1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*********************************************************
msvcrtmodule.c
A Python interface to the Microsoft Visual C Runtime
Library, providing access to those non-portable, but
still useful routines.
Only ever compiled with an MS compiler, so no attempt
has been made to avoid MS language extensions, etc...
This may only work on NT or 95...
Author: Mark Hammond and Guido van Rossum.
Maintenance: Guido van Rossum.
***********************************************************/
#include "Python.h"
#include "malloc.h"
#include <io.h>
#include <conio.h>
#include <sys/locking.h>
// Force the malloc heap to clean itself up, and free unused blocks
// back to the OS. (According to the docs, only works on NT.)
static PyObject *
msvcrt_heapmin(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":heapmin"))
return NULL;
if (_heapmin() != 0)
return PyErr_SetFromErrno(PyExc_IOError);
Py_INCREF(Py_None);
return Py_None;
}
// Perform locking operations on a C runtime file descriptor.
static PyObject *
msvcrt_locking(PyObject *self, PyObject *args)
{
int fd;
int mode;
long nbytes;
int err;
if (!PyArg_ParseTuple(args, "iil:locking", &fd, &mode, &nbytes))
return NULL;
Py_BEGIN_ALLOW_THREADS
err = _locking(fd, mode, nbytes);
Py_END_ALLOW_THREADS
if (err != 0)
return PyErr_SetFromErrno(PyExc_IOError);
Py_INCREF(Py_None);
return Py_None;
}
// Set the file translation mode for a C runtime file descriptor.
static PyObject *
msvcrt_setmode(PyObject *self, PyObject *args)
{
int fd;
int flags;
if (!PyArg_ParseTuple(args,"ii:setmode", &fd, &flags))
return NULL;
flags = _setmode(fd, flags);
if (flags == -1)
return PyErr_SetFromErrno(PyExc_IOError);
return PyInt_FromLong(flags);
}
// Convert an OS file handle to a C runtime file descriptor.
static PyObject *
msvcrt_open_osfhandle(PyObject *self, PyObject *args)
{
long handle;
int flags;
int fd;
if (!PyArg_ParseTuple(args, "li:open_osfhandle", &handle, &flags))
return NULL;
fd = _open_osfhandle(handle, flags);
if (fd == -1)
return PyErr_SetFromErrno(PyExc_IOError);
return PyInt_FromLong(fd);
}
// Convert a C runtime file descriptor to an OS file handle.
static PyObject *
msvcrt_get_osfhandle(PyObject *self, PyObject *args)
{
int fd;
Py_intptr_t handle;
if (!PyArg_ParseTuple(args,"i:get_osfhandle", &fd))
return NULL;
handle = _get_osfhandle(fd);
if (handle == -1)
return PyErr_SetFromErrno(PyExc_IOError);
/* technically 'handle' is not a pointer, but a integer as
large as a pointer, Python's *VoidPtr interface is the
most appropriate here */
return PyLong_FromVoidPtr((void*)handle);
}
/* Console I/O */
static PyObject *
msvcrt_kbhit(PyObject *self, PyObject *args)
{
int ok;
if (!PyArg_ParseTuple(args, ":kbhit"))
return NULL;
ok = _kbhit();
return PyInt_FromLong(ok);
}
static PyObject *
msvcrt_getch(PyObject *self, PyObject *args)
{
int ch;
char s[1];
if (!PyArg_ParseTuple(args, ":getch"))
return NULL;
Py_BEGIN_ALLOW_THREADS
ch = _getch();
Py_END_ALLOW_THREADS
s[0] = ch;
return PyString_FromStringAndSize(s, 1);
}
static PyObject *
msvcrt_getche(PyObject *self, PyObject *args)
{
int ch;
char s[1];
if (!PyArg_ParseTuple(args, ":getche"))
return NULL;
Py_BEGIN_ALLOW_THREADS
ch = _getche();
Py_END_ALLOW_THREADS
s[0] = ch;
return PyString_FromStringAndSize(s, 1);
}
static PyObject *
msvcrt_putch(PyObject *self, PyObject *args)
{
char ch;
if (!PyArg_ParseTuple(args, "c:putch", &ch))
return NULL;
_putch(ch);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
msvcrt_ungetch(PyObject *self, PyObject *args)
{
char ch;
if (!PyArg_ParseTuple(args, "c:ungetch", &ch))
return NULL;
if (_ungetch(ch) == EOF)
return PyErr_SetFromErrno(PyExc_IOError);
Py_INCREF(Py_None);
return Py_None;
}
static void
insertint(PyObject *d, char *name, int value)
{
PyObject *v = PyInt_FromLong((long) value);
if (v == NULL) {
/* Don't bother reporting this error */
PyErr_Clear();
}
else {
PyDict_SetItemString(d, name, v);
Py_DECREF(v);
}
}
/* List of functions exported by this module */
static struct PyMethodDef msvcrt_functions[] = {
{"heapmin", msvcrt_heapmin, 1},
{"locking", msvcrt_locking, 1},
{"setmode", msvcrt_setmode, 1},
{"open_osfhandle", msvcrt_open_osfhandle, 1},
{"get_osfhandle", msvcrt_get_osfhandle, 1},
{"kbhit", msvcrt_kbhit, 1},
{"getch", msvcrt_getch, 1},
{"getche", msvcrt_getche, 1},
{"putch", msvcrt_putch, 1},
{"ungetch", msvcrt_ungetch, 1},
{NULL, NULL}
};
__declspec(dllexport) void
initmsvcrt(void)
{
PyObject *m = Py_InitModule("msvcrt", msvcrt_functions);
PyObject *d = PyModule_GetDict(m);
/* constants for the locking() function's mode argument */
insertint(d, "LK_LOCK", _LK_LOCK);
insertint(d, "LK_NBLCK", _LK_NBLCK);
insertint(d, "LK_NBRLCK", _LK_NBRLCK);
insertint(d, "LK_RLCK", _LK_RLCK);
insertint(d, "LK_UNLCK", _LK_UNLCK);
}
|
