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# pwebmac – Consolidated WEB macros for DVI and PDF output
The original [WEB](https://ctan.org/pkg/web) system by Donald Knuth has the
macros `webmac.tex` that produce DVI output only; for historic reasons, it
will never be modified (apart from catastrophic errors).
Hàn Thế Thành has extended these macros in his (outdated?) `pdfwebmac.tex` for
PDF output (only) with [pdfTeX](https://ctan.org/pkg/pdftex).
Jonathan Kew's [XeTeX](https://ctan.org/pkg/xetex) has similar macros
`xewebmac.tex` by Khaled Hosny that include and _modify_ `webmac.tex` for PDF
output; all these macros can only be used with a specific “TeX engine” each.
The present `pwebmac` package integrates these three WEB macro files similar
to `cwebmac.tex` in Silvio Levy's and Don Knuth's
[CWEB](https://ctan.org/pkg/cweb) system, so `pwebmac.tex` can be used with
“plain TeX,” “pdfTeX,” and “XeTeX” alike. And it adds full support for Martin
Ruckert's “[HiTeX](https://ctan.org/pkg/hitex)” engine and its `HINT` output
format.
Its initial application is the production of PDF and HINT files for all major
WEB programs for “TeX and friends” as distributed in
[TeX Live](https://www.tug.org/texlive). For this purpose, the shell script
`makeall` was whipped together; it provides various commandline options and
works around several “quirks” in the WEB sources. The resulting collection
of PDF documents can be browsed in the `knuth-pdf` package amd the collection
of HINT documents are available in the `knuth-hint` package.
WEB programmers who want to use `pwebmac.tex` instead of the default
`webmac.tex` in their programs have to change the first line in the TeX file
created by `weave`. From there, all depends on the “TeX engine” you use:
“plain TeX” by default creates DVI output, “plain TeX” with the invocation
`tex "\let\pdf+\input…"`, `pdftex`, and `xetex` create PDF output with
clickable links and bookmarks (depending on your PDF viewer), and `hitex`
creates HINT output that can be viewed with the `hintview` program.
The `pwebmac` package is free software and may be used without constraints.
This is version “4.7” of the `pwebmac` package — 2022-02-05, Andreas Scherer.
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