Mac/Modules/cm/cmsupport.py

   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()