zopen VIM , statuline=%B displays ASCII as opposed to be EBCDIC

[runningppl]

How to reproduce:

1)
echo "ABCDE12345" > a.txt

2)
# Confirm the chars are ebcdic
> xxd a.txt |head -1
00000000: c1c2 c3c4 c5f1 f2f3 f4f5 15              ...........

3)
chtag -t -c IBM-1047 a.txt

4) 
vim a.txt

5)
:set statusline=%B


6) Browse through the characters and it displays ASCII values(BAD) as opposed to be EBCDIC(GOOD)
Refer to [screen cap]

[IgorTodorovskiIBM]

This is the relevant code:

  4943   case STL_BYTEVAL:
  4944       num = byteval;
  4945       if (num == NL)
  4946     num = 0;
  4947       else if (num == CAR && get_fileformat(wp->w_buffer) == EOL_MAC)
  4948     num = NL;
  4949       break;

We have two options:

• Detect the original file codepage and convert byteval to it
• Since our Vim always operates in ASCII/UTF8, Introduce a new statusline option, %BE? To convert to EBCDIC or %B0 to convert to original codepage