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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):
if self.returntype.__class__ != OSErrType:
OutLbrace()
Output("OSErr _err = ResError();")
Output("if (_err != noErr) return PyMac_Error(_err);")
OutRbrace()
FunctionGenerator.checkit(self) # XXX
class ResFunction(ResMixIn, OSErrWeakLinkFunctionGenerator): pass
class ResMethod(ResMixIn, OSErrWeakLinkMethodGenerator): pass
RsrcChainLocation = Type("RsrcChainLocation", "h")
FSCatalogInfoBitmap = FakeType("0") # Type("FSCatalogInfoBitmap", "l")
FSCatalogInfo_ptr = FakeType("(FSCatalogInfo *)0")
# includestuff etc. are imported from macsupport
includestuff = includestuff + """
#include <Carbon/Carbon.h>
#ifdef USE_TOOLBOX_OBJECT_GLUE
extern PyObject *_ResObj_New(Handle);
extern int _ResObj_Convert(PyObject *, Handle *);
extern PyObject *_OptResObj_New(Handle);
extern int _OptResObj_Convert(PyObject *, Handle *);
#define ResObj_New _ResObj_New
#define ResObj_Convert _ResObj_Convert
#define OptResObj_New _OptResObj_New
#define OptResObj_Convert _OptResObj_Convert
#endif
/* 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(Handle itself)
{
if (itself == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return ResObj_New(itself);
}
int OptResObj_Convert(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 + """
PyMac_INIT_TOOLBOX_OBJECT_NEW(Handle, ResObj_New);
PyMac_INIT_TOOLBOX_OBJECT_CONVERT(Handle, ResObj_Convert);
PyMac_INIT_TOOLBOX_OBJECT_NEW(Handle, OptResObj_New);
PyMac_INIT_TOOLBOX_OBJECT_CONVERT(Handle, OptResObj_Convert);
"""
module = MacModule('_Res', 'Res', includestuff, finalstuff, initstuff)
class ResDefinition(PEP253Mixin, GlobalObjectDefinition):
getsetlist = [
('data',
"""
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;
""",
"""
char *data;
long size;
if ( v == NULL )
return -1;
if ( !PyString_Check(v) )
return -1;
size = PyString_Size(v);
data = PyString_AsString(v);
/* 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 immediately? */
return 0;
""",
'The resource data'
), (
'size',
'return PyInt_FromLong(GetHandleSize(self->ob_itself));',
None,
'The length of the resource data'
)]
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 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;")
def output_tp_newBody(self):
Output("PyObject *self;")
Output
Output("if ((self = type->tp_alloc(type, 0)) == NULL) return NULL;")
Output("((%s *)self)->ob_itself = NULL;", self.objecttype)
Output("((%s *)self)->ob_freeit = NULL;", self.objecttype)
Output("return self;")
def output_tp_initBody(self):
Output("char *srcdata = NULL;")
Output("int srclen = 0;")
Output("%s itself;", self.itselftype);
Output("char *kw[] = {\"itself\", 0};")
Output()
Output("if (PyArg_ParseTupleAndKeywords(_args, _kwds, \"O&\", kw, %s_Convert, &itself))",
self.prefix);
OutLbrace()
Output("((%s *)_self)->ob_itself = itself;", self.objecttype)
Output("return 0;")
OutRbrace()
Output("PyErr_Clear();")
Output("if (!PyArg_ParseTupleAndKeywords(_args, _kwds, \"|s#\", kw, &srcdata, &srclen)) return -1;")
Output("if ((itself = NewHandle(srclen)) == NULL)")
OutLbrace()
Output("PyErr_NoMemory();")
Output("return 0;")
OutRbrace()
Output("((%s *)_self)->ob_itself = itself;", self.objecttype)
# XXXX Output("((%s *)self)->ob_freeit = PyMac_AutoDisposeHandle;")
Output("if (srclen && srcdata)")
OutLbrace()
Output("HLock(itself);")
Output("memcpy(*itself, srcdata, srclen);")
Output("HUnlock(itself);")
OutRbrace()
Output("return 0;")
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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