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FUNNELWEB MANUAL WEB PAGE
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Copyright (c) Ross N. Williams 1992,1999. All rights reserved.
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Permission is granted to redistribute and use this manual in
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<TITLE>5.13 TABs</TITLE>
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<A HREF="intro.html"><FONT COLOR="#FFFFFF">1 Introduction</FONT></A><BR>
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<A HREF="hints.html"><FONT COLOR="#FFFFFF">5 Hints</FONT></A><BR>
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<P><FONT SIZE="5">5.13 TABs</FONT><BR>
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<P>FunnelWeb is designed to protect its user from spurious
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non-printable characters that might creep into a source file,
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and so it classifies any occurrence of such a character as
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<P>FunnelWeb's idea of printable is any character in the
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range ASCII [32..126]. A number of people have complained
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about this, saying that they want to include 8-bit
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characters in their FunnelWeb input files. Currently there
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is no fix for this except to insert characters explicitly
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into the output using a <SAMP>@^</SAMP> sequence (see the
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<A HREF="../reference/index.html"
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TARGET="funnelwebreference"
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onClick="window.open('','funnelwebreference','location,status,menubar,scrollbars,resizable',false).focus(); return true;"
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>FunnelWeb Reference Manual</A> for more details).
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<P>In particular, FunnelWeb flags TAB characters in its
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input file as errors because TABs are essentially invisible
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control characters with very poorly-defined semantics; it's
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FunnelWeb's job to keep an eye on the input file to ensure
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that the programmer doesn't get any nasty surprises and as
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TABs can cause several kinds of surprises, they are excluded.
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<P>A lot of people have complained about this aspect of
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FunnelWeb. Unfortunately, this issue has not yet been
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resolved. If you actually <I>need</I> TABs in the output
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file (e.g. for a makefile), then you should insert TABs
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explicitly using a <SAMP>@^D(009)</SAMP> sequence (see the
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<A HREF="../reference/index.html"
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TARGET="funnelwebreference"
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onClick="window.open('','funnelwebreference','location,status,menubar,scrollbars,resizable',false).focus(); return true;"
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>FunnelWeb Reference Manual</A> for more details).
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<P>The following C program removes TABs. The program was
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kindly donated by John Skaller. Warning: This program
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doesn't have any error checking.
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/* Author : John Skaller (maxtal@extro.ucc.su.oz.au) */
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/* Organization : MAXTAL P/L 6 Mackay St ASHFIELD 2131. */
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/* Usage : untab 2 <infile >outfile */
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/* Status : Public domain. */
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int main(int argv, char **argc)
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if(argv==2)sscanf(argc[1],"%d",&n);
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if(ch=='\n'){putchar('\n'); column=0;}
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putchar(' '); column++;
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while(column % n){putchar(' '); column++;}
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else { putchar(ch); column++;}
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<A HREF="copyright.html">Copyright © Ross N. Williams 1992,1999. All rights reserved.</A><BR>
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