modelchecker/coord.c

   1 #include <argp.h>
   2 #include <inttypes.h>
   3 #include <locale.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <sys/time.h>
   8
   9 #ifdef HAVE_PROFILER
  10 #include <gperftools/profiler.h>
  11 #endif
  12
  13 #include <sylvan.h>
  14 #include <llmsset.h>
  15 #include <lace.h>
  16
  17 #include "coord.h"
  18 #include "sokoban.h"
  19
  20 /*
  21  * Global TODOs for now:
  22  * - update the helper maps so it is a single bimap
  23  * - make a data structure for relations
  24  * - encode relations as a set of four relations for each move
  25  */
  26
  27 typedef struct {
  28         int x;
  29         int y;
  30 } xy;
  31
  32 typedef struct {
  33         int var[3];
  34 } bddvar;
  35
  36 typedef struct {
  37         xy key;
  38         bddvar value;
  39         UT_hash_handle hh;
  40 } xy_bddvar_map;
  41
  42 typedef struct {
  43         int key;
  44         xy value;
  45         UT_hash_handle hh;
  46 } bddvar_xy_map;
  47
  48 typedef struct {
  49         xy_bddvar_map f;
  50         bddvar_xy_map t;
  51 } bimap;
  52
  53 xy_bddvar_map *getxy(int x, int y, xy_bddvar_map *map)
  54 {
  55         xy_bddvar_map k, *r = NULL;
  56         memset(&k, 0, sizeof(xy_bddvar_map));
  57         k.key.x = x;
  58         k.key.y = y;
  59         HASH_FIND(hh, map, &k.key, sizeof(xy), r);
  60         return r;
  61 }
  62
  63 bddvar_xy_map *getbdd(int key, bddvar_xy_map *map)
  64 {
  65         bddvar_xy_map k, *r = NULL;
  66         memset(&k, 0, sizeof(bddvar_xy_map));
  67         k.key = key;
  68         HASH_FIND(hh, map, &k.key, sizeof(int), r);
  69         return r;
  70 }
  71
  72 xy_bddvar_map *create_xy_bddvar_map(sokoban_screen *screen)
  73 {
  74         int varcount = 0;
  75         sokoban_screen *r;
  76         xy_bddvar_map *xybdd = NULL;
  77         for(r=screen; r != NULL; r = (sokoban_screen *)(r->hh.next)){
  78                 xy_bddvar_map *f = NULL;
  79                 //bddvar_xy_map *t = NULL;
  80
  81                 f = (xy_bddvar_map *)malloc(sizeof(xy_bddvar_map));
  82                 memset(f, 0, sizeof(xy_bddvar_map));
  83                 f->key.x = r->coord.x;
  84                 f->key.y = r->coord.y;
  85                 printf("test!: %d %d\n", r->coord.x, r->coord.y);
  86                 f->value.var[0] = varcount;
  87                 f->value.var[1] = varcount + 1;
  88                 f->value.var[2] = varcount + 2;
  89                 HASH_ADD(hh, xybdd, key, sizeof(xy), f);
  90                 varcount = varcount + 3;
  91         }
  92         return xybdd;
  93 }
  94
  95 bddvar_xy_map *create_bddvar_xy_map(sokoban_screen *screen)
  96 {
  97         int varcount = 0;
  98         sokoban_screen *r;
  99         bddvar_xy_map *bddxy = NULL;
 100         for(r=screen; r != NULL; r = (sokoban_screen *)(r->hh.next)){
 101                 for (int i = 0; i <3; i++){
 102                         bddvar_xy_map *f = NULL;
 103                         //bddvar_xy_map *t = NULL;
 104
 105                         f = (bddvar_xy_map *)malloc(sizeof(bddvar_xy_map));
 106                         memset(f, 0, sizeof(bddvar_xy_map));
 107                         f->key = varcount + i;
 108                         f->value.x = r->coord.x;
 109                         f->value.y = r->coord.y;
 110                         HASH_ADD(hh, bddxy, key, sizeof(int), f);
 111                 }
 112                 varcount = varcount + 3;
 113         }
 114         return bddxy;
 115 }
 116
 117 /*
 118  * Each coordinate has three related boolean variables. The combination of those boolean variables
 119  * defines tiles:
 120  * 000: Wall
 121  * 001: Free
 122  * 010: Box
 123  * 100: Box on target
 124  * 011: Target
 125  * 101: Agent
 126  * 110: Agent on target
 127  * In the BDD representation, the state is represented by n * 3 variables, where n is the number of
 128  * tiles in the shrinked screen.
 129  * It seems that the move variable is not necessary since non-deterministic moves can be emvedded
 130  * directly in transition relations.
 131  */
 132
 133 BDD encode_screen(sokoban_screen *screen)
 134 {
 135         BDD state = sylvan_false;
 136         int tile_index = 0;
 137         sokoban_screen *r;
 138         LACE_ME;
 139         for(r=screen; r != NULL; r = (sokoban_screen *)(r->hh.next)){
 140                 switch(r->tile){
 141                 case FREE:
 142                         if (state == sylvan_false){
 143                                 state = sylvan_not(sylvan_ithvar(tile_index));
 144                                 tile_index++;
 145                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 146                                 tile_index++;
 147                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 148                                 tile_index++;
 149                         }
 150                         else {
 151                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 152                                 tile_index++;
 153                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 154                                 tile_index++;
 155                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 156                                 tile_index++;
 157                         }
 158                         break;
 159                 case WALL:
 160                         if (state == sylvan_false){
 161                                 state = sylvan_not(sylvan_ithvar(tile_index));
 162                                 tile_index++;
 163                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 164                                 tile_index++;
 165                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 166                                 tile_index++;
 167                         }
 168                         else {
 169                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 170                                 tile_index++;
 171                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 172                                 tile_index++;
 173                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 174                                 tile_index++;
 175                         }
 176                         break;
 177                 case BOX:
 178                         if (state == sylvan_false){
 179                                 state = sylvan_not(sylvan_ithvar(tile_index));
 180                                 tile_index++;
 181                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 182                                 tile_index++;
 183                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 184                                 tile_index++;
 185                         }
 186                         else {
 187                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 188                                 tile_index++;
 189                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 190                                 tile_index++;
 191                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 192                                 tile_index++;
 193                         }
 194                         break;
 195                 case TARGET:
 196                         if (state == sylvan_false){
 197                                 state = sylvan_not(sylvan_ithvar(tile_index));
 198                                 tile_index++;
 199                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 200                                 tile_index++;
 201                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 202                                 tile_index++;
 203                         }
 204                         else {
 205                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 206                                 tile_index++;
 207                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 208                                 tile_index++;
 209                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 210                                 tile_index++;
 211                         }
 212                         break;
 213                 case AGENT:
 214                         if (state == sylvan_false){
 215                                 state = sylvan_ithvar(tile_index);
 216                                 tile_index++;
 217                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 218                                 tile_index++;
 219                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 220                                 tile_index++;
 221                         }
 222                         else {
 223                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 224                                 tile_index++;
 225                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 226                                 tile_index++;
 227                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 228                                 tile_index++;
 229                         }
 230                         break;
 231                 case TARGAGENT:
 232                         if (state == sylvan_false){
 233                                 state = sylvan_ithvar(tile_index);
 234                                 tile_index++;
 235                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 236                                 tile_index++;
 237                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 238                                 tile_index++;
 239                         }
 240                         else {
 241                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 242                                 tile_index++;
 243                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 244                                 tile_index++;
 245                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 246                                 tile_index++;
 247                         }
 248                         break;
 249                 case TARGBOX:
 250                         if (state == sylvan_false){
 251                                 state = sylvan_ithvar(tile_index);
 252                                 tile_index++;
 253                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 254                                 tile_index++;
 255                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 256                                 tile_index++;
 257                         }
 258                         else {
 259                                 state = sylvan_and(state, sylvan_ithvar(tile_index));
 260                                 tile_index++;
 261                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 262                                 tile_index++;
 263                                 state = sylvan_and(state, sylvan_not(sylvan_ithvar(tile_index)));
 264                                 tile_index++;
 265                         }
 266                         break;
 267                 }
 268         }
 269         /*
 270         xy_bddvar_map *map = NULL;
 271         map = create_xy_bddvar_map(screen);
 272         xy_bddvar_map *m = getxy(1, 1, map);
 273         bddvar_xy_map *map2 = NULL;
 274         map2 = create_bddvar_xy_map(screen);
 275         bddvar_xy_map *m2 = getbdd(2, map2);
 276         printf("Test1: %d %d\n", m->value.var[0], m->value.var[1]);
 277         printf("Test2: %d %d\n", m2->value.x, m2->value.y);
 278         */
 279         printf("%d tiles were encoded\n", tile_index);
 280         return state;
 281 }
 282
 283 BDD encode_rel(sokoban_screen *screen)
 284 {
 285         int num_tiles;
 286         num_tiles = HASH_COUNT(screen);
 287         printf("Number of tiles: %d\n", num_tiles);
 288         return sylvan_true;
 289 }
 290
 291 void test()
 292 {
 293
 294         printf("Test!\n");
 295         BDD a = sylvan_true;
 296         BDD b = sylvan_not(a);
 297         if (b == sylvan_false){
 298                 printf("BDD works!\n");
 299         } else {
 300                 printf("BDD does not work!\n");
 301         }
 302         LACE_ME;
 303         BDD c = sylvan_ithvar(1);
 304         if (sylvan_high(c) == sylvan_true && sylvan_low(c) == sylvan_false) printf("VAR works 1\n");
 305         if (sylvan_var(c) == 1) printf("Var works 2\n");
 306 }