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-rw-r--r--mixlib/mix_config.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/mixlib/mix_config.c b/mixlib/mix_config.c
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+++ b/mixlib/mix_config.c
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+/* -*-c-*- -------------- mix_config.c :
+ * Implementation of the functions declared in mix_config.h
+ * ------------------------------------------------------------------
+ * $Id: mix_config.c,v 1.12 2005/09/20 19:43:13 jao Exp $
+ * ------------------------------------------------------------------
+ * Copyright (C) 2001, 2002, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include "mix_config.h"
+
+const gchar *MIX_CONFIG_DIR = ".mdk";
+
+static const gchar COMMENT_PREFIX_ = '#';
+static const gchar *AUTOSAVE_KEY_ = "Autosave";
+static const gchar *AUTOSAVE_YES_ = "True";
+static const gchar *AUTOSAVE_NO_ = "False";
+static const gchar *DEVICES_KEY_ = "Devices.dir";
+static const gchar *HISTORY_KEY_ = "History.file";
+static const gchar *HISTORY_SIZE_KEY_ = "History.size";
+
+/* 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_strconcat (g_get_home_dir (), G_DIR_SEPARATOR_S,
+ MIX_CONFIG_DIR, NULL);
+
+ 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_strstrip (vals[0]),
+ (gpointer) g_strstrip (vals[1]));
+ }
+ }
+ fclose (f);
+ }
+
+ autosave = mix_config_get (result, AUTOSAVE_KEY_);
+ result->autosave = autosave && !g_ascii_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);
+}
+
+gint
+mix_config_get_integer (const mix_config_t *config, const gchar *key)
+{
+ const gchar *val;
+ g_return_val_if_fail (config != NULL, 0);
+ g_return_val_if_fail (key != NULL, 0);
+ val = mix_config_get (config, key);
+ if (!val) return 0;
+ return atoi (val);
+}
+
+/* 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 okey = NULL;
+ gpointer oval = NULL;
+
+ g_return_if_fail (config != NULL);
+ g_return_if_fail (key != NULL);
+ g_return_if_fail (value != NULL);
+
+ if (g_hash_table_lookup_extended (config->items, key, &okey, &oval))
+ {
+ if (oval != value)
+ {
+ g_free (oval);
+ oval = (gpointer)g_strdup (value);
+ }
+ }
+ else
+ {
+ okey = (gpointer)g_strdup (key);
+ oval = (gpointer)g_strdup (value);
+ }
+
+ g_hash_table_insert (config->items, okey, oval);
+}
+
+void
+mix_config_update_integer (mix_config_t *config, const gchar *key, gint value)
+{
+ gchar *val;
+
+ g_return_if_fail (config != NULL);
+ g_return_if_fail (key != NULL);
+
+ val = g_strdup_printf ("%d", value);
+ mix_config_update (config, key, val);
+ g_free (val);
+}
+
+void
+mix_config_remove (mix_config_t *config, const gchar *key)
+{
+ gchar *val;
+
+ g_return_if_fail (config != NULL);
+ g_return_if_fail (key != NULL);
+
+ val = g_hash_table_lookup (config->items, key);
+ if (val != NULL)
+ {
+ g_hash_table_remove (config->items, key);
+ g_free (val);
+ }
+}
+
+/* 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_);
+}
+
+/* history file. if relative path, config dir taken as root */
+void
+mix_config_set_history_file (mix_config_t *config, const gchar *path)
+{
+ g_return_if_fail (config != NULL);
+ g_return_if_fail (path != NULL);
+ if (g_path_is_absolute (path))
+ {
+ mix_config_update (config, HISTORY_KEY_, path);
+ }
+ else
+ {
+ gchar *base = g_path_get_dirname (config->filename);
+ gchar *hf = g_strconcat (base, G_DIR_SEPARATOR_S, path, NULL);
+ mix_config_update (config, HISTORY_KEY_, hf);
+ g_free (hf);
+ g_free (base);
+ }
+}
+
+const gchar *
+mix_config_get_history_file (const mix_config_t *config)
+{
+ g_return_val_if_fail (config != NULL, NULL);
+ return mix_config_get (config, HISTORY_KEY_);
+}
+
+void
+mix_config_set_history_size (mix_config_t *config, gint s)
+{
+ g_return_if_fail (config != NULL);
+ g_return_if_fail (s >= 0);
+ mix_config_update_integer (config, HISTORY_SIZE_KEY_, s);
+}
+
+gint
+mix_config_get_history_size (const mix_config_t *config)
+{
+ g_return_val_if_fail (config != NULL, 0);
+ return mix_config_get_integer (config, HISTORY_SIZE_KEY_);
+}