- /* 
- This Software is distributed with the following X11 License, 
- sometimes also known as MIT license. 
-   
- Copyright (c) 2010 Miguel A. Ballicora 
-   
-  Permission is hereby granted, free of charge, to any person 
-  obtaining a copy of this software and associated documentation 
-  files (the "Software"), to deal in the Software without 
-  restriction, including without limitation the rights to use, 
-  copy, modify, merge, publish, distribute, sublicense, and/or sell 
-  copies of the Software, and to permit persons to whom the 
-  Software is furnished to do so, subject to the following 
-  conditions: 
-   
-  The above copyright notice and this permission notice shall be 
-  included in all copies or substantial portions of the Software. 
-   
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
-  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
-  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
-  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
-  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
-  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
-  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
-  OTHER DEALINGS IN THE SOFTWARE. 
- */ 
-   
- #include <stdlib.h> 
- #include <stdio.h> 
- #include "gtb-att.h" 
-   
- #if 0 
-   
- #include "mtypes.h"  
- #include "bool_t.h"  
- #include "maindef.h"  
-   
- #else 
-   
- /* mtypes.h */ 
-   
- typedef unsigned int SQUARE; 
- typedef unsigned char SQ_CONTENT; 
-   
- /* bool_t.h */ 
-   
- #if !defined(bool_t) 
- typedef int                                             bool_t; 
- #endif 
-   
- #if !defined(TRUE) 
- #define TRUE ((bool_t)1) 
- #endif 
-   
- #if !defined(FALSE) 
- #define FALSE ((bool_t)0) 
- #endif 
-   
- /* maindef.h */ 
-   
- #define NOPIECE 0u 
- #define PAWN    1u 
- #define KNIGHT  2u 
- #define BISHOP  3u 
- #define ROOK    4u 
- #define QUEEN   5u 
- #define KING    6u 
- #define PIECE_MASK (KING|PAWN|KNIGHT|BISHOP|ROOK|QUEEN) 
-   
- /*Whites*/ 
- #define wK (KING   | WHITES) 
- #define wP (PAWN   | WHITES) 
- #define wN (KNIGHT | WHITES) 
- #define wB (BISHOP | WHITES) 
- #define wR (ROOK   | WHITES) 
- #define wQ (QUEEN  | WHITES) 
-   
- /*Blacks*/ 
- #define bK (KING   | BLACKS) 
- #define bP (PAWN   | BLACKS) 
- #define bN (KNIGHT | BLACKS) 
- #define bB (BISHOP | BLACKS) 
- #define bR (ROOK   | BLACKS) 
- #define bQ (QUEEN  | BLACKS) 
-   
- /*Bits that define color */ 
-   
- #define WHITES (1u<<6) 
- #define BLACKS (1u<<7) 
-   
- /*squares*/ 
- enum SQUARES { 
-         A1,B1,C1,D1,E1,F1,G1,H1, 
-         A2,B2,C2,D2,E2,F2,G2,H2, 
-         A3,B3,C3,D3,E3,F3,G3,H3, 
-         A4,B4,C4,D4,E4,F4,G4,H4, 
-         A5,B5,C5,D5,E5,F5,G5,H5, 
-         A6,B6,C6,D6,E6,F6,G6,H6, 
-         A7,B7,C7,D7,E7,F7,G7,H7, 
-         A8,B8,C8,D8,E8,F8,G8,H8, 
-         NOSQUARE, 
-         ERRSQUARE = 128 
- }; 
- #endif 
-   
- /*----------------------------------------------------------------------*/ 
-   
- #ifndef NDEBUG 
- #define NDEBUG 
- #endif 
- #ifdef DEBUG 
- #undef NDEBUG 
- #endif 
- #include "assert.h" 
-   
- /*----------------------------------------------------------------------*/ 
-   
- /* global variables */ 
- uint64_t Reach [7] [64]; 
-   
- /* static variables */ 
- static unsigned char    attmap [64] [64]; 
- static unsigned int             attmsk [256]; 
-   
- /* static functions */ 
- static unsigned int mapx88 (unsigned int x); 
-   
- /* macros */ 
- #define BB_ISBITON(bb,bit)   (0 != (((bb)>>(bit)) & U64(1))) 
-   
- #define map88(x)    (   (x) + ((x)&070)        ) 
- #define unmap88(x)  ( ( (x) + ((x)& 07) ) >> 1 ) 
-   
- /*----------------------------------------------------------------------*/ 
-   
- static unsigned int 
- mapx88 (unsigned int x) 
- { 
-         return ((x & 070) << 1) | (x & 07); 
- } 
-   
-   
- void 
- attack_maps_init(void) 
- { 
-         int i; 
-         unsigned int m, from, to; 
-         unsigned int to88, fr88; 
-         int diff;        
-   
-         uint64_t rook, bishop, queen, knight, king; 
-   
-         if (!reach_was_initialized()) { 
-                 printf ("Wrong initialization order of data\n"); 
-         } 
-   
-         for (i = 0; i < 256; ++i) { 
-                 attmsk [i] = 0; 
-         } 
-         attmsk[wP]              = 1 << 0; 
-         attmsk[bP]              = 1 << 1; 
-   
-         attmsk[KNIGHT]  = 1 << 2; 
-         attmsk[wN]              = 1 << 2; 
-         attmsk[bN]              = 1 << 2; 
-   
-         attmsk[BISHOP]  = 1 << 3; 
-         attmsk[wB]              = 1 << 3; 
-         attmsk[bB]              = 1 << 3; 
-   
-         attmsk[ROOK  ]  = 1 << 4; 
-         attmsk[wR]              = 1 << 4; 
-         attmsk[bR]              = 1 << 4; 
-   
-         attmsk[QUEEN ]  = 1 << 5; 
-         attmsk[wQ]              = 1 << 5; 
-         attmsk[bQ]              = 1 << 5; 
-   
-         attmsk[KING  ]  = 1 << 6; 
-         attmsk[wK]              = 1 << 6; 
-         attmsk[bK]              = 1 << 6; 
-   
-         for (to = 0; to < 64; ++to) { 
-                 for (from = 0; from < 64; ++from) { 
-                         m = 0; 
-                         rook   = Reach [ROOK]   [from];  
-                         bishop = Reach [BISHOP] [from];  
-                         queen  = Reach [QUEEN]  [from];  
-                         knight = Reach [KNIGHT] [from]; 
-                         king   = Reach [KING]   [from];  
-   
-                         if (BB_ISBITON (knight, to)) { 
-                                 m |= attmsk[wN]; 
-                         } 
-                         if (BB_ISBITON (king, to)) { 
-                                 m |= attmsk[wK]; 
-                         } 
-                         if (BB_ISBITON (rook, to)) { 
-                                 m |= attmsk[wR]; 
-                         } 
-                         if (BB_ISBITON (bishop, to)) { 
-                                 m |= attmsk[wB]; 
-                         }                        
-                         if (BB_ISBITON (queen, to)) { 
-                                 m |= attmsk[wQ]; 
-                         } 
-                          
-                         to88 = mapx88(to); 
-                         fr88 = mapx88(from); 
-                         diff = (int)to88 - (int)fr88; 
-   
-                         if (diff ==  17 || diff ==  15) { 
-                                 m |= attmsk[wP]; 
-                         } 
-                         if (diff == -17 || diff == -15) { 
-                                 m |= attmsk[bP]; 
-                         } 
-   
-                         attmap [to] [from] = (unsigned char) m; 
-                 }                
-         } 
-   
- } 
-   
- bool_t 
- possible_attack(unsigned int from, unsigned int to, unsigned int piece) 
- { 
-   
-         assert (- from  < 64 &&-  to  < 64);
 
-         assert (- reach_was_initialized ());
 
-         assert (- attmsk  [- piece ] != 0 || 0==fprintf(- stderr , "PIECE=%d\n",- piece ) ); /* means piece has been considered */
 
-   
-         return 0 != (attmap [to] [from] & attmsk [piece]); 
- } 
-   
- /* 
- | 
- |       REACH ROUTINES 
- | 
- \*----------------------------------------------*/ 
-   
-   
- enum Key {REACH_INITIALIZED_KEY = 0x1313}; 
- static int reach_initialized_key = 0; 
-   
- bool_t 
- reach_was_initialized (void) 
- { 
-         return  reach_initialized_key == REACH_INITIALIZED_KEY; 
- } 
-   
- void 
- reach_init (void) 
- {        
-         SQUARE buflist[64+1], *list; 
-         SQ_CONTENT pc; 
-         int stp_a [] = {15, -15 }; 
-         int stp_b [] = {17, -17 }; 
-         int STEP_A, STEP_B; 
-         unsigned int side; 
-         unsigned int index; 
-         SQUARE sq, us; 
-   
-         int s; 
-   
-         for (pc = KNIGHT; pc < (KING+1); pc++) { 
-                 for (sq = 0; sq < 64; sq++) { 
-                         uint64_t bb = U64(0x0); 
-                         tolist_rev (U64(0x0), pc, sq, buflist); 
-                         for (list = buflist; *list != NOSQUARE; list++) { 
-                                 bb |= U64(1) << *list; 
-                         } 
-                         Reach [pc] [sq] = bb; 
-                 } 
-         } 
-   
-         for (side = 0; side < 2; side++) { 
-                 index  = 1u ^ side; 
-                 STEP_A = stp_a[side]; 
-                 STEP_B = stp_b[side]; 
-                 for (sq = 0; sq < 64; sq++) { 
-   
-                         int sq88 = (int)map88(sq); 
-                         uint64_t bb = U64(0x0); 
-   
-                         list = buflist; 
-          
-   
-                         s = sq88 + STEP_A; 
-                         if (0 == (s & 0x88)) { 
-                                 us = (SQUARE)unmap88(s); 
-                                 *list++ = us; 
-                         } 
-                         s = sq88 + STEP_B; 
-                         if (0 == (s & 0x88)) { 
-                                 us = (SQUARE)unmap88(s); 
-                                 *list++ = us; 
-                         } 
-                         *list = NOSQUARE; 
-   
-                         for (list = buflist; *list != NOSQUARE; list++) { 
-                                 bb |= U64(1) << *list; 
-                         } 
-                         Reach [index] [sq] = bb; 
-                 } 
-         } 
-         reach_initialized_key = REACH_INITIALIZED_KEY; 
- } 
-   
- /*--------------------------------------------------------------------------------*/ 
-   
- static const int bstep[]  = { 17,  15, -15, -17,  0}; 
- static const int rstep[]  = {  1,  16,  -1, -16,  0}; 
- static const int nstep[]  = { 18,  33,  31,  14, -18, -33, -31, -14,  0}; 
- static const int kstep[]  = {  1,  17,  16,  15,  -1, -17, -16, -15,  0}; 
-           
- static const  
- int *psteparr[] = {NULL, NULL, /* NOPIECE & PAWN */ 
-                    nstep, bstep, rstep, kstep, kstep /* same for Q & K*/ 
-                   }; 
- static const  
- int   pslider[] = {FALSE, FALSE, 
-                    FALSE,  TRUE,  TRUE,  TRUE, FALSE 
-                   }; 
-          
- void  
- tolist_rev (uint64_t occ, SQ_CONTENT input_piece, SQUARE sq, SQUARE *list) 
- /* reversible moves from pieces. Output is a list of squares */ 
- { 
-         int direction; 
-         unsigned int pc; 
-     int s; 
-         int from; 
-         int step; 
-         const int *steparr; 
-         bool_t slider; 
-         SQUARE us; 
-   
-   
-         /* i.e. no pawn allowed as input */ 
-         assert (- input_piece  ==-  KNIGHT  ||-  input_piece  ==-  BISHOP  ||
 
-                         input_piece == ROOK   || input_piece == QUEEN  ||  
-                         input_piece == KING); 
-   
-         from = (int)map88(sq); 
-          
-         pc = input_piece & (PAWN|KNIGHT|BISHOP|ROOK|QUEEN|KING); 
-   
-         steparr = psteparr [pc]; 
-         slider  = pslider  [pc]; 
-   
-         if (slider) { 
-                  
-                 for (direction = 0; steparr[direction] != 0; direction++) { 
-                         step = steparr[direction]; 
-                         s = from + step; 
-                         while (0 == (s & 0x88)) { 
-                                 us = (SQUARE)unmap88(s); 
-                                 if (0 != (0x1u & (unsigned int)(occ >> us))) 
-                                         break; 
-                                 *list++ = us; 
-                                 s += step; 
-                         } 
-                 } 
-   
-         } else { 
-                  
-                 for (direction = 0; steparr[direction] != 0; direction++) { 
-                         step = steparr[direction]; 
-                         s = from + step; 
-                         if (0 == (s & 0x88)) { 
-                                 us = (SQUARE)unmap88(s); 
-                                 if (0 == (0x1u & (unsigned int)(occ >> us))) { 
-                                         *list++ = us; 
-                                 } 
-                         } 
-                 }                
-         } 
-   
-         *list = NOSQUARE; 
-   
-         return; 
- }        
-   
-   
-   
-