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<title>Colorized expand.sed</title></head>
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<font color="#00ffff"><b>#!/bin/sed -f</b></font>
<font color="#00ffff"><b># @(#)14apr89/31aug01 expand.sed by Greg Ubben</b></font>
<font color="#ff6060"><b>/</b></font><font color="#8080ff"><b> </b></font><font color="#ff6060"><b>/</b></font> <font color="#ff6060"><b>!</b></font><font color="#ffff00"><b>b</b></font>
<font color="#00ffff"><b># Change the text before a tab to</b></font>
<font color="#00ffff"><b># text<MARKER>text<TAB><8 blanks><TAB></b></font>
<font color="#00ffff"><b>#</b></font>
<font color="#ffff00"><b>s</b></font><font color="#ff6060"><b>/</b></font><font color="#8080ff"><b>\<font color="#ff00ff"><b>(</b></font>[^ ]*\) </b></font><font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>\1</b></font><font color="#00ff00"><b>&</b></font> <font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>g</b></font>
<font color="#00ffff"><b># Reduce the text between the marker and the tab to less</b></font>
<font color="#00ffff"><b># than eight characters. We have to put in 8-(length MOD 8)</b></font>
<font color="#00ffff"><b># blanks, and this effectively does the modulo operation.</b></font>
<font color="#ff00ff"><b>:</b></font><font color="#ff00ff"><b><a name="a">a</a></b></font>
<font color="#ffff00"><b>s</b></font><font color="#ff6060"><b>/</b></font><font color="#8080ff"><b>[^ ]\{8\}</b></font><font color="#ff6060"><b>/</b></font>\a<font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>g</b></font>
<font color="#ffff00"><b>t</b></font> <a href="#a">a</a>
<font color="#00ffff"><b># The buffer is now:</b></font>
<font color="#00ffff"><b># text<MARKER><(length MOD 8) characters><TAB><expansion><extra blanks><TAB></b></font>
<font color="#00ffff"><b># `-----------------------------------------'</b></font>
<font color="#00ffff"><b># Notice that the expansion is 8-(length MOD 8), so the </b></font>
<font color="#00ffff"><b># underlined part is exactly nine characters. That's how</b></font>
<font color="#00ffff"><b># we discard the extra blanks and the tabs.</b></font>
<font color="#00ffff"><b># </b></font>
<font color="#ffff00"><b>s</b></font><font color="#ff6060"><b>/</b></font><font color="#8080ff"><b>\<font color="#ff00ff"><b>(</b></font>.\{9\}\) * </b></font><font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>\1</b></font><font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>g</b></font>
<font color="#00ffff"><b># We have now:</b></font>
<font color="#00ffff"><b># text<MARKER><(length MOD 8) characters><TAB><expansion></b></font>
<font color="#00ffff"><b>#</b></font>
<font color="#00ffff"><b># so we discard everything between the marker and the tab</b></font>
<font color="#00ffff"><b>#</b></font>
<font color="#ffff00"><b>s</b></font><font color="#ff6060"><b>/</b></font><font color="#8080ff"><b>[^ ]* </b></font><font color="#ff6060"><b>/</b></font><font color="#ff6060"><b>/</b></font><font color="#00ff00"><b>g</b></font>
<font color="#00ffff"><b>### colorized by <a href="https://aurelio.net/projects/sedsed/">sedsed</a>, a debugger and code formatter for sed scripts</b></font>
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