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/* Common functions for the Microsoft Windows and Cygwin builds.
Copyright (C) 2018-2023 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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.
GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
#include "lisp.h"
#include "w32common.h"
static Lisp_Object ATTRIBUTE_FORMAT_PRINTF (1, 2)
format_string (char const *format, ...)
{
va_list args;
va_start (args, format);
Lisp_Object str = vformat_string (format, args);
va_end (args);
return str;
}
DEFUN ("w32-battery-status", Fw32_battery_status, Sw32_battery_status, 0, 0, 0,
doc: /* Get power status information from Windows system.
The following %-sequences are provided:
%L AC line status (verbose)
%B Battery status (verbose)
%b Battery status, empty means high, `-' means low,
`!' means critical, and `+' means charging
%p Battery load percentage
%s Remaining time (to charge or discharge) in seconds
%m Remaining time (to charge or discharge) in minutes
%h Remaining time (to charge or discharge) in hours
%t Remaining time (to charge or discharge) in the form `h:min' */)
(void)
{
Lisp_Object status = Qnil;
SYSTEM_POWER_STATUS system_status;
if (GetSystemPowerStatus (&system_status))
{
Lisp_Object line_status, battery_status, battery_status_symbol;
Lisp_Object load_percentage, seconds, minutes, hours, remain;
long seconds_left = (long) system_status.BatteryLifeTime;
if (system_status.ACLineStatus == 0)
line_status = build_string ("off-line");
else if (system_status.ACLineStatus == 1)
line_status = build_string ("on-line");
else
line_status = build_string ("N/A");
if (system_status.BatteryFlag & 128)
{
battery_status = build_string ("N/A");
battery_status_symbol = empty_unibyte_string;
}
else if (system_status.BatteryFlag & 8)
{
battery_status = build_string ("charging");
battery_status_symbol = build_string ("+");
if (system_status.BatteryFullLifeTime != -1L)
seconds_left = system_status.BatteryFullLifeTime - seconds_left;
}
else if (system_status.BatteryFlag & 4)
{
battery_status = build_string ("critical");
battery_status_symbol = build_string ("!");
}
else if (system_status.BatteryFlag & 2)
{
battery_status = build_string ("low");
battery_status_symbol = build_string ("-");
}
else if (system_status.BatteryFlag & 1)
{
battery_status = build_string ("high");
battery_status_symbol = empty_unibyte_string;
}
else
{
battery_status = build_string ("medium");
battery_status_symbol = empty_unibyte_string;
}
if (system_status.BatteryLifePercent > 100)
load_percentage = build_string ("N/A");
else
load_percentage = format_string ("%d", system_status.BatteryLifePercent);
if (seconds_left < 0)
seconds = minutes = hours = remain = build_string ("N/A");
else
{
long m = seconds_left / 60;
seconds = format_string ("%ld", seconds_left);
minutes = format_string ("%ld", m);
hours = format_string ("%3.1f", seconds_left / 3600.0);
remain = format_string ("%ld:%02ld", m / 60, m % 60);
}
status = list (Fcons (make_fixnum ('L'), line_status),
Fcons (make_fixnum ('B'), battery_status),
Fcons (make_fixnum ('b'), battery_status_symbol),
Fcons (make_fixnum ('p'), load_percentage),
Fcons (make_fixnum ('s'), seconds),
Fcons (make_fixnum ('m'), minutes),
Fcons (make_fixnum ('h'), hours),
Fcons (make_fixnum ('t'), remain));
}
return status;
}
void
syms_of_w32cygwinx (void)
{
defsubr (&Sw32_battery_status);
}
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