source_of_the_sovereign/src/battle_engine/entry_hazards.c

#include "battle_help.h"
#include <bpre.h>

extern void* bs_stealth_rock;
extern void* bs_toxic_spikes;
extern void* bs_toxic_spikes_bad;
extern void* bs_sticky_web;
extern void* bs_toxic_resolve;

extern void* bs_spikes_lain;
extern void* bs_rocks_lain;
extern void* bs_toxic_lain;
extern void* bs_sticky_lain;

u8 execute_entry_hazards()
{
	u8 active_side = get_side_from_bank(battle_active_bank);
	u8 has_effect = 0;
	struct side_affecting* active_side_affecting = &custom_battle_struct.ptr->side_affecting[active_side];
	if(side_affecting_halfword[active_side].spikes_on && !(side_affecting_halfword[active_side].spikes_damage_done))
	{
		//spikes lay down, deal spiky damage
		u32 damage = (battle_participants[battle_active_bank].max_hp) / ((5 - battle_side_timers[active_side].spikes_amount) * 2);
        if (damage == 0)
            damage = 1;
        battle_damage_store = damage;
		
		side_affecting_halfword[active_side].spikes_damage_done = 1;
		battle_script_push();
		battlescript_cursor = (void*)(0x081D8CBE);
		has_effect = 1;
	}
	else if(active_side_affecting->stealth_rock && !(active_side_affecting->stealth_rock_done))
	{
		active_side_affecting->stealth_rock_done=1;
		//check for magic guard here
		u32 damage = battle_participants[battle_active_bank].max_hp;
		switch (type_effectiveness_calc(MOVE_STEALTH_ROCK, TYPE_ROCK, battle_active_bank^1, battle_active_bank, 0) >> 4)
		{
			case 1:
				damage = damage >> 5;
				break;
			case 2:
				damage = damage >> 4;
				break;
			case 4:
				damage = damage >> 3;
				break;
			case 8:
				damage = damage >> 2;
				break;
			case 16:
				damage = damage >> 1;
				break;
		}
		if(damage == 0)
			damage = 1;
		battle_damage_store = damage;
		
		battle_script_push();
		battlescript_cursor = bs_stealth_rock;
		has_effect = 1;
	}
	else if(active_side_affecting->toxic_spikes_psn && !(active_side_affecting->toxic_spikes_done))
	{
		active_side_affecting->toxic_spikes_done=1;
		if(has_type(battle_active_bank, TYPE_POISON))
		{
			has_effect = 1;
			active_side_affecting->toxic_spikes_psn=0;
			active_side_affecting->toxic_spikes_badpsn=0;
			battle_script_push();
			battlescript_cursor = bs_toxic_resolve;
		}
		else if(!cant_poison(battle_active_bank, 0))
		{
			if (active_side_affecting->toxic_spikes_badpsn)
			{
				battle_participants[battle_active_bank].status.flags.toxic_poison = 1;
				battle_script_push();
				battlescript_cursor = bs_toxic_spikes_bad;
			}
                
            else
			{
				battle_participants[battle_active_bank].status.flags.poison = 1;
				battle_script_push();
				battlescript_cursor = bs_toxic_spikes;
			}
            prepare_setattributes_in_battle(0, REQUEST_STATUS_BATTLE, 0, 4, &battle_participants[battle_active_bank].status.flags);
            mark_buffer_bank_for_execution(battle_active_bank);
			has_effect = 1;
		}
	}
	else if(active_side_affecting->sticky_web && !(active_side_affecting->sticky_web_done) && battle_participants[battle_active_bank].spd_buff != 0)
	{
		active_side_affecting->sticky_web_done=1;
        battle_script_push();
        battlescript_cursor = bs_sticky_web;
        battle_stat_changer = 0x93;
        has_effect = 1;
	}
	
	if (has_effect)
    {
       custom_battle_struct.ptr->various.var1 = battle_active_bank;
       battle_participants[battle_active_bank].status2.destinny_bond = 0;
       battle_hitmarker &= 0xFFFFFFBF;
    }
	return has_effect;
}

u8 lay_entry_hazards()
{
	u8 target_side = get_side_from_bank(battle_defender_bank);
	u8 fail=0;
	struct side_affecting* target_side_struct = &custom_battle_struct.ptr->side_affecting[target_side];
	switch(battle_executed_move)
	{
		case MOVE_SPIKES:
			if(battle_side_timers[target_side].spikes_amount < 3)
			{
				battle_side_timers[target_side].spikes_amount++;
				side_affecting_halfword[target_side].spikes_on = 1;
				battlescript_cursor = bs_spikes_lain;
			}
			else
			{
				fail = 1;
			}
			break;
		case MOVE_STEALTH_ROCK:
			if(target_side_struct->stealth_rock==0)
			{	
				target_side_struct->stealth_rock=1;
				battlescript_cursor = bs_rocks_lain;
			}
			else
				fail=1;
			break;
		case MOVE_TOXIC_SPIKES:
			if(target_side_struct->toxic_spikes_psn==0)
			{
				target_side_struct->toxic_spikes_psn=1;
				battlescript_cursor = bs_toxic_lain;
			}
			else if(target_side_struct->toxic_spikes_badpsn==0)
			{
				target_side_struct->toxic_spikes_badpsn=1;
				battlescript_cursor = bs_toxic_lain;
			}
			else
				fail=1;
			break;
		case MOVE_STICKY_WEB:
			if(target_side_struct->sticky_web==0)
			{
				target_side_struct->sticky_web=1;
				battlescript_cursor = bs_sticky_lain;
			}
			else
				fail=1;
			break;
		default:
			fail=1;
			break;
	}
	if(fail)
	{
		//failed execution
		battlescript_cursor = (void*) (0x081D7DF0);
	}
	return 1;
}