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125 lines
3.4 KiB
125 lines
3.4 KiB
/*
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* Copyright (C) 2001-2003 FhG Fokus
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* Copyright (C) 2007-2008 1&1 Internet AG
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* \file lib/srdb1/db_row.c
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* \brief Type that represents a row in a database.
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*
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* This file holds a type that represents a row in a database, some convenience
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* macros and a function for memory managements.
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* \ingroup db1
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*/
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#include "db_row.h"
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#include <string.h>
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#include "../../dprint.h"
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#include "../../mem/mem.h"
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/*
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* Release memory used by row
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*/
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int db_free_row(db_row_t* _r)
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{
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int col;
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db_val_t* _val;
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if (!_r) {
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LM_ERR("invalid parameter value\n");
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return -1;
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}
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/*
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* Loop thru each columm, then check to determine if the storage pointed to
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* by db_val_t structure must be freed. This is required for all data types
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* which use a pointer to a buffer like DB1_STRING, DB1_STR and DB1_BLOB and
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* the database module copied them during the assignment.
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* If this is not done, a memory leak will happen.
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* Don't try to free the static dummy string (as indicated from the NULL value),
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* as this is not valid.
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*/
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for (col = 0; col < ROW_N(_r); col++) {
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_val = &(ROW_VALUES(_r)[col]);
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switch (VAL_TYPE(_val)) {
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case DB1_STRING:
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if ( (!VAL_NULL(_val)) && VAL_FREE(_val)) {
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LM_DBG("free VAL_STRING[%d] '%s' at %p\n", col,
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(char *)VAL_STRING(_val),
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(char *)VAL_STRING(_val));
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pkg_free((char *)VAL_STRING(_val));
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VAL_STRING(_val) = NULL;
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}
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break;
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case DB1_STR:
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if ( (!VAL_NULL(_val)) && VAL_FREE(_val)) {
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LM_DBG("free VAL_STR[%d] '%.*s' at %p\n", col,
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VAL_STR(_val).len,
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VAL_STR(_val).s, VAL_STR(_val).s);
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pkg_free(VAL_STR(_val).s);
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VAL_STR(_val).s = NULL;
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}
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break;
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case DB1_BLOB:
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if ( (!VAL_NULL(_val)) && VAL_FREE(_val)) {
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LM_DBG("free VAL_BLOB[%d] at %p\n", col, VAL_BLOB(_val).s);
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pkg_free(VAL_BLOB(_val).s);
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VAL_BLOB(_val).s = NULL;
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}
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break;
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default:
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break;
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}
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}
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/* now as we freed all, set number of colums to zero again */
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ROW_N(_r) = 0;
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if (ROW_VALUES(_r)) {
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LM_DBG("freeing row values at %p\n", ROW_VALUES(_r));
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pkg_free(ROW_VALUES(_r));
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ROW_VALUES(_r) = NULL;
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}
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return 0;
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}
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/**
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* Allocate memory for row value.
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* \param _res result set
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* \param _row filled row
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* \return zero on success, negative on errors
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*/
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int db_allocate_row(const db1_res_t* _res, db_row_t* _row)
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{
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int len = sizeof(db_val_t) * RES_COL_N(_res);
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ROW_VALUES(_row) = (db_val_t*)pkg_malloc(len);
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if (!ROW_VALUES(_row)) {
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LM_ERR("no private memory left\n");
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return -1;
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}
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LM_DBG("allocate %d bytes for row values at %p\n", len, ROW_VALUES(_row));
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memset(ROW_VALUES(_row), 0, len);
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/* Save the number of columns in the ROW structure */
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ROW_N(_row) = RES_COL_N(_res);
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return 0;
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}
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