#include "global.h"
#include "code_800C9CC.h"
#include "cpu.h"
#include "random.h"
#include "reg_control.h"

// Todo: Figure out if this file could be merged with bg_control and cpu?
EWRAM_INIT u32 gUnknown_203B0B8 = {0};

// Should be arm9.bin02008A00, but it's way different
void WaitForNextFrameAndAdvanceRNG(void)
{
    sub_800BA5C();
    gUnknown_203B0B8++;

    if (gRawKeyInput & (A_BUTTON | SELECT_BUTTON))
        Rand32Bit();

    Rand32Bit();
}

UNUSED static u32 sub_800CB50(void)
{
    return gUnknown_203B0B8;
}

UNUSED static void nullsub_180(void)
{
}

// Should be arm9.bin::020084D4, but it's way different
void xxx_call_update_bg_sound_input(void)
{
    xxx_update_bg_sound_input();
}

UNUSED static void nullsub_181(void)
{
}

UNUSED static bool8 sub_800CB70(void)
{
    return FALSE;
}

void ReadKeyInput(Inputs *r0)
{
    u16 keyInput = REG_KEYINPUT ^ KEYS_MASK;
    r0->held = 0;

    if (keyInput & DPAD_UP)
        r0->held = DPAD_UP;

    if (keyInput & DPAD_DOWN)
        r0->held |= DPAD_DOWN;

    if (keyInput & DPAD_LEFT)
        r0->held |= DPAD_LEFT;

    if (keyInput & DPAD_RIGHT)
        r0->held |= DPAD_RIGHT;

    if (keyInput & A_BUTTON)
        r0->held |= A_BUTTON;

    if (keyInput & B_BUTTON)
        r0->held |= B_BUTTON;

    if (keyInput & START_BUTTON)
        r0->held |= START_BUTTON;

    if (keyInput & SELECT_BUTTON)
        r0->held |= SELECT_BUTTON;

    if (keyInput & R_BUTTON)
        r0->held |= R_BUTTON;

    if (keyInput & L_BUTTON)
        r0->held |= L_BUTTON;

    gRawKeyInput = keyInput;
}