diff options
Diffstat (limited to 'mixlib/mix_config.c')
| -rw-r--r-- | mixlib/mix_config.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/mixlib/mix_config.c b/mixlib/mix_config.c new file mode 100644 index 0000000..694b18b --- /dev/null +++ b/mixlib/mix_config.c @@ -0,0 +1,298 @@ +/* -*-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_); +} |