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/* -*-c-*- -------------- mix_config.c :
* Implementation of the functions declared in mix_config.h
* ------------------------------------------------------------------
* Last change: Time-stamp: "01/02/12 00:35:28 jose"
* ------------------------------------------------------------------
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* 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 <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include "mix_config.h"
static const gchar COMMENT_PREFIX_ = '#';
static const gchar *DEF_DIR_ = ".mdk";
static const gchar *AUTOSAVE_KEY_ = "Autosave";
static const gchar *AUTOSAVE_YES_ = "True";
static const gchar *AUTOSAVE_NO_ = "False";
static const gchar *DEVICES_KEY_ = "DevicesDir";
/* the config type */
struct mix_config_t
{
gchar *filename; /* full path to configuration file */
gboolean autosave; /* whether save on destroy */
GHashTable *items; /* configuration items */
};
/* create a new config handler, giving the dir and name of the config file */
mix_config_t *
mix_config_new (const gchar *dirname, const gchar *filename)
{
static const gchar *DEF_DIRNAME_ = NULL;
static const gchar *DEF_FILENAME_ = "config";
const gchar *autosave;
FILE *f;
mix_config_t *result = NULL;
if (DEF_DIRNAME_ == NULL)
DEF_DIRNAME_ = g_strdup_printf ("%s/%s", g_get_home_dir (), DEF_DIR_);
if (dirname == NULL) dirname = DEF_DIRNAME_;
if (filename == NULL) filename = DEF_FILENAME_;
if (!mix_stat_dir (dirname, "configuration")) return NULL;
result = g_new (mix_config_t, 1);
result->filename = g_strdup_printf ("%s/%s", dirname, filename);
result->items = g_hash_table_new (g_str_hash, g_str_equal);
f = fopen (result->filename, "r");
if (f != NULL)
{
enum {LEN = 256};
gchar buffer[LEN];
gchar *line = buffer;
while (!feof (f))
{
line = fgets (line, LEN, f);
if (line) line = g_strstrip (line);
if (line && line[0] != COMMENT_PREFIX_)
{
gchar **vals = g_strsplit (line, "=", 2);
g_hash_table_insert (result->items,
(gpointer)g_strdup (g_strstrip (vals[0])),
(gpointer)g_strdup (g_strstrip (vals[1])));
g_strfreev (vals);
}
}
fclose (f);
}
autosave = mix_config_get (result, AUTOSAVE_KEY_);
result->autosave = autosave && !g_strcasecmp (autosave, AUTOSAVE_YES_);
return result;
}
/* delete a config handler, saving the configuration if needed */
void
mix_config_delete (mix_config_t *config)
{
g_return_if_fail (config != NULL);
if (mix_config_is_autosave (config)) mix_config_save (config);
g_free (config->filename);
g_hash_table_destroy (config->items);
g_free (config);
}
/* get the config filename */
const gchar *
mix_config_get_filename (const mix_config_t *config)
{
g_return_val_if_fail (config != NULL, NULL);
return config->filename;
}
/* get a config item's value from its key */
const gchar *
mix_config_get (const mix_config_t *config, const gchar *key)
{
g_return_val_if_fail (config != NULL, NULL);
g_return_val_if_fail (key != NULL, NULL);
return (const gchar*)g_hash_table_lookup (config->items, key);
}
/* update (or create if it does not exist) a new config item */
void
mix_config_update (mix_config_t *config, const gchar *key, const gchar *value)
{
gpointer tmp = NULL;
g_return_if_fail (config != NULL);
g_return_if_fail (key != NULL);
g_return_if_fail (value != NULL);
tmp = g_hash_table_lookup (config->items, key);
if (tmp)
{
g_free (tmp);
tmp = (gpointer)key;
}
else
{
tmp = (gpointer)g_strdup (key);
}
g_hash_table_insert (config->items, tmp, g_strdup (value));
}
/* save the current configuration */
static void
save_ (gpointer key, gpointer value, gpointer file)
{
fprintf ((FILE *)file, "%s=%s\n", (char *)key, (char *)value);
}
void
mix_config_save (const mix_config_t *config)
{
FILE *f;
g_return_if_fail (config != NULL);
f = fopen (config->filename, "w");
if (!f)
{
g_warning ("Unable to open config file %s (%s)",
config->filename, g_strerror (errno));
return;
}
g_hash_table_foreach (config->items, save_, (gpointer)f);
fclose (f);
}
/* set autosave on delete flag */
void
mix_config_set_autosave (mix_config_t *config, gboolean autosave)
{
mix_config_update (config, AUTOSAVE_KEY_,
autosave? AUTOSAVE_YES_ : AUTOSAVE_NO_);
config->autosave = autosave;
}
gboolean
mix_config_is_autosave (const mix_config_t *config)
{
g_return_val_if_fail (config != NULL, FALSE);
return config->autosave;
}
/* devices dir*/
void
mix_config_set_devices_dir (mix_config_t *config, const gchar *dirname)
{
g_return_if_fail (config != NULL);
g_return_if_fail (dirname != NULL);
if (mix_stat_dir (dirname, "devices"))
mix_config_update (config, DEVICES_KEY_, dirname);
}
extern const gchar *
mix_config_get_devices_dir (const mix_config_t *config)
{
g_return_val_if_fail (config != NULL, NULL);
return mix_config_get (config, DEVICES_KEY_);
}
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