mirror of https://github.com/OpenTTD/OpenTTD.git
187 lines
5.5 KiB
C
187 lines
5.5 KiB
C
#ifndef MACROS_H
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#define MACROS_H
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#include "map.h"
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#define MAX_INT 0x7FFFFFFF
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#ifdef min
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#undef min
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#endif
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#ifdef max
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#undef max
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#endif
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static inline int min(int a, int b) { if (a <= b) return a; return b; }
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static inline int max(int a, int b) { if (a >= b) return a; return b; }
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static inline int64 max64(int64 a, int64 b) { if (a >= b) return a; return b; }
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static inline uint minu(uint a, uint b) { if (a <= b) return a; return b; }
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static inline uint maxu(uint a, uint b) { if (a >= b) return a; return b; }
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static inline int clamp(int a, int min, int max) { if (a <= min) return min; if (a >= max) return max; return a; }
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static inline int clamp2(int a, int min, int max) { if (a <= min) a=min; if (a >= max) a=max; return a; }
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static inline bool int32_add_overflow(int32 a, int32 b) { return (int32)(a^b)>=0 && (int32)(a^(a+b))<0; }
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static inline bool int32_sub_overflow(int32 a, int32 b) { return (int32)(a^b)<0 && (int32)(a^(a-b))<0; }
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static inline bool str_eq(const byte *a, const byte *b)
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{
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int i=0;
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while (a[i] == b[i]) {
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if (a[i] == 0)
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return true;
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i++;
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}
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return false;
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}
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// Will crash if strings are equal
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static inline bool str_is_below(byte *a, byte *b) {
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while (*a <= *b) {
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if (*a < *b) return true;
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a++;
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b++;
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}
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return false;
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}
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static inline int32 BIGMULSS(int32 a, int32 b, int shift) {
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return (int32)(((int64)(a) * (int64)(b)) >> (shift));
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}
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static inline int64 BIGMULSS64(int64 a, int64 b, int shift) {
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return ((a) * (b)) >> (shift);
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}
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static inline uint32 BIGMULUS(uint32 a, uint32 b, int shift) {
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return (uint32)(((uint64)(a) * (uint64)(b)) >> (shift));
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}
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static inline int64 BIGMULS(int32 a, int32 b) {
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return (int32)(((int64)(a) * (int64)(b)));
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}
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/* OPT: optimized into an unsigned comparison */
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//#define IS_INSIDE_1D(x, base, size) ((x) >= (base) && (x) < (base) + (size))
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#define IS_INSIDE_1D(x, base, size) ( (uint)((x) - (base)) < ((uint)(size)) )
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#define LANDSCAPE_SIZE_FACTOR 1
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enum {
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CORRECT_Z_BITS = 1 << 1 | 1 << 2 | 1 << 3 | 1 << 4 | 1 << 5 | 1 << 6 | 1 << 7
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};
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#define CORRECT_Z(tileh) (CORRECT_Z_BITS & (1 << tileh))
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#define TILE_ASSERT(x) assert( TILE_MASK(x) == (x) );
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//#define REMADP_COORDS(x,y,z) { int t = x; x = (y-t)*2; y+=t-z; }
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#define PACK_POINT(x,y) ((x) | ((y) << 16))
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#define UNPACK_POINT_X(p) ((uint16)(p))
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#define UNPACK_POINT_Y(p) ((uint16)(p>>16))
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#define PACK_PPOINT(p) PACK_POINT((p).x, (p).y)
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#define HASBIT(x,y) ((x) & (1 << (y)))
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#define SETBIT(x,y) ((x) |= (1 << (y)))
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#define CLRBIT(x,y) ((x) &= ~(1 << (y)))
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#define TOGGLEBIT(x,y) ((x) ^= (1 << (y)))
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// checking more bits. Maybe unneccessary, but easy to use
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#define HASBITS(x,y) ((x) & (y))
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#define SETBITS(x,y) ((x) |= (y))
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#define CLRBITS(x,y) ((x) &= ~(y))
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#define PLAYER_SPRITE_COLOR(owner) ((_player_colors[owner] << 16) + 0x3070000)
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#define SPRITE_PALETTE(x) ((x) + 0x8000)
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extern const byte _ffb_64[128];
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/* Returns the position of the first bit that is not zero, counted from the
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* left. Ie, 10110100 returns 2, 00000001 returns 0, etc. When x == 0 returns
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* 0.
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*/
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#define FIND_FIRST_BIT(x) _ffb_64[(x)]
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/* Returns x with the first bit that is not zero, counted from the left, set
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* to zero. So, 10110100 returns 10110000, 00000001 returns 00000000, etc.
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*/
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#define KILL_FIRST_BIT(x) _ffb_64[(x)+64]
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static inline int FindFirstBit2x64(int value)
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{
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int i = 0;
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if ( (byte) value == 0) {
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i += 8;
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value >>= 8;
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}
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return i + FIND_FIRST_BIT(value & 0x3F);
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}
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/* [min,max), strictly less than */
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#define IS_BYTE_INSIDE(a,min,max) ((byte)((a)-(min)) < (byte)((max)-(min)))
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#define IS_INT_INSIDE(a,min,max) ((uint)((a)-(min)) < (uint)((max)-(min)))
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#define CHANCE16(a,b) ((uint16)Random() <= (uint16)((65536 * a) / b))
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#define CHANCE16R(a,b,r) ((uint16)(r=Random()) <= (uint16)((65536 * a) / b))
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#define CHANCE16I(a,b,v) ((uint16)(v) <= (uint16)((65536 * a) / b))
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#define BEGIN_TILE_LOOP(var,w,h,tile) \
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{int h_cur = h; \
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uint var = tile; \
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do { \
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int w_cur = w; \
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do {
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#define END_TILE_LOOP(var,w,h,tile) \
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} while (++var, --w_cur != 0); \
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} while (var += TILE_XY(0,1) - (w), --h_cur != 0);}
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#define for_each_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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#define assert_array(i,j) assert(i < lengthof(j))
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#define abs myabs
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static inline int intxchg_(int *a, int b) { int t = *a; *a = b; return t; }
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#define intxchg(a,b) intxchg_(&(a), (b))
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#define intswap(a,b) ((b) = intxchg_(&(a), (b)))
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static inline int myabs(int a) { if (a<0) a = -a; return a; }
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static inline int64 myabs64(int64 a) { if (a<0) a = -a; return a; }
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static inline void swap_byte(byte *a, byte *b) { byte t = *a; *a = *b; *b = t; }
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static inline void swap_uint16(uint16 *a, uint16 *b) { uint16 t = *a; *a = *b; *b = t; }
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static inline void swap_int16(int16 *a, int16 *b) { int16 t = *a; *a = *b; *b = t; }
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static inline void swap_tile(TileIndex *a, TileIndex *b) { TileIndex t = *a; *a = *b; *b = t; }
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#if defined(TTD_LITTLE_ENDIAN)
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# define READ_LE_UINT16(b) (*(const uint16*)(b))
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# define ADD_WORD(x) (x)&0xFF, ((x) >> 8)&0xFF
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# define ADD_DWORD(x) (x)&0xFF, ((x) >> 8)&0xFF, ((x) >> 16)&0xFF, ((x) >> 24)&0xFF
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#elif defined(TTD_BIG_ENDIAN)
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static inline uint16 READ_LE_UINT16(const void *b) {
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return ((const byte*)b)[0] + (((const byte*)b)[1] << 8);
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}
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# define ADD_WORD(x) ((x) >> 8)&0xFF, (x)&0xFF
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# define ADD_DWORD(x) ((x) >> 24)&0xFF, ((x) >> 16)&0xFF, ((x) >> 8)&0xFF, (x)&0xFF
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#endif
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static inline void WRITE_LE_UINT16(void *b, uint16 x) {
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((byte*)b)[0] = (byte)x;
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((byte*)b)[1] = (byte)(x >> 8);
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}
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#define MAX_DETOUR 6
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#endif /* MACROS_H */
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