Mercurial > cpython-lru_cache-weakref

annotate Modules/_sqlite/row.c @ 39496:352ffe77b71d legacy-trunk

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Patch #1535500: fix segfault in BZ2File.writelines and make sure it raises the correct exceptions.
author Georg Brandl <georg@python.org>
date Mon, 14 Aug 2006 21:42:55 +0000
parents d3969aeba777
children b9d4ced23506
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* row.c - an enhanced tuple for database rows
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2 *
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3 * Copyright (C) 2005-2006 Gerhard Häring <gh@ghaering.de>
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4 *
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5 * This file is part of pysqlite.
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6 *
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7 * This software is provided 'as-is', without any express or implied
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8 * warranty. In no event will the authors be held liable for any damages
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9 * arising from the use of this software.
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10 *
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11 * Permission is granted to anyone to use this software for any purpose,
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12 * including commercial applications, and to alter it and redistribute it
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13 * freely, subject to the following restrictions:
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14 *
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15 * 1. The origin of this software must not be misrepresented; you must not
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16 * claim that you wrote the original software. If you use this software
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17 * in a product, an acknowledgment in the product documentation would be
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18 * appreciated but is not required.
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19 * 2. Altered source versions must be plainly marked as such, and must not be
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20 * misrepresented as being the original software.
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21 * 3. This notice may not be removed or altered from any source distribution.
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22 */
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23
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24 #include "row.h"
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25 #include "cursor.h"
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26 #include "sqlitecompat.h"
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27
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28 void row_dealloc(Row* self)
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29 {
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30 Py_XDECREF(self->data);
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31 Py_XDECREF(self->description);
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32
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33 self->ob_type->tp_free((PyObject*)self);
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34 }
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35
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36 int row_init(Row* self, PyObject* args, PyObject* kwargs)
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37 {
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38 PyObject* data;
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39 Cursor* cursor;
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40
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41 self->data = 0;
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42 self->description = 0;
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43
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44 if (!PyArg_ParseTuple(args, "OO", &cursor, &data)) {
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45 return -1;
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46 }
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47
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48 if (!PyObject_IsInstance((PyObject*)cursor, (PyObject*)&CursorType)) {
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49 PyErr_SetString(PyExc_TypeError, "instance of cursor required for first argument");
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50 return -1;
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51 }
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52
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53 if (!PyTuple_Check(data)) {
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54 PyErr_SetString(PyExc_TypeError, "tuple required for second argument");
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55 return -1;
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56 }
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57
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58 Py_INCREF(data);
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59 self->data = data;
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60
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61 Py_INCREF(cursor->description);
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62 self->description = cursor->description;
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63
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64 return 0;
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65 }
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66
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67 PyObject* row_subscript(Row* self, PyObject* idx)
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68 {
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69 long _idx;
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70 char* key;
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71 int nitems, i;
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72 char* compare_key;
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73
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74 char* p1;
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75 char* p2;
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76
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77 PyObject* item;
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78
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79 if (PyInt_Check(idx)) {
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80 _idx = PyInt_AsLong(idx);
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81 item = PyTuple_GetItem(self->data, _idx);
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82 Py_XINCREF(item);
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83 return item;
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84 } else if (PyLong_Check(idx)) {
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85 _idx = PyLong_AsLong(idx);
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86 item = PyTuple_GetItem(self->data, _idx);
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87 Py_XINCREF(item);
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88 return item;
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89 } else if (PyString_Check(idx)) {
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90 key = PyString_AsString(idx);
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91
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92 nitems = PyTuple_Size(self->description);
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93
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94 for (i = 0; i < nitems; i++) {
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95 compare_key = PyString_AsString(PyTuple_GET_ITEM(PyTuple_GET_ITEM(self->description, i), 0));
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96 if (!compare_key) {
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97 return NULL;
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98 }
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99
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100 p1 = key;
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101 p2 = compare_key;
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102
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103 while (1) {
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104 if ((*p1 == (char)0) || (*p2 == (char)0)) {
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105 break;
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106 }
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107
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108 if ((*p1 | 0x20) != (*p2 | 0x20)) {
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109 break;
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110 }
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111
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112 p1++;
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113 p2++;
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114 }
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115
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116 if ((*p1 == (char)0) && (*p2 == (char)0)) {
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117 /* found item */
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118 item = PyTuple_GetItem(self->data, i);
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119 Py_INCREF(item);
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120 return item;
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121 }
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122
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123 }
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124
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125 PyErr_SetString(PyExc_IndexError, "No item with that key");
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126 return NULL;
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127 } else if (PySlice_Check(idx)) {
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128 PyErr_SetString(PyExc_ValueError, "slices not implemented, yet");
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129 return NULL;
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130 } else {
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131 PyErr_SetString(PyExc_IndexError, "Index must be int or string");
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132 return NULL;
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133 }
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134 }
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135
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136 Py_ssize_t row_length(Row* self, PyObject* args, PyObject* kwargs)
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137 {
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138 return PyTuple_GET_SIZE(self->data);
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139 }
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140
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141 static int row_print(Row* self, FILE *fp, int flags)
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142 {
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143 return (&PyTuple_Type)->tp_print(self->data, fp, flags);
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144 }
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145
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146
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147 PyMappingMethods row_as_mapping = {
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148 /* mp_length */ (lenfunc)row_length,
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149 /* mp_subscript */ (binaryfunc)row_subscript,
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150 /* mp_ass_subscript */ (objobjargproc)0,
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151 };
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152
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153
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154 PyTypeObject RowType = {
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155 PyObject_HEAD_INIT(NULL)
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156 0, /* ob_size */
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157 MODULE_NAME ".Row", /* tp_name */
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158 sizeof(Row), /* tp_basicsize */
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159 0, /* tp_itemsize */
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160 (destructor)row_dealloc, /* tp_dealloc */
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161 (printfunc)row_print, /* tp_print */
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162 0, /* tp_getattr */
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163 0, /* tp_setattr */
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164 0, /* tp_compare */
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165 0, /* tp_repr */
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166 0, /* tp_as_number */
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167 0, /* tp_as_sequence */
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168 0, /* tp_as_mapping */
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169 0, /* tp_hash */
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170 0, /* tp_call */
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171 0, /* tp_str */
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172 0, /* tp_getattro */
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173 0, /* tp_setattro */
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174 0, /* tp_as_buffer */
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175 Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
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176 0, /* tp_doc */
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177 0, /* tp_traverse */
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178 0, /* tp_clear */
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179 0, /* tp_richcompare */
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180 0, /* tp_weaklistoffset */
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181 0, /* tp_iter */
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182 0, /* tp_iternext */
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183 0, /* tp_methods */
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184 0, /* tp_members */
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185 0, /* tp_getset */
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186 0, /* tp_base */
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187 0, /* tp_dict */
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188 0, /* tp_descr_get */
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189 0, /* tp_descr_set */
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190 0, /* tp_dictoffset */
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191 (initproc)row_init, /* tp_init */
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192 0, /* tp_alloc */
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193 0, /* tp_new */
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194 0 /* tp_free */
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195 };
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196
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197 extern int row_setup_types(void)
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198 {
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199 RowType.tp_new = PyType_GenericNew;
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200 RowType.tp_as_mapping = &row_as_mapping;
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201 return PyType_Ready(&RowType);
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202 }