/* Top level stuff for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
+ 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "cli/cli-cmds.h"
#include "cli/cli-script.h"
#include "cli/cli-setshow.h"
+#include "cli/cli-decode.h"
#include "symtab.h"
#include "inferior.h"
#include <signal.h>
#include "gdb_string.h"
#include "gdb_stat.h"
#include <ctype.h>
-#ifdef UI_OUT
#include "ui-out.h"
#include "cli-out.h"
-#endif
/* Default command line prompt. This is overriden in some configs. */
/* Hooks for alternate command interfaces. */
/* Called after most modules have been initialized, but before taking users
- command file. */
+ command file.
+
+ If the UI fails to initialize and it wants GDB to continue
+ using the default UI, then it should clear this hook before returning. */
void (*init_ui_hook) (char *argv0);
int (*ui_loop_hook) (int);
/* Called instead of command_loop at top level. Can be invoked via
- return_to_top_level. */
+ throw_exception(). */
void (*command_loop_hook) (void);
#define SIGLONGJMP(buf,val) longjmp((buf), (val))
#endif
-/* Where to go for return_to_top_level. */
+/* Where to go for throw_exception(). */
static SIGJMP_BUF *catch_return;
/* Return for reason REASON to the nearest containing catch_errors(). */
NORETURN void
-return_to_top_level (enum return_reason reason)
+throw_exception (enum return_reason reason)
{
quit_flag = 0;
immediate_quit = 0;
/* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any
errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the
- function is aborted (using return_to_top_level() or zero if the
+ function is aborted (using throw_exception() or zero if the
function returns normally. Set FUNC_VAL to the value returned by
the function or 0 if the function was aborted.
/* The caller didn't request that the event be caught, relay the
event to the next containing catch_errors(). */
- return_to_top_level (caught);
+ throw_exception (caught);
}
int
/* Pass null arg rather than an empty one. */
arg = *p ? p : 0;
- /* Clear off trailing whitespace, except for set and complete command. */
+ /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
+ while the is_complete_command(cfunc) test is just plain
+ bogus. They should both be replaced by a test of the form
+ c->strip_trailing_white_space_p. */
+ /* NOTE: cagney/2002-02-02: The function.cfunc in the below
+ can't be replaced with func. This is because it is the
+ cfunc, and not the func, that has the value that the
+ is_complete_command hack is testing for. */
+ /* Clear off trailing whitespace, except for set and complete
+ command. */
if (arg
&& c->type != set_cmd
- && !is_complete_command (c->function.cfunc))
+ && !is_complete_command (c))
{
p = arg + strlen (arg) - 1;
while (p >= arg && (*p == ' ' || *p == '\t'))
}
/* If this command has been pre-hooked, run the hook first. */
- if ((c->hook_pre) && (!c->hook_in))
- {
- c->hook_in = 1; /* Prevent recursive hooking */
- execute_user_command (c->hook_pre, (char *) 0);
- c->hook_in = 0; /* Allow hook to work again once it is complete */
- }
+ execute_cmd_pre_hook (c);
if (c->flags & DEPRECATED_WARN_USER)
deprecated_cmd_warning (&line);
execute_user_command (c, arg);
else if (c->type == set_cmd || c->type == show_cmd)
do_setshow_command (arg, from_tty & caution, c);
- else if (c->function.cfunc == NO_FUNCTION)
+ else if (!cmd_func_p (c))
error ("That is not a command, just a help topic.");
else if (call_command_hook)
call_command_hook (c, arg, from_tty & caution);
else
- (*c->function.cfunc) (arg, from_tty & caution);
+ cmd_func (c, arg, from_tty & caution);
/* If this command has been post-hooked, run the hook last. */
- if ((c->hook_post) && (!c->hook_in))
- {
- c->hook_in = 1; /* Prevent recursive hooking */
- execute_user_command (c->hook_post, (char *) 0);
- c->hook_in = 0; /* allow hook to work again once it is complete */
- }
+ execute_cmd_post_hook (c);
}
character position to be off, since the newline we read from
the user is not accounted for. */
fputs_unfiltered (prompt_arg, gdb_stdout);
- /* OBSOLETE #ifdef MPW */
- /* OBSOLETE Move to a new line so the entered line doesn't have a prompt */
- /* OBSOLETE on the front of it. */
- /* OBSOLETE fputs_unfiltered ("\n", gdb_stdout); */
- /* OBSOLETE #endif *//* MPW */
gdb_flush (gdb_stdout);
}
static int history_size;
static char *history_filename;
+/* This is like readline(), but it has some gdb-specific behavior.
+ gdb can use readline in both the synchronous and async modes during
+ a single gdb invocation. At the ordinary top-level prompt we might
+ be using the async readline. That means we can't use
+ rl_pre_input_hook, since it doesn't work properly in async mode.
+ However, for a secondary prompt (" >", such as occurs during a
+ `define'), gdb just calls readline() directly, running it in
+ synchronous mode. So for operate-and-get-next to work in this
+ situation, we have to switch the hooks around. That is what
+ gdb_readline_wrapper is for. */
+char *
+gdb_readline_wrapper (char *prompt)
+{
+ /* Set the hook that works in this case. */
+ if (event_loop_p && after_char_processing_hook)
+ {
+ rl_pre_input_hook = (Function *) after_char_processing_hook;
+ after_char_processing_hook = NULL;
+ }
+
+ return readline (prompt);
+}
+
\f
#ifdef STOP_SIGNAL
static void
#endif
}
\f
+/* The current saved history number from operate-and-get-next.
+ This is -1 if not valid. */
+static int operate_saved_history = -1;
+
+/* This is put on the appropriate hook and helps operate-and-get-next
+ do its work. */
+void
+gdb_rl_operate_and_get_next_completion (void)
+{
+ int delta = where_history () - operate_saved_history;
+ /* The `key' argument to rl_get_previous_history is ignored. */
+ rl_get_previous_history (delta, 0);
+ operate_saved_history = -1;
+
+ /* readline doesn't automatically update the display for us. */
+ rl_redisplay ();
+
+ after_char_processing_hook = NULL;
+ rl_pre_input_hook = NULL;
+}
+
+/* This is a gdb-local readline command handler. It accepts the
+ current command line (like RET does) and, if this command was taken
+ from the history, arranges for the next command in the history to
+ appear on the command line when the prompt returns.
+ We ignore the arguments. */
+static int
+gdb_rl_operate_and_get_next (int count, int key)
+{
+ int where;
+
+ if (event_loop_p)
+ {
+ /* Use the async hook. */
+ after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
+ }
+ else
+ {
+ /* This hook only works correctly when we are using the
+ synchronous readline. */
+ rl_pre_input_hook = (Function *) gdb_rl_operate_and_get_next_completion;
+ }
+
+ /* Find the current line, and find the next line to use. */
+ where = where_history();
+
+ /* FIXME: kettenis/20020817: max_input_history is renamed into
+ history_max_entries in readline-4.2. When we do a new readline
+ import, we should probably change it here too, even though
+ readline maintains backwards compatibility for now by still
+ defining max_input_history. */
+ if ((history_is_stifled () && (history_length >= max_input_history)) ||
+ (where >= history_length - 1))
+ operate_saved_history = where;
+ else
+ operate_saved_history = where + 1;
+
+ return rl_newline (1, key);
+}
+\f
/* Read one line from the command input stream `instream'
into the local static buffer `linebuffer' (whose current length
is `linelength').
}
else if (command_editing_p && instream == stdin && ISATTY (instream))
{
- rl = readline (local_prompt);
+ rl = gdb_readline_wrapper (local_prompt);
}
else
{
program to parse, and is just canonical program name and version
number, which starts after last space. */
-#ifdef MI_OUT
- /* Print it console style until a format is defined */
- fprintf_filtered (stream, "GNU gdb %s (MI_OUT)\n", version);
-#else
fprintf_filtered (stream, "GNU gdb %s\n", version);
-#endif
/* Second line is a copyright notice. */
- fprintf_filtered (stream, "Copyright 2001 Free Software Foundation, Inc.\n");
+ fprintf_filtered (stream, "Copyright 2002 Free Software Foundation, Inc.\n");
/* Following the copyright is a brief statement that the program is
free software, that users are free to copy and change it on
/* formatted prompt */
{
char fmt[40], *promptp, *outp, *tmp;
- value_ptr arg_val;
+ struct value *arg_val;
DOUBLEST doubleval;
LONGEST longval;
CORE_ADDR addrval;
if (*promptp != gdb_prompt_escape)
error ("Syntax error at prompt position %d",
- promptp - local_prompt);
+ (int) (promptp - local_prompt));
else
{
promptp++; /* skip second escape char */
break; /* void type -- no output */
default:
error ("bad data type at prompt position %d",
- promptp - local_prompt);
+ (int) (promptp - local_prompt));
break;
}
outp += strlen (outp);
value of that expression. */
if (args)
{
- value_ptr val = parse_and_eval (args);
+ struct value *val = parse_and_eval (args);
exit_code = (int) value_as_long (val);
}
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
rl_readline_name = "gdb";
+ /* The name for this defun comes from Bash, where it originated.
+ 15 is Control-o, the same binding this function has in Bash. */
+ rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
+
/* The set prompt command is different depending whether or not the
async version is run. NOTE: this difference is going to
disappear as we make the event loop be the default engine of
(char *) &new_async_prompt, "Set gdb's prompt",
&setlist);
add_show_from_set (c, &showlist);
- c->function.sfunc = set_async_prompt;
+ set_cmd_sfunc (c, set_async_prompt);
}
add_show_from_set
EMACS-like or VI-like commands like control-P or ESC.", &setlist);
add_show_from_set (c, &showlist);
- c->function.sfunc = set_async_editing_command;
+ set_cmd_sfunc (c, set_async_editing_command);
}
add_show_from_set
&showhistlist);
c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size,
- "Set the size of the command history, \n\
+ "Set the size of the command history,\n\
ie. the number of previous commands to keep a record of.", &sethistlist);
add_show_from_set (c, &showhistlist);
- c->function.sfunc = set_history_size_command;
+ set_cmd_sfunc (c, set_history_size_command);
c = add_set_cmd ("filename", no_class, var_filename,
(char *) &history_filename,
"Set the filename in which to record the command history\n\
- (the list of previous commands of which a record is kept).", &sethistlist);
- c->completer = filename_completer;
+(the list of previous commands of which a record is kept).", &sethistlist);
+ set_cmd_completer (c, filename_completer);
add_show_from_set (c, &showhistlist);
add_show_from_set
2 == output annotated suitably for use by programs that control GDB.",
&setlist);
add_show_from_set (c, &showlist);
- c->function.sfunc = set_async_annotation_level;
+ set_cmd_sfunc (c, set_async_annotation_level);
}
if (event_loop_p)
{
set_language (language_c);
expected_language = current_language; /* don't warn about the change. */
-#ifdef UI_OUT
+ /* Allow another UI to initialize. If the UI fails to initialize, and
+ it wants GDB to revert to the CLI, it should clear init_ui_hook. */
+ if (init_ui_hook)
+ init_ui_hook (argv0);
+
/* Install the default UI */
if (!init_ui_hook)
{
exit (1);
}
}
-#endif
-
- if (init_ui_hook)
- init_ui_hook (argv0);
}
projects / deliverable / binutils-gdb.git / blobdiff