--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ov-fcn-inline.cc	Thu Aug 05 16:08:28 2004 +0000
@@ -0,0 +1,368 @@
+/*
+
+Copyright (C) 2004 David Bateman
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+
+In addition to the terms of the GPL, you are permitted to link
+this program with any Open Source program, as defined by the
+Open Source Initiative (www.opensource.org)
+
+*/
+
+#if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION)
+#pragma implementation
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <iostream>
+
+#include "defun.h"
+#include "error.h"
+#include "gripes.h"
+#include "oct-map.h"
+#include "ov-base.h"
+#include "ov-fcn-inline.h"
+#include "pr-output.h"
+#include "variables.h"
+#include "parse.h"
+
+DEFINE_OCTAVE_ALLOCATOR (octave_fcn_inline);
+
+DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_fcn_inline,
+				     "inline function",
+				     "inline function");
+
+octave_fcn_inline::octave_fcn_inline (const std::string& f,
+				      const string_vector& a, 
+				      const std::string& n)
+  : octave_fcn_handle (0, n), iftext (f), ifargs (a) 
+{
+  // Find a function name that isn't already in the symbol table.
+
+  std::string fname = "__inline__";
+
+  while (symbol_exist (fname))
+    fname.append ("X");
+
+  // Form a string representing the function. 
+
+  OSSTREAM buf;
+
+  buf << "function __retval__ = " << fname << "(";
+
+  for (int i = 0; i < ifargs.length (); i++)
+    {
+      if (i > 0)
+	buf << ", ";
+
+      buf << ifargs(i);
+    }
+
+  buf << ")\n  __retval__ = " << iftext << ";\nendfunction" << OSSTREAM_ENDS;
+  
+  // Parse this function and create a user function.
+
+  octave_value eval_args (OSSTREAM_STR (buf)); 
+
+  feval ("eval", eval_args, 0);
+
+  OSSTREAM_FREEZE (buf);
+
+  octave_value tmp = lookup_function (fname);
+
+  if (tmp.is_function ())
+    {
+      fcn = tmp;
+
+      // XXX FIXME XXX -- probably shouldn't be directly altering the
+      // symbol table here.
+
+      fbi_sym_tab->clear_function (fname);
+    }
+  else
+    error ("inline: unable to define function");
+}
+
+void
+octave_fcn_inline::print (std::ostream& os, bool pr_as_read_syntax) const
+{
+  print_raw (os, pr_as_read_syntax);
+  newline (os);
+}
+
+void
+octave_fcn_inline::print_raw (std::ostream& os, bool pr_as_read_syntax) const
+{
+  OSSTREAM buf;
+
+  if (nm.empty ())
+    buf << "f(";
+  else
+    buf << nm << "(";
+
+  for (int i = 0; i < ifargs.length (); i++)
+    {
+      if (i)
+	buf << ", ";
+
+      buf << ifargs(i);
+    }
+
+  buf << ") = " << iftext << OSSTREAM_ENDS;
+
+  octave_print_internal (os, OSSTREAM_STR (buf), pr_as_read_syntax,
+			 current_print_indent_level ());
+  OSSTREAM_FREEZE (buf);
+}
+
+octave_value
+octave_fcn_inline::convert_to_str_internal (bool, bool) const
+{
+  return octave_value (fcn_text ());
+}
+
+DEFUN (inline, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} inline (@var{str})\n\
+@deftypefnx {Built-in Function} {} inline (@var{str}, @var{arg1}, ...)\n\
+@deftypefnx {Built-in Function} {} inline (@var{str}, @var{n})\n\
+Create an inline function from the character string @var{str}.\n\
+If called with a single argument, the generated function is\n\
+assumed to have a single argument and will be defined\n\
+as the first isolated lower case character, except i or j.\n\
+\n\
+If the second and subsequent arguments are character strings,\n\
+they are the names of the arguments of the function.\n\
+\n\
+If the second argument is an integer @var{n}, the arguments are\n\
+@code{\"x\"}, @code{\"P1\"}, @dots{}, @code{\"P@var{N}\"}.\n\
+@end deftypefn\n\
+@seealso{argnames, formula, vectorize}")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin > 0)
+    {
+      std::string fun = args(0).string_value ();
+
+      if (! error_state)
+	{
+	  string_vector fargs;
+
+	  if (nargin == 1)
+	    {
+	      fargs.resize (1);
+
+	      // Find the first isolated string as the argument of the
+	      // function.
+
+	      // XXX FIXME XXX -- use just "x" for now.
+	      fargs(0) = "x";
+	    }
+	  else if (nargin == 2 && args(1).is_numeric_type ())
+	    {
+	      int n = args(1).int_value ();
+
+	      if (! error_state)
+		{
+		  if (n >= 0)
+		    {
+		      fargs.resize (n+1);
+
+		      fargs(0) = "x";
+
+		      for (int i = 1; i < n+1; i++)
+			{
+			  OSSTREAM buf;
+			  buf << "P" << i << OSSTREAM_ENDS;
+			  fargs(i) = OSSTREAM_STR (buf);
+			  OSSTREAM_FREEZE (buf);
+			}
+		    }
+		  else
+		    {
+		      error ("inline: numeric argument must be nonnegative");
+		      return retval;
+		    }
+		}
+	      else
+		{
+		  error ("inline: expecting second argument to be an integer");
+		  return retval;
+		}
+	    }
+	  else
+	    {
+	      fargs.resize (nargin - 1);
+
+	      for (int i = 1; i < nargin; i++)
+		{
+		  std::string s = args(i).string_value ();
+
+		  if (! error_state)
+		    fargs(i-1) = s;
+		  else
+		    {
+		      error ("inline: expecting string arguments");
+		      return retval;
+		    }
+		}
+	    }
+
+	  retval = octave_value (new octave_fcn_inline (fun, fargs));
+	}
+      else
+	error ("inline: first argument must be a string");
+    }
+  else
+    print_usage ("inline");
+
+  return retval;
+}
+
+DEFUN (formula, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} formula (@var{fun})\n\
+Return a character string representing the inline function @var{fun}.\n\
+Note that @code{char (@var{fun})} is equivalent to\n\
+@code{formula (@var{fun})}.\n\
+@end deftypefn\n\
+@seealso{argnames, inline, vectorize}")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin == 1)
+    {
+      octave_fcn_inline* fn = args(0).fcn_inline_value (true);
+
+      if (fn)
+	retval = octave_value (fn->fcn_text ());
+      else
+	error ("formula: must be an inline function");
+    }
+  else
+    print_usage ("formula");
+
+  return retval;
+}
+
+DEFUN (argnames, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} argnames (@var{fun})\n\
+Return a cell array of character strings containing the names of\n\
+the arguments of the inline function @var{fun}.\n\
+@end deftypefn\n\
+@seealso{argnames, inline, formula, vectorize}")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin == 1)
+    {
+      octave_fcn_inline *fn = args(0).fcn_inline_value (true);
+
+      if (fn)
+	{
+	  string_vector t1 = fn->fcn_arg_names ();
+
+	  Cell t2 (dim_vector (t1.length (), 1));
+
+	  for (int i = 0; i < t1.length (); i++)
+	    t2(i) = t1(i);
+
+	  retval = t2;
+	}
+      else
+	error ("argnames: argument must be an inline function");
+    }
+  else
+    print_usage ("argnames");
+
+  return retval;
+}
+
+DEFUN (vectorize, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} argnames (@var{fun})\n\
+Create a vectorized version of the inline function @var{fun}\n\
+by replacing all occurrences of @code{*}, @code{/}, etc., with\n\
+@code{.*}, @code{./}, etc.\n\
+@end deftypefn\n\
+@seealso{argnames, inline, formula, vectorize}")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin == 1)
+    {
+      octave_fcn_inline* old = args(0).fcn_inline_value (true);
+
+      if (old)
+	{
+	  std::string old_func = old->fcn_text ();
+	  std::string new_func;
+
+	  size_t i = 0;
+
+	  while (i < old_func.length ())
+	    {
+	      std::string t1 = old_func.substr (i, 1);
+
+	      if (t1 == "*" || t1 == "/" || t1 == "\\" || t1 == "^")
+		{
+		  if (i && old_func.substr (i-1, 1) != ".")
+		    new_func.append (".");
+
+		  // Special case for ** operator.
+		  if (t1 == "*" && i < (old_func.length () - 1) 
+		      && old_func.substr (i+1, 1) == "*")
+		    {
+		      new_func.append ("*");
+		      i++;
+		    }
+		}
+	      new_func.append (t1);
+	      i++;
+	    }
+
+	  retval = octave_value (new octave_fcn_inline (new_func, old->fcn_arg_names ()));
+	}
+      else
+	error ("vectorize: must be an inline function");
+    }
+  else
+    print_usage ("vectorize");
+
+  return retval;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/
+
+