[pdftex] page size with pdfjadetex

[David Carlisle]

beware of just changing \p@ to bp.
\p@ is used in other places as well, in particular in order to do
arithmetic in tex, eg add 1.2 + 1.2 the easiest way is to add 1.2pt +
1.2pt then remove the pt. often this is coded using \p@

eg the following from jadetex.ltx

\def\c at lor@RGB at rgb#1#2{%
  \dimen@#1\p@

this is converting 0-255 based RGB indexing to 0-1 based, but will get
it wrong if \p@ is changed globally.


David


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