/*

 * Copyright 1987 by MIT Student Information Processing Board

 *

 * Permission to use, copy, modify, and distribute this software and

 * its documentation for any purpose is hereby granted, provided that

 * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in

 * advertising or publicity pertaining to distribution of the software

 * without specific, written prior permission.  M.I.T. and the

 * M.I.T. S.I.P.B. make no representations about the suitability of

 * this software for any purpose.  It is provided "as is" without

 * express or implied warranty.

 */

#include "config.h"

#include "com_err.h"

#include "error_table.h"

#include "internal.h"

static const char char_set[] =

  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";

static char buf[6];

const char * error_table_name(errcode_t num)

{

    int ch;

    int i;

    char *p;

    /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */

    p = buf;

    num >>= ERRCODE_RANGE;

    /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */

    num &= 077777777L;

    /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */

    for (i = 4; i >= 0; i--) {

  ch = (int)((num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1));

  if (ch != 0)

      *p++ = char_set[ch-1];

    }

    *p = '\0';

    return(buf);

}