#include "config.h"

#include "tool-util.h"
#include "shmem.h"
#include "data.h"

char
team_to_letter(t)
  int t;
{
  switch (t)
  {
   case FED:
    return 'F';
   case ROM:
    return 'R';
   case KLI:
    return 'K';
   case ORI:
    return 'O';
   default:
    return 'I';
  }
}

int
letter_to_team(ch)
  char ch;
{
  switch (ch)
  {
   case 'I':
   case 'i':
    return 0;
   case 'F':
   case 'f':
    return FED;
   case 'R':
   case 'r':
    return ROM;
   case 'K':
   case 'k':
    return KLI;
   case 'O':
   case 'o':
    return ORI;
   default:
    return -1;
  }
}

int
letter_to_pnum(ch)
  char ch;
{
  switch (ch)
  {
   case '0':
   case '1':
   case '2':
   case '3':
   case '4':
   case '5':
   case '6':
   case '7':
   case '8':
   case '9':
    return ch - '0';

   case 'a':
   case 'b':
   case 'c':
   case 'd':
   case 'e':
   case 'f':
   case 'g':
   case 'h':
   case 'i':
   case 'j':
   case 'k':
   case 'l':
   case 'm':
   case 'n':
   case 'o':
   case 'p':
   case 'q':
   case 'r':
   case 's':
   case 't':
   case 'u':
   case 'v':
   case 'w':
   case 'x':
   case 'y':
   case 'z':
    return ch - 'a' + 10;
   default:
    return -1;
  }
}

char
pnum_to_letter(ch)
  int ch;
{
  switch (ch)
  {
   case 0:
   case 1:
   case 2:
   case 3:
   case 4:
   case 5:
   case 6:
   case 7:
   case 8:
   case 9:
    return ch + '0';
   default:
    return ch - 10 + 'a';
  }
}


char *
twoletters(pl)
  struct player *pl;
/* calculate the two letters that form the players designation (e.g. R4) */
{
#define RINGSIZE MAXPLAYER+3
  static char buf[RINGSIZE][3];	/* ring of buffers so that this */
  static int idx;		/* proc can be called several times before
				 * the results are used */
  if (idx >= RINGSIZE)
    idx = 0;
  buf[idx][0] = teams[pl->p_team].letter;
  buf[idx][1] = shipnos[pl->p_no];
  buf[idx][2] = 0;
  return buf[idx++];
}