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ifptex Package Bundle
=====================
TeX: To check the engine is pTeX (or its derivatives)
The ifptex package is a counterpart of ifxetex, ifluatex, etc. for
the pTeX engine. The ifuptex package is an alises to ifptex provided
for backward compatibility.
### System Requirements
- TeX format: plain TeX, LaTeX (and any plain-compatible ones).
- TeX engine: Anything.
- DVI driver (in DVI mode): Anything.
### Installation
In a system compliant to TDS 1.1, move the files as follows:
- `*.sty` → $TEXMF/tex/latex/ifptex
And rehash your TEXMF trees if necessary.
### License
This package is distributed under the MIT License.
ifptex Package ― Test for pTeX engine
--------------------------------------
### Package Loading
In plain TeX:
\input ifptex.sty
In LaTeX:
\usepackage{ifptex}
### Usage
NB: Here “e-TeX-ness” is not considered.
* `\ifpTeX` (or `\ifptex`) [if-token]
Whether the engine is pTeX (including upTeX or pTeX-ng).
* `\ifstrictpTeX` (or `\ifstrictptex`) [if-token]
Whether the engine is pTeX but *not* upTeX or pTeX-ng.
* `\ifupTeX` (or `\ifuptex`) [if-token]
Whether the engine is upTeX (including pTeX-ng).
* `\ifstrictupTeX` (or `\ifstrictuptex`) [if-token]
Whether the engine is upTeX but *not* pTeX-ng.
* `\ifnativeupTeX` [if-token]
Whether the engine is upTeX and its internal encoding is Unicode.
* `\ifpTeXng` (or `\ifptexng`) [if-token]
Whether the engine is pTeX-ng.
* `\RequirepTeX`
Issues an error if `\ifpTeX` fails.
* `\RequireStrictpTeX`
Issues an error if `\ifstrictpTeX` fails.
* `\RequireupTeX`
Issues an error if `\ifupTeX` fails.
* `\RequireStrictupTeX`
Issues an error if `\ifstrictupTeX` fails.
* `\RequireNativeupTeX`
Issues an error if `\ifnativeupTeX` fails.
* `\RequirepTeXng`
Issues an error if `\ifpTeXng` fails.
ifuptex Package ― Alias of ifptex
----------------------------------
The ifuptex package does nothing but loading ifptex internally. It is
provided for backward compatibility.
### Package Loading
In plain TeX:
\input ifuptex.sty
In LaTeX:
\usepackage{ifuptex}
### Usage
Just the same as the ifptex package.
Revision History
----------------
* Version 1.2c 〈2017/10/04〉
* Version 1.2b 〈2017/09/20〉
* Version 1.2a 〈2017/09/15〉
* Version 1.2 〈2017/09/09〉
- Add `\ifstrictupTeX` and `RequireStrictupTeX`.
* Version 1.1 〈2017/05/04〉
- Minor fix.
* Version 1.0 〈2013/04/29〉
- Move to a separate bundle.
- Change the package name to ifptex, and added the test
for pTeX (besides upTeX).
* Version 0.2 〈2008/03/14〉
- First public version.
--------------------
Takayuki YATO (aka. "ZR")
https://github.com/zr-tex8r
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