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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