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130 lines
3.2 KiB
130 lines
3.2 KiB
/*
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* $Id$
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*
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* Copyright (C) 2001-2003 FhG FOKUS
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* Copyright (C) 2006-2007 iptelorg GmbH
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*
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* This file is part of ser, a free SIP server.
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*
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* ser 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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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* ser 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/** \ingroup DB_API
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* @{
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*/
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#include "db_drv.h"
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#include "db_gen.h"
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#include "../../mem/mem.h"
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#include "../../sr_module.h"
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#include "../../ut.h"
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#include <string.h>
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#include <stdlib.h>
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int db_drv_init(db_drv_t* ptr, void* free_func)
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{
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ptr->free = free_func;
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return 0;
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}
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void db_drv_free(db_drv_t* ptr)
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{
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ptr->free = NULL;
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}
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/*
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* Find function with given name in module named <module>
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* RETURNS: -1 on error
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* 0 if a function has been found
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* 1 if no function has been found
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*/
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int db_drv_func(db_drv_func_t* func, str* module, char* func_name)
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{
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static str prefix = STR_STATIC_INIT("db_");
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char* buf = NULL, *name;
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if ((buf = pkg_malloc(prefix.len + module->len + 1)) == NULL) {
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LOG(L_ERR, "db_drv_func: No memory left\n");
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goto error;
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}
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memcpy(buf, prefix.s, prefix.len);
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memcpy(buf + prefix.len, module->s, module->len);
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buf[prefix.len + module->len] = '\0';
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/* First try to find the module with prefix "db_" */
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name = buf;
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if (find_module_by_name(name) == 0) {
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/* Not found, so try without the prefix */
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name = buf + prefix.len;
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if (find_module_by_name(name) == 0) {
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ERR("db_drv_func: database driver for '%.*s' not found\n", STR_FMT(module));
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goto error;
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}
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}
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*func = (db_drv_func_t)find_mod_export(name, func_name, 0, 0);
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if (buf) pkg_free(buf);
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if (*func) return 0;
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else return 1;
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error:
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if (buf) pkg_free(buf);
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return -1;
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}
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/*
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* Call function with name <func_name> in DB driver <module>, give
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* it pointer <db_struct> as the pointer to the corresponding DB structure
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* (type of the structure is function-specific) and <offset> is the offset
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* of the driver/connection within the context (used to make DB_DRV_ATTACH
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* and DB_DRV_DATA macros work)
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*/
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int db_drv_call(str* module, char* func_name, void* db_struct, int offset)
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{
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db_drv_func_t func;
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int ret;
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ret = db_drv_func(&func, module, func_name);
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if (ret < 0) {
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ERR("db: db_drv_call failed\n");
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return -1;
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}
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if (ret == 0) {
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db_payload_idx = offset;
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return func(db_struct);
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} else {
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DBG("db_drv_call: DB driver for %.*s does not export function %s\n",
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module->len, ZSW(module->s), func_name);
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return 1;
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}
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}
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/** @} */
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