Module charset 

Character-set designation and locking-shift sequences.

Category

This module emits SCS (ESC plus a G-set selector and charset designator) and the locking-shift controls that map G1/G2/G3 into GL or GR.

Escape format

SCS is a short 7-bit ESC sequence rather than CSI/OSC/DCS:

ESC ( B
─┬─ ┬ ┬
intro G0 charset

The caller supplies the G-set selector byte and charset identifier exactly as they should appear on the wire.

Mode interaction

Charset selection affects how subsequent bytes are rendered by terminals that honor ISO-2022 character sets. It is independent of DECSET/DECRST modes.

Constants

LS2

Lock G2 into GL: exact bytes ESC n.

LS3

Lock G3 into GL: exact bytes ESC o.

LS1R

Lock G1 into GR: exact bytes ESC ~.

LS2R

Lock G2 into GR: exact bytes ESC }.

LS3R

Lock G3 into GR: exact bytes ESC |.

Functions

write_select_charset

Designate a character set with ESC <gset> <charset>.