src/base/mysql.cc

   1 /*
   2  * Copyright (c) 2004-2005 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  * Authors: Nathan Binkert
  29  */
  30
  31 #include <iostream>
  32
  33 #include "base/mysql.hh"
  34 #include "base/trace.hh"
  35
  36 using namespace std;
  37
  38 namespace MySQL {
  39
  40 inline const char *
  41 charstar(const string &string)
  42 {
  43     return string.empty() ? NULL : string.c_str();
  44 }
  45
  46 ostream &
  47 operator<<(ostream &stream, const Error &error)
  48 {
  49     stream << error.string();
  50     return stream;
  51 }
  52
  53 /*
  54  * The connection class
  55  */
  56 Connection::Connection()
  57     : valid(false)
  58 {
  59 }
  60
  61 Connection::~Connection()
  62 {
  63     if (valid)
  64         close();
  65 }
  66
  67
  68 bool
  69 Connection::connect(const string &xhost, const string &xuser,
  70                     const string &xpasswd, const string &xdatabase)
  71 {
  72     if (connected())
  73         return error.set("Already Connected");
  74
  75     _host = xhost;
  76     _user = xuser;
  77     _passwd = xpasswd;
  78     _database = xdatabase;
  79
  80     error.clear();
  81
  82     mysql_init(&mysql);
  83     mysql_options(&mysql, MYSQL_OPT_COMPRESS, 0); // might want to be 1
  84     mysql_options(&mysql, MYSQL_READ_DEFAULT_GROUP, "odbc");
  85     if (!mysql_real_connect(&mysql, charstar(_host), charstar(_user),
  86                             charstar(_passwd), charstar(_database),
  87                             0, NULL, 0))
  88         return error.set(mysql_error(&mysql));
  89
  90     valid = true;
  91     return false;
  92 }
  93
  94 void
  95 Connection::close()
  96 {
  97     mysql_close(&mysql);
  98 }
  99
 100 bool
 101 Connection::query(const string &sql)
 102 {
 103     DPRINTF(SQL, "Sending SQL query to server:\n%s", sql);
 104     error.clear();
 105     if (mysql_real_query(&mysql, sql.c_str(), sql.size()))
 106         error.set(mysql_error(&mysql));
 107
 108     return error;
 109 }
 110
 111
 112 /* namespace MySQL */ }