Vjylku

I can get the following code to compile, using luatex, with the Hindi/Devanagari characters correctly printed in the pdf:

documentclass{article}

usepackage{fontspec}

setmainfont{Times New Roman}

newfontscript{Devanagari}{deva,dev2}

newfontface{hindi}[Script=Devanagari]{Lohit-Devanagari.ttf}



begin{document}

Here is normal text.

{hindi नमस्ते }

end{document} 

However, I'm using a program that outputs the tex and that won't allow me to type the Hindi script into my tex editor; instead, it will only give me the unicode version of the word, "नमस्ते", which is "<U+0928><U+092E><U+0938><U+094D><U+0924><U+0947>".

How can I get luatex to compile correctly from these raw code characters? What I want to compile (to produce a pdf with the single word "नमस्ते") is something like this:

documentclass{article}

usepackage{fontspec}

setmainfont{Times New Roman}

newfontscript{Devanagari}{deva,dev2}

newfontface{hindi}[Script=Devanagari]{Lohit-Devanagari.ttf}



begin{document}

Here is normal text.

{hindi <U+0928><U+092E><U+0938><U+094D><U+0924><U+0947> }

end{document} 

...but that won't work.

(added an extra operation in the Lua function 'conv' to address the OP's follow-up request)

Since you're using LuaLaTeX, here's a solution that employs a Lua function to convert strings of the form '<U%+(.-)>' to '\char"%1'; here, %+ represents the literal character + and %1 represents the non-greedy "capture" of the pattern (.-) -- in words: "0 or more characters other than >". In a second step, the Lua function converts any whitespace characters present in the string to explicit (interword) whitespace.

In addition, the code also sets up a LaTeX macro that acts as a front-end for the Lua function. Thus, one may call the Lua function via a conv{<your string here>} directive.

You can either manually encase the sequences of unicode code in conv{...} statements or, depending on how far you can get your program to do the work for you, instruct the scripting program to encase the sequences of unicode code in a conv{...} statements automatically.

documentclass{article}

usepackage{fontspec}

setmainfont{Times New Roman}

newfontscript{Devanagari}{deva,dev2}

newfontface{hindi}[Script=Devanagari]{Lohit-Devanagari.ttf}



%%%% -- copy the next eight lines of code to your document -- 

usepackage{luacode} % for 'luacode' env. and 'luastringN' macro

begin{luacode}

function conv ( s ) 

   s = s:gsub ( '<U%+(.-)>' , '\char"%1' ) 

   tex.sprint ( ( s:gsub( '%s+' , '\ ' ) ) )

end

end{luacode}

newcommandconv[1]{directlua{conv(luastringN{#1})}}



begin{document}

Latin-alphabet text.



{hindi नमस्ते }



{hindi conv{<U+0928><U+092E><U+0938><U+094D><U+0924><U+0947>} }



{hindi conv{<U+0928><U+092E><U+0938><U+094D><U+0924><U+0947> <U+0930><U+093E><U+091C>}}

end{document}