Mercurial > cpython-lru_cache-weakref

annotate Modules/_sqlite/module.c @ 46178:e06e08e8fdce

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Bring sqlite3 module up-to-date with what's now in 2.6. Almost. I intentionally left out the stuff about creating a connection object from a APSW connection.
author Gerhard Häring <gh@ghaering.de>
date Sat, 29 Mar 2008 00:45:29 +0000
parents f324631462a2
children 96b34263e448
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rev   line source
46178
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1 /* module.c - the module itself
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2 *
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3 * Copyright (C) 2004-2007 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 "connection.h"
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25 #include "statement.h"
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26 #include "cursor.h"
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27 #include "cache.h"
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28 #include "prepare_protocol.h"
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29 #include "microprotocols.h"
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30 #include "row.h"
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31
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32 #if SQLITE_VERSION_NUMBER >= 3003003
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33 #define HAVE_SHARED_CACHE
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34 #endif
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35
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36 /* static objects at module-level */
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37
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38 PyObject* pysqlite_Error, *pysqlite_Warning, *pysqlite_InterfaceError, *pysqlite_DatabaseError,
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39 *pysqlite_InternalError, *pysqlite_OperationalError, *pysqlite_ProgrammingError,
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40 *pysqlite_IntegrityError, *pysqlite_DataError, *pysqlite_NotSupportedError, *pysqlite_OptimizedUnicode;
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41
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42 PyObject* converters;
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43 int _enable_callback_tracebacks;
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44 int pysqlite_BaseTypeAdapted;
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45
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46 static PyObject* module_connect(PyObject* self, PyObject* args, PyObject*
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47 kwargs)
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48 {
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49 /* Python seems to have no way of extracting a single keyword-arg at
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50 * C-level, so this code is redundant with the one in connection_init in
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51 * connection.c and must always be copied from there ... */
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52
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53 static char *kwlist[] = {"database", "timeout", "detect_types", "isolation_level", "check_same_thread", "factory", "cached_statements", NULL, NULL};
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54 char* database;
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55 int detect_types = 0;
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56 PyObject* isolation_level;
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57 PyObject* factory = NULL;
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58 int check_same_thread = 1;
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59 int cached_statements;
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60 double timeout = 5.0;
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61
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62 PyObject* result;
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63
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64 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|diOiOi", kwlist,
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65 &database, &timeout, &detect_types, &isolation_level, &check_same_thread, &factory, &cached_statements))
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66 {
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67 return NULL;
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68 }
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69
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70 if (factory == NULL) {
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71 factory = (PyObject*)&pysqlite_ConnectionType;
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72 }
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73
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74 result = PyObject_Call(factory, args, kwargs);
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75
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76 return result;
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77 }
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78
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79 static PyObject* module_complete(PyObject* self, PyObject* args, PyObject*
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80 kwargs)
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81 {
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82 static char *kwlist[] = {"statement", NULL, NULL};
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83 char* statement;
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84
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85 PyObject* result;
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86
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87 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &statement))
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88 {
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89 return NULL;
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90 }
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91
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92 if (sqlite3_complete(statement)) {
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93 result = Py_True;
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94 } else {
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95 result = Py_False;
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96 }
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97
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98 Py_INCREF(result);
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99
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100 return result;
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101 }
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102
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103 #ifdef HAVE_SHARED_CACHE
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104 static PyObject* module_enable_shared_cache(PyObject* self, PyObject* args, PyObject*
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105 kwargs)
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106 {
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107 static char *kwlist[] = {"do_enable", NULL, NULL};
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108 int do_enable;
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109 int rc;
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110
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111 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i", kwlist, &do_enable))
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112 {
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113 return NULL;
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114 }
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115
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116 rc = sqlite3_enable_shared_cache(do_enable);
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117
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118 if (rc != SQLITE_OK) {
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119 PyErr_SetString(pysqlite_OperationalError, "Changing the shared_cache flag failed");
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120 return NULL;
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121 } else {
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122 Py_INCREF(Py_None);
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123 return Py_None;
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124 }
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125 }
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126 #endif /* HAVE_SHARED_CACHE */
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127
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128 static PyObject* module_register_adapter(PyObject* self, PyObject* args, PyObject* kwargs)
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129 {
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130 PyTypeObject* type;
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131 PyObject* caster;
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132
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133 if (!PyArg_ParseTuple(args, "OO", &type, &caster)) {
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134 return NULL;
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135 }
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136
46178
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137 /* a basic type is adapted; there's a performance optimization if that's not the case
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138 * (99 % of all usages) */
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139 if (type == &PyLong_Type || type == &PyFloat_Type
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140 || type == &PyUnicode_Type || type == &PyBytes_Type) {
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141 pysqlite_BaseTypeAdapted = 1;
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142 }
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143
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144 microprotocols_add(type, (PyObject*)&pysqlite_PrepareProtocolType, caster);
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145
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146 Py_INCREF(Py_None);
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147 return Py_None;
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148 }
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149
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150 static PyObject* module_register_converter(PyObject* self, PyObject* args, PyObject* kwargs)
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151 {
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152 PyObject* orig_name;
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153 PyObject* name = NULL;
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154 PyObject* callable;
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155 PyObject* retval = NULL;
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156
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157 if (!PyArg_ParseTuple(args, "UO", &orig_name, &callable)) {
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158 return NULL;
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159 }
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160
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161 /* convert the name to upper case */
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162 name = PyObject_CallMethod(orig_name, "upper", "");
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163 if (!name) {
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164 goto error;
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165 }
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166
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167 if (PyDict_SetItem(converters, name, callable) != 0) {
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168 goto error;
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169 }
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170
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171 Py_INCREF(Py_None);
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172 retval = Py_None;
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173 error:
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174 Py_XDECREF(name);
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175 return retval;
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176 }
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177
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178 static PyObject* enable_callback_tracebacks(PyObject* self, PyObject* args, PyObject* kwargs)
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179 {
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180 if (!PyArg_ParseTuple(args, "i", &_enable_callback_tracebacks)) {
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181 return NULL;
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182 }
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183
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184 Py_INCREF(Py_None);
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185 return Py_None;
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186 }
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187
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188 static void converters_init(PyObject* dict)
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189 {
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190 converters = PyDict_New();
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191 if (!converters) {
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192 return;
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193 }
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194
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195 PyDict_SetItemString(dict, "converters", converters);
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196 }
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197
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198 static PyMethodDef module_methods[] = {
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199 {"connect", (PyCFunction)module_connect, METH_VARARGS|METH_KEYWORDS, PyDoc_STR("Creates a connection.")},
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200 {"complete_statement", (PyCFunction)module_complete, METH_VARARGS|METH_KEYWORDS, PyDoc_STR("Checks if a string contains a complete SQL statement. Non-standard.")},
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201 #ifdef HAVE_SHARED_CACHE
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202 {"enable_shared_cache", (PyCFunction)module_enable_shared_cache, METH_VARARGS|METH_KEYWORDS, PyDoc_STR("Enable or disable shared cache mode for the calling thread. Experimental/Non-standard.")},
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203 #endif
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204 {"register_adapter", (PyCFunction)module_register_adapter, METH_VARARGS, PyDoc_STR("Registers an adapter with pysqlite's adapter registry. Non-standard.")},
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205 {"register_converter", (PyCFunction)module_register_converter, METH_VARARGS, PyDoc_STR("Registers a converter with pysqlite. Non-standard.")},
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206 {"adapt", (PyCFunction)psyco_microprotocols_adapt, METH_VARARGS, psyco_microprotocols_adapt_doc},
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207 {"enable_callback_tracebacks", (PyCFunction)enable_callback_tracebacks, METH_VARARGS, PyDoc_STR("Enable or disable callback functions throwing errors to stderr.")},
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208 {NULL, NULL}
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209 };
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210
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211 struct _IntConstantPair {
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212 char* constant_name;
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213 int constant_value;
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214 };
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215
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216 typedef struct _IntConstantPair IntConstantPair;
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217
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218 static IntConstantPair _int_constants[] = {
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219 {"PARSE_DECLTYPES", PARSE_DECLTYPES},
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220 {"PARSE_COLNAMES", PARSE_COLNAMES},
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221
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222 {"SQLITE_OK", SQLITE_OK},
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223 {"SQLITE_DENY", SQLITE_DENY},
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224 {"SQLITE_IGNORE", SQLITE_IGNORE},
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225 {"SQLITE_CREATE_INDEX", SQLITE_CREATE_INDEX},
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226 {"SQLITE_CREATE_TABLE", SQLITE_CREATE_TABLE},
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227 {"SQLITE_CREATE_TEMP_INDEX", SQLITE_CREATE_TEMP_INDEX},
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228 {"SQLITE_CREATE_TEMP_TABLE", SQLITE_CREATE_TEMP_TABLE},
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229 {"SQLITE_CREATE_TEMP_TRIGGER", SQLITE_CREATE_TEMP_TRIGGER},
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230 {"SQLITE_CREATE_TEMP_VIEW", SQLITE_CREATE_TEMP_VIEW},
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231 {"SQLITE_CREATE_TRIGGER", SQLITE_CREATE_TRIGGER},
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232 {"SQLITE_CREATE_VIEW", SQLITE_CREATE_VIEW},
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233 {"SQLITE_DELETE", SQLITE_DELETE},
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234 {"SQLITE_DROP_INDEX", SQLITE_DROP_INDEX},
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235 {"SQLITE_DROP_TABLE", SQLITE_DROP_TABLE},
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236 {"SQLITE_DROP_TEMP_INDEX", SQLITE_DROP_TEMP_INDEX},
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237 {"SQLITE_DROP_TEMP_TABLE", SQLITE_DROP_TEMP_TABLE},
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238 {"SQLITE_DROP_TEMP_TRIGGER", SQLITE_DROP_TEMP_TRIGGER},
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239 {"SQLITE_DROP_TEMP_VIEW", SQLITE_DROP_TEMP_VIEW},
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240 {"SQLITE_DROP_TRIGGER", SQLITE_DROP_TRIGGER},
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241 {"SQLITE_DROP_VIEW", SQLITE_DROP_VIEW},
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242 {"SQLITE_INSERT", SQLITE_INSERT},
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243 {"SQLITE_PRAGMA", SQLITE_PRAGMA},
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244 {"SQLITE_READ", SQLITE_READ},
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245 {"SQLITE_SELECT", SQLITE_SELECT},
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246 {"SQLITE_TRANSACTION", SQLITE_TRANSACTION},
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247 {"SQLITE_UPDATE", SQLITE_UPDATE},
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248 {"SQLITE_ATTACH", SQLITE_ATTACH},
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249 {"SQLITE_DETACH", SQLITE_DETACH},
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250 #if SQLITE_VERSION_NUMBER >= 3002001
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251 {"SQLITE_ALTER_TABLE", SQLITE_ALTER_TABLE},
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252 {"SQLITE_REINDEX", SQLITE_REINDEX},
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253 #endif
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254 #if SQLITE_VERSION_NUMBER >= 3003000
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255 {"SQLITE_ANALYZE", SQLITE_ANALYZE},
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256 #endif
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257 {(char*)NULL, 0}
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258 };
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259
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260 PyMODINIT_FUNC init_sqlite3(void)
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261 {
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262 PyObject *module, *dict;
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263 PyObject *tmp_obj;
39442
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264 int i;
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265
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266 module = Py_InitModule("_sqlite3", module_methods);
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267
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268 if (!module ||
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269 (pysqlite_row_setup_types() < 0) ||
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270 (pysqlite_cursor_setup_types() < 0) ||
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271 (pysqlite_connection_setup_types() < 0) ||
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272 (pysqlite_cache_setup_types() < 0) ||
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273 (pysqlite_statement_setup_types() < 0) ||
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274 (pysqlite_prepare_protocol_setup_types() < 0)
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275 ) {
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276 return;
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277 }
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278
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279 Py_INCREF(&pysqlite_ConnectionType);
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280 PyModule_AddObject(module, "Connection", (PyObject*) &pysqlite_ConnectionType);
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281 Py_INCREF(&pysqlite_CursorType);
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282 PyModule_AddObject(module, "Cursor", (PyObject*) &pysqlite_CursorType);
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283 Py_INCREF(&pysqlite_CacheType);
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284 PyModule_AddObject(module, "Statement", (PyObject*)&pysqlite_StatementType);
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285 Py_INCREF(&pysqlite_StatementType);
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286 PyModule_AddObject(module, "Cache", (PyObject*) &pysqlite_CacheType);
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287 Py_INCREF(&pysqlite_PrepareProtocolType);
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288 PyModule_AddObject(module, "PrepareProtocol", (PyObject*) &pysqlite_PrepareProtocolType);
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289 Py_INCREF(&pysqlite_RowType);
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290 PyModule_AddObject(module, "Row", (PyObject*) &pysqlite_RowType);
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291
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292 if (!(dict = PyModule_GetDict(module))) {
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293 goto error;
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294 }
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295
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296 /*** Create DB-API Exception hierarchy */
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297
42084
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298 if (!(pysqlite_Error = PyErr_NewException(MODULE_NAME ".Error", PyExc_Exception, NULL))) {
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299 goto error;
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300 }
40643
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301 PyDict_SetItemString(dict, "Error", pysqlite_Error);
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302
42084
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303 if (!(pysqlite_Warning = PyErr_NewException(MODULE_NAME ".Warning", PyExc_Exception, NULL))) {
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304 goto error;
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305 }
40643
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306 PyDict_SetItemString(dict, "Warning", pysqlite_Warning);
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307
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308 /* Error subclasses */
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309
40643
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310 if (!(pysqlite_InterfaceError = PyErr_NewException(MODULE_NAME ".InterfaceError", pysqlite_Error, NULL))) {
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311 goto error;
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312 }
40643
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313 PyDict_SetItemString(dict, "InterfaceError", pysqlite_InterfaceError);
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314
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315 if (!(pysqlite_DatabaseError = PyErr_NewException(MODULE_NAME ".DatabaseError", pysqlite_Error, NULL))) {
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316 goto error;
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317 }
40643
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318 PyDict_SetItemString(dict, "DatabaseError", pysqlite_DatabaseError);
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319
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320 /* pysqlite_DatabaseError subclasses */
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321
40643
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322 if (!(pysqlite_InternalError = PyErr_NewException(MODULE_NAME ".InternalError", pysqlite_DatabaseError, NULL))) {
37879
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323 goto error;
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diff changeset
324 }
40643
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diff changeset
325 PyDict_SetItemString(dict, "InternalError", pysqlite_InternalError);
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326
40643
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327 if (!(pysqlite_OperationalError = PyErr_NewException(MODULE_NAME ".OperationalError", pysqlite_DatabaseError, NULL))) {
37879
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328 goto error;
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329 }
40643
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330 PyDict_SetItemString(dict, "OperationalError", pysqlite_OperationalError);
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331
40643
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diff changeset
332 if (!(pysqlite_ProgrammingError = PyErr_NewException(MODULE_NAME ".ProgrammingError", pysqlite_DatabaseError, NULL))) {
37879
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333 goto error;
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parents:
diff changeset
334 }
40643
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diff changeset
335 PyDict_SetItemString(dict, "ProgrammingError", pysqlite_ProgrammingError);
37879
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336
40643
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diff changeset
337 if (!(pysqlite_IntegrityError = PyErr_NewException(MODULE_NAME ".IntegrityError", pysqlite_DatabaseError,NULL))) {
37879
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338 goto error;
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parents:
diff changeset
339 }
40643
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diff changeset
340 PyDict_SetItemString(dict, "IntegrityError", pysqlite_IntegrityError);
37879
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341
40643
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diff changeset
342 if (!(pysqlite_DataError = PyErr_NewException(MODULE_NAME ".DataError", pysqlite_DatabaseError, NULL))) {
37879
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343 goto error;
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
344 }
40643
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diff changeset
345 PyDict_SetItemString(dict, "DataError", pysqlite_DataError);
37879
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346
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diff changeset
347 if (!(pysqlite_NotSupportedError = PyErr_NewException(MODULE_NAME ".NotSupportedError", pysqlite_DatabaseError, NULL))) {
37879
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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348 goto error;
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parents:
diff changeset
349 }
40643
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diff changeset
350 PyDict_SetItemString(dict, "NotSupportedError", pysqlite_NotSupportedError);
37879
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351
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diff changeset
352 /* We just need "something" unique for pysqlite_OptimizedUnicode. It does not really
37879
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diff changeset
353 * need to be a string subclass. Just anything that can act as a special
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354 * marker for us. So I pulled PyCell_Type out of my magic hat.
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diff changeset
355 */
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diff changeset
356 Py_INCREF((PyObject*)&PyCell_Type);
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diff changeset
357 pysqlite_OptimizedUnicode = (PyObject*)&PyCell_Type;
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diff changeset
358 PyDict_SetItemString(dict, "OptimizedUnicode", pysqlite_OptimizedUnicode);
37879
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diff changeset
359
39442
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diff changeset
360 /* Set integer constants */
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diff changeset
361 for (i = 0; _int_constants[i].constant_name != 0; i++) {
44099
f324631462a2 Cleanup: Replaced most PyInt_ aliases with PyLong_ and disabled the aliases in intobject.h
Christian Heimes <christian@cheimes.de>
parents: 43777
diff changeset
362 tmp_obj = PyLong_FromLong(_int_constants[i].constant_value);
39442
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diff changeset
363 if (!tmp_obj) {
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diff changeset
364 goto error;
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365 }
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366 PyDict_SetItemString(dict, _int_constants[i].constant_name, tmp_obj);
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367 Py_DECREF(tmp_obj);
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368 }
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369
43694
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370 if (!(tmp_obj = PyUnicode_FromString(PYSQLITE_VERSION))) {
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371 goto error;
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372 }
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373 PyDict_SetItemString(dict, "version", tmp_obj);
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374 Py_DECREF(tmp_obj);
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375
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376 if (!(tmp_obj = PyUnicode_FromString(sqlite3_libversion()))) {
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377 goto error;
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378 }
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379 PyDict_SetItemString(dict, "sqlite_version", tmp_obj);
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380 Py_DECREF(tmp_obj);
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381
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382 /* initialize microprotocols layer */
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383 microprotocols_init(dict);
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384
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385 /* initialize the default converters */
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386 converters_init(dict);
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387
39442
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388 _enable_callback_tracebacks = 0;
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389
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390 pysqlite_BaseTypeAdapted = 0;
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391
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392 /* Original comment form _bsddb.c in the Python core. This is also still
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393 * needed nowadays for Python 2.3/2.4.
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394 *
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395 * PyEval_InitThreads is called here due to a quirk in python 1.5
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396 * - 2.2.1 (at least) according to Russell Williamson <merel@wt.net>:
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397 * The global interepreter lock is not initialized until the first
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398 * thread is created using thread.start_new_thread() or fork() is
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399 * called. that would cause the ALLOW_THREADS here to segfault due
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400 * to a null pointer reference if no threads or child processes
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401 * have been created. This works around that and is a no-op if
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402 * threads have already been initialized.
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403 * (see pybsddb-users mailing list post on 2002-08-07)
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404 */
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405 PyEval_InitThreads();
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406
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407 error:
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408 if (PyErr_Occurred())
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409 {
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410 PyErr_SetString(PyExc_ImportError, MODULE_NAME ": init failed");
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411 }
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412 }