Re: [NTG-context] Lua in LuaLaTeX is diferent??

Sat, 05 Jun 2010 23:34:44 -0700 

Thanks very much.
It is very unpleasant findings, but, it explains everything.
Can be detected using Lua whether application runs under LuaLaTeX or LuaPlain and then load the library? How can I retrieve LuaLib? Where can I get more information? I did some Googling but without success. 
Thanx Jaroslav




Dne 6.6.2010 4:46, Khaled Hosny napsal(a):

On Sun, Jun 06, 2010 at 01:35:23AM +0200, Jaroslav Hajtmar wrote:

Hi,

I am sending examples of functions:

The first function is functional in ConTeXt MKIV even LuaLaTeX.

-- Global variables for setup in library (it be used when glob. vars
Sep, Ld, Rd is not setting in main aplication):
UserCSVSeparator=';'
UserCSVLeftDelimiter=''
UserCSVRightDelimiter=''




function ParseCSVdata(s)
     local Sep = (Sep == nil) and UserCSVSeparator or Sep
     local Ld = (Ld == nil) and UserCSVLeftDelimiter or Ld
     local Rd = (Rd == nil) and UserCSVRightDelimiter or Rd
     if Ld ~= '' or Rd ~= '' then
        local s=string.sub(s, string.find(s, Ld)+1, string.find(s,
Rd,-1)-1)
     end
     local fieldsep=tostring(Rd..Sep..Ld)
     local result = {}
   local from  = 1
   local sep_from, sep_to = string.find( s, fieldsep, from  )
   while sep_from do
     table.insert( result, string.sub( s, from , sep_from-1 ) )
     from  = sep_to + 1
     sep_from, sep_to = string.find( s, fieldsep, from  )
   end
   table.insert( result, string.sub( s, from  ) )
   return result
end


The second is more universal, but it only works in ConTeXt MKIV.
LuaLaTeX report error: "attempt to call field 'split' (a nil value) ... ." 

function ParseCSVdata(string2parse, separator, leftdelimiter,
rightdelimiter)
     Sep = (Sep == nil) and UserCSVSeparator or Sep
     Ld = (Ld == nil) and UserCSVLeftDelimiter or Ld
     Rd = (Rd == nil) and UserCSVRightDelimiter or Rd
   local separator = (separator == nil) and Sep or separator
local leftdelimiter = (leftdelimiter == nil) and Ld or leftdelimiter local rightdelimiter = (rightdelimiter == nil) and Rd or rightdelimiter 
     local result={}
         if leftdelimiter ~= '' and rightdelimiter ~= '' then
             string.gsub(string2parse,
leftdelimiter.."(.-)"..rightdelimiter, function(a)
table.insert(result,a) end )
         else
           result=string.split(string2parse,separator)
         end
     return result
end


I would like to benefit from the second function, but I want the
application was applicable even LuaLaTeX

You need the lualibs package, which imports some of the extended lua
librarires from ConTeXt, since string.split() is not a standad lua
function.

Regards,
  Khaled



Thanx Jaroslav




Dne 5.6.2010 22:19, Jaroslav Hajtmar napsal(a):

Hi,
I did a Lua application for ConTeXt, and now I wanted to adapt it
to work even LuaLaTeX.
On what needs to be careful? Compiling  by LuaLaTeX specific
messages appear as if the Lua in LuaLaTeX didnt know some Lua
commands (i.e. split, find .... ).

On what needs to be careful generaly when programming applications
for LuaLaTeX?

Thanx Jaroslav
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