#1558 (w)gnuplot exits on windows when i type russian letter "я" (all other letters are fine)

[Anonymous]

I'm running GNUPLOT Version 5.0 patchlevel 0 last modified 2015-01-01, installed it from precompiled binary gp500-win32-mingw.exe. Windows 8.1.
I start wgnuplot.exe, type letter 'я' (russian language) - wgnuplot exits.
Same for gnuplot.exe - letter 'я' and gnuplot exits.
All other russian letters work, i can type them in any combination and everything's fine. The single letter 'я' makes wgnuplot finish work and exit.

[Ethan Merritt]

What character encoding does your input use?
Have you set this correctly in the environment?

'я' in UTF8 should be harmless

'я' in iso-8859-5 (Windows code page 28595) is \0239,
which I expect is also harmless

'я' in Windows code page 1251 is \0255 (8-bit representation of -1),
which I could imagine could cause problems if the input method
interprets it instead as end-of-file.

[Sergey Antipov]

"show encoding" produces following output:
nominal character encoding is default
however LC_CTYPE in current locale is Russian_Russia.1251

"show locale":
gnuplot LC_CTYPE Russian_Russia.1251
gnuplot encoding default
gnuplot LC_TIME Russian_Russia.1251
gnuplot LC_NUMERIC C

"Encoding" page in documentation (http://gnuplot.sourceforge.net/docs_4.2/node179.html) shows just available codepages.

I also found something similar with encodings - http://gnuplot.10905.n7.nabble.com/Unicode-Input-in-Gnuplot-s-Interactive-Console-Windows-7-64bit-td19156.html.

and

https://sourceforge.net/p/gnuplot/bugs/1270/ (fixed, closed).

How should i correctly change/init environment for (w)gnuplot?

[Bastian Märkisch]

Confirmed. The bug is related to the fact that e.g. msdos_getch() is returning a char where it should really return an int. Thus readline confuses (char)0xff with EOF, which is (int)-1.
This bug also applies to 4.6 and earlier and other platforms like e.g. OS/2.

[Ethan Merritt]

Seems like it would be worth changing all those platform-specific functions in readline.c to
int func() rather than char func(). I see
msdos_getch
os2_getch
win_getch
Are there others?

[Bastian Märkisch]

Sorry for the delay. Fixed in CVS for version 5.1.