#!/usr/bin/env texlua
--*-Lua-*-
-- $Id$

-- Copyright (C) 2008 Reinhard Kotucha.
-- You may freely use, modify and/or distribute this file.

-- Replacement for ps2ascii.bat.
-- Convert PostScript to ASCII

function fixwin (args_unix)
   if os.type == 'windows' then
      local args_win={}  -- new table
      args_win[0]=args_unix[1]
      for i=1, #args_unix do  
	 args_win[i]='"'..args_unix[i]..'"'
      end
      return args_win
   else
      return args_unix
   end
end

function remove_tmpfiles (tmpfiles)
   for i=1, #tmpfiles do
      if lfs.isfile(tmpfiles[i]) then
	 os.remove(tmpfiles[i])
      end
   end
end

if os.type == 'windows' then
   gs='gswin32c'
else
   gs='gs'
end

command={gs, '-q', '-dNODISPLAY', '-dBATCH', '-dSAFER', '-dDELAYBIND', 
	 '-dWRITESYSTEMDICT', '-dSIMPLE', '-c', 'save', 
	 '-f', 'ps2ascii.ps'}

if #arg < 2 then
   if #arg == 0 then
      command[#command+1]='-'
   elseif #arg == 1 then
      command[#command+1]=arg[1]
   end
   command=fixwin(command)
elseif #arg == 2 then
   -- We need a shell for I/O redirection.
   command=gs..' -q -dNODISPLAY -dBATCH -dSAFER -dDELAYBIND '.. 
      '-dWRITESYSTEMDICT -dSIMPLE -c save '.. 
      '-f ps2ascii.ps "'..arg[1]..'" > "'..arg[2]..'"'
end

--[[ prepend an additional hyphen to activate this code
if type(command) == 'string' then
   print(command)
else
   for i=0, #command do
      print (command[i])
   end
end
os.exit(ret)
--]]

if type(command) == 'string' then
   ret=os.execute(command)
else
   ret=os.spawn(command)
end

remove_tmpfiles{'_temp_.err', '_temp_.out'}
os.exit(ret)