import of readlilne 5.1

[deliverable/binutils-gdb.git] / readline / callback.c

diff --git a/readline/callback.c b/readline/callback.c
index a8f4323c929f467c905b4781e867c641908a1646..9120969ca238f627341c8a1bbfeaead7af744048 100644 (file)
--- a/readline/callback.c
+++ b/readline/callback.c
@@ -1,6 +1,6 @@
 /* callback.c -- functions to use readline as an X `callback' mechanism. */
 
-/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2005 Free Software Foundation, Inc.
 
    This file is part of the GNU Readline Library, a library for
    reading lines of text with interactive input and history editing.
@@ -44,9 +44,14 @@
 #include "readline.h"
 #include "rlprivate.h"
 
+/* Private data for callback registration functions.  See comments in
+   rl_callback_read_char for more details. */
+_rl_callback_func_t *_rl_callback_func = 0;
+_rl_callback_generic_arg *_rl_callback_data = 0;
+
 /* **************************************************************** */
 /*                                                                 */
-/*                     Callback Readline Functions                 */
+/*                     Callback Readline Functions              */
 /*                                                                 */
 /* **************************************************************** */
 
@@ -72,7 +77,8 @@ _rl_callback_newline ()
     {
       in_handler = 1;
 
-      (*rl_prep_term_function) (_rl_meta_flag);
+      if (rl_prep_term_function)
+       (*rl_prep_term_function) (_rl_meta_flag);
 
 #if defined (HANDLE_SIGNALS)
       rl_set_signals ();
@@ -89,6 +95,7 @@ rl_callback_handler_install (prompt, linefunc)
      rl_vcpfunc_t *linefunc;
 {
   rl_set_prompt (prompt);
+  RL_SETSTATE (RL_STATE_CALLBACK);
   rl_linefunc = linefunc;
   _rl_callback_newline ();
 }
@@ -98,7 +105,8 @@ void
 rl_callback_read_char ()
 {
   char *line;
-  int eof;
+  int eof, jcode;
+  static procenv_t olevel;
 
   if (rl_linefunc == NULL)
     {
@@ -106,7 +114,79 @@ rl_callback_read_char ()
       abort ();
     }
 
-  eof = readline_internal_char ();
+  memcpy ((void *)olevel, (void *)readline_top_level, sizeof (procenv_t));
+  jcode = setjmp (readline_top_level);
+  if (jcode)
+    {
+      (*rl_redisplay_function) ();
+      _rl_want_redisplay = 0;
+      memcpy ((void *)readline_top_level, (void *)olevel, sizeof (procenv_t));
+      return;
+    }
+
+  if  (RL_ISSTATE (RL_STATE_ISEARCH))
+    {
+      eof = _rl_isearch_callback (_rl_iscxt);
+      if (eof == 0 && (RL_ISSTATE (RL_STATE_ISEARCH) == 0) && RL_ISSTATE (RL_STATE_INPUTPENDING))
+       rl_callback_read_char ();
+
+      return;
+    }
+  else if  (RL_ISSTATE (RL_STATE_NSEARCH))
+    {
+      eof = _rl_nsearch_callback (_rl_nscxt);
+      return;
+    }
+  else if (RL_ISSTATE (RL_STATE_NUMERICARG))
+    {
+      eof = _rl_arg_callback (_rl_argcxt);
+      if (eof == 0 && (RL_ISSTATE (RL_STATE_NUMERICARG) == 0) && RL_ISSTATE (RL_STATE_INPUTPENDING))
+       rl_callback_read_char ();
+      /* XXX - this should handle _rl_last_command_was_kill better */
+      else if (RL_ISSTATE (RL_STATE_NUMERICARG) == 0)
+       _rl_internal_char_cleanup ();
+
+      return;
+    }
+  else if (RL_ISSTATE (RL_STATE_MULTIKEY))
+    {
+      eof = _rl_dispatch_callback (_rl_kscxt); /* For now */
+      while ((eof == -1 || eof == -2) && RL_ISSTATE (RL_STATE_MULTIKEY) && _rl_kscxt && (_rl_kscxt->flags & KSEQ_DISPATCHED))
+       eof = _rl_dispatch_callback (_rl_kscxt);
+      if (RL_ISSTATE (RL_STATE_MULTIKEY) == 0)
+       {
+         _rl_internal_char_cleanup ();
+         _rl_want_redisplay = 1;
+       }
+    }
+  else if (_rl_callback_func)
+    {
+      /* This allows functions that simply need to read an additional character
+        (like quoted-insert) to register a function to be called when input is
+        available.  _rl_callback_data is simply a pointer to a struct that has
+        the argument count originally passed to the registering function and
+        space for any additional parameters.  */
+      eof = (*_rl_callback_func) (_rl_callback_data);
+      /* If the function `deregisters' itself, make sure the data is cleaned
+        up. */
+      if (_rl_callback_func == 0)
+       {
+         if (_rl_callback_data)        
+           {
+             _rl_callback_data_dispose (_rl_callback_data);
+             _rl_callback_data = 0;
+           }
+         _rl_internal_char_cleanup ();
+       }
+    }
+  else
+    eof = readline_internal_char ();
+
+  if (rl_done == 0 && _rl_want_redisplay)
+    {
+      (*rl_redisplay_function) ();
+      _rl_want_redisplay = 0;
+    }
 
   /* We loop in case some function has pushed input back with rl_execute_next. */
   for (;;)
@@ -115,7 +195,8 @@ rl_callback_read_char ()
        {
          line = readline_internal_teardown (eof);
 
-         (*rl_deprep_term_function) ();
+         if (rl_deprep_term_function)
+           (*rl_deprep_term_function) ();
 #if defined (HANDLE_SIGNALS)
          rl_clear_signals ();
 #endif
@@ -131,10 +212,10 @@ rl_callback_read_char ()
          if (in_handler == 0 && rl_linefunc)
            _rl_callback_newline ();
        }
-      if (rl_pending_input)
+      if (rl_pending_input || _rl_pushed_input_available () || RL_ISSTATE (RL_STATE_MACROINPUT))
        eof = readline_internal_char ();
       else
-        break;
+       break;
     }
 }
 
@@ -143,14 +224,37 @@ void
 rl_callback_handler_remove ()
 {
   rl_linefunc = NULL;
+  RL_UNSETSTATE (RL_STATE_CALLBACK);
   if (in_handler)
     {
       in_handler = 0;
-      (*rl_deprep_term_function) ();
+      if (rl_deprep_term_function)
+       (*rl_deprep_term_function) ();
 #if defined (HANDLE_SIGNALS)
       rl_clear_signals ();
 #endif
     }
 }
 
+_rl_callback_generic_arg *
+_rl_callback_data_alloc (count)
+     int count;
+{
+  _rl_callback_generic_arg *arg;
+
+  arg = (_rl_callback_generic_arg *)xmalloc (sizeof (_rl_callback_generic_arg));
+  arg->count = count;
+
+  arg->i1 = arg->i2 = 0;
+
+  return arg;
+}
+
+void _rl_callback_data_dispose (arg)
+     _rl_callback_generic_arg *arg;
+{
+  if (arg)
+    free (arg);
+}
+
 #endif