unicodedomino_compat.def

% -*- mode: tex -*-
%-
% See unicodedomino.sty for copyright and licence terms. Furthermore
% this file is dual-licenced under the LPPL version 1.3c or later.
%-
% Compatibility code with older utf8.def versions

% added in release 2015/01/01
\ifx\textsubscript\@undefined%
 \RequirePackage{fixltx2e}%
\fi%

% added in v1.1o 2015/08/28
\ifx\UTFviii@hexnumber\@undefined%
 % taken from utf8ienc.dtx, no claim on the code but it’s really trivial
 \gdef\UTFviii@hexnumber#1{%
  \ifnum#1>15 %
   \expandafter\UTFviii@hexnumber\expandafter{\the\numexpr(#1-8)/16\relax}%
  \fi%
  \UTFviii@hexdigit{\numexpr#1\ifnum#1>0-((#1-8)/16)*16\fi\relax}%
 }%
 \gdef\UTFviii@hexdigit#1{%
  \ifcase\numexpr#1\relax%
   0\or1\or2\or3\or4\or5\or6\or7\or8\or9\or%
   A\or B\or C\or D\or E\or F%
  \fi%
 }%
\fi%

% added in v1.2a 2018/03/24
\ifx\UTFviii@invalid@help\@undefined%
 \def\UTFviii@invalid@help{%
  Do ensure the source document is saved in UTF-8 encoding%
 }%
\fi%

% added in v1.2e 2018/09/28
\ifx\UTFviii@hexcodepoint\@undefined%
 % monkey-patch bugfixes
 \input{unicodedomino_kernel_fixup_f4.def}%
 % override message to format the codepoint correctly
 \gdef\UTFviii@splitcsname#1:#2\relax{%
  #2 (\expandafter\UTFviii@hexcodepoint\expandafter{%
   \the\numexpr\decode@UTFviii#2\relax})%
 }%
\fi%

% added in v1.2f 2018/10/05
% unfortunately there’s no \@ifpackagelater equivalent for utf8.def,
% especially considering it’s part of the fmt file nowadays, so we
% check for the next added macro (after v1.2h) :/
\ifx\UTFviii@two@octets@combine\@undefined%
 % override message to give the byte in hex
 \def\UTFviii@invalid@err#1{%
  \PackageError{inputenc}{Invalid UTF-8 byte "\UTFviii@hexnumber{`#1}}%
   \UTFviii@invalid@help%
 }%
\fi%