bdb_val.c

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/*
 * $Id: bdb_val.c 4986 2008-09-24 11:02:42Z henningw $
 *
 * db_berkeley module, portions of this code were templated using
 * the dbtext and postgres modules.

 * Copyright (C) 2007 Cisco Systems
 *
 * 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:
 * --------
 * 2007-09-19  genesis (wiquan)
 */
 

#include "../../db/db_val.h"
#include "../../db/db_ut.h"
#include "db_berkeley.h"
#include "bdb_res.h"
#include "bdb_val.h"
#include <string.h>

/**
 * A copy of db_ut::db_time2str EXCEPT does not wrap the date in single-quotes
 *
 * Convert a time_t value to string (w.o single-quote)
 * \param _v source value
 * \param _s target string
 * \param _l available length and target length
 * \return -1 on error, 0 on success
 * \todo This functions add quotes to the time value. This
 * should be done in the val2str function, as some databases
 * like db_berkeley don't need or like this at all.
 */
inline int bdb_time2str(time_t _v, char* _s, int* _l)
{
   struct tm* t;
   int l;

   if ((!_s) || (!_l) || (*_l < 2)) {
      LM_ERR("Invalid parameter value\n");
      return -1;
   }

// *_s++ = '\'';

   /* Convert time_t structure to format accepted by the database */
   t = localtime(&_v);
   l = strftime(_s, *_l -1, "%Y-%m-%d %H:%M:%S", t);

   if (l == 0) {
      LM_ERR("Error during time conversion\n");
      /* the value of _s is now unspecified */
      _s = NULL;
      _l = 0;
      return -1;
   }
   *_l = l;

// *(_s + l) = '\'';
// *_l = l + 2;
   return 0;
}

/**
 * Does not copy strings
 */
int bdb_str2val(db_type_t _t, db_val_t* _v, char* _s, int _l)
{

   static str dummy_string = {"", 0};

   if(!_s)
   {
      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;
   }
   VAL_NULL(_v) = 0;

   switch(_t) {
   case DB_INT:
      if (db_str2int(_s, &VAL_INT(_v)) < 0) {
         LM_ERR("Error while converting INT value from string\n");
         return -2;
      } else {
         VAL_TYPE(_v) = DB_INT;
         return 0;
      }
      break;

   case DB_BIGINT:
         LM_ERR("BIGINT not supported");
         return -1;

   case DB_BITMAP:
      if (db_str2int(_s, &VAL_INT(_v)) < 0) {
         LM_ERR("Error while converting BITMAP value from string\n");
         return -3;
      } else {
         VAL_TYPE(_v) = DB_BITMAP;
         return 0;
      }
      break;

   case DB_DOUBLE:
      if (db_str2double(_s, &VAL_DOUBLE(_v)) < 0) {
         LM_ERR("Error while converting DOUBLE value from string\n");
         return -4;
      } else {
         VAL_TYPE(_v) = DB_DOUBLE;
         return 0;
      }
      break;

   case DB_STRING:
      VAL_STRING(_v) = _s;
      VAL_TYPE(_v) = DB_STRING;
      VAL_FREE(_v) = 1;
      
      if( strlen(_s)==4 && !strncasecmp(_s, "NULL", 4) )
         VAL_NULL(_v) = 1;
      
      return 0;

   case DB_STR:
      VAL_STR(_v).s = (char*)_s;
      VAL_STR(_v).len = _l;
      VAL_TYPE(_v) = DB_STR;
      VAL_FREE(_v) = 1;

      if( strlen(_s)==4 && !strncasecmp(_s, "NULL", 4) )
         VAL_NULL(_v) = 1;

      return 0;

   case DB_DATETIME:
      if (db_str2time(_s, &VAL_TIME(_v)) < 0) {
         LM_ERR("Error converting datetime\n");
         return -5;
      } else {
         VAL_TYPE(_v) = DB_DATETIME;
         return 0;
      }
      break;

   case DB_BLOB:
      VAL_BLOB(_v).s = _s;
      VAL_TYPE(_v) = DB_BLOB;
      LM_DBG("got blob len %d\n", _l);
      return 0;
   }

   return -6;
}


/*
 * Used when converting result from a query
 */
int bdb_val2str(db_val_t* _v, char* _s, int* _len)
{
   int l;

   if (VAL_NULL(_v)) 
   {
      *_len = snprintf(_s, *_len, "NULL");
      return 0;
   }
   
   switch(VAL_TYPE(_v)) {
   case DB_INT:
      if (db_int2str(VAL_INT(_v), _s, _len) < 0) {
         LM_ERR("Error while converting int to string\n");
         return -2;
      } else {
         LM_DBG("Converted int to string\n");
         return 0;
      }
      break;

   case DB_BITMAP:
      if (db_int2str(VAL_INT(_v), _s, _len) < 0) {
         LM_ERR("Error while converting bitmap to string\n");
         return -3;
      } else {
         LM_DBG("Converted bitmap to string\n");
         return 0;
      }
      break;

   case DB_DOUBLE:
      if (db_double2str(VAL_DOUBLE(_v), _s, _len) < 0) {
         LM_ERR("Error while converting double  to string\n");
         return -3;
      } else {
         LM_DBG("Converted double to string\n");
         return 0;
      }
      break;

   case DB_STRING:
      l = strlen(VAL_STRING(_v));
      if (*_len < l ) 
      {  LM_ERR("Destination buffer too short for string\n");
         return -4;
      } 
      else 
      {  LM_DBG("Converted string to string\n");
         strncpy(_s, VAL_STRING(_v) , l);
         _s[l] = 0;
         *_len = l;
         return 0;
      }
      break;

   case DB_STR:
      l = VAL_STR(_v).len;
      if (*_len < l) 
      {
         LM_ERR("Destination buffer too short for str\n");
         return -5;
      } 
      else 
      {
         LM_DBG("Converted str to string\n");
         strncpy(_s, VAL_STR(_v).s , VAL_STR(_v).len);
         *_len = VAL_STR(_v).len;
         return 0;
      }
      break;

   case DB_DATETIME:
      if (bdb_time2str(VAL_TIME(_v), _s, _len) < 0) {
         LM_ERR("Error while converting time_t to string\n");
         return -6;
      } else {
         LM_DBG("Converted time_t to string\n");
         return 0;
      }
      break;

   case DB_BLOB:
      l = VAL_BLOB(_v).len;
      if (*_len < l) 
      {
         LM_ERR("Destination buffer too short for blob\n");
         return -7;
      } 
      else 
      {
         LM_DBG("Converting BLOB [%s]\n", _s);
         _s = VAL_BLOB(_v).s;
         *_len = 0;
         return -8;
      }
      break;

   default:
      LM_DBG("Unknown data type\n");
      return -8;
   }
}