Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 14017:128f641191c3 legacy-trunk
_PySys_Init(): Fix another Insure discovered memory leak; the PyString
created from the "big"/"little" constant needs to be decref'd.
| author | Barry Warsaw <barry@python.org> |
|---|---|
| date | Wed, 16 Aug 2000 23:03:57 +0000 |
| parents | eb9a36163a9e |
| children | e5253b692e9f |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright (c) 2000, BeOpen.com. |
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3 Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
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4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
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5 All rights reserved. |
| 145 | 6 |
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7 See the file "Misc/COPYRIGHT" for information on usage and |
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8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 145 | 9 ******************************************************************/ |
| 10 | |
| 6 | 11 /* System module */ |
| 12 | |
| 13 /* | |
| 14 Various bits of information used by the interpreter are collected in | |
| 15 module 'sys'. | |
| 86 | 16 Function member: |
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17 - exit(sts): raise SystemExit |
| 6 | 18 Data members: |
| 19 - stdin, stdout, stderr: standard file objects | |
| 86 | 20 - modules: the table of modules (dictionary) |
| 6 | 21 - path: module search path (list of strings) |
| 86 | 22 - argv: script arguments (list of strings) |
| 23 - ps1, ps2: optional primary and secondary prompts (strings) | |
| 6 | 24 */ |
| 25 | |
| 5372 | 26 #include "Python.h" |
| 86 | 27 |
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28 #include "osdefs.h" |
| 86 | 29 |
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30 #ifdef HAVE_UNISTD_H |
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31 #include <unistd.h> |
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32 #endif |
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33 |
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34 #ifdef MS_COREDLL |
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35 extern void *PyWin_DLLhModule; |
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36 /* A string loaded from the DLL at startup: */ |
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37 extern const char *PyWin_DLLVersionString; |
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38 #endif |
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39 |
| 5372 | 40 PyObject * |
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41 PySys_GetObject(char *name) |
| 6 | 42 { |
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43 PyThreadState *tstate = PyThreadState_Get(); |
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44 PyObject *sd = tstate->interp->sysdict; |
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45 if (sd == NULL) |
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46 return NULL; |
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47 return PyDict_GetItemString(sd, name); |
| 6 | 48 } |
| 49 | |
| 50 FILE * | |
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51 PySys_GetFile(char *name, FILE *def) |
| 6 | 52 { |
| 53 FILE *fp = NULL; | |
| 5372 | 54 PyObject *v = PySys_GetObject(name); |
| 55 if (v != NULL && PyFile_Check(v)) | |
| 56 fp = PyFile_AsFile(v); | |
| 6 | 57 if (fp == NULL) |
| 58 fp = def; | |
| 59 return fp; | |
| 60 } | |
| 61 | |
| 62 int | |
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63 PySys_SetObject(char *name, PyObject *v) |
| 6 | 64 { |
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65 PyThreadState *tstate = PyThreadState_Get(); |
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66 PyObject *sd = tstate->interp->sysdict; |
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67 if (v == NULL) { |
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68 if (PyDict_GetItemString(sd, name) == NULL) |
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69 return 0; |
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70 else |
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71 return PyDict_DelItemString(sd, name); |
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72 } |
| 6 | 73 else |
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74 return PyDict_SetItemString(sd, name, v); |
| 6 | 75 } |
| 76 | |
| 5372 | 77 static PyObject * |
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78 sys_exc_info(PyObject *self, PyObject *args) |
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79 { |
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80 PyThreadState *tstate; |
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81 if (!PyArg_ParseTuple(args, ":exc_info")) |
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82 return NULL; |
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83 tstate = PyThreadState_Get(); |
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84 return Py_BuildValue( |
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85 "(OOO)", |
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86 tstate->exc_type != NULL ? tstate->exc_type : Py_None, |
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87 tstate->exc_value != NULL ? tstate->exc_value : Py_None, |
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88 tstate->exc_traceback != NULL ? |
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89 tstate->exc_traceback : Py_None); |
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90 } |
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91 |
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92 static char exc_info_doc[] = |
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93 "exc_info() -> (type, value, traceback)\n\ |
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94 \n\ |
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95 Return information about the exception that is currently being handled.\n\ |
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96 This should be called from inside an except clause only."; |
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97 |
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98 static PyObject * |
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99 sys_exit(PyObject *self, PyObject *args) |
| 6 | 100 { |
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101 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 102 PyErr_SetObject(PyExc_SystemExit, args); |
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103 return NULL; |
| 6 | 104 } |
| 105 | |
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106 static char exit_doc[] = |
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107 "exit([status])\n\ |
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108 \n\ |
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109 Exit the interpreter by raising SystemExit(status).\n\ |
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110 If the status is omitted or None, it defaults to zero (i.e., success).\n\ |
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111 If the status numeric, it will be used as the system exit status.\n\ |
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112 If it is another kind of object, it will be printed and the system\n\ |
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113 exit status will be one (i.e., failure)."; |
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114 |
| 5372 | 115 static PyObject * |
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116 sys_getdefaultencoding(PyObject *self, PyObject *args) |
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117 { |
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118 if (!PyArg_ParseTuple(args, ":getdefaultencoding")) |
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119 return NULL; |
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120 return PyString_FromString(PyUnicode_GetDefaultEncoding()); |
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121 } |
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122 |
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123 static char getdefaultencoding_doc[] = |
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124 "getdefaultencoding() -> string\n\ |
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125 \n\ |
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126 Return the current default string encoding used by the Unicode \n\ |
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127 implementation."; |
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128 |
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129 static PyObject * |
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130 sys_setdefaultencoding(PyObject *self, PyObject *args) |
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131 { |
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132 char *encoding; |
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133 if (!PyArg_ParseTuple(args, "s:setdefaultencoding", &encoding)) |
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134 return NULL; |
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135 if (PyUnicode_SetDefaultEncoding(encoding)) |
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136 return NULL; |
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137 Py_INCREF(Py_None); |
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138 return Py_None; |
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139 } |
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140 |
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141 static char setdefaultencoding_doc[] = |
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142 "setdefaultencoding(encoding)\n\ |
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143 \n\ |
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144 Set the current default string encoding used by the Unicode implementation."; |
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145 |
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146 static PyObject * |
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147 sys_settrace(PyObject *self, PyObject *args) |
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148 { |
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149 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 150 if (args == Py_None) |
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151 args = NULL; |
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152 else |
| 5372 | 153 Py_XINCREF(args); |
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154 Py_XDECREF(tstate->sys_tracefunc); |
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155 tstate->sys_tracefunc = args; |
| 5372 | 156 Py_INCREF(Py_None); |
| 157 return Py_None; | |
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158 } |
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159 |
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160 static char settrace_doc[] = |
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161 "settrace(function)\n\ |
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162 \n\ |
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163 Set the global debug tracing function. It will be called on each\n\ |
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164 function call. See the debugger chapter in the library manual."; |
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165 |
| 5372 | 166 static PyObject * |
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167 sys_setprofile(PyObject *self, PyObject *args) |
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168 { |
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169 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 170 if (args == Py_None) |
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171 args = NULL; |
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172 else |
| 5372 | 173 Py_XINCREF(args); |
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174 Py_XDECREF(tstate->sys_profilefunc); |
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175 tstate->sys_profilefunc = args; |
| 5372 | 176 Py_INCREF(Py_None); |
| 177 return Py_None; | |
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178 } |
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179 |
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180 static char setprofile_doc[] = |
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181 "setprofile(function)\n\ |
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182 \n\ |
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183 Set the profiling function. It will be called on each function call\n\ |
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184 and return. See the profiler chapter in the library manual."; |
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185 |
| 5372 | 186 static PyObject * |
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187 sys_setcheckinterval(PyObject *self, PyObject *args) |
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188 { |
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189 PyThreadState *tstate = PyThreadState_Get(); |
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190 if (!PyArg_ParseTuple(args, "i:setcheckinterval", &tstate->interp->checkinterval)) |
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191 return NULL; |
| 5372 | 192 Py_INCREF(Py_None); |
| 193 return Py_None; | |
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194 } |
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195 |
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196 static char setcheckinterval_doc[] = |
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197 "setcheckinterval(n)\n\ |
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198 \n\ |
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199 Tell the Python interpreter to check for asynchronous events every\n\ |
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200 n instructions. This also affects how often thread switches occur."; |
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201 |
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202 #ifdef USE_MALLOPT |
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203 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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204 #include <malloc.h> |
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205 |
| 5372 | 206 static PyObject * |
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207 sys_mdebug(PyObject *self, PyObject *args) |
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208 { |
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209 int flag; |
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210 if (!PyArg_ParseTuple(args, "i:mdebug", &flag)) |
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211 return NULL; |
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212 mallopt(M_DEBUG, flag); |
| 5372 | 213 Py_INCREF(Py_None); |
| 214 return Py_None; | |
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215 } |
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216 #endif /* USE_MALLOPT */ |
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217 |
| 5372 | 218 static PyObject * |
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219 sys_getrefcount(PyObject *self, PyObject *args) |
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220 { |
| 5372 | 221 PyObject *arg; |
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222 if (!PyArg_ParseTuple(args, "O:getrefcount", &arg)) |
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223 return NULL; |
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224 return PyInt_FromLong(arg->ob_refcnt); |
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225 } |
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226 |
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227 #ifdef Py_TRACE_REFS |
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228 static PyObject * |
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229 sys_gettotalrefcount(PyObject *self, PyObject *args) |
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230 { |
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231 extern long _Py_RefTotal; |
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232 if (!PyArg_ParseTuple(args, ":gettotalrefcount")) |
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233 return NULL; |
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234 return PyInt_FromLong(_Py_RefTotal); |
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235 } |
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236 |
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237 #endif /* Py_TRACE_REFS */ |
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238 |
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239 static char getrefcount_doc[] = |
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240 "getrefcount(object) -> integer\n\ |
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241 \n\ |
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242 Return the current reference count for the object. This includes the\n\ |
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243 temporary reference in the argument list, so it is at least 2."; |
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244 |
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245 #ifdef COUNT_ALLOCS |
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246 static PyObject * |
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247 sys_getcounts(PyObject *self, PyObject *args) |
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248 { |
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249 extern PyObject *get_counts(void); |
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250 |
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251 if (!PyArg_ParseTuple(args, ":getcounts")) |
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252 return NULL; |
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253 return get_counts(); |
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254 } |
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255 #endif |
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256 |
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257 #ifdef Py_TRACE_REFS |
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258 /* Defined in objects.c because it uses static globals if that file */ |
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259 extern PyObject *_Py_GetObjects(PyObject *, PyObject *); |
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260 #endif |
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261 |
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262 #ifdef DYNAMIC_EXECUTION_PROFILE |
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263 /* Defined in ceval.c because it uses static globals if that file */ |
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264 extern PyObject *_Py_GetDXProfile(PyObject *, PyObject *); |
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265 #endif |
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266 |
| 5372 | 267 static PyMethodDef sys_methods[] = { |
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268 /* Might as well keep this in alphabetic order */ |
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269 {"exc_info", sys_exc_info, 1, exc_info_doc}, |
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270 {"exit", sys_exit, 0, exit_doc}, |
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271 {"getdefaultencoding", sys_getdefaultencoding, 1, getdefaultencoding_doc}, |
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272 #ifdef COUNT_ALLOCS |
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273 {"getcounts", sys_getcounts, 1}, |
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274 #endif |
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275 #ifdef DYNAMIC_EXECUTION_PROFILE |
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276 {"getdxp", _Py_GetDXProfile, 1}, |
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277 #endif |
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278 #ifdef Py_TRACE_REFS |
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279 {"getobjects", _Py_GetObjects, 1}, |
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280 {"gettotalrefcount", sys_gettotalrefcount, 1}, |
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281 #endif |
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282 {"getrefcount", sys_getrefcount, 1, getrefcount_doc}, |
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283 #ifdef USE_MALLOPT |
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284 {"mdebug", sys_mdebug, 1}, |
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285 #endif |
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286 {"setdefaultencoding", sys_setdefaultencoding, 1, setdefaultencoding_doc}, |
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287 {"setcheckinterval", sys_setcheckinterval, 1, setcheckinterval_doc}, |
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288 {"setprofile", sys_setprofile, 0, setprofile_doc}, |
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289 {"settrace", sys_settrace, 0, settrace_doc}, |
| 86 | 290 {NULL, NULL} /* sentinel */ |
| 291 }; | |
| 292 | |
| 5372 | 293 static PyObject * |
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294 list_builtin_module_names(void) |
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295 { |
| 5372 | 296 PyObject *list = PyList_New(0); |
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297 int i; |
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298 if (list == NULL) |
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299 return NULL; |
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300 for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
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301 PyObject *name = PyString_FromString( |
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302 PyImport_Inittab[i].name); |
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303 if (name == NULL) |
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304 break; |
| 5372 | 305 PyList_Append(list, name); |
| 306 Py_DECREF(name); | |
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307 } |
| 5372 | 308 if (PyList_Sort(list) != 0) { |
| 309 Py_DECREF(list); | |
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310 list = NULL; |
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311 } |
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312 if (list) { |
| 5372 | 313 PyObject *v = PyList_AsTuple(list); |
| 314 Py_DECREF(list); | |
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315 list = v; |
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316 } |
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317 return list; |
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318 } |
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319 |
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320 /* XXX This doc string is too long to be a single string literal in VC++ 5.0. |
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321 Two literals concatenated works just fine. If you have a K&R compiler |
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322 or other abomination that however *does* understand longer strings, |
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323 get rid of the !!! comment in the middle and the quotes that surround it. */ |
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324 static char sys_doc[] = |
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325 "This module provides access to some objects used or maintained by the\n\ |
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326 interpreter and to functions that interact strongly with the interpreter.\n\ |
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327 \n\ |
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328 Dynamic objects:\n\ |
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329 \n\ |
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330 argv -- command line arguments; argv[0] is the script pathname if known\n\ |
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331 path -- module search path; path[0] is the script directory, else ''\n\ |
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332 modules -- dictionary of loaded modules\n\ |
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333 exitfunc -- you may set this to a function to be called when Python exits\n\ |
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334 \n\ |
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335 stdin -- standard input file object; used by raw_input() and input()\n\ |
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336 stdout -- standard output file object; used by the print statement\n\ |
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337 stderr -- standard error object; used for error messages\n\ |
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338 By assigning another file object (or an object that behaves like a file)\n\ |
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339 to one of these, it is possible to redirect all of the interpreter's I/O.\n\ |
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340 \n\ |
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341 last_type -- type of last uncaught exception\n\ |
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342 last_value -- value of last uncaught exception\n\ |
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343 last_traceback -- traceback of last uncaught exception\n\ |
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344 These three are only available in an interactive session after a\n\ |
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345 traceback has been printed.\n\ |
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346 \n\ |
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347 exc_type -- type of exception currently being handled\n\ |
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348 exc_value -- value of exception currently being handled\n\ |
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349 exc_traceback -- traceback of exception currently being handled\n\ |
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350 The function exc_info() should be used instead of these three,\n\ |
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351 because it is thread-safe.\n\ |
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352 " |
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353 #ifndef MS_WIN16 |
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354 /* Concatenating string here */ |
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355 "\n\ |
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356 Static objects:\n\ |
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357 \n\ |
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358 maxint -- the largest supported integer (the smallest is -maxint-1)\n\ |
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359 builtin_module_names -- tuple of module names built into this intepreter\n\ |
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360 version -- the version of this interpreter as a string\n\ |
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361 version_info -- version information as a tuple\n\ |
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362 hexversion -- version information encoded as a single integer\n\ |
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363 copyright -- copyright notice pertaining to this interpreter\n\ |
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364 platform -- platform identifier\n\ |
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365 executable -- pathname of this Python interpreter\n\ |
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366 prefix -- prefix used to find the Python library\n\ |
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367 exec_prefix -- prefix used to find the machine-specific Python library\n\ |
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368 dllhandle -- [Windows only] integer handle of the Python DLL\n\ |
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369 winver -- [Windows only] version number of the Python DLL\n\ |
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370 __stdin__ -- the original stdin; don't use!\n\ |
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371 __stdout__ -- the original stdout; don't use!\n\ |
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372 __stderr__ -- the original stderr; don't use!\n\ |
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373 \n\ |
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374 Functions:\n\ |
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375 \n\ |
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376 exc_info() -- return thread-safe information about the current exception\n\ |
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377 exit() -- exit the interpreter by raising SystemExit\n\ |
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378 getrefcount() -- return the reference count for an object (plus one :-)\n\ |
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379 setcheckinterval() -- control how often the interpreter checks for events\n\ |
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380 setprofile() -- set the global profiling function\n\ |
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381 settrace() -- set the global debug tracing function\n\ |
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382 " |
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383 #endif |
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384 /* end of sys_doc */ ; |
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385 |
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386 PyObject * |
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387 _PySys_Init(void) |
| 6 | 388 { |
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389 PyObject *m, *v, *sysdict; |
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390 PyObject *sysin, *sysout, *syserr; |
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391 char *s; |
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392 |
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393 m = Py_InitModule3("sys", sys_methods, sys_doc); |
| 5372 | 394 sysdict = PyModule_GetDict(m); |
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395 |
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396 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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397 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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398 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 399 if (PyErr_Occurred()) |
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400 return NULL; |
| 5372 | 401 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 402 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 403 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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404 /* Make backup copies for cleanup */ |
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405 PyDict_SetItemString(sysdict, "__stdin__", sysin); |
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406 PyDict_SetItemString(sysdict, "__stdout__", sysout); |
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407 PyDict_SetItemString(sysdict, "__stderr__", syserr); |
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408 Py_XDECREF(sysin); |
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409 Py_XDECREF(sysout); |
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410 Py_XDECREF(syserr); |
| 5372 | 411 PyDict_SetItemString(sysdict, "version", |
| 412 v = PyString_FromString(Py_GetVersion())); | |
|
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413 Py_XDECREF(v); |
|
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414 PyDict_SetItemString(sysdict, "hexversion", |
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Add sys.hexversion, which is an integer encoding the version in hexadecimal.
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415 v = PyInt_FromLong(PY_VERSION_HEX)); |
| 5372 | 416 Py_XDECREF(v); |
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417 /* |
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418 * These release level checks are mutually exclusive and cover |
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419 * the field, so don't get too fancy with the pre-processor! |
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420 */ |
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421 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_ALPHA |
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422 s = "alpha"; |
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423 #endif |
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424 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_BETA |
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425 s = "beta"; |
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426 #endif |
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427 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_GAMMA |
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428 s = "candidate"; |
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429 #endif |
|
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430 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_FINAL |
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431 s = "final"; |
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432 #endif |
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433 PyDict_SetItemString(sysdict, "version_info", |
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434 v = Py_BuildValue("iiisi", PY_MAJOR_VERSION, |
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435 PY_MINOR_VERSION, |
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436 PY_MICRO_VERSION, s, |
|
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437 PY_RELEASE_SERIAL)); |
|
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438 Py_XDECREF(v); |
| 5372 | 439 PyDict_SetItemString(sysdict, "copyright", |
| 440 v = PyString_FromString(Py_GetCopyright())); | |
| 441 Py_XDECREF(v); | |
| 442 PyDict_SetItemString(sysdict, "platform", | |
| 443 v = PyString_FromString(Py_GetPlatform())); | |
| 444 Py_XDECREF(v); | |
|
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1f206c91daee
Set sys.executable to full path of python (from argv[0]).
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445 PyDict_SetItemString(sysdict, "executable", |
|
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446 v = PyString_FromString(Py_GetProgramFullPath())); |
|
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|
447 Py_XDECREF(v); |
| 5372 | 448 PyDict_SetItemString(sysdict, "prefix", |
| 449 v = PyString_FromString(Py_GetPrefix())); | |
| 450 Py_XDECREF(v); | |
| 451 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 452 v = PyString_FromString(Py_GetExecPrefix())); | |
| 453 Py_XDECREF(v); | |
| 454 PyDict_SetItemString(sysdict, "maxint", | |
| 455 v = PyInt_FromLong(PyInt_GetMax())); | |
| 456 Py_XDECREF(v); | |
| 457 PyDict_SetItemString(sysdict, "builtin_module_names", | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
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1848
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|
458 v = list_builtin_module_names()); |
| 5372 | 459 Py_XDECREF(v); |
|
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460 { |
|
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|
461 /* Assumes that longs are at least 2 bytes long. |
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|
462 Should be safe! */ |
|
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changeset
|
463 unsigned long number = 1; |
|
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Guido pointed out that all names in the sys module have no underscore,
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|
464 char *value; |
|
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|
465 |
|
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466 s = (char *) &number; |
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|
467 if (s[0] == 0) |
|
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|
468 value = "big"; |
|
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|
469 else |
|
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|
470 value = "little"; |
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|
471 PyDict_SetItemString(sysdict, "byteorder", |
|
14017
128f641191c3
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|
472 v = PyString_FromString(value)); |
|
128f641191c3
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|
473 Py_XDECREF(v); |
|
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|
474 } |
|
4126
c80c515999b9
Use MS_DLL_ID as sys.winver
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changeset
|
475 #ifdef MS_COREDLL |
| 5372 | 476 PyDict_SetItemString(sysdict, "dllhandle", |
|
13096
8c8de5b736dc
Trent Mick's Win64 changes: size_t vs. int or long; also some overflow
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12965
diff
changeset
|
477 v = PyLong_FromVoidPtr(PyWin_DLLhModule)); |
| 5372 | 478 Py_XDECREF(v); |
| 479 PyDict_SetItemString(sysdict, "winver", | |
|
6352
b62a7a59414e
Get DLL version from a variable.
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diff
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|
480 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 481 Py_XDECREF(v); |
|
3490
1dfc519ea3cb
Under NT, define sys.dllhandle and sys.winver (Mark H.).
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|
482 #endif |
| 5372 | 483 if (PyErr_Occurred()) |
|
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|
484 return NULL; |
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|
485 return m; |
| 86 | 486 } |
| 487 | |
| 5372 | 488 static PyObject * |
|
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|
489 makepathobject(char *path, int delim) |
| 86 | 490 { |
| 491 int i, n; | |
| 492 char *p; | |
| 5372 | 493 PyObject *v, *w; |
| 6 | 494 |
| 86 | 495 n = 1; |
| 496 p = path; | |
| 497 while ((p = strchr(p, delim)) != NULL) { | |
| 498 n++; | |
| 499 p++; | |
| 500 } | |
| 5372 | 501 v = PyList_New(n); |
| 86 | 502 if (v == NULL) |
| 503 return NULL; | |
| 504 for (i = 0; ; i++) { | |
| 505 p = strchr(path, delim); | |
| 506 if (p == NULL) | |
| 507 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 508 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 509 if (w == NULL) { |
| 5372 | 510 Py_DECREF(v); |
| 86 | 511 return NULL; |
| 512 } | |
| 5372 | 513 PyList_SetItem(v, i, w); |
| 86 | 514 if (*p == '\0') |
| 515 break; | |
| 516 path = p+1; | |
| 517 } | |
| 518 return v; | |
| 519 } | |
| 520 | |
| 521 void | |
|
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|
522 PySys_SetPath(char *path) |
| 86 | 523 { |
| 5372 | 524 PyObject *v; |
| 86 | 525 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 526 Py_FatalError("can't create sys.path"); |
| 527 if (PySys_SetObject("path", v) != 0) | |
| 528 Py_FatalError("can't assign sys.path"); | |
| 529 Py_DECREF(v); | |
|
83
f6bcf3c1d714
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|
530 } |
|
f6bcf3c1d714
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diff
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|
531 |
| 5372 | 532 static PyObject * |
|
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|
533 makeargvobject(int argc, char **argv) |
|
83
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diff
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|
534 { |
| 5372 | 535 PyObject *av; |
|
596
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
Guido van Rossum <guido@python.org>
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diff
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|
536 if (argc <= 0 || argv == NULL) { |
|
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
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diff
changeset
|
537 /* Ensure at least one (empty) argument is seen */ |
|
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
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549
diff
changeset
|
538 static char *empty_argv[1] = {""}; |
|
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
Guido van Rossum <guido@python.org>
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diff
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|
539 argv = empty_argv; |
|
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
Guido van Rossum <guido@python.org>
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diff
changeset
|
540 argc = 1; |
|
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
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parents:
549
diff
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|
541 } |
| 5372 | 542 av = PyList_New(argc); |
| 86 | 543 if (av != NULL) { |
| 544 int i; | |
| 545 for (i = 0; i < argc; i++) { | |
| 5372 | 546 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 547 if (v == NULL) { |
| 5372 | 548 Py_DECREF(av); |
| 86 | 549 av = NULL; |
| 550 break; | |
| 551 } | |
| 5372 | 552 PyList_SetItem(av, i, v); |
|
83
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
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diff
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|
553 } |
|
f6bcf3c1d714
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6
diff
changeset
|
554 } |
| 86 | 555 return av; |
| 6 | 556 } |
| 557 | |
| 558 void | |
|
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559 PySys_SetArgv(int argc, char **argv) |
| 6 | 560 { |
| 5372 | 561 PyObject *av = makeargvobject(argc, argv); |
| 562 PyObject *path = PySys_GetObject("path"); | |
| 86 | 563 if (av == NULL) |
| 5372 | 564 Py_FatalError("no mem for sys.argv"); |
| 565 if (PySys_SetObject("argv", av) != 0) | |
| 566 Py_FatalError("can't assign sys.argv"); | |
|
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567 if (path != NULL) { |
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568 char *argv0 = argv[0]; |
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569 char *p = NULL; |
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570 int n = 0; |
| 5372 | 571 PyObject *a; |
|
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572 #ifdef HAVE_READLINK |
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573 char link[MAXPATHLEN+1]; |
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574 char argv0copy[2*MAXPATHLEN+1]; |
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575 int nr = 0; |
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576 if (argc > 0 && argv0 != NULL) |
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577 nr = readlink(argv0, link, MAXPATHLEN); |
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578 if (nr > 0) { |
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579 /* It's a symlink */ |
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580 link[nr] = '\0'; |
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581 if (link[0] == SEP) |
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582 argv0 = link; /* Link to absolute path */ |
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583 else if (strchr(link, SEP) == NULL) |
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584 ; /* Link without path */ |
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585 else { |
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586 /* Must join(dirname(argv0), link) */ |
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587 char *q = strrchr(argv0, SEP); |
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588 if (q == NULL) |
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589 argv0 = link; /* argv0 without path */ |
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590 else { |
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591 /* Must make a copy */ |
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592 strcpy(argv0copy, argv0); |
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593 q = strrchr(argv0copy, SEP); |
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594 strcpy(q+1, link); |
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595 argv0 = argv0copy; |
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596 } |
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597 } |
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598 } |
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599 #endif /* HAVE_READLINK */ |
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600 #if SEP == '\\' /* Special case for MS filename syntax */ |
|
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601 if (argc > 0 && argv0 != NULL) { |
|
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602 char *q; |
|
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|
603 p = strrchr(argv0, SEP); |
|
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604 /* Test for alternate separator */ |
|
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605 q = strrchr(p ? p : argv0, '/'); |
|
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606 if (q != NULL) |
|
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|
607 p = q; |
|
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608 if (p != NULL) { |
|
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609 n = p + 1 - argv0; |
|
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610 if (n > 1 && p[-1] != ':') |
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611 n--; /* Drop trailing separator */ |
|
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612 } |
|
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613 } |
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614 #else /* All other filename syntaxes */ |
|
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615 if (argc > 0 && argv0 != NULL) |
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616 p = strrchr(argv0, SEP); |
|
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617 if (p != NULL) { |
|
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618 n = p + 1 - argv0; |
|
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619 #if SEP == '/' /* Special case for Unix filename syntax */ |
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620 if (n > 1) |
|
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621 n--; /* Drop trailing separator */ |
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622 #endif /* Unix */ |
|
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623 } |
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624 #endif /* All others */ |
| 5372 | 625 a = PyString_FromStringAndSize(argv0, n); |
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626 if (a == NULL) |
| 5372 | 627 Py_FatalError("no mem for sys.path insertion"); |
| 628 if (PyList_Insert(path, 0, a) < 0) | |
| 629 Py_FatalError("sys.path.insert(0) failed"); | |
| 630 Py_DECREF(a); | |
|
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631 } |
| 5372 | 632 Py_DECREF(av); |
| 6 | 633 } |
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634 |
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635 |
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636 /* APIs to write to sys.stdout or sys.stderr using a printf-like interface. |
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637 Adapted from code submitted by Just van Rossum. |
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638 |
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639 PySys_WriteStdout(format, ...) |
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640 PySys_WriteStderr(format, ...) |
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641 |
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642 The first function writes to sys.stdout; the second to sys.stderr. When |
|
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643 there is a problem, they write to the real (C level) stdout or stderr; |
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644 no exceptions are raised. |
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645 |
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646 Both take a printf-style format string as their first argument followed |
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647 by a variable length argument list determined by the format string. |
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648 |
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649 *** WARNING *** |
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650 |
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651 The format should limit the total size of the formatted output string to |
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652 1000 bytes. In particular, this means that no unrestricted "%s" formats |
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653 should occur; these should be limited using "%.<N>s where <N> is a |
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654 decimal number calculated so that <N> plus the maximum size of other |
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655 formatted text does not exceed 1000 bytes. Also watch out for "%f", |
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656 which can print hundreds of digits for very large numbers. |
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657 |
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658 */ |
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659 |
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660 static void |
|
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661 mywrite(char *name, FILE *fp, const char *format, va_list va) |
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662 { |
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663 PyObject *file; |
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664 PyObject *error_type, *error_value, *error_traceback; |
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665 |
|
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666 PyErr_Fetch(&error_type, &error_value, &error_traceback); |
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667 file = PySys_GetObject(name); |
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668 if (file == NULL || PyFile_AsFile(file) == fp) |
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669 vfprintf(fp, format, va); |
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670 else { |
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671 char buffer[1001]; |
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672 if (vsprintf(buffer, format, va) >= sizeof(buffer)) |
|
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673 Py_FatalError("PySys_WriteStdout/err: buffer overrun"); |
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674 if (PyFile_WriteString(buffer, file) != 0) { |
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|
675 PyErr_Clear(); |
|
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676 fputs(buffer, fp); |
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677 } |
|
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678 } |
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679 PyErr_Restore(error_type, error_value, error_traceback); |
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680 } |
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681 |
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682 void |
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683 PySys_WriteStdout(const char *format, ...) |
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684 { |
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685 va_list va; |
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686 |
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687 va_start(va, format); |
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688 mywrite("stdout", stdout, format, va); |
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689 va_end(va); |
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690 } |
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691 |
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692 void |
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693 PySys_WriteStderr(const char *format, ...) |
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694 { |
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695 va_list va; |
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696 |
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697 va_start(va, format); |
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698 mywrite("stderr", stderr, format, va); |
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699 va_end(va); |
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700 } |