From help-octave-request at che dot utexas dot edu  Fri Feb 17 15:48:43 1995
Subject: Re: LOADPATH problem 
From: John Eaton <jwe at che dot utexas dot edu>
To: Eyal Doron <doron at mickey dot mpi-hd dot mpg dot de>
cc: help-octave at che dot utexas dot edu (Octave mailing list)
Date: Fri, 17 Feb 95 09:47:54 CST

Eyal Doron <doron at mickey dot mpi-hd dot mpg dot de> wrote:

:   I wonder if anybody can solve this. I've got Octave working on an
: Alpha OSF/1 3.0. However. if I specify e.g. the line
: LOADPATH="~/mat:";
: on my .octaverc file, I seem to lose the path to the Octave .m files, 
: in spite of the trailing colon. A leading colon gives the same result.
: Any ideas?

It's a bug.  Here's a patch that should fix it:

Fri Feb 17 08:12:09 1995  John Eaton  <jwe at schoch dot che dot utexas dot edu>

	* src/variables.cc (maybe_add_default_load_path): New function,
	extracted from default_path(), which no longer needs it.
	* src/user-prefs.cc (sv_loadpath): Call it here.


*** src/variables.h~	1995/02/03 21:57:34
--- src/variables.h	1995/02/17 14:47:57
***************
*** 114,119 ****
--- 114,121 ----
  
  extern void install_builtin_variables (void);
  
+ extern char *maybe_add_default_load_path (const char *p);
+ 
  extern char *octave_lib_dir (void);
  extern char *octave_arch_lib_dir (void);
  extern char *octave_bin_dir (void);
*** src/variables.cc~	1995/02/15 21:16:26
--- src/variables.cc	1995/02/17 15:31:07
***************
*** 378,383 ****
--- 378,410 ----
    return pager_binary;
  }
  
+ // Always returns a new string.
+ 
+ char *
+ maybe_add_default_load_path (const char *p)
+ {
+   static char *std_path = subst_octave_home (OCTAVE_FCNFILEPATH);
+ 
+   char *pathstring = strsave (p);
+ 
+   if (pathstring[0] == SEPCHAR)
+     {
+       char *tmp = pathstring;
+       pathstring = strconcat (std_path, pathstring);
+       delete [] tmp;
+     }
+ 
+   int tmp_len = strlen (pathstring);
+   if (pathstring[tmp_len-1] == SEPCHAR)
+     {
+       char *tmp = pathstring;
+       pathstring = strconcat (pathstring, std_path);
+       delete [] tmp;
+     }
+ 
+   return pathstring;
+ }
+ 
  char *
  octave_lib_dir (void)
  {
***************
*** 396,431 ****
  char *
  default_path (void)
  {
-   static char *pathstring = 0;
-   delete [] pathstring;
- 
    static char *std_path = subst_octave_home (OCTAVE_FCNFILEPATH);
  
!   char *oct_path = getenv ("OCTAVE_PATH");
  
!   if (oct_path)
!     {
!       pathstring = strsave (oct_path);
! 
!       if (pathstring[0] == SEPCHAR)
! 	{
! 	  char *tmp = pathstring;
! 	  pathstring = strconcat (std_path, pathstring);
! 	  delete [] tmp;
! 	}
! 
!       int tmp_len = strlen (pathstring);
!       if (pathstring[tmp_len-1] == SEPCHAR)
! 	{
! 	  char *tmp = pathstring;
! 	  pathstring = strconcat (pathstring, std_path);
! 	  delete [] tmp;
! 	}
!     }
!   else
!     pathstring = strsave (std_path);
  
!   return pathstring;
  }
  
  char *
--- 423,436 ----
  char *
  default_path (void)
  {
    static char *std_path = subst_octave_home (OCTAVE_FCNFILEPATH);
  
!   static char *oct_path = getenv ("OCTAVE_PATH");
  
!   static char *pathstring = 0;
!   delete [] pathstring;
  
!   return oct_path ? strsave (oct_path) : strsave (std_path);
  }
  
  char *
*** src/user-prefs.cc~	1995/02/15 21:19:47
--- src/user-prefs.cc	1995/02/17 14:47:38
***************
*** 704,710 ****
    if (s)
      {
        delete [] user_pref.loadpath;
!       user_pref.loadpath = s;
      }
    else
      {
--- 704,710 ----
    if (s)
      {
        delete [] user_pref.loadpath;
!       user_pref.loadpath = maybe_add_default_load_path (s);
      }
    else
      {


Thanks,

jwe