/**
* Check if the given tile is a valid destination. In case of for example
* a carry-all it checks if the unit carrying can be placed on destination.
* In case of structures, it checks if you can walk into it.
*
* Stack: 1 - An encoded tile, indicating the destination.
*
* @param script The script engine to operate on.
* @return ??.
*/
uint16 Script_Unit_IsValidDestination(ScriptEngine *script)
{
Unit *u;
Unit *u2;
uint16 encoded;
uint16 index;
u = g_scriptCurrentUnit;
encoded = STACK_PEEK(1);
index = Tools_Index_Decode(encoded);
switch (Tools_Index_GetType(encoded)) {
case IT_TILE:
if (!Map_IsValidPosition(index)) return 1;
if (u->o.linkedID == 0xFF) return 1;
u2 = Unit_Get_ByIndex(u->o.linkedID);
u2->o.position = Tools_Index_GetTile(encoded);
if (!Unit_IsTileOccupied(u2)) return 0;
u2->o.position.tile = 0xFFFFFFFF;
return 1;
case IT_STRUCTURE: {
Structure *s;
s = Structure_Get_ByIndex(index);
if (s->o.houseID == Unit_GetHouseID(u)) return 0;
if (u->o.linkedID == 0xFF) return 1;
u2 = Unit_Get_ByIndex(u->o.linkedID);
return Unit_IsValidMovementIntoStructure(u2, s) != 0 ? 1 : 0;
}
default: return 1;
}
}
/**
* @brief f__167E_0005_0013_AF0C.
* @details Removed guard for IT_UNIT.
*/
bool Tools_Index_IsValid(uint16 encoded)
{
if (encoded == 0)
return false;
uint16 index = Tools_Index_Decode(encoded);
switch (Tools_Index_GetType(encoded))
{
case IT_UNIT:
{
const Unit* u = Unit_Get_ByIndex(index);
return u->o.flags.s.used && u->o.flags.s.allocated;
}
case IT_STRUCTURE:
{
const Structure* s = Structure_Get_ByIndex(index);
return s->o.flags.s.used;
}
case IT_TILE:
case IT_NONE:
default:
return true;
}
return false;
}