/*

 *

 *  config.c

 *

 *       Copyright (C) Stan Seibert - July 2000

 *       Copyright (C) Monty - Mar 2010

 *

 *  This file is part of libao, a cross-platform audio output library.  See

 *  README for a history of this source code.

 *

 *  libao 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, or (at your option)

 *  any later version.

 *

 *  libao 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 GNU Make; see the file COPYING.  If not, write to

 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 ********************************************************************

 last mod: $Id: config.c 17763 2010-12-17 11:28:29Z xiphmont $

 ********************************************************************/

#include "ao.h"

#include "ao_private.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <limits.h>

#include <ctype.h>

#define LINE_LEN 100

static char *trim(char *p){

  char *t;

  while(*p && isspace(*p))p++;

  if(*p){

    t=p+strlen(p);

    while(t>p && isspace(*(t-1))){

      t--;

      *t='\0';

    }

  }

  return p;

}

static int ao_read_config_file(ao_config *config, const char *config_file)

{

	FILE *fp;

	char line[LINE_LEN];

	int end;

	if ( !(fp = fopen(config_file, "r")) )

		return 0; /* Can't open file */

	while (fgets(line, LINE_LEN, fp)) {

		/* All options are key=value */

		if (strncmp(line, "default_driver=", 15) == 0) {

			free(config->default_driver);

			end = strlen(line);

			if (line[end-1] == '\n')

				line[end-1] = 0; /* Remove trailing newline */

			config->default_driver = strdup(line+15);

		}else{

                        /* entries in the config file that don't parse as

                           directives to AO at large are treated as driver

                           options */

                        char *key=trim(line);

                        if(key && *key){

                          char *val=strchr(key,'=');

                          if(val){

                            *val='\0';

                            val++;

                          }

                          ao_append_global_option(key,val);

                        }

                }

	}

	fclose(fp);

	return 1;

}

void ao_read_config_files (ao_config *config)

{

	char userfile[FILENAME_MAX+1];

	char *homedir = getenv("HOME");

	/* Read the system-wide config file */

	ao_read_config_file(config, AO_SYSTEM_CONFIG);

	/* Read the user config file */

	if ( homedir!=NULL &&

	     strlen(homedir) <= FILENAME_MAX - strlen(AO_USER_CONFIG) )

	{

		strncpy(userfile, homedir, FILENAME_MAX);

		strcat(userfile, AO_USER_CONFIG);

		ao_read_config_file(config, userfile);

	}

}