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1 /**
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2 * Palantir - 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 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "Statement.h"
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22
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23 #include "Connection.h"
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24 #include "../Toolbox.h"
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25
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26 #include <boost/lexical_cast.hpp>
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27 #include <sqlite3.h>
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28 #include <string.h>
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29
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30 namespace Palantir
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31 {
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32 namespace SQLite
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33 {
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34 int Statement::CheckError(int err) const
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35 {
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36 bool succeeded = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE);
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37 if (!succeeded)
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38 {
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39 throw PalantirException("SQLite error code " + boost::lexical_cast<std::string>(err));
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40 }
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41
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42 return err;
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43 }
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44
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45 void Statement::CheckOk(int err) const
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46 {
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47 if (err == SQLITE_RANGE)
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48 {
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49 // Binding to a non-existent variable is evidence of a serious error.
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50 throw PalantirException("Bind value out of range");
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51 }
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52 else if (err != SQLITE_OK)
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53 {
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54 throw PalantirException("SQLite error code " + boost::lexical_cast<std::string>(err));
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55 }
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56 }
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57
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58
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59 Statement::Statement(Connection& database,
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60 const StatementId& id,
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61 const std::string& sql) :
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62 reference_(database.GetCachedStatement(id, sql.c_str()))
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63 {
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64 Reset(true);
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65 }
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66
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67
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68 Statement::Statement(Connection& database,
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69 const StatementId& id,
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70 const char* sql) :
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71 reference_(database.GetCachedStatement(id, sql))
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72 {
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73 Reset(true);
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74 }
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75
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76
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77 Statement::Statement(Connection& database,
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78 const std::string& sql) :
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79 reference_(database.GetWrappedObject(), sql.c_str())
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80 {
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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 char* sql) :
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86 reference_(database.GetWrappedObject(), sql)
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87 {
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88 }
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89
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90
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91 bool Statement::Run()
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92 {
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93 return CheckError(sqlite3_step(GetStatement())) == SQLITE_DONE;
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94 }
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95
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96 bool Statement::Step()
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97 {
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98 return CheckError(sqlite3_step(GetStatement())) == SQLITE_ROW;
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99 }
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100
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101 void Statement::Reset(bool clear_bound_vars)
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102 {
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103 // We don't call CheckError() here because sqlite3_reset() returns
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104 // the last error that Step() caused thereby generating a second
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105 // spurious error callback.
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106 if (clear_bound_vars)
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107 sqlite3_clear_bindings(GetStatement());
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108 sqlite3_reset(GetStatement());
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109 }
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110
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111 std::string Statement::GetOriginalSQLStatement()
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112 {
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113 return std::string(sqlite3_sql(GetStatement()));
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114 }
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115
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116
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117 void Statement::BindNull(int col)
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118 {
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119 CheckOk(sqlite3_bind_null(GetStatement(), col + 1));
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120 }
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121
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122 void Statement::BindBool(int col, bool val)
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123 {
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124 BindInt(col, val ? 1 : 0);
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125 }
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126
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127 void Statement::BindInt(int col, int val)
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128 {
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129 CheckOk(sqlite3_bind_int(GetStatement(), col + 1, val));
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130 }
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131
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132 void Statement::BindInt64(int col, int64_t val)
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133 {
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134 CheckOk(sqlite3_bind_int64(GetStatement(), col + 1, val));
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135 }
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136
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137 void Statement::BindDouble(int col, double val)
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138 {
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139 CheckOk(sqlite3_bind_double(GetStatement(), col + 1, val));
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140 }
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141
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142 void Statement::BindCString(int col, const char* val)
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143 {
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144 CheckOk(sqlite3_bind_text(GetStatement(), col + 1, val, -1, SQLITE_TRANSIENT));
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145 }
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146
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147 void Statement::BindString(int col, const std::string& val)
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148 {
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149 CheckOk(sqlite3_bind_text(GetStatement(),
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150 col + 1,
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151 val.data(),
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152 val.size(),
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153 SQLITE_TRANSIENT));
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154 }
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155
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156 /*void Statement::BindString16(int col, const string16& value)
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157 {
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158 BindString(col, UTF16ToUTF8(value));
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159 }*/
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160
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161 void Statement::BindBlob(int col, const void* val, int val_len)
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162 {
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163 CheckOk(sqlite3_bind_blob(GetStatement(), col + 1, val, val_len, SQLITE_TRANSIENT));
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164 }
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165
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166
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167 int Statement::ColumnCount() const
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168 {
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169 return sqlite3_column_count(GetStatement());
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170 }
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171
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172
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173 ColumnType Statement::GetColumnType(int col) const
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174 {
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175 // Verify that our enum matches sqlite's values.
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176 assert(COLUMN_TYPE_INTEGER == SQLITE_INTEGER);
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177 assert(COLUMN_TYPE_FLOAT == SQLITE_FLOAT);
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178 assert(COLUMN_TYPE_TEXT == SQLITE_TEXT);
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179 assert(COLUMN_TYPE_BLOB == SQLITE_BLOB);
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180 assert(COLUMN_TYPE_NULL == SQLITE_NULL);
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181
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182 return static_cast<ColumnType>(sqlite3_column_type(GetStatement(), col));
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183 }
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184
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185 ColumnType Statement::GetDeclaredColumnType(int col) const
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186 {
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187 std::string column_type(sqlite3_column_decltype(GetStatement(), col));
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188 Toolbox::ToLowerCase(column_type);
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189
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190 if (column_type == "integer")
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191 return COLUMN_TYPE_INTEGER;
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192 else if (column_type == "float")
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193 return COLUMN_TYPE_FLOAT;
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194 else if (column_type == "text")
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195 return COLUMN_TYPE_TEXT;
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196 else if (column_type == "blob")
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197 return COLUMN_TYPE_BLOB;
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198
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199 return COLUMN_TYPE_NULL;
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200 }
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201
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202 bool Statement::ColumnBool(int col) const
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203 {
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204 return !!ColumnInt(col);
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205 }
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206
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207 int Statement::ColumnInt(int col) const
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208 {
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209 return sqlite3_column_int(GetStatement(), col);
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210 }
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211
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212 int64_t Statement::ColumnInt64(int col) const
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213 {
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214 return sqlite3_column_int64(GetStatement(), col);
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215 }
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216
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217 double Statement::ColumnDouble(int col) const
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218 {
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219 return sqlite3_column_double(GetStatement(), col);
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220 }
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221
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222 std::string Statement::ColumnString(int col) const
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223 {
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224 const char* str = reinterpret_cast<const char*>(
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225 sqlite3_column_text(GetStatement(), col));
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226 int len = sqlite3_column_bytes(GetStatement(), col);
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227
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228 std::string result;
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229 if (str && len > 0)
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230 result.assign(str, len);
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231 return result;
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232 }
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233
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234 /*string16 Statement::ColumnString16(int col) const
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235 {
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236 std::string s = ColumnString(col);
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237 return !s.empty() ? UTF8ToUTF16(s) : string16();
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238 }*/
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239
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240 int Statement::ColumnByteLength(int col) const
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241 {
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242 return sqlite3_column_bytes(GetStatement(), col);
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243 }
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244
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245 const void* Statement::ColumnBlob(int col) const
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246 {
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247 return sqlite3_column_blob(GetStatement(), col);
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248 }
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249
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250 bool Statement::ColumnBlobAsString(int col, std::string* blob)
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251 {
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252 const void* p = ColumnBlob(col);
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253 size_t len = ColumnByteLength(col);
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254 blob->resize(len);
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255 if (blob->size() != len) {
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256 return false;
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257 }
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258 blob->assign(reinterpret_cast<const char*>(p), len);
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259 return true;
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260 }
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261
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262 /*bool Statement::ColumnBlobAsString16(int col, string16* val) const
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263 {
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264 const void* data = ColumnBlob(col);
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265 size_t len = ColumnByteLength(col) / sizeof(char16);
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266 val->resize(len);
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267 if (val->size() != len)
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268 return false;
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269 val->assign(reinterpret_cast<const char16*>(data), len);
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270 return true;
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271 }*/
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272
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273 bool Statement::ColumnBlobAsVector(int col, std::vector<char>* val) const
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274 {
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275 val->clear();
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276
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277 const void* data = sqlite3_column_blob(GetStatement(), col);
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278 int len = sqlite3_column_bytes(GetStatement(), col);
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279 if (data && len > 0) {
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280 val->resize(len);
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281 memcpy(&(*val)[0], data, len);
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282 }
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283 return true;
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284 }
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285
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286 bool Statement::ColumnBlobAsVector(
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287 int col,
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288 std::vector<unsigned char>* val) const
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289 {
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290 return ColumnBlobAsVector(col, reinterpret_cast< std::vector<char>* >(val));
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291 }
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292
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293 }
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294 }
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