olpa, OSS developer

Another libxml2/libxslt bug is found and reported by me.

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After fixing problems with garbage collection, other memory errors are trivial, even if they take a while. This time I used xmlXPathConvertString, which frees its argument. I must read documentation more attentive. What I need is xmlXPathCastToString.

I should feel lucky. I’ve debugged and fixed program crashes, which were induced by garbage collection. It have taken only 4 days. I’ve added 5 lines to the program, and 8 problem issues go away, and more issues will be closed after testing.

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I’m sad I didn’t find the article “Incorporating Guile into your C program” before. It would save me a lot of time. Although the author annotates the article as “a old howto I wrote (very probably terribly out of date at this point as I gave up on Guile a long time ago)”, the article is still correct and very useful (especially in the GC part).

1 October 2005, update

The document is inaccessable today due to problems with the server. Instead, the document can be downloaded from Unofficial Guile Docbits.

I like Kynosarges‘ comment on the Tree Help Plugin for Structured FrameMaker.

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This auxiliary entry is reserved for collecting descriptions of the Tree Help Plugin for Structured FrameMaker.

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I haven’t release a new version of XSieve, and there are no user-visible changes, but it doesn’t mean I do nothing. I’ve been working on low-level technical issues and writing documentation.

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Libxslt optimizes “xsl:text”, but there is no mention of the optimization neither on the site of libxslt, neither in its mailing list. I’ve got the knowledge from the deep debugging session. Should I hate libxslt, or should I love it for its puzzles?

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The XPath specification doesn’t define what is the string value of an entity. Even more, the data model for XPath doesn’t have entities. But in XSieve I do have entities.

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Finally, my GTTSE 2005 photos are online. The start page is approximately 2Mb, and larger photos are of 300Kb-1Mb size. Unfortunately, I can’t describe how great was the event. Instead, read “Resume from GTTSE Summer School” by Steen Brahe.

That’s not funny. Again the namespaces, again a libxslt bug. Libxslt is confused when XSLT and XML use the same prefix with different URI.

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Yet another bug, in yet another program. I like wt2db (WikiText to DocBook, I’ve already written about wt2db), so I’ve submitted a bug.

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I’m trying to write a sort of generative XSLT: an XSLT stylesheet which creates another XSLT stylesheet. Unfortunately, I’ve confused xsltproc.

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I was near starting to fix a “bug”. Fortunately, I asked myself: “is it really a bug, or is it misunderstanding of the specification?” That’s saved me a time. Actually, all works correct and error is in tests.

I’ve just released XSieve 0.0.3. The main changes since XSieve 0.0.2, which was released a week ago, are:

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From a letter. “You should make Python Script for … look more impressive. Currently it works less than 1 second and displays: “ready, press any key”. We expect …”

Don’t use programlistingco and other co-elements of DocBook. They are not supported in full by the DocBook XSL stylesheets.

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I wanted to add my own recursive target in addition to the recursive targets produced by automake. It was not easy.

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XSieve 0.0.2 is the first public release of XSieve, a language which interweaves XSLT and Scheme.

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This week I was porting XSieve installation tarball to GNU standards, in particular, to using ./configure, make, make install. It was not easy, especially because my package is not standard, but I’ve done it. On Monday I plan to update documentation and release the version 0.0.2.

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