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3282
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1 # This script generates a Python interface for an Apple Macintosh Manager.
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2 # It uses the "bgen" package to generate C code.
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3 # The function specifications are generated by scanning the mamager's header file,
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4 # using the "scantools" package (customized for this particular manager).
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5
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6 import string
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7
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8 # Declarations that change for each manager
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9 MACHEADERFILE = 'Components.h' # The Apple header file
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10 MODNAME = 'Cm' # The name of the module
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11
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12 # The following is *usually* unchanged but may still require tuning
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13 MODPREFIX = MODNAME # The prefix for module-wide routines
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14 C_OBJECTPREFIX = 'CmpObj' # The prefix for object methods
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15 CI_OBJECTPREFIX = 'CmpInstObj'
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16 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
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17 OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
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18
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19 from macsupport import *
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20
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21 # Create the type objects
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22
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23 includestuff = includestuff + """
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24 #include <%s>""" % MACHEADERFILE + """
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25
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26 /*
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27 ** Parse/generate ComponentDescriptor records
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28 */
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29 PyObject *CmpDesc_New(itself)
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30 ComponentDescription *itself;
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31 {
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32
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33 return Py_BuildValue("O&O&O&ll",
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34 PyMac_BuildOSType, itself->componentType,
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35 PyMac_BuildOSType, itself->componentSubType,
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36 PyMac_BuildOSType, itself->componentManufacturer,
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37 itself->componentFlags, itself->componentFlagsMask);
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38 }
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39
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40 CmpDesc_Convert(v, p_itself)
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41 PyObject *v;
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42 ComponentDescription *p_itself;
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43 {
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44 return PyArg_ParseTuple(v, "O&O&O&ll",
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45 PyMac_GetOSType, &p_itself->componentType,
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46 PyMac_GetOSType, &p_itself->componentSubType,
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47 PyMac_GetOSType, &p_itself->componentManufacturer,
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48 &p_itself->componentFlags, &p_itself->componentFlagsMask);
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49 }
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50
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51 """
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52
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53 ComponentDescription = OpaqueType('ComponentDescription', 'CmpDesc')
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54 Component = OpaqueByValueType('Component', C_OBJECTPREFIX)
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55 ComponentInstance = OpaqueByValueType('ComponentInstance', CI_OBJECTPREFIX)
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56 ComponentResult = Type("ComponentResult", "l")
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57
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58 ComponentResourceHandle = OpaqueByValueType("ComponentResourceHandle", "ResObj")
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59
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60 class MyCIObjectDefinition(GlobalObjectDefinition):
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61 def outputCheckNewArg(self):
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62 Output("""if (itself == NULL) {
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63 PyErr_SetString(Cm_Error,"NULL ComponentInstance");
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64 return NULL;
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65 }""")
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66
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67 class MyCObjectDefinition(GlobalObjectDefinition):
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68 def outputCheckNewArg(self):
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69 Output("""if (itself == NULL) {
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70 /* XXXX Or should we return None? */
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71 PyErr_SetString(Cm_Error,"No such component");
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72 return NULL;
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73 }""")
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74
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75 def outputCheckConvertArg(self):
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76 Output("""if ( v == Py_None ) {
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77 *p_itself = 0;
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78 return 1;
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79 }""")
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80
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81 # Create the generator groups and link them
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82 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
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83 ci_object = MyCIObjectDefinition('ComponentInstance', CI_OBJECTPREFIX,
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84 'ComponentInstance')
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85 c_object = MyCObjectDefinition('Component', C_OBJECTPREFIX, 'Component')
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86 module.addobject(ci_object)
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87 module.addobject(c_object)
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88
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89 # Create the generator classes used to populate the lists
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90 Function = OSErrFunctionGenerator
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91 Method = OSErrMethodGenerator
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92
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93 # Create and populate the lists
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94 functions = []
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95 c_methods = []
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96 ci_methods = []
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97 execfile(INPUTFILE)
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98
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99 # add the populated lists to the generator groups
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100 # (in a different wordl the scan program would generate this)
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101 for f in functions: module.add(f)
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102 for f in c_methods: c_object.add(f)
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103 for f in ci_methods: ci_object.add(f)
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104
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105 # generate output (open the output file as late as possible)
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106 SetOutputFileName(OUTPUTFILE)
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107 module.generate()
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108
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