db_val.c

/*
 * $Id$ 
 *
 * Copyright (C) 2001-2003 FhG Fokus
 * Copyright (C) 2008-2009 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
 */

#include "db_ut.h"

#include <stdio.h>
#include <time.h>

int db_str2val(const db_type_t _t, db_val_t* _v, const char* _s, const int _l,
                const unsigned int _cpy)
{
        static str dummy_string = {"", 0};
        
        if (!_v) {
                LM_ERR("invalid parameter value\n");
                return -1;
        }
        /* A NULL string is a SQL NULL value, otherwise its an empty value */
        if (!_s) {
                LM_DBG("converting NULL value");
                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 DB1_INT:
                LM_DBG("converting INT [%s]\n", _s);
                if (db_str2int(_s, &VAL_INT(_v)) < 0) {
                        LM_ERR("error while converting integer value from string\n");
                        return -2;
                } else {
                        VAL_TYPE(_v) = DB1_INT;
                        return 0;
                }
                break;

        case DB1_BIGINT:
                LM_DBG("converting BIGINT [%s]\n", _s);
                if (db_str2longlong(_s, &VAL_BIGINT(_v)) < 0) {
                        LM_ERR("error while converting big integer value from string\n");
                        return -3;
                } else {
                        VAL_TYPE(_v) = DB1_BIGINT;
                        return 0;
                }
                break;

        case DB1_BITMAP:
                LM_DBG("converting BITMAP [%s]\n", _s);
                if (db_str2int(_s, &VAL_INT(_v)) < 0) {
                        LM_ERR("error while converting bitmap value from string\n");
                        return -4;
                } else {
                        VAL_TYPE(_v) = DB1_BITMAP;
                        return 0;
                }
                break;
        
        case DB1_DOUBLE:
                LM_DBG("converting DOUBLE [%s]\n", _s);
                if (db_str2double(_s, &VAL_DOUBLE(_v)) < 0) {
                        LM_ERR("error while converting double value from string\n");
                        return -5;
                } else {
                        VAL_TYPE(_v) = DB1_DOUBLE;
                        return 0;
                }
                break;

        case DB1_STRING:
                LM_DBG("converting STRING [%s]\n", _s);

                if (_cpy == 0) {
                        VAL_STRING(_v) = _s;
                } else {
                        VAL_STRING(_v) = pkg_malloc(_l + 1);
                        if (VAL_STRING(_v) == NULL) {
                                LM_ERR("no private memory left\n");
                                return -6;
                        }
                        LM_DBG("allocate %d bytes memory for STRING at %p", _l + 1, VAL_STRING(_v));
                        strncpy((char*)VAL_STRING(_v), _s, _l);
                        ((char*)VAL_STRING(_v))[_l] = '\0';
                        VAL_FREE(_v) = 1;
                }

                VAL_TYPE(_v) = DB1_STRING;
                return 0;

        case DB1_STR:
                LM_DBG("converting STR [%.*s]\n", _l, _s);

                if (_cpy == 0) {
                        VAL_STR(_v).s = (char*) _s;
                } else {
                        VAL_STR(_v).s = pkg_malloc(_l);
                        if (VAL_STR(_v).s == NULL) {
                                LM_ERR("no private memory left\n");
                                return -7;
                        }
                        LM_DBG("allocate %d bytes memory for STR at %p", _l, VAL_STR(_v).s);
                        strncpy(VAL_STR(_v).s, _s, _l);
                        VAL_FREE(_v) = 1;
                }

                VAL_STR(_v).len = _l;
                VAL_TYPE(_v) = DB1_STR;
                return 0;

        case DB1_DATETIME:
                LM_DBG("converting DATETIME [%s]\n", _s);
                if (db_str2time(_s, &VAL_TIME(_v)) < 0) {
                        LM_ERR("error while converting datetime value from string\n");
                        return -8;
                } else {
                        VAL_TYPE(_v) = DB1_DATETIME;
                        return 0;
                }
                break;

        case DB1_BLOB:
                LM_DBG("converting BLOB [%.*s]\n", _l, _s);

                if (_cpy == 0) {
                        VAL_BLOB(_v).s = (char*) _s;
                } else {
                        VAL_BLOB(_v).s = pkg_malloc(_l);
                        if (VAL_BLOB(_v).s == NULL) {
                                LM_ERR("no private memory left\n");
                                return -9;
                        }
                        LM_DBG("allocate %d bytes memory for BLOB at %p", _l, VAL_BLOB(_v).s);
                        strncpy(VAL_BLOB(_v).s, _s, _l);
                        VAL_FREE(_v) = 1;
                }

                VAL_BLOB(_v).len = _l;
                VAL_TYPE(_v) = DB1_BLOB;
                return 0;
        }
        return -10;
}


int db_val2str(const db1_con_t* _c, const db_val_t* _v, char* _s, int* _len)
{
        if (!_c || !_v || !_s || !_len || !*_len) {
                LM_ERR("invalid parameter value\n");
                return -1;
        }

        if (VAL_NULL(_v)) {
                if (*_len < sizeof("NULL")) {
                        LM_ERR("buffer too small\n");
                        return -1;
                }
                *_len = snprintf(_s, *_len, "NULL");
                return 0;
        }
        
        switch(VAL_TYPE(_v)) {
        case DB1_INT:
                if (db_int2str(VAL_INT(_v), _s, _len) < 0) {
                        LM_ERR("error while converting string to int\n");
                        return -2;
                } else {
                        return 0;
                }
                break;

        case DB1_BIGINT:
                if (db_longlong2str(VAL_BIGINT(_v), _s, _len) < 0) {
                        LM_ERR("error while converting string to big int\n");
                        return -3;
                } else {
                        return 0;
                }
                break;

        case DB1_BITMAP:
                if (db_int2str(VAL_BITMAP(_v), _s, _len) < 0) {
                        LM_ERR("error while converting string to int\n");
                        return -4;
                } else {
                        return 0;
                }
                break;

        case DB1_DOUBLE:
                if (db_double2str(VAL_DOUBLE(_v), _s, _len) < 0) {
                        LM_ERR("error while converting string to double\n");
                        return -5;
                } else {
                        return 0;
                }
                break;

        case DB1_DATETIME:
                if (db_time2str(VAL_TIME(_v), _s, _len) < 0) {
                        LM_ERR("failed to convert string to time_t\n");
                        return -8;
                } else {
                        return 0;
                }
                break;

        default:
                return 1;
        }
}