1 # This script generates a Python interface for an Apple Macintosh Manager.

     2 # It uses the "bgen" package to generate C code.

     3 # The function specifications are generated by scanning the mamager's header file,

     4 # using the "scantools" package (customized for this particular manager).

     5 

     6 import string

     7 

     8 # Declarations that change for each manager

     9 MACHEADERFILE = 'Components.h'          # The Apple header file

    10 MODNAME = '_Cm'                         # The name of the module

    11 

    12 # The following is *usually* unchanged but may still require tuning

    13 MODPREFIX = 'Cm'                        # The prefix for module-wide routines

    14 C_OBJECTPREFIX = 'CmpObj'       # The prefix for object methods

    15 CI_OBJECTPREFIX = 'CmpInstObj'

    16 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner

    17 OUTPUTFILE = MODNAME + "module.c"       # The file generated by this program

    18 

    19 from macsupport import *

    20 

    21 # Create the type objects

    22 

    23 includestuff = includestuff + """

    24 #include <Carbon/Carbon.h>

    25 

    26 #ifdef USE_TOOLBOX_OBJECT_GLUE

    27 extern PyObject *_CmpObj_New(Component);

    28 extern int _CmpObj_Convert(PyObject *, Component *);

    29 extern PyObject *_CmpInstObj_New(ComponentInstance);

    30 extern int _CmpInstObj_Convert(PyObject *, ComponentInstance *);

    31 

    32 #define CmpObj_New _CmpObj_New

    33 #define CmpObj_Convert _CmpObj_Convert

    34 #define CmpInstObj_New _CmpInstObj_New

    35 #define CmpInstObj_Convert _CmpInstObj_Convert

    36 #endif

    37 

    38 /*

    39 ** Parse/generate ComponentDescriptor records

    40 */

    41 static PyObject *

    42 CmpDesc_New(ComponentDescription *itself)

    43 {

    44 

    45         return Py_BuildValue("O&O&O&ll",

    46                 PyMac_BuildOSType, itself->componentType,

    47                 PyMac_BuildOSType, itself->componentSubType,

    48                 PyMac_BuildOSType, itself->componentManufacturer,

    49                 itself->componentFlags, itself->componentFlagsMask);

    50 }

    51 

    52 static int

    53 CmpDesc_Convert(PyObject *v, ComponentDescription *p_itself)

    54 {

    55         return PyArg_ParseTuple(v, "O&O&O&ll",

    56                 PyMac_GetOSType, &p_itself->componentType,

    57                 PyMac_GetOSType, &p_itself->componentSubType,

    58                 PyMac_GetOSType, &p_itself->componentManufacturer,

    59                 &p_itself->componentFlags, &p_itself->componentFlagsMask);

    60 }

    61 

    62 """

    63 

    64 initstuff = initstuff + """

    65         PyMac_INIT_TOOLBOX_OBJECT_NEW(Component, CmpObj_New);

    66         PyMac_INIT_TOOLBOX_OBJECT_CONVERT(Component, CmpObj_Convert);

    67         PyMac_INIT_TOOLBOX_OBJECT_NEW(ComponentInstance, CmpInstObj_New);

    68         PyMac_INIT_TOOLBOX_OBJECT_CONVERT(ComponentInstance, CmpInstObj_Convert);

    69 """

    70 

    71 ComponentDescription = OpaqueType('ComponentDescription', 'CmpDesc')

    72 Component = OpaqueByValueType('Component', C_OBJECTPREFIX)

    73 ComponentInstance = OpaqueByValueType('ComponentInstance', CI_OBJECTPREFIX)

    74 ComponentResult = Type("ComponentResult", "l")

    75 

    76 ComponentResourceHandle = OpaqueByValueType("ComponentResourceHandle", "ResObj")

    77 

    78 class MyCIObjectDefinition(PEP253Mixin, GlobalObjectDefinition):

    79     def outputCheckNewArg(self):

    80         Output("""if (itself == NULL) {

    81                                 PyErr_SetString(Cm_Error,"NULL ComponentInstance");

    82                                 return NULL;

    83                         }""")

    84 

    85 class MyCObjectDefinition(PEP253Mixin, GlobalObjectDefinition):

    86     def outputCheckNewArg(self):

    87         Output("""if (itself == NULL) {

    88                                 /* XXXX Or should we return None? */

    89                                 PyErr_SetString(Cm_Error,"No such component");

    90                                 return NULL;

    91                         }""")

    92 

    93     def outputCheckConvertArg(self):

    94         Output("""if ( v == Py_None ) {

    95                                 *p_itself = 0;

    96                                 return 1;

    97         }""")

    98 

    99 # Create the generator groups and link them

   100 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)

   101 ci_object = MyCIObjectDefinition('ComponentInstance', CI_OBJECTPREFIX,

   102                 'ComponentInstance')

   103 c_object = MyCObjectDefinition('Component', C_OBJECTPREFIX, 'Component')

   104 module.addobject(ci_object)

   105 module.addobject(c_object)

   106 

   107 # Create the generator classes used to populate the lists

   108 Function = OSErrWeakLinkFunctionGenerator

   109 Method = OSErrWeakLinkMethodGenerator

   110 

   111 # Create and populate the lists

   112 functions = []

   113 c_methods = []

   114 ci_methods = []

   115 execfile(INPUTFILE)

   116 

   117 # add the populated lists to the generator groups

   118 # (in a different wordl the scan program would generate this)

   119 for f in functions: module.add(f)

   120 for f in c_methods: c_object.add(f)

   121 for f in ci_methods: ci_object.add(f)

   122 

   123 # generate output (open the output file as late as possible)

   124 SetOutputFileName(OUTPUTFILE)

   125 module.generate()