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db_conn.c

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/* GtkSQL -- an interactive graphical query tool for PostgreSQL and MySQL. 
 * Copyright (C) 1998-2003  Lionel ULMER, Darryl Luff
 * MySQL "driver" (C) 1998 Des Herriott (des@ops.netcom.net.uk)
 *
 * This program 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.
 *
 * This program 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 "../config.h"

#include <stdlib.h>
#include <string.h>

#include "db_conn.h"

void add_keyword(DBConnection * conn, char *key, int type)
{
    Keyword *cur, *prev = NULL, *now = conn->keylist;

    cur = (Keyword *) malloc(sizeof(Keyword));
    cur->key = strdup(key);
    cur->type = type;

    while (now != NULL) {
        int cmp = strcasecmp(cur->key, now->key);

        if (cmp < 0) {
            cur->next = now;
            if (prev != NULL)
                prev->next = cur;
            else
                conn->keylist = cur;
            break;
        }
        else if (cmp == 0) {
            if (cur->type < now->type) {
                cur->next = now;
                if (prev != NULL)
                    prev->next = cur;
                else
                    conn->keylist = cur;
                break;
            }
            else if (cur->type == now->type) {
                break;
            }
        }
        prev = now;
        now = now->next;
    }
    if (now == NULL) {
        cur->next = NULL;
        if (prev != NULL)
            prev->next = cur;
        else
            conn->keylist = cur;
    }
}

DBConnector *dbconnector_find(char *key) {
    int i = 1;
    DBConnector *dbc;
    dbc = connectorTable[i];
    while (dbc != NULL) {
        if (strcasecmp(dbc->dbtype, key) == 0)
            return dbc;

        i++;
        dbc = connectorTable[i];
    }
    return NULL;
}

void keywords_remove_all(DBConnection * conn)
{
    Keyword *next, *cur = conn->keylist;

    while (cur != NULL) {
        next = cur->next;

        free(cur->key);
        free(cur);

        cur = next;
    }
}

void keywords_remove(DBConnection * conn, int type)
{
    Keyword *prev = NULL, *cur = conn->keylist, *next;

    while (cur != NULL) {
        next = cur->next;

        if (cur->type == type) {
            if (prev == NULL)
                conn->keylist = cur->next;
            else
                prev->next = cur->next;
            free(cur->key);
            free(cur);
        }
        else {
            prev = cur;
        }
        cur = next;
    }
}

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