPP upp_click_handler;
-
- static OSErr
- any_handler(WESelector what, WEObjectReference who, PyObject *args, PyObject **rv)
- {
- FlavorType tp;
- PyObject *key, *func;
-
- if ( args == NULL ) return errAECorruptData;
-
- tp = WEGetObjectType(who);
-
- if( (key=Py_BuildValue("O&O&", PyMac_BuildOSType, tp, PyMac_BuildOSType, what)) == NULL)
- return errAECorruptData;
- if( (func = PyDict_GetItem(callbackdict, key)) == NULL ) {
- Py_DECREF(key);
- return errAEHandlerNotFound;
- }
- Py_INCREF(func);
- *rv = PyEval_CallObject(func, args);
- Py_DECREF(func);
- Py_DECREF(key);
- if ( *rv == NULL ) {
- fprintf(stderr, "--Exception in callback: ");
- PyErr_Print();
- return errAEReplyNotArrived;
- }
- return 0;
- }
-
- static pascal OSErr
- my_new_handler(Point *objectSize, WEObjectReference objref)
- {
- PyObject *args=NULL, *rv=NULL;
- OSErr err;
-
- args=Py_BuildValue("(O&)", WEOObj_New, objref);
- err = any_handler(weNewHandler, objref, args, &rv);
- if (!err) {
- if (!PyMac_GetPoint(rv, objectSize) )
- err = errAECoercionFail;
- }
- if ( args ) Py_DECREF(args);
- if ( rv ) Py_DECREF(rv);
- return err;
- }
-
- static pascal OSErr
- my_dispose_handler(WEObjectReference objref)
- {
- PyObject *args=NULL, *rv=NULL;
- OSErr err;
-
- args=Py_BuildValue("(O&)", WEOObj_New, objref);
- err = any_handler(weDisposeHandler, objref, args, &rv);
- if ( args ) Py_DECREF(args);
- if ( rv ) Py_DECREF(rv);
- return err;
- }
-
- static pascal OSErr
- my_draw_handler(Rect *destRect, WEObjectReference objref)
- {
- PyObject *args=NULL, *rv=NULL;
- OSErr err;
-
- args=Py_BuildValue("O&O&", PyMac_BuildRect, destRect, WEOObj_New, objref);
- err = any_handler(weDrawHandler, objref, args, &rv);
- if ( args ) Py_DECREF(args);
- if ( rv ) Py_DECREF(rv);
- return err;
- }
-
- static pascal Boolean
- my_click_handler(Point hitPt, EventModifiers modifiers,
- unsigned long clickTime, WEObjectReference objref)
- {
- PyObject *args=NULL, *rv=NULL;
- int retvalue;
- OSErr err;
-
- args=Py_BuildValue("O&llO&", PyMac_BuildPoint, hitPt,
- (long)modifiers, (long)clickTime, WEOObj_New, objref);
- err = any_handler(weClickHandler, objref, args, &rv);
- if (!err)
- retvalue = PyInt_AsLong(rv);
- else
- retvalue = 0;
- if ( args ) Py_DECREF(args);
- if ( rv ) Py_DECREF(rv);
- return retvalue;
- }
-
-
- """
- finalstuff = finalstuff + """
- /* Return the object corresponding to the window, or NULL */
-
- PyObject *
- ExistingwasteObj_New(w)
- WEReference w;
- {
- PyObject *it = NULL;
-
- if (w == NULL)
- it = NULL;
- else
- WEGetInfo(weRefCon, (void *)&it, w);
- if (it == NULL || ((wasteObject *)it)->ob_itself != w)
- it = Py_None;
- Py_INCREF(it);
- return it;
- }
- """
-
- class WEMethodGenerator(OSErrMethodGenerator):
- """Similar to MethodGenerator, but has self as last argument"""
-
- def parseArgumentList(self, args):
- args, a0 = args[:-1], args[-1]
- t0, n0, m0 = a0
- if m0 != InMode:
- raise ValueError, "method's 'self' must be 'InMode'"
- self.itself = Variable(t0, "_self->ob_itself", SelfMode)
- FunctionGenerator.parseArgumentList(self, args)
- self.argumentList.append(self.itself)
-
-
-
- class WEObjectDefinition(GlobalObjectDefinition):
- def outputCheckNewArg(self):
- Output("""if (itself == NULL) {
- PyErr_SetString(waste_Error,"Cannot create null WE");
- return NULL;
- }""")
- def outputInitStructMembers(self):
- GlobalObjectDefinition.outputInitStructMembers(self)
- Output("WESetInfo(weRefCon, (void *)&it, itself);")
- def outputFreeIt(self, itselfname):
- Output("WEDispose(%s);", itselfname)
-
- class WEOObjectDefinition(GlobalObjectDefinition):
- def outputCheckNewArg(self):
- Output("""if (itself == NULL) {
- Py_INCREF(Py_None);
- return Py_None;
- }""")
-
- variablestuff = """
- callbackdict = PyDict_New();
- if (callbackdict == NULL || PyDict_SetItemString(d, "callbacks", callbackdict) != 0)
- Py_FatalError("can't initialize Waste.callbackdict");
- upp_new_handler = NewWENewObjectProc(my_new_handler);
- upp_dispose_handler = NewWEDisposeObjectProc(my_dispose_handler);
- upp_draw_handler = NewWEDrawObjectProc(my_draw_handler);
- upp_click_handler = NewWEClickObjectProc(my_click_handler);
- """
-
-
- # From here on it's basically all boiler plate...
-
- # Test types used for existence
- ## execfile(TYPETESTFILE)
-
- # Create the generator groups and link them
- module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff, variablestuff)
- object = WEObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
- object2 = WEOObjectDefinition("WEO", "WEOObj", "WEObjectReference")
- module.addobject(object2)
- module.addobject(object)
-
- # Create the generator classes used to populate the lists
- Function = OSErrFunctionGenerator
- Method = WEMethodGenerator
- Method2 = OSErrMethodGenerator
-
- # Create and populate the lists
- functions = []
- methods = []
- methods2 = []
- execfile(INPUTFILE)
-
- # A function written by hand:
- stdhandlers_body = """
- OSErr err;
- // install the sample object handlers for pictures and sounds
- #define kTypePicture 'PICT'
- #define kTypeSound 'snd '
-
- if ( !PyArg_ParseTuple(_args, "") ) return NULL;
-
- if ((err = WEInstallObjectHandler(kTypePicture, weNewHandler,
- (UniversalProcPtr) NewWENewObjectProc(HandleNewPicture), NULL)) != noErr)
- goto cleanup;
-
- if ((err = WEInstallObjectHandler(kTypePicture, weDisposeHandler,
- (UniversalProcPtr) NewWEDisposeObjectProc(HandleDisposePicture), NULL)) != noErr)
- goto cleanup;
-
- if ((err = WEInstallObjectHandler(kTypePicture, weDrawHandler,
- (UniversalProcPtr) NewWEDrawObjectProc(HandleDrawPicture), NULL)) != noErr)
- goto cleanup;
-
- if ((err = WEInstallObjectHandler(kTypeSound, weNewHandler,
- (UniversalProcPtr) NewWENewObjectProc(HandleNewSound), NULL)) != noErr)
- goto cleanup;
-
- if ((err = WEInstallObjectHandler(kTypeSound, weDrawHandler,
- (UniversalProcPtr) NewWEDrawObjectProc(HandleDrawSound), NULL)) != noErr)
- goto cleanup;
-
- if ((err = WEInstallObjectHandler(kTypeSound, weClickHandler,
- (UniversalProcPtr) NewWEClickObjectProc(HandleClickSound), NULL)) != noErr)
- goto cleanup;
- Py_INCREF(Py_None);
- return Py_None;
-
- cleanup:
- return PyMac_Error(err);
- """
-
- inshandler_body = """
- OSErr err;
- FlavorType objectType;
- WESelector selector;
- PyObject *py_handler;
- UniversalProcPtr handler;
- WEReference we = NULL;
- PyObject *key;
-
-
- if ( !PyArg_ParseTuple(_args, "O&O&O|O&",
- PyMac_GetOSType, &objectType,
- PyMac_GetOSType, &selector,
- &py_handler,
- ExistingwasteObj_New, &we) ) return NULL;
-
- if ( selector == weNewHandler ) handler = (UniversalProcPtr)upp_new_handler;
- else if ( selector == weDisposeHandler ) handler = (UniversalProcPtr)upp_dispose_handler;
- else if ( selector == weDrawHandler ) handler = (UniversalProcPtr)upp_draw_handler;
- else if ( selector == weClickHandler ) handler = (UniversalProcPtr)upp_click_handler;
- else return PyMac_Error(weUndefinedSelectorErr);
-
- if ((key = Py_BuildValue("O&O&",
- PyMac_BuildOSType, objectType,
- PyMac_BuildOSType, selector)) == NULL )
- return NULL;
-
- PyDict_SetItem(callbackdict, key, py_handler);
-
- err = WEInstallObjectHandler(objectType, selector, handler, we);
- if ( err ) return PyMac_Error(err);
- Py_INCREF(Py_None);
- return Py_None;
- """
-
- stdhand = ManualGenerator("STDObjectHandlers", stdhandlers_body)
- inshand = ManualGenerator("WEInstallObjectHandler", inshandler_body)
-
- # add the populated lists to the generator groups
- # (in a different wordl the scan program would generate this)
- for f in functions: module.add(f)
- module.add(stdhand)
- module.add(inshand)
- for f in methods: object.add(f)
- for f in methods2: object2.add(f)
-
- # generate output (open the output file as late as possible)
- SetOutputFileName(OUTPUTFILE)
- module.generate()
-
-