move.c

   1 #include <ctype.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "board.h"
   7 #include "move.h"
   8
   9
  10 /* The S_OFFBOARD margin is not addressable by coordinates. */
  11
  12 static char asdf[] = "abcdefghjklmnopqrstuvwxyz";
  13
  14 char *
  15 coord2str(coord_t c, struct board *board)
  16 {
  17         return strdup(coord2sstr(c, board));
  18 }
  19
  20 char *
  21 coord2sstr(coord_t c, struct board *board)
  22 {
  23         static char b[4];
  24         if (is_pass(c)) {
  25                 return "pass";
  26         } else if (is_resign(c)) {
  27                 return "resign";
  28         } else {
  29                 /* Some GTP servers are broken and won't grok lowercase coords */
  30                 snprintf(b, 4, "%c%d", toupper(asdf[coord_x(c, board) - 1]), coord_y(c, board));
  31                 return b;
  32         }
  33 }
  34
  35 /* No sanity checking */
  36 coord_t *
  37 str2coord(char *str, int size)
  38 {
  39         if (!strcasecmp(str, "pass")) {
  40                 return coord_pass();
  41         } else if (!strcasecmp(str, "resign")) {
  42                 return coord_resign();
  43         } else {
  44                 char xc = tolower(str[0]);
  45                 return coord_init(xc - 'a' - (xc > 'i') + 1, atoi(str + 1), size);
  46         }
  47 }