Mercurial > cpython-lru_cache-weakref

annotate PC/msvcrtmodule.c @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*********************************************************
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3 msvcrtmodule.c
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4
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5 A Python interface to the Microsoft Visual C Runtime
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6 Library, providing access to those non-portable, but
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7 still useful routines.
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8
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9 Only ever compiled with an MS compiler, so no attempt
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10 has been made to avoid MS language extensions, etc...
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11
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12 This may only work on NT or 95...
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14 Author: Mark Hammond and Guido van Rossum.
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15 Maintenance: Guido van Rossum.
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16
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17 ***********************************************************/
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18
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19 #include "Python.h"
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20 #include "malloc.h"
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21 #include <io.h>
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22 #include <conio.h>
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23 #include <sys/locking.h>
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25 #ifdef _MSC_VER
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26 #if _MSC_VER >= 1500 && _MSC_VER < 1600
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27 #include <crtassem.h>
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28 #endif
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29 #endif
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30
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31 // Force the malloc heap to clean itself up, and free unused blocks
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32 // back to the OS. (According to the docs, only works on NT.)
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33 static PyObject *
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34 msvcrt_heapmin(PyObject *self, PyObject *args)
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35 {
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36 if (!PyArg_ParseTuple(args, ":heapmin"))
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37 return NULL;
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38
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39 if (_heapmin() != 0)
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40 return PyErr_SetFromErrno(PyExc_IOError);
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42 Py_INCREF(Py_None);
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43 return Py_None;
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44 }
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45
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46 PyDoc_STRVAR(heapmin_doc,
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47 "heapmin() -> None\n\
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48 \n\
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49 Force the malloc() heap to clean itself up and return unused blocks\n\
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50 to the operating system. On failure, this raises IOError.");
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51
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52 // Perform locking operations on a C runtime file descriptor.
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53 static PyObject *
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54 msvcrt_locking(PyObject *self, PyObject *args)
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55 {
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56 int fd;
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57 int mode;
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58 long nbytes;
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59 int err;
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60
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61 if (!PyArg_ParseTuple(args, "iil:locking", &fd, &mode, &nbytes))
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62 return NULL;
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63
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64 Py_BEGIN_ALLOW_THREADS
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65 err = _locking(fd, mode, nbytes);
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66 Py_END_ALLOW_THREADS
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67 if (err != 0)
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68 return PyErr_SetFromErrno(PyExc_IOError);
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69
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70 Py_INCREF(Py_None);
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71 return Py_None;
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72 }
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73
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74 PyDoc_STRVAR(locking_doc,
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75 "locking(fd, mode, nbytes) -> None\n\
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76 \n\
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77 Lock part of a file based on file descriptor fd from the C runtime.\n\
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78 Raises IOError on failure. The locked region of the file extends from\n\
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79 the current file position for nbytes bytes, and may continue beyond\n\
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80 the end of the file. mode must be one of the LK_* constants listed\n\
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81 below. Multiple regions in a file may be locked at the same time, but\n\
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82 may not overlap. Adjacent regions are not merged; they must be unlocked\n\
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83 individually.");
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84
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85 // Set the file translation mode for a C runtime file descriptor.
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86 static PyObject *
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87 msvcrt_setmode(PyObject *self, PyObject *args)
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88 {
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89 int fd;
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90 int flags;
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91 if (!PyArg_ParseTuple(args,"ii:setmode", &fd, &flags))
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92 return NULL;
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93
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94 flags = _setmode(fd, flags);
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95 if (flags == -1)
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96 return PyErr_SetFromErrno(PyExc_IOError);
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97
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98 return PyInt_FromLong(flags);
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99 }
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100
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101 PyDoc_STRVAR(setmode_doc,
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102 "setmode(fd, mode) -> Previous mode\n\
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103 \n\
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104 Set the line-end translation mode for the file descriptor fd. To set\n\
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105 it to text mode, flags should be os.O_TEXT; for binary, it should be\n\
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106 os.O_BINARY.");
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107
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108 // Convert an OS file handle to a C runtime file descriptor.
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109 static PyObject *
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110 msvcrt_open_osfhandle(PyObject *self, PyObject *args)
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111 {
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112 long handle;
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113 int flags;
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114 int fd;
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115
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116 if (!PyArg_ParseTuple(args, "li:open_osfhandle", &handle, &flags))
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117 return NULL;
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118
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119 fd = _open_osfhandle(handle, flags);
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120 if (fd == -1)
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121 return PyErr_SetFromErrno(PyExc_IOError);
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122
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123 return PyInt_FromLong(fd);
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124 }
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125
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126 PyDoc_STRVAR(open_osfhandle_doc,
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127 "open_osfhandle(handle, flags) -> file descriptor\n\
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128 \n\
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129 Create a C runtime file descriptor from the file handle handle. The\n\
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130 flags parameter should be a bitwise OR of os.O_APPEND, os.O_RDONLY,\n\
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131 and os.O_TEXT. The returned file descriptor may be used as a parameter\n\
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132 to os.fdopen() to create a file object.");
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133
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134 // Convert a C runtime file descriptor to an OS file handle.
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135 static PyObject *
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136 msvcrt_get_osfhandle(PyObject *self, PyObject *args)
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137 {
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138 int fd;
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139 Py_intptr_t handle;
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140
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141 if (!PyArg_ParseTuple(args,"i:get_osfhandle", &fd))
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142 return NULL;
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143
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144 if (!_PyVerify_fd(fd))
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145 return PyErr_SetFromErrno(PyExc_IOError);
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146
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147 handle = _get_osfhandle(fd);
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148 if (handle == -1)
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149 return PyErr_SetFromErrno(PyExc_IOError);
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150
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151 /* technically 'handle' is not a pointer, but a integer as
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152 large as a pointer, Python's *VoidPtr interface is the
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153 most appropriate here */
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154 return PyLong_FromVoidPtr((void*)handle);
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155 }
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156
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157 PyDoc_STRVAR(get_osfhandle_doc,
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158 "get_osfhandle(fd) -> file handle\n\
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159 \n\
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160 Return the file handle for the file descriptor fd. Raises IOError\n\
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161 if fd is not recognized.");
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162
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163 /* Console I/O */
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164
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165 static PyObject *
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166 msvcrt_kbhit(PyObject *self, PyObject *args)
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167 {
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168 int ok;
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169
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170 if (!PyArg_ParseTuple(args, ":kbhit"))
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171 return NULL;
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172
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173 ok = _kbhit();
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174 return PyInt_FromLong(ok);
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175 }
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176
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177 PyDoc_STRVAR(kbhit_doc,
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178 "kbhit() -> bool\n\
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179 \n\
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180 Return true if a keypress is waiting to be read.");
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181
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182 static PyObject *
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183 msvcrt_getch(PyObject *self, PyObject *args)
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184 {
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185 int ch;
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186 char s[1];
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187
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188 if (!PyArg_ParseTuple(args, ":getch"))
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189 return NULL;
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190
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191 Py_BEGIN_ALLOW_THREADS
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192 ch = _getch();
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193 Py_END_ALLOW_THREADS
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194 s[0] = ch;
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195 return PyString_FromStringAndSize(s, 1);
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196 }
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197
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198 PyDoc_STRVAR(getch_doc,
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199 "getch() -> key character\n\
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200 \n\
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201 Read a keypress and return the resulting character. Nothing is echoed to\n\
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202 the console. This call will block if a keypress is not already\n\
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203 available, but will not wait for Enter to be pressed. If the pressed key\n\
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204 was a special function key, this will return '\\000' or '\\xe0'; the next\n\
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205 call will return the keycode. The Control-C keypress cannot be read with\n\
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206 this function.");
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207
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208 #ifdef _WCONIO_DEFINED
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209 static PyObject *
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210 msvcrt_getwch(PyObject *self, PyObject *args)
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211 {
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212 Py_UNICODE ch;
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213 Py_UNICODE u[1];
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214
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215 if (!PyArg_ParseTuple(args, ":getwch"))
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216 return NULL;
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217
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218 Py_BEGIN_ALLOW_THREADS
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219 ch = _getwch();
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220 Py_END_ALLOW_THREADS
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221 u[0] = ch;
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222 return PyUnicode_FromUnicode(u, 1);
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223 }
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224
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225 PyDoc_STRVAR(getwch_doc,
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226 "getwch() -> Unicode key character\n\
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227 \n\
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228 Wide char variant of getch(), returning a Unicode value.");
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229 #endif
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230
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231 static PyObject *
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232 msvcrt_getche(PyObject *self, PyObject *args)
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233 {
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234 int ch;
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235 char s[1];
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236
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237 if (!PyArg_ParseTuple(args, ":getche"))
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238 return NULL;
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239
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240 Py_BEGIN_ALLOW_THREADS
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241 ch = _getche();
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242 Py_END_ALLOW_THREADS
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243 s[0] = ch;
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244 return PyString_FromStringAndSize(s, 1);
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245 }
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246
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247 PyDoc_STRVAR(getche_doc,
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248 "getche() -> key character\n\
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249 \n\
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250 Similar to getch(), but the keypress will be echoed if it represents\n\
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251 a printable character.");
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252
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253 #ifdef _WCONIO_DEFINED
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254 static PyObject *
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255 msvcrt_getwche(PyObject *self, PyObject *args)
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256 {
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257 Py_UNICODE ch;
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258 Py_UNICODE s[1];
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259
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260 if (!PyArg_ParseTuple(args, ":getwche"))
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261 return NULL;
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262
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263 Py_BEGIN_ALLOW_THREADS
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264 ch = _getwche();
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265 Py_END_ALLOW_THREADS
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266 s[0] = ch;
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267 return PyUnicode_FromUnicode(s, 1);
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268 }
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269
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270 PyDoc_STRVAR(getwche_doc,
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271 "getwche() -> Unicode key character\n\
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272 \n\
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273 Wide char variant of getche(), returning a Unicode value.");
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274 #endif
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275
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276 static PyObject *
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277 msvcrt_putch(PyObject *self, PyObject *args)
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278 {
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279 char ch;
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280
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281 if (!PyArg_ParseTuple(args, "c:putch", &ch))
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282 return NULL;
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283
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284 _putch(ch);
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285 Py_INCREF(Py_None);
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286 return Py_None;
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287 }
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288
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289 PyDoc_STRVAR(putch_doc,
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290 "putch(char) -> None\n\
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291 \n\
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292 Print the character char to the console without buffering.");
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293
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294 #ifdef _WCONIO_DEFINED
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295 static PyObject *
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296 msvcrt_putwch(PyObject *self, PyObject *args)
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297 {
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298 Py_UNICODE *ch;
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299 int size;
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300
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301 if (!PyArg_ParseTuple(args, "u#:putwch", &ch, &size))
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302 return NULL;
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303
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304 if (size == 0) {
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305 PyErr_SetString(PyExc_ValueError,
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306 "Expected unicode string of length 1");
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307 return NULL;
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308 }
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309 _putwch(*ch);
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310 Py_RETURN_NONE;
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311
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312 }
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313
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314 PyDoc_STRVAR(putwch_doc,
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315 "putwch(unicode_char) -> None\n\
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316 \n\
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317 Wide char variant of putch(), accepting a Unicode value.");
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318 #endif
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319
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320 static PyObject *
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321 msvcrt_ungetch(PyObject *self, PyObject *args)
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322 {
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323 char ch;
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324
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325 if (!PyArg_ParseTuple(args, "c:ungetch", &ch))
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326 return NULL;
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327
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328 if (_ungetch(ch) == EOF)
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329 return PyErr_SetFromErrno(PyExc_IOError);
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330 Py_INCREF(Py_None);
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331 return Py_None;
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332 }
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333
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334 PyDoc_STRVAR(ungetch_doc,
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335 "ungetch(char) -> None\n\
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336 \n\
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337 Cause the character char to be \"pushed back\" into the console buffer;\n\
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338 it will be the next character read by getch() or getche().");
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339
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340 #ifdef _WCONIO_DEFINED
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341 static PyObject *
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342 msvcrt_ungetwch(PyObject *self, PyObject *args)
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343 {
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344 Py_UNICODE ch;
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345
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346 if (!PyArg_ParseTuple(args, "u:ungetwch", &ch))
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347 return NULL;
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348
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349 if (_ungetch(ch) == EOF)
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350 return PyErr_SetFromErrno(PyExc_IOError);
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351 Py_INCREF(Py_None);
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352 return Py_None;
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353 }
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354
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355 PyDoc_STRVAR(ungetwch_doc,
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356 "ungetwch(unicode_char) -> None\n\
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357 \n\
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358 Wide char variant of ungetch(), accepting a Unicode value.");
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359 #endif
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360
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361 static void
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362 insertint(PyObject *d, char *name, int value)
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363 {
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364 PyObject *v = PyInt_FromLong((long) value);
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365 if (v == NULL) {
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366 /* Don't bother reporting this error */
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367 PyErr_Clear();
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368 }
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369 else {
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370 PyDict_SetItemString(d, name, v);
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371 Py_DECREF(v);
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372 }
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373 }
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374
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375
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376 /* List of functions exported by this module */
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377 static struct PyMethodDef msvcrt_functions[] = {
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378 {"heapmin", msvcrt_heapmin, METH_VARARGS, heapmin_doc},
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379 {"locking", msvcrt_locking, METH_VARARGS, locking_doc},
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380 {"setmode", msvcrt_setmode, METH_VARARGS, setmode_doc},
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381 {"open_osfhandle", msvcrt_open_osfhandle, METH_VARARGS, open_osfhandle_doc},
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382 {"get_osfhandle", msvcrt_get_osfhandle, METH_VARARGS, get_osfhandle_doc},
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383 {"kbhit", msvcrt_kbhit, METH_VARARGS, kbhit_doc},
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384 {"getch", msvcrt_getch, METH_VARARGS, getch_doc},
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385 {"getche", msvcrt_getche, METH_VARARGS, getche_doc},
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386 {"putch", msvcrt_putch, METH_VARARGS, putch_doc},
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387 {"ungetch", msvcrt_ungetch, METH_VARARGS, ungetch_doc},
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 47527
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388 #ifdef _WCONIO_DEFINED
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389 {"getwch", msvcrt_getwch, METH_VARARGS, getwch_doc},
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390 {"getwche", msvcrt_getwche, METH_VARARGS, getwche_doc},
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391 {"putwch", msvcrt_putwch, METH_VARARGS, putwch_doc},
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392 {"ungetwch", msvcrt_ungetwch, METH_VARARGS, ungetwch_doc},
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393 #endif
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394 {NULL, NULL}
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395 };
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396
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Thomas Heller <theller@ctypes.org>
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397 PyMODINIT_FUNC
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398 initmsvcrt(void)
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399 {
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400 int st;
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401 PyObject *d;
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402 PyObject *m = Py_InitModule("msvcrt", msvcrt_functions);
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403 if (m == NULL)
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404 return;
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405 d = PyModule_GetDict(m);
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parents: 13233
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406
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407 /* constants for the locking() function's mode argument */
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408 insertint(d, "LK_LOCK", _LK_LOCK);
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409 insertint(d, "LK_NBLCK", _LK_NBLCK);
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410 insertint(d, "LK_NBRLCK", _LK_NBRLCK);
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411 insertint(d, "LK_RLCK", _LK_RLCK);
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412 insertint(d, "LK_UNLCK", _LK_UNLCK);
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413
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414 /* constants for the crt versions */
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415 #ifdef _VC_ASSEMBLY_PUBLICKEYTOKEN
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416 st = PyModule_AddStringConstant(m, "VC_ASSEMBLY_PUBLICKEYTOKEN",
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417 _VC_ASSEMBLY_PUBLICKEYTOKEN);
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418 if (st < 0)return;
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419 #endif
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420 #ifdef _CRT_ASSEMBLY_VERSION
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421 st = PyModule_AddStringConstant(m, "CRT_ASSEMBLY_VERSION",
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422 _CRT_ASSEMBLY_VERSION);
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423 if (st < 0)return;
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424 #endif
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425 #ifdef __LIBRARIES_ASSEMBLY_NAME_PREFIX
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426 st = PyModule_AddStringConstant(m, "LIBRARIES_ASSEMBLY_NAME_PREFIX",
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427 __LIBRARIES_ASSEMBLY_NAME_PREFIX);
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428 if (st < 0)return;
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429 #endif
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430 }