嘗試限制寬度時使用 bytefield 套件出現算術溢位錯誤

Question

我正在嘗試起草一份文檔，該文檔大量使用了該bytefield包，但遇到了這樣的情況：對於必須為 64 位寬的字段，似乎沒有好的解決方案（即使文檔沒有顯示這樣的示例！）。話不多說，結果如下：

正如您所看到的，64 位元值的寬度超出了頁面範圍。我嘗試使用bitwidth文檔中描述的可選參數來限制它（例如以下這個答案的問題提供 的參數0.8\textwidth，從那裡進行調整，但這樣做會產生“算術溢出”錯誤。有人知道如何限制寬度整個領域本身，或至少強制bytefield生成一個不能比頁面本身更寬的欄位？

這是最小工作範例的程式碼：

\documentclass[10pt]{extreport}
\usepackage[margin=2.0cm,a4paper]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{bytefield}

\begin{document}
    \noindent
    An \texttt{unsigned word} is defined as a 16-bit or two-octet quantity, having the range \texttt{[0, 65535]}: \\

    \begin{center}
        \begin{bytefield}[endianness=big]{16}
            \bitheader{15, 7, 0}                \\
            \bitbox{16}{\texttt{unsigned word}} \\
        \end{bytefield}
    \end{center}

    An \texttt{unsigned word} is addressable as an 2-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the word (the \textit{high byte}) and \texttt{byte[1]} corresponds to the least-significant byte in the word (the \textit{low byte}). \\

    \vspace{5pt}
    \hrule
    \vspace{15pt}

    \noindent
    An \texttt{unsigned doubleword} is defined as a 32-bit or four-octet quantity, having the range \texttt{[0, 4294967295]}: \\

    \begin{center}
        \begin{bytefield}[endianness=big]{32}
            \bitheader{31, 23, 15, 7, 0}                \\
            \bitbox{32}{\texttt{unsigned doubleword}}   \\
        \end{bytefield}
    \end{center}

    An \texttt{unsigned doubleword} is addressable as an 4-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the doubleword (the \textit{high byte}) and \texttt{byte[3]} corresponds to the least-significant byte in the doubleword (the \textit{low byte}). \\

    \vspace{5pt}
    \hrule
    \vspace{15pt}

    \noindent
    An \texttt{unsigned quadword} is defined as a 64-bit or eight-octet quantity, having the range \texttt{[0, 18446744073709551615]}: \\

    \begin{center}
        \begin{bytefield}[endianness=big]{64}
            \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
            \bitbox{64}{\texttt{unsigned quadword}}         \\
        \end{bytefield}
    \end{center}

    An \texttt{unsigned quadword} is addressable as an 8-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the quadword (the \textit{high byte}) and \texttt{byte[7]} corresponds to the least-significant byte in the quadword (the \textit{low byte}). \\
\end{document}

產生錯誤的非工作程式碼如下 - 將其括在大括號中並不能緩解錯誤：

\begin{center}
    \begin{bytefield}[endianness=big, bitwidth=0.8\textwidth]{64}
        \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
        \bitbox{64}{\texttt{unsigned quadword}}         \\
    \end{bytefield}
\end{center}

另外，對明智的人說的話 - 我仍然（慢慢地）掌握 TeX 的訣竅，所以我的自私技能仍然有點局限於“在線尋找解決方案，希望有人已經實現了它”；你可能需要幫我分解潛在的答案。

如果有幫助的話，所討論的環境是 MacTex 2015 (TeXLive-2015)；程式碼是使用 TeXstudio 2.10.4 建構的。

Answer 1

您可以嘗試使用\resizeboxof 套件graphicx。

\documentclass[10pt]{extreport}
\usepackage[margin=2.0cm,a4paper]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{bytefield}
\usepackage{graphicx}
\begin{document}
    \noindent
    An \texttt{unsigned word} is defined as a 16-bit or two-octet quantity, having the range \texttt{[0, 65535]}: \\

    \begin{center}
        \begin{bytefield}[endianness=big]{16}
            \bitheader{15, 7, 0}                \\
            \bitbox{16}{\texttt{unsigned word}} \\
        \end{bytefield}
    \end{center}

    An \texttt{unsigned word} is addressable as an 2-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the word (the \textit{high byte}) and \texttt{byte[1]} corresponds to the least-significant byte in the word (the \textit{low byte}). \\

    \vspace{5pt}
    \hrule
    \vspace{15pt}

    \noindent
    An \texttt{unsigned doubleword} is defined as a 32-bit or four-octet quantity, having the range \texttt{[0, 4294967295]}: \\

    \begin{center}
        \begin{bytefield}[endianness=big]{32}
            \bitheader{31, 23, 15, 7, 0}                \\
            \bitbox{32}{\texttt{unsigned doubleword}}   \\
        \end{bytefield}
    \end{center}

    An \texttt{unsigned doubleword} is addressable as an 4-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the doubleword (the \textit{high byte}) and \texttt{byte[3]} corresponds to the least-significant byte in the doubleword (the \textit{low byte}). \\

    \vspace{5pt}
    \hrule
    \vspace{15pt}

    \noindent
    An \texttt{unsigned quadword} is defined as a 64-bit or eight-octet quantity, having the range \texttt{[0, 18446744073709551615]}: \\

    \begin{center}
        \resizebox{1.0\linewidth}{\height}{\begin{bytefield}[endianness=big]{64}
            \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
            \bitbox{64}{\texttt{unsigned quadword}}         \\
        \end{bytefield}}
    \end{center}

    An \texttt{unsigned quadword} is addressable as an 8-size array of bytes, where \texttt{byte[0]} corresponds to the most-significant byte in the quadword (the \textit{high byte}) and \texttt{byte[7]} corresponds to the least-significant byte in the quadword (the \textit{low byte}). \\
\end{document}

否則，保持相同的大小：

\begin{center}
    \centerline{\begin{bytefield}[endianness=big]{64}
        \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
        \bitbox{64}{\texttt{unsigned quadword}}         \\
    \end{bytefield}}
\end{center}

雖然\centerline不是最好的 LaTeX 指令。 （但這裡很好，因為它是center東西中唯一的東西）。

更新：

由於位元組字段框的深度令人驚訝，因此需要進行一些嘗試和錯誤。另外，我並不完全清楚為什麼我必須稍微縮小寬度以避免垂直移位。

\begin{center}
    \mbox{\resizebox{.9999\linewidth}{\height}{%
          \begin{bytefield}[endianness=big]{64}
              \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
              \bitbox{64}{}         \\
            \end{bytefield}}%
\kern-\linewidth
     \makebox[\linewidth]{\raisebox{4ex}{\texttt{unsigned quadword}}}%
          }
\end{center}

Answer 2

為一位保留的寬度必須乘以位數，因此像這樣的數字

bitwidth=0.015\textwidth

或更少更有可能起作用（選項showframe僅用於範例）：

\documentclass[10pt]{extreport}
\usepackage[margin=2.0cm,a4paper,showframe]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{bytefield}

\begin{document}
An \texttt{unsigned quadword} is defined as a 64-bit or quantity, in the range
\texttt{[0, 18446744073709551615]}:
\begin{center}
\begin{bytefield}[endianness=big,bitwidth=0.015\textwidth]{64}
  \bitheader{63, 55, 47, 39, 31, 23, 15, 7, 0}    \\
  \bitbox{64}{\texttt{unsigned quadword}}         \\
  \end{bytefield}
\end{center}

\end{document}