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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
- FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Objective-C interface for NeXTStep */
- /* Tested with NeXTStep 3.3 on Intel and Sparc architectures */
-
- /* Original author: Jon M. Kutemeier */
- /* Revamped and maintained by: Guido van Rossum */
-
- /* XXX To do:
- - bug??? x.send('name', []) gives weird error
- - rename functions from objc_* to ObjC_*
- - change send(sel, [a, b, c]) to send(self, a, b, c)
- - call back to Python from Objective-C
- */
-
- /* Python header file */
- #include "Python.h"
-
- /* NeXT headers */
- #include <sys/param.h>
- #include <mach-o/rld.h>
- #include <objc/objc.h>
- #include <objc/objc-runtime.h>
- #import <remote/NXProxy.h>
-
- /* Distinguish between ObjC classes and instances */
- typedef enum {
- OBJC_CLASS,
- OBJC_INSTANCE,
- } ObjC_Typecode;
-
- /* Exception raised for ObjC specific errors */
- static PyObject *ObjC_Error;
-
- /* Python wrapper about ObjC id (instance or class) */
- typedef struct {
- PyObject_HEAD
- id obj;
- ObjC_Typecode type;
- int owned;
- } ObjCObject;
-
- /* Corresponding Python type object */
- staticforward PyTypeObject ObjC_Type;
-
- /* Corresponding Python type check macro */
- #define ObjC_Check(o) ((o)->ob_type == &ObjC_Type)
-
- /* Create a new ObjCObject */
- static ObjCObject *
- newObjCObject(obj, type, owned)
- id obj;
- ObjC_Typecode type;
- int owned;
- {
- ObjCObject *self;
-
- self = PyObject_NEW(ObjCObject, &ObjC_Type);
- if (self == NULL)
- return NULL;
-
- self->obj = obj;
- self->type = type;
- self->owned = owned;
-
- return self;
- }
-
- static void
- objc_sendfree(self)
- ObjCObject *self;
- {
- if (self->obj)
- self->obj = (id)objc_msgSend(self->obj, SELUID("free"));
- }
-
- /* Deallocate an ObjCObject */
- static void
- objc_dealloc(self)
- ObjCObject *self;
- {
- if (self->owned)
- objc_sendfree(self);
- PyMem_DEL(self);
- }
-
- /* Return a string representation of an ObjCObject */
- static PyObject *
- objc_repr(self)
- ObjCObject *self;
- {
- char buffer[512];
- char *p = buffer;
- if (self->obj == nil)
- p = "<Objective-C nil>";
- else {
- char *t;
- switch (self->type) {
- case OBJC_CLASS: t = "class"; break;
- case OBJC_INSTANCE: t = "instance"; break;
- default: t = "???"; break;
- }
- sprintf(buffer, "<Objective-C %s %s at %lx>",
- NAMEOF(self->obj), t, (long)(self->obj));
- }
- return PyString_FromString(p);
- }
-
- /*** ObjCObject methods ***/
-
- /* Call an object's free method */
- static PyObject *
- objc_free(self, args)
- ObjCObject *self;
- PyObject *args;
- {
- if (!PyArg_ParseTuple(args, ""))
- return NULL;
- objc_sendfree(self);
- }
-
- /* Send a message to an ObjCObject.
- The Python call looks like e.g. obj.send('moveTo::', [arg1, arg2])
- which translates into Objective-C as [obj moveTo: arg1 : arg2] */
- static PyObject *
- objc_send(self, args)
- ObjCObject *self;
- PyObject *args;
- {
- char *methodname;
- char *margBuff = NULL;
- PyObject *retobject = NULL;
- PyObject *arglist;
- id receiver, obj;
- char *type;
- SEL sel;
- Method meth;
- unsigned int margCount, margSize;
- int offset, i;
-
- if (!PyArg_ParseTuple(args, "sO!", &methodname, &PyList_Type, &arglist))
- return NULL;
-
- /* Get the method descriptor from the object */
-
- receiver = self->obj;
- sel = SELUID(methodname);
-
- switch(self->type) {
- case OBJC_CLASS:
- meth = class_getClassMethod(receiver->isa, sel);
- break;
- case OBJC_INSTANCE:
- meth = class_getInstanceMethod(receiver->isa, sel);
- break;
- default:
- PyErr_SetString(ObjC_Error,
- "receiver's type is neither instance not class!?!?");
- return NULL;
- }
-
- if (!meth) {
- PyErr_SetString(ObjC_Error, "receiver has no method by that name");
- return NULL;
- }
-
- /* Fill in the argument list, type-checking the arguments */
-
- margCount = method_getNumberOfArguments(meth);
-
- if (PyList_Size(arglist) + 2 != margCount) {
- PyErr_SetString(ObjC_Error,
- "wrong number of arguments for this method");
- return NULL;
- }
-
- margSize = method_getSizeOfArguments(meth);
- margBuff = PyMem_NEW(char, margSize+1);
- if (margBuff == NULL)
- return PyErr_NoMemory();
-
- method_getArgumentInfo(meth, 0, &type, &offset);
- marg_setValue(margBuff, offset, id, receiver);
-
- method_getArgumentInfo(meth, 1, &type, &offset);
- marg_setValue(margBuff, offset, SEL, sel);
-
- for (i = 2; i < margCount; i++) {
- PyObject *argument;
- method_getArgumentInfo(meth, i, &type, &offset);
-
- argument = PyList_GetItem(arglist, i-2);
-
- /* scan past protocol-type modifiers */
- while (strchr("rnNoOV", *type) != 0)
- type++;
-
- /* common type checks */
- switch(*type) {
-
- /* XXX The errors here should point out which argument */
-
- case 'c':
- case '*':
- case 'C':
- if (!PyString_Check(argument)) {
- PyErr_SetString(ObjC_Error, "string argument expected");
- goto error;
- }
- break;
-
- case 'i':
- case 's':
- case 'I':
- case 'S':
- case 'l':
- case 'L':
- case '^':
- if (!PyInt_Check(argument)) {
- PyErr_SetString(ObjC_Error, "integer argument expected");
- goto error;
- }
- break;
-
- case 'f':
- case 'd':
- if (!PyFloat_Check(argument)) {
- PyErr_SetString(ObjC_Error, "float argument expected");
- goto error;
- }
- break;
-
- }
-
- /* convert and store the argument */
- switch (*type) {
-
- case 'c': /* char */
- marg_setValue(margBuff, offset, char,
- PyString_AsString(argument)[0]);
- break;
-
- case 'C': /* unsigned char */
- marg_setValue(margBuff, offset, unsigned char,
- PyString_AsString(argument)[0]);
- break;
-
- case '*': /* string */
- marg_setValue(margBuff, offset, char *,
- PyString_AsString(argument));
- break;
-
- case 'i': /* int */
- marg_setValue(margBuff, offset, int,
- PyInt_AsLong(argument));
- break;
-
- case 'I': /* unsigned int */
- marg_setValue(margBuff, offset, unsigned int,
- PyInt_AsLong(argument));
- break;
-
- case 's': /* short */
- marg_setValue(margBuff, offset, short,
- PyInt_AsLong(argument));
- break;
-
- case 'S': /* unsigned short */
- marg_setValue(margBuff, offset, unsigned short,
- PyInt_AsLong(argument));
- break;
-
- case 'l': /* long */
- marg_setValue(margBuff, offset, long,
- PyInt_AsLong(argument));
- break;
-
- case 'L': /* unsigned long */
- marg_setValue(margBuff, offset, unsigned long,
- PyInt_AsLong(argument));
- break;
-
- case 'f': /* float */
- marg_setValue(margBuff, offset, float,
- (float)PyFloat_AsDouble(argument));
- break;
-
- case 'd': /* double */
- marg_setValue(margBuff, offset, double,
- PyFloat_AsDouble(argument));
- break;
-
- case '@': /* id (or None) */
- if (ObjC_Check(argument))
- marg_setValue(margBuff, offset, id,
- ((ObjCObject *)(argument))->obj);
- else if (argument == Py_None)
- marg_setValue(margBuff, offset, id, nil);
- else {
- PyErr_SetString(ObjC_Error, "id or None argument expected");
- goto error;
- }
- break;
-
- case '^': /* void * (use int) */
- marg_setValue(margBuff, offset, void *,
- (void *)PyInt_AsLong(argument));
- break;
-
- case ':': /* SEL (use string or int) */
- if (PyInt_Check(argument))
- marg_setValue(margBuff, offset, SEL,
- (SEL)PyInt_AsLong(argument));
- else if (PyString_Check(argument))
- marg_setValue(margBuff, offset, SEL,
- SELUID(PyString_AsString(argument)));
- else {
- PyErr_SetString(ObjC_Error,
- "selector string or int argument expected");
- goto error;
- }
- break;
-
- case '#': /* Class (may also use int) */
- if (ObjC_Check(argument) &&
- ((ObjCObject *)argument)->type == OBJC_INSTANCE)
- marg_setValue(margBuff, offset, Class *,
- (Class *)((ObjCObject *)argument)->obj);
- else if (PyInt_Check(argument))
- marg_setValue(margBuff, offset, Class *,
- (Class *)PyInt_AsLong(argument));
- else {
- PyErr_SetString(ObjC_Error,
- "ObjC class object required");
- goto error;
- }
- break;
-
- default:
- PyErr_SetString(ObjC_Error, "unknown argument type");
- goto error;
-
- }
- }
-
- /* Call the method and set the return value */
-
- type = meth->method_types;
-
- while (strchr("rnNoOV", *type))
- type++;
-
- switch(*type) {
-
- /* Cast objc_msgSendv to a function returning the right thing */
- #define MS_CAST(type) ((type (*)())objc_msgSendv)
-
- case 'c':
- case '*':
- case 'C':
- retobject = (PyObject *)PyString_FromString(
- MS_CAST(char *)(receiver, sel, margSize, margBuff));
- break;
-
- case 'i':
- case 's':
- case 'I':
- case 'S':
- retobject = (PyObject *)PyInt_FromLong(
- MS_CAST(int)(receiver, sel, margSize, margBuff));
- break;
-
- case 'l':
- case 'L':
- case '^':
- retobject = (PyObject *)PyInt_FromLong(
- MS_CAST(long)(receiver, sel, margSize, margBuff));
- break;
-
- case 'f':
- retobject = (PyObject *)PyFloat_FromDouble(
- MS_CAST(float)(receiver, sel, margSize, margBuff));
- break;
-
- case 'd':
- retobject = (PyObject *)PyFloat_FromDouble(
- MS_CAST(double)(receiver, sel, margSize, margBuff));
- break;
-
- case '@':
- obj = MS_CAST(id)(receiver, sel, margSize, margBuff);
- if (obj == nil) {
- retobject = Py_None;
- Py_INCREF(retobject);
- }
- else if (obj != receiver)
- retobject = (PyObject *)newObjCObject(obj, OBJC_INSTANCE, 0);
- else {
- retobject = (PyObject *)self;
- Py_INCREF(retobject);
- }
- break;
-
- case ':':
- retobject = (PyObject *)PyInt_FromLong(
- (long)MS_CAST(SEL)(receiver, sel, margSize, margBuff));
- break;
-
- case '#':
- retobject = (PyObject *)PyInt_FromLong(
- (long)MS_CAST(Class *)(receiver, sel, margSize, margBuff));
- break;
-
- #undef MS_CAST
-
- }
-
- error:
- PyMem_XDEL(margBuff);
- return retobject;
- }
-
- /* List of methods for ObjCObject */
- static PyMethodDef objc_methods[] = {
- {"send", (PyCFunction)objc_send, 1},
- {"free", (PyCFunction)objc_free, 1},
- {NULL, NULL} /* sentinel */
- };
-
- /* Get an attribute of an ObjCObject */
- static PyObject *
- objc_getattr(self, name)
- ObjCObject *self;
- char *name;
- {
- PyObject *method;
-
- /* Try a function method */
- method = Py_FindMethod(objc_methods, (PyObject *)self, name);
- if (method != NULL)
- return method;
- PyErr_Clear();
-
- /* Try an instance variable */
- if (strcmp(name, "obj") == 0)
- return PyInt_FromLong((long)self->obj);
- if (strcmp(name, "type") == 0)
- return PyInt_FromLong((long)self->type);
- if (strcmp(name, "owned") == 0)
- return PyInt_FromLong((long)self->owned);
- if (strcmp(name, "name") == 0)
- return PyString_FromString(NAMEOF(self->obj));
- if (strcmp(name, "__members__") == 0)
- return Py_BuildValue("[sss]", "name", "obj", "owned", "type");
-
- PyErr_SetString(PyExc_AttributeError, name);
- return NULL;
- }
-
- /* The type object */
- static PyTypeObject ObjC_Type = {
- PyObject_HEAD_INIT(&PyType_Type)
- 0, /*ob_size*/
- "objc", /*tp_name*/
- sizeof(ObjCObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- /* methods */
- (destructor)objc_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)objc_getattr, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- (reprfunc)objc_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, 0, 0, 0, /*xxx1-4*/
- "Objective-C id wrapper", /*tp_doc*/
- };
-
-
-
- /*** Top-level functions ***/
-
- /* Max #files passed to loadobjectfile() */
- #define MAXRLD 128
-
- /* Load a list of object files */
- static PyObject *
- objc_loadobjectfiles(self, args)
- PyObject *self; /* Not used */
- PyObject *args;
- {
- NXStream *errorStream;
- struct mach_header *new_header;
- const char *filenames[MAXRLD+1];
- long ret;
- char *streamBuf;
- PyObject *filelist, *file;
- int listsize, len, maxLen, i;
-
- if (!PyArg_ParseTuple(args, "O!", &PyList_Type, &filelist))
- return NULL;
-
- listsize = PyList_Size(filelist);
-
- if (listsize > MAXRLD) {
- PyErr_SetString(ObjC_Error, "more than 128 files in list");
- return NULL;
- }
-
- errorStream = NXOpenMemory(NULL, 0, NX_WRITEONLY);
-
- for (i = 0; i < listsize; i++) {
- file = PyList_GetItem(filelist, i);
-
- if (!PyString_Check(file))
- {
- PyErr_SetString(ObjC_Error,
- "all list items must be strings");
- return NULL;
- }
-
- filenames[i] = PyString_AsString(file);
- }
-
- filenames[listsize] = NULL;
-
- ret = objc_loadModules(filenames, errorStream, NULL, &new_header, NULL);
-
- /* extract the error messages for the exception */
-
- if(ret) {
- NXPutc(errorStream, (char)0);
-
- NXGetMemoryBuffer(errorStream, &streamBuf, &len, &maxLen);
- PyErr_SetString(ObjC_Error, streamBuf);
- }
-
- NXCloseMemory(errorStream, NX_FREEBUFFER);
-
- if(ret)
- return NULL;
-
- Py_XINCREF(Py_None);
- return Py_None;
- }
-
- static PyObject *
- objc_lookupclass(self, args)
- PyObject *self; /* Not used */
- PyObject *args;
- {
- char *classname;
- id class;
-
- if (!PyArg_ParseTuple(args, "s", &classname))
- return NULL;
-
- if (!(class = objc_lookUpClass(classname)))
- {
- PyErr_SetString(ObjC_Error, "unknown ObjC class");
- return NULL;
- }
-
- return (PyObject *)newObjCObject(class, OBJC_CLASS, 0);
- }
-
- /* List all classes */
- static PyObject *
- objc_listclasses(self, args)
- ObjCObject *self;
- PyObject *args;
- {
- NXHashTable *class_hash = objc_getClasses();
- NXHashState state = NXInitHashState(class_hash);
- Class classid;
- PyObject *list;
-
- if (!PyArg_ParseTuple(args, ""))
- return NULL;
-
- list = PyList_New(0);
- if (list == NULL)
- return NULL;
-
- while (NXNextHashState(class_hash, &state, (void**)&classid)) {
- ObjCObject *item = newObjCObject(classid, OBJC_CLASS, 0);
- if (item == NULL || PyList_Append(list, (PyObject *)item) < 0) {
- Py_XDECREF(item);
- Py_DECREF(list);
- return NULL;
- }
- Py_INCREF(item);
- }
-
- return list;
- }
-
- /* List of top-level functions */
- static PyMethodDef objc_class_methods[] = {
- {"loadobjectfiles", objc_loadobjectfiles, 1},
- {"lookupclass", objc_lookupclass, 1},
- {"listclasses", objc_listclasses, 1},
- {NULL, NULL} /* sentinel */
- };
-
- /* Initialize for the module */
- void
- initobjc()
- {
- PyObject *m, *d;
-
- m = Py_InitModule("objc", objc_class_methods);
- d = PyModule_GetDict(m);
-
- ObjC_Error = PyString_FromString("objc.error");
- PyDict_SetItemString(d, "error", ObjC_Error);
-
- if (PyErr_Occurred())
- Py_FatalError("can't initialize module objc");
-
- #ifdef WITH_THREAD
- objc_setMultithreaded(1);
- #endif
- }
-