Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1 | /* |
| 2 | / Author: Sam Rushing <rushing@nightmare.com> |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 3 | / Hacked for Unix by A.M. Kuchling <amk1@bigfoot.com> |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 4 | / $Id$ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 5 | |
| 6 | / mmapmodule.cpp -- map a view of a file into memory |
| 7 | / |
| 8 | / todo: need permission flags, perhaps a 'chsize' analog |
| 9 | / not all functions check range yet!!! |
| 10 | / |
| 11 | / |
| 12 | / Note: This module currently only deals with 32-bit file |
| 13 | / sizes. |
| 14 | / |
| 15 | / The latest version of mmapfile is maintained by Sam at |
| 16 | / ftp://squirl.nightmare.com/pub/python/python-ext. |
| 17 | */ |
| 18 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 19 | #include <Python.h> |
| 20 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 21 | #ifndef MS_WIN32 |
| 22 | #define UNIX |
| 23 | #endif |
| 24 | |
| 25 | #ifdef MS_WIN32 |
| 26 | #include <windows.h> |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 27 | #if _MSC_VER < 1200 |
| 28 | #define INT_PTR unsigned long |
| 29 | #endif |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 30 | #endif |
| 31 | |
| 32 | #ifdef UNIX |
| 33 | #include <unistd.h> |
| 34 | #include <sys/mman.h> |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 35 | #include <sys/stat.h> |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 36 | #endif |
| 37 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 38 | #include <string.h> |
| 39 | #include <sys/types.h> |
| 40 | |
| 41 | static PyObject *mmap_module_error; |
| 42 | |
| 43 | typedef struct { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 44 | PyObject_HEAD |
| 45 | char * data; |
| 46 | size_t size; |
| 47 | size_t pos; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 48 | |
| 49 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 50 | HANDLE map_handle; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 51 | INT_PTR file_handle; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 52 | char * tagname; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 53 | #endif |
| 54 | |
| 55 | #ifdef UNIX |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 56 | int fd; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 57 | #endif |
| 58 | } mmap_object; |
| 59 | |
| 60 | static void |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 61 | mmap_object_dealloc(mmap_object *m_obj) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 62 | { |
| 63 | #ifdef MS_WIN32 |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame^] | 64 | if (m_obj->data != NULL) |
| 65 | UnmapViewOfFile (m_obj->data); |
| 66 | if (m_obj->map_handle != INVALID_HANDLE_VALUE) |
| 67 | CloseHandle (m_obj->map_handle); |
| 68 | if ((HANDLE)m_obj->file_handle != INVALID_HANDLE_VALUE) |
| 69 | CloseHandle ((HANDLE)m_obj->file_handle); |
| 70 | if (m_obj->tagname) |
| 71 | PyMem_Free(m_obj->tagname); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 72 | #endif /* MS_WIN32 */ |
| 73 | |
| 74 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 75 | if (m_obj->data!=NULL) { |
Andrew M. Kuchling | 9bc5f33 | 2000-06-18 04:25:08 +0000 | [diff] [blame] | 76 | msync(m_obj->data, m_obj->size, MS_SYNC); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 77 | munmap(m_obj->data, m_obj->size); |
| 78 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 79 | #endif /* UNIX */ |
| 80 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 81 | PyObject_Del(m_obj); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 85 | mmap_close_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 86 | { |
Andrew M. Kuchling | 841b9fb | 2000-06-03 20:43:43 +0000 | [diff] [blame] | 87 | if (!PyArg_ParseTuple(args, ":close")) |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 88 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 89 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 90 | UnmapViewOfFile (self->data); |
| 91 | CloseHandle (self->map_handle); |
| 92 | CloseHandle ((HANDLE)self->file_handle); |
| 93 | self->map_handle = (HANDLE) NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 94 | #endif /* MS_WIN32 */ |
| 95 | |
| 96 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 97 | munmap(self->data, self->size); |
| 98 | self->data = NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 99 | #endif |
| 100 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 101 | Py_INCREF (Py_None); |
| 102 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 106 | #define CHECK_VALID(err) \ |
| 107 | do { \ |
| 108 | if (!self->map_handle) { \ |
| 109 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 110 | return err; \ |
| 111 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 112 | } while (0) |
| 113 | #endif /* MS_WIN32 */ |
| 114 | |
| 115 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 116 | #define CHECK_VALID(err) \ |
| 117 | do { \ |
| 118 | if (self->data == NULL) { \ |
| 119 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 120 | return err; \ |
| 121 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 122 | } while (0) |
| 123 | #endif /* UNIX */ |
| 124 | |
| 125 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 126 | mmap_read_byte_method(mmap_object *self, |
| 127 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 128 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 129 | char value; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 130 | char *where; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 131 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 841b9fb | 2000-06-03 20:43:43 +0000 | [diff] [blame] | 132 | if (!PyArg_ParseTuple(args, ":read_byte")) |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 133 | return NULL; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 134 | if (self->pos < self->size) { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 135 | where = self->data + self->pos; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 136 | value = (char) *(where); |
| 137 | self->pos += 1; |
| 138 | return Py_BuildValue("c", (char) *(where)); |
| 139 | } else { |
| 140 | PyErr_SetString (PyExc_ValueError, "read byte out of range"); |
| 141 | return NULL; |
| 142 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 146 | mmap_read_line_method(mmap_object *self, |
| 147 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 148 | { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 149 | char *start = self->data+self->pos; |
| 150 | char *eof = self->data+self->size; |
| 151 | char *eol; |
| 152 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 153 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 154 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 841b9fb | 2000-06-03 20:43:43 +0000 | [diff] [blame] | 155 | if (!PyArg_ParseTuple(args, ":readline")) |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 156 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 157 | |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 158 | eol = memchr(start, '\n', self->size - self->pos); |
| 159 | if (!eol) |
| 160 | eol = eof; |
| 161 | else |
| 162 | ++eol; /* we're interested in the position after the |
| 163 | newline. */ |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 164 | result = PyString_FromStringAndSize(start, (eol - start)); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 165 | self->pos += (eol - start); |
| 166 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 170 | mmap_read_method(mmap_object *self, |
| 171 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 172 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 173 | long num_bytes; |
| 174 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 175 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 176 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 177 | if (!PyArg_ParseTuple(args, "l:read", &num_bytes)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 178 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 179 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 180 | /* silently 'adjust' out-of-range requests */ |
| 181 | if ((self->pos + num_bytes) > self->size) { |
| 182 | num_bytes -= (self->pos+num_bytes) - self->size; |
| 183 | } |
| 184 | result = Py_BuildValue("s#", self->data+self->pos, num_bytes); |
| 185 | self->pos += num_bytes; |
| 186 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 190 | mmap_find_method(mmap_object *self, |
| 191 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 192 | { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 193 | int start = self->pos; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 194 | char *needle; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 195 | int len; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 196 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 197 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 198 | if (!PyArg_ParseTuple (args, "s#|i:find", &needle, &len, &start)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 199 | return NULL; |
| 200 | } else { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 201 | char *p = self->data+self->pos; |
| 202 | char *e = self->data+self->size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 203 | while (p < e) { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 204 | char *s = p; |
| 205 | char *n = needle; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 206 | while ((s<e) && (*n) && !(*s-*n)) { |
| 207 | s++, n++; |
| 208 | } |
| 209 | if (!*n) { |
| 210 | return Py_BuildValue ( |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 211 | "i", |
| 212 | (int) (p - (self->data + start))); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 213 | } |
| 214 | p++; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 215 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 216 | return Py_BuildValue ("l", (long) -1); |
| 217 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 221 | mmap_write_method(mmap_object *self, |
| 222 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 223 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 224 | long length; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 225 | char *data; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 226 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 227 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 228 | if (!PyArg_ParseTuple (args, "s#:write", &data, &length)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 229 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 230 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 231 | if ((self->pos + length) > self->size) { |
| 232 | PyErr_SetString (PyExc_ValueError, "data out of range"); |
| 233 | return NULL; |
| 234 | } |
| 235 | memcpy (self->data+self->pos, data, length); |
| 236 | self->pos = self->pos+length; |
| 237 | Py_INCREF (Py_None); |
| 238 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 242 | mmap_write_byte_method(mmap_object *self, |
| 243 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 244 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 245 | char value; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 246 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 247 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 248 | if (!PyArg_ParseTuple (args, "c:write_byte", &value)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 249 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 250 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 251 | *(self->data+self->pos) = value; |
| 252 | self->pos += 1; |
| 253 | Py_INCREF (Py_None); |
| 254 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 258 | mmap_size_method(mmap_object *self, |
| 259 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 260 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 261 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 841b9fb | 2000-06-03 20:43:43 +0000 | [diff] [blame] | 262 | if (!PyArg_ParseTuple(args, ":size")) |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 263 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 264 | |
| 265 | #ifdef MS_WIN32 |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 266 | if (self->file_handle != (INT_PTR) -1) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 267 | return (Py_BuildValue ( |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 268 | "l", (long) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 269 | GetFileSize ((HANDLE)self->file_handle, NULL))); |
| 270 | } else { |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 271 | return (Py_BuildValue ("l", (long) self->size) ); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 272 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 273 | #endif /* MS_WIN32 */ |
| 274 | |
| 275 | #ifdef UNIX |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 276 | { |
| 277 | struct stat buf; |
| 278 | if (-1 == fstat(self->fd, &buf)) { |
| 279 | PyErr_SetFromErrno(mmap_module_error); |
| 280 | return NULL; |
| 281 | } |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 282 | return (Py_BuildValue ("l", (long) buf.st_size) ); |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 283 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 284 | #endif /* UNIX */ |
| 285 | } |
| 286 | |
| 287 | /* This assumes that you want the entire file mapped, |
| 288 | / and when recreating the map will make the new file |
| 289 | / have the new size |
| 290 | / |
| 291 | / Is this really necessary? This could easily be done |
| 292 | / from python by just closing and re-opening with the |
| 293 | / new size? |
| 294 | */ |
| 295 | |
| 296 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 297 | mmap_resize_method(mmap_object *self, |
| 298 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 299 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 300 | unsigned long new_size; |
| 301 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 302 | if (!PyArg_ParseTuple (args, "l:resize", &new_size)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 303 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 304 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 305 | } else { |
| 306 | DWORD dwErrCode = 0; |
| 307 | /* First, unmap the file view */ |
| 308 | UnmapViewOfFile (self->data); |
| 309 | /* Close the mapping object */ |
| 310 | CloseHandle ((HANDLE)self->map_handle); |
| 311 | /* Move to the desired EOF position */ |
| 312 | SetFilePointer ((HANDLE)self->file_handle, |
| 313 | new_size, NULL, FILE_BEGIN); |
| 314 | /* Change the size of the file */ |
| 315 | SetEndOfFile ((HANDLE)self->file_handle); |
| 316 | /* Create another mapping object and remap the file view */ |
| 317 | self->map_handle = CreateFileMapping ( |
| 318 | (HANDLE) self->file_handle, |
| 319 | NULL, |
| 320 | PAGE_READWRITE, |
| 321 | 0, |
| 322 | new_size, |
| 323 | self->tagname); |
| 324 | if (self->map_handle != NULL) { |
| 325 | self->data = (char *) MapViewOfFile (self->map_handle, |
| 326 | FILE_MAP_WRITE, |
| 327 | 0, |
| 328 | 0, |
| 329 | 0); |
| 330 | if (self->data != NULL) { |
| 331 | self->size = new_size; |
| 332 | Py_INCREF (Py_None); |
| 333 | return Py_None; |
| 334 | } else { |
| 335 | dwErrCode = GetLastError(); |
| 336 | } |
| 337 | } else { |
| 338 | dwErrCode = GetLastError(); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 339 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 340 | PyErr_SetFromWindowsErr(dwErrCode); |
| 341 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 342 | #endif /* MS_WIN32 */ |
| 343 | |
| 344 | #ifdef UNIX |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 345 | #ifndef HAVE_MREMAP |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 346 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 347 | PyErr_SetString(PyExc_SystemError, |
| 348 | "mmap: resizing not available--no mremap()"); |
| 349 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 350 | #else |
| 351 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 352 | void *newmap; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 353 | |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 354 | #ifdef MREMAP_MAYMOVE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 355 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 356 | #else |
| 357 | newmap = mremap(self->data, self->size, new_size, 0); |
| 358 | #endif |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 359 | if (newmap == (void *)-1) |
| 360 | { |
| 361 | PyErr_SetFromErrno(mmap_module_error); |
| 362 | return NULL; |
| 363 | } |
| 364 | self->data = newmap; |
| 365 | self->size = new_size; |
| 366 | Py_INCREF(Py_None); |
| 367 | return Py_None; |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 368 | #endif /* HAVE_MREMAP */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 369 | #endif /* UNIX */ |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 374 | mmap_tell_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 375 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 376 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 841b9fb | 2000-06-03 20:43:43 +0000 | [diff] [blame] | 377 | if (!PyArg_ParseTuple(args, ":tell")) |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 378 | return NULL; |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 379 | return (Py_BuildValue ("l", (long) self->pos) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 383 | mmap_flush_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 384 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 385 | size_t offset = 0; |
| 386 | size_t size = self->size; |
| 387 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 388 | if (!PyArg_ParseTuple (args, "|ll:flush", &offset, &size)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 389 | return NULL; |
| 390 | } else if ((offset + size) > self->size) { |
| 391 | PyErr_SetString (PyExc_ValueError, |
| 392 | "flush values out of range"); |
| 393 | return NULL; |
| 394 | } else { |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 395 | #ifdef MS_WIN32 |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 396 | return (Py_BuildValue("l", (long) |
| 397 | FlushViewOfFile(self->data+offset, size))); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 398 | #endif /* MS_WIN32 */ |
| 399 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 400 | /* XXX semantics of return value? */ |
| 401 | /* XXX flags for msync? */ |
| 402 | if (-1 == msync(self->data + offset, size, |
Andrew M. Kuchling | 9bc5f33 | 2000-06-18 04:25:08 +0000 | [diff] [blame] | 403 | MS_SYNC)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 404 | { |
| 405 | PyErr_SetFromErrno(mmap_module_error); |
| 406 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 407 | } |
Fredrik Lundh | 5cccf50 | 2000-07-09 13:16:13 +0000 | [diff] [blame] | 408 | return Py_BuildValue ("l", (long) 0); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 409 | #endif /* UNIX */ |
| 410 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 414 | mmap_seek_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 415 | { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 416 | int dist; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 417 | int how=0; |
| 418 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 419 | if (!PyArg_ParseTuple (args, "i|i:seek", &dist, &how)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 420 | return(NULL); |
| 421 | } else { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 422 | size_t where; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 423 | switch (how) { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 424 | case 0: /* relative to start */ |
| 425 | if (dist < 0) |
| 426 | goto onoutofrange; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 427 | where = dist; |
| 428 | break; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 429 | case 1: /* relative to current position */ |
| 430 | if ((int)self->pos + dist < 0) |
| 431 | goto onoutofrange; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 432 | where = self->pos + dist; |
| 433 | break; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 434 | case 2: /* relative to end */ |
| 435 | if ((int)self->size + dist < 0) |
| 436 | goto onoutofrange; |
| 437 | where = self->size + dist; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 438 | break; |
| 439 | default: |
| 440 | PyErr_SetString (PyExc_ValueError, |
| 441 | "unknown seek type"); |
| 442 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 443 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 444 | if (where > self->size) |
| 445 | goto onoutofrange; |
| 446 | self->pos = where; |
| 447 | Py_INCREF (Py_None); |
| 448 | return (Py_None); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 449 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 450 | |
| 451 | onoutofrange: |
| 452 | PyErr_SetString (PyExc_ValueError, "seek out of range"); |
| 453 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 457 | mmap_move_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 458 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 459 | unsigned long dest, src, count; |
| 460 | CHECK_VALID(NULL); |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 461 | if (!PyArg_ParseTuple (args, "iii:move", &dest, &src, &count)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 462 | return NULL; |
| 463 | } else { |
| 464 | /* bounds check the values */ |
| 465 | if (/* end of source after end of data?? */ |
| 466 | ((src+count) > self->size) |
| 467 | /* dest will fit? */ |
| 468 | || (dest+count > self->size)) { |
| 469 | PyErr_SetString (PyExc_ValueError, |
| 470 | "source or destination out of range"); |
| 471 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 472 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 473 | memmove (self->data+dest, self->data+src, count); |
| 474 | Py_INCREF (Py_None); |
| 475 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 476 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 477 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | static struct PyMethodDef mmap_object_methods[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 481 | {"close", (PyCFunction) mmap_close_method, 1}, |
| 482 | {"find", (PyCFunction) mmap_find_method, 1}, |
| 483 | {"flush", (PyCFunction) mmap_flush_method, 1}, |
| 484 | {"move", (PyCFunction) mmap_move_method, 1}, |
| 485 | {"read", (PyCFunction) mmap_read_method, 1}, |
| 486 | {"read_byte", (PyCFunction) mmap_read_byte_method, 1}, |
| 487 | {"readline", (PyCFunction) mmap_read_line_method, 1}, |
| 488 | {"resize", (PyCFunction) mmap_resize_method, 1}, |
| 489 | {"seek", (PyCFunction) mmap_seek_method, 1}, |
| 490 | {"size", (PyCFunction) mmap_size_method, 1}, |
| 491 | {"tell", (PyCFunction) mmap_tell_method, 1}, |
| 492 | {"write", (PyCFunction) mmap_write_method, 1}, |
| 493 | {"write_byte", (PyCFunction) mmap_write_byte_method, 1}, |
| 494 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 495 | }; |
| 496 | |
| 497 | /* Functions for treating an mmap'ed file as a buffer */ |
| 498 | |
| 499 | static int |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 500 | mmap_buffer_getreadbuf(mmap_object *self, int index, const void **ptr) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 501 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 502 | CHECK_VALID(-1); |
| 503 | if ( index != 0 ) { |
| 504 | PyErr_SetString(PyExc_SystemError, |
| 505 | "Accessing non-existent mmap segment"); |
| 506 | return -1; |
| 507 | } |
| 508 | *ptr = self->data; |
| 509 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 513 | mmap_buffer_getwritebuf(mmap_object *self, int index, const void **ptr) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 514 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 515 | CHECK_VALID(-1); |
| 516 | if ( index != 0 ) { |
| 517 | PyErr_SetString(PyExc_SystemError, |
| 518 | "Accessing non-existent mmap segment"); |
| 519 | return -1; |
| 520 | } |
| 521 | *ptr = self->data; |
| 522 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 526 | mmap_buffer_getsegcount(mmap_object *self, int *lenp) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 527 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 528 | CHECK_VALID(-1); |
| 529 | if (lenp) |
| 530 | *lenp = self->size; |
| 531 | return 1; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 535 | mmap_buffer_getcharbuffer(mmap_object *self, int index, const void **ptr) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 536 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 537 | if ( index != 0 ) { |
| 538 | PyErr_SetString(PyExc_SystemError, |
| 539 | "accessing non-existent buffer segment"); |
| 540 | return -1; |
| 541 | } |
| 542 | *ptr = (const char *)self->data; |
| 543 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 547 | mmap_object_getattr(mmap_object *self, char *name) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 548 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 549 | return Py_FindMethod (mmap_object_methods, (PyObject *)self, name); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 553 | mmap_length(mmap_object *self) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 554 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 555 | CHECK_VALID(-1); |
| 556 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 560 | mmap_item(mmap_object *self, int i) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 561 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 562 | CHECK_VALID(NULL); |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 563 | if (i < 0 || (size_t)i >= self->size) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 564 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 565 | return NULL; |
| 566 | } |
| 567 | return PyString_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 571 | mmap_slice(mmap_object *self, int ilow, int ihigh) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 572 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 573 | CHECK_VALID(NULL); |
| 574 | if (ilow < 0) |
| 575 | ilow = 0; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 576 | else if ((size_t)ilow > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 577 | ilow = self->size; |
| 578 | if (ihigh < 0) |
| 579 | ihigh = 0; |
| 580 | if (ihigh < ilow) |
| 581 | ihigh = ilow; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 582 | else if ((size_t)ihigh > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 583 | ihigh = self->size; |
| 584 | |
| 585 | return PyString_FromStringAndSize(self->data + ilow, ihigh-ilow); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 589 | mmap_concat(mmap_object *self, PyObject *bb) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 590 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 591 | CHECK_VALID(NULL); |
| 592 | PyErr_SetString(PyExc_SystemError, |
| 593 | "mmaps don't support concatenation"); |
| 594 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 598 | mmap_repeat(mmap_object *self, int n) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 599 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 600 | CHECK_VALID(NULL); |
| 601 | PyErr_SetString(PyExc_SystemError, |
| 602 | "mmaps don't support repeat operation"); |
| 603 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 604 | } |
| 605 | |
| 606 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 607 | mmap_ass_slice(mmap_object *self, int ilow, int ihigh, PyObject *v) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 608 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 609 | const char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 610 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 611 | CHECK_VALID(-1); |
| 612 | if (ilow < 0) |
| 613 | ilow = 0; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 614 | else if ((size_t)ilow > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 615 | ilow = self->size; |
| 616 | if (ihigh < 0) |
| 617 | ihigh = 0; |
| 618 | if (ihigh < ilow) |
| 619 | ihigh = ilow; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 620 | else if ((size_t)ihigh > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 621 | ihigh = self->size; |
| 622 | |
| 623 | if (! (PyString_Check(v)) ) { |
| 624 | PyErr_SetString(PyExc_IndexError, |
| 625 | "mmap slice assignment must be a string"); |
| 626 | return -1; |
| 627 | } |
| 628 | if ( PyString_Size(v) != (ihigh - ilow) ) { |
| 629 | PyErr_SetString(PyExc_IndexError, |
| 630 | "mmap slice assignment is wrong size"); |
| 631 | return -1; |
| 632 | } |
| 633 | buf = PyString_AsString(v); |
| 634 | memcpy(self->data + ilow, buf, ihigh-ilow); |
| 635 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 639 | mmap_ass_item(mmap_object *self, int i, PyObject *v) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 640 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 641 | const char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 642 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 643 | CHECK_VALID(-1); |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 644 | if (i < 0 || (size_t)i >= self->size) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 645 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 646 | return -1; |
| 647 | } |
| 648 | if (! (PyString_Check(v) && PyString_Size(v)==1) ) { |
| 649 | PyErr_SetString(PyExc_IndexError, |
| 650 | "mmap assignment must be single-character string"); |
| 651 | return -1; |
| 652 | } |
| 653 | buf = PyString_AsString(v); |
| 654 | self->data[i] = buf[0]; |
| 655 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | static PySequenceMethods mmap_as_sequence = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 659 | (inquiry)mmap_length, /*sq_length*/ |
| 660 | (binaryfunc)mmap_concat, /*sq_concat*/ |
| 661 | (intargfunc)mmap_repeat, /*sq_repeat*/ |
| 662 | (intargfunc)mmap_item, /*sq_item*/ |
| 663 | (intintargfunc)mmap_slice, /*sq_slice*/ |
| 664 | (intobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 665 | (intintobjargproc)mmap_ass_slice, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 666 | }; |
| 667 | |
| 668 | static PyBufferProcs mmap_as_buffer = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 669 | (getreadbufferproc)mmap_buffer_getreadbuf, |
| 670 | (getwritebufferproc)mmap_buffer_getwritebuf, |
| 671 | (getsegcountproc)mmap_buffer_getsegcount, |
| 672 | (getcharbufferproc)mmap_buffer_getcharbuffer, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 673 | }; |
| 674 | |
| 675 | static PyTypeObject mmap_object_type = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 676 | PyObject_HEAD_INIT(0) /* patched in module init */ |
| 677 | 0, /* ob_size */ |
| 678 | "mmap", /* tp_name */ |
| 679 | sizeof(mmap_object), /* tp_size */ |
| 680 | 0, /* tp_itemsize */ |
| 681 | /* methods */ |
| 682 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 683 | 0, /* tp_print */ |
| 684 | (getattrfunc) mmap_object_getattr, /* tp_getattr */ |
| 685 | 0, /* tp_setattr */ |
| 686 | 0, /* tp_compare */ |
| 687 | 0, /* tp_repr */ |
| 688 | 0, /* tp_as_number */ |
| 689 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 690 | 0, /*tp_as_mapping*/ |
| 691 | 0, /*tp_hash*/ |
| 692 | 0, /*tp_call*/ |
| 693 | 0, /*tp_str*/ |
| 694 | 0, /*tp_getattro*/ |
| 695 | 0, /*tp_setattro*/ |
| 696 | &mmap_as_buffer, /*tp_as_buffer*/ |
| 697 | Py_TPFLAGS_HAVE_GETCHARBUFFER, /*tp_flags*/ |
| 698 | 0, /*tp_doc*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 699 | }; |
| 700 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 701 | |
| 702 | /* extract the map size from the given PyObject |
| 703 | |
| 704 | The map size is restricted to [0, INT_MAX] because this is the current |
| 705 | Python limitation on object sizes. Although the mmap object *could* handle |
| 706 | a larger map size, there is no point because all the useful operations |
| 707 | (len(), slicing(), sequence indexing) are limited by a C int. |
| 708 | |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 709 | Returns -1 on error, with an appropriate Python exception raised. On |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 710 | success, the map size is returned. */ |
| 711 | static int |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 712 | _GetMapSize(PyObject *o) |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 713 | { |
| 714 | if (PyInt_Check(o)) { |
| 715 | long i = PyInt_AsLong(o); |
| 716 | if (PyErr_Occurred()) |
| 717 | return -1; |
| 718 | if (i < 0) |
| 719 | goto onnegoverflow; |
| 720 | if (i > INT_MAX) |
| 721 | goto onposoverflow; |
| 722 | return (int)i; |
| 723 | } |
| 724 | else if (PyLong_Check(o)) { |
| 725 | long i = PyLong_AsLong(o); |
| 726 | if (PyErr_Occurred()) { |
| 727 | /* yes negative overflow is mistaken for positive overflow |
| 728 | but not worth the trouble to check sign of 'i' */ |
| 729 | if (PyErr_ExceptionMatches(PyExc_OverflowError)) |
| 730 | goto onposoverflow; |
| 731 | else |
| 732 | return -1; |
| 733 | } |
| 734 | if (i < 0) |
| 735 | goto onnegoverflow; |
| 736 | if (i > INT_MAX) |
| 737 | goto onposoverflow; |
| 738 | return (int)i; |
| 739 | } |
| 740 | else { |
| 741 | PyErr_SetString(PyExc_TypeError, |
| 742 | "map size must be an integral value"); |
| 743 | return -1; |
| 744 | } |
| 745 | |
| 746 | onnegoverflow: |
| 747 | PyErr_SetString(PyExc_OverflowError, |
| 748 | "memory mapped size must be positive"); |
| 749 | return -1; |
| 750 | |
| 751 | onposoverflow: |
| 752 | PyErr_SetString(PyExc_OverflowError, |
| 753 | "memory mapped size is too large (limited by C int)"); |
| 754 | return -1; |
| 755 | } |
| 756 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 757 | #ifdef UNIX |
| 758 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 759 | new_mmap_object(PyObject *self, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 760 | { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 761 | mmap_object *m_obj; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 762 | PyObject *map_size_obj = NULL; |
| 763 | int map_size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 764 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 765 | char *keywords[] = {"file", "size", "flags", "prot", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 766 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 767 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 768 | "iO|ii", keywords, |
| 769 | &fd, &map_size_obj, &flags, &prot) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 770 | ) |
| 771 | return NULL; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 772 | map_size = _GetMapSize(map_size_obj); |
| 773 | if (map_size < 0) |
| 774 | return NULL; |
| 775 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 776 | m_obj = PyObject_New (mmap_object, &mmap_object_type); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 777 | if (m_obj == NULL) {return NULL;} |
| 778 | m_obj->size = (size_t) map_size; |
| 779 | m_obj->pos = (size_t) 0; |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 780 | m_obj->fd = fd; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 781 | m_obj->data = mmap(NULL, map_size, |
| 782 | prot, flags, |
| 783 | fd, 0); |
| 784 | if (m_obj->data == (void *)-1) |
| 785 | { |
| 786 | Py_DECREF(m_obj); |
| 787 | PyErr_SetFromErrno(mmap_module_error); |
| 788 | return NULL; |
| 789 | } |
| 790 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 791 | } |
| 792 | #endif /* UNIX */ |
| 793 | |
| 794 | #ifdef MS_WIN32 |
| 795 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 796 | new_mmap_object(PyObject *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 797 | { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 798 | mmap_object *m_obj; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 799 | PyObject *map_size_obj = NULL; |
| 800 | int map_size; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 801 | char *tagname = ""; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 802 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 803 | DWORD dwErr = 0; |
| 804 | int fileno; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 805 | INT_PTR fh = 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 806 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 807 | /* Patch the object type */ |
| 808 | mmap_object_type.ob_type = &PyType_Type; |
| 809 | |
| 810 | if (!PyArg_ParseTuple(args, |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 811 | "iO|z", |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 812 | &fileno, |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 813 | &map_size_obj, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 814 | &tagname) |
| 815 | ) |
| 816 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 817 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 818 | map_size = _GetMapSize(map_size_obj); |
| 819 | if (map_size < 0) |
| 820 | return NULL; |
| 821 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 822 | /* if an actual filename has been specified */ |
| 823 | if (fileno != 0) { |
| 824 | fh = _get_osfhandle(fileno); |
| 825 | if (fh==-1) { |
| 826 | PyErr_SetFromErrno(mmap_module_error); |
| 827 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 828 | } |
Fred Drake | 1ef4e2d | 2000-04-05 14:15:31 +0000 | [diff] [blame] | 829 | /* Win9x appears to need us seeked to zero */ |
| 830 | fseek(&_iob[fileno], 0, SEEK_SET); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 831 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 832 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 833 | m_obj = PyObject_New (mmap_object, &mmap_object_type); |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame^] | 834 | if (m_obj==NULL) |
| 835 | return NULL; |
| 836 | /* Set every field to an invalid marker, so we can safely |
| 837 | destruct the object in the face of failure */ |
| 838 | m_obj->data = NULL; |
| 839 | m_obj->file_handle = (INT_PTR)INVALID_HANDLE_VALUE; |
| 840 | m_obj->map_handle = INVALID_HANDLE_VALUE; |
| 841 | m_obj->tagname = NULL; |
| 842 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 843 | if (fh) { |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame^] | 844 | /* It is necessary to duplicate the handle, so the |
| 845 | Python code can close it on us */ |
| 846 | if (!DuplicateHandle( |
| 847 | GetCurrentProcess(), /* source process handle */ |
| 848 | (HANDLE)fh, /* handle to be duplicated */ |
| 849 | GetCurrentProcess(), /* target proc handle */ |
| 850 | (LPHANDLE)&m_obj->file_handle, /* result */ |
| 851 | 0, /* access - ignored due to options value */ |
| 852 | FALSE, /* inherited by child processes? */ |
| 853 | DUPLICATE_SAME_ACCESS)) { /* options */ |
| 854 | dwErr = GetLastError(); |
| 855 | Py_DECREF(m_obj); |
| 856 | PyErr_SetFromWindowsErr(dwErr); |
| 857 | return NULL; |
| 858 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 859 | if (!map_size) { |
| 860 | m_obj->size = GetFileSize ((HANDLE)fh, NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 861 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 862 | m_obj->size = map_size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 863 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 864 | } |
| 865 | else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 866 | m_obj->size = map_size; |
| 867 | } |
| 868 | |
| 869 | /* set the initial position */ |
| 870 | m_obj->pos = (size_t) 0; |
| 871 | |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame^] | 872 | /* set the tag name */ |
| 873 | if (tagname != NULL) { |
| 874 | m_obj->tagname = PyMem_Malloc(strlen(tagname)+1); |
| 875 | if (m_obj->tagname == NULL) { |
| 876 | PyErr_NoMemory(); |
| 877 | Py_DECREF(m_obj); |
| 878 | return NULL; |
| 879 | } |
| 880 | strcpy(m_obj->tagname, tagname); |
| 881 | } |
| 882 | else |
| 883 | m_obj->tagname = NULL; |
| 884 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 885 | m_obj->map_handle = CreateFileMapping ((HANDLE) m_obj->file_handle, |
| 886 | NULL, |
| 887 | PAGE_READWRITE, |
| 888 | 0, |
| 889 | m_obj->size, |
| 890 | tagname); |
| 891 | if (m_obj->map_handle != NULL) { |
| 892 | m_obj->data = (char *) MapViewOfFile (m_obj->map_handle, |
| 893 | FILE_MAP_WRITE, |
| 894 | 0, |
| 895 | 0, |
| 896 | 0); |
| 897 | if (m_obj->data != NULL) { |
| 898 | return ((PyObject *) m_obj); |
| 899 | } else { |
| 900 | dwErr = GetLastError(); |
| 901 | } |
| 902 | } else { |
| 903 | dwErr = GetLastError(); |
| 904 | } |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame^] | 905 | Py_DECREF(m_obj); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 906 | PyErr_SetFromWindowsErr(dwErr); |
| 907 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 908 | } |
| 909 | #endif /* MS_WIN32 */ |
| 910 | |
| 911 | /* List of functions exported by this module */ |
| 912 | static struct PyMethodDef mmap_functions[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 913 | {"mmap", (PyCFunction) new_mmap_object, |
| 914 | METH_VARARGS|METH_KEYWORDS}, |
| 915 | {NULL, NULL} /* Sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 916 | }; |
| 917 | |
| 918 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 919 | __declspec(dllexport) void |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 920 | #endif /* MS_WIN32 */ |
| 921 | #ifdef UNIX |
| 922 | extern void |
| 923 | #endif |
| 924 | |
| 925 | initmmap(void) |
| 926 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 927 | PyObject *dict, *module; |
| 928 | module = Py_InitModule ("mmap", mmap_functions); |
| 929 | dict = PyModule_GetDict (module); |
| 930 | mmap_module_error = PyExc_EnvironmentError; |
| 931 | Py_INCREF(mmap_module_error); |
| 932 | PyDict_SetItemString (dict, "error", mmap_module_error); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 933 | #ifdef PROT_EXEC |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 934 | PyDict_SetItemString (dict, "PROT_EXEC", PyInt_FromLong(PROT_EXEC) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 935 | #endif |
| 936 | #ifdef PROT_READ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 937 | PyDict_SetItemString (dict, "PROT_READ", PyInt_FromLong(PROT_READ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 938 | #endif |
| 939 | #ifdef PROT_WRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 940 | PyDict_SetItemString (dict, "PROT_WRITE", PyInt_FromLong(PROT_WRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 941 | #endif |
| 942 | |
| 943 | #ifdef MAP_SHARED |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 944 | PyDict_SetItemString (dict, "MAP_SHARED", PyInt_FromLong(MAP_SHARED) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 945 | #endif |
| 946 | #ifdef MAP_PRIVATE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 947 | PyDict_SetItemString (dict, "MAP_PRIVATE", |
| 948 | PyInt_FromLong(MAP_PRIVATE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 949 | #endif |
| 950 | #ifdef MAP_DENYWRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 951 | PyDict_SetItemString (dict, "MAP_DENYWRITE", |
| 952 | PyInt_FromLong(MAP_DENYWRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 953 | #endif |
| 954 | #ifdef MAP_EXECUTABLE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 955 | PyDict_SetItemString (dict, "MAP_EXECUTABLE", |
| 956 | PyInt_FromLong(MAP_EXECUTABLE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 957 | #endif |
| 958 | #ifdef MAP_ANON |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 959 | PyDict_SetItemString (dict, "MAP_ANON", PyInt_FromLong(MAP_ANON) ); |
| 960 | PyDict_SetItemString (dict, "MAP_ANONYMOUS", |
| 961 | PyInt_FromLong(MAP_ANON) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 962 | #endif |
| 963 | |
| 964 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 965 | PyDict_SetItemString (dict, "PAGESIZE", |
| 966 | PyInt_FromLong( (long)getpagesize() ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 967 | #endif |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 968 | #ifdef MS_WIN32 |
| 969 | { |
| 970 | SYSTEM_INFO si; |
| 971 | GetSystemInfo(&si); |
| 972 | PyDict_SetItemString (dict, "PAGESIZE", |
| 973 | PyInt_FromLong( si.dwPageSize ) ); |
| 974 | } |
| 975 | #endif /* MS_WIN32 */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 976 | |
| 977 | } |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 978 | |