Misc/abrash-black-book
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Remove colour attributes from body and strip most of the font tags out

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James Gregory 2013-12-30 13:57:02 +11:00
commit c1f88ddb41
362 changed files with 1632 additions and 1706 deletions
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16-02.html
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@ -24,7 +24,7 @@
<!--CHAPTER=16//-->
<!--PAGES=300-303//-->
<!--UNASSIGNED1//-->
<!--UNASSIGNED2//--></HEAD><BODY LINK=#0000FF ALINK=#000099 VLINK=#0000FF BGCOLOR=#FFFFFF>
<!--UNASSIGNED2//--></HEAD><body>
<CENTER>
<TABLE BORDER>
@ -186,7 +186,7 @@
end
</PRE>
<!-- END CODE //-->
<H4 ALIGN="LEFT"><A NAME="Heading4"></A><FONT COLOR="#000077">Which Way to Go from Here?</FONT></H4>
<H4 ALIGN="LEFT"><A NAME="Heading4"></A>Which Way to Go from Here?</H4>
<P>We could rearrange the tests in light of the nature of the data being scanned; for example, we could perform the tests more efficiently by taking advantage of the knowledge that if a byte is less than &lsquo;0,&rsquo; it&rsquo;s either an apostrophe or not a character at all. However, that sort of fine-tuning is typically good for speedups of only 10 to 20 percent, and I&rsquo;ve intentionally refrained from implementing this in Listing 16.3 to avoid pointing you down the wrong path; what we need is a different tack altogether. Ponder this. What we <I>really</I> want to know is nothing more than whether a byte is a character, not what sort of character it is. For each byte value, we want a yes/no status, and nothing else&mdash;and that description practically begs for a lookup table. Listing 16.4 uses a lookup table approach to boost performance another 50 percent, to three times the performance of the original C code. On a 20 MHz 386, this represents a change from 4.6 to 1.6 seconds, which could be significant&mdash;who likes to wait? On an 8088, the improvement in word-counting a large file could easily be 10 or 20 seconds, which is <I>definitely</I> significant.</P><P><BR></P>
<CENTER>
<TABLE BORDER>
@ -200,7 +200,7 @@
<hr width="90%" size="1" noshade>
<div align="center">
<font face="Verdana,sans-serif" size="1">Graphics Programming Black Book &copy; 2001 Michael Abrash</font>
Graphics Programming Black Book &copy; 2001 Michael Abrash
</div>
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