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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 = 'Lists.h' # The Apple header file
MODNAME = 'List' # The name of the module
OBJECTNAME = 'List' # The basic name of the objects used here
KIND = 'Handle' # Usually 'Ptr' or 'Handle'
# The following is *usually* unchanged but may still require tuning
MODPREFIX = MODNAME # The prefix for module-wide routines
OBJECTTYPE = "ListHandle" # The C type used to represent them
OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
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
ListHandle = OpaqueByValueType("ListHandle", "ListObj")
Cell = Point
VarOutBufferShortsize = VarHeapOutputBufferType('char', 'short', 's') # (buf, &len)
InBufferShortsize = VarInputBufferType('char', 'short', 's') # (buf, len)
RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
Handle = OpaqueByValueType("Handle", "ResObj")
includestuff = includestuff + """
#include <%s>""" % MACHEADERFILE + """
#define as_List(x) ((ListHandle)x)
#define as_Resource(lh) ((Handle)lh)
"""
class ListMethodGenerator(MethodGenerator):
"""Similar to MethodGenerator, but has self as last argument"""
def parseArgumentList(self, args):
args, a0 = args[:-1], args[-1]
t0, n0, m0 = a0
if m0 != InMode:
raise ValueError, "method's 'self' must be 'InMode'"
self.itself = Variable(t0, "_self->ob_itself", SelfMode)
FunctionGenerator.parseArgumentList(self, args)
self.argumentList.append(self.itself)
getattrHookCode = """{
/* XXXX Should we HLock() here?? */
if ( strcmp(name, "listFlags") == 0 )
return Py_BuildValue("l", (long)(*self->ob_itself)->listFlags & 0xff);
if ( strcmp(name, "selFlags") == 0 )
return Py_BuildValue("l", (long)(*self->ob_itself)->selFlags & 0xff);
}"""
setattrCode = """
static int
ListObj_setattr(self, name, value)
ListObject *self;
char *name;
PyObject *value;
{
long intval;
if ( value == NULL || !PyInt_Check(value) )
return -1;
intval = PyInt_AsLong(value);
if (strcmp(name, "listFlags") == 0 ) {
/* XXXX Should we HLock the handle here?? */
(*self->ob_itself)->listFlags = intval;
return 0;
}
if (strcmp(name, "selFlags") == 0 ) {
(*self->ob_itself)->selFlags = intval;
return 0;
}
return -1;
}
"""
class MyObjectDefinition(GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("""if (itself == NULL) {
PyErr_SetString(List_Error,"Cannot create null List");
return NULL;
}""")
def outputFreeIt(self, itselfname):
Output("LDispose(%s);", itselfname)
def outputGetattrHook(self):
Output(getattrHookCode)
def outputSetattr(self):
Output(setattrCode)
# 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 = FunctionGenerator
Method = ListMethodGenerator
# Create and populate the lists
functions = []
methods = []
execfile(INPUTFILE)
# Function to convert any handle to a list and vv.
f = Function(ListHandle, 'as_List', (Handle, 'h', InMode))
functions.append(f)
f = Method(Handle, 'as_Resource', (ListHandle, 'lh', InMode))
methods.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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