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1 /**
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2 * Palanthir - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are
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10 * met:
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11 *
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12 * * Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 * * Redistributions in binary form must reproduce the above
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15 * copyright notice, this list of conditions and the following disclaimer
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16 * in the documentation and/or other materials provided with the
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17 * distribution.
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18 * * Neither the name of Google Inc., the name of the CHU of Liege,
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19 * nor the names of its contributors may be used to endorse or promote
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20 * products derived from this software without specific prior written
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21 * permission.
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22 *
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23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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34 **/
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35
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36
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37 #include "Statement.h"
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38
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39 #include "Connection.h"
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40 #include "../Toolbox.h"
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41
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42 #include <boost/lexical_cast.hpp>
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43 #include <sqlite3.h>
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44 #include <string.h>
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45
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46 namespace Palanthir
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47 {
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48 namespace SQLite
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49 {
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50 int Statement::CheckError(int err) const
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51 {
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52 bool succeeded = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE);
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53 if (!succeeded)
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54 {
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55 throw PalanthirException("SQLite error code " + boost::lexical_cast<std::string>(err));
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56 }
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57
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58 return err;
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59 }
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60
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61 void Statement::CheckOk(int err) const
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62 {
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63 if (err == SQLITE_RANGE)
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64 {
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65 // Binding to a non-existent variable is evidence of a serious error.
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66 throw PalanthirException("Bind value out of range");
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67 }
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68 else if (err != SQLITE_OK)
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69 {
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70 throw PalanthirException("SQLite error code " + boost::lexical_cast<std::string>(err));
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71 }
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72 }
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73
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74
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75 Statement::Statement(Connection& database,
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76 const StatementId& id,
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77 const std::string& sql) :
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78 reference_(database.GetCachedStatement(id, sql.c_str()))
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79 {
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80 Reset(true);
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81 }
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82
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83
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84 Statement::Statement(Connection& database,
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85 const StatementId& id,
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86 const char* sql) :
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87 reference_(database.GetCachedStatement(id, sql))
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88 {
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89 Reset(true);
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90 }
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91
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92
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93 Statement::Statement(Connection& database,
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94 const std::string& sql) :
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95 reference_(database.GetWrappedObject(), sql.c_str())
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96 {
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97 }
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98
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99
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100 Statement::Statement(Connection& database,
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101 const char* sql) :
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102 reference_(database.GetWrappedObject(), sql)
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103 {
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104 }
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105
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106
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107 bool Statement::Run()
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108 {
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109 return CheckError(sqlite3_step(GetStatement())) == SQLITE_DONE;
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110 }
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111
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112 bool Statement::Step()
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113 {
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114 return CheckError(sqlite3_step(GetStatement())) == SQLITE_ROW;
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115 }
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116
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117 void Statement::Reset(bool clear_bound_vars)
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118 {
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119 // We don't call CheckError() here because sqlite3_reset() returns
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120 // the last error that Step() caused thereby generating a second
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121 // spurious error callback.
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122 if (clear_bound_vars)
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123 sqlite3_clear_bindings(GetStatement());
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124 sqlite3_reset(GetStatement());
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125 }
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126
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127 std::string Statement::GetOriginalSQLStatement()
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128 {
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129 return std::string(sqlite3_sql(GetStatement()));
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130 }
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131
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132
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133 void Statement::BindNull(int col)
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134 {
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135 CheckOk(sqlite3_bind_null(GetStatement(), col + 1));
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136 }
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137
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138 void Statement::BindBool(int col, bool val)
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139 {
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140 BindInt(col, val ? 1 : 0);
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141 }
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142
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143 void Statement::BindInt(int col, int val)
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144 {
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145 CheckOk(sqlite3_bind_int(GetStatement(), col + 1, val));
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146 }
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147
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148 void Statement::BindInt64(int col, int64_t val)
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149 {
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150 CheckOk(sqlite3_bind_int64(GetStatement(), col + 1, val));
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151 }
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152
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153 void Statement::BindDouble(int col, double val)
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154 {
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155 CheckOk(sqlite3_bind_double(GetStatement(), col + 1, val));
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156 }
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157
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158 void Statement::BindCString(int col, const char* val)
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159 {
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160 CheckOk(sqlite3_bind_text(GetStatement(), col + 1, val, -1, SQLITE_TRANSIENT));
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161 }
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162
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163 void Statement::BindString(int col, const std::string& val)
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164 {
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165 CheckOk(sqlite3_bind_text(GetStatement(),
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166 col + 1,
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167 val.data(),
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168 val.size(),
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169 SQLITE_TRANSIENT));
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170 }
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171
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172 /*void Statement::BindString16(int col, const string16& value)
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173 {
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174 BindString(col, UTF16ToUTF8(value));
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175 }*/
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176
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177 void Statement::BindBlob(int col, const void* val, int val_len)
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178 {
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179 CheckOk(sqlite3_bind_blob(GetStatement(), col + 1, val, val_len, SQLITE_TRANSIENT));
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180 }
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181
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182
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183 int Statement::ColumnCount() const
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184 {
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185 return sqlite3_column_count(GetStatement());
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186 }
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187
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188
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189 ColumnType Statement::GetColumnType(int col) const
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190 {
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191 // Verify that our enum matches sqlite's values.
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192 assert(COLUMN_TYPE_INTEGER == SQLITE_INTEGER);
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193 assert(COLUMN_TYPE_FLOAT == SQLITE_FLOAT);
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194 assert(COLUMN_TYPE_TEXT == SQLITE_TEXT);
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195 assert(COLUMN_TYPE_BLOB == SQLITE_BLOB);
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196 assert(COLUMN_TYPE_NULL == SQLITE_NULL);
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197
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198 return static_cast<ColumnType>(sqlite3_column_type(GetStatement(), col));
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199 }
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200
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201 ColumnType Statement::GetDeclaredColumnType(int col) const
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202 {
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203 std::string column_type(sqlite3_column_decltype(GetStatement(), col));
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204 Toolbox::ToLowerCase(column_type);
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205
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206 if (column_type == "integer")
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207 return COLUMN_TYPE_INTEGER;
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208 else if (column_type == "float")
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209 return COLUMN_TYPE_FLOAT;
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210 else if (column_type == "text")
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211 return COLUMN_TYPE_TEXT;
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212 else if (column_type == "blob")
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213 return COLUMN_TYPE_BLOB;
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214
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215 return COLUMN_TYPE_NULL;
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216 }
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217
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218 bool Statement::ColumnBool(int col) const
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219 {
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220 return !!ColumnInt(col);
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221 }
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222
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223 int Statement::ColumnInt(int col) const
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224 {
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225 return sqlite3_column_int(GetStatement(), col);
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226 }
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227
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228 int64_t Statement::ColumnInt64(int col) const
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229 {
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230 return sqlite3_column_int64(GetStatement(), col);
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231 }
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232
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233 double Statement::ColumnDouble(int col) const
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234 {
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235 return sqlite3_column_double(GetStatement(), col);
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236 }
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237
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238 std::string Statement::ColumnString(int col) const
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239 {
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240 const char* str = reinterpret_cast<const char*>(
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241 sqlite3_column_text(GetStatement(), col));
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242 int len = sqlite3_column_bytes(GetStatement(), col);
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243
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244 std::string result;
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245 if (str && len > 0)
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246 result.assign(str, len);
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247 return result;
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248 }
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249
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250 /*string16 Statement::ColumnString16(int col) const
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251 {
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252 std::string s = ColumnString(col);
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253 return !s.empty() ? UTF8ToUTF16(s) : string16();
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254 }*/
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255
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256 int Statement::ColumnByteLength(int col) const
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257 {
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258 return sqlite3_column_bytes(GetStatement(), col);
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259 }
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260
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261 const void* Statement::ColumnBlob(int col) const
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262 {
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263 return sqlite3_column_blob(GetStatement(), col);
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264 }
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265
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266 bool Statement::ColumnBlobAsString(int col, std::string* blob)
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267 {
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268 const void* p = ColumnBlob(col);
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269 size_t len = ColumnByteLength(col);
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270 blob->resize(len);
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271 if (blob->size() != len) {
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272 return false;
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273 }
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274 blob->assign(reinterpret_cast<const char*>(p), len);
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275 return true;
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276 }
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277
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278 /*bool Statement::ColumnBlobAsString16(int col, string16* val) const
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279 {
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280 const void* data = ColumnBlob(col);
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281 size_t len = ColumnByteLength(col) / sizeof(char16);
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282 val->resize(len);
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283 if (val->size() != len)
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284 return false;
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285 val->assign(reinterpret_cast<const char16*>(data), len);
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286 return true;
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287 }*/
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288
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289 bool Statement::ColumnBlobAsVector(int col, std::vector<char>* val) const
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290 {
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291 val->clear();
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292
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293 const void* data = sqlite3_column_blob(GetStatement(), col);
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294 int len = sqlite3_column_bytes(GetStatement(), col);
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295 if (data && len > 0) {
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296 val->resize(len);
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297 memcpy(&(*val)[0], data, len);
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298 }
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299 return true;
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300 }
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301
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302 bool Statement::ColumnBlobAsVector(
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303 int col,
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304 std::vector<unsigned char>* val) const
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305 {
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306 return ColumnBlobAsVector(col, reinterpret_cast< std::vector<char>* >(val));
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307 }
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308
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309 }
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310 }
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