mirror of https://github.com/python/cpython
153 lines
4.6 KiB
Python
153 lines
4.6 KiB
Python
# This script generates a Python interface for an Apple Macintosh Manager.
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# It uses the "bgen" package to generate C code.
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# The function specifications are generated by scanning the mamager's header file,
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# using the "scantools" package (customized for this particular manager).
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import string
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# Declarations that change for each manager
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MACHEADERFILE = 'Lists.h' # The Apple header file
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MODNAME = 'List' # The name of the module
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OBJECTNAME = 'List' # The basic name of the objects used here
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KIND = 'Handle' # Usually 'Ptr' or 'Handle'
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# The following is *usually* unchanged but may still require tuning
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MODPREFIX = MODNAME # The prefix for module-wide routines
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OBJECTTYPE = "ListHandle" # The C type used to represent them
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OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
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INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
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OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
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from macsupport import *
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# Create the type objects
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ListHandle = OpaqueByValueType("ListHandle", "ListObj")
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Cell = Point
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VarOutBufferShortsize = VarHeapOutputBufferType('char', 'short', 's') # (buf, &len)
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InBufferShortsize = VarInputBufferType('char', 'short', 's') # (buf, len)
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RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
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Handle = OpaqueByValueType("Handle", "ResObj")
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includestuff = includestuff + """
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#include <%s>""" % MACHEADERFILE + """
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#define as_List(x) ((ListHandle)x)
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#define as_Resource(lh) ((Handle)lh)
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"""
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class ListMethodGenerator(MethodGenerator):
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"""Similar to MethodGenerator, but has self as last argument"""
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def parseArgumentList(self, args):
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args, a0 = args[:-1], args[-1]
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t0, n0, m0 = a0
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if m0 != InMode:
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raise ValueError, "method's 'self' must be 'InMode'"
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self.itself = Variable(t0, "_self->ob_itself", SelfMode)
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FunctionGenerator.parseArgumentList(self, args)
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self.argumentList.append(self.itself)
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getattrHookCode = """{
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/* XXXX Should we HLock() here?? */
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if ( strcmp(name, "listFlags") == 0 )
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return Py_BuildValue("l", (long)(*self->ob_itself)->listFlags & 0xff);
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if ( strcmp(name, "selFlags") == 0 )
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return Py_BuildValue("l", (long)(*self->ob_itself)->selFlags & 0xff);
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}"""
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setattrCode = """
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static int
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ListObj_setattr(self, name, value)
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ListObject *self;
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char *name;
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PyObject *value;
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{
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long intval;
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if ( value == NULL || !PyInt_Check(value) )
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return -1;
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intval = PyInt_AsLong(value);
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if (strcmp(name, "listFlags") == 0 ) {
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/* XXXX Should we HLock the handle here?? */
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(*self->ob_itself)->listFlags = intval;
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return 0;
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}
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if (strcmp(name, "selFlags") == 0 ) {
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(*self->ob_itself)->selFlags = intval;
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return 0;
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}
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return -1;
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}
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"""
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class MyObjectDefinition(GlobalObjectDefinition):
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def outputStructMembers(self):
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ObjectDefinition.outputStructMembers(self)
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Output("int ob_must_be_disposed;")
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def outputCheckNewArg(self):
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Output("""if (itself == NULL) {
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PyErr_SetString(List_Error,"Cannot create null List");
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return NULL;
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}""")
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def outputInitStructMembers(self):
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ObjectDefinition.outputInitStructMembers(self)
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Output("it->ob_must_be_disposed = 1;")
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def outputFreeIt(self, itselfname):
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Output("if (self->ob_must_be_disposed && %s) LDispose(%s);", itselfname, itselfname)
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def outputGetattrHook(self):
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Output(getattrHookCode)
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def outputSetattr(self):
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Output(setattrCode)
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# From here on it's basically all boiler plate...
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# Create the generator groups and link them
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module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
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object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
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module.addobject(object)
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# Create the generator classes used to populate the lists
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Function = FunctionGenerator
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Method = ListMethodGenerator
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# Create and populate the lists
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functions = []
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methods = []
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execfile(INPUTFILE)
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# Function to convert any handle to a list and vv.
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##f = Function(ListHandle, 'as_List', (Handle, 'h', InMode))
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as_List_body = """
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Handle h;
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ListObject *l;
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if (!PyArg_ParseTuple(_args, "O&", ResObj_Convert, &h))
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return NULL;
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l = (ListObject *)ListObj_New(as_List(h));
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l->ob_must_be_disposed = 0;
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return Py_BuildValue("O", l);
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"""
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f = ManualGenerator("as_List", as_List_body)
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f.docstring = lambda: "(Resource)->List.\nReturns List object (which is not auto-freed!)"
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functions.append(f)
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f = Method(Handle, 'as_Resource', (ListHandle, 'lh', InMode))
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methods.append(f)
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# add the populated lists to the generator groups
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# (in a different wordl the scan program would generate this)
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for f in functions: module.add(f)
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for f in methods: object.add(f)
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# generate output (open the output file as late as possible)
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SetOutputFileName(OUTPUTFILE)
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module.generate()
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