Mercurial > hg > orthanc
comparison Core/SQLite/Statement.cpp @ 0:3959d33612cc
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 19 Jul 2012 14:32:22 +0200 |
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children | db4d996ea264 |
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1 /** | |
2 * Palantir - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege, | |
4 * Belgium | |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * This program is distributed in the hope that it will be useful, but | |
12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 * General Public License for more details. | |
15 * | |
16 * You should have received a copy of the GNU General Public License | |
17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 **/ | |
19 | |
20 | |
21 #include "Statement.h" | |
22 | |
23 #include "Connection.h" | |
24 #include "../Toolbox.h" | |
25 | |
26 #include <boost/lexical_cast.hpp> | |
27 #include <sqlite3.h> | |
28 #include <string.h> | |
29 | |
30 namespace Palantir | |
31 { | |
32 namespace SQLite | |
33 { | |
34 int Statement::CheckError(int err) const | |
35 { | |
36 bool succeeded = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE); | |
37 if (!succeeded) | |
38 { | |
39 throw PalantirException("SQLite error code " + boost::lexical_cast<std::string>(err)); | |
40 } | |
41 | |
42 return err; | |
43 } | |
44 | |
45 void Statement::CheckOk(int err) const | |
46 { | |
47 if (err == SQLITE_RANGE) | |
48 { | |
49 // Binding to a non-existent variable is evidence of a serious error. | |
50 throw PalantirException("Bind value out of range"); | |
51 } | |
52 else if (err != SQLITE_OK) | |
53 { | |
54 throw PalantirException("SQLite error code " + boost::lexical_cast<std::string>(err)); | |
55 } | |
56 } | |
57 | |
58 | |
59 Statement::Statement(Connection& database, | |
60 const StatementId& id, | |
61 const std::string& sql) : | |
62 reference_(database.GetCachedStatement(id, sql.c_str())) | |
63 { | |
64 Reset(true); | |
65 } | |
66 | |
67 | |
68 Statement::Statement(Connection& database, | |
69 const StatementId& id, | |
70 const char* sql) : | |
71 reference_(database.GetCachedStatement(id, sql)) | |
72 { | |
73 Reset(true); | |
74 } | |
75 | |
76 | |
77 Statement::Statement(Connection& database, | |
78 const std::string& sql) : | |
79 reference_(database.GetWrappedObject(), sql.c_str()) | |
80 { | |
81 } | |
82 | |
83 | |
84 Statement::Statement(Connection& database, | |
85 const char* sql) : | |
86 reference_(database.GetWrappedObject(), sql) | |
87 { | |
88 } | |
89 | |
90 | |
91 bool Statement::Run() | |
92 { | |
93 return CheckError(sqlite3_step(GetStatement())) == SQLITE_DONE; | |
94 } | |
95 | |
96 bool Statement::Step() | |
97 { | |
98 return CheckError(sqlite3_step(GetStatement())) == SQLITE_ROW; | |
99 } | |
100 | |
101 void Statement::Reset(bool clear_bound_vars) | |
102 { | |
103 // We don't call CheckError() here because sqlite3_reset() returns | |
104 // the last error that Step() caused thereby generating a second | |
105 // spurious error callback. | |
106 if (clear_bound_vars) | |
107 sqlite3_clear_bindings(GetStatement()); | |
108 sqlite3_reset(GetStatement()); | |
109 } | |
110 | |
111 std::string Statement::GetOriginalSQLStatement() | |
112 { | |
113 return std::string(sqlite3_sql(GetStatement())); | |
114 } | |
115 | |
116 | |
117 void Statement::BindNull(int col) | |
118 { | |
119 CheckOk(sqlite3_bind_null(GetStatement(), col + 1)); | |
120 } | |
121 | |
122 void Statement::BindBool(int col, bool val) | |
123 { | |
124 BindInt(col, val ? 1 : 0); | |
125 } | |
126 | |
127 void Statement::BindInt(int col, int val) | |
128 { | |
129 CheckOk(sqlite3_bind_int(GetStatement(), col + 1, val)); | |
130 } | |
131 | |
132 void Statement::BindInt64(int col, int64_t val) | |
133 { | |
134 CheckOk(sqlite3_bind_int64(GetStatement(), col + 1, val)); | |
135 } | |
136 | |
137 void Statement::BindDouble(int col, double val) | |
138 { | |
139 CheckOk(sqlite3_bind_double(GetStatement(), col + 1, val)); | |
140 } | |
141 | |
142 void Statement::BindCString(int col, const char* val) | |
143 { | |
144 CheckOk(sqlite3_bind_text(GetStatement(), col + 1, val, -1, SQLITE_TRANSIENT)); | |
145 } | |
146 | |
147 void Statement::BindString(int col, const std::string& val) | |
148 { | |
149 CheckOk(sqlite3_bind_text(GetStatement(), | |
150 col + 1, | |
151 val.data(), | |
152 val.size(), | |
153 SQLITE_TRANSIENT)); | |
154 } | |
155 | |
156 /*void Statement::BindString16(int col, const string16& value) | |
157 { | |
158 BindString(col, UTF16ToUTF8(value)); | |
159 }*/ | |
160 | |
161 void Statement::BindBlob(int col, const void* val, int val_len) | |
162 { | |
163 CheckOk(sqlite3_bind_blob(GetStatement(), col + 1, val, val_len, SQLITE_TRANSIENT)); | |
164 } | |
165 | |
166 | |
167 int Statement::ColumnCount() const | |
168 { | |
169 return sqlite3_column_count(GetStatement()); | |
170 } | |
171 | |
172 | |
173 ColumnType Statement::GetColumnType(int col) const | |
174 { | |
175 // Verify that our enum matches sqlite's values. | |
176 assert(COLUMN_TYPE_INTEGER == SQLITE_INTEGER); | |
177 assert(COLUMN_TYPE_FLOAT == SQLITE_FLOAT); | |
178 assert(COLUMN_TYPE_TEXT == SQLITE_TEXT); | |
179 assert(COLUMN_TYPE_BLOB == SQLITE_BLOB); | |
180 assert(COLUMN_TYPE_NULL == SQLITE_NULL); | |
181 | |
182 return static_cast<ColumnType>(sqlite3_column_type(GetStatement(), col)); | |
183 } | |
184 | |
185 ColumnType Statement::GetDeclaredColumnType(int col) const | |
186 { | |
187 std::string column_type(sqlite3_column_decltype(GetStatement(), col)); | |
188 Toolbox::ToLowerCase(column_type); | |
189 | |
190 if (column_type == "integer") | |
191 return COLUMN_TYPE_INTEGER; | |
192 else if (column_type == "float") | |
193 return COLUMN_TYPE_FLOAT; | |
194 else if (column_type == "text") | |
195 return COLUMN_TYPE_TEXT; | |
196 else if (column_type == "blob") | |
197 return COLUMN_TYPE_BLOB; | |
198 | |
199 return COLUMN_TYPE_NULL; | |
200 } | |
201 | |
202 bool Statement::ColumnBool(int col) const | |
203 { | |
204 return !!ColumnInt(col); | |
205 } | |
206 | |
207 int Statement::ColumnInt(int col) const | |
208 { | |
209 return sqlite3_column_int(GetStatement(), col); | |
210 } | |
211 | |
212 int64_t Statement::ColumnInt64(int col) const | |
213 { | |
214 return sqlite3_column_int64(GetStatement(), col); | |
215 } | |
216 | |
217 double Statement::ColumnDouble(int col) const | |
218 { | |
219 return sqlite3_column_double(GetStatement(), col); | |
220 } | |
221 | |
222 std::string Statement::ColumnString(int col) const | |
223 { | |
224 const char* str = reinterpret_cast<const char*>( | |
225 sqlite3_column_text(GetStatement(), col)); | |
226 int len = sqlite3_column_bytes(GetStatement(), col); | |
227 | |
228 std::string result; | |
229 if (str && len > 0) | |
230 result.assign(str, len); | |
231 return result; | |
232 } | |
233 | |
234 /*string16 Statement::ColumnString16(int col) const | |
235 { | |
236 std::string s = ColumnString(col); | |
237 return !s.empty() ? UTF8ToUTF16(s) : string16(); | |
238 }*/ | |
239 | |
240 int Statement::ColumnByteLength(int col) const | |
241 { | |
242 return sqlite3_column_bytes(GetStatement(), col); | |
243 } | |
244 | |
245 const void* Statement::ColumnBlob(int col) const | |
246 { | |
247 return sqlite3_column_blob(GetStatement(), col); | |
248 } | |
249 | |
250 bool Statement::ColumnBlobAsString(int col, std::string* blob) | |
251 { | |
252 const void* p = ColumnBlob(col); | |
253 size_t len = ColumnByteLength(col); | |
254 blob->resize(len); | |
255 if (blob->size() != len) { | |
256 return false; | |
257 } | |
258 blob->assign(reinterpret_cast<const char*>(p), len); | |
259 return true; | |
260 } | |
261 | |
262 /*bool Statement::ColumnBlobAsString16(int col, string16* val) const | |
263 { | |
264 const void* data = ColumnBlob(col); | |
265 size_t len = ColumnByteLength(col) / sizeof(char16); | |
266 val->resize(len); | |
267 if (val->size() != len) | |
268 return false; | |
269 val->assign(reinterpret_cast<const char16*>(data), len); | |
270 return true; | |
271 }*/ | |
272 | |
273 bool Statement::ColumnBlobAsVector(int col, std::vector<char>* val) const | |
274 { | |
275 val->clear(); | |
276 | |
277 const void* data = sqlite3_column_blob(GetStatement(), col); | |
278 int len = sqlite3_column_bytes(GetStatement(), col); | |
279 if (data && len > 0) { | |
280 val->resize(len); | |
281 memcpy(&(*val)[0], data, len); | |
282 } | |
283 return true; | |
284 } | |
285 | |
286 bool Statement::ColumnBlobAsVector( | |
287 int col, | |
288 std::vector<unsigned char>* val) const | |
289 { | |
290 return ColumnBlobAsVector(col, reinterpret_cast< std::vector<char>* >(val)); | |
291 } | |
292 | |
293 } | |
294 } |