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annotate Objects/memoryobject.c @ 46567:ffeecbebf3ca

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Block 2.6-only doc change.
author Georg Brandl <georg@python.org>
date Sat, 26 Apr 2008 18:28:08 +0000
parents f324631462a2
children 96b34263e448
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Memoryview object implementation */
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4 #include "Python.h"
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6 static int
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7 memory_getbuf(PyMemoryViewObject *self, Py_buffer *view, int flags)
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8 {
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9 if (view != NULL)
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10 *view = self->view;
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11 if (self->base == NULL)
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12 return 0;
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13 return self->base->ob_type->tp_as_buffer->bf_getbuffer(self->base, NULL,
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14 PyBUF_FULL);
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15 }
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17 static void
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18 memory_releasebuf(PyMemoryViewObject *self, Py_buffer *view)
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19 {
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20 if (self->base != NULL)
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21 PyObject_ReleaseBuffer(self->base, NULL);
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22 }
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24 PyDoc_STRVAR(memory_doc,
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25 "memoryview(object)\n\
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26 \n\
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27 Create a new memoryview object which references the given object.");
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29 PyObject *
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30 PyMemoryView_FromMemory(Py_buffer *info)
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31 {
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32 PyMemoryViewObject *mview;
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33
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34 mview = (PyMemoryViewObject *)PyObject_New(PyMemoryViewObject,
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35 &PyMemoryView_Type);
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36 if (mview == NULL) return NULL;
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37 mview->base = NULL;
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38 mview->view = *info;
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39 return (PyObject *)mview;
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40 }
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42 PyObject *
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43 PyMemoryView_FromObject(PyObject *base)
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44 {
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45 PyMemoryViewObject *mview;
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47 if (!PyObject_CheckBuffer(base)) {
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48 PyErr_SetString(PyExc_TypeError,
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49 "cannot make memory view because object does "
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50 "not have the buffer interface");
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51 return NULL;
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52 }
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53
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54 mview = (PyMemoryViewObject *)PyObject_New(PyMemoryViewObject,
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55 &PyMemoryView_Type);
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56 if (mview == NULL) return NULL;
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57
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58 mview->base = NULL;
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59 if (PyObject_GetBuffer(base, &(mview->view), PyBUF_FULL) < 0) {
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60 Py_DECREF(mview);
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61 return NULL;
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62 }
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63
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64 mview->base = base;
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65 Py_INCREF(base);
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66 return (PyObject *)mview;
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67 }
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68
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69 static PyObject *
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70 memory_new(PyTypeObject *subtype, PyObject *args, PyObject *kwds)
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71 {
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72 PyObject *obj;
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73 static char *kwlist[] = {"object", 0};
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74
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75 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:memoryview", kwlist,
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76 &obj)) {
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77 return NULL;
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78 }
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79
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80 return PyMemoryView_FromObject(obj);
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81 }
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82
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83
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84 static void
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85 _strided_copy_nd(char *dest, char *src, int nd, Py_ssize_t *shape,
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86 Py_ssize_t *strides, Py_ssize_t itemsize, char fort)
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87 {
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88 int k;
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89 Py_ssize_t outstride;
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90
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91 if (nd==0) {
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92 memcpy(dest, src, itemsize);
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93 }
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94 else if (nd == 1) {
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95 for (k = 0; k<shape[0]; k++) {
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96 memcpy(dest, src, itemsize);
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97 dest += itemsize;
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98 src += strides[0];
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99 }
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100 }
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101 else {
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102 if (fort == 'F') {
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103 /* Copy first dimension first,
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104 second dimension second, etc...
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105 Set up the recursive loop backwards so that final
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106 dimension is actually copied last.
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107 */
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108 outstride = itemsize;
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109 for (k=1; k<nd-1;k++) {
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110 outstride *= shape[k];
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111 }
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112 for (k=0; k<shape[nd-1]; k++) {
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113 _strided_copy_nd(dest, src, nd-1, shape,
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114 strides, itemsize, fort);
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115 dest += outstride;
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116 src += strides[nd-1];
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117 }
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118 }
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119
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120 else {
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121 /* Copy last dimension first,
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122 second-to-last dimension second, etc.
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123 Set up the recursion so that the
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124 first dimension is copied last
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125 */
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126 outstride = itemsize;
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127 for (k=1; k < nd; k++) {
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128 outstride *= shape[k];
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129 }
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130 for (k=0; k<shape[0]; k++) {
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131 _strided_copy_nd(dest, src, nd-1, shape+1,
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132 strides+1, itemsize,
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133 fort);
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134 dest += outstride;
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135 src += strides[0];
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136 }
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137 }
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138 }
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139 return;
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140 }
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141
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142 void _add_one_to_index_F(int nd, Py_ssize_t *index, Py_ssize_t *shape);
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143 void _add_one_to_index_C(int nd, Py_ssize_t *index, Py_ssize_t *shape);
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144
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145 static int
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146 _indirect_copy_nd(char *dest, Py_buffer *view, char fort)
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147 {
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148 Py_ssize_t *indices;
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149 int k;
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150 Py_ssize_t elements;
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151 char *ptr;
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152 void (*func)(int, Py_ssize_t *, Py_ssize_t *);
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153
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154
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155 /* XXX(nnorwitz): need to check for overflow! */
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156 indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*view->ndim);
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157 if (indices == NULL) {
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158 PyErr_NoMemory();
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159 return -1;
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160 }
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161 for (k=0; k<view->ndim;k++) {
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162 indices[k] = 0;
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163 }
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164
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165 elements = 1;
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166 for (k=0; k<view->ndim; k++) {
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167 elements *= view->shape[k];
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168 }
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169 if (fort == 'F') {
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170 func = _add_one_to_index_F;
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171 }
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172 else {
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173 func = _add_one_to_index_C;
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174 }
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175 while (elements--) {
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176 func(view->ndim, indices, view->shape);
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177 ptr = PyBuffer_GetPointer(view, indices);
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178 memcpy(dest, ptr, view->itemsize);
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179 dest += view->itemsize;
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180 }
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181
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182 PyMem_Free(indices);
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183 return 0;
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184 }
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185
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186 /*
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187 Get a the data from an object as a contiguous chunk of memory (in
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188 either 'C' or 'F'ortran order) even if it means copying it into a
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189 separate memory area.
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190
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191 Returns a new reference to a Memory view object. If no copy is needed,
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192 the memory view object points to the original memory and holds a
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193 lock on the original. If a copy is needed, then the memory view object
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194 points to a brand-new Bytes object (and holds a memory lock on it).
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195
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196 buffertype
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197
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198 PyBUF_READ buffer only needs to be read-only
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199 PyBUF_WRITE buffer needs to be writable (give error if not contiguous)
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200 PyBUF_SHADOW buffer needs to be writable so shadow it with
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201 a contiguous buffer if it is not. The view will point to
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202 the shadow buffer which can be written to and then
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203 will be copied back into the other buffer when the memory
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204 view is de-allocated. While the shadow buffer is
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205 being used, it will have an exclusive write lock on
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206 the original buffer.
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207 */
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208
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209 PyObject *
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210 PyMemoryView_GetContiguous(PyObject *obj, int buffertype, char fort)
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211 {
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212 PyMemoryViewObject *mem;
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213 PyObject *bytes;
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214 Py_buffer *view;
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215 int flags;
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216 char *dest;
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217
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218 if (!PyObject_CheckBuffer(obj)) {
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219 PyErr_SetString(PyExc_TypeError,
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220 "object does not have the buffer interface");
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221 return NULL;
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222 }
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223
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224 mem = PyObject_New(PyMemoryViewObject, &PyMemoryView_Type);
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225 if (mem == NULL) return NULL;
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226
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227 view = &PyMemoryView(mem);
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228 flags = PyBUF_FULL_RO;
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229 switch(buffertype) {
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230 case PyBUF_WRITE:
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231 flags = PyBUF_FULL;
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232 break;
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233 case PyBUF_SHADOW:
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234 flags = PyBUF_FULL_XLCK;
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235 break;
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236 }
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237
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238 if (PyObject_GetBuffer(obj, view, flags) != 0) {
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239 PyObject_DEL(mem);
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240 return NULL;
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241 }
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242
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243 if (PyBuffer_IsContiguous(view, fort)) {
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244 /* no copy needed */
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245 Py_INCREF(obj);
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246 mem->base = obj;
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247 return (PyObject *)mem;
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248 }
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249 /* otherwise a copy is needed */
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250 if (buffertype == PyBUF_WRITE) {
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251 PyObject_DEL(mem);
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252 PyErr_SetString(PyExc_BufferError,
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253 "writable contiguous buffer requested "
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254 "for a non-contiguousobject.");
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255 return NULL;
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256 }
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257 bytes = PyBytes_FromStringAndSize(NULL, view->len);
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258 if (bytes == NULL) {
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259 PyObject_ReleaseBuffer(obj, view);
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260 return NULL;
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261 }
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262 dest = PyBytes_AS_STRING(bytes);
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263 /* different copying strategy depending on whether
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264 or not any pointer de-referencing is needed
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265 */
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266 /* strided or in-direct copy */
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267 if (view->suboffsets==NULL) {
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268 _strided_copy_nd(dest, view->buf, view->ndim, view->shape,
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269 view->strides, view->itemsize, fort);
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270 }
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271 else {
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272 if (_indirect_copy_nd(dest, view, fort) < 0) {
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273 Py_DECREF(bytes);
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274 PyObject_ReleaseBuffer(obj, view);
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275 return NULL;
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276 }
42665
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277 }
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278 if (buffertype == PyBUF_SHADOW) {
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279 /* return a shadowed memory-view object */
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280 view->buf = dest;
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281 mem->base = PyTuple_Pack(2, obj, bytes);
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282 Py_DECREF(bytes);
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283 if (mem->base == NULL) {
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284 PyObject_ReleaseBuffer(obj, view);
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285 return NULL;
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286 }
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287 }
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288 else {
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289 PyObject_ReleaseBuffer(obj, view);
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290 /* steal the reference */
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291 mem->base = bytes;
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292 }
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293 return (PyObject *)mem;
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294 }
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295
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296
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297 static PyObject *
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298 memory_format_get(PyMemoryViewObject *self)
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299 {
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300 return PyUnicode_FromString(self->view.format);
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301 }
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302
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303 static PyObject *
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304 memory_itemsize_get(PyMemoryViewObject *self)
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305 {
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306 return PyLong_FromSsize_t(self->view.itemsize);
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307 }
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diff changeset
308
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diff changeset
309 static PyObject *
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310 _IntTupleFromSsizet(int len, Py_ssize_t *vals)
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311 {
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diff changeset
312 int i;
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313 PyObject *o;
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314 PyObject *intTuple;
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315
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diff changeset
316 if (vals == NULL) {
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317 Py_INCREF(Py_None);
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318 return Py_None;
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319 }
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320 intTuple = PyTuple_New(len);
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diff changeset
321 if (!intTuple) return NULL;
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diff changeset
322 for(i=0; i<len; i++) {
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f324631462a2 Cleanup: Replaced most PyInt_ aliases with PyLong_ and disabled the aliases in intobject.h
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diff changeset
323 o = PyLong_FromSsize_t(vals[i]);
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324 if (!o) {
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325 Py_DECREF(intTuple);
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326 return NULL;
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327 }
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328 PyTuple_SET_ITEM(intTuple, i, o);
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329 }
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330 return intTuple;
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331 }
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332
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333 static PyObject *
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334 memory_shape_get(PyMemoryViewObject *self)
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335 {
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336 return _IntTupleFromSsizet(self->view.ndim, self->view.shape);
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337 }
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338
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339 static PyObject *
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340 memory_strides_get(PyMemoryViewObject *self)
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341 {
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342 return _IntTupleFromSsizet(self->view.ndim, self->view.strides);
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343 }
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344
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345 static PyObject *
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346 memory_suboffsets_get(PyMemoryViewObject *self)
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347 {
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348 return _IntTupleFromSsizet(self->view.ndim, self->view.suboffsets);
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349 }
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350
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351 static PyObject *
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352 memory_size_get(PyMemoryViewObject *self)
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353 {
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354 return PyLong_FromSsize_t(self->view.len);
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355 }
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356
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357 static PyObject *
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358 memory_readonly_get(PyMemoryViewObject *self)
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359 {
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360 return PyBool_FromLong(self->view.readonly);
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361 }
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362
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363 static PyObject *
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364 memory_ndim_get(PyMemoryViewObject *self)
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365 {
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366 return PyLong_FromLong(self->view.ndim);
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367 }
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368
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369 static PyGetSetDef memory_getsetlist[] ={
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370 {"format", (getter)memory_format_get, NULL, NULL},
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371 {"itemsize", (getter)memory_itemsize_get, NULL, NULL},
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372 {"shape", (getter)memory_shape_get, NULL, NULL},
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373 {"strides", (getter)memory_strides_get, NULL, NULL},
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374 {"suboffsets", (getter)memory_suboffsets_get, NULL, NULL},
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375 {"size", (getter)memory_size_get, NULL, NULL},
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376 {"readonly", (getter)memory_readonly_get, NULL, NULL},
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377 {"ndim", (getter)memory_ndim_get, NULL, NULL},
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378 {NULL, NULL, NULL, NULL},
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379 };
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380
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381
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382 static PyObject *
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383 memory_tobytes(PyMemoryViewObject *mem, PyObject *noargs)
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384 {
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385 return PyBytes_FromObject((PyObject *)mem);
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386 }
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387
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388 static PyObject *
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389 memory_tolist(PyMemoryViewObject *mem, PyObject *noargs)
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390 {
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391 /* This should construct a (nested) list of unpacked objects
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392 possibly using the struct module.
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393 */
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394 Py_INCREF(Py_NotImplemented);
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395 return Py_NotImplemented;
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396 }
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397
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398
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399
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400 static PyMethodDef memory_methods[] = {
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401 {"tobytes", (PyCFunction)memory_tobytes, METH_NOARGS, NULL},
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402 {"tolist", (PyCFunction)memory_tolist, METH_NOARGS, NULL},
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403 {NULL, NULL} /* sentinel */
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404 };
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405
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406
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407 static void
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408 memory_dealloc(PyMemoryViewObject *self)
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409 {
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410 if (self->base != NULL) {
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411 if (PyTuple_Check(self->base)) {
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412 /* Special case when first element is generic object
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413 with buffer interface and the second element is a
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414 contiguous "shadow" that must be copied back into
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415 the data areay of the first tuple element before
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416 releasing the buffer on the first element.
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417 */
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418
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419 PyObject_CopyData(PyTuple_GET_ITEM(self->base,0),
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420 PyTuple_GET_ITEM(self->base,1));
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421
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422 /* The view member should have readonly == -1 in
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423 this instance indicating that the memory can
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424 be "locked" and was locked and will be unlocked
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425 again after this call.
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426 */
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427 PyObject_ReleaseBuffer(PyTuple_GET_ITEM(self->base,0),
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428 &(self->view));
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429 }
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430 else {
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431 PyObject_ReleaseBuffer(self->base, &(self->view));
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432 }
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433 Py_CLEAR(self->base);
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434 }
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435 PyObject_DEL(self);
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diff changeset
436 }
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diff changeset
437
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438 static PyObject *
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diff changeset
439 memory_repr(PyMemoryViewObject *self)
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440 {
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441 return PyUnicode_FromFormat("<memory at %p>", self);
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442 }
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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443
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444
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445 static PyObject *
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446 memory_str(PyMemoryViewObject *self)
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diff changeset
447 {
43423
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448 Py_buffer view;
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449 PyObject *res;
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450
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451 if (PyObject_GetBuffer((PyObject *)self, &view, PyBUF_FULL) < 0)
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452 return NULL;
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453
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454 res = PyBytes_FromStringAndSize(NULL, view.len);
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455 PyBuffer_ToContiguous(PyBytes_AS_STRING(res), &view, view.len, 'C');
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456 PyObject_ReleaseBuffer((PyObject *)self, &view);
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457 return res;
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458 }
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459
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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diff changeset
460 /* Sequence methods */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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diff changeset
461
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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462 static Py_ssize_t
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diff changeset
463 memory_length(PyMemoryViewObject *self)
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464 {
43423
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465 Py_buffer view;
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466
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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diff changeset
467 if (PyObject_GetBuffer((PyObject *)self, &view, PyBUF_FULL) < 0)
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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468 return -1;
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469 PyObject_ReleaseBuffer((PyObject *)self, &view);
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470 return view.len;
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471 }
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
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diff changeset
472
43439
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473 /*
43423
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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474 mem[obj] returns a bytes object holding the data for one element if
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
475 obj fully indexes the memory view or another memory-view object
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
476 if it does not.
43439
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477
43423
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
478 0-d memory-view objects can be referenced using ... or () but
43439
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diff changeset
479 not with anything else.
43423
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
480 */
42665
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diff changeset
481 static PyObject *
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diff changeset
482 memory_subscript(PyMemoryViewObject *self, PyObject *key)
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parents:
diff changeset
483 {
43423
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diff changeset
484 Py_buffer *view;
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
485 view = &(self->view);
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
486
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
487 if (view->ndim == 0) {
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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488 if (key == Py_Ellipsis ||
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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489 (PyTuple_Check(key) && PyTuple_GET_SIZE(key)==0)) {
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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490 Py_INCREF(self);
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491 return (PyObject *)self;
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492 }
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diff changeset
493 else {
43439
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494 PyErr_SetString(PyExc_IndexError,
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495 "invalid indexing of 0-dim memory");
43423
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496 return NULL;
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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497 }
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498 }
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
499 if (PyIndex_Check(key)) {
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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500 Py_ssize_t result;
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501 result = PyNumber_AsSsize_t(key, NULL);
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diff changeset
502 if (result == -1 && PyErr_Occurred())
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
503 return NULL;
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
504 if (view->ndim == 1) {
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
505 /* Return a bytes object */
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
506 char *ptr;
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
507 ptr = (char *)view->buf;
43550
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diff changeset
508 if (result < 0) {
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
509 result += view->shape[0];
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diff changeset
510 }
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
511 if ((result < 0) || (result > view->shape[0])) {
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Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
512 PyErr_SetString(PyExc_IndexError,
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
513 "index out of bounds");
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
514 return NULL;
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
515 }
43439
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diff changeset
516 if (view->strides == NULL)
43423
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diff changeset
517 ptr += view->itemsize * result;
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
518 else
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
519 ptr += view->strides[0] * result;
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diff changeset
520 if (view->suboffsets != NULL &&
79b0db0356d3 Whitespace and line lengrth cleanup.
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diff changeset
521 view->suboffsets[0] >= 0)
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parents: 43423
diff changeset
522 {
43423
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diff changeset
523 ptr = *((char **)ptr) + view->suboffsets[0];
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
524 }
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
525 return PyBytes_FromStringAndSize(ptr, view->itemsize);
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
526 }
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
527 else {
43439
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diff changeset
528 /* Return a new memory-view object */
43423
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diff changeset
529 Py_buffer newview;
43485
074130a073b6 At least one of the buildbots was complaining about newview being used
Neal Norwitz <nnorwitz@gmail.com>
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diff changeset
530 memset(&newview, 0, sizeof(newview));
43550
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diff changeset
531 /* XXX: This needs to be fixed so it
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
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diff changeset
532 actually returns a sub-view
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
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diff changeset
533 */
43485
074130a073b6 At least one of the buildbots was complaining about newview being used
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diff changeset
534 return PyMemoryView_FromMemory(&newview);
43423
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
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diff changeset
535 }
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
parents: 43384
diff changeset
536 }
43439
79b0db0356d3 Whitespace and line lengrth cleanup.
Guido van Rossum <guido@python.org>
parents: 43423
diff changeset
537
43550
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
parents: 43488
diff changeset
538 /* Need to support getting a sliced view */
42665
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
539 Py_INCREF(Py_NotImplemented);
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
540 return Py_NotImplemented;
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
541 }
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
542
43550
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
parents: 43488
diff changeset
543
4ea945cbbb6d Fix problems with memoryview object. There is still more to do to finish PEP 3118. The memory-view object needs to be fleshed out and the struct module needs to be modified.
Travis E. Oliphant <oliphant@enthought.com>
parents: 43488
diff changeset
544 /* Need to support assigning memory if we can */
42665
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
545 static int
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
546 memory_ass_sub(PyMemoryViewObject *self, PyObject *key, PyObject *value)
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
547 {
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
548 return 0;
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
549 }
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
550
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
551 /* As mapping */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
552 static PyMappingMethods memory_as_mapping = {
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
553 (lenfunc)memory_length, /*mp_length*/
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
554 (binaryfunc)memory_subscript, /*mp_subscript*/
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
555 (objobjargproc)memory_ass_sub, /*mp_ass_subscript*/
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
556 };
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
557
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
558
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
559 /* Buffer methods */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
560
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
561 static PyBufferProcs memory_as_buffer = {
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
562 (getbufferproc)memory_getbuf, /* bf_getbuffer */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
563 (releasebufferproc)memory_releasebuf, /* bf_releasebuffer */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
564 };
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
565
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
566
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
567 PyTypeObject PyMemoryView_Type = {
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
568 PyVarObject_HEAD_INIT(&PyType_Type, 0)
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
569 "memoryview",
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
570 sizeof(PyMemoryViewObject),
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
571 0,
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
572 (destructor)memory_dealloc, /* tp_dealloc */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
573 0, /* tp_print */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
574 0, /* tp_getattr */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
575 0, /* tp_setattr */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
576 0, /* tp_compare */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
577 (reprfunc)memory_repr, /* tp_repr */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
578 0, /* tp_as_number */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
579 0, /* tp_as_sequence */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
580 &memory_as_mapping, /* tp_as_mapping */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
581 0, /* tp_hash */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
582 0, /* tp_call */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
583 (reprfunc)memory_str, /* tp_str */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
584 PyObject_GenericGetAttr, /* tp_getattro */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
585 0, /* tp_setattro */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
586 &memory_as_buffer, /* tp_as_buffer */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
587 Py_TPFLAGS_DEFAULT, /* tp_flags */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
588 memory_doc, /* tp_doc */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
589 0, /* tp_traverse */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
590 0, /* tp_clear */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
591 0, /* tp_richcompare */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
592 0, /* tp_weaklistoffset */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
593 0, /* tp_iter */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
594 0, /* tp_iternext */
43439
79b0db0356d3 Whitespace and line lengrth cleanup.
Guido van Rossum <guido@python.org>
parents: 43423
diff changeset
595 memory_methods, /* tp_methods */
42665
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
596 0, /* tp_members */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
597 memory_getsetlist, /* tp_getset */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
598 0, /* tp_base */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
599 0, /* tp_dict */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
600 0, /* tp_descr_get */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
601 0, /* tp_descr_set */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
602 0, /* tp_dictoffset */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
603 0, /* tp_init */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
604 0, /* tp_alloc */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
605 memory_new, /* tp_new */
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents:
diff changeset
606 };