GitLab

(FETCH_MULTIBYTE_CHAR): Don't use _fetch_multibyte_char_len.
(BUF_FETCH_MULTIBYTE_CHAR): Likewise.
(FETCH_CHAR_AS_MULTIBYTE): New macro.

the case conversion change the byte length.
(casify_region): Likewise

within map-char-table.

different scripts constituting a work.

name doesn't ends with "-fontset-*", use family name as the first
part of the plain name.
(create-fontset-from-ascii-font): If "fontset-startup" is not yet
created, use that name for the fontset.  Fix arguments to
subst-char-in-string.

finding non-empty buffer, make it unibyte.

non-empty buffer, make it unibyte.

case.

charset.
("Ukrainian"): New.

Extern deleted.

SINGLE_BYTE_CHAR_P.  Fix the logic of handling non-ASCII char when
it->multibyte_p is zero.

(Funibyte_charset): Renamed from Fprimary_charset.
(Fset_unibyte_charset): Renamed from Fset_primary_charset.
(syms_of_charset): Adjusted for the above changes.

charset_primary.

charset_unibyte, not charset_primary.
(multibyte_char_to_unibyte): Likewise.
(Funibyte_char_to_multibyte): Likewise.

(fontset_id_valid_p): Define it if FONTSET_DEBUG is defined.

set nonascii-translation-table and nonascii-insert-offset.  Call
set-unibyte-charset, not set-primary-charset.
(nonascii-translation-table, nonascii-insert-offset): Declare
these variable as obsolete ones.
(set-language-environment): Call set-unibyte-charset, not
set-primary-charset.  Call set-charset-priority with `charset'
info of the language environment.

for a coding system of type iso-2022.

treat katakana following han characters as a part of a word.