38 lines
785 B
C
38 lines
785 B
C
/*
|
|
* Copyright 1987 by MIT Student Information Processing Board
|
|
*
|
|
* For copyright info, see mit-sipb-copyright.h.
|
|
*/
|
|
|
|
#include "error_table.h"
|
|
#include "mit-sipb-copyright.h"
|
|
#include "internal.h"
|
|
|
|
static const char char_set[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
|
|
|
|
static char buf[6];
|
|
|
|
const char *
|
|
error_table_name(num)
|
|
int 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 &= 077777777;
|
|
/* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
|
|
for (i = 4; i >= 0; i--) {
|
|
ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
|
|
if (ch != 0)
|
|
*p++ = char_set[ch - 1];
|
|
}
|
|
*p = '\0';
|
|
return (buf);
|
|
}
|