在 xelatex 中產生隨機 uuid

Question

有沒有簡單的方法可以使用套件或簡單的 LaTeX 腳本在 XeLaTeX 中產生唯一識別碼（例如隨機 uuid），不需要任何外部命令來執行？

Answer 1

由於 XeTeX 目前沒有原生隨機數支持，我們需要random.tex；也binhex.tex有幫助。

\documentclass{article}

\input{random}
\input{binhex}

\makeatletter
\newcount\temp@uuid
\newcommand{\makeUUID}[1]{%
  \@ifdefinable{#1}{\make@UUID{#1}}%
}
\newcommand{\make@UUID}[1]{%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{\nhex{4}{\temp@uuid}}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}-}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}-}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}-}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}-}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}}%
  \setrannum{\temp@uuid}{0}{"10000}%
  \edef#1{#1\nhex{4}{\temp@uuid}}%
  % remove the following three lines if you're happy with uppercase hex digits
  \lowercase\expandafter{%
    \expandafter\def\expandafter#1\expandafter{#1}%
  }%
}
\makeatother

\makeUUID\foo
\makeUUID\baz

\begin{document}

\ttfamily

\foo

\baz

\end{document}