Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 12970:63436719d12e legacy-trunk
Add new parser error code, E_OVERFLOW. This error is returned when
the number of children of a node exceeds the max possible value for
the short that is used to count them. The Python runtime converts
this parser error into the SyntaxError "expression too long."
| author | Jeremy Hylton <jeremy@alum.mit.edu> |
|---|---|
| date | Tue, 20 Jun 2000 19:10:44 +0000 |
| parents | 04c89d77dfdb |
| children | 8c8de5b736dc |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
|
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
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7 Permission to use, copy, modify, and distribute this software and its |
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8 documentation for any purpose and without fee is hereby granted, |
| 145 | 9 provided that the above copyright notice appear in all copies and that |
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10 both that copyright notice and this permission notice appear in |
| 145 | 11 supporting documentation, and that the names of Stichting Mathematisch |
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12 Centrum or CWI or Corporation for National Research Initiatives or |
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13 CNRI not be used in advertising or publicity pertaining to |
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14 distribution of the software without specific, written prior |
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15 permission. |
| 145 | 16 |
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17 While CWI is the initial source for this software, a modified version |
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18 is made available by the Corporation for National Research Initiatives |
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19 (CNRI) at the Internet address ftp://ftp.python.org. |
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20 |
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
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28 PERFORMANCE OF THIS SOFTWARE. |
| 145 | 29 |
| 30 ******************************************************************/ | |
| 31 | |
| 6 | 32 /* System module */ |
| 33 | |
| 34 /* | |
| 35 Various bits of information used by the interpreter are collected in | |
| 36 module 'sys'. | |
| 86 | 37 Function member: |
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38 - exit(sts): raise SystemExit |
| 6 | 39 Data members: |
| 40 - stdin, stdout, stderr: standard file objects | |
| 86 | 41 - modules: the table of modules (dictionary) |
| 6 | 42 - path: module search path (list of strings) |
| 86 | 43 - argv: script arguments (list of strings) |
| 44 - ps1, ps2: optional primary and secondary prompts (strings) | |
| 6 | 45 */ |
| 46 | |
| 5372 | 47 #include "Python.h" |
| 86 | 48 |
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49 #include "osdefs.h" |
| 86 | 50 |
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51 #ifdef HAVE_UNISTD_H |
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52 #include <unistd.h> |
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53 #endif |
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54 |
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55 #ifdef MS_COREDLL |
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56 extern void *PyWin_DLLhModule; |
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57 /* A string loaded from the DLL at startup: */ |
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58 extern const char *PyWin_DLLVersionString; |
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59 #endif |
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60 |
| 5372 | 61 PyObject * |
| 62 PySys_GetObject(name) | |
| 6 | 63 char *name; |
| 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 (sd == NULL) |
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68 return NULL; |
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69 return PyDict_GetItemString(sd, name); |
| 6 | 70 } |
| 71 | |
| 72 FILE * | |
| 5372 | 73 PySys_GetFile(name, def) |
| 6 | 74 char *name; |
| 75 FILE *def; | |
| 76 { | |
| 77 FILE *fp = NULL; | |
| 5372 | 78 PyObject *v = PySys_GetObject(name); |
| 79 if (v != NULL && PyFile_Check(v)) | |
| 80 fp = PyFile_AsFile(v); | |
| 6 | 81 if (fp == NULL) |
| 82 fp = def; | |
| 83 return fp; | |
| 84 } | |
| 85 | |
| 86 int | |
| 5372 | 87 PySys_SetObject(name, v) |
| 6 | 88 char *name; |
| 5372 | 89 PyObject *v; |
| 6 | 90 { |
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91 PyThreadState *tstate = PyThreadState_Get(); |
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92 PyObject *sd = tstate->interp->sysdict; |
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93 if (v == NULL) { |
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94 if (PyDict_GetItemString(sd, name) == NULL) |
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95 return 0; |
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96 else |
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97 return PyDict_DelItemString(sd, name); |
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98 } |
| 6 | 99 else |
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100 return PyDict_SetItemString(sd, name, v); |
| 6 | 101 } |
| 102 | |
| 5372 | 103 static PyObject * |
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104 sys_exc_info(self, args) |
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105 PyObject *self; |
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106 PyObject *args; |
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107 { |
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108 PyThreadState *tstate; |
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109 if (!PyArg_ParseTuple(args, ":exc_info")) |
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110 return NULL; |
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111 tstate = PyThreadState_Get(); |
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112 return Py_BuildValue( |
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113 "(OOO)", |
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114 tstate->exc_type != NULL ? tstate->exc_type : Py_None, |
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115 tstate->exc_value != NULL ? tstate->exc_value : Py_None, |
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116 tstate->exc_traceback != NULL ? |
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117 tstate->exc_traceback : Py_None); |
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118 } |
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119 |
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120 static char exc_info_doc[] = |
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121 "exc_info() -> (type, value, traceback)\n\ |
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122 \n\ |
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123 Return information about the exception that is currently being handled.\n\ |
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124 This should be called from inside an except clause only."; |
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125 |
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126 static PyObject * |
| 6 | 127 sys_exit(self, args) |
| 5372 | 128 PyObject *self; |
| 129 PyObject *args; | |
| 6 | 130 { |
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131 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 132 PyErr_SetObject(PyExc_SystemExit, args); |
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133 return NULL; |
| 6 | 134 } |
| 135 | |
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136 static char exit_doc[] = |
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137 "exit([status])\n\ |
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138 \n\ |
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139 Exit the interpreter by raising SystemExit(status).\n\ |
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140 If the status is omitted or None, it defaults to zero (i.e., success).\n\ |
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141 If the status numeric, it will be used as the system exit status.\n\ |
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142 If it is another kind of object, it will be printed and the system\n\ |
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143 exit status will be one (i.e., failure)."; |
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144 |
| 5372 | 145 static PyObject * |
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146 sys_getdefaultencoding(self, args) |
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147 PyObject *self; |
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148 PyObject *args; |
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149 { |
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150 if (!PyArg_ParseTuple(args, ":getdefaultencoding")) |
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151 return NULL; |
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152 return PyString_FromString(PyUnicode_GetDefaultEncoding()); |
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153 } |
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154 |
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155 static char getdefaultencoding_doc[] = |
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156 "getdefaultencoding() -> string\n\ |
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157 \n\ |
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158 Return the current default string encoding used by the Unicode \n\ |
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159 implementation."; |
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160 |
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161 static PyObject * |
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162 sys_setdefaultencoding(self, args) |
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163 PyObject *self; |
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164 PyObject *args; |
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165 { |
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166 char *encoding; |
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167 if (!PyArg_ParseTuple(args, "s:setdefaultencoding", &encoding)) |
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168 return NULL; |
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169 if (PyUnicode_SetDefaultEncoding(encoding)) |
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170 return NULL; |
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171 Py_INCREF(Py_None); |
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172 return Py_None; |
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173 } |
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174 |
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175 static char setdefaultencoding_doc[] = |
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176 "setdefaultencoding(encoding)\n\ |
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177 \n\ |
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178 Set the current default string encoding used by the Unicode implementation."; |
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179 |
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180 static PyObject * |
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181 sys_settrace(self, args) |
| 5372 | 182 PyObject *self; |
| 183 PyObject *args; | |
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184 { |
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185 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 186 if (args == Py_None) |
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187 args = NULL; |
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188 else |
| 5372 | 189 Py_XINCREF(args); |
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190 Py_XDECREF(tstate->sys_tracefunc); |
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191 tstate->sys_tracefunc = args; |
| 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 settrace_doc[] = |
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197 "settrace(function)\n\ |
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198 \n\ |
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199 Set the global debug tracing function. It will be called on each\n\ |
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200 function call. See the debugger chapter in the library manual."; |
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201 |
| 5372 | 202 static PyObject * |
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203 sys_setprofile(self, args) |
| 5372 | 204 PyObject *self; |
| 205 PyObject *args; | |
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206 { |
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207 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 208 if (args == Py_None) |
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209 args = NULL; |
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210 else |
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212 Py_XDECREF(tstate->sys_profilefunc); |
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213 tstate->sys_profilefunc = args; |
| 5372 | 214 Py_INCREF(Py_None); |
| 215 return Py_None; | |
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216 } |
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217 |
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218 static char setprofile_doc[] = |
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219 "setprofile(function)\n\ |
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220 \n\ |
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221 Set the profiling function. It will be called on each function call\n\ |
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222 and return. See the profiler chapter in the library manual."; |
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223 |
| 5372 | 224 static PyObject * |
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225 sys_setcheckinterval(self, args) |
| 5372 | 226 PyObject *self; |
| 227 PyObject *args; | |
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228 { |
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229 PyThreadState *tstate = PyThreadState_Get(); |
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230 if (!PyArg_ParseTuple(args, "i:setcheckinterval", &tstate->interp->checkinterval)) |
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231 return NULL; |
| 5372 | 232 Py_INCREF(Py_None); |
| 233 return Py_None; | |
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234 } |
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235 |
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236 static char setcheckinterval_doc[] = |
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237 "setcheckinterval(n)\n\ |
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238 \n\ |
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239 Tell the Python interpreter to check for asynchronous events every\n\ |
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240 n instructions. This also affects how often thread switches occur."; |
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241 |
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242 #ifdef USE_MALLOPT |
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243 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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244 #include <malloc.h> |
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245 |
| 5372 | 246 static PyObject * |
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247 sys_mdebug(self, args) |
| 5372 | 248 PyObject *self; |
| 249 PyObject *args; | |
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250 { |
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251 int flag; |
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252 if (!PyArg_ParseTuple(args, "i:mdebug", &flag)) |
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253 return NULL; |
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254 mallopt(M_DEBUG, flag); |
| 5372 | 255 Py_INCREF(Py_None); |
| 256 return Py_None; | |
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257 } |
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258 #endif /* USE_MALLOPT */ |
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259 |
| 5372 | 260 static PyObject * |
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261 sys_getrefcount(self, args) |
| 5372 | 262 PyObject *self; |
| 263 PyObject *args; | |
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264 { |
| 5372 | 265 PyObject *arg; |
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266 if (!PyArg_ParseTuple(args, "O:getrefcount", &arg)) |
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267 return NULL; |
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268 return PyInt_FromLong(arg->ob_refcnt); |
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269 } |
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270 |
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271 #ifdef Py_TRACE_REFS |
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272 static PyObject * |
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273 sys_gettotalrefcount(PyObject *self, PyObject *args) |
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274 { |
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275 extern long _Py_RefTotal; |
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276 if (!PyArg_ParseTuple(args, ":gettotalrefcount")) |
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277 return NULL; |
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278 return PyInt_FromLong(_Py_RefTotal); |
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279 } |
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280 |
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281 #endif /* Py_TRACE_REFS */ |
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282 |
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283 static char getrefcount_doc[] = |
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284 "getrefcount(object) -> integer\n\ |
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285 \n\ |
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286 Return the current reference count for the object. This includes the\n\ |
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287 temporary reference in the argument list, so it is at least 2."; |
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288 |
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289 #ifdef COUNT_ALLOCS |
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290 static PyObject * |
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291 sys_getcounts(self, args) |
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292 PyObject *self, *args; |
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293 { |
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294 extern PyObject *get_counts Py_PROTO((void)); |
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295 |
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296 if (!PyArg_ParseTuple(args, ":getcounts")) |
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297 return NULL; |
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298 return get_counts(); |
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299 } |
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300 #endif |
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301 |
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302 #ifdef Py_TRACE_REFS |
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303 /* Defined in objects.c because it uses static globals if that file */ |
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304 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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305 #endif |
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306 |
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307 #ifdef DYNAMIC_EXECUTION_PROFILE |
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308 /* Defined in ceval.c because it uses static globals if that file */ |
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309 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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310 #endif |
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311 |
| 5372 | 312 static PyMethodDef sys_methods[] = { |
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313 /* Might as well keep this in alphabetic order */ |
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314 {"exc_info", sys_exc_info, 1, exc_info_doc}, |
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315 {"exit", sys_exit, 0, exit_doc}, |
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316 {"getdefaultencoding", sys_getdefaultencoding, 1, getdefaultencoding_doc}, |
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317 #ifdef COUNT_ALLOCS |
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318 {"getcounts", sys_getcounts, 1}, |
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319 #endif |
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320 #ifdef DYNAMIC_EXECUTION_PROFILE |
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321 {"getdxp", _Py_GetDXProfile, 1}, |
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322 #endif |
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323 #ifdef Py_TRACE_REFS |
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324 {"getobjects", _Py_GetObjects, 1}, |
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325 {"gettotalrefcount", sys_gettotalrefcount, 1}, |
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326 #endif |
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327 {"getrefcount", sys_getrefcount, 1, getrefcount_doc}, |
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328 #ifdef USE_MALLOPT |
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329 {"mdebug", sys_mdebug, 1}, |
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330 #endif |
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331 {"setdefaultencoding", sys_setdefaultencoding, 1, setdefaultencoding_doc}, |
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332 {"setcheckinterval", sys_setcheckinterval, 1, setcheckinterval_doc}, |
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333 {"setprofile", sys_setprofile, 0, setprofile_doc}, |
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334 {"settrace", sys_settrace, 0, settrace_doc}, |
| 86 | 335 {NULL, NULL} /* sentinel */ |
| 336 }; | |
| 337 | |
| 5372 | 338 static PyObject * |
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339 list_builtin_module_names() |
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340 { |
| 5372 | 341 PyObject *list = PyList_New(0); |
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342 int i; |
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343 if (list == NULL) |
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344 return NULL; |
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345 for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
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346 PyObject *name = PyString_FromString( |
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347 PyImport_Inittab[i].name); |
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348 if (name == NULL) |
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349 break; |
| 5372 | 350 PyList_Append(list, name); |
| 351 Py_DECREF(name); | |
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352 } |
| 5372 | 353 if (PyList_Sort(list) != 0) { |
| 354 Py_DECREF(list); | |
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355 list = NULL; |
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356 } |
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357 if (list) { |
| 5372 | 358 PyObject *v = PyList_AsTuple(list); |
| 359 Py_DECREF(list); | |
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360 list = v; |
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361 } |
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362 return list; |
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363 } |
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364 |
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365 /* XXX This doc string is too long to be a single string literal in VC++ 5.0. |
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366 Two literals concatenated works just fine. If you have a K&R compiler |
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367 or other abomination that however *does* understand longer strings, |
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368 get rid of the !!! comment in the middle and the quotes that surround it. */ |
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369 static char sys_doc[] = |
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370 "This module provides access to some objects used or maintained by the\n\ |
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371 interpreter and to functions that interact strongly with the interpreter.\n\ |
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372 \n\ |
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373 Dynamic objects:\n\ |
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374 \n\ |
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375 argv -- command line arguments; argv[0] is the script pathname if known\n\ |
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376 path -- module search path; path[0] is the script directory, else ''\n\ |
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377 modules -- dictionary of loaded modules\n\ |
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378 exitfunc -- you may set this to a function to be called when Python exits\n\ |
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379 \n\ |
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380 stdin -- standard input file object; used by raw_input() and input()\n\ |
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381 stdout -- standard output file object; used by the print statement\n\ |
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382 stderr -- standard error object; used for error messages\n\ |
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383 By assigning another file object (or an object that behaves like a file)\n\ |
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384 to one of these, it is possible to redirect all of the interpreter's I/O.\n\ |
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385 \n\ |
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386 last_type -- type of last uncaught exception\n\ |
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387 last_value -- value of last uncaught exception\n\ |
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388 last_traceback -- traceback of last uncaught exception\n\ |
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389 These three are only available in an interactive session after a\n\ |
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390 traceback has been printed.\n\ |
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391 \n\ |
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392 exc_type -- type of exception currently being handled\n\ |
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393 exc_value -- value of exception currently being handled\n\ |
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394 exc_traceback -- traceback of exception currently being handled\n\ |
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395 The function exc_info() should be used instead of these three,\n\ |
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396 because it is thread-safe.\n\ |
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397 " |
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398 #ifndef MS_WIN16 |
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399 /* Concatenating string here */ |
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400 "\n\ |
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401 Static objects:\n\ |
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402 \n\ |
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403 maxint -- the largest supported integer (the smallest is -maxint-1)\n\ |
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404 builtin_module_names -- tuple of module names built into this intepreter\n\ |
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405 version -- the version of this interpreter as a string\n\ |
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406 version_info -- version information as a tuple\n\ |
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407 hexversion -- version information encoded as a single integer\n\ |
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408 copyright -- copyright notice pertaining to this interpreter\n\ |
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409 platform -- platform identifier\n\ |
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410 executable -- pathname of this Python interpreter\n\ |
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411 prefix -- prefix used to find the Python library\n\ |
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412 exec_prefix -- prefix used to find the machine-specific Python library\n\ |
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413 dllhandle -- [Windows only] integer handle of the Python DLL\n\ |
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414 winver -- [Windows only] version number of the Python DLL\n\ |
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415 __stdin__ -- the original stdin; don't use!\n\ |
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416 __stdout__ -- the original stdout; don't use!\n\ |
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417 __stderr__ -- the original stderr; don't use!\n\ |
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418 \n\ |
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419 Functions:\n\ |
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420 \n\ |
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421 exc_info() -- return thread-safe information about the current exception\n\ |
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422 exit() -- exit the interpreter by raising SystemExit\n\ |
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423 getrefcount() -- return the reference count for an object (plus one :-)\n\ |
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424 setcheckinterval() -- control how often the interpreter checks for events\n\ |
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425 setprofile() -- set the global profiling function\n\ |
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426 settrace() -- set the global debug tracing function\n\ |
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427 "; |
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428 #endif |
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429 |
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430 PyObject * |
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431 _PySys_Init() |
| 6 | 432 { |
| 5372 | 433 extern int fclose Py_PROTO((FILE *)); |
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434 PyObject *m, *v, *sysdict; |
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435 PyObject *sysin, *sysout, *syserr; |
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436 char *s; |
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437 |
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438 m = Py_InitModule3("sys", sys_methods, sys_doc); |
| 5372 | 439 sysdict = PyModule_GetDict(m); |
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440 |
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441 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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442 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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443 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 444 if (PyErr_Occurred()) |
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445 return NULL; |
| 5372 | 446 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 447 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 448 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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449 /* Make backup copies for cleanup */ |
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450 PyDict_SetItemString(sysdict, "__stdin__", sysin); |
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451 PyDict_SetItemString(sysdict, "__stdout__", sysout); |
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452 PyDict_SetItemString(sysdict, "__stderr__", syserr); |
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453 Py_XDECREF(sysin); |
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454 Py_XDECREF(sysout); |
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455 Py_XDECREF(syserr); |
| 5372 | 456 PyDict_SetItemString(sysdict, "version", |
| 457 v = PyString_FromString(Py_GetVersion())); | |
|
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458 Py_XDECREF(v); |
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459 PyDict_SetItemString(sysdict, "hexversion", |
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460 v = PyInt_FromLong(PY_VERSION_HEX)); |
| 5372 | 461 Py_XDECREF(v); |
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462 /* |
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463 * These release level checks are mutually exclusive and cover |
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464 * the field, so don't get too fancy with the pre-processor! |
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465 */ |
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466 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_ALPHA |
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467 s = "alpha"; |
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468 #endif |
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469 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_BETA |
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470 s = "beta"; |
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471 #endif |
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472 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_GAMMA |
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473 s = "candidate"; |
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474 #endif |
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475 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_FINAL |
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476 s = "final"; |
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477 #endif |
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478 PyDict_SetItemString(sysdict, "version_info", |
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479 v = Py_BuildValue("iiisi", PY_MAJOR_VERSION, |
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|
480 PY_MINOR_VERSION, |
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481 PY_MICRO_VERSION, s, |
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482 PY_RELEASE_SERIAL)); |
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483 Py_XDECREF(v); |
| 5372 | 484 PyDict_SetItemString(sysdict, "copyright", |
| 485 v = PyString_FromString(Py_GetCopyright())); | |
| 486 Py_XDECREF(v); | |
| 487 PyDict_SetItemString(sysdict, "platform", | |
| 488 v = PyString_FromString(Py_GetPlatform())); | |
| 489 Py_XDECREF(v); | |
|
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Set sys.executable to full path of python (from argv[0]).
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490 PyDict_SetItemString(sysdict, "executable", |
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Set sys.executable to full path of python (from argv[0]).
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491 v = PyString_FromString(Py_GetProgramFullPath())); |
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492 Py_XDECREF(v); |
| 5372 | 493 PyDict_SetItemString(sysdict, "prefix", |
| 494 v = PyString_FromString(Py_GetPrefix())); | |
| 495 Py_XDECREF(v); | |
| 496 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 497 v = PyString_FromString(Py_GetExecPrefix())); | |
| 498 Py_XDECREF(v); | |
| 499 PyDict_SetItemString(sysdict, "maxint", | |
| 500 v = PyInt_FromLong(PyInt_GetMax())); | |
| 501 Py_XDECREF(v); | |
| 502 PyDict_SetItemString(sysdict, "builtin_module_names", | |
|
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Lots of changes, most minor (fatal() instead of abort(), use of
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|
503 v = list_builtin_module_names()); |
| 5372 | 504 Py_XDECREF(v); |
|
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|
505 #ifdef MS_COREDLL |
| 5372 | 506 PyDict_SetItemString(sysdict, "dllhandle", |
| 507 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 508 Py_XDECREF(v); | |
| 509 PyDict_SetItemString(sysdict, "winver", | |
|
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Get DLL version from a variable.
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510 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 511 Py_XDECREF(v); |
|
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512 #endif |
| 5372 | 513 if (PyErr_Occurred()) |
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514 return NULL; |
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515 return m; |
| 86 | 516 } |
| 517 | |
| 5372 | 518 static PyObject * |
| 86 | 519 makepathobject(path, delim) |
| 520 char *path; | |
| 521 int delim; | |
| 522 { | |
| 523 int i, n; | |
| 524 char *p; | |
| 5372 | 525 PyObject *v, *w; |
| 6 | 526 |
| 86 | 527 n = 1; |
| 528 p = path; | |
| 529 while ((p = strchr(p, delim)) != NULL) { | |
| 530 n++; | |
| 531 p++; | |
| 532 } | |
| 5372 | 533 v = PyList_New(n); |
| 86 | 534 if (v == NULL) |
| 535 return NULL; | |
| 536 for (i = 0; ; i++) { | |
| 537 p = strchr(path, delim); | |
| 538 if (p == NULL) | |
| 539 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 540 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 541 if (w == NULL) { |
| 5372 | 542 Py_DECREF(v); |
| 86 | 543 return NULL; |
| 544 } | |
| 5372 | 545 PyList_SetItem(v, i, w); |
| 86 | 546 if (*p == '\0') |
| 547 break; | |
| 548 path = p+1; | |
| 549 } | |
| 550 return v; | |
| 551 } | |
| 552 | |
| 553 void | |
| 5372 | 554 PySys_SetPath(path) |
| 86 | 555 char *path; |
| 556 { | |
| 5372 | 557 PyObject *v; |
| 86 | 558 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 559 Py_FatalError("can't create sys.path"); |
| 560 if (PySys_SetObject("path", v) != 0) | |
| 561 Py_FatalError("can't assign sys.path"); | |
| 562 Py_DECREF(v); | |
|
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563 } |
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564 |
| 5372 | 565 static PyObject * |
| 86 | 566 makeargvobject(argc, argv) |
| 567 int argc; | |
| 568 char **argv; | |
|
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569 { |
| 5372 | 570 PyObject *av; |
|
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|
571 if (argc <= 0 || argv == NULL) { |
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|
572 /* Ensure at least one (empty) argument is seen */ |
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|
573 static char *empty_argv[1] = {""}; |
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|
574 argv = empty_argv; |
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|
575 argc = 1; |
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576 } |
| 5372 | 577 av = PyList_New(argc); |
| 86 | 578 if (av != NULL) { |
| 579 int i; | |
| 580 for (i = 0; i < argc; i++) { | |
| 5372 | 581 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 582 if (v == NULL) { |
| 5372 | 583 Py_DECREF(av); |
| 86 | 584 av = NULL; |
| 585 break; | |
| 586 } | |
| 5372 | 587 PyList_SetItem(av, i, v); |
|
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588 } |
|
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589 } |
| 86 | 590 return av; |
| 6 | 591 } |
| 592 | |
| 593 void | |
| 5372 | 594 PySys_SetArgv(argc, argv) |
| 86 | 595 int argc; |
| 596 char **argv; | |
| 6 | 597 { |
| 5372 | 598 PyObject *av = makeargvobject(argc, argv); |
| 599 PyObject *path = PySys_GetObject("path"); | |
| 86 | 600 if (av == NULL) |
| 5372 | 601 Py_FatalError("no mem for sys.argv"); |
| 602 if (PySys_SetObject("argv", av) != 0) | |
| 603 Py_FatalError("can't assign sys.argv"); | |
|
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604 if (path != NULL) { |
|
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605 char *argv0 = argv[0]; |
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606 char *p = NULL; |
|
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607 int n = 0; |
| 5372 | 608 PyObject *a; |
|
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609 #ifdef HAVE_READLINK |
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|
610 char link[MAXPATHLEN+1]; |
|
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|
611 char argv0copy[2*MAXPATHLEN+1]; |
|
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|
612 int nr = 0; |
|
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|
613 if (argc > 0 && argv0 != NULL) |
|
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614 nr = readlink(argv0, link, MAXPATHLEN); |
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|
615 if (nr > 0) { |
|
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616 /* It's a symlink */ |
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617 link[nr] = '\0'; |
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|
618 if (link[0] == SEP) |
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|
619 argv0 = link; /* Link to absolute path */ |
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|
620 else if (strchr(link, SEP) == NULL) |
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|
621 ; /* Link without path */ |
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622 else { |
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|
623 /* Must join(dirname(argv0), link) */ |
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624 char *q = strrchr(argv0, SEP); |
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625 if (q == NULL) |
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626 argv0 = link; /* argv0 without path */ |
|
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627 else { |
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628 /* Must make a copy */ |
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|
629 strcpy(argv0copy, argv0); |
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|
630 q = strrchr(argv0copy, SEP); |
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|
631 strcpy(q+1, link); |
|
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|
632 argv0 = argv0copy; |
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633 } |
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634 } |
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635 } |
|
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636 #endif /* HAVE_READLINK */ |
|
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637 #if SEP == '\\' /* Special case for MS filename syntax */ |
|
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638 if (argc > 0 && argv0 != NULL) { |
|
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639 char *q; |
|
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|
640 p = strrchr(argv0, SEP); |
|
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641 /* Test for alternate separator */ |
|
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|
642 q = strrchr(p ? p : argv0, '/'); |
|
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|
643 if (q != NULL) |
|
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|
644 p = q; |
|
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|
645 if (p != NULL) { |
|
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|
646 n = p + 1 - argv0; |
|
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|
647 if (n > 1 && p[-1] != ':') |
|
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|
648 n--; /* Drop trailing separator */ |
|
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|
649 } |
|
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650 } |
|
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|
651 #else /* All other filename syntaxes */ |
|
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652 if (argc > 0 && argv0 != NULL) |
|
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|
653 p = strrchr(argv0, SEP); |
|
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|
654 if (p != NULL) { |
|
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|
655 n = p + 1 - argv0; |
|
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656 #if SEP == '/' /* Special case for Unix filename syntax */ |
|
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|
657 if (n > 1) |
|
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|
658 n--; /* Drop trailing separator */ |
|
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|
659 #endif /* Unix */ |
|
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|
660 } |
|
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|
661 #endif /* All others */ |
| 5372 | 662 a = PyString_FromStringAndSize(argv0, n); |
|
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663 if (a == NULL) |
| 5372 | 664 Py_FatalError("no mem for sys.path insertion"); |
| 665 if (PyList_Insert(path, 0, a) < 0) | |
| 666 Py_FatalError("sys.path.insert(0) failed"); | |
| 667 Py_DECREF(a); | |
|
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As a side effect of calling PySys_SetArgv (setpythonargv), the
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|
668 } |
| 5372 | 669 Py_DECREF(av); |
| 6 | 670 } |
|
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|
671 |
|
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|
672 |
|
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|
673 /* APIs to write to sys.stdout or sys.stderr using a printf-like interface. |
|
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|
674 Adapted from code submitted by Just van Rossum. |
|
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|
675 |
|
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|
676 PySys_WriteStdout(format, ...) |
|
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|
677 PySys_WriteStderr(format, ...) |
|
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|
678 |
|
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|
679 The first function writes to sys.stdout; the second to sys.stderr. When |
|
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|
680 there is a problem, they write to the real (C level) stdout or stderr; |
|
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|
681 no exceptions are raised. |
|
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|
682 |
|
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|
683 Both take a printf-style format string as their first argument followed |
|
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|
684 by a variable length argument list determined by the format string. |
|
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|
685 |
|
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|
686 *** WARNING *** |
|
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|
687 |
|
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|
688 The format should limit the total size of the formatted output string to |
|
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|
689 1000 bytes. In particular, this means that no unrestricted "%s" formats |
|
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690 should occur; these should be limited using "%.<N>s where <N> is a |
|
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|
691 decimal number calculated so that <N> plus the maximum size of other |
|
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|
692 formatted text does not exceed 1000 bytes. Also watch out for "%f", |
|
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|
693 which can print hundreds of digits for very large numbers. |
|
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|
694 |
|
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695 */ |
|
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|
696 |
|
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|
697 static void |
|
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|
698 mywrite(name, fp, format, va) |
|
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|
699 char *name; |
|
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700 FILE *fp; |
|
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|
701 const char *format; |
|
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|
702 va_list va; |
|
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703 { |
|
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|
704 PyObject *file; |
|
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|
705 PyObject *error_type, *error_value, *error_traceback; |
|
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|
706 |
|
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|
707 PyErr_Fetch(&error_type, &error_value, &error_traceback); |
|
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|
708 file = PySys_GetObject(name); |
|
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|
709 if (file == NULL || PyFile_AsFile(file) == fp) |
|
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|
710 vfprintf(fp, format, va); |
|
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|
711 else { |
|
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|
712 char buffer[1001]; |
|
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|
713 if (vsprintf(buffer, format, va) >= sizeof(buffer)) |
|
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714 Py_FatalError("PySys_WriteStdout/err: buffer overrun"); |
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715 if (PyFile_WriteString(buffer, file) != 0) { |
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716 PyErr_Clear(); |
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717 fputs(buffer, fp); |
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718 } |
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719 } |
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720 PyErr_Restore(error_type, error_value, error_traceback); |
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721 } |
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722 |
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723 void |
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724 #ifdef HAVE_STDARG_PROTOTYPES |
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725 PySys_WriteStdout(const char *format, ...) |
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726 #else |
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727 PySys_WriteStdout(va_alist) |
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728 va_dcl |
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729 #endif |
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730 { |
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731 va_list va; |
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732 |
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733 #ifdef HAVE_STDARG_PROTOTYPES |
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734 va_start(va, format); |
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735 #else |
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736 char *format; |
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737 va_start(va); |
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738 format = va_arg(va, char *); |
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739 #endif |
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740 mywrite("stdout", stdout, format, va); |
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741 va_end(va); |
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742 } |
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743 |
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744 void |
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745 #ifdef HAVE_STDARG_PROTOTYPES |
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746 PySys_WriteStderr(const char *format, ...) |
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747 #else |
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748 PySys_WriteStderr(va_alist) |
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749 va_dcl |
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750 #endif |
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751 { |
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752 va_list va; |
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753 |
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754 #ifdef HAVE_STDARG_PROTOTYPES |
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755 va_start(va, format); |
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756 #else |
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757 char *format; |
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758 va_start(va); |
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759 format = va_arg(va, char *); |
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760 #endif |
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761 mywrite("stderr", stderr, format, va); |
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762 va_end(va); |
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763 } |