Re: [xsl] String hashing code

[Robert Koberg <rob@xxxxxxxxxx>]

On Fri, 2007-12-14 at 18:36 +1100, Deborah Pickett wrote:
> 
> I am processing a number of separate XML documents using an Ant <xslt>
> task, pulling out the MathML that is embedded inside them into their own
> XML files using xsl:result-document (where I render them using Batik).
> I want to make sure that the result document names don't clash, but
> because they are across several source files, generate-id() isn't going
> to suffice.  There are thousands of source files, all with
> English-sounding names spread across many directories.

Use the file name/path and concat with generate-id() (or position() if
they have the same parent). Either output them to the same directory as
the source file or to some mirrored dir structure.

best,
-Rob


> 
> I was thinking of hashing document-uri(/) to produce a probably-unique
> string that I can then append generate-id(.) to.  I rejected
> encode-for-uri() as producing strings that are too long, and for not
> anonymizing the document uri enough.  All the hashing algorithms I know
> (MD5, for instance) happen to be heavy on bitwise operations, and I feel
> dirty doing bitwise operations with arithmetic.
> 
> I prefer not to escape to non-XSLT, because I am providing this as part
> of a library that needs to run on almost any XSLT 2.0 platform.
> 
> Any clever ideas?