peter1138@6417: /* $Id$ */
peter1138@6417: 
rubidium@10429: /** @file cargotype.cpp Implementation of cargos. */
belugas@6449: 
peter1138@6417: #include "stdafx.h"
peter1138@6417: #include "openttd.h"
peter1138@6417: #include "newgrf_cargo.h"
peter1138@6417: #include "cargotype.h"
rubidium@8609: #include "core/bitmath_func.hpp"
peter1138@6417: 
rubidium@8760: #include "table/sprites.h"
rubidium@8760: #include "table/strings.h"
peter1138@6417: #include "table/cargo_const.h"
peter1138@6417: 
peter1138@6685: CargoSpec _cargo[NUM_CARGO];
peter1138@6417: 
peter1138@6417: static const byte INVALID_CARGO = 0xFF;
peter1138@6417: 
peter1138@6474: /* Bitmask of cargo types available */
peter1138@6439: uint32 _cargo_mask;
peter1138@6439: 
peter1138@6417: 
peter1138@6417: void SetupCargoForClimate(LandscapeID l)
peter1138@6417: {
peter1138@6417: 	assert(l < lengthof(_default_climate_cargo));
peter1138@6417: 
peter1138@6417: 	/* Reset and disable all cargo types */
peter1138@6417: 	memset(_cargo, 0, sizeof(_cargo));
peter1138@6417: 	for (CargoID i = 0; i < lengthof(_cargo); i++) _cargo[i].bitnum = INVALID_CARGO;
peter1138@6417: 
peter1138@6439: 	_cargo_mask = 0;
peter1138@6439: 
peter1138@6417: 	for (CargoID i = 0; i < lengthof(_default_climate_cargo[l]); i++) {
peter1138@6417: 		CargoLabel cl = _default_climate_cargo[l][i];
peter1138@6417: 
peter1138@7136: 		/* Bzzt: check if cl is just an index into the cargo table */
peter1138@7136: 		if (cl < lengthof(_default_cargo)) {
peter1138@7136: 			/* Copy the indexed cargo */
peter1138@7136: 			_cargo[i] = _default_cargo[cl];
peter1138@8691: 			if (_cargo[i].bitnum != INVALID_CARGO) SetBit(_cargo_mask, i);
peter1138@7136: 			continue;
peter1138@7136: 		}
peter1138@7136: 
peter1138@6417: 		/* Loop through each of the default cargo types to see if
peter1138@6417: 		 * the label matches */
peter1138@6417: 		for (uint j = 0; j < lengthof(_default_cargo); j++) {
peter1138@6417: 			if (_default_cargo[j].label == cl) {
peter1138@6417: 				_cargo[i] = _default_cargo[j];
peter1138@6439: 
peter1138@6474: 				/* Populate the available cargo mask */
skidd13@8427: 				SetBit(_cargo_mask, i);
peter1138@6417: 				break;
peter1138@6417: 			}
peter1138@6417: 		}
peter1138@6417: 	}
peter1138@6417: }
peter1138@6417: 
peter1138@6417: 
peter1138@6417: const CargoSpec *GetCargo(CargoID c)
peter1138@6417: {
peter1138@6417: 	assert(c < lengthof(_cargo));
peter1138@6417: 	return &_cargo[c];
peter1138@6417: }
peter1138@6417: 
peter1138@6439: 
peter1138@6448: bool CargoSpec::IsValid() const
peter1138@6448: {
peter1138@6448: 	return bitnum != INVALID_CARGO;
peter1138@6448: }
peter1138@6469: 
peter1138@6469: 
peter1138@6469: CargoID GetCargoIDByLabel(CargoLabel cl)
peter1138@6469: {
peter1138@6469: 	for (CargoID c = 0; c < lengthof(_cargo); c++) {
peter1138@6686: 		if (_cargo[c].bitnum == INVALID_CARGO) continue;
peter1138@6469: 		if (_cargo[c].label == cl) return c;
peter1138@6469: 	}
peter1138@6469: 
peter1138@6469: 	/* No matching label was found, so it is invalid */
peter1138@6469: 	return CT_INVALID;
peter1138@6469: }
peter1138@6956: 
peter1138@6956: 
peter1138@6956: /** Find the CargoID of a 'bitnum' value.
peter1138@6956:  * @param bitnum 'bitnum' to find.
peter1138@6956:  * @return First CargoID with the given bitnum, or CT_INVALID if not found.
peter1138@6956:  */
peter1138@6956: CargoID GetCargoIDByBitnum(uint8 bitnum)
peter1138@6956: {
peter1138@6956: 	if (bitnum == INVALID_CARGO) return CT_INVALID;
peter1138@6956: 
peter1138@6956: 	for (CargoID c = 0; c < lengthof(_cargo); c++) {
peter1138@6956: 		if (_cargo[c].bitnum == bitnum) return c;
peter1138@6956: 	}
peter1138@6956: 
peter1138@6956: 	/* No matching label was found, so it is invalid */
peter1138@6956: 	return CT_INVALID;
peter1138@6956: }
peter1138@6956: