src/comerr/et_name.c

   1 /*
   2  * Copyright 1987 by MIT Student Information Processing Board
   3  *
   4  * For copyright info, see mit-sipb-cr.h.
   5  */
   6
   7 #include <afsconfig.h>
   8 #include <afs/param.h>
   9
  10 #include <roken.h>
  11
  12 #include <afs/opr.h>
  13
  14 #include "error_table.h"
  15 #include "mit-sipb-cr.h"
  16 #include "internal.h"
  17
  18 static const char char_set[] =
  19     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
  20
  21 static char buf[6];
  22
  23 const char *
  24 afs_error_table_name(int num)
  25 {
  26     int ch;
  27     int i;
  28     char *p;
  29
  30     /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
  31     p = buf;
  32     num >>= ERRCODE_RANGE;
  33     /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
  34     num &= 077777777;
  35     /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
  36     for (i = 4; i >= 0; i--) {
  37         ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
  38         if (ch != 0)
  39             *p++ = char_set[ch - 1];
  40     }
  41     *p = '\0';
  42     return (lcstring(buf, buf, sizeof(buf)));
  43 }