base/mysql.cc

   1 /*
   2  * Copyright (c) 2003-2004 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <iostream>
  30
  31 #include "base/mysql.hh"
  32 #include "base/trace.hh"
  33
  34 using namespace std;
  35
  36 namespace MySQL {
  37
  38 inline const char *
  39 charstar(const string &string)
  40 {
  41     return string.empty() ? NULL : string.c_str();
  42 }
  43
  44 ostream &
  45 operator<<(ostream &stream, const Error &error)
  46 {
  47     stream << error.string();
  48     return stream;
  49 }
  50
  51 /*
  52  * The connection class
  53  */
  54 Connection::Connection()
  55     : valid(false)
  56 {
  57 }
  58
  59 Connection::~Connection()
  60 {
  61     if (valid)
  62         close();
  63 }
  64
  65
  66 bool
  67 Connection::connect(const string &xhost, const string &xuser,
  68                     const string &xpasswd, const string &xdatabase)
  69 {
  70     if (connected())
  71         return error.set("Already Connected");
  72
  73     _host = xhost;
  74     _user = xuser;
  75     _passwd = xpasswd;
  76     _database = xdatabase;
  77
  78     error.clear();
  79
  80     mysql_init(&mysql);
  81     mysql_options(&mysql, MYSQL_OPT_COMPRESS, 0); // might want to be 1
  82     mysql_options(&mysql, MYSQL_READ_DEFAULT_GROUP, "odbc");
  83     if (!mysql_real_connect(&mysql, charstar(_host), charstar(_user),
  84                             charstar(_passwd), charstar(_database),
  85                             0, NULL, 0))
  86         return error.set(mysql_error(&mysql));
  87
  88     valid = true;
  89     return false;
  90 }
  91
  92 void
  93 Connection::close()
  94 {
  95     mysql_close(&mysql);
  96 }
  97
  98 bool
  99 Connection::query(const string &sql)
 100 {
 101     DPRINTF(SQL, "Sending SQL query to server:\n%s", sql);
 102     error.clear();
 103     if (mysql_real_query(&mysql, sql.c_str(), sql.size()))
 104         error.set(mysql_error(&mysql));
 105
 106     return error;
 107 }
 108
 109
 110 /* namespace MySQL */ }