Skip to content

Read number lines in a file - in LaTeX

Probably a rare needed feature, but i had to count the number lines in a text file - in LaTeX.

Counting the line numbers is done by using a counter (what else, eh?) and readling the file line by line:

\documentclass{book}

\usepackage{ifthen}

\newcounter{FileLines}
\newboolean{RestFile}
\newcommand{\FileLine}{}
\newread\File

\newcommand{\CountLinesInFile}[2]
{
  \setboolean{RestFile}{true}
  \setcounter{FileLines}{0}

  \openin\File=#1
  \whiledo{\boolean{RestFile}}
  {
    \ReadNextLine{\File}
    \ifthenelse{\boolean{RestFile}}{
      \stepcounter{FileLines}
    }{}
  }
  \closein\File
}

\newcommand{\ReadNextLine}[1]{
  \ifthenelse{\boolean{RestFile}}{
    \read#1 to \FileLine
    \ifeof#1\setboolean{RestFile}{false
}
    \else % if last line already is read, EOF appears here
    \fi
  }{}
}

\begin{document}

\CountLinesInFile{textfile.txt}

Lines in file: \arabic{FileLines}

\end{document
}

\File is a TeX file descriptor. Note that TeX has a very limited number of this file descriptors, but fortunately they can be re-used, as long as the descriptor is not used in parallel by different commands for a different operation.

The number of file lines is available in the \FileLines counter, which can be exported in arabic numerals by using \arabic{}.

More possible counter representations are explained in my previous post.

  • Twitter
  • Bookmark Read number lines in a file - in LaTeX at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Read number lines in a file - in LaTeX
  • Bloglines Read number lines in a file - in LaTeX
  • Technorati Read number lines in a file - in LaTeX
  • Fark this: Read number lines in a file - in LaTeX
  • Bookmark Read number lines in a file - in LaTeX at YahooMyWeb
  • Bookmark Read number lines in a file - in LaTeX at Furl.net
  • Bookmark Read number lines in a file - in LaTeX at reddit.com
  • Bookmark Read number lines in a file - in LaTeX at blinklist.com
  • Bookmark Read number lines in a file - in LaTeX at Spurl.net
  • Bookmark Read number lines in a file - in LaTeX at Simpy.com
  • Bookmark Read number lines in a file - in LaTeX at blogmarks
  • Bookmark Read number lines in a file - in LaTeX with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca

Trackbacks

No Trackbacks

Comments

Display comments as Linear | Threaded

Jonas Winkler on :

Thanks for sharing, exactly what I was looking for. Works like a charm :)
Comments ()

Add Comment

Enclosing asterisks marks text as bold (*word*), underscore are made via _word_.
E-Mail addresses will not be displayed and will only be used for E-Mail notifications.
To leave a comment you must approve it via e-mail, which will be sent to your address after submission.
Form options