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  70                   <h2 itemprop="name" class="asset-name entry-title">Improving fix_copyright.pl</h2>
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  73                       <li class="asset-meta-list-item">Posted on <time datetime="2004-12-20T17:55:11-08:00" itemprop="datePublished">December 20, 2004</time></li>
  74                       <li class="asset-meta-list-item">by <span class="author entry-author vcard"></span></li>
  75
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  77                       <li class="asset-meta-list-item">in <a itemprop="articleSection" rel="tag" href="http://defaria.com/blogs/Status/lynuxworks/">LynuxWorks</a></li>
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  84                   <ul>
  85
  86 <li>Still unable to build 3.2.2/5.0.0 natively</li>
  87
  88 <li>Worked on improving algorithm for copyright replacement</li>
  89
  90 </ul>
  91                   <p>I'm finding it very difficult to develop a hueristic algorithm to find what I call "LynuxWorks copyright blocks" in existing source files. The problem is that the input data is not necessarily consistant. Sure we can go for the 80% fix and hand fix the rest (in fact, that's what I did before) however those 20% often cause compiler errors during the build. What's potential worse is that it is possible that some files will be altered in such a way as to not produce a compiler error but rather to change behavior of the resulting code.</p>
  92
  93 <p>My current algorithm attempts to do the following:</p>
  94
  95 <ul>
  96   <li>Locate the start of a C comment (i.e. "/*"). This comment must be at the beginning of the line (for now I am not considering inline comments as the chances of these containing a bona fide copyright statement is unlikely).</il>
  97
  98   <li>Scan until the enclosing end comment (i.e. "*/"). Again this must appear at the end of a line ($).</li>
  99
 100   <li>Take those lines and examine them for the works "(C) Copyright" and "LynuxWorks" (additionally I found some files that had "LynuxWork,").</li>
 101
 102   <li>If found then the comment block it throw out (to be replaced by the new, more consistent copyright block.</li>
 103
 104 </ul>
 105
 106 <p>Currently the "official" copyright block is of the form:</p>
 107
 108 <div class="code">
 109 <pre>
 110     /* vi: ts=4 sw=4
 111     *************************************************************
 112     (C) Copyright $copy
 113     LynuxWorks, Inc.
 114     San Jose, CA
 115     All rights reserved.
 116
 117     $Date: $Date$
 118     $Revision: $Revision$
 119     $Source: $Source$
 120     ************************************************************/
 121 </pre>
 122 </div>
 123
 124 <p>The "$copy" is replaced by the copyright date found in the file. Dates of the form <year> are changed to <year>-<current year> (unless <year> == <current year>. Dates of the form <year1>, <year2>, <year3> are changed to <year1>-<curernt year>. In order to make finding such copyright information eaiser in the future I would suggest changing the above format to:</p>
 125
 126 <div class="code">
 127 <pre>
 128     /* Start Copyright ******************************************
 129     vi: ts=4 sw=4
 130     (C) Copyright $copy LynuxWorks, Inc.
 131     San Jose, CA
 132     All rights reserved.
 133
 134     $Date: $Date$
 135     $Revision: $Revision$
 136     $Source: $Source$
 137     * End Copyright *********************************************/
 138 </pre>
 139 </div>
 140
 141 <p>This would 1) retain the "vi: ts=4 sw=4" annotation that I assume is for vi users, 2) group both the copyright string ("(C) Copyright") along with the company name of LynuxWorks on the same line. This makes it easier to grep for in the future considering some files have Rockwell copyrights. 3) Clearly delineates the start and stop of the copyright block.</p>
 142
 143 <p>The problems that I'm having is that I'm seeing copyright blocks of the following forms:</p>
 144
 145 <div class="code">
 146 <pre>  /************************************************************
 147     (C) Copyright 1987-2000
 148     Lynx Real-Time Systems, Inc.
 149     San Jose, CA
 150     All rights reserved.
 151
 152     $Date: 2003/11/14 22:44:44 $
 153     $Revision: 1.1 $
 154     ************************************************************/
 155 </pre>
 156 </div>
 157
 158 <p>(Does not contain LynuxWorks, rather Lynx Real-Time Systems)</p>
 159
 160 <div class="code">
 161 <pre>
 162     /*
 163     .FP
 164     ***********************************************************************
 165      Revision History
 166      See ClearCase
 167      Version:
 168     ***********************************************************************
 169     *
 170     * EXPORT NOTICE:
 171     *
 172     *   INFORMATION SUBJECT TO EXPORT CONTROL LAWS
 173     *
 174     * Subject to local country rules and laws when applicable, you
 175     * must comply with the following:
 176     *
 177     * These commodities, technology, or software were exported from
 178     * the United States in accordance with the Export Administration
 179     * Regulations.  Diversion contrary to U. S. law and other relevant
 180     * export controls is prohibited.   They may not be re-exported to
 181     * any of the following destinations without authorization; Cuba,
 182     * Iran, Iraq, Libya, North Korea, Sudan or any other country to
 183     * which shipment is prohibited; nor to end-use(r)s involved in
 184     * chemical, biological, nuclear, or missile weapons activity.
 185     *
 186     * COPYRIGHT NOTICE:
 187     *   (C) Copyright 2001 Rockwell Collins, Inc.  All rights reserved.
 188     *
 189     * FILE NAME:
 190     *   df.c
 191     *
 192     * PURPOSE:
 193     *   utility to display disk usage
 194     *
 195     * NOTES:
 196     *
 197     * ABBREVIATIONS/ACRONYMS:
 198     *
 199     *****************************************************************
 200     .FP END
 201     */
 202     /************************************************************
 203     (C) Copyright 1987-1996
 204     Lynx Real-Time Systems, Inc.
 205     San Jose, CA
 206     All rights reserved.
 207
 208     $Date: 2003/09/10 15:24:57 $
 209     $Revision: 1.1.1.1 $
 210     ************************************************************/
 211 </pre>
 212 </div>
 213
 214 <p>Contains multiple "(C) Copyright" strings, one being ours and the other being Rockwell's. Should both exist in the resultant file?</p>
 215
 216 <div class="code">
 217 <pre>
 218     /*
 219     .FP
 220      **********************************************************************
 221      *
 222      * FILE NAME:
 223      *   hm_load_header.c
 224      *
 225      * PURPOSE:
 226      *    Performs the integrity check of the program and data files
 227      *    in the CPR read only file system.
 228      *
 229      * ABBREVIATIONS/ACRONYMS: (optional)
 230      *
 231      * NOTES: none
 232      *
 233      * COPYRIGHT NOTICE:
 234      *   (C) Copyright 2001-2002 Rockwell Collins, Inc.  All rights reserved.
 235      *       Proprietary and confidential material.  Distribution,
 236      *       use, and disclosure restricted by Rockwell Collins, Inc.
 237      *    Copyright (c) 2003-2004, LynuxWorks, Inc. All Rights Reserved.
 238      *
 239      ***********************************************************************
 240     .FP END
 241     */
 242 </pre>
 243 </div>
 244
 245 <p>Contains multiple "(C) Copyright" strings, one being ours and the other being Rockwells, in the same comment block! Also notice the inconsistant form of one bying "(C) Copyright" while the other being "Copyright (C)". How should this case be handled?</p>
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 557       <option value="http://defaria.com/blogs/Status/2006/09/">September 2006</option>
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 581       <option value="http://defaria.com/blogs/Status/2006/02/">February 2006</option>
 582
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 589       <option value="http://defaria.com/blogs/Status/2005/12/">December 2005</option>
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 593       <option value="http://defaria.com/blogs/Status/2005/11/">November 2005</option>
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 597       <option value="http://defaria.com/blogs/Status/2005/10/">October 2005</option>
 598
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 605       <option value="http://defaria.com/blogs/Status/2005/08/">August 2005</option>
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 621       <option value="http://defaria.com/blogs/Status/2005/04/">April 2005</option>
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 629       <option value="http://defaria.com/blogs/Status/2005/02/">February 2005</option>
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 633       <option value="http://defaria.com/blogs/Status/2005/01/">January 2005</option>
 634
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 637       <option value="http://defaria.com/blogs/Status/2004/12/">December 2004</option>
 638
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 641       <option value="http://defaria.com/blogs/Status/2004/09/">September 2004</option>
 642
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 645       <option value="http://defaria.com/blogs/Status/2004/08/">August 2004</option>
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 649       <option value="http://defaria.com/blogs/Status/2004/07/">July 2004</option>
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 653       <option value="http://defaria.com/blogs/Status/2004/06/">June 2004</option>
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 657       <option value="http://defaria.com/blogs/Status/2004/05/">May 2004</option>
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 661       <option value="http://defaria.com/blogs/Status/2004/04/">April 2004</option>
 662
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 665       <option value="http://defaria.com/blogs/Status/2004/03/">March 2004</option>
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 670
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 673       <option value="http://defaria.com/blogs/Status/2004/01/">January 2004</option>
 674
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 677       <option value="http://defaria.com/blogs/Status/2003/12/">December 2003</option>
 678
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 681       <option value="http://defaria.com/blogs/Status/2003/11/">November 2003</option>
 682
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