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/*
* Copyright 1987 by MIT Student Information Processing Board
* For copyright info, see Copyright.SIPB.
*
* $Id: et_name.c,v 1.2 1994/07/19 19:21:27 g89r4222 Exp $
*/
#include "error_table.h"
static char copyright[] = "Copyright 1987 by MIT Student Information Processing Board";
char *malloc();
char *
error_table_name(num)
int num;
{
register int ch;
register int i;
register char *buf, *p;
/* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
buf = malloc(5);
p = buf;
num >>= ERRCODE_RANGE;
/* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
num &= 077777777;
/* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
for (i = 0; i < 5; i++) {
ch = (num >> 24-6*i) & 077;
if (ch == 0)
continue;
else if (ch < 27)
*p++ = ch - 1 + 'A';
else if (ch < 53)
*p++ = ch - 27 + 'a';
else if (ch < 63)
*p++ = ch - 53 + '0';
else /* ch == 63 */
*p++ = '_';
}
return(buf);
}
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