db_unixodbc/val.c

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/* 
 * $Id: val.c 5519 2009-01-26 18:08:46Z henningw $ 
 *
 * UNIXODBC module
 *
 * Copyright (C) 2005-2006 Marco Lorrai
 * Copyright (C) 2008 1&1 Internet AG
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 * History:
 * --------
 *  2005-12-01  initial commit (chgen)
 */


#include "../../dprint.h"
#include "../../strcommon.h"
#include "../../db/db_ut.h"
#include "db_unixodbc.h"
#include "val.h"
#include "con.h"

/*
 * Used when converting the query to a result
 */
int db_unixodbc_str2val(const db_type_t _t, db_val_t* _v, const char* _s, const int _l,
      const unsigned int _cpy)
{
   /* db_unixodbc uses the NULL string for NULL SQL values */
   if (_v && _s && !strcmp(_s, "NULL")) {
      LM_DBG("converting NULL value");
      static str dummy_string = {"", 0};
      memset(_v, 0, sizeof(db_val_t));
         /* Initialize the string pointers to a dummy empty
          * string so that we do not crash when the NULL flag
          * is set but the module does not check it properly
          */
      VAL_STRING(_v) = dummy_string.s;
      VAL_STR(_v) = dummy_string;
      VAL_BLOB(_v) = dummy_string;
      VAL_TYPE(_v) = _t;
      VAL_NULL(_v) = 1;
      return 0;
   } else {
      return db_str2val(_t, _v, _s, _l, _cpy);
   }
}

/*
 * Used when converting a result from the query
 */
int db_unixodbc_val2str(const db_con_t* _c, const db_val_t* _v, char* _s, int* _len)
{
   int l, tmp;
   char* old_s;

   /* db_unixodbc uses a custom escape function */
   tmp = db_val2str(_c, _v, _s, _len);
   if (tmp < 1)
      return tmp;

   switch(VAL_TYPE(_v))
   {
      case DB_STRING:
         l = strlen(VAL_STRING(_v));
         if (*_len < (l * 2 + 3))
         {
            LM_ERR("destination buffer too short\n");
            return -6;
         }
         else
         {
            old_s = _s;
            *_s++ = '\'';
            if(use_escape_common)
            {
               _s += escape_common(_s, (char*)VAL_STRING(_v), l);
            } else {
               memcpy(_s, VAL_STRING(_v), l);
               _s += l;
            }
            *_s++ = '\'';
            *_s = '\0'; /* FIXME */
            *_len = _s - old_s;
            return 0;
         }
         break;

      case DB_STR:
         l = VAL_STR(_v).len;
         if (*_len < (l * 2 + 3))
         {
            LM_ERR("destination buffer too short\n");
            return -7;
         }
         else
         {
            old_s = _s;
            *_s++ = '\'';
            if(use_escape_common)
            {
               _s += escape_common(_s, VAL_STR(_v).s, l);
            } else {
               memcpy(_s, VAL_STR(_v).s, l);
               _s += l;
            }
            *_s++ = '\'';
            *_s = '\0'; /* FIXME */
            *_len = _s - old_s;
            return 0;
         }
         break;

      case DB_BLOB:
         l = VAL_BLOB(_v).len;
         if (*_len < (l * 2 + 3))
         {
            LM_ERR("destination buffer too short\n");
            return -9;
         }
         else
         {
            old_s = _s;
            *_s++ = '\'';
            if(use_escape_common)
            {
               _s += escape_common(_s, VAL_BLOB(_v).s, l);
            } else {
               memcpy(_s, VAL_BLOB(_v).s, l);
               _s += l;
            }
            *_s++ = '\'';
            *_s = '\0'; /* FIXME */
            *_len = _s - old_s;
            return 0;
         }
         break;

      default:
         LM_DBG("unknown data type\n");
         return -10;
   }
}