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lxdream.org :: lxdream/src/config.c
lxdream 0.9.1
released Jun 29
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filename src/config.c
changeset 450:207461e79f21
next458:cbb2dd12daeb
author nkeynes
date Wed Oct 17 11:26:45 2007 +0000 (12 years ago)
permissions -rw-r--r--
last change Split config management out to config.[ch]
Manage config filename
Check home dir + sysconfdir for conf file
Initial work on a path settings dialog
file annotate diff log raw
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/**
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 * $Id: config.c,v 1.1 2007-10-17 11:26:45 nkeynes Exp $
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 *
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 * User configuration support
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program 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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 * This program 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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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib/gstrfuncs.h>
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#include "dream.h"
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#include "config.h"
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#include "maple/maple.h"
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gboolean lxdream_load_config_file( const gchar *filename );
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gboolean lxdream_save_config_file( const gchar *filename );
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gboolean lxdream_load_config_stream( FILE *f );
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gboolean lxdream_save_config_stream( FILE *f );
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static struct lxdream_config_entry global_config[] =
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    {{ "bios", CONFIG_TYPE_FILE, "dcboot.rom" },
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     { "flash", CONFIG_TYPE_FILE, "dcflash.rom" },
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     { "default path", CONFIG_TYPE_PATH, "." },
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     { "save path", CONFIG_TYPE_PATH, "save" },
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     { "bootstrap", CONFIG_TYPE_FILE, "IP.BIN" },
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     { NULL, CONFIG_TYPE_NONE }};
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static struct lxdream_config_entry serial_config[] =
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    {{ "device", CONFIG_TYPE_FILE, "/dev/ttyS1" },
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     { NULL, CONFIG_TYPE_NONE }};
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struct lxdream_config_group lxdream_config_root[] = 
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    {{ "global", global_config },
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     { "controllers", NULL },
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     { "serial", serial_config },
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     { NULL, CONFIG_TYPE_NONE }};
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static gchar *lxdream_config_load_filename = NULL;
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static gchar *lxdream_config_save_filename = NULL;
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gboolean lxdream_find_config()
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{
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    char *home = getenv("HOME");
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    if( lxdream_config_save_filename == NULL ) {
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	lxdream_config_save_filename = g_strdup_printf("%s/.%s", home, DEFAULT_CONFIG_FILENAME);
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    }
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    if( lxdream_config_load_filename == NULL ) {
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	if( access(lxdream_config_save_filename, R_OK) == 0 ) {
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	    lxdream_config_load_filename = g_strdup(lxdream_config_save_filename);
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	} else if( access( PACKAGE_CONF_DIR "/" DEFAULT_CONFIG_FILENAME, R_OK ) == 0 ) {
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	    lxdream_config_load_filename = g_strdup(PACKAGE_CONF_DIR "/" DEFAULT_CONFIG_FILENAME);
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	} else if( access( "./" DEFAULT_CONFIG_FILENAME, R_OK ) == 0 ) {
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	    lxdream_config_load_filename = g_strdup("./" DEFAULT_CONFIG_FILENAME);
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	} else {
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	    lxdream_config_load_filename = g_strdup(lxdream_config_save_filename);
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	}	
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    } 
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}
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void lxdream_set_config_filename( const gchar *filename )
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{
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    if( lxdream_config_load_filename != NULL ) {
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	g_free(lxdream_config_load_filename);
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    }
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    lxdream_config_load_filename = g_strdup(filename);
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    if( lxdream_config_save_filename != NULL ) {
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	g_free(lxdream_config_save_filename);
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    }
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    lxdream_config_save_filename = g_strdup(filename);
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}
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void lxdream_set_default_config( )
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{
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    struct lxdream_config_group *group = lxdream_config_root;
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    while( group->key != NULL ) {
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	struct lxdream_config_entry *param = group->params;
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	if( param != NULL ) {
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	    while( param->key != NULL ) {
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		if( param->value != param->default_value ) {
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		    if( param->value != NULL )
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			free( param->value );
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		    param->value = (gchar *)param->default_value;
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		}
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		param++;
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	    }
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	}
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	group++;
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    }
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    maple_detach_all();
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}
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const gchar *lxdream_get_config_value( int key )
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{
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    return global_config[key].value;
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}
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void lxdream_set_config_value( int key, const gchar *value )
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{
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    struct lxdream_config_entry *param = &global_config[key];
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    if( param->value != param->default_value && param->value != NULL ) {
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	free( param->value );
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    }
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    param->value = g_strdup(value);
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}
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gboolean lxdream_load_config( )
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{
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    if( lxdream_config_load_filename == NULL ) {
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	lxdream_find_config();
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    }
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    return lxdream_load_config_file(lxdream_config_load_filename);
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}
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gboolean lxdream_save_config( )
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{
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    if( lxdream_config_save_filename == NULL ) {
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	lxdream_find_config();
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    }
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    return lxdream_save_config_file(lxdream_config_save_filename);
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}
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gboolean lxdream_load_config_file( const gchar *filename )
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{
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    FILE *f;
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    gboolean result;
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    if( access(filename, F_OK) != 0 ) {
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	INFO( "Configuration file '%s' does not exist, creating from defaults" );
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	lxdream_set_default_config();
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	lxdream_save_config();
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    }
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    f = fopen(filename, "ro");
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    if( f == NULL ) {
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	ERROR( "Unable to open configuration file '%s': %s", filename, strerror(errno) );
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	lxdream_set_default_config();
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	return FALSE;
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    }
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    result = lxdream_load_config_stream( f );
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    fclose(f);
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    return result;
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}
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gboolean lxdream_load_config_stream( FILE *f )
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{
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    char buf[512];
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    int maple_device = -1, maple_subdevice = -1;
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    struct lxdream_config_group devgroup;
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    struct lxdream_config_group *group = NULL;
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    maple_device_t device = NULL;
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    lxdream_set_default_config();
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    while( fgets( buf, sizeof(buf), f ) != NULL ) {
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	g_strstrip(buf);
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	if( buf[0] == '#' )
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	    continue;
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	if( *buf == '[' ) {
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	    char *p = strchr(buf, ']');
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	    if( p != NULL ) {
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		struct lxdream_config_group *tmp_group;
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		maple_device = maple_subdevice = -1;
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		*p = '\0';
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		g_strstrip(buf+1);
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		tmp_group = &lxdream_config_root[0];
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		while( tmp_group->key != NULL ) {
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		    if( strcasecmp(tmp_group->key, buf+1) == 0 ) {
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			group = tmp_group;
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			break;
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		    }
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		    tmp_group++;
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		}
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	    }
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	} else if( group != NULL ) {
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	    char *value = strchr( buf, '=' );
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	    if( value != NULL ) {
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		struct lxdream_config_entry *param = group->params;
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		*value = '\0';
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		value++;
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		g_strstrip(buf);
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		g_strstrip(value);
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		if( strcmp(group->key,"controllers") == 0  ) {
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		    if( g_strncasecmp( buf, "device ", 7 ) == 0 ) {
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			maple_device = strtoul( buf+7, NULL, 0 );
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			if( maple_device < 0 || maple_device > 3 ) {
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			    ERROR( "Device number must be between 0..3 (not '%s')", buf+7);
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			    continue;
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			}
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			maple_subdevice = 0;
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			device = maple_new_device( value );
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			if( device == NULL ) {
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			    ERROR( "Unrecognized device '%s'", value );
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			} else {
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			    devgroup.key = "controllers";
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			    devgroup.params = maple_get_device_config(device);
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			    maple_attach_device( device, maple_device, maple_subdevice );
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			    group = &devgroup;
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			}
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			continue;
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		    } else if( g_strncasecmp( buf, "subdevice ", 10 ) == 0 ) {
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			maple_subdevice = strtoul( buf+10, NULL, 0 );
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			if( maple_device == -1 ) {
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			    ERROR( "Subdevice not allowed without primary device" );
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			} else if( maple_subdevice < 1 || maple_subdevice > 5 ) {
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			    ERROR( "Subdevice must be between 1..5 (not '%s')", buf+10 );
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			} else if( (device = maple_new_device(value)) == NULL ) {
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			    ERROR( "Unrecognized subdevice '%s'", value );
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			} else {
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			    devgroup.key = "controllers";
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			    devgroup.params = maple_get_device_config(device);
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			    maple_attach_device( device, maple_device, maple_subdevice );
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			    group = &devgroup;
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			}
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			continue;
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		    }
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		}
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		while( param->key != NULL ) {
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		    if( strcasecmp( param->key, buf ) == 0 ) {
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			param->value = g_strdup(value);
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			break;
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		    }
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		    param++;
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		}
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	    }
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	}
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    }
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    return TRUE;
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}
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gboolean lxdream_save_config_file( const gchar *filename )
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{
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    FILE *f = fopen(filename, "wo");
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    gboolean result;
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    if( f == NULL ) {
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	ERROR( "Unable to open '%s': %s", filename, strerror(errno) );
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	return FALSE;
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    }
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    result = lxdream_save_config_stream(f);
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    fclose(f);
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    return TRUE;
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}    
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gboolean lxdream_save_config_stream( FILE *f )
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{
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    struct lxdream_config_group *group = &lxdream_config_root[0];
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    while( group->key != NULL ) {
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	struct lxdream_config_entry *entry = group->params;
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	fprintf( f, "[%s]\n", group->key );
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	if( entry != NULL ) {
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	    while( entry->key != NULL ) {
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		fprintf( f, "%s = %s\n", entry->key, entry->value );
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		entry++;
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	    }
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	} else if( strcmp(group->key, "controllers") == 0 ) {
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	    int i,j;
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	    for( i=0; i<4; i++ ) {
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		for( j=0; j<6; j++ ) {
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		    maple_device_t dev = maple_get_device( i, j );
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		    if( dev != NULL ) {
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			if( j == 0 )
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			    fprintf( f, "Device %d = %s\n", i, dev->device_class->name );
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			else 
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			    fprintf( f, "Subdevice %d = %s\n", j, dev->device_class->name );
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			entry = dev->get_config(dev);
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			while( entry->key != NULL ) {
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			    fprintf( f, "%*c%s = %s\n", j==0?4:8, ' ',entry->key, entry->value );
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			    entry++;
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			}
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		    }
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		}
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	    }
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	}
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	fprintf( f, "\n" );
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	group++;
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    }
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    return TRUE;
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}
.