tree a115746e618ed9af41a026aa18a09cb87676bba3
parent 5548c36eb8024138874610a6f71079640bf77ad9
author Janne Grunau <j@jannau.net> 1710625820 +0100
committer Heinrich Schuchardt <heinrich.schuchardt@canonical.com> 1711000573 +0100

lib/charset: Map Unicode code points to CP437 code points 1-31

Code page 437 uses code points 1-31 for glyphs instead of control
characters. Map the appropriate Unicode code points to this code points.
Fixes rendering of grub2's menu as EFI application using the
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL on a console with bitmap fonts.

Signed-off-by: Janne Grunau <j@jannau.net>