src/power/windows/SDL_syspower.c
changeset 3170 b7a48f533966
child 3186 51750b7a966f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/power/windows/SDL_syspower.c	Sun Jun 07 06:06:35 2009 +0000
@@ -0,0 +1,78 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2009 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef SDL_POWER_DISABLED
+#ifdef SDL_POWER_WINDOWS
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "SDL_power.h"
+
+SDL_bool
+SDL_GetPowerInfo_Windows(SDL_PowerState *state, int *seconds, int *percent)
+{
+    SYSTEM_POWER_STATUS status;
+    SDL_bool need_details = SDL_FALSE;
+
+    /* This API should exist back to Win95 and Windows CE. */
+    if (!GetSystemPowerStatus(&status)) {
+        /* !!! FIXME: push GetLastError() into SDL_GetError() */
+        *state = SDL_POWERSTATE_UNKNOWN;
+    } else if (status.BatteryFlag == 0xFF) {  /* unknown state */
+        *state = SDL_POWERSTATE_UNKNOWN;
+    } else if (status.BatteryFlag & (1 << 7)) {  /* no battery */
+        *state = SDL_POWERSTATE_NO_BATTERY;
+    } else if (status.BatteryFlag & (1 << 3)) {  /* charging */
+        *state = SDL_POWERSTATE_CHARGING;
+        need_details = SDL_TRUE;
+    } else if (status.ACLineStatus == 1) {
+        *state = SDL_POWERSTATE_CHARGED;  /* on AC, not charging. */
+        need_details = SDL_TRUE;
+    } else {
+        *state = SDL_POWERSTATE_ON_BATTERY;  /* not on AC. */
+        need_details = SDL_TRUE;
+    }
+
+    *percent = -1;
+    *seconds = -1;
+    if (need_details) {
+        const int pct = (int) status.BatteryLifePercent;
+        const int secs = (int) status.BatteryLifeTime;
+
+        if (pct != 255) {  /* 255 == unknown */
+            *percent = (pct > 100) ? 100 : pct;  /* clamp between 0%, 100% */
+        }
+        if (secs != 0xFFFFFFFF) {  /* ((DWORD)-1) == unknown */
+            *seconds = secs;
+        }
+    }
+
+    return SDL_TRUE;  /* always the definitive answer on Windows. */
+}
+
+#endif /* SDL_POWER_WINDOWS */
+#endif /* SDL_POWER_DISABLED */
+
+/* vi: set ts=4 sw=4 expandtab: */
+