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# 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 = 'QDOffscreen.h' # The Apple header file
MODNAME = 'Qdoffs' # The name of the module
OBJECTNAME = 'GWorld' # The basic name of the objects used here
# The following is *usually* unchanged but may still require tuning
MODPREFIX = MODNAME # The prefix for module-wide routines
OBJECTTYPE = OBJECTNAME + 'Ptr' # The C type used to represent them
OBJECTPREFIX = OBJECTNAME + 'Obj' # The prefix for object methods
INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
#EDITFILE = string.lower(MODPREFIX) + 'edit.py' # The manual definitions
OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
from macsupport import *
# Create the type objects
GWorldPtr = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
GWorldFlags = Type("GWorldFlags", "l")
GDHandle = OpaqueByValueType("GDHandle", "ResObj")
OptGDHandle = OpaqueByValueType("GDHandle", "OptResObj")
CTabHandle = OpaqueByValueType("CTabHandle", "OptResObj")
PixPatHandle = OpaqueByValueType("PixPatHandle", "ResObj")
PixMapHandle = OpaqueByValueType("PixMapHandle", "ResObj")
CGrafPtr = OpaqueByValueType("CGrafPtr", "GrafObj")
GrafPtr = OpaqueByValueType("GrafPtr", "GrafObj")
QDErr = OSErrType("QDErr", 'h')
includestuff = includestuff + """
#include <%s>""" % MACHEADERFILE + """
#define as_GrafPtr(gworld) ((GrafPtr)(gworld))
#define resNotFound -192 /* Can't include <Errors.h> because of Python's "errors.h" */
"""
class MyObjectDefinition(GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("if (itself == NULL) return PyMac_Error(resNotFound);")
## def outputInitStructMembers(self):
## GlobalObjectDefinition.outputInitStructMembers(self)
## Output("SetWRefCon(itself, (long)it);")
## def outputCheckConvertArg(self):
## OutLbrace("if (DlgObj_Check(v))")
## Output("*p_itself = ((WindowObject *)v)->ob_itself;")
## Output("return 1;")
## OutRbrace()
## Out("""
## if (v == Py_None) { *p_itself = NULL; return 1; }
## if (PyInt_Check(v)) { *p_itself = (WindowPtr)PyInt_AsLong(v); return 1; }
## """)
def outputFreeIt(self, itselfname):
Output("DisposeGWorld(%s);", itselfname)
# From here on it's basically all boiler plate...
# Create the generator groups and link them
module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
module.addobject(object)
# Create the generator classes used to populate the lists
Function = OSErrFunctionGenerator
Method = OSErrMethodGenerator
# Create and populate the lists
functions = []
methods = []
execfile(INPUTFILE)
# A method to convert a GWorldPtr to a GrafPtr
f = Method(GrafPtr, 'as_GrafPtr', (GWorldPtr, 'p', InMode))
methods.append(f)
#
# Manual generator: get data out of a pixmap
pixmapgetbytes_body = """
PixMapHandle pm;
int from, length;
char *cp;
if ( !PyArg_ParseTuple(_args, "O&ii", ResObj_Convert, &pm, &from, &length) )
return NULL;
cp = GetPixBaseAddr(pm)+from;
return PyString_FromStringAndSize(cp, length);
"""
f = ManualGenerator("GetPixMapBytes", pixmapgetbytes_body)
f.docstring = lambda: """(pixmap, int start, int size) -> string. Return bytes from the pixmap"""
functions.append(f)
# Manual generator: store data in a pixmap
pixmapputbytes_body = """
PixMapHandle pm;
int from, length;
char *cp, *icp;
if ( !PyArg_ParseTuple(_args, "O&is#", ResObj_Convert, &pm, &from, &icp, &length) )
return NULL;
cp = GetPixBaseAddr(pm)+from;
memcpy(cp, icp, length);
Py_INCREF(Py_None);
return Py_None;
"""
f = ManualGenerator("PutPixMapBytes", pixmapputbytes_body)
f.docstring = lambda: """(pixmap, int start, string data). Store bytes into the pixmap"""
functions.append(f)
# 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)
for f in methods: object.add(f)
# generate output (open the output file as late as possible)
SetOutputFileName(OUTPUTFILE)
module.generate()
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