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<h1>Gedcom parser in Genes</h1>
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+
<div align="Left">The intention of this page is to provide some explanation
- of the gedcom parser, to aid development on and with it. Currently,
- the parser is in a state that it works, but some parts are still missing,
- notably the interface towards applications. First, some practical issues
- of testing with the parser will be explained.<br>
- <br>
-
-<h2>Basic testing<br>
- </h2>
- The parser is located in the "gedcom" subdirectory of the Genes source
-code. You should be able to perform a basic test using the commands:<br>
-
-<blockquote><code>make clean<br>
- make<br>
- make test</code><br>
- </blockquote>
- If everything goes OK, you'll see that some gedcom files are parsed, and
- that each parse is successful. Note that the used gedcom files are
-made by <a href="http://heiner-eichmann.de/gedcom/gedcom.htm">Heiner Eichmann</a>
- and are an excellent way to test gedcom parsers thoroughly.<br>
+ of the gedcom parser, to aid development on and with it. Currently,
+ the parser is in a state that it works, but some parts are still missing,
+ notably the interface towards applications. First, some practical
+issues of testing with the parser will be explained.<br>
<br>
- <h2>Preparing for further testing</h2>
- The basic testing described above doesn't show anything else than "Parse
- succeeded", which is nice, but not very interesting. Some more detailed
- tests are possible, via the <code>gedcom-parse</code> program that is generated
- by <code>make test</code>. <br>
- <br>
- However, since the output that <code>gedcom-parse</code> generates is
-in UTF-8 format (more on this later), some preparation is necessary to have
-a full view on it. Basically, you need a terminal that understands and
-can display UTF-8 encoded characters, and you need to proper fonts installed
- to display them. I'll give some advice on this here, based on the Red
- Hat 7.1 distribution that I use, with glibc 2.2 and XFree86 4.0.x. Any
- other distribution that has the same or newer versions for these components
- should give the same results.<br>
- <br>
- For the first issue, the UTF-8 capable terminal, the safest bet is to
-use <code>xterm</code> in its unicode mode (which is supported by the
- <code> xterm</code> coming with XFree86 4.0.x). UTF-8 capabilities
-have only recently been added to <code>gnome-terminal</code>, so probably
-that is not in your distribution yet (it certainly isn't in Red Hat 7.1).<br>
- <br>
- For the second issue, you'll need the ISO 10646-1 fonts. These come
- also with XFree86 4.0.x.<br>
- <br>
- The way to start <code>xterm</code> in unicode mode is then e.g. (put
-everything on 1 line !):<br>
+<h2>Basic testing<br>
+ </h2>
+ The parser is located in the "gedcom" subdirectory of the Genes source
+ code. You should be able to perform a basic test using the commands:<br>
- <blockquote><code>LANG=en_GB.UTF-8 xterm -bg 'black' -fg 'DarkGrey' -cm
- -fn '-Misc-Fixed-Medium-R-SemiCondensed--13-120-75-75-C-60-ISO10646-1'</code><br>
+<blockquote><code>make clean<br>
+ make<br>
+ make test</code><br>
</blockquote>
- This first sets the <code>LANG</code> variable to a locale that uses
- UTF-8, and then starts <code>xterm</code> with a proper Unicode font. Some
- sample UTF-8 plain text files can be found <a href="http://www.cl.cam.ac.uk/%7Emgk25/ucs/examples">
- here</a>
- . Just <code>cat</code> them on the command line and see the result.<br>
+ If everything goes OK, you'll see that some gedcom files are parsed,
+and that each parse is successful. Note that the used gedcom files
+are made by <a href="http://heiner-eichmann.de/gedcom/gedcom.htm">Heiner
+Eichmann</a>
+ and are an excellent way to test gedcom parsers thoroughly.<br>
<br>
-
- <h2>Testing the parser with debugging</h2>
- Given the UTF-8 capable terminal, you can now let the <code>gedcom-parse</code>
- program print the values that it parses. An example of a command
-line is (in the <code>gedcom</code> directory):<br>
-
- <blockquote><code>./gedcom_parse -dg t/ulhc.ged</code><br>
+
+ <h2>Preparing for further testing</h2>
+ The basic testing described above doesn't show anything else than "Parse
+ succeeded", which is nice, but not very interesting. Some more detailed
+ tests are possible, via the <code>gedcom-parse</code> program that is generated
+ by <code>make test</code>. <br>
+ <br>
+ However, since the output that <code>gedcom-parse</code> generates is
+ in UTF-8 format (more on this later), some preparation is necessary to
+have a full view on it. Basically, you need a terminal that understands
+and can display UTF-8 encoded characters, and you need to proper fonts installed
+ to display them. I'll give some advice on this here, based on the
+Red Hat 7.1 distribution that I use, with glibc 2.2 and XFree86 4.0.x. Any
+ other distribution that has the same or newer versions for these components
+ should give the same results.<br>
+ <br>
+ For the first issue, the UTF-8 capable terminal, the safest bet is to
+ use <code>xterm</code> in its unicode mode (which is supported by the
+ <code> xterm</code> coming with XFree86 4.0.x). UTF-8 capabilities
+ have only recently been added to <code>gnome-terminal</code>, so probably
+ that is not in your distribution yet (it certainly isn't in Red Hat 7.1).<br>
+ <br>
+ For the second issue, you'll need the ISO 10646-1 fonts. These
+come also with XFree86 4.0.x.<br>
+ <br>
+ The way to start <code>xterm</code> in unicode mode is then e.g. (put
+ everything on 1 line !):<br>
+
+ <blockquote><code>LANG=en_GB.UTF-8 xterm -bg 'black' -fg 'DarkGrey' -cm
+ -fn '-Misc-Fixed-Medium-R-SemiCondensed--13-120-75-75-C-60-ISO10646-1'</code><br>
</blockquote>
- The <code>-dg</code> option instructs the parser to show its own debug
-messages (see <code>./gedcom_parse -h</code> for the full set of options).
- If everything is OK, you'll see the values from the gedcom file, containing
-a lot of special characters.<br>
+ This first sets the <code>LANG</code> variable to a locale that
+uses UTF-8, and then starts <code>xterm</code> with a proper Unicode font.
+ Some sample UTF-8 plain text files can be found <a href="http://www.cl.cam.ac.uk/%7Emgk25/ucs/examples">
+ here</a>
+ . Just <code>cat</code> them on the command line and see the result.<br>
<br>
- For the ANSEL test file (<code>t/ansel.ged</code>), you have to set the
-environment variable <code>GCONV_PATH</code> to the <code>ansel</code> subdirectory
-of the gedcom directory:<br>
-
- <blockquote><code>export GCONV_PATH=./ansel<br>
- ./gedcom_parse -dg t/ansel.ged<br>
- </code></blockquote>
- This is because for the ANSEL character set an extra module is needed for
- the iconv library (more on this later). But again, this should show
- a lot of special characters.<br>
+
+ <h2>Testing the parser with debugging</h2>
+ Given the UTF-8 capable terminal, you can now let the <code>gedcom-parse</code>
+ program print the values that it parses. An example of a command
+ line is (in the <code>gedcom</code> directory):<br>
+
+ <blockquote><code>./gedcom_parse -dg t/ulhc.ged</code><br>
+ </blockquote>
+ The <code>-dg</code> option instructs the parser to show its own debug
+ messages (see <code>./gedcom_parse -h</code> for the full set of
+options). If everything is OK, you'll see the values from the gedcom
+file, containing a lot of special characters.<br>
<br>
-
+ For the ANSEL test file (<code>t/ansel.ged</code>), you have to set the
+ environment variable <code>GCONV_PATH</code> to the <code>ansel</code> subdirectory
+ of the gedcom directory:<br>
+
+ <blockquote><code>export GCONV_PATH=./ansel<br>
+ ./gedcom_parse -dg t/ansel.ged<br>
+ </code></blockquote>
+ This is because for the ANSEL character set an extra module is needed
+for the iconv library (more on this later). But again, this should
+show a lot of special characters.<br>
+ <br>
+
<h2>Testing the lexers separately</h2>
- The lexers themselves can be tested separately. For the 1-byte lexer
- (i.e. supporting the encodings with 1 byte per characters, such as ASCII,
- ANSI and ANSEL), the sequence of commands would be:<br>
-
+ The lexers themselves can be tested separately. For the 1-byte
+lexer (i.e. supporting the encodings with 1 byte per characters, such as
+ASCII, ANSI and ANSEL), the sequence of commands would be:<br>
+
<blockquote><code>make clean<br>
- make test_1byte<br>
- cat t/allged.ged | ./test_1byte</code><br>
- </blockquote>
- This will show all tokens in the <code>t/allged.ged</code> test file. With
- the lexers you have to make sure that you use the proper lexer for each
-test file. The <code>test_1byte</code> test program is OK for <code>
-allged.ged</code> and <code>ansel.ged</code> (the last one again with the
-environment variable set); for the <code>uhl*.ged</code> files you need
-the <code>test_hilo</code> test program; for the <code>ulh*.ged</code>
-files you need the <code>test_lohi</code> program.<br>
- <br>
- This concludes the testing setup. Now for some explanations...<br>
- <br>
-
+ make test_1byte<br>
+ </code></blockquote>
+This will show all tokens in the <code>t/allged.ged</code> test file. Similar
+tests can be done using <code>make test_hilo</code> and <code>make test_lohi</code>
+ (for the unicode lexers).<br>
+ <br>
+ This concludes the testing setup. Now for some explanations...<br>
+ <br>
+
<h2>Structure of the parser</h2>
- I see the structure of a program using the gedcom parser as follows:<br>
- <br>
- <img src="images/schema.png" alt="Gedcom parsing scheme">
- <br>
- <br>
+ I see the structure of a program using the gedcom parser as follows:<br>
+ <br>
+ <img src="images/schema.png" alt="Gedcom parsing scheme">
+ <br>
+ <br>
+ <br>
+ TO BE COMPLETED...<br>
+
+ <hr width="100%" size="2">$Id: parser.html,v 1.2 2001/12/01 15:29:00
+verthezp Exp $<br>
+ $Name$<br>
<br>
- TO BE COMPLETED...<br>
- <br>
- </div>
- </div>
-
+ </div>
+ </div>
+
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