Add sdl_power:get_info/0 function to retrieve battery info

1 files changed, 40 insertions, 0 deletions

diff --git a/c_src/sdl_power.c b/c_src/sdl_power.c
new file mode 100644
index 0000000..e8c20f3
--- /dev/null
+++ b/c_src/sdl_power.c
@@ -0,0 +1,40 @@
+// Copyright (c) 2014, Loïc Hoguin <[email protected]>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+#include "esdl2.h"
+
+#define POWER_STATE_ENUM(E) \
+	E(unknown, SDL_POWERSTATE_UNKNOWN) \
+	E(on_battery, SDL_POWERSTATE_ON_BATTERY) \
+	E(no_battery, SDL_POWERSTATE_NO_BATTERY) \
+	E(charging, SDL_POWERSTATE_CHARGING) \
+	E(charged, SDL_POWERSTATE_CHARGED)
+
+NIF_ENUM_TO_ATOM_FUNCTION(power_state_to_atom, SDL_PowerState, POWER_STATE_ENUM)
+
+// get_power_info
+
+NIF_FUNCTION(get_power_info)
+{
+	SDL_PowerState state;
+	int secs, pct;
+
+	state = SDL_GetPowerInfo(&secs, &pct);
+
+	return enif_make_tuple3(env,
+		power_state_to_atom(state),
+		enif_make_int(env, secs),
+		enif_make_int(env, pct)
+	);
+}