Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 1 | |
| 2 | /* Memoryview object implementation */ |
| 3 | |
| 4 | #include "Python.h" |
| 5 | |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 6 | static Py_ssize_t |
| 7 | get_shape0(Py_buffer *buf) |
| 8 | { |
| 9 | if (buf->shape != NULL) |
| 10 | return buf->shape[0]; |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 11 | if (buf->ndim == 0) |
| 12 | return 1; |
| 13 | PyErr_SetString(PyExc_TypeError, |
| 14 | "exported buffer does not have any shape information associated " |
| 15 | "to it"); |
| 16 | return -1; |
| 17 | } |
| 18 | |
| 19 | static void |
| 20 | dup_buffer(Py_buffer *dest, Py_buffer *src) |
| 21 | { |
| 22 | *dest = *src; |
| 23 | if (src->ndim == 1 && src->shape != NULL) { |
| 24 | dest->shape = &(dest->smalltable[0]); |
| 25 | dest->shape[0] = get_shape0(src); |
| 26 | } |
| 27 | if (src->ndim == 1 && src->strides != NULL) { |
| 28 | dest->strides = &(dest->smalltable[1]); |
| 29 | dest->strides[0] = src->strides[0]; |
| 30 | } |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 31 | } |
| 32 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 33 | static int |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 34 | memory_getbuf(PyMemoryViewObject *self, Py_buffer *view, int flags) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 35 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 36 | int res = 0; |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 37 | if (self->view.obj != NULL) |
| 38 | res = PyObject_GetBuffer(self->view.obj, view, flags); |
| 39 | if (view) |
| 40 | dup_buffer(view, &self->view); |
| 41 | return res; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | static void |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 45 | memory_releasebuf(PyMemoryViewObject *self, Py_buffer *view) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 46 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 47 | PyBuffer_Release(view); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | PyDoc_STRVAR(memory_doc, |
| 51 | "memoryview(object)\n\ |
| 52 | \n\ |
| 53 | Create a new memoryview object which references the given object."); |
| 54 | |
| 55 | PyObject * |
Antoine Pitrou | ee58fa4 | 2008-08-19 18:22:14 +0000 | [diff] [blame] | 56 | PyMemoryView_FromBuffer(Py_buffer *info) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 57 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 58 | PyMemoryViewObject *mview; |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 59 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 60 | mview = (PyMemoryViewObject *) |
| 61 | PyObject_GC_New(PyMemoryViewObject, &PyMemoryView_Type); |
| 62 | if (mview == NULL) |
| 63 | return NULL; |
| 64 | mview->base = NULL; |
| 65 | dup_buffer(&mview->view, info); |
| 66 | /* NOTE: mview->view.obj should already have been incref'ed as |
| 67 | part of PyBuffer_FillInfo(). */ |
| 68 | _PyObject_GC_TRACK(mview); |
| 69 | return (PyObject *)mview; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | PyObject * |
| 73 | PyMemoryView_FromObject(PyObject *base) |
| 74 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 75 | PyMemoryViewObject *mview; |
Antoine Pitrou | 9336818 | 2010-02-02 22:51:34 +0000 | [diff] [blame] | 76 | Py_buffer view; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 77 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 78 | if (!PyObject_CheckBuffer(base)) { |
| 79 | PyErr_SetString(PyExc_TypeError, |
| 80 | "cannot make memory view because object does " |
| 81 | "not have the buffer interface"); |
| 82 | return NULL; |
| 83 | } |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 84 | |
Antoine Pitrou | 9336818 | 2010-02-02 22:51:34 +0000 | [diff] [blame] | 85 | if (PyObject_GetBuffer(base, &view, PyBUF_FULL_RO) < 0) |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 86 | return NULL; |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 87 | |
Antoine Pitrou | 9336818 | 2010-02-02 22:51:34 +0000 | [diff] [blame] | 88 | mview = (PyMemoryViewObject *)PyMemoryView_FromBuffer(&view); |
| 89 | if (mview == NULL) { |
| 90 | PyBuffer_Release(&view); |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 91 | return NULL; |
| 92 | } |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 93 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 94 | mview->base = base; |
| 95 | Py_INCREF(base); |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 96 | return (PyObject *)mview; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | static PyObject * |
| 100 | memory_new(PyTypeObject *subtype, PyObject *args, PyObject *kwds) |
| 101 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 102 | PyObject *obj; |
| 103 | static char *kwlist[] = {"object", 0}; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 104 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 105 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:memoryview", kwlist, |
| 106 | &obj)) { |
| 107 | return NULL; |
| 108 | } |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 109 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 110 | return PyMemoryView_FromObject(obj); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | |
| 114 | static void |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 115 | _strided_copy_nd(char *dest, char *src, int nd, Py_ssize_t *shape, |
Neal Norwitz | 61ec0d3 | 2007-10-26 06:44:10 +0000 | [diff] [blame] | 116 | Py_ssize_t *strides, Py_ssize_t itemsize, char fort) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 117 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 118 | int k; |
| 119 | Py_ssize_t outstride; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 120 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 121 | if (nd==0) { |
| 122 | memcpy(dest, src, itemsize); |
| 123 | } |
| 124 | else if (nd == 1) { |
| 125 | for (k = 0; k<shape[0]; k++) { |
| 126 | memcpy(dest, src, itemsize); |
| 127 | dest += itemsize; |
| 128 | src += strides[0]; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 129 | } |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 130 | } |
| 131 | else { |
| 132 | if (fort == 'F') { |
| 133 | /* Copy first dimension first, |
| 134 | second dimension second, etc... |
| 135 | Set up the recursive loop backwards so that final |
| 136 | dimension is actually copied last. |
| 137 | */ |
| 138 | outstride = itemsize; |
| 139 | for (k=1; k<nd-1;k++) { |
| 140 | outstride *= shape[k]; |
| 141 | } |
| 142 | for (k=0; k<shape[nd-1]; k++) { |
| 143 | _strided_copy_nd(dest, src, nd-1, shape, |
| 144 | strides, itemsize, fort); |
| 145 | dest += outstride; |
| 146 | src += strides[nd-1]; |
| 147 | } |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 148 | } |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 149 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 150 | else { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 151 | /* Copy last dimension first, |
| 152 | second-to-last dimension second, etc. |
| 153 | Set up the recursion so that the |
| 154 | first dimension is copied last |
| 155 | */ |
| 156 | outstride = itemsize; |
| 157 | for (k=1; k < nd; k++) { |
| 158 | outstride *= shape[k]; |
| 159 | } |
| 160 | for (k=0; k<shape[0]; k++) { |
| 161 | _strided_copy_nd(dest, src, nd-1, shape+1, |
| 162 | strides+1, itemsize, |
| 163 | fort); |
| 164 | dest += outstride; |
| 165 | src += strides[0]; |
| 166 | } |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 167 | } |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 168 | } |
| 169 | return; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 172 | static int |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 173 | _indirect_copy_nd(char *dest, Py_buffer *view, char fort) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 174 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 175 | Py_ssize_t *indices; |
| 176 | int k; |
| 177 | Py_ssize_t elements; |
| 178 | char *ptr; |
Antoine Pitrou | f43f65b | 2010-09-01 21:16:10 +0000 | [diff] [blame] | 179 | void (*func)(int, Py_ssize_t *, const Py_ssize_t *); |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 180 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 181 | if (view->ndim > PY_SSIZE_T_MAX / sizeof(Py_ssize_t)) { |
| 182 | PyErr_NoMemory(); |
| 183 | return -1; |
| 184 | } |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 185 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 186 | indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*view->ndim); |
| 187 | if (indices == NULL) { |
| 188 | PyErr_NoMemory(); |
| 189 | return -1; |
| 190 | } |
| 191 | for (k=0; k<view->ndim;k++) { |
| 192 | indices[k] = 0; |
| 193 | } |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 194 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 195 | elements = 1; |
| 196 | for (k=0; k<view->ndim; k++) { |
| 197 | elements *= view->shape[k]; |
| 198 | } |
| 199 | if (fort == 'F') { |
Antoine Pitrou | b83df8f | 2010-09-01 13:01:35 +0000 | [diff] [blame] | 200 | func = _Py_add_one_to_index_F; |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 201 | } |
| 202 | else { |
Antoine Pitrou | b83df8f | 2010-09-01 13:01:35 +0000 | [diff] [blame] | 203 | func = _Py_add_one_to_index_C; |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 204 | } |
| 205 | while (elements--) { |
| 206 | func(view->ndim, indices, view->shape); |
| 207 | ptr = PyBuffer_GetPointer(view, indices); |
| 208 | memcpy(dest, ptr, view->itemsize); |
| 209 | dest += view->itemsize; |
| 210 | } |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 211 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 212 | PyMem_Free(indices); |
| 213 | return 0; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 214 | } |
| 215 | |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 216 | /* |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 217 | Get a the data from an object as a contiguous chunk of memory (in |
| 218 | either 'C' or 'F'ortran order) even if it means copying it into a |
| 219 | separate memory area. |
| 220 | |
| 221 | Returns a new reference to a Memory view object. If no copy is needed, |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 222 | the memory view object points to the original memory and holds a |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 223 | lock on the original. If a copy is needed, then the memory view object |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 224 | points to a brand-new Bytes object (and holds a memory lock on it). |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 225 | |
| 226 | buffertype |
| 227 | |
| 228 | PyBUF_READ buffer only needs to be read-only |
Sean Reifscheider | 54cf12b | 2007-09-17 17:55:36 +0000 | [diff] [blame] | 229 | PyBUF_WRITE buffer needs to be writable (give error if not contiguous) |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 230 | PyBUF_SHADOW buffer needs to be writable so shadow it with |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 231 | a contiguous buffer if it is not. The view will point to |
| 232 | the shadow buffer which can be written to and then |
| 233 | will be copied back into the other buffer when the memory |
Antoine Pitrou | 2f89aa6 | 2008-08-02 21:02:48 +0000 | [diff] [blame] | 234 | view is de-allocated. While the shadow buffer is |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 235 | being used, it will have an exclusive write lock on |
| 236 | the original buffer. |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 237 | */ |
| 238 | |
| 239 | PyObject * |
| 240 | PyMemoryView_GetContiguous(PyObject *obj, int buffertype, char fort) |
| 241 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 242 | PyMemoryViewObject *mem; |
| 243 | PyObject *bytes; |
| 244 | Py_buffer *view; |
| 245 | int flags; |
| 246 | char *dest; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 247 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 248 | if (!PyObject_CheckBuffer(obj)) { |
| 249 | PyErr_SetString(PyExc_TypeError, |
Georg Brandl | c5605df | 2009-08-13 08:26:44 +0000 | [diff] [blame] | 250 | "object does not support the buffer interface"); |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 251 | return NULL; |
| 252 | } |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 253 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 254 | mem = PyObject_GC_New(PyMemoryViewObject, &PyMemoryView_Type); |
| 255 | if (mem == NULL) |
| 256 | return NULL; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 257 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 258 | view = &mem->view; |
| 259 | flags = PyBUF_FULL_RO; |
| 260 | switch(buffertype) { |
| 261 | case PyBUF_WRITE: |
| 262 | flags = PyBUF_FULL; |
| 263 | break; |
| 264 | } |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 265 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 266 | if (PyObject_GetBuffer(obj, view, flags) != 0) { |
| 267 | Py_DECREF(mem); |
| 268 | return NULL; |
| 269 | } |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 270 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 271 | if (PyBuffer_IsContiguous(view, fort)) { |
| 272 | /* no copy needed */ |
| 273 | Py_INCREF(obj); |
| 274 | mem->base = obj; |
| 275 | _PyObject_GC_TRACK(mem); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 276 | return (PyObject *)mem; |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 277 | } |
| 278 | /* otherwise a copy is needed */ |
| 279 | if (buffertype == PyBUF_WRITE) { |
| 280 | Py_DECREF(mem); |
| 281 | PyErr_SetString(PyExc_BufferError, |
| 282 | "writable contiguous buffer requested " |
| 283 | "for a non-contiguousobject."); |
| 284 | return NULL; |
| 285 | } |
| 286 | bytes = PyBytes_FromStringAndSize(NULL, view->len); |
| 287 | if (bytes == NULL) { |
| 288 | Py_DECREF(mem); |
| 289 | return NULL; |
| 290 | } |
| 291 | dest = PyBytes_AS_STRING(bytes); |
| 292 | /* different copying strategy depending on whether |
| 293 | or not any pointer de-referencing is needed |
| 294 | */ |
| 295 | /* strided or in-direct copy */ |
| 296 | if (view->suboffsets==NULL) { |
| 297 | _strided_copy_nd(dest, view->buf, view->ndim, view->shape, |
| 298 | view->strides, view->itemsize, fort); |
| 299 | } |
| 300 | else { |
| 301 | if (_indirect_copy_nd(dest, view, fort) < 0) { |
| 302 | Py_DECREF(bytes); |
| 303 | Py_DECREF(mem); |
| 304 | return NULL; |
| 305 | } |
| 306 | } |
| 307 | if (buffertype == PyBUF_SHADOW) { |
| 308 | /* return a shadowed memory-view object */ |
| 309 | view->buf = dest; |
| 310 | mem->base = PyTuple_Pack(2, obj, bytes); |
| 311 | Py_DECREF(bytes); |
| 312 | if (mem->base == NULL) { |
| 313 | Py_DECREF(mem); |
| 314 | return NULL; |
| 315 | } |
| 316 | } |
| 317 | else { |
| 318 | PyBuffer_Release(view); /* XXX ? */ |
| 319 | /* steal the reference */ |
| 320 | mem->base = bytes; |
| 321 | } |
| 322 | _PyObject_GC_TRACK(mem); |
| 323 | return (PyObject *)mem; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | |
| 327 | static PyObject * |
| 328 | memory_format_get(PyMemoryViewObject *self) |
| 329 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 330 | return PyUnicode_FromString(self->view.format); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | static PyObject * |
| 334 | memory_itemsize_get(PyMemoryViewObject *self) |
| 335 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 336 | return PyLong_FromSsize_t(self->view.itemsize); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | static PyObject * |
| 340 | _IntTupleFromSsizet(int len, Py_ssize_t *vals) |
| 341 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 342 | int i; |
| 343 | PyObject *o; |
| 344 | PyObject *intTuple; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 345 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 346 | if (vals == NULL) { |
| 347 | Py_INCREF(Py_None); |
| 348 | return Py_None; |
| 349 | } |
| 350 | intTuple = PyTuple_New(len); |
| 351 | if (!intTuple) return NULL; |
| 352 | for(i=0; i<len; i++) { |
| 353 | o = PyLong_FromSsize_t(vals[i]); |
| 354 | if (!o) { |
| 355 | Py_DECREF(intTuple); |
| 356 | return NULL; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 357 | } |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 358 | PyTuple_SET_ITEM(intTuple, i, o); |
| 359 | } |
| 360 | return intTuple; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | static PyObject * |
| 364 | memory_shape_get(PyMemoryViewObject *self) |
| 365 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 366 | return _IntTupleFromSsizet(self->view.ndim, self->view.shape); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | static PyObject * |
| 370 | memory_strides_get(PyMemoryViewObject *self) |
| 371 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 372 | return _IntTupleFromSsizet(self->view.ndim, self->view.strides); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | static PyObject * |
| 376 | memory_suboffsets_get(PyMemoryViewObject *self) |
| 377 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 378 | return _IntTupleFromSsizet(self->view.ndim, self->view.suboffsets); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | static PyObject * |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 382 | memory_readonly_get(PyMemoryViewObject *self) |
| 383 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 384 | return PyBool_FromLong(self->view.readonly); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | static PyObject * |
| 388 | memory_ndim_get(PyMemoryViewObject *self) |
| 389 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 390 | return PyLong_FromLong(self->view.ndim); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 391 | } |
| 392 | |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 393 | static PyGetSetDef memory_getsetlist[] ={ |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 394 | {"format", (getter)memory_format_get, NULL, NULL}, |
| 395 | {"itemsize", (getter)memory_itemsize_get, NULL, NULL}, |
| 396 | {"shape", (getter)memory_shape_get, NULL, NULL}, |
| 397 | {"strides", (getter)memory_strides_get, NULL, NULL}, |
| 398 | {"suboffsets", (getter)memory_suboffsets_get, NULL, NULL}, |
| 399 | {"readonly", (getter)memory_readonly_get, NULL, NULL}, |
| 400 | {"ndim", (getter)memory_ndim_get, NULL, NULL}, |
| 401 | {NULL, NULL, NULL, NULL}, |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 402 | }; |
| 403 | |
| 404 | |
| 405 | static PyObject * |
Neal Norwitz | faa54a3 | 2007-08-19 04:23:20 +0000 | [diff] [blame] | 406 | memory_tobytes(PyMemoryViewObject *mem, PyObject *noargs) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 407 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 408 | return PyObject_CallFunctionObjArgs( |
| 409 | (PyObject *) &PyBytes_Type, mem, NULL); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 410 | } |
| 411 | |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 412 | /* TODO: rewrite this function using the struct module to unpack |
| 413 | each buffer item */ |
| 414 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 415 | static PyObject * |
Neal Norwitz | faa54a3 | 2007-08-19 04:23:20 +0000 | [diff] [blame] | 416 | memory_tolist(PyMemoryViewObject *mem, PyObject *noargs) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 417 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 418 | Py_buffer *view = &(mem->view); |
| 419 | Py_ssize_t i; |
| 420 | PyObject *res, *item; |
| 421 | char *buf; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 422 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 423 | if (strcmp(view->format, "B") || view->itemsize != 1) { |
| 424 | PyErr_SetString(PyExc_NotImplementedError, |
| 425 | "tolist() only supports byte views"); |
| 426 | return NULL; |
| 427 | } |
| 428 | if (view->ndim != 1) { |
| 429 | PyErr_SetString(PyExc_NotImplementedError, |
| 430 | "tolist() only supports one-dimensional objects"); |
| 431 | return NULL; |
| 432 | } |
| 433 | res = PyList_New(view->len); |
| 434 | if (res == NULL) |
| 435 | return NULL; |
| 436 | buf = view->buf; |
| 437 | for (i = 0; i < view->len; i++) { |
| 438 | item = PyLong_FromUnsignedLong((unsigned char) *buf); |
| 439 | if (item == NULL) { |
| 440 | Py_DECREF(res); |
| 441 | return NULL; |
| 442 | } |
| 443 | PyList_SET_ITEM(res, i, item); |
| 444 | buf++; |
| 445 | } |
| 446 | return res; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 449 | static PyMethodDef memory_methods[] = { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 450 | {"tobytes", (PyCFunction)memory_tobytes, METH_NOARGS, NULL}, |
| 451 | {"tolist", (PyCFunction)memory_tolist, METH_NOARGS, NULL}, |
| 452 | {NULL, NULL} /* sentinel */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 453 | }; |
| 454 | |
| 455 | |
| 456 | static void |
| 457 | memory_dealloc(PyMemoryViewObject *self) |
| 458 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 459 | _PyObject_GC_UNTRACK(self); |
| 460 | if (self->view.obj != NULL) { |
| 461 | if (self->base && PyTuple_Check(self->base)) { |
| 462 | /* Special case when first element is generic object |
| 463 | with buffer interface and the second element is a |
| 464 | contiguous "shadow" that must be copied back into |
| 465 | the data areay of the first tuple element before |
| 466 | releasing the buffer on the first element. |
| 467 | */ |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 468 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 469 | PyObject_CopyData(PyTuple_GET_ITEM(self->base,0), |
| 470 | PyTuple_GET_ITEM(self->base,1)); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 471 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 472 | /* The view member should have readonly == -1 in |
| 473 | this instance indicating that the memory can |
| 474 | be "locked" and was locked and will be unlocked |
| 475 | again after this call. |
| 476 | */ |
| 477 | PyBuffer_Release(&(self->view)); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 478 | } |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 479 | else { |
| 480 | PyBuffer_Release(&(self->view)); |
| 481 | } |
| 482 | Py_CLEAR(self->base); |
| 483 | } |
| 484 | PyObject_GC_Del(self); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | static PyObject * |
| 488 | memory_repr(PyMemoryViewObject *self) |
| 489 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 490 | return PyUnicode_FromFormat("<memory at %p>", self); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 491 | } |
| 492 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 493 | /* Sequence methods */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 494 | static Py_ssize_t |
| 495 | memory_length(PyMemoryViewObject *self) |
| 496 | { |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 497 | return get_shape0(&self->view); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 498 | } |
| 499 | |
Raymond Hettinger | 159eac9 | 2009-06-23 20:38:54 +0000 | [diff] [blame] | 500 | /* Alternate version of memory_subcript that only accepts indices. |
| 501 | Used by PySeqIter_New(). |
| 502 | */ |
| 503 | static PyObject * |
| 504 | memory_item(PyMemoryViewObject *self, Py_ssize_t result) |
| 505 | { |
| 506 | Py_buffer *view = &(self->view); |
| 507 | |
| 508 | if (view->ndim == 0) { |
| 509 | PyErr_SetString(PyExc_IndexError, |
| 510 | "invalid indexing of 0-dim memory"); |
| 511 | return NULL; |
| 512 | } |
| 513 | if (view->ndim == 1) { |
| 514 | /* Return a bytes object */ |
| 515 | char *ptr; |
| 516 | ptr = (char *)view->buf; |
| 517 | if (result < 0) { |
| 518 | result += get_shape0(view); |
| 519 | } |
| 520 | if ((result < 0) || (result >= get_shape0(view))) { |
| 521 | PyErr_SetString(PyExc_IndexError, |
| 522 | "index out of bounds"); |
| 523 | return NULL; |
| 524 | } |
| 525 | if (view->strides == NULL) |
| 526 | ptr += view->itemsize * result; |
| 527 | else |
| 528 | ptr += view->strides[0] * result; |
| 529 | if (view->suboffsets != NULL && |
| 530 | view->suboffsets[0] >= 0) { |
| 531 | ptr = *((char **)ptr) + view->suboffsets[0]; |
| 532 | } |
| 533 | return PyBytes_FromStringAndSize(ptr, view->itemsize); |
| 534 | } else { |
| 535 | /* Return a new memory-view object */ |
| 536 | Py_buffer newview; |
| 537 | memset(&newview, 0, sizeof(newview)); |
| 538 | /* XXX: This needs to be fixed so it actually returns a sub-view */ |
| 539 | return PyMemoryView_FromBuffer(&newview); |
| 540 | } |
| 541 | } |
| 542 | |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 543 | /* |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 544 | mem[obj] returns a bytes object holding the data for one element if |
| 545 | obj fully indexes the memory view or another memory-view object |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 546 | if it does not. |
Guido van Rossum | 5dde61d | 2007-09-25 22:10:05 +0000 | [diff] [blame] | 547 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 548 | 0-d memory-view objects can be referenced using ... or () but |
| 549 | not with anything else. |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 550 | */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 551 | static PyObject * |
| 552 | memory_subscript(PyMemoryViewObject *self, PyObject *key) |
| 553 | { |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 554 | Py_buffer *view; |
| 555 | view = &(self->view); |
| 556 | |
| 557 | if (view->ndim == 0) { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 558 | if (key == Py_Ellipsis || |
| 559 | (PyTuple_Check(key) && PyTuple_GET_SIZE(key)==0)) { |
| 560 | Py_INCREF(self); |
| 561 | return (PyObject *)self; |
| 562 | } |
| 563 | else { |
| 564 | PyErr_SetString(PyExc_IndexError, |
| 565 | "invalid indexing of 0-dim memory"); |
| 566 | return NULL; |
| 567 | } |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 568 | } |
| 569 | if (PyIndex_Check(key)) { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 570 | Py_ssize_t result; |
| 571 | result = PyNumber_AsSsize_t(key, NULL); |
| 572 | if (result == -1 && PyErr_Occurred()) |
| 573 | return NULL; |
Raymond Hettinger | 159eac9 | 2009-06-23 20:38:54 +0000 | [diff] [blame] | 574 | return memory_item(self, result); |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 575 | } |
| 576 | else if (PySlice_Check(key)) { |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 577 | Py_ssize_t start, stop, step, slicelength; |
| 578 | |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 579 | if (PySlice_GetIndicesEx((PySliceObject*)key, get_shape0(view), |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 580 | &start, &stop, &step, &slicelength) < 0) { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 581 | return NULL; |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 582 | } |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 583 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 584 | if (step == 1 && view->ndim == 1) { |
| 585 | Py_buffer newview; |
| 586 | void *newbuf = (char *) view->buf |
| 587 | + start * view->itemsize; |
| 588 | int newflags = view->readonly |
| 589 | ? PyBUF_CONTIG_RO : PyBUF_CONTIG; |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 590 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 591 | /* XXX There should be an API to create a subbuffer */ |
| 592 | if (view->obj != NULL) { |
| 593 | if (PyObject_GetBuffer(view->obj, &newview, newflags) == -1) |
| 594 | return NULL; |
| 595 | } |
| 596 | else { |
| 597 | newview = *view; |
| 598 | } |
| 599 | newview.buf = newbuf; |
| 600 | newview.len = slicelength * newview.itemsize; |
| 601 | newview.format = view->format; |
| 602 | newview.shape = &(newview.smalltable[0]); |
| 603 | newview.shape[0] = slicelength; |
| 604 | newview.strides = &(newview.itemsize); |
| 605 | return PyMemoryView_FromBuffer(&newview); |
| 606 | } |
| 607 | PyErr_SetNone(PyExc_NotImplementedError); |
| 608 | return NULL; |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 609 | } |
| 610 | PyErr_Format(PyExc_TypeError, |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 611 | "cannot index memory using \"%.200s\"", |
| 612 | key->ob_type->tp_name); |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 613 | return NULL; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 614 | } |
| 615 | |
Travis E. Oliphant | fe9bed0 | 2007-10-12 23:27:53 +0000 | [diff] [blame] | 616 | |
| 617 | /* Need to support assigning memory if we can */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 618 | static int |
| 619 | memory_ass_sub(PyMemoryViewObject *self, PyObject *key, PyObject *value) |
| 620 | { |
Antoine Pitrou | dedbbe6 | 2010-07-11 12:15:03 +0000 | [diff] [blame] | 621 | Py_ssize_t start, len, bytelen; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 622 | Py_buffer srcview; |
| 623 | Py_buffer *view = &(self->view); |
| 624 | char *srcbuf, *destbuf; |
| 625 | |
| 626 | if (view->readonly) { |
| 627 | PyErr_SetString(PyExc_TypeError, |
| 628 | "cannot modify read-only memory"); |
| 629 | return -1; |
| 630 | } |
Antoine Pitrou | f43f65b | 2010-09-01 21:16:10 +0000 | [diff] [blame] | 631 | if (value == NULL) { |
| 632 | PyErr_SetString(PyExc_TypeError, |
| 633 | "cannot delete memory"); |
| 634 | return -1; |
| 635 | } |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 636 | if (view->ndim != 1) { |
| 637 | PyErr_SetNone(PyExc_NotImplementedError); |
| 638 | return -1; |
| 639 | } |
| 640 | if (PyIndex_Check(key)) { |
| 641 | start = PyNumber_AsSsize_t(key, NULL); |
| 642 | if (start == -1 && PyErr_Occurred()) |
| 643 | return -1; |
| 644 | if (start < 0) { |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 645 | start += get_shape0(view); |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 646 | } |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 647 | if ((start < 0) || (start >= get_shape0(view))) { |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 648 | PyErr_SetString(PyExc_IndexError, |
| 649 | "index out of bounds"); |
| 650 | return -1; |
| 651 | } |
| 652 | len = 1; |
| 653 | } |
| 654 | else if (PySlice_Check(key)) { |
| 655 | Py_ssize_t stop, step; |
| 656 | |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 657 | if (PySlice_GetIndicesEx((PySliceObject*)key, get_shape0(view), |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 658 | &start, &stop, &step, &len) < 0) { |
| 659 | return -1; |
| 660 | } |
| 661 | if (step != 1) { |
| 662 | PyErr_SetNone(PyExc_NotImplementedError); |
| 663 | return -1; |
| 664 | } |
| 665 | } |
| 666 | else { |
| 667 | PyErr_Format(PyExc_TypeError, |
| 668 | "cannot index memory using \"%.200s\"", |
| 669 | key->ob_type->tp_name); |
| 670 | return -1; |
| 671 | } |
| 672 | if (PyObject_GetBuffer(value, &srcview, PyBUF_CONTIG_RO) == -1) { |
| 673 | return -1; |
| 674 | } |
| 675 | /* XXX should we allow assignment of different item sizes |
| 676 | as long as the byte length is the same? |
| 677 | (e.g. assign 2 shorts to a 4-byte slice) */ |
| 678 | if (srcview.itemsize != view->itemsize) { |
| 679 | PyErr_Format(PyExc_TypeError, |
| 680 | "mismatching item sizes for \"%.200s\" and \"%.200s\"", |
| 681 | view->obj->ob_type->tp_name, srcview.obj->ob_type->tp_name); |
| 682 | goto _error; |
| 683 | } |
Antoine Pitrou | bc42040 | 2008-12-07 20:14:49 +0000 | [diff] [blame] | 684 | bytelen = len * view->itemsize; |
| 685 | if (bytelen != srcview.len) { |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 686 | PyErr_SetString(PyExc_ValueError, |
| 687 | "cannot modify size of memoryview object"); |
| 688 | goto _error; |
| 689 | } |
| 690 | /* Do the actual copy */ |
| 691 | destbuf = (char *) view->buf + start * view->itemsize; |
| 692 | srcbuf = (char *) srcview.buf; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 693 | if (destbuf + bytelen < srcbuf || srcbuf + bytelen < destbuf) |
| 694 | /* No overlapping */ |
| 695 | memcpy(destbuf, srcbuf, bytelen); |
Antoine Pitrou | dedbbe6 | 2010-07-11 12:15:03 +0000 | [diff] [blame] | 696 | else |
| 697 | memmove(destbuf, srcbuf, bytelen); |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 698 | |
| 699 | PyBuffer_Release(&srcview); |
| 700 | return 0; |
| 701 | |
| 702 | _error: |
| 703 | PyBuffer_Release(&srcview); |
| 704 | return -1; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 705 | } |
| 706 | |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 707 | static PyObject * |
| 708 | memory_richcompare(PyObject *v, PyObject *w, int op) |
| 709 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 710 | Py_buffer vv, ww; |
| 711 | int equal = 0; |
| 712 | PyObject *res; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 713 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 714 | vv.obj = NULL; |
| 715 | ww.obj = NULL; |
| 716 | if (op != Py_EQ && op != Py_NE) |
| 717 | goto _notimpl; |
| 718 | if (PyObject_GetBuffer(v, &vv, PyBUF_CONTIG_RO) == -1) { |
| 719 | PyErr_Clear(); |
| 720 | goto _notimpl; |
| 721 | } |
| 722 | if (PyObject_GetBuffer(w, &ww, PyBUF_CONTIG_RO) == -1) { |
| 723 | PyErr_Clear(); |
| 724 | goto _notimpl; |
| 725 | } |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 726 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 727 | if (vv.itemsize != ww.itemsize || vv.len != ww.len) |
| 728 | goto _end; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 729 | |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 730 | equal = !memcmp(vv.buf, ww.buf, vv.len); |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 731 | |
| 732 | _end: |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 733 | PyBuffer_Release(&vv); |
| 734 | PyBuffer_Release(&ww); |
| 735 | if ((equal && op == Py_EQ) || (!equal && op == Py_NE)) |
| 736 | res = Py_True; |
| 737 | else |
| 738 | res = Py_False; |
| 739 | Py_INCREF(res); |
| 740 | return res; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 741 | |
| 742 | _notimpl: |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 743 | PyBuffer_Release(&vv); |
| 744 | PyBuffer_Release(&ww); |
| 745 | Py_INCREF(Py_NotImplemented); |
| 746 | return Py_NotImplemented; |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 750 | static int |
| 751 | memory_traverse(PyMemoryViewObject *self, visitproc visit, void *arg) |
| 752 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 753 | if (self->base != NULL) |
| 754 | Py_VISIT(self->base); |
| 755 | if (self->view.obj != NULL) |
| 756 | Py_VISIT(self->view.obj); |
| 757 | return 0; |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | static int |
| 761 | memory_clear(PyMemoryViewObject *self) |
| 762 | { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 763 | Py_CLEAR(self->base); |
| 764 | PyBuffer_Release(&self->view); |
| 765 | return 0; |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 769 | /* As mapping */ |
| 770 | static PyMappingMethods memory_as_mapping = { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 771 | (lenfunc)memory_length, /* mp_length */ |
| 772 | (binaryfunc)memory_subscript, /* mp_subscript */ |
| 773 | (objobjargproc)memory_ass_sub, /* mp_ass_subscript */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 774 | }; |
| 775 | |
Raymond Hettinger | 159eac9 | 2009-06-23 20:38:54 +0000 | [diff] [blame] | 776 | static PySequenceMethods memory_as_sequence = { |
| 777 | 0, /* sq_length */ |
| 778 | 0, /* sq_concat */ |
| 779 | 0, /* sq_repeat */ |
| 780 | (ssizeargfunc)memory_item, /* sq_item */ |
| 781 | }; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 782 | |
| 783 | /* Buffer methods */ |
| 784 | |
| 785 | static PyBufferProcs memory_as_buffer = { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 786 | (getbufferproc)memory_getbuf, /* bf_getbuffer */ |
| 787 | (releasebufferproc)memory_releasebuf, /* bf_releasebuffer */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 788 | }; |
| 789 | |
| 790 | |
| 791 | PyTypeObject PyMemoryView_Type = { |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 792 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
| 793 | "memoryview", |
| 794 | sizeof(PyMemoryViewObject), |
| 795 | 0, |
| 796 | (destructor)memory_dealloc, /* tp_dealloc */ |
| 797 | 0, /* tp_print */ |
| 798 | 0, /* tp_getattr */ |
| 799 | 0, /* tp_setattr */ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 800 | 0, /* tp_reserved */ |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 801 | (reprfunc)memory_repr, /* tp_repr */ |
| 802 | 0, /* tp_as_number */ |
Raymond Hettinger | 159eac9 | 2009-06-23 20:38:54 +0000 | [diff] [blame] | 803 | &memory_as_sequence, /* tp_as_sequence */ |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 804 | &memory_as_mapping, /* tp_as_mapping */ |
| 805 | 0, /* tp_hash */ |
| 806 | 0, /* tp_call */ |
Benjamin Peterson | 8761855 | 2009-02-08 15:00:52 +0000 | [diff] [blame] | 807 | 0, /* tp_str */ |
Antoine Pitrou | 35b7e83 | 2009-01-03 19:20:36 +0000 | [diff] [blame] | 808 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 809 | 0, /* tp_setattro */ |
| 810 | &memory_as_buffer, /* tp_as_buffer */ |
| 811 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ |
| 812 | memory_doc, /* tp_doc */ |
| 813 | (traverseproc)memory_traverse, /* tp_traverse */ |
| 814 | (inquiry)memory_clear, /* tp_clear */ |
| 815 | memory_richcompare, /* tp_richcompare */ |
| 816 | 0, /* tp_weaklistoffset */ |
| 817 | 0, /* tp_iter */ |
| 818 | 0, /* tp_iternext */ |
| 819 | memory_methods, /* tp_methods */ |
| 820 | 0, /* tp_members */ |
| 821 | memory_getsetlist, /* tp_getset */ |
| 822 | 0, /* tp_base */ |
| 823 | 0, /* tp_dict */ |
| 824 | 0, /* tp_descr_get */ |
| 825 | 0, /* tp_descr_set */ |
| 826 | 0, /* tp_dictoffset */ |
| 827 | 0, /* tp_init */ |
| 828 | 0, /* tp_alloc */ |
| 829 | memory_new, /* tp_new */ |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 830 | }; |