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/*
Calf Box, an open source musical instrument.
Copyright (C) 2010 Krzysztof Foltman
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config-api.h"
#include <errno.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static GKeyFile *config_keyfile;
static gchar *keyfile_name;
static GStringChunk *cfg_strings = NULL;
static GHashTable *config_sections_hash = NULL;
void cbox_config_init(const char *override_file)
{
const gchar *keyfiledirs[3];
const gchar *keyfilename = ".cboxrc";
GKeyFileFlags flags = G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS;
GError *error = NULL;
if (config_keyfile)
return;
config_sections_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
cfg_strings = g_string_chunk_new(100);
config_keyfile = g_key_file_new();
// Allow virtual (in-memory) config by passing empty string
if (override_file && !*override_file)
{
keyfile_name = g_strdup("");
return;
}
keyfiledirs[0] = getenv("HOME");
keyfiledirs[1] = NULL;
// XXXKF add proper error handling
if (override_file)
{
if (!g_key_file_load_from_file(config_keyfile, override_file, flags, &error))
{
g_warning("Could not read user config: %s", error->message);
g_error_free(error);
}
else
{
keyfile_name = g_strdup(override_file);
g_message("User config pathname is %s", keyfile_name);
return;
}
}
if (!g_key_file_load_from_dirs(config_keyfile, keyfilename, keyfiledirs, &keyfile_name, flags, &error))
{
g_warning("Could not read cboxrc: %s, search dir = %s, filename = %s", error->message, keyfiledirs[0], keyfilename);
g_error_free(error);
}
else
{
g_message("Config pathname is %s", keyfile_name);
}
}
int cbox_config_has_section(const char *section)
{
return section && g_key_file_has_group(config_keyfile, section);
}
char *cbox_config_get_string(const char *section, const char *key)
{
return cbox_config_get_string_with_default(section, key, NULL);
}
void cbox_config_set_string(const char *section, const char *key, const char *value)
{
g_key_file_set_string(config_keyfile, section, key, value);
}
char *cbox_config_permify(const char *temporary)
{
return g_string_chunk_insert(cfg_strings, temporary);
}
char *cbox_config_get_string_with_default(const char *section, const char *key, char *def_value)
{
if (section && key && g_key_file_has_key(config_keyfile, section, key, NULL))
{
gchar *tmp = g_key_file_get_string(config_keyfile, section, key, NULL);
gchar *perm = g_string_chunk_insert(cfg_strings, tmp);
g_free(tmp);
return perm;
}
else
{
return def_value ? g_string_chunk_insert(cfg_strings, def_value) : NULL;
}
}
int cbox_config_get_int(const char *section, const char *key, int def_value)
{
GError *error = NULL;
int result;
if (!section || !key)
return def_value;
result = g_key_file_get_integer(config_keyfile, section, key, &error);
if (error)
{
g_error_free(error);
return def_value;
}
return result;
}
void cbox_config_set_int(const char *section, const char *key, int value)
{
g_key_file_set_integer(config_keyfile, section, key, value);
}
float cbox_config_get_float(const char *section, const char *key, float def_value)
{
GError *error = NULL;
float result;
if (!section || !key)
return def_value;
result = g_key_file_get_double(config_keyfile, section, key, &error);
if (error)
{
g_error_free(error);
return def_value;
}
return result;
}
void cbox_config_set_float(const char *section, const char *key, double value)
{
g_key_file_set_double(config_keyfile, section, key, value);
}
float cbox_config_get_gain(const char *section, const char *key, float def_value)
{
GError *error = NULL;
float result;
if (!section || !key)
return def_value;
result = g_key_file_get_double(config_keyfile, section, key, &error);
if (error)
{
g_error_free(error);
return def_value;
}
return pow(2.0, result / 6.0);
}
float cbox_config_get_gain_db(const char *section, const char *key, float def_value)
{
return cbox_config_get_gain(section, key, pow(2.0, def_value / 6.0));
}
void cbox_config_foreach_section(void (*process)(void *user_data, const char *section), void *user_data)
{
gsize i, length = 0;
gchar **groups = g_key_file_get_groups (config_keyfile, &length);
if (!groups)
return;
for (i = 0; i < length; i++)
{
process(user_data, groups[i]);
}
g_strfreev(groups);
}
void cbox_config_foreach_key(void (*process)(void *user_data, const char *key), const char *section, void *user_data)
{
gsize i, length = 0;
gchar **keys = g_key_file_get_keys (config_keyfile, section, &length, NULL);
if (!keys)
return;
for (i = 0; i < length; i++)
{
process(user_data, keys[i]);
}
g_strfreev(keys);
}
int cbox_config_remove_section(const char *section)
{
return 0 != g_key_file_remove_group(config_keyfile, section, NULL);
}
int cbox_config_remove_key(const char *section, const char *key)
{
return 0 != g_key_file_remove_key(config_keyfile, section, key, NULL);
}
gboolean cbox_config_save(const char *filename, GError **error)
{
gsize len = 0;
gchar *data = g_key_file_to_data(config_keyfile, &len, error);
if (!data)
return FALSE;
if (filename == NULL)
filename = keyfile_name;
gboolean ok = g_file_set_contents(filename, data, len, error);
g_free(data);
return ok;
}
struct cbox_cfgfile
{
gchar *libname;
gchar *filename;
GKeyFile *keyfile;
};
struct cbox_cfgfile *cbox_cfgfile_get_by_libname(const char *name)
{
// XXXKF implement
return NULL;
}
struct cbox_sectref
{
struct cbox_cfgfile *cfgfile;
gchar *section;
};
static struct cbox_sectref *cbox_sectref_lookup(const char *name)
{
struct cbox_sectref *sr = g_hash_table_lookup(config_sections_hash, name);
return sr;
}
static void cbox_sectref_keep(struct cbox_sectref *sect)
{
gchar *tmp = g_strdup_printf("%s@%s", sect->section, sect->cfgfile->libname);
g_hash_table_insert(config_sections_hash, tmp, sect);
g_free(tmp);
}
static void cbox_sectref_set_from_string(struct cbox_sectref *sr, const gchar *refname, struct cbox_cfgfile *default_lib)
{
const gchar *p = strchr(refname, '@');
if (p)
{
sr->section = g_strndup(refname, p - refname);
sr->cfgfile = cbox_cfgfile_get_by_libname(p + 1);
}
else
{
sr->section = g_strndup(refname, p - refname);
sr->cfgfile = default_lib;
}
}
// find the section 'prefix+refname.section' in the config file - either the one referenced by sect, or refname.file
struct cbox_sectref *cbox_config_sectref(struct cbox_sectref *sect, const char *prefix, const char *refname)
{
if (!prefix)
prefix = "";
gchar *tmpsect = NULL;
const char *p = strchr(refname, '@');
if (p)
tmpsect = g_strdup_printf("%s%s", prefix, refname);
else
tmpsect = g_strdup_printf("%s%s@%s", prefix, refname, sect->cfgfile->libname);
struct cbox_sectref *sr = cbox_sectref_lookup(tmpsect);
if (sr)
{
g_free(tmpsect);
return sr;
}
sr = malloc(sizeof(struct cbox_sectref));
cbox_sectref_set_from_string(sr, tmpsect, sect ? sect->cfgfile : NULL);
g_free(tmpsect);
cbox_sectref_keep(sr);
return sr;
}
struct cbox_sectref *cbox_config_get_sectref(struct cbox_sectref *sect, const char *prefix, const char *key)
{
if (!key || !sect)
return NULL;
//const char *sectname = cbox_config_get_string(sect, key);
const char *sectname = cbox_config_get_string(sect->section, key);
if (!sectname)
return NULL;
return cbox_config_sectref(sect, prefix, sectname);
}
struct cbox_sectref *cbox_config_get_sectref_n(struct cbox_sectref *sect, const char *prefix, const char *key, int index)
{
if (!key || !sect)
return NULL;
gchar *tmp = g_strdup_printf("%s%d", key, index);
struct cbox_sectref *sr = cbox_config_get_sectref(sect, prefix, tmp);
g_free(tmp);
return sr;
}
struct cbox_sectref *cbox_config_get_sectref_suffix(struct cbox_sectref *sect, const char *prefix, const char *key, const char *suffix)
{
if (!key || !sect)
return NULL;
gchar *tmp = g_strdup_printf("%s%s", key, suffix ? suffix : "");
struct cbox_sectref *sr = cbox_config_get_sectref(sect, prefix, tmp);
g_free(tmp);
return sr;
}
void cbox_config_close()
{
if (config_sections_hash)
{
g_hash_table_destroy(config_sections_hash);
config_sections_hash = NULL;
}
if (config_keyfile)
{
g_key_file_free(config_keyfile);
config_keyfile = NULL;
}
if (cfg_strings)
{
g_string_chunk_free(cfg_strings);
cfg_strings = NULL;
}
if (keyfile_name)
{
g_free(keyfile_name);
keyfile_name = NULL;
}
}