Mercurial > cpython-lru_cache-weakref

annotate Mac/Modules/snd/sndsupport.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 341146100f38
children ca66a2536cd5
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1 # This script generates the Sound interface for Python.
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2 # It uses the "bgen" package to generate C code.
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3 # It execs the file sndgen.py which contain the function definitions
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4 # (sndgen.py was generated by sndscan.py, scanning the <Sound.h> header file).
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5
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6 import addpack
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7 addpack.addpack(':Tools:bgen:bgen')
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8
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9 from macsupport import *
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10
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11
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12 # define our own function and module generators
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13
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14 class SndMixIn: pass
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15
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16 class SndFunction(SndMixIn, OSErrFunctionGenerator): pass
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17 class SndMethod(SndMixIn, OSErrMethodGenerator): pass
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18
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19
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20 # includestuff etc. are imported from macsupport
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21
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22 includestuff = includestuff + """
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23 #include <Sound.h>
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24
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25 #ifndef HAVE_UNIVERSAL_HEADERS
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26 #define SndCallBackUPP ProcPtr
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27 #define NewSndCallBackProc(x) ((SndCallBackProcPtr)(x))
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28 #define SndListHandle Handle
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29 #endif
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30 """
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31
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32 initstuff = initstuff + """
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33 """
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34
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35
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36 # define types used for arguments (in addition to standard and macsupport types)
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37
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38 class SndChannelPtrType(OpaqueByValueType):
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39 def declare(self, name):
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40 # Initializing all SndChannelPtr objects to 0 saves
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41 # special-casing NewSndChannel(), where it is formally an
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42 # input-output parameter but we treat it as output-only
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43 # (since Python users are not supposed to allocate memory)
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44 Output("SndChannelPtr %s = 0;", name)
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45
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46 SndChannelPtr = SndChannelPtrType('SndChannelPtr', 'SndCh')
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47
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48 SndCommand = OpaqueType('SndCommand', 'SndCmd')
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49 SndCommand_ptr = OpaqueType('SndCommand', 'SndCmd')
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50 SndListHandle = OpaqueByValueType("SndListHandle", "ResObj")
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51
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52 class SndCallBackType(InputOnlyType):
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53 def __init__(self):
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54 Type.__init__(self, 'PyObject*', 'O')
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55 def getargsCheck(self, name):
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56 Output("if (%s != Py_None && !PyCallable_Check(%s))", name, name)
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57 OutLbrace()
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58 Output('PyErr_SetString(PyExc_TypeError, "callback must be callable");')
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59 Output("goto %s__error__;", name)
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60 OutRbrace()
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61 def passInput(self, name):
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62 return "NewSndCallBackProc(SndCh_UserRoutine)"
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63 def cleanup(self, name):
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64 # XXX This knows it is executing inside the SndNewChannel wrapper
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65 Output("if (_res != NULL && %s != Py_None)", name)
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66 OutLbrace()
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67 Output("SndChannelObject *p = (SndChannelObject *)_res;")
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68 Output("p->ob_itself->userInfo = (long)p;")
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69 Output("Py_INCREF(%s);", name)
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70 Output("p->ob_callback = %s;", name)
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71 OutRbrace()
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72 DedentLevel()
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73 Output(" %s__error__: ;", name)
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74 IndentLevel()
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75
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76 SndCallBackProcPtr = SndCallBackType()
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77 SndCallBackUPP = SndCallBackProcPtr
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78
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79 SndCompletionProcPtr = FakeType('(SndCompletionProcPtr)0') # XXX
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80 SndCompletionUPP = SndCompletionProcPtr
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81
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82 ##InOutBuf128 = FixedInputOutputBufferType(128)
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83 StateBlock = StructInputOutputBufferType('StateBlock')
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84
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85 AudioSelectionPtr = FakeType('0') # XXX
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86
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87 ProcPtr = FakeType('0') # XXX
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88 FilePlayCompletionUPP = FakeType('0') # XXX
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89
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90 SCStatus = StructOutputBufferType('SCStatus')
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91 SMStatus = StructOutputBufferType('SMStatus')
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92 CompressionInfo = StructOutputBufferType('CompressionInfo')
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93
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94 includestuff = includestuff + """
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95 #include <OSUtils.h> /* for Set(Current)A5 */
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96
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97 /* Create a SndCommand object (an (int, int, int) tuple) */
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98 static PyObject *
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99 SndCmd_New(SndCommand *pc)
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100 {
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101 return Py_BuildValue("hhl", pc->cmd, pc->param1, pc->param2);
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102 }
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103
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104 /* Convert a SndCommand argument */
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105 static int
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106 SndCmd_Convert(PyObject *v, SndCommand *pc)
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107 {
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108 int len;
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109 pc->param1 = 0;
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110 pc->param2 = 0;
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111 if (PyTuple_Check(v)) {
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112 if (PyArg_ParseTuple(v, "h|hl", &pc->cmd, &pc->param1, &pc->param2))
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113 return 1;
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114 PyErr_Clear();
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115 return PyArg_ParseTuple(v, "hhs#", &pc->cmd, &pc->param1, &pc->param2, &len);
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116 }
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117 return PyArg_Parse(v, "h", &pc->cmd);
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118 }
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119
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120 static pascal void SndCh_UserRoutine(SndChannelPtr chan, SndCommand *cmd); /* Forward */
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121 """
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122
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123
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124 finalstuff = finalstuff + """
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125 /* Routine passed to Py_AddPendingCall -- call the Python callback */
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126 static int
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127 SndCh_CallCallBack(arg)
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128 void *arg;
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129 {
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130 SndChannelObject *p = (SndChannelObject *)arg;
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131 PyObject *args;
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132 PyObject *res;
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133 args = Py_BuildValue("(O(hhl))",
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134 p, p->ob_cmd.cmd, p->ob_cmd.param1, p->ob_cmd.param2);
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135 res = PyEval_CallObject(p->ob_callback, args);
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136 Py_DECREF(args);
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137 if (res == NULL)
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138 return -1;
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139 Py_DECREF(res);
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140 return 0;
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141 }
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142
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143 /* Routine passed to NewSndChannel -- schedule a call to SndCh_CallCallBack */
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144 static pascal void
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145 SndCh_UserRoutine(SndChannelPtr chan, SndCommand *cmd)
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146 {
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147 SndChannelObject *p = (SndChannelObject *)(chan->userInfo);
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148 if (p->ob_callback != NULL) {
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149 long A5 = SetA5(p->ob_A5);
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150 p->ob_cmd = *cmd;
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151 Py_AddPendingCall(SndCh_CallCallBack, (void *)p);
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152 SetA5(A5);
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153 }
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154 }
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155 """
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156
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157
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158 # create the module and object definition and link them
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159
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160 class SndObjectDefinition(ObjectDefinition):
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161
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162 def outputStructMembers(self):
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163 ObjectDefinition.outputStructMembers(self)
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164 Output("/* Members used to implement callbacks: */")
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165 Output("PyObject *ob_callback;")
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166 Output("long ob_A5;");
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167 Output("SndCommand ob_cmd;")
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168
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169 def outputInitStructMembers(self):
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170 ObjectDefinition.outputInitStructMembers(self)
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171 Output("it->ob_callback = NULL;")
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172 Output("it->ob_A5 = SetCurrentA5();");
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173
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174 def outputCleanupStructMembers(self):
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175 ObjectDefinition.outputCleanupStructMembers(self)
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176 Output("Py_XDECREF(self->ob_callback);")
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177
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178 def outputFreeIt(self, itselfname):
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179 Output("SndDisposeChannel(%s, 1);", itselfname)
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180
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181
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182 sndobject = SndObjectDefinition('SndChannel', 'SndCh', 'SndChannelPtr')
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183 module = MacModule('Snd', 'Snd', includestuff, finalstuff, initstuff)
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184 module.addobject(sndobject)
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185
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186
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187 # create lists of functions and object methods
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188
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189 functions = []
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190 sndmethods = []
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191
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192
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193 # populate the lists
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194
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195 execfile('sndgen.py')
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196
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197
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198 # add the functions and methods to the module and object, respectively
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199
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200 for f in functions: module.add(f)
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201 for f in sndmethods: sndobject.add(f)
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202
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203
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204 # generate output
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205
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206 SetOutputFileName('Sndmodule.c')
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207 module.generate()