Mercurial > cpython-lru_cache-weakref

annotate Mac/Modules/ctl/ctlsupport.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 852ca23c80cc
children 4e53746e51af
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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 import addpack
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9 addpack.addpack(':Tools:bgen:bgen')
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10
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11 # Declarations that change for each manager
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12 MACHEADERFILE = 'Controls.h' # The Apple header file
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13 MODNAME = 'Ctl' # The name of the module
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14 OBJECTNAME = 'Control' # The basic name of the objects used here
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15
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16 # The following is *usually* unchanged but may still require tuning
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17 MODPREFIX = MODNAME # The prefix for module-wide routines
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18 OBJECTTYPE = OBJECTNAME + 'Handle' # The C type used to represent them
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19 OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
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20 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
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21 OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
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22
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23 from macsupport import *
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24
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25 # Create the type objects
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26
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27 ControlHandle = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
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28 ControlRef = ControlHandle
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29 ExistingControlHandle = OpaqueByValueType(OBJECTTYPE, "CtlObj_WhichControl", "BUG")
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30
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31 RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
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32 ControlPartCode = Type("ControlPartCode", "h")
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33 DragConstraint = Type("DragConstraint", "h")
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34
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35 includestuff = includestuff + """
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36 #include <%s>""" % MACHEADERFILE + """
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37
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38 #define resNotFound -192 /* Can't include <Errors.h> because of Python's "errors.h" */
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39
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40 extern PyObject *CtlObj_WhichControl(ControlHandle); /* Forward */
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41
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42 #ifdef THINK_C
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43 #define ControlActionUPP ProcPtr
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44 #endif
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45 """
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46
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47 finalstuff = finalstuff + """
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48 PyObject *
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49 CtlObj_WhichControl(ControlHandle c)
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50 {
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51 PyObject *it;
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52
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53 /* XXX What if we find a control belonging to some other package? */
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54 if (c == NULL)
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55 it = NULL;
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56 else
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57 it = (PyObject *) GetCRefCon(c);
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58 if (it == NULL || ((ControlObject *)it)->ob_itself != c)
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59 it = Py_None;
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60 Py_INCREF(it);
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61 return it;
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62 }
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63 """
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64
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65 class MyObjectDefinition(GlobalObjectDefinition):
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66 def outputCheckNewArg(self):
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67 Output("if (itself == NULL) return PyMac_Error(resNotFound);")
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68 def outputInitStructMembers(self):
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69 GlobalObjectDefinition.outputInitStructMembers(self)
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70 Output("SetCRefCon(itself, (long)it);")
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71 def outputCleanupStructMembers(self):
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72 Output("if (self->ob_itself) SetCRefCon(self->ob_itself, (long)0); /* Make it forget about us */")
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73
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74 # Create the generator groups and link them
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75 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
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76 object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
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77 module.addobject(object)
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78
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79 # Create the generator classes used to populate the lists
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80 Function = OSErrFunctionGenerator
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81 Method = OSErrMethodGenerator
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82
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83 # Create and populate the lists
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84 functions = []
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85 methods = []
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86 execfile(INPUTFILE)
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87 execfile('ctledit.py')
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88
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89 # add the populated lists to the generator groups
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90 for f in functions: module.add(f)
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91 for f in methods: object.add(f)
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92
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93 # generate output (open the output file as late as possible)
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94 SetOutputFileName(OUTPUTFILE)
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95 module.generate()