readline vs. editline

Hi, all.

I've moved location (within finland) and back on track with LuaX work.. 
   Here's an issue that might be interesting to you, and/or a help 
request:

a) Readline is nice, but GPL
b) BSD libedit does the same, not GPL
c) libedit has readline compatibility _but_not_on_OS_X
d) native libedit coding sucks :)

So, what I'm trying to do is a simple two-function wrapper ('readline' 
and 'add_history') that would use OS X native libedit instead.  The 
code compiles, but does not work as it should.  For example, history 
lines are not available.

What am I doing wrong, here??

-ak



   #ifndef PLATFORM_DARWIN   // Linux has readline compatibility (OS X 
has not!)
     #include <readline/readline.h>
     #include <readline/history.h>
     #define readline_free free
   #else
     #include <histedit.h>   // see 'man editline'
     //
     static EditLine* el= NULL;
     static History* hist= NULL;
     static const char* pr= NULL;
     //
     const char* f_prompt( EditLine* e ) { return pr; }
     //
     static char* readline( const char* prompt )
       {
       if (!el) el= el_init( "gluahost" /*prog*/, stdin, stdout, stderr 
);
       ASSUME(el);
       pr= prompt; el_set( el, EL_PROMPT, f_prompt );
       int count;
       return (char*)el_gets( el, &count );
       }
     //
     static void add_history( char* buffer )
       {
       if (!hist) hist= history_init();
       ASSUME( hist && el );
         {
         HistEvent ev;
         int rc= history( hist, &ev, H_APPEND, buffer );
         ASSUME( rc==0 );  // success?
         }
       }
     //
     #define readline_free(p) /*nothing*/
   #endif  // Darwin
#endif

#if (defined USE_READLINE) || (defined USE_EDITLINE)
     //
     #define lua_readline(L,prompt)  _lua_readline(L,prompt)  // for 
'lua.c'
     //
     static int _lua_readline( lua_State *L, const char *prompt )
     {
     /*const*/ char* buffer;

         buffer= readline(prompt);
         if (!buffer) return 0;	// read fails

         if (buffer[0]) add_history(buffer);	  // remember the line

         lua_pushstring( L, buffer );
         readline_free(buffer);	// sort of essential.. ;)

         return 1;
     }



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