Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 12584:cde4da18c4fa legacy-trunk
Fast NonRecursiveMutex support by Yakov Markovitch, markovitch@iso.ru,
who wrote:
Here's the new version of thread_nt.h. More particular, there is a
new version of thread lock that uses kernel object (e.g. semaphore)
only in case of contention; in other case it simply uses interlocked
functions, which are faster by the order of magnitude. It doesn't
make much difference without threads present, but as soon as thread
machinery initialised and (mostly) the interpreter global lock is on,
difference becomes tremendous. I've included a small script, which
initialises threads and launches pystone. With original thread_nt.h,
Pystone results with initialised threads are twofold worse then w/o
threads. With the new version, only 10% worse. I have used this
patch for about 6 months (with threaded and non-threaded
applications). It works remarkably well (though I'd desperately
prefer Python was free-threaded; I hope, it will soon).
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 04 May 2000 18:47:15 +0000 |
| parents | 2392d10e21f1 |
| children | c92668766f5d |
| 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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Get DLL version from a variable.
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57 /* A string loaded from the DLL at startup: */ |
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Get DLL version from a variable.
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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_settrace(self, args) |
| 5372 | 147 PyObject *self; |
| 148 PyObject *args; | |
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149 { |
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150 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 151 if (args == Py_None) |
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152 args = NULL; |
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153 else |
| 5372 | 154 Py_XINCREF(args); |
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155 Py_XDECREF(tstate->sys_tracefunc); |
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156 tstate->sys_tracefunc = args; |
| 5372 | 157 Py_INCREF(Py_None); |
| 158 return Py_None; | |
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159 } |
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160 |
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161 static char settrace_doc[] = |
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162 "settrace(function)\n\ |
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163 \n\ |
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164 Set the global debug tracing function. It will be called on each\n\ |
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165 function call. See the debugger chapter in the library manual."; |
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166 |
| 5372 | 167 static PyObject * |
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168 sys_setprofile(self, args) |
| 5372 | 169 PyObject *self; |
| 170 PyObject *args; | |
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171 { |
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172 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 173 if (args == Py_None) |
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174 args = NULL; |
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175 else |
| 5372 | 176 Py_XINCREF(args); |
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177 Py_XDECREF(tstate->sys_profilefunc); |
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178 tstate->sys_profilefunc = args; |
| 5372 | 179 Py_INCREF(Py_None); |
| 180 return Py_None; | |
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181 } |
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182 |
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183 static char setprofile_doc[] = |
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184 "setprofile(function)\n\ |
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185 \n\ |
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186 Set the profiling function. It will be called on each function call\n\ |
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187 and return. See the profiler chapter in the library manual."; |
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188 |
| 5372 | 189 static PyObject * |
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190 sys_setcheckinterval(self, args) |
| 5372 | 191 PyObject *self; |
| 192 PyObject *args; | |
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193 { |
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194 PyThreadState *tstate = PyThreadState_Get(); |
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195 if (!PyArg_ParseTuple(args, "i:setcheckinterval", &tstate->interp->checkinterval)) |
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196 return NULL; |
| 5372 | 197 Py_INCREF(Py_None); |
| 198 return Py_None; | |
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199 } |
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200 |
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201 static char setcheckinterval_doc[] = |
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202 "setcheckinterval(n)\n\ |
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203 \n\ |
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204 Tell the Python interpreter to check for asynchronous events every\n\ |
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205 n instructions. This also affects how often thread switches occur."; |
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206 |
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207 #ifdef USE_MALLOPT |
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208 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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209 #include <malloc.h> |
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210 |
| 5372 | 211 static PyObject * |
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212 sys_mdebug(self, args) |
| 5372 | 213 PyObject *self; |
| 214 PyObject *args; | |
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215 { |
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216 int flag; |
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217 if (!PyArg_ParseTuple(args, "i:mdebug", &flag)) |
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218 return NULL; |
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219 mallopt(M_DEBUG, flag); |
| 5372 | 220 Py_INCREF(Py_None); |
| 221 return Py_None; | |
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222 } |
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223 #endif /* USE_MALLOPT */ |
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224 |
| 5372 | 225 static PyObject * |
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226 sys_getrefcount(self, args) |
| 5372 | 227 PyObject *self; |
| 228 PyObject *args; | |
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229 { |
| 5372 | 230 PyObject *arg; |
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231 if (!PyArg_ParseTuple(args, "O:getrefcount", &arg)) |
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232 return NULL; |
| 5372 | 233 return PyInt_FromLong((long) arg->ob_refcnt); |
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234 } |
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235 |
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236 static char getrefcount_doc[] = |
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237 "getrefcount(object) -> integer\n\ |
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238 \n\ |
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239 Return the current reference count for the object. This includes the\n\ |
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240 temporary reference in the argument list, so it is at least 2."; |
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241 |
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242 #ifdef COUNT_ALLOCS |
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243 static PyObject * |
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244 sys_getcounts(self, args) |
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245 PyObject *self, *args; |
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246 { |
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247 extern PyObject *get_counts Py_PROTO((void)); |
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248 |
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249 if (!PyArg_ParseTuple(args, ":getcounts")) |
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250 return NULL; |
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251 return get_counts(); |
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252 } |
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253 #endif |
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254 |
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255 #ifdef Py_TRACE_REFS |
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256 /* Defined in objects.c because it uses static globals if that file */ |
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257 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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258 #endif |
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259 |
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260 #ifdef DYNAMIC_EXECUTION_PROFILE |
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261 /* Defined in ceval.c because it uses static globals if that file */ |
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262 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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263 #endif |
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264 |
| 5372 | 265 static PyMethodDef sys_methods[] = { |
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266 /* Might as well keep this in alphabetic order */ |
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267 {"exc_info", sys_exc_info, 1, exc_info_doc}, |
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268 {"exit", sys_exit, 0, exit_doc}, |
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269 #ifdef COUNT_ALLOCS |
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270 {"getcounts", sys_getcounts, 1}, |
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271 #endif |
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272 #ifdef DYNAMIC_EXECUTION_PROFILE |
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273 {"getdxp", _Py_GetDXProfile, 1}, |
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274 #endif |
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275 #ifdef Py_TRACE_REFS |
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276 {"getobjects", _Py_GetObjects, 1}, |
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277 #endif |
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278 {"getrefcount", sys_getrefcount, 1, getrefcount_doc}, |
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279 #ifdef USE_MALLOPT |
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280 {"mdebug", sys_mdebug, 1}, |
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281 #endif |
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282 {"setcheckinterval", sys_setcheckinterval, 1, setcheckinterval_doc}, |
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283 {"setprofile", sys_setprofile, 0, setprofile_doc}, |
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284 {"settrace", sys_settrace, 0, settrace_doc}, |
| 86 | 285 {NULL, NULL} /* sentinel */ |
| 286 }; | |
| 287 | |
| 5372 | 288 static PyObject * |
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289 list_builtin_module_names() |
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290 { |
| 5372 | 291 PyObject *list = PyList_New(0); |
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292 int i; |
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293 if (list == NULL) |
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294 return NULL; |
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295 for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
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296 PyObject *name = PyString_FromString( |
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297 PyImport_Inittab[i].name); |
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298 if (name == NULL) |
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299 break; |
| 5372 | 300 PyList_Append(list, name); |
| 301 Py_DECREF(name); | |
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302 } |
| 5372 | 303 if (PyList_Sort(list) != 0) { |
| 304 Py_DECREF(list); | |
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305 list = NULL; |
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306 } |
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307 if (list) { |
| 5372 | 308 PyObject *v = PyList_AsTuple(list); |
| 309 Py_DECREF(list); | |
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310 list = v; |
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311 } |
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312 return list; |
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313 } |
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314 |
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315 /* XXX This doc string is too long to be a single string literal in VC++ 5.0. |
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316 Two literals concatenated works just fine. If you have a K&R compiler |
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317 or other abomination that however *does* understand longer strings, |
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318 get rid of the !!! comment in the middle and the quotes that surround it. */ |
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319 static char sys_doc[] = |
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320 "This module provides access to some objects used or maintained by the\n\ |
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321 interpreter and to functions that interact strongly with the interpreter.\n\ |
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322 \n\ |
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323 Dynamic objects:\n\ |
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324 \n\ |
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325 argv -- command line arguments; argv[0] is the script pathname if known\n\ |
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326 path -- module search path; path[0] is the script directory, else ''\n\ |
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327 modules -- dictionary of loaded modules\n\ |
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328 exitfunc -- you may set this to a function to be called when Python exits\n\ |
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329 \n\ |
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330 stdin -- standard input file object; used by raw_input() and input()\n\ |
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331 stdout -- standard output file object; used by the print statement\n\ |
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332 stderr -- standard error object; used for error messages\n\ |
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333 By assigning another file object (or an object that behaves like a file)\n\ |
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334 to one of these, it is possible to redirect all of the interpreter's I/O.\n\ |
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335 \n\ |
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336 last_type -- type of last uncaught exception\n\ |
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337 last_value -- value of last uncaught exception\n\ |
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338 last_traceback -- traceback of last uncaught exception\n\ |
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339 These three are only available in an interactive session after a\n\ |
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340 traceback has been printed.\n\ |
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341 \n\ |
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342 exc_type -- type of exception currently being handled\n\ |
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343 exc_value -- value of exception currently being handled\n\ |
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344 exc_traceback -- traceback of exception currently being handled\n\ |
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345 The function exc_info() should be used instead of these three,\n\ |
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346 because it is thread-safe.\n\ |
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347 " |
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348 #ifndef MS_WIN16 |
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349 /* Concatenating string here */ |
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350 "\n\ |
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351 Static objects:\n\ |
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352 \n\ |
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353 maxint -- the largest supported integer (the smallest is -maxint-1)\n\ |
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354 builtin_module_names -- tuple of module names built into this intepreter\n\ |
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355 version -- the version of this interpreter as a string\n\ |
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356 version_info -- version information as a tuple\n\ |
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357 hexversion -- version information encoded as a single integer\n\ |
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358 copyright -- copyright notice pertaining to this interpreter\n\ |
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359 platform -- platform identifier\n\ |
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360 executable -- pathname of this Python interpreter\n\ |
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361 prefix -- prefix used to find the Python library\n\ |
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362 exec_prefix -- prefix used to find the machine-specific Python library\n\ |
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363 dllhandle -- [Windows only] integer handle of the Python DLL\n\ |
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364 winver -- [Windows only] version number of the Python DLL\n\ |
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365 __stdin__ -- the original stdin; don't use!\n\ |
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366 __stdout__ -- the original stdout; don't use!\n\ |
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367 __stderr__ -- the original stderr; don't use!\n\ |
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368 \n\ |
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369 Functions:\n\ |
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370 \n\ |
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371 exc_info() -- return thread-safe information about the current exception\n\ |
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372 exit() -- exit the interpreter by raising SystemExit\n\ |
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373 getrefcount() -- return the reference count for an object (plus one :-)\n\ |
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374 setcheckinterval() -- control how often the interpreter checks for events\n\ |
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375 setprofile() -- set the global profiling function\n\ |
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376 settrace() -- set the global debug tracing function\n\ |
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377 "; |
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378 #endif |
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379 |
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380 PyObject * |
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381 _PySys_Init() |
| 6 | 382 { |
| 5372 | 383 extern int fclose Py_PROTO((FILE *)); |
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384 PyObject *m, *v, *sysdict; |
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385 PyObject *sysin, *sysout, *syserr; |
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386 char *s; |
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387 |
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388 m = Py_InitModule3("sys", sys_methods, sys_doc); |
| 5372 | 389 sysdict = PyModule_GetDict(m); |
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390 |
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391 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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392 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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393 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 394 if (PyErr_Occurred()) |
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395 return NULL; |
| 5372 | 396 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 397 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 398 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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399 /* Make backup copies for cleanup */ |
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400 PyDict_SetItemString(sysdict, "__stdin__", sysin); |
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401 PyDict_SetItemString(sysdict, "__stdout__", sysout); |
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402 PyDict_SetItemString(sysdict, "__stderr__", syserr); |
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403 Py_XDECREF(sysin); |
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404 Py_XDECREF(sysout); |
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405 Py_XDECREF(syserr); |
| 5372 | 406 PyDict_SetItemString(sysdict, "version", |
| 407 v = PyString_FromString(Py_GetVersion())); | |
|
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408 Py_XDECREF(v); |
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409 PyDict_SetItemString(sysdict, "hexversion", |
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410 v = PyInt_FromLong(PY_VERSION_HEX)); |
| 5372 | 411 Py_XDECREF(v); |
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412 /* |
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|
413 * These release level checks are mutually exclusive and cover |
|
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Capitulate, changing version_info to a 5-tuple:
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|
414 * the field, so don't get too fancy with the pre-processor! |
|
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Capitulate, changing version_info to a 5-tuple:
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parents:
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diff
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|
415 */ |
|
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Capitulate, changing version_info to a 5-tuple:
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|
416 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_ALPHA |
|
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417 s = "alpha"; |
|
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418 #endif |
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Capitulate, changing version_info to a 5-tuple:
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419 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_BETA |
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420 s = "beta"; |
|
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421 #endif |
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Capitulate, changing version_info to a 5-tuple:
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|
422 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_GAMMA |
|
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Simplify creation of the version_info value for clarity, per
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|
423 s = "candidate"; |
|
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Capitulate, changing version_info to a 5-tuple:
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diff
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|
424 #endif |
|
12394
60dd95c75999
Define version_info to be a tuple (major, minor, micro, level); level
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|
425 #if PY_RELEASE_LEVEL == PY_RELEASE_LEVEL_FINAL |
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426 s = "final"; |
|
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Capitulate, changing version_info to a 5-tuple:
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|
427 #endif |
|
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diff
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|
428 PyDict_SetItemString(sysdict, "version_info", |
|
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Simplify creation of the version_info value for clarity, per
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|
429 v = Py_BuildValue("iiisi", PY_MAJOR_VERSION, |
|
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|
430 PY_MINOR_VERSION, |
|
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|
431 PY_MICRO_VERSION, s, |
|
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|
432 PY_RELEASE_SERIAL)); |
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|
433 Py_XDECREF(v); |
| 5372 | 434 PyDict_SetItemString(sysdict, "copyright", |
| 435 v = PyString_FromString(Py_GetCopyright())); | |
| 436 Py_XDECREF(v); | |
| 437 PyDict_SetItemString(sysdict, "platform", | |
| 438 v = PyString_FromString(Py_GetPlatform())); | |
| 439 Py_XDECREF(v); | |
|
5598
1f206c91daee
Set sys.executable to full path of python (from argv[0]).
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|
440 PyDict_SetItemString(sysdict, "executable", |
|
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Set sys.executable to full path of python (from argv[0]).
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441 v = PyString_FromString(Py_GetProgramFullPath())); |
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Set sys.executable to full path of python (from argv[0]).
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|
442 Py_XDECREF(v); |
| 5372 | 443 PyDict_SetItemString(sysdict, "prefix", |
| 444 v = PyString_FromString(Py_GetPrefix())); | |
| 445 Py_XDECREF(v); | |
| 446 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 447 v = PyString_FromString(Py_GetExecPrefix())); | |
| 448 Py_XDECREF(v); | |
| 449 PyDict_SetItemString(sysdict, "maxint", | |
| 450 v = PyInt_FromLong(PyInt_GetMax())); | |
| 451 Py_XDECREF(v); | |
| 452 PyDict_SetItemString(sysdict, "builtin_module_names", | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
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|
453 v = list_builtin_module_names()); |
| 5372 | 454 Py_XDECREF(v); |
|
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c80c515999b9
Use MS_DLL_ID as sys.winver
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|
455 #ifdef MS_COREDLL |
| 5372 | 456 PyDict_SetItemString(sysdict, "dllhandle", |
| 457 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 458 Py_XDECREF(v); | |
| 459 PyDict_SetItemString(sysdict, "winver", | |
|
6352
b62a7a59414e
Get DLL version from a variable.
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460 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 461 Py_XDECREF(v); |
|
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1dfc519ea3cb
Under NT, define sys.dllhandle and sys.winver (Mark H.).
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|
462 #endif |
| 5372 | 463 if (PyErr_Occurred()) |
|
5926
8d2194e22e67
The last of the mass checkins for separate (sub)interpreters.
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464 return NULL; |
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The last of the mass checkins for separate (sub)interpreters.
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|
465 return m; |
| 86 | 466 } |
| 467 | |
| 5372 | 468 static PyObject * |
| 86 | 469 makepathobject(path, delim) |
| 470 char *path; | |
| 471 int delim; | |
| 472 { | |
| 473 int i, n; | |
| 474 char *p; | |
| 5372 | 475 PyObject *v, *w; |
| 6 | 476 |
| 86 | 477 n = 1; |
| 478 p = path; | |
| 479 while ((p = strchr(p, delim)) != NULL) { | |
| 480 n++; | |
| 481 p++; | |
| 482 } | |
| 5372 | 483 v = PyList_New(n); |
| 86 | 484 if (v == NULL) |
| 485 return NULL; | |
| 486 for (i = 0; ; i++) { | |
| 487 p = strchr(path, delim); | |
| 488 if (p == NULL) | |
| 489 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 490 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 491 if (w == NULL) { |
| 5372 | 492 Py_DECREF(v); |
| 86 | 493 return NULL; |
| 494 } | |
| 5372 | 495 PyList_SetItem(v, i, w); |
| 86 | 496 if (*p == '\0') |
| 497 break; | |
| 498 path = p+1; | |
| 499 } | |
| 500 return v; | |
| 501 } | |
| 502 | |
| 503 void | |
| 5372 | 504 PySys_SetPath(path) |
| 86 | 505 char *path; |
| 506 { | |
| 5372 | 507 PyObject *v; |
| 86 | 508 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 509 Py_FatalError("can't create sys.path"); |
| 510 if (PySys_SetObject("path", v) != 0) | |
| 511 Py_FatalError("can't assign sys.path"); | |
| 512 Py_DECREF(v); | |
|
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513 } |
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|
514 |
| 5372 | 515 static PyObject * |
| 86 | 516 makeargvobject(argc, argv) |
| 517 int argc; | |
| 518 char **argv; | |
|
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|
519 { |
| 5372 | 520 PyObject *av; |
|
596
e18f1fa398a3
Ensure that sys.argv[0] always exists (maybe as empty string).
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|
521 if (argc <= 0 || argv == NULL) { |
|
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
522 /* Ensure at least one (empty) argument is seen */ |
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|
523 static char *empty_argv[1] = {""}; |
|
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|
524 argv = empty_argv; |
|
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Ensure that sys.argv[0] always exists (maybe as empty string).
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525 argc = 1; |
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
526 } |
| 5372 | 527 av = PyList_New(argc); |
| 86 | 528 if (av != NULL) { |
| 529 int i; | |
| 530 for (i = 0; i < argc; i++) { | |
| 5372 | 531 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 532 if (v == NULL) { |
| 5372 | 533 Py_DECREF(av); |
| 86 | 534 av = NULL; |
| 535 break; | |
| 536 } | |
| 5372 | 537 PyList_SetItem(av, i, v); |
|
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538 } |
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|
539 } |
| 86 | 540 return av; |
| 6 | 541 } |
| 542 | |
| 543 void | |
| 5372 | 544 PySys_SetArgv(argc, argv) |
| 86 | 545 int argc; |
| 546 char **argv; | |
| 6 | 547 { |
| 5372 | 548 PyObject *av = makeargvobject(argc, argv); |
| 549 PyObject *path = PySys_GetObject("path"); | |
| 86 | 550 if (av == NULL) |
| 5372 | 551 Py_FatalError("no mem for sys.argv"); |
| 552 if (PySys_SetObject("argv", av) != 0) | |
| 553 Py_FatalError("can't assign sys.argv"); | |
|
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Always insert script directory in front of sys.path -- if there's no
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|
554 if (path != NULL) { |
|
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|
555 char *argv0 = argv[0]; |
|
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|
556 char *p = NULL; |
|
4256
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|
557 int n = 0; |
| 5372 | 558 PyObject *a; |
|
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559 #ifdef HAVE_READLINK |
|
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|
560 char link[MAXPATHLEN+1]; |
|
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|
561 char argv0copy[2*MAXPATHLEN+1]; |
|
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562 int nr = 0; |
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563 if (argc > 0 && argv0 != NULL) |
|
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|
564 nr = readlink(argv0, link, MAXPATHLEN); |
|
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565 if (nr > 0) { |
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|
566 /* It's a symlink */ |
|
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Expand one level of symbolic link in sys.argv[0] before inserting its
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|
567 link[nr] = '\0'; |
|
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|
568 if (link[0] == SEP) |
|
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|
569 argv0 = link; /* Link to absolute path */ |
|
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570 else if (strchr(link, SEP) == NULL) |
|
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|
571 ; /* Link without path */ |
|
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572 else { |
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|
573 /* Must join(dirname(argv0), link) */ |
|
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574 char *q = strrchr(argv0, SEP); |
|
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575 if (q == NULL) |
|
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576 argv0 = link; /* argv0 without path */ |
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577 else { |
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|
578 /* Must make a copy */ |
|
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|
579 strcpy(argv0copy, argv0); |
|
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|
580 q = strrchr(argv0copy, SEP); |
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|
581 strcpy(q+1, link); |
|
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|
582 argv0 = argv0copy; |
|
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|
583 } |
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584 } |
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585 } |
|
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|
586 #endif /* HAVE_READLINK */ |
|
4256
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587 #if SEP == '\\' /* Special case for MS filename syntax */ |
|
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|
588 if (argc > 0 && argv0 != NULL) { |
|
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589 char *q; |
|
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|
590 p = strrchr(argv0, SEP); |
|
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|
591 /* Test for alternate separator */ |
|
5340
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|
592 q = strrchr(p ? p : argv0, '/'); |
|
4256
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|
593 if (q != NULL) |
|
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|
594 p = q; |
|
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|
595 if (p != NULL) { |
|
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Expand one level of symbolic link in sys.argv[0] before inserting its
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|
596 n = p + 1 - argv0; |
|
4256
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|
597 if (n > 1 && p[-1] != ':') |
|
e225e70fd657
Changes to setpythonpath():
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|
598 n--; /* Drop trailing separator */ |
|
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Changes to setpythonpath():
Guido van Rossum <guido@python.org>
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|
599 } |
|
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Changes to setpythonpath():
Guido van Rossum <guido@python.org>
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|
600 } |
|
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Changes to setpythonpath():
Guido van Rossum <guido@python.org>
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|
601 #else /* All other filename syntaxes */ |
|
5340
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Expand one level of symbolic link in sys.argv[0] before inserting its
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|
602 if (argc > 0 && argv0 != NULL) |
|
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|
603 p = strrchr(argv0, SEP); |
|
4256
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|
604 if (p != NULL) { |
|
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605 n = p + 1 - argv0; |
|
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606 #if SEP == '/' /* Special case for Unix filename syntax */ |
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607 if (n > 1) |
|
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608 n--; /* Drop trailing separator */ |
|
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|
609 #endif /* Unix */ |
|
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610 } |
|
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611 #endif /* All others */ |
| 5372 | 612 a = PyString_FromStringAndSize(argv0, n); |
|
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613 if (a == NULL) |
| 5372 | 614 Py_FatalError("no mem for sys.path insertion"); |
| 615 if (PyList_Insert(path, 0, a) < 0) | |
| 616 Py_FatalError("sys.path.insert(0) failed"); | |
| 617 Py_DECREF(a); | |
|
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618 } |
| 5372 | 619 Py_DECREF(av); |
| 6 | 620 } |
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621 |
|
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622 |
|
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623 /* APIs to write to sys.stdout or sys.stderr using a printf-like interface. |
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624 Adapted from code submitted by Just van Rossum. |
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625 |
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626 PySys_WriteStdout(format, ...) |
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627 PySys_WriteStderr(format, ...) |
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628 |
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629 The first function writes to sys.stdout; the second to sys.stderr. When |
|
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630 there is a problem, they write to the real (C level) stdout or stderr; |
|
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631 no exceptions are raised. |
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632 |
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633 Both take a printf-style format string as their first argument followed |
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634 by a variable length argument list determined by the format string. |
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635 |
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636 *** WARNING *** |
|
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637 |
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638 The format should limit the total size of the formatted output string to |
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639 1000 bytes. In particular, this means that no unrestricted "%s" formats |
|
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640 should occur; these should be limited using "%.<N>s where <N> is a |
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641 decimal number calculated so that <N> plus the maximum size of other |
|
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642 formatted text does not exceed 1000 bytes. Also watch out for "%f", |
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643 which can print hundreds of digits for very large numbers. |
|
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|
644 |
|
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645 */ |
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646 |
|
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647 static void |
|
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648 mywrite(name, fp, format, va) |
|
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649 char *name; |
|
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650 FILE *fp; |
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651 const char *format; |
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652 va_list va; |
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653 { |
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654 PyObject *file; |
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655 PyObject *error_type, *error_value, *error_traceback; |
|
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656 |
|
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657 PyErr_Fetch(&error_type, &error_value, &error_traceback); |
|
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658 file = PySys_GetObject(name); |
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659 if (file == NULL || PyFile_AsFile(file) == fp) |
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660 vfprintf(fp, format, va); |
|
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661 else { |
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662 char buffer[1001]; |
|
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663 if (vsprintf(buffer, format, va) >= sizeof(buffer)) |
|
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664 Py_FatalError("PySys_WriteStdout/err: buffer overrun"); |
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665 if (PyFile_WriteString(buffer, file) != 0) { |
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666 PyErr_Clear(); |
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667 fputs(buffer, fp); |
|
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668 } |
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669 } |
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670 PyErr_Restore(error_type, error_value, error_traceback); |
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671 } |
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672 |
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673 void |
|
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674 #ifdef HAVE_STDARG_PROTOTYPES |
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675 PySys_WriteStdout(const char *format, ...) |
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676 #else |
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677 PySys_WriteStdout(va_alist) |
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678 va_dcl |
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679 #endif |
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680 { |
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681 va_list va; |
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682 |
|
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683 #ifdef HAVE_STDARG_PROTOTYPES |
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684 va_start(va, format); |
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685 #else |
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686 char *format; |
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687 va_start(va); |
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688 format = va_arg(va, char *); |
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689 #endif |
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690 mywrite("stdout", stdout, format, va); |
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691 va_end(va); |
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692 } |
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693 |
|
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694 void |
|
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695 #ifdef HAVE_STDARG_PROTOTYPES |
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696 PySys_WriteStderr(const char *format, ...) |
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697 #else |
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698 PySys_WriteStderr(va_alist) |
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699 va_dcl |
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700 #endif |
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701 { |
|
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702 va_list va; |
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703 |
|
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704 #ifdef HAVE_STDARG_PROTOTYPES |
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705 va_start(va, format); |
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706 #else |
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707 char *format; |
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708 va_start(va); |
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709 format = va_arg(va, char *); |
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710 #endif |
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711 mywrite("stderr", stderr, format, va); |
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712 va_end(va); |
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713 } |