write-region to a negative offset

[Jean-Christophe Helary]

It seems like write-region only accepts a positive offset from the beginning of 
the file.

I'd like to add an xml block at a given position relative to the end of the 
file. I'd rather add to a negative offset from the end of the file since that 
part is static.

Is there a way to do that that does not involve finding the value of point at 
the place I'd like to insert the block ?


Jean-Christophe Helary
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http://mac4translators.blogspot.com @brandelune