Class: Oedipus::Mysql

Inherits:
Object
  • Object
show all
Defined in:
ext/oedipus/oedipus.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, port) ⇒ Object 



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# File 'ext/oedipus/oedipus.c', line 33

static VALUE odp_initialize(VALUE self, VALUE host, VALUE port) {
  Check_Type(host, T_STRING);
  Check_Type(port, T_FIXNUM);

  rb_iv_set(self, "@host", host);
  rb_iv_set(self, "@port", port);

  odp_open(self);

  return self;
}

Class Method Details

.new(host, port) ⇒ Object

– Public methods –



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# File 'ext/oedipus/oedipus.c', line 15

static VALUE odp_new(VALUE klass, VALUE host, VALUE port) {
  OdpMysql * conn;
  VALUE      self;
  VALUE      args[2];

  conn = malloc(sizeof(OdpMysql));
  conn->connected = 0;

  self = Data_Wrap_Struct(klass, 0, odp_free, conn);

  args[0] = host;
  args[1] = port;

  rb_obj_call_init(self, 2, args);

  return self;
}

Instance Method Details

#close ⇒ Object 



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# File 'ext/oedipus/oedipus.c', line 74

static VALUE odp_close(VALUE self) {
  OdpMysql * conn;

  Data_Get_Struct(self, OdpMysql, conn);

  if (!conn->connected) {
    return Qfalse;
  }

  mysql_close(conn->ptr);
  conn->connected = 0;

  return Qtrue;
}

#execute(*, self) ⇒ Object 



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# File 'ext/oedipus/oedipus.c', line 89

static VALUE odp_execute(int argc, VALUE * args, VALUE self) {
  VALUE       sql;
  OdpMysql  * conn;

  if (0 == argc) {
    rb_raise(rb_eArgError, "Wrong number of arguments (0 for 1..*)");
  }

  Check_Type(args[0], T_STRING);

  Data_Get_Struct(self, OdpMysql, conn);

  if (!conn->connected) {
    odp_raise(self, "Cannot execute query on a closed connection");
  }

  sql = odp_replace_bind_values(conn, args[0], &args[1], argc - 1);

  if (mysql_query(conn->ptr, RSTRING_PTR(sql))) {
    odp_raise(self, "Failed to execute statement(s)");
  }

  return INT2NUM(mysql_affected_rows(conn->ptr));
}

#open ⇒ Object 



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# File 'ext/oedipus/oedipus.c', line 45

static VALUE odp_open(VALUE self) {
  OdpMysql * conn;

  Data_Get_Struct(self, OdpMysql, conn);

  if (conn->connected) {
    return Qfalse;
  }

  if ((conn->ptr = mysql_init(NULL)) == NULL) {
    odp_raise(self, "Unable to initialize mysql");
  }

  if (mysql_real_connect(conn->ptr,
                         RSTRING_PTR(rb_iv_get(self, "@host")),
                         "",
                         "",
                         NULL,
                         NUM2UINT(rb_iv_get(self, "@port")),
                         NULL,
                         CLIENT_MULTI_STATEMENTS) == NULL) {
    odp_raise(self, "Unable to connect to mysql");
  }

  conn->connected = 1;

  return Qtrue;
}

#query(*, self) ⇒ Object 



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# File 'ext/oedipus/oedipus.c', line 114

static VALUE odp_query(int argc, VALUE * args, VALUE self) {
  VALUE           sql;
  OdpMysql      * conn;
  MYSQL_RES     * rs;
  int             status;
  int             num_fields;
  MYSQL_ROW       row;
  MYSQL_FIELD   * fields;
  unsigned long * lengths;
  int             i;
  VALUE           rows;
  VALUE           hash;
  VALUE           results;

  if (0 == argc) {
    rb_raise(rb_eArgError, "Wrong number of arguments (0 for 1..*)");
  }

  Check_Type(args[0], T_STRING);

  Data_Get_Struct(self, OdpMysql, conn);

  if (!conn->connected) {
    odp_raise(self, "Cannot execute query on a closed connection");
  }

  sql = odp_replace_bind_values(conn, args[0], &args[1], argc - 1);

  if (mysql_query(conn->ptr, RSTRING_PTR(sql))) {
    odp_raise(self, "Failed to execute statement(s)");
  }

  results = rb_ary_new();

  do {
    if ((rs = mysql_store_result(conn->ptr)) != NULL) {
      rb_ary_push(results, (rows = rb_ary_new()));

      num_fields = mysql_num_fields(rs);
      fields = mysql_fetch_fields(rs);

      while ((row = mysql_fetch_row(rs))) {
        lengths = mysql_fetch_lengths(rs);
        rb_ary_push(rows, (hash = rb_hash_new()));
        for (i = 0; i < num_fields; ++i) {
          rb_hash_aset(hash,
                       rb_str_new2(fields[i].name),
                       odp_cast_value(fields[i], row[i], lengths[i]));
        }
      }

      mysql_free_result(rs);
    }

    if ((status = mysql_next_result(conn->ptr)) > 0) {
      odp_raise(self, "Query execution failed");
    }
  } while (status == 0);

  return results;
}