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# This script will generate the Resources interface for Python.
# It uses the "bgen" package to generate C code.
# It execs the file resgen.py which contain the function definitions
# (resgen.py was generated by resscan.py, scanning the <Resources.h> header file).
from macsupport import *
class ResMixIn:
def checkit(self):
OutLbrace()
Output("OSErr _err = ResError();")
Output("if (_err != noErr) return PyMac_Error(_err);")
OutRbrace()
FunctionGenerator.checkit(self) # XXX
class ResFunction(ResMixIn, FunctionGenerator): pass
class ResMethod(ResMixIn, MethodGenerator): pass
# includestuff etc. are imported from macsupport
includestuff = includestuff + """
#include <Resources.h>
#include <string.h>
#define resNotFound -192 /* Can't include <Errors.h> because of Python's "errors.h" */
/* Function to dispose a resource, with a "normal" calling sequence */
static void
PyMac_AutoDisposeHandle(Handle h)
{
DisposeHandle(h);
}
"""
finalstuff = finalstuff + """
/* Alternative version of ResObj_New, which returns None for null argument */
PyObject *OptResObj_New(itself)
Handle itself;
{
if (itself == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return ResObj_New(itself);
}
OptResObj_Convert(v, p_itself)
PyObject *v;
Handle *p_itself;
{
PyObject *tmp;
if ( v == Py_None ) {
*p_itself = NULL;
return 1;
}
if (ResObj_Check(v))
{
*p_itself = ((ResourceObject *)v)->ob_itself;
return 1;
}
/* If it isn't a resource yet see whether it is convertible */
if ( (tmp=PyObject_CallMethod(v, "as_Resource", "")) ) {
*p_itself = ((ResourceObject *)tmp)->ob_itself;
Py_DECREF(tmp);
return 1;
}
PyErr_Clear();
PyErr_SetString(PyExc_TypeError, "Resource required");
return 0;
}
"""
initstuff = initstuff + """
"""
module = MacModule('Res', 'Res', includestuff, finalstuff, initstuff)
getattrHookCode = """
if (strcmp(name, "size") == 0)
return PyInt_FromLong(GetHandleSize(self->ob_itself));
if (strcmp(name, "data") == 0) {
PyObject *res;
char state;
state = HGetState(self->ob_itself);
HLock(self->ob_itself);
res = PyString_FromStringAndSize(
*self->ob_itself,
GetHandleSize(self->ob_itself));
HUnlock(self->ob_itself);
HSetState(self->ob_itself, state);
return res;
}
if (strcmp(name, "__members__") == 0)
return Py_BuildValue("[ss]", "data", "size");
"""
setattrCode = """
static int
ResObj_setattr(self, name, value)
ResourceObject *self;
char *name;
PyObject *value;
{
char *data;
long size;
if (strcmp(name, "data") != 0 || value == NULL )
return -1;
if ( !PyString_Check(value) )
return -1;
size = PyString_Size(value);
data = PyString_AsString(value);
/* XXXX Do I need the GetState/SetState calls? */
SetHandleSize(self->ob_itself, size);
if ( MemError())
return -1;
HLock(self->ob_itself);
memcpy((char *)*self->ob_itself, data, size);
HUnlock(self->ob_itself);
/* XXXX Should I do the Changed call immedeately? */
return 0;
}
"""
class ResDefinition(GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("if (itself == NULL) return PyMac_Error(resNotFound);")
def outputCheckConvertArg(self):
# if it isn't a resource we may be able to coerce it
Output("if (!%s_Check(v))", self.prefix)
OutLbrace()
Output("PyObject *tmp;")
Output('if ( (tmp=PyObject_CallMethod(v, "as_Resource", "")) )')
OutLbrace()
Output("*p_itself = ((ResourceObject *)tmp)->ob_itself;")
Output("Py_DECREF(tmp);")
Output("return 1;")
OutRbrace()
Output("PyErr_Clear();")
OutRbrace()
def outputGetattrHook(self):
Output(getattrHookCode)
def outputSetattr(self):
Output(setattrCode)
def outputStructMembers(self):
GlobalObjectDefinition.outputStructMembers(self)
Output("void (*ob_freeit)(%s ptr);", self.itselftype)
def outputInitStructMembers(self):
GlobalObjectDefinition.outputInitStructMembers(self)
Output("it->ob_freeit = NULL;")
def outputCleanupStructMembers(self):
Output("if (self->ob_freeit && self->ob_itself)")
OutLbrace()
Output("self->ob_freeit(self->ob_itself);")
OutRbrace()
Output("self->ob_itself = NULL;")
resobject = ResDefinition('Resource', 'ResObj', 'Handle')
module.addobject(resobject)
functions = []
resmethods = []
execfile('resgen.py')
execfile('resedit.py')
for f in functions: module.add(f)
for f in resmethods: resobject.add(f)
SetOutputFileName('Resmodule.c')
module.generate()
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