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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 = 'Components.h' # The Apple header file
MODNAME = 'Cm' # The name of the module
# The following is *usually* unchanged but may still require tuning
MODPREFIX = MODNAME # The prefix for module-wide routines
C_OBJECTPREFIX = 'CmpObj' # The prefix for object methods
CI_OBJECTPREFIX = 'CmpInstObj'
INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
from macsupport import *
# Create the type objects
includestuff = includestuff + """
#include <%s>""" % MACHEADERFILE + """
/*
** Parse/generate ComponentDescriptor records
*/
PyObject *CmpDesc_New(itself)
ComponentDescription *itself;
{
return Py_BuildValue("O&O&O&ll",
PyMac_BuildOSType, itself->componentType,
PyMac_BuildOSType, itself->componentSubType,
PyMac_BuildOSType, itself->componentManufacturer,
itself->componentFlags, itself->componentFlagsMask);
}
CmpDesc_Convert(v, p_itself)
PyObject *v;
ComponentDescription *p_itself;
{
return PyArg_ParseTuple(v, "O&O&O&ll",
PyMac_GetOSType, &p_itself->componentType,
PyMac_GetOSType, &p_itself->componentSubType,
PyMac_GetOSType, &p_itself->componentManufacturer,
&p_itself->componentFlags, &p_itself->componentFlagsMask);
}
"""
ComponentDescription = OpaqueType('ComponentDescription', 'CmpDesc')
Component = OpaqueByValueType('Component', C_OBJECTPREFIX)
ComponentInstance = OpaqueByValueType('ComponentInstance', CI_OBJECTPREFIX)
ComponentResult = Type("ComponentResult", "l")
ComponentResourceHandle = OpaqueByValueType("ComponentResourceHandle", "ResObj")
class MyCIObjectDefinition(GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("""if (itself == NULL) {
PyErr_SetString(Cm_Error,"NULL ComponentInstance");
return NULL;
}""")
class MyCObjectDefinition(GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("""if (itself == NULL) {
/* XXXX Or should we return None? */
PyErr_SetString(Cm_Error,"No such component");
return NULL;
}""")
def outputCheckConvertArg(self):
Output("""if ( v == Py_None ) {
*p_itself = 0;
return 1;
}""")
# Create the generator groups and link them
module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
ci_object = MyCIObjectDefinition('ComponentInstance', CI_OBJECTPREFIX,
'ComponentInstance')
c_object = MyCObjectDefinition('Component', C_OBJECTPREFIX, 'Component')
module.addobject(ci_object)
module.addobject(c_object)
# Create the generator classes used to populate the lists
Function = OSErrFunctionGenerator
Method = OSErrMethodGenerator
# Create and populate the lists
functions = []
c_methods = []
ci_methods = []
execfile(INPUTFILE)
# 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 c_methods: c_object.add(f)
for f in ci_methods: ci_object.add(f)
# generate output (open the output file as late as possible)
SetOutputFileName(OUTPUTFILE)
module.generate()
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