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/* $Id$ */
/** @file cargotype.cpp */
#include "stdafx.h"
#include "openttd.h"
#include "macros.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "newgrf_cargo.h"
#include "cargotype.h"
#include "table/cargo_const.h"
static CargoSpec _cargo[NUM_CARGO];
static const byte INVALID_CARGO = 0xFF;
/* Quick mapping from cargo type 'bitnums' to real cargo IDs */
static CargoID _cargo_bitnum_map[32];
/* Bitmask of cargo type 'bitnums' availabe */
uint32 _cargo_mask;
void SetupCargoForClimate(LandscapeID l)
{
assert(l < lengthof(_default_climate_cargo));
/* Reset and disable all cargo types */
memset(_cargo, 0, sizeof(_cargo));
for (CargoID i = 0; i < lengthof(_cargo); i++) _cargo[i].bitnum = INVALID_CARGO;
memset(_cargo_bitnum_map, CT_INVALID, sizeof(_cargo_bitnum_map));
_cargo_mask = 0;
for (CargoID i = 0; i < lengthof(_default_climate_cargo[l]); i++) {
CargoLabel cl = _default_climate_cargo[l][i];
/* Loop through each of the default cargo types to see if
* the label matches */
for (uint j = 0; j < lengthof(_default_cargo); j++) {
if (_default_cargo[j].label == cl) {
_cargo[i] = _default_cargo[j];
/* Populate the bitnum map and masks */
byte bitnum = _cargo[i].bitnum;
if (bitnum < lengthof(_cargo_bitnum_map)) {
_cargo_bitnum_map[bitnum] = i;
SETBIT(_cargo_mask, bitnum);
}
break;
}
}
}
}
const CargoSpec *GetCargo(CargoID c)
{
assert(c < lengthof(_cargo));
return &_cargo[c];
}
CargoID GetCargoIDByBitnum(byte bitnum)
{
assert(bitnum < lengthof(_cargo_bitnum_map));
assert(_cargo_bitnum_map[bitnum] != CT_INVALID);
return _cargo_bitnum_map[bitnum];
}
bool CargoSpec::IsValid() const
{
return bitnum != INVALID_CARGO;
}
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