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 #ifdef WITHOUT_FRAMEWORKS
  25 #include <Components.h>
  26 #else
  27 #include <Carbon/Carbon.h>
  28 #endif
  29
  30 #ifdef USE_TOOLBOX_OBJECT_GLUE
  31 extern PyObject *_CmpObj_New(Component);
  32 extern int _CmpObj_Convert(PyObject *, Component *);
  33 extern PyObject *_CmpInstObj_New(ComponentInstance);
  34 extern int _CmpInstObj_Convert(PyObject *, ComponentInstance *);
  35
  36 #define CmpObj_New _CmpObj_New
  37 #define CmpObj_Convert _CmpObj_Convert
  38 #define CmpInstObj_New _CmpInstObj_New
  39 #define CmpInstObj_Convert _CmpInstObj_Convert
  40 #endif
  41
  42 /*
  43 ** Parse/generate ComponentDescriptor records
  44 */
  45 static PyObject *
  46 CmpDesc_New(ComponentDescription *itself)
  47 {
  48
  49         return Py_BuildValue("O&O&O&ll",
  50                 PyMac_BuildOSType, itself->componentType,
  51                 PyMac_BuildOSType, itself->componentSubType,
  52                 PyMac_BuildOSType, itself->componentManufacturer,
  53                 itself->componentFlags, itself->componentFlagsMask);
  54 }
  55
  56 static int
  57 CmpDesc_Convert(PyObject *v, ComponentDescription *p_itself)
  58 {
  59         return PyArg_ParseTuple(v, "O&O&O&ll",
  60                 PyMac_GetOSType, &p_itself->componentType,
  61                 PyMac_GetOSType, &p_itself->componentSubType,
  62                 PyMac_GetOSType, &p_itself->componentManufacturer,
  63                 &p_itself->componentFlags, &p_itself->componentFlagsMask);
  64 }
  65
  66 """
  67
  68 initstuff = initstuff + """
  69         PyMac_INIT_TOOLBOX_OBJECT_NEW(Component, CmpObj_New);
  70         PyMac_INIT_TOOLBOX_OBJECT_CONVERT(Component, CmpObj_Convert);
  71         PyMac_INIT_TOOLBOX_OBJECT_NEW(ComponentInstance, CmpInstObj_New);
  72         PyMac_INIT_TOOLBOX_OBJECT_CONVERT(ComponentInstance, CmpInstObj_Convert);
  73 """
  74
  75 ComponentDescription = OpaqueType('ComponentDescription', 'CmpDesc')
  76 Component = OpaqueByValueType('Component', C_OBJECTPREFIX)
  77 ComponentInstance = OpaqueByValueType('ComponentInstance', CI_OBJECTPREFIX)
  78 ComponentResult = Type("ComponentResult", "l")
  79
  80 ComponentResourceHandle = OpaqueByValueType("ComponentResourceHandle", "ResObj")
  81
  82 class MyCIObjectDefinition(GlobalObjectDefinition):
  83         def outputCheckNewArg(self):
  84                 Output("""if (itself == NULL) {
  85                                         PyErr_SetString(Cm_Error,"NULL ComponentInstance");
  86                                         return NULL;
  87                                 }""")
  88
  89 class MyCObjectDefinition(GlobalObjectDefinition):
  90         def outputCheckNewArg(self):
  91                 Output("""if (itself == NULL) {
  92                                         /* XXXX Or should we return None? */
  93                                         PyErr_SetString(Cm_Error,"No such component");
  94                                         return NULL;
  95                                 }""")
  96
  97         def outputCheckConvertArg(self):
  98                 Output("""if ( v == Py_None ) {
  99                                         *p_itself = 0;
 100                                         return 1;
 101                 }""")
 102
 103 # Create the generator groups and link them
 104 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
 105 ci_object = MyCIObjectDefinition('ComponentInstance', CI_OBJECTPREFIX,
 106                 'ComponentInstance')
 107 c_object = MyCObjectDefinition('Component', C_OBJECTPREFIX, 'Component')
 108 module.addobject(ci_object)
 109 module.addobject(c_object)
 110
 111 # Create the generator classes used to populate the lists
 112 Function = OSErrWeakLinkFunctionGenerator
 113 Method = OSErrWeakLinkMethodGenerator
 114
 115 # Create and populate the lists
 116 functions = []
 117 c_methods = []
 118 ci_methods = []
 119 execfile(INPUTFILE)
 120
 121 # add the populated lists to the generator groups
 122 # (in a different wordl the scan program would generate this)
 123 for f in functions: module.add(f)
 124 for f in c_methods: c_object.add(f)
 125 for f in ci_methods: ci_object.add(f)
 126
 127 # generate output (open the output file as late as possible)
 128 SetOutputFileName(OUTPUTFILE)
 129 module.generate()
 130