148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/**
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*
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* Copyright (c) 2022 Fabio Manganiello, see the file AUTHORS for details.
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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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <glib.h>
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#include "dbus.h"
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static DBusConnection* conn;
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static DBusConnection *dbus_connect()
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{
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DBusError err;
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dbus_error_init(&err);
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conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
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if (dbus_error_is_set(&err))
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{
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fprintf(stderr, "Connection Error (%s)\n", err.message);
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dbus_error_free(&err);
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}
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if (!conn)
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{
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fprintf(stderr, "Cannot initialize the DBus connection");
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exit(1);
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}
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return conn;
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}
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static void add_signal_listener()
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{
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DBusError err;
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dbus_bus_add_match(
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conn,
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"type='signal',interface='io.cutiepi.interface',path='/mcu'",
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&err);
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dbus_connection_flush(conn);
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if (dbus_error_is_set(&err))
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{
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fprintf(stderr, "Match Error (%s)\n", err.message);
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exit(1);
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}
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}
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static void reset_battery_info(BatteryInfo* info)
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{
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info->_is_parsed[0] = info->_is_parsed[1] = false;
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}
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static bool is_battery_info_parsed(BatteryInfo* info)
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{
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return info->_is_parsed[0] && info->_is_parsed[1];
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}
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static void process_signal(DBusMessage* msg, DBusMessageIter* iter, BatteryInfo* info)
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{
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char current_type;
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char* str_val = NO_STRING_VAL;
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int int_val = NO_INT_VAL;
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while ((current_type = dbus_message_iter_get_arg_type(iter)) != DBUS_TYPE_INVALID)
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{
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if (current_type == DBUS_TYPE_STRING)
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dbus_message_iter_get_basic(iter, &str_val);
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else if (current_type == DBUS_TYPE_INT32)
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dbus_message_iter_get_basic(iter, &int_val);
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if (strlen(str_val) && int_val != NO_INT_VAL)
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{
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if (!strncmp(str_val, BATTERY_LEVEL_VARNAME, strlen(str_val)-1))
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{
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info->level = (int) MIN(MAX(((int_val * 100) / MAX_BATTERY_VOLTAGE), 0), 100);
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info->_is_parsed[0] = true;
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}
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else if (!strncmp(str_val, BATTERY_STATE_VARNAME, strlen(str_val)-1))
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{
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info->is_charging = int_val == BATTERY_STATE_CHARGING;
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info->_is_parsed[1] = true;
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}
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str_val = NO_STRING_VAL;
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int_val = NO_INT_VAL;
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}
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dbus_message_iter_next(iter);
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}
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}
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void dbus_init()
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{
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dbus_connect();
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add_signal_listener();
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}
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void get_battery_info(BatteryInfo* info)
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{
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DBusMessage* msg;
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DBusMessageIter iter;
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reset_battery_info(info);
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while (!is_battery_info_parsed(info))
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{
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dbus_connection_read_write(conn, 0);
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msg = dbus_connection_pop_message(conn);
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if (!msg)
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{
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sleep(1);
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continue;
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}
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if (dbus_message_is_signal(msg, "io.cutiepi.interface", "updateEvent"))
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{
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if (!dbus_message_iter_init(msg, &iter))
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fprintf(stderr, "Message has no arguments!\n");
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else
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process_signal(msg, &iter, info);
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}
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dbus_message_unref(msg);
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}
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}
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