This forum is a read-only archive of the Gammon Software forum (2000–2026). No new posts can be made. Search the archive.

extended ascii being munged in Lua plugins?

Posted by Fiendish on Mon 07 Apr 2014 05:00 AM — 8 posts, 22,726 views.

Fiendish USA Global Moderator #0
On my input line \\\print(string.gsub("───", "─","-")) prints the expected "---".
But if I then put that line in a plugin it fails to work.

If I introduce an error on that line, it spits out

Quote:
63*: text = string.gsubd(text, "─","-")


Is the plugin processor interfering with my strings?
Nick Gammon Australia Forum Administrator #1
I can't reproduce that. Using this plugin:


<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE muclient>

<muclient>
<plugin
   name="test_extended_ascii"
   author="Nick Gammon"
   id="b0ba651e71e0c226a60ae8f2"
   language="Lua"
   purpose="Test for Fiendish"
   date_written="2014-04-08 09:43:19"
   requires="4.90"
   version="1.0"
   >

</plugin>

<script>

function OnPluginInstall ()
print(string.gsub("───", "─","-"))
end -- function

</script>

</muclient>


I see:


--- 3
Reinstalled plugin test_extended_ascii (b0ba651e71e0c226a60ae8f2)


Changing "gsub" to "gsubd" I see:


Run-time error
Plugin: test_extended_ascii (called from world: smaug2)
Function/Sub: OnPluginInstall called by Plugin test_extended_ascii
Reason: Executing plugin test_extended_ascii sub OnPluginInstall
[string "Plugin"]:2: attempt to call field 'gsubd' (a nil value)
stack traceback:
        [string "Plugin"]:2: in function <[string "Plugin"]:1>
Error context in script:
   1 : function OnPluginInstall ()
   2*: print(string.gsubd("───", "─","-"))
   3 : end -- function
Added plugin C:\Program Files\MUSHclient\worlds\plugins\test_extended_ascii.xml


Isn't that what you expect?
Fiendish USA Global Moderator #2
What you have is exactly what I expect. What I have is not.
Interesting.
Nick Gammon Australia Forum Administrator #3
Try it with the supplied Lua DLL instead of the JIT one. Also try my exact plugin, see if that makes a difference.

I had UTF-8 turned off in the output window. If I turn it on the output window immediately refreshes to read:


Error context in script:
   1 : function OnPluginInstall ()
   2*: print(string.gsubd("───", "─","-"))
   3 : end -- function
Fiendish USA Global Moderator #4
Nick Gammon said:
Try it with the supplied Lua DLL instead of the JIT one.
Eh. But it works fine for me from the command line with the same dll?

Quote:
Also try my exact plugin, see if that makes a difference.

And your plugin works fine for me too. Uh...
Amended on Wed 09 Apr 2014 01:12 AM by Fiendish
Nick Gammon Australia Forum Administrator #5
Hmmm must be more to this than meets the eye. ;)
Fiendish USA Global Moderator #6
Change your plugin to first print the original line. With UTF8 disabled I see (plus a few boxes that don't print here)
Quote:

───

Which is again not the same as what I get from the input line. :/

At least I can get it to work if I convert tohex/fromhex and gsub hex codes instead of extended ascii.
Amended on Sat 12 Apr 2014 05:22 PM by Fiendish
Nick Gammon Australia Forum Administrator #7
You mean like this?


function OnPluginInstall ()
print ("───")
end -- function


I see:


───


Same as executing it from the command line.