libconfig.c

VoiFax is a program that manage voice/data/fax modem in the same manner of vgetty and mgetty.VoiFax

/*  voifax general configuration interface library
 *  Copyright (C) 2004  Simone Freddio & Andrea Emanuelli
 *
 *  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 <stdio.h>
#include <string.h>
#include "libconfig.h"
#include "common.h"

/* Variabili Locali */
char libconfig_currentfile[256];

/* prototipi locali */
int libconfig_addhash(char *section, char *key, char *val);

int libconfig_addhash(char *secname, char *key, char *val)
{
	char module[] = "libconfig_addhash";
	int secnum = 0, itemnum = 0;

	/* recupera la prima sezione libera oppure il numero di sezione se gia' esistente*/
	while (strcmp(sections[secnum].section_name, secname) != 0 &&
		   sections[secnum].used == 1 &&
		   secnum < MAXSECTIONS) secnum++;

	if (secnum == MAXSECTIONS)
	{
		TRC(TRC_ERR, module, "maximum sections reached!!!");
		return false;
	}

	if (sections[secnum].used == 0)
	{
		sections[secnum].used = 1;
		strcpy(sections[secnum].section_name, secname);
	}

	while (strcmp(sections[secnum].items[itemnum].key, key) !=0 &&
			sections[secnum].items[itemnum].used == 1 &&
			itemnum < MAXHASHNUMBER) itemnum++;

	if (sections[secnum].items[itemnum].used == 1)
	{
		TRC(TRC_WARN, module, "key duplicated!!! ignoring line...");
		return false;
	}

	sections[secnum].items[itemnum].used = 1;
	strcpy(sections[secnum].items[itemnum].key, key);
	strcpy(sections[secnum].items[itemnum].val, val);

	return true;
}

void libconfig_freehash(void)
{
	memset(libconfig_currentfile, 0, sizeof(libconfig_currentfile));
	memset(sections, 0, sizeof(sections));
}

int libconfig_init(char *filename)
{
	char module[] = "libconfig_init";
	FILE *conffd;
	char buffer[MAXHASHSIZE * 3];
	int argc;
	char args[3][MAXHASHSIZE];
	
	if (strcmp(filename, libconfig_currentfile) != 0)
	{

		libconfig_freehash();

		conffd = fopen(filename, "r");
		if (conffd == NULL) 
		{
			TRC(TRC_ERR, module, "Impossibile trovare il file di configurazione");
			return false;
		}

		while (!feof(conffd))
		{
			fgets(buffer, MAXHASHSIZE*3, conffd);
			if (buffer[0]!='#' && strlen(buffer)>3)
			{
				argc = sscanf(buffer, "%s %s %s", args[0], args[1], args[2]);
				if (argc==3)
					libconfig_addhash(args[0], args[1], args[2]);
				else 
					TRC(TRC_WARN, module, "Attention! a row has bad format!! Ignoring line...");
			}
		}

		fclose(conffd);

		strcpy(libconfig_currentfile, filename);
	}

	return true;
}

char *libconfig_getvalue(char *secname, char *key, char *defval)
{
	int secnum = 0, itemnum = 0;

	while (sections[secnum].used == 1 &&
		   strcmp(sections[secnum].section_name, secname) != 0 &&
		   secnum < MAXSECTIONS) secnum++;

	if (secnum == MAXSECTIONS)
		return defval;

	if (sections[secnum].used == 0)
		return defval;

	while (sections[secnum].items[itemnum].used == 1 &&
		   strcmp(sections[secnum].items[itemnum].key, key) != 0 &&
		   itemnum < MAXHASHNUMBER) itemnum++;

	if (itemnum == MAXHASHNUMBER)
		return defval;

	if (sections[secnum].items[itemnum].used == 0)
		return defval;

	return &sections[secnum].items[itemnum].val[0];
}