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-rw-r--r--extra/readline/callback.c258
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diff --git a/extra/readline/callback.c b/extra/readline/callback.c
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+/* callback.c -- functions to use readline as an X `callback' mechanism. */
+
+/* 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.
+
+ The GNU Readline Library 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.
+
+ The GNU Readline Library 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.
+
+ The GNU General Public License is often shipped with GNU software, and
+ is generally kept in a file called COPYING or LICENSE. If you do not
+ have a copy of the license, write to the Free Software Foundation,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA. */
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+# include "config_readline.h"
+#endif
+
+#include "rlconf.h"
+
+#if defined (READLINE_CALLBACKS)
+
+#include <sys/types.h>
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#else
+# include "ansi_stdlib.h"
+#endif
+
+#include <stdio.h>
+
+/* System-specific feature definitions and include files. */
+#include "rldefs.h"
+#include "readline.h"
+#include "rlprivate.h"
+#include "xmalloc.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 */
+/* */
+/* **************************************************************** */
+
+/* Allow using readline in situations where a program may have multiple
+ things to handle at once, and dispatches them via select(). Call
+ rl_callback_handler_install() with the prompt and a function to call
+ whenever a complete line of input is ready. The user must then
+ call rl_callback_read_char() every time some input is available, and
+ rl_callback_read_char() will call the user's function with the complete
+ text read in at each end of line. The terminal is kept prepped and
+ signals handled all the time, except during calls to the user's function. */
+
+rl_vcpfunc_t *rl_linefunc; /* user callback function */
+static int in_handler; /* terminal_prepped and signals set? */
+
+/* Make sure the terminal is set up, initialize readline, and prompt. */
+static void
+_rl_callback_newline ()
+{
+ rl_initialize ();
+
+ if (in_handler == 0)
+ {
+ in_handler = 1;
+
+ if (rl_prep_term_function)
+ (*rl_prep_term_function) (_rl_meta_flag);
+
+#if defined (HANDLE_SIGNALS)
+ rl_set_signals ();
+#endif
+ }
+
+ readline_internal_setup ();
+}
+
+/* Install a readline handler, set up the terminal, and issue the prompt. */
+void
+rl_callback_handler_install (prompt, linefunc)
+ const char *prompt;
+ rl_vcpfunc_t *linefunc;
+{
+ rl_set_prompt (prompt);
+ RL_SETSTATE (RL_STATE_CALLBACK);
+ rl_linefunc = linefunc;
+ _rl_callback_newline ();
+}
+
+/* Read one character, and dispatch to the handler if it ends the line. */
+void
+rl_callback_read_char ()
+{
+ char *line;
+ int eof, jcode;
+ static procenv_t olevel;
+
+ if (rl_linefunc == NULL)
+ {
+ fprintf (stderr, "readline: readline_callback_read_char() called with no handler!\r\n");
+ abort ();
+ }
+
+ 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;
+ }
+
+ do
+ {
+ 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;
+ }
+
+ if (rl_done)
+ {
+ line = readline_internal_teardown (eof);
+
+ if (rl_deprep_term_function)
+ (*rl_deprep_term_function) ();
+#if defined (HANDLE_SIGNALS)
+ rl_clear_signals ();
+#endif
+ in_handler = 0;
+ (*rl_linefunc) (line);
+
+ /* If the user did not clear out the line, do it for him. */
+ if (rl_line_buffer[0])
+ _rl_init_line_state ();
+
+ /* Redisplay the prompt if readline_handler_{install,remove}
+ not called. */
+ if (in_handler == 0 && rl_linefunc)
+ _rl_callback_newline ();
+ }
+ }
+ while (rl_pending_input || _rl_pushed_input_available () || RL_ISSTATE (RL_STATE_MACROINPUT));
+}
+
+/* Remove the handler, and make sure the terminal is in its normal state. */
+void
+rl_callback_handler_remove ()
+{
+ rl_linefunc = NULL;
+ RL_UNSETSTATE (RL_STATE_CALLBACK);
+ if (in_handler)
+ {
+ in_handler = 0;
+ 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