mirror of https://github.com/OpenTTD/OpenTTD.git
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* $Id$ */
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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 */
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