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comparison Orthanc/Core/SQLite/Statement.cpp @ 25:15acbf5e7545

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refactoring
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 02 Jun 2015 11:16:30 +0200
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children b3259b9c6dfb
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24:ed9acb0f938e 25:15acbf5e7545
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 *
4 * Copyright (C) 2012-2015 Sebastien Jodogne <s.jodogne@gmail.com>,
5 * Medical Physics Department, CHU of Liege, Belgium
6 *
7 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
11 * met:
12 *
13 * * Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 * * Neither the name of Google Inc., the name of the CHU of Liege,
20 * nor the names of its contributors may be used to endorse or promote
21 * products derived from this software without specific prior written
22 * permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 **/
36
37
38 #if ORTHANC_SQLITE_STANDALONE != 1
39 #include "../PrecompiledHeaders.h"
40 #endif
41
42 #include "Statement.h"
43 #include "Connection.h"
44
45 #include <sqlite3.h>
46 #include <string.h>
47 #include <stdio.h>
48 #include <algorithm>
49
50 #if ORTHANC_SQLITE_STANDALONE != 1
51 #include <glog/logging.h>
52 #endif
53
54 #if defined(_MSC_VER)
55 #define snprintf _snprintf
56 #endif
57
58 namespace Orthanc
59 {
60 namespace SQLite
61 {
62 int Statement::CheckError(int err) const
63 {
64 bool succeeded = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE);
65 if (!succeeded)
66 {
67 char buffer[128];
68 snprintf(buffer, sizeof(buffer) - 1, "SQLite error code %d", err);
69 throw OrthancSQLiteException(buffer);
70 }
71
72 return err;
73 }
74
75 void Statement::CheckOk(int err) const
76 {
77 if (err == SQLITE_RANGE)
78 {
79 // Binding to a non-existent variable is evidence of a serious error.
80 throw OrthancSQLiteException("Bind value out of range");
81 }
82 else if (err != SQLITE_OK)
83 {
84 char buffer[128];
85 snprintf(buffer, sizeof(buffer) - 1, "SQLite error code %d", err);
86 throw OrthancSQLiteException(buffer);
87 }
88 }
89
90
91 Statement::Statement(Connection& database,
92 const StatementId& id,
93 const std::string& sql) :
94 reference_(database.GetCachedStatement(id, sql.c_str()))
95 {
96 Reset(true);
97 }
98
99
100 Statement::Statement(Connection& database,
101 const StatementId& id,
102 const char* sql) :
103 reference_(database.GetCachedStatement(id, sql))
104 {
105 Reset(true);
106 }
107
108
109 Statement::Statement(Connection& database,
110 const std::string& sql) :
111 reference_(database.GetWrappedObject(), sql.c_str())
112 {
113 }
114
115
116 Statement::Statement(Connection& database,
117 const char* sql) :
118 reference_(database.GetWrappedObject(), sql)
119 {
120 }
121
122
123 bool Statement::Run()
124 {
125 #if ORTHANC_SQLITE_STANDALONE != 1
126 VLOG(1) << "SQLite::Statement::Run " << sqlite3_sql(GetStatement());
127 #endif
128
129 return CheckError(sqlite3_step(GetStatement())) == SQLITE_DONE;
130 }
131
132 bool Statement::Step()
133 {
134 #if ORTHANC_SQLITE_STANDALONE != 1
135 VLOG(1) << "SQLite::Statement::Step " << sqlite3_sql(GetStatement());
136 #endif
137
138 return CheckError(sqlite3_step(GetStatement())) == SQLITE_ROW;
139 }
140
141 void Statement::Reset(bool clear_bound_vars)
142 {
143 // We don't call CheckError() here because sqlite3_reset() returns
144 // the last error that Step() caused thereby generating a second
145 // spurious error callback.
146 if (clear_bound_vars)
147 sqlite3_clear_bindings(GetStatement());
148 //VLOG(1) << "SQLite::Statement::Reset";
149 sqlite3_reset(GetStatement());
150 }
151
152 std::string Statement::GetOriginalSQLStatement()
153 {
154 return std::string(sqlite3_sql(GetStatement()));
155 }
156
157
158 void Statement::BindNull(int col)
159 {
160 CheckOk(sqlite3_bind_null(GetStatement(), col + 1));
161 }
162
163 void Statement::BindBool(int col, bool val)
164 {
165 BindInt(col, val ? 1 : 0);
166 }
167
168 void Statement::BindInt(int col, int val)
169 {
170 CheckOk(sqlite3_bind_int(GetStatement(), col + 1, val));
171 }
172
173 void Statement::BindInt64(int col, int64_t val)
174 {
175 CheckOk(sqlite3_bind_int64(GetStatement(), col + 1, val));
176 }
177
178 void Statement::BindDouble(int col, double val)
179 {
180 CheckOk(sqlite3_bind_double(GetStatement(), col + 1, val));
181 }
182
183 void Statement::BindCString(int col, const char* val)
184 {
185 CheckOk(sqlite3_bind_text(GetStatement(), col + 1, val, -1, SQLITE_TRANSIENT));
186 }
187
188 void Statement::BindString(int col, const std::string& val)
189 {
190 CheckOk(sqlite3_bind_text(GetStatement(),
191 col + 1,
192 val.data(),
193 val.size(),
194 SQLITE_TRANSIENT));
195 }
196
197 /*void Statement::BindString16(int col, const string16& value)
198 {
199 BindString(col, UTF16ToUTF8(value));
200 }*/
201
202 void Statement::BindBlob(int col, const void* val, int val_len)
203 {
204 CheckOk(sqlite3_bind_blob(GetStatement(), col + 1, val, val_len, SQLITE_TRANSIENT));
205 }
206
207
208 int Statement::ColumnCount() const
209 {
210 return sqlite3_column_count(GetStatement());
211 }
212
213
214 ColumnType Statement::GetColumnType(int col) const
215 {
216 // Verify that our enum matches sqlite's values.
217 assert(COLUMN_TYPE_INTEGER == SQLITE_INTEGER);
218 assert(COLUMN_TYPE_FLOAT == SQLITE_FLOAT);
219 assert(COLUMN_TYPE_TEXT == SQLITE_TEXT);
220 assert(COLUMN_TYPE_BLOB == SQLITE_BLOB);
221 assert(COLUMN_TYPE_NULL == SQLITE_NULL);
222
223 return static_cast<ColumnType>(sqlite3_column_type(GetStatement(), col));
224 }
225
226 ColumnType Statement::GetDeclaredColumnType(int col) const
227 {
228 std::string column_type(sqlite3_column_decltype(GetStatement(), col));
229 std::transform(column_type.begin(), column_type.end(), column_type.begin(), tolower);
230
231 if (column_type == "integer")
232 return COLUMN_TYPE_INTEGER;
233 else if (column_type == "float")
234 return COLUMN_TYPE_FLOAT;
235 else if (column_type == "text")
236 return COLUMN_TYPE_TEXT;
237 else if (column_type == "blob")
238 return COLUMN_TYPE_BLOB;
239
240 return COLUMN_TYPE_NULL;
241 }
242
243 bool Statement::ColumnIsNull(int col) const
244 {
245 return sqlite3_column_type(GetStatement(), col) == SQLITE_NULL;
246 }
247
248 bool Statement::ColumnBool(int col) const
249 {
250 return !!ColumnInt(col);
251 }
252
253 int Statement::ColumnInt(int col) const
254 {
255 return sqlite3_column_int(GetStatement(), col);
256 }
257
258 int64_t Statement::ColumnInt64(int col) const
259 {
260 return sqlite3_column_int64(GetStatement(), col);
261 }
262
263 double Statement::ColumnDouble(int col) const
264 {
265 return sqlite3_column_double(GetStatement(), col);
266 }
267
268 std::string Statement::ColumnString(int col) const
269 {
270 const char* str = reinterpret_cast<const char*>(
271 sqlite3_column_text(GetStatement(), col));
272 int len = sqlite3_column_bytes(GetStatement(), col);
273
274 std::string result;
275 if (str && len > 0)
276 result.assign(str, len);
277 return result;
278 }
279
280 /*string16 Statement::ColumnString16(int col) const
281 {
282 std::string s = ColumnString(col);
283 return !s.empty() ? UTF8ToUTF16(s) : string16();
284 }*/
285
286 int Statement::ColumnByteLength(int col) const
287 {
288 return sqlite3_column_bytes(GetStatement(), col);
289 }
290
291 const void* Statement::ColumnBlob(int col) const
292 {
293 return sqlite3_column_blob(GetStatement(), col);
294 }
295
296 bool Statement::ColumnBlobAsString(int col, std::string* blob)
297 {
298 const void* p = ColumnBlob(col);
299 size_t len = ColumnByteLength(col);
300 blob->resize(len);
301 if (blob->size() != len) {
302 return false;
303 }
304 blob->assign(reinterpret_cast<const char*>(p), len);
305 return true;
306 }
307
308 /*bool Statement::ColumnBlobAsString16(int col, string16* val) const
309 {
310 const void* data = ColumnBlob(col);
311 size_t len = ColumnByteLength(col) / sizeof(char16);
312 val->resize(len);
313 if (val->size() != len)
314 return false;
315 val->assign(reinterpret_cast<const char16*>(data), len);
316 return true;
317 }*/
318
319 /*bool Statement::ColumnBlobAsVector(int col, std::vector<char>* val) const
320 {
321 val->clear();
322
323 const void* data = sqlite3_column_blob(GetStatement(), col);
324 int len = sqlite3_column_bytes(GetStatement(), col);
325 if (data && len > 0) {
326 val->resize(len);
327 memcpy(&(*val)[0], data, len);
328 }
329 return true;
330 }*/
331
332 /*bool Statement::ColumnBlobAsVector(
333 int col,
334 std::vector<unsigned char>* val) const
335 {
336 return ColumnBlobAsVector(col, reinterpret_cast< std::vector<char>* >(val));
337 }*/
338
339 }
340 }