src/power/SDL_power.c
changeset 3170 b7a48f533966
child 3173 510e3f36c04a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/power/SDL_power.c	Sun Jun 07 06:06:35 2009 +0000
@@ -0,0 +1,110 @@
+/*
+    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"
+#include "SDL_power.h"
+
+/*
+ * Returns SDL_TRUE if we have a definitive answer.
+ * SDL_FALSE to try next implementation.
+ */
+typedef SDL_bool
+(*SDL_GetPowerInfo_Impl)(SDL_PowerState *state, int *seconds, int *percent);
+
+SDL_bool SDL_GetPowerInfo_Linux_sys_power(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_Linux_proc_apci(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_OS2(SDL_PowerState*, int*, int*);
+SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState*, int*, int*);
+
+#ifndef SDL_POWER_DISABLED
+#ifdef SDL_POWER_HARDWIRED
+/* This is for things that _never_ have a battery, like the Dreamcast, etc. */
+static SDL_bool
+SDL_GetPowerInfo_Hardwired(SDL_PowerState *state, int *seconds, int *percent)
+{
+    *seconds = -1;
+    *percent = -1;
+    *state = SDL_POWERSTATE_NO_BATTERY;
+    return SDL_TRUE;
+}
+#endif
+#endif
+
+
+static SDL_GetPowerInfo_Impl implementations[] = {
+#ifndef SDL_POWER_DISABLED
+#ifdef SDL_POWER_LINUX /* in order of preference. More than could work. */
+    SDL_GetPowerInfo_Linux_sys_power,
+    SDL_GetPowerInfo_Linux_proc_apci,
+    SDL_GetPowerInfo_Linux_proc_apm,
+#endif
+#ifdef SDL_POWER_WINDOWS /* handles Win32, Win64, PocketPC. */
+    SDL_GetPowerInfo_Windows,
+#endif
+#ifdef SDL_POWER_MACOSX  /* handles Mac OS X, Darwin, iPhone. */
+    SDL_GetPowerInfo_MacOSX,
+#endif
+#ifdef SDL_POWER_OS2  /* handles OS/2, Warp, eComStation. */
+    SDL_GetPowerInfo_OS2,
+#endif
+#ifdef SDL_POWER_NINTENDODS  /* handles Nintendo DS. */
+    SDL_GetPowerInfo_NintendoDS,
+#endif
+#ifdef SDL_POWER_HARDWIRED
+    SDL_GetPowerInfo_Hardwired,
+#endif
+#endif
+};
+
+SDL_PowerState
+SDL_GetPowerInfo(int *seconds, int *percent)
+{
+    const int total = sizeof (implementations) / sizeof (implementations[0]);
+    int _seconds, _percent;
+    SDL_PowerState retval;
+    int i;
+
+    /* Make these never NULL for platform-specific implementations. */
+    if (seconds == NULL) {
+        seconds = &_seconds;
+    }
+
+    if (percent == NULL) {
+        percent = &_percent;
+    }
+
+    for (i = 0; i < total; i++) {
+        if (implementations[i](&retval, seconds, percent)) {
+            return retval;
+        }
+    }
+
+    /* nothing was definitive. */
+    *seconds = -1;
+    *percent = -1;
+    return SDL_POWERSTATE_UNKNOWN;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
+