Botan  2.11.0
Crypto and TLS for C++11
sqlite3.cpp
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1 /*
2 * SQLite wrapper
3 * (C) 2012 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #include <botan/sqlite3.h>
9 #include <botan/exceptn.h>
10 #include <botan/mem_ops.h>
11 #include <sqlite3.h>
12 
13 namespace Botan {
14 
15 Sqlite3_Database::Sqlite3_Database(const std::string& db_filename)
16  {
17  int rc = ::sqlite3_open(db_filename.c_str(), &m_db);
18 
19  if(rc)
20  {
21  const std::string err_msg = ::sqlite3_errmsg(m_db);
22  ::sqlite3_close(m_db);
23  m_db = nullptr;
24  throw SQL_DB_Error("sqlite3_open failed - " + err_msg);
25  }
26  }
27 
28 Sqlite3_Database::~Sqlite3_Database()
29  {
30  if(m_db)
31  ::sqlite3_close(m_db);
32  m_db = nullptr;
33  }
34 
35 std::shared_ptr<SQL_Database::Statement> Sqlite3_Database::new_statement(const std::string& base_sql) const
36  {
37  return std::make_shared<Sqlite3_Statement>(m_db, base_sql);
38  }
39 
40 size_t Sqlite3_Database::row_count(const std::string& table_name)
41  {
42  auto stmt = new_statement("select count(*) from " + table_name);
43 
44  if(stmt->step())
45  return stmt->get_size_t(0);
46  else
47  throw SQL_DB_Error("Querying size of table " + table_name + " failed");
48  }
49 
50 void Sqlite3_Database::create_table(const std::string& table_schema)
51  {
52  char* errmsg = nullptr;
53  int rc = ::sqlite3_exec(m_db, table_schema.c_str(), nullptr, nullptr, &errmsg);
54 
55  if(rc != SQLITE_OK)
56  {
57  const std::string err_msg = errmsg;
58  ::sqlite3_free(errmsg);
59  ::sqlite3_close(m_db);
60  m_db = nullptr;
61  throw SQL_DB_Error("sqlite3_exec for table failed - " + err_msg);
62  }
63  }
64 
65 Sqlite3_Database::Sqlite3_Statement::Sqlite3_Statement(sqlite3* db, const std::string& base_sql)
66  {
67  int rc = ::sqlite3_prepare_v2(db, base_sql.c_str(), -1, &m_stmt, nullptr);
68 
69  if(rc != SQLITE_OK)
70  throw SQL_DB_Error("sqlite3_prepare failed on " + base_sql, rc);
71  }
72 
73 void Sqlite3_Database::Sqlite3_Statement::bind(int column, const std::string& val)
74  {
75  int rc = ::sqlite3_bind_text(m_stmt, column, val.c_str(), -1, SQLITE_TRANSIENT);
76  if(rc != SQLITE_OK)
77  throw SQL_DB_Error("sqlite3_bind_text failed", rc);
78  }
79 
80 void Sqlite3_Database::Sqlite3_Statement::bind(int column, size_t val)
81  {
82  if(val != static_cast<size_t>(static_cast<int>(val))) // is this cast legit?
83  throw SQL_DB_Error("sqlite3 cannot store " + std::to_string(val) + " without truncation");
84  int rc = ::sqlite3_bind_int(m_stmt, column, val);
85  if(rc != SQLITE_OK)
86  throw SQL_DB_Error("sqlite3_bind_int failed", rc);
87  }
88 
89 void Sqlite3_Database::Sqlite3_Statement::bind(int column, std::chrono::system_clock::time_point time)
90  {
91  const int timeval = std::chrono::duration_cast<std::chrono::seconds>(time.time_since_epoch()).count();
92  bind(column, timeval);
93  }
94 
95 void Sqlite3_Database::Sqlite3_Statement::bind(int column, const std::vector<uint8_t>& val)
96  {
97  int rc = ::sqlite3_bind_blob(m_stmt, column, val.data(), val.size(), SQLITE_TRANSIENT);
98  if(rc != SQLITE_OK)
99  throw SQL_DB_Error("sqlite3_bind_text failed", rc);
100  }
101 
102 void Sqlite3_Database::Sqlite3_Statement::bind(int column, const uint8_t* p, size_t len)
103  {
104  int rc = ::sqlite3_bind_blob(m_stmt, column, p, len, SQLITE_TRANSIENT);
105  if(rc != SQLITE_OK)
106  throw SQL_DB_Error("sqlite3_bind_text failed", rc);
107  }
108 
109 std::pair<const uint8_t*, size_t> Sqlite3_Database::Sqlite3_Statement::get_blob(int column)
110  {
111  BOTAN_ASSERT(::sqlite3_column_type(m_stmt, column) == SQLITE_BLOB,
112  "Return value is a blob");
113 
114  const void* session_blob = ::sqlite3_column_blob(m_stmt, column);
115  const int session_blob_size = ::sqlite3_column_bytes(m_stmt, column);
116 
117  BOTAN_ASSERT(session_blob_size >= 0, "Blob size is non-negative");
118 
119  return std::make_pair(static_cast<const uint8_t*>(session_blob),
120  static_cast<size_t>(session_blob_size));
121  }
122 
123 std::string Sqlite3_Database::Sqlite3_Statement::get_str(int column)
124  {
125  BOTAN_ASSERT(::sqlite3_column_type(m_stmt, column) == SQLITE_TEXT,
126  "Return value is text");
127 
128  const unsigned char* str = ::sqlite3_column_text(m_stmt, column);
129 
130  return std::string(cast_uint8_ptr_to_char(str));
131  }
132 
133 size_t Sqlite3_Database::Sqlite3_Statement::get_size_t(int column)
134  {
135  BOTAN_ASSERT(::sqlite3_column_type(m_stmt, column) == SQLITE_INTEGER,
136  "Return count is an integer");
137 
138  const int sessions_int = ::sqlite3_column_int(m_stmt, column);
139 
140  BOTAN_ASSERT(sessions_int >= 0, "Expected size_t is non-negative");
141 
142  return static_cast<size_t>(sessions_int);
143  }
144 
145 size_t Sqlite3_Database::Sqlite3_Statement::spin()
146  {
147  size_t steps = 0;
148  while(step())
149  {
150  ++steps;
151  }
152 
153  return steps;
154  }
155 
156 bool Sqlite3_Database::Sqlite3_Statement::step()
157  {
158  return (::sqlite3_step(m_stmt) == SQLITE_ROW);
159  }
160 
161 Sqlite3_Database::Sqlite3_Statement::~Sqlite3_Statement()
162  {
163  ::sqlite3_finalize(m_stmt);
164  }
165 
166 }
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