File: input.sci

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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) XXXX-2008 - INRIA
// Copyright (C) 2009-2010 - DIGITEO - Allan CORNET
// 
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution.  The terms
// are also available at    
// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt


function [x] = input(msg, flag)

  if type(msg) <> 10 then
    error(msprintf(gettext("%s: Wrong type for input argument #%d: String expected.\n"),"input",1));
  end

  if size(msg, "*") <> 1 then
    error(msprintf(gettext("%s: Wrong size for input argument #%d: A string expected.\n"),"input",1));
  end
  
  // a tricky way to get all ascii codes  sequences
  fmt = "%[" + ascii(32) + "-" + ascii(254) + "]";
  
  currentprompt = prompt();
  
  if argn(2) == 2 then
    if type(flag) <> 10 then
      error(msprintf(gettext("%s: Wrong type for input argument #%d: String expected.\n"),"input",2));
    end
    
    if size(flag, "*") <> 1 then
      error(msprintf(gettext("%s: Wrong size for input argument #%d: A string expected.\n"),"input",2));
    end
    
    if (flag <> 's' & flag <> 'string') then
      error(msprintf(gettext("%s: Wrong value for input argument #%d: ''%s'' value expected.\n"),"input",2,'string'));
    end

    prompt(msg);
    x = mscanf(fmt);
    
    currentpromptAfter = prompt();
    // bug 5513
    // we had change prompt during exec of input
    // we recall input
    if (currentpromptAfter <> currentprompt) then
    	x = input(msg, flag);
    end
    
  else
    while %t
      prompt(msg);
      x = mscanf(fmt);
      
      currentpromptAfter = prompt();
      // bug 5513
      // we had change prompt during exec of input
      // we recall input
      if (currentpromptAfter <> currentprompt) then
    	  x = string(input(msg));
      end
      
      if (length(x) == 0) | (x == ' ') then 
        x = "[]";
      end
       ierr = execstr("x=" + x,"errcatch");
      if ierr == 0 then 
        break;
      end
      mprintf(strcat(lasterror(),"\n"));
    end
    
  end
  prompt(currentprompt);
endfunction