Glue code to connect obj_New and obj_Convert routines (the PyArg_Parse and Py_BuildTuple helpers) from one dynamically imported module to another.

1 files changed, 108 insertions, 0 deletions

diff --git a/Mac/Python/mactoolboxglue.c b/Mac/Python/mactoolboxglue.c
new file mode 100644
index 0000000..fa910e3
--- /dev/null
+++ b/Mac/Python/mactoolboxglue.c
@@ -0,0 +1,108 @@
+/*
+** mactoolboxglue.c - Glue together the toolbox objects.
+**
+** Because toolbox modules interdepend on each other, they use each others
+** object types, on MacOSX/MachO this leads to the situation that they
+** cannot be dynamically loaded (or they would all have to be lumped into
+** a single .so, but this would be bad for extensibility).
+**
+** This file defines wrappers for all the _New and _Convert functions,
+** which are the Py_BuildValue and PyArg_ParseTuple helpers. The wrappers
+** check an indirection function pointer, and if it isn't filled in yet
+** they import the appropriate module, whose init routine should fill in
+** the pointer.
+*/
+
+#ifdef USE_TOOLBOX_OBJECT_GLUE
+
+#include "python.h"
+#include "pymactoolbox.h"
+
+#define GLUE_NEW(object, routinename, module) \
+PyObject *(*PyMacGluePtr_##routinename)(object); \
+\
+PyObject *routinename(object cobj) { \
+    if (!PyMacGluePtr_##routinename) { \
+       if (!PyImport_ImportModule(module)) return NULL; \
+       if (!PyMacGluePtr_##routinename) { \
+           PyErr_SetString(PyExc_ImportError, "Module did not provide routine: " module ": " #routinename); \
+           return NULL; \
+       } \
+    } \
+    return (*PyMacGluePtr_##routinename)(cobj); \
+}
+
+#define GLUE_CONVERT(object, routinename, module) \
+int (*PyMacGluePtr_##routinename)(PyObject *, object *); \
+\
+int routinename(PyObject *pyobj, object *cobj) { \
+    if (!PyMacGluePtr_##routinename) { \
+       if (!PyImport_ImportModule(module)) return NULL; \
+       if (!PyMacGluePtr_##routinename) { \
+           PyErr_SetString(PyExc_ImportError, "Module did not provide routine: " module ": " #routinename); \
+           return NULL; \
+       } \
+    } \
+    return (*PyMacGluePtr_##routinename)(pyobj, cobj); \
+}
+
+GLUE_NEW(AppleEvent *, AEDesc_New, "AE") /* XXXX Why by address? */
+GLUE_CONVERT(AppleEvent, AEDesc_Convert, "AE")
+
+GLUE_NEW(Component, CmpObj_New, "Cm")
+GLUE_CONVERT(Component, CmpObj_Convert, "Cm")
+GLUE_NEW(ComponentInstance, CmpInstObj_New, "Cm")
+GLUE_CONVERT(ComponentInstance, CmpInstObj_Convert, "Cm")
+
+GLUE_NEW(ControlHandle, CtlObj_New, "Ctl")
+GLUE_CONVERT(ControlHandle, CtlObj_Convert, "Ctl")
+
+GLUE_NEW(DialogPtr, DlgObj_New, "Dlg")
+GLUE_CONVERT(DialogPtr, DlgObj_Convert, "Dlg")
+GLUE_NEW(DialogPtr, DlgObj_WhichDialog, "Dlg")
+
+GLUE_NEW(DragReference, DragObj_New, "Drag")
+GLUE_CONVERT(DragReference, DragObj_Convert, "Drag")
+
+GLUE_NEW(ListHandle, ListObj_New, "List")
+GLUE_CONVERT(ListHandle, ListObj_Convert, "List")
+
+GLUE_NEW(MenuHandle, MenuObj_New, "Menu")
+GLUE_CONVERT(MenuHandle, MenuObj_Convert, "Menu")
+
+GLUE_NEW(GrafPtr, GrafObj_New, "Qd")
+GLUE_CONVERT(GrafPtr, GrafObj_Convert, "Qd")
+GLUE_NEW(BitMapPtr, BMObj_New, "Qd")
+GLUE_CONVERT(BitMapPtr, BMObj_Convert, "Qd")
+GLUE_NEW(RGBColor *, QdRGB_New, "Qd") /* XXXX Why? */
+GLUE_CONVERT(RGBColor, QdRGB_Convert, "Qd")
+
+GLUE_NEW(GWorldPtr, GWorldObj_New, "Qdoffs")
+GLUE_CONVERT(GWorldPtr, GWorldObj_Convert, "Qdoffs")
+
+GLUE_NEW(Track, TrackObj_New, "Qt")
+GLUE_CONVERT(Track, TrackObj_Convert, "Qt")
+GLUE_NEW(Movie, MovieObj_New, "Qt")
+GLUE_CONVERT(Movie, MovieObj_Convert, "Qt")
+GLUE_NEW(MovieController, MovieCtlObj_New, "Qt")
+GLUE_CONVERT(MovieController, MovieCtlObj_Convert, "Qt")
+GLUE_NEW(TimeBase, TimeBaseObj_New, "Qt")
+GLUE_CONVERT(TimeBase, TimeBaseObj_Convert, "Qt")
+GLUE_NEW(UserData, UserDataObj_New, "Qt")
+GLUE_CONVERT(UserData, UserDataObj_Convert, "Qt")
+GLUE_NEW(Media, MediaObj_New, "Qt")
+GLUE_CONVERT(Media, MediaObj_Convert, "Qt")
+
+GLUE_NEW(Handle, ResObj_New, "Res")
+GLUE_CONVERT(Handle, ResObj_Convert, "Res")
+GLUE_NEW(Handle, OptResObj_New, "Res")
+GLUE_CONVERT(Handle, OptResObj_Convert, "Res")
+
+GLUE_NEW(TEHandle, TEObj_New, "TE")
+GLUE_CONVERT(TEHandle, TEObj_Convert, "TE")
+
+GLUE_NEW(WindowPtr, WinObj_New, "Win")
+GLUE_CONVERT(WindowPtr, WinObj_Convert, "Win")
+GLUE_NEW(WindowPtr, WinObj_WhichWindow, "Win")
+
+#endif /* USE_TOOLBOX_OBJECT_GLUE */
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