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/* $Id$ */

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/** @file macros.h */

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#ifndef MACROS_H

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#define MACROS_H

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#include "core/bitmath_func.hpp"

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#include "core/math_func.hpp"

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#define GENERAL_SPRITE_COLOR(color) ((color) + PALETTE_RECOLOR_START)

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#define PLAYER_SPRITE_COLOR(owner) (GENERAL_SPRITE_COLOR(_player_colors[owner]))

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/**

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 * Whether a sprite comes from the original graphics files or a new grf file

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 * (either supplied by OpenTTD or supplied by the user).

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 *

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 * @param sprite The sprite to check

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 * @return True if it is a new sprite, or false if it is original.

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 */

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#define IS_CUSTOM_SPRITE(sprite) ((sprite) >= SPR_SIGNALS_BASE)

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/**

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 * Do an operation for each set set bit in a value.

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 *

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 * This macros is used to do an operation for each set

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 * bit in a variable. The first variable can be reused

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 * in the operation due to it's the bit position counter.

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 * The second variable will be cleared during the usage

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 *

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 * @param i The position counter

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 * @param b The value which we check for set bits

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 */

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#define FOR_EACH_SET_BIT(i, b)            \

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	for (i = 0; b != 0; i++, b >>= 1) \

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		if (b & 1)

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static inline uint16 ReadLE16Aligned(const void* x)

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{

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	return FROM_LE16(*(const uint16*)x);

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}

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static inline uint16 ReadLE16Unaligned(const void* x)

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{

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#ifdef OTTD_ALIGNMENT

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	return ((const byte*)x)[0] | ((const byte*)x)[1] << 8;

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#else

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	return FROM_LE16(*(const uint16*)x);

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#endif

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}

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/** return the largest value that can be entered in a variable.

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 */

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#define MAX_UVALUE(type) ((type)~(type)0)

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#endif /* MACROS_H */