int xgdb_verbose;
/* gdb prints this when reading a command interactively */
-static char *prompt;
+static char *gdb_prompt_string; /* the global prompt string */
+extern char *get_prompt PARAMS((void)); /* access function for prompt string */
/* Buffer used for reading command lines, and the size
allocated for it so far. */
cleanups = make_cleanup ((make_cleanup_func) source_cleanup, instream);
instream = stream;
- command_loop ();
+ command_loop ();
do_cleanups (cleanups);
}
\f
not the async version is run. NOTE: in the future we plan to make
the event loop be the default engine of gdb, and this difference
will disappear. */
- if (async_hook)
+ if (async_p)
async_init_signals ();
else
- init_signals ();
+ init_signals ();
/* We need a default language for parsing expressions, so simple things like
"set width 0" won't fail if no language is explicitly set in a config file
set_language (language_c);
expected_language = current_language; /* don't warn about the change. */
+ /* All the interpreters should have had a look at things by now.
+ Initialize the selected interpreter. */
if (init_ui_hook)
init_ui_hook (argv0);
}
extern int insert_mode;
#endif
if (window_hook && instream == stdin)
- (*window_hook) (instream, prompt);
+ (*window_hook) (instream, get_prompt ());
quit_flag = 0;
if (instream == stdin && stdin_is_tty)
insert_mode = 0;
#endif
/* Get a command-line. This calls the readline package. */
- command = command_line_input (instream == stdin ? prompt : (char *) NULL,
+ command = command_line_input (instream == stdin ?
+ get_prompt () : (char *) NULL,
instream == stdin, "prompt");
#if defined(TUI)
insert_mode = 0;
}
}
-\f
-/* Commands call this if they do not want to be repeated by null lines. */
-
-void
-dont_repeat ()
-{
- if (server_command)
- return;
-
- /* If we aren't reading from standard input, we are saving the last
- thing read from stdin in line and don't want to delete it. Null lines
- won't repeat here in any case. */
- if (instream == stdin)
- *line = 0;
-}
-\f
-/* Read a line from the stream "instream" without command line editing.
-
- It prints PRROMPT once at the start.
- Action is compatible with "readline", e.g. space for the result is
- malloc'd and should be freed by the caller.
-
- A NULL return means end of file. */
-char *
-gdb_readline (prrompt)
- char *prrompt;
-{
- int c;
- char *result;
- int input_index = 0;
- int result_size = 80;
-
- if (prrompt)
- {
- /* Don't use a _filtered function here. It causes the assumed
- character position to be off, since the newline we read from
- the user is not accounted for. */
- fputs_unfiltered (prrompt, gdb_stdout);
-#ifdef MPW
- /* Move to a new line so the entered line doesn't have a prompt
- on the front of it. */
- fputs_unfiltered ("\n", gdb_stdout);
-#endif /* MPW */
- gdb_flush (gdb_stdout);
- }
-
- result = (char *) xmalloc (result_size);
-
- while (1)
- {
- /* Read from stdin if we are executing a user defined command.
- This is the right thing for prompt_for_continue, at least. */
- c = fgetc (instream ? instream : stdin);
-
- if (c == EOF)
- {
- if (input_index > 0)
- /* The last line does not end with a newline. Return it, and
- if we are called again fgetc will still return EOF and
- we'll return NULL then. */
- break;
- free (result);
- return NULL;
- }
-
- if (c == '\n')
-#ifndef CRLF_SOURCE_FILES
- break;
-#else
- {
- if (input_index > 0 && result[input_index - 1] == '\r')
- input_index--;
- break;
- }
-#endif
-
- result[input_index++] = c;
- while (input_index >= result_size)
- {
- result_size *= 2;
- result = (char *) xrealloc (result, result_size);
- }
- }
-
- result[input_index++] = '\0';
- return result;
-}
-
-/* Variables which control command line editing and history
- substitution. These variables are given default values at the end
- of this file. */
-static int command_editing_p;
-/* NOTE 1999-04-29: This variable will be static again, once we modify
- gdb to use the event loop as the default command loop and we merge
- event-top.c into this file, top.c */
-/* static */ int history_expansion_p;
-static int write_history_p;
-static int history_size;
-static char *history_filename;
-
-/* readline uses the word breaks for two things:
- (1) In figuring out where to point the TEXT parameter to the
- rl_completion_entry_function. Since we don't use TEXT for much,
- it doesn't matter a lot what the word breaks are for this purpose, but
- it does affect how much stuff M-? lists.
- (2) If one of the matches contains a word break character, readline
- will quote it. That's why we switch between
- gdb_completer_word_break_characters and
- gdb_completer_command_word_break_characters. I'm not sure when
- we need this behavior (perhaps for funky characters in C++ symbols?). */
-
-/* Variables which are necessary for fancy command line editing. */
-char *gdb_completer_word_break_characters =
- " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
-
-/* When completing on command names, we remove '-' from the list of
- word break characters, since we use it in command names. If the
- readline library sees one in any of the current completion strings,
- it thinks that the string needs to be quoted and automatically supplies
- a leading quote. */
-char *gdb_completer_command_word_break_characters =
- " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
-
-/* Characters that can be used to quote completion strings. Note that we
- can't include '"' because the gdb C parser treats such quoted sequences
- as strings. */
-char *gdb_completer_quote_characters =
- "'";
-
-/* Functions that are used as part of the fancy command line editing. */
-
-/* This can be used for functions which don't want to complete on symbols
- but don't want to complete on anything else either. */
-/* ARGSUSED */
-char **
-noop_completer (text, prefix)
- char *text;
- char *prefix;
-{
- return NULL;
-}
-
-/* Complete on filenames. */
-char **
-filename_completer (text, word)
- char *text;
- char *word;
-{
- /* From readline. */
- extern char *filename_completion_function PARAMS ((char *, int));
- int subsequent_name;
- char **return_val;
- int return_val_used;
- int return_val_alloced;
-
- return_val_used = 0;
- /* Small for testing. */
- return_val_alloced = 1;
- return_val = (char **) xmalloc (return_val_alloced * sizeof (char *));
-
- subsequent_name = 0;
- while (1)
- {
- char *p;
- p = filename_completion_function (text, subsequent_name);
- if (return_val_used >= return_val_alloced)
- {
- return_val_alloced *= 2;
- return_val =
- (char **) xrealloc (return_val,
- return_val_alloced * sizeof (char *));
- }
- if (p == NULL)
- {
- return_val[return_val_used++] = p;
- break;
- }
- /* Like emacs, don't complete on old versions. Especially useful
- in the "source" command. */
- if (p[strlen (p) - 1] == '~')
- continue;
-
- {
- char *q;
- if (word == text)
- /* Return exactly p. */
- return_val[return_val_used++] = p;
- else if (word > text)
- {
- /* Return some portion of p. */
- q = xmalloc (strlen (p) + 5);
- strcpy (q, p + (word - text));
- return_val[return_val_used++] = q;
- free (p);
- }
- else
- {
- /* Return some of TEXT plus p. */
- q = xmalloc (strlen (p) + (text - word) + 5);
- strncpy (q, word, text - word);
- q[text - word] = '\0';
- strcat (q, p);
- return_val[return_val_used++] = q;
- free (p);
- }
- }
- subsequent_name = 1;
- }
-#if 0
- /* There is no way to do this just long enough to affect quote inserting
- without also affecting the next completion. This should be fixed in
- readline. FIXME. */
- /* Insure that readline does the right thing
- with respect to inserting quotes. */
- rl_completer_word_break_characters = "";
-#endif
- return return_val;
-}
-
-/* Here are some useful test cases for completion. FIXME: These should
- be put in the test suite. They should be tested with both M-? and TAB.
-
- "show output-" "radix"
- "show output" "-radix"
- "p" ambiguous (commands starting with p--path, print, printf, etc.)
- "p " ambiguous (all symbols)
- "info t foo" no completions
- "info t " no completions
- "info t" ambiguous ("info target", "info terminal", etc.)
- "info ajksdlfk" no completions
- "info ajksdlfk " no completions
- "info" " "
- "info " ambiguous (all info commands)
- "p \"a" no completions (string constant)
- "p 'a" ambiguous (all symbols starting with a)
- "p b-a" ambiguous (all symbols starting with a)
- "p b-" ambiguous (all symbols)
- "file Make" "file" (word break hard to screw up here)
- "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
- */
-
-/* Generate completions one by one for the completer. Each time we are
- called return another potential completion to the caller.
- line_completion just completes on commands or passes the buck to the
- command's completer function, the stuff specific to symbol completion
- is in make_symbol_completion_list.
-
- TEXT is the caller's idea of the "word" we are looking at.
-
- MATCHES is the number of matches that have currently been collected from
- calling this completion function. When zero, then we need to initialize,
- otherwise the initialization has already taken place and we can just
- return the next potential completion string.
-
- LINE_BUFFER is available to be looked at; it contains the entire text
- of the line. POINT is the offset in that line of the cursor. You
- should pretend that the line ends at POINT.
-
- Returns NULL if there are no more completions, else a pointer to a string
- which is a possible completion, it is the caller's responsibility to
- free the string. */
-
-static char *
-line_completion_function (text, matches, line_buffer, point)
- char *text;
- int matches;
- char *line_buffer;
- int point;
-{
- static char **list = (char **)NULL; /* Cache of completions */
- static int index; /* Next cached completion */
- char *output = NULL;
- char *tmp_command, *p;
- /* Pointer within tmp_command which corresponds to text. */
- char *word;
- struct cmd_list_element *c, *result_list;
-
- if (matches == 0)
- {
- /* The caller is beginning to accumulate a new set of completions, so
- we need to find all of them now, and cache them for returning one at
- a time on future calls. */
-
- if (list)
- {
- /* Free the storage used by LIST, but not by the strings inside.
- This is because rl_complete_internal () frees the strings. */
- free ((PTR)list);
- }
- list = 0;
- index = 0;
-
- /* Choose the default set of word break characters to break completions.
- If we later find out that we are doing completions on command strings
- (as opposed to strings supplied by the individual command completer
- functions, which can be any string) then we will switch to the
- special word break set for command strings, which leaves out the
- '-' character used in some commands. */
-
- rl_completer_word_break_characters =
- gdb_completer_word_break_characters;
-
- /* Decide whether to complete on a list of gdb commands or on symbols. */
- tmp_command = (char *) alloca (point + 1);
- p = tmp_command;
-
- strncpy (tmp_command, line_buffer, point);
- tmp_command[point] = '\0';
- /* Since text always contains some number of characters leading up
- to point, we can find the equivalent position in tmp_command
- by subtracting that many characters from the end of tmp_command. */
- word = tmp_command + point - strlen (text);
-
- if (point == 0)
- {
- /* An empty line we want to consider ambiguous; that is, it
- could be any command. */
- c = (struct cmd_list_element *) -1;
- result_list = 0;
- }
- else
- {
- c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
- }
-
- /* Move p up to the next interesting thing. */
- while (*p == ' ' || *p == '\t')
- {
- p++;
- }
-
- if (!c)
- {
- /* It is an unrecognized command. So there are no
- possible completions. */
- list = NULL;
- }
- else if (c == (struct cmd_list_element *) -1)
- {
- char *q;
-
- /* lookup_cmd_1 advances p up to the first ambiguous thing, but
- doesn't advance over that thing itself. Do so now. */
- q = p;
- while (*q && (isalnum (*q) || *q == '-' || *q == '_'))
- ++q;
- if (q != tmp_command + point)
- {
- /* There is something beyond the ambiguous
- command, so there are no possible completions. For
- example, "info t " or "info t foo" does not complete
- to anything, because "info t" can be "info target" or
- "info terminal". */
- list = NULL;
- }
- else
- {
- /* We're trying to complete on the command which was ambiguous.
- This we can deal with. */
- if (result_list)
- {
- list = complete_on_cmdlist (*result_list->prefixlist, p,
- word);
- }
- else
- {
- list = complete_on_cmdlist (cmdlist, p, word);
- }
- /* Insure that readline does the right thing with respect to
- inserting quotes. */
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
- }
- }
- else
- {
- /* We've recognized a full command. */
-
- if (p == tmp_command + point)
- {
- /* There is no non-whitespace in the line beyond the command. */
-
- if (p[-1] == ' ' || p[-1] == '\t')
- {
- /* The command is followed by whitespace; we need to complete
- on whatever comes after command. */
- if (c->prefixlist)
- {
- /* It is a prefix command; what comes after it is
- a subcommand (e.g. "info "). */
- list = complete_on_cmdlist (*c->prefixlist, p, word);
-
- /* Insure that readline does the right thing
- with respect to inserting quotes. */
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
- }
- else if (c->enums)
- {
- list = complete_on_enum (c->enums, p, word);
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
- }
- else
- {
- /* It is a normal command; what comes after it is
- completed by the command's completer function. */
- list = (*c->completer) (p, word);
- }
- }
- else
- {
- /* The command is not followed by whitespace; we need to
- complete on the command itself. e.g. "p" which is a
- command itself but also can complete to "print", "ptype"
- etc. */
- char *q;
-
- /* Find the command we are completing on. */
- q = p;
- while (q > tmp_command)
- {
- if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_')
- --q;
- else
- break;
- }
-
- list = complete_on_cmdlist (result_list, q, word);
-
- /* Insure that readline does the right thing
- with respect to inserting quotes. */
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
- }
- }
- else
- {
- /* There is non-whitespace beyond the command. */
-
- if (c->prefixlist && !c->allow_unknown)
- {
- /* It is an unrecognized subcommand of a prefix command,
- e.g. "info adsfkdj". */
- list = NULL;
- }
- else if (c->enums)
- {
- list = complete_on_enum (c->enums, p, word);
- }
- else
- {
- /* It is a normal command. */
- list = (*c->completer) (p, word);
- }
- }
- }
- }
-
- /* If we found a list of potential completions during initialization then
- dole them out one at a time. The vector of completions is NULL
- terminated, so after returning the last one, return NULL (and continue
- to do so) each time we are called after that, until a new list is
- available. */
-
- if (list)
- {
- output = list[index];
- if (output)
- {
- index++;
- }
- }
-
-#if 0
- /* Can't do this because readline hasn't yet checked the word breaks
- for figuring out whether to insert a quote. */
- if (output == NULL)
- /* Make sure the word break characters are set back to normal for the
- next time that readline tries to complete something. */
- rl_completer_word_break_characters =
- gdb_completer_word_break_characters;
-#endif
-
- return (output);
-}
-
-/* Line completion interface function for readline. */
-
-static char *
-readline_line_completion_function (text, matches)
- char *text;
- int matches;
-{
- return line_completion_function (text, matches, rl_line_buffer, rl_point);
-}
-
-/* Skip over a possibly quoted word (as defined by the quote characters
- and word break characters the completer uses). Returns pointer to the
- location after the "word". */
-
-char *
-skip_quoted (str)
- char *str;
-{
- char quote_char = '\0';
- char *scan;
-
- for (scan = str; *scan != '\0'; scan++)
- {
- if (quote_char != '\0')
- {
- /* Ignore everything until the matching close quote char */
- if (*scan == quote_char)
- {
- /* Found matching close quote. */
- scan++;
- break;
- }
- }
- else if (strchr (gdb_completer_quote_characters, *scan))
- {
- /* Found start of a quoted string. */
- quote_char = *scan;
- }
- else if (strchr (gdb_completer_word_break_characters, *scan))
- {
- break;
- }
- }
- return (scan);
-}
-
-\f
-#ifdef STOP_SIGNAL
-static void
-stop_sig (signo)
-int signo;
-{
-#if STOP_SIGNAL == SIGTSTP
- signal (SIGTSTP, SIG_DFL);
- sigsetmask (0);
- kill (getpid (), SIGTSTP);
- signal (SIGTSTP, stop_sig);
-#else
- signal (STOP_SIGNAL, stop_sig);
-#endif
- printf_unfiltered ("%s", prompt);
- gdb_flush (gdb_stdout);
-
- /* Forget about any previous command -- null line now will do nothing. */
- dont_repeat ();
-}
-#endif /* STOP_SIGNAL */
-
-/* Initialize signal handlers. */
-static void
-do_nothing (signo)
-int signo;
-{
- /* Under System V the default disposition of a signal is reinstated after
- the signal is caught and delivered to an application process. On such
- systems one must restore the replacement signal handler if one wishes
- to continue handling the signal in one's program. On BSD systems this
- is not needed but it is harmless, and it simplifies the code to just do
- it unconditionally. */
- signal (signo, do_nothing);
-}
-
-static void
-init_signals ()
-{
- signal (SIGINT, request_quit);
-
- /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
- to the inferior and breakpoints will be ignored. */
-#ifdef SIGTRAP
- signal (SIGTRAP, SIG_DFL);
-#endif
-
- /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
- passed to the inferior, which we don't want. It would be
- possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
- on BSD4.3 systems using vfork, that can affect the
- GDB process as well as the inferior (the signal handling tables
- might be in memory, shared between the two). Since we establish
- a handler for SIGQUIT, when we call exec it will set the signal
- to SIG_DFL for us. */
- signal (SIGQUIT, do_nothing);
-#ifdef SIGHUP
- if (signal (SIGHUP, do_nothing) != SIG_IGN)
- signal (SIGHUP, disconnect);
-#endif
- signal (SIGFPE, float_handler);
-
-#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
- signal (SIGWINCH, SIGWINCH_HANDLER);
-#endif
-}
-\f
-/* Read one line from the command input stream `instream'
- into the local static buffer `linebuffer' (whose current length
- is `linelength').
- The buffer is made bigger as necessary.
- Returns the address of the start of the line.
-
- NULL is returned for end of file.
-
- *If* the instream == stdin & stdin is a terminal, the line read
- is copied into the file line saver (global var char *line,
- length linesize) so that it can be duplicated.
-
- This routine either uses fancy command line editing or
- simple input as the user has requested. */
-
-char *
-command_line_input (prrompt, repeat, annotation_suffix)
- char *prrompt;
- int repeat;
- char *annotation_suffix;
-{
- static char *linebuffer = 0;
- static unsigned linelength = 0;
- register char *p;
- char *p1;
- char *rl;
- char *local_prompt = prrompt;
- char *nline;
- char got_eof = 0;
-
- /* The annotation suffix must be non-NULL. */
- if (annotation_suffix == NULL)
- annotation_suffix = "";
-
- if (annotation_level > 1 && instream == stdin)
- {
- local_prompt = alloca ((prrompt == NULL ? 0 : strlen (prrompt))
- + strlen (annotation_suffix) + 40);
- if (prrompt == NULL)
- local_prompt[0] = '\0';
- else
- strcpy (local_prompt, prrompt);
- strcat (local_prompt, "\n\032\032");
- strcat (local_prompt, annotation_suffix);
- strcat (local_prompt, "\n");
- }
-
- if (linebuffer == 0)
- {
- linelength = 80;
- linebuffer = (char *) xmalloc (linelength);
- }
-
- p = linebuffer;
-
- /* Control-C quits instantly if typed while in this loop
- since it should not wait until the user types a newline. */
- immediate_quit++;
-#ifdef STOP_SIGNAL
- if (job_control)
- signal (STOP_SIGNAL, stop_sig);
-#endif
-
- while (1)
- {
- /* Make sure that all output has been output. Some machines may let
- you get away with leaving out some of the gdb_flush, but not all. */
- wrap_here ("");
- gdb_flush (gdb_stdout);
- gdb_flush (gdb_stderr);
-
- if (source_file_name != NULL)
- {
- ++source_line_number;
- sprintf (source_error,
- "%s%s:%d: Error in sourced command file:\n",
- source_pre_error,
- source_file_name,
- source_line_number);
- error_pre_print = source_error;
- }
-
- if (annotation_level > 1 && instream == stdin)
- {
- printf_unfiltered ("\n\032\032pre-");
- printf_unfiltered (annotation_suffix);
- printf_unfiltered ("\n");
- }
-
- /* Don't use fancy stuff if not talking to stdin. */
- if (readline_hook && instream == NULL)
- {
- rl = (*readline_hook) (local_prompt);
- }
- else if (command_editing_p && instream == stdin && ISATTY (instream))
- {
- rl = readline (local_prompt);
- }
- else
- {
- rl = gdb_readline (local_prompt);
- }
-
- if (annotation_level > 1 && instream == stdin)
- {
- printf_unfiltered ("\n\032\032post-");
- printf_unfiltered (annotation_suffix);
- printf_unfiltered ("\n");
- }
-
- if (!rl || rl == (char *) EOF)
- {
- got_eof = 1;
- break;
- }
- if (strlen(rl) + 1 + (p - linebuffer) > linelength)
- {
- linelength = strlen(rl) + 1 + (p - linebuffer);
- nline = (char *) xrealloc (linebuffer, linelength);
- p += nline - linebuffer;
- linebuffer = nline;
- }
- p1 = rl;
- /* Copy line. Don't copy null at end. (Leaves line alone
- if this was just a newline) */
- while (*p1)
- *p++ = *p1++;
-
- free (rl); /* Allocated in readline. */
-
- if (p == linebuffer || *(p - 1) != '\\')
- break;
-
- p--; /* Put on top of '\'. */
- local_prompt = (char *) 0;
- }
-
-#ifdef STOP_SIGNAL
- if (job_control)
- signal (STOP_SIGNAL, SIG_DFL);
-#endif
- immediate_quit--;
-
- if (got_eof)
- return NULL;
-
-#define SERVER_COMMAND_LENGTH 7
- server_command =
- (p - linebuffer > SERVER_COMMAND_LENGTH)
- && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH);
- if (server_command)
- {
- /* Note that we don't set `line'. Between this and the check in
- dont_repeat, this insures that repeating will still do the
- right thing. */
- *p = '\0';
- return linebuffer + SERVER_COMMAND_LENGTH;
- }
-
- /* Do history expansion if that is wished. */
- if (history_expansion_p && instream == stdin
- && ISATTY (instream))
- {
- char *history_value;
- int expanded;
-
- *p = '\0'; /* Insert null now. */
- expanded = history_expand (linebuffer, &history_value);
- if (expanded)
- {
- /* Print the changes. */
- printf_unfiltered ("%s\n", history_value);
-
- /* If there was an error, call this function again. */
- if (expanded < 0)
- {
- free (history_value);
- return command_line_input (prrompt, repeat, annotation_suffix);
- }
- if (strlen (history_value) > linelength)
- {
- linelength = strlen (history_value) + 1;
- linebuffer = (char *) xrealloc (linebuffer, linelength);
- }
- strcpy (linebuffer, history_value);
- p = linebuffer + strlen(linebuffer);
- free (history_value);
- }
- }
-
- /* If we just got an empty line, and that is supposed
- to repeat the previous command, return the value in the
- global buffer. */
- if (repeat && p == linebuffer)
- return line;
- for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++) ;
- if (repeat && !*p1)
- return line;
-
- *p = 0;
-
- /* Add line to history if appropriate. */
- if (instream == stdin
- && ISATTY (stdin) && *linebuffer)
- add_history (linebuffer);
-
- /* Note: lines consisting solely of comments are added to the command
- history. This is useful when you type a command, and then
- realize you don't want to execute it quite yet. You can comment
- out the command and then later fetch it from the value history
- and remove the '#'. The kill ring is probably better, but some
- people are in the habit of commenting things out. */
- if (*p1 == '#')
- *p1 = '\0'; /* Found a comment. */
-
- /* Save into global buffer if appropriate. */
- if (repeat)
- {
- if (linelength > linesize)
- {
- line = xrealloc (line, linelength);
- linesize = linelength;
- }
- strcpy (line, linebuffer);
- return line;
- }
-
- return linebuffer;
-}
-\f
-
-/* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
- code bodies. This is typically used when we encounter an "else"
- clause for an "if" command. */
-
-static void
-realloc_body_list (command, new_length)
- struct command_line *command;
- int new_length;
-{
- int n;
- struct command_line **body_list;
-
- n = command->body_count;
-
- /* Nothing to do? */
- if (new_length <= n)
- return;
-
- body_list = (struct command_line **)
- xmalloc (sizeof (struct command_line *) * new_length);
-
- memcpy (body_list, command->body_list, sizeof (struct command_line *) * n);
-
- free (command->body_list);
- command->body_list = body_list;
- command->body_count = new_length;
-}
-
-/* Read one line from the input stream. If the command is an "else" or
- "end", return such an indication to the caller. */
-
-static enum misc_command_type
-read_next_line (command)
- struct command_line **command;
-{
- char *p, *p1, *prompt_ptr, control_prompt[256];
- int i = 0;
-
- if (control_level >= 254)
- error ("Control nesting too deep!\n");
-
- /* Set a prompt based on the nesting of the control commands. */
- if (instream == stdin || (instream == 0 && readline_hook != NULL))
- {
- for (i = 0; i < control_level; i++)
- control_prompt[i] = ' ';
- control_prompt[i] = '>';
- control_prompt[i+1] = '\0';
- prompt_ptr = (char *)&control_prompt[0];
- }
- else
- prompt_ptr = NULL;
-
- p = command_line_input (prompt_ptr, instream == stdin, "commands");
-
- /* Not sure what to do here. */
- if (p == NULL)
- return end_command;
-
- /* Strip leading and trailing whitespace. */
- while (*p == ' ' || *p == '\t')
- p++;
-
- p1 = p + strlen (p);
- while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t'))
- p1--;
-
- /* Blanks and comments don't really do anything, but we need to
- distinguish them from else, end and other commands which can be
- executed. */
- if (p1 == p || p[0] == '#')
- return nop_command;
-
- /* Is this the end of a simple, while, or if control structure? */
- if (p1 - p == 3 && !strncmp (p, "end", 3))
- return end_command;
-
- /* Is the else clause of an if control structure? */
- if (p1 - p == 4 && !strncmp (p, "else", 4))
- return else_command;
-
- /* Check for while, if, break, continue, etc and build a new command
- line structure for them. */
- if (p1 - p > 5 && !strncmp (p, "while", 5))
- *command = build_command_line (while_control, p + 6);
- else if (p1 - p > 2 && !strncmp (p, "if", 2))
- *command = build_command_line (if_control, p + 3);
- else if (p1 - p == 10 && !strncmp (p, "loop_break", 10))
- {
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
- (*command)->next = NULL;
- (*command)->line = NULL;
- (*command)->control_type = break_control;
- (*command)->body_count = 0;
- (*command)->body_list = NULL;
- }
- else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13))
- {
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
- (*command)->next = NULL;
- (*command)->line = NULL;
- (*command)->control_type = continue_control;
- (*command)->body_count = 0;
- (*command)->body_list = NULL;
- }
- else
- {
- /* A normal command. */
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
- (*command)->next = NULL;
- (*command)->line = savestring (p, p1 - p);
- (*command)->control_type = simple_control;
- (*command)->body_count = 0;
- (*command)->body_list = NULL;
- }
-
- /* Nothing special. */
- return ok_command;
-}
-
-/* Recursively read in the control structures and create a command_line
- structure from them.
-
- The parent_control parameter is the control structure in which the
- following commands are nested. */
-
-static enum command_control_type
-recurse_read_control_structure (current_cmd)
- struct command_line *current_cmd;
-{
- int current_body, i;
- enum misc_command_type val;
- enum command_control_type ret;
- struct command_line **body_ptr, *child_tail, *next;
-
- child_tail = NULL;
- current_body = 1;
-
- /* Sanity checks. */
- if (current_cmd->control_type == simple_control)
- {
- error ("Recursed on a simple control type\n");
- return invalid_control;
- }
-
- if (current_body > current_cmd->body_count)
- {
- error ("Allocated body is smaller than this command type needs\n");
- return invalid_control;
- }
-
- /* Read lines from the input stream and build control structures. */
- while (1)
- {
- dont_repeat ();
-
- next = NULL;
- val = read_next_line (&next);
-
- /* Just skip blanks and comments. */
- if (val == nop_command)
- continue;
-
- if (val == end_command)
- {
- if (current_cmd->control_type == while_control
- || current_cmd->control_type == if_control)
- {
- /* Success reading an entire control structure. */
- ret = simple_control;
- break;
- }
- else
- {
- ret = invalid_control;
- break;
- }
- }
-
- /* Not the end of a control structure. */
- if (val == else_command)
- {
- if (current_cmd->control_type == if_control
- && current_body == 1)
- {
- realloc_body_list (current_cmd, 2);
- current_body = 2;
- child_tail = NULL;
- continue;
- }
- else
- {
- ret = invalid_control;
- break;
- }
- }
-
- if (child_tail)
- {
- child_tail->next = next;
- }
- else
- {
- body_ptr = current_cmd->body_list;
- for (i = 1; i < current_body; i++)
- body_ptr++;
-
- *body_ptr = next;
-
- }
-
- child_tail = next;
-
- /* If the latest line is another control structure, then recurse
- on it. */
- if (next->control_type == while_control
- || next->control_type == if_control)
- {
- control_level++;
- ret = recurse_read_control_structure (next);
- control_level--;
-
- if (ret != simple_control)
- break;
- }
- }
-
- dont_repeat ();
-
- return ret;
-}
-
-/* Read lines from the input stream and accumulate them in a chain of
- struct command_line's, which is then returned. For input from a
- terminal, the special command "end" is used to mark the end of the
- input, and is not included in the returned chain of commands. */
-
-#define END_MESSAGE "End with a line saying just \"end\"."
-
-struct command_line *
-read_command_lines (prompt, from_tty)
-char *prompt;
-int from_tty;
-{
- struct command_line *head, *tail, *next;
- struct cleanup *old_chain;
- enum command_control_type ret;
- enum misc_command_type val;
-
- control_level = 0;
- if (readline_begin_hook)
- {
- /* Note - intentional to merge messages with no newline */
- (*readline_begin_hook) ("%s %s\n", prompt, END_MESSAGE);
- }
- else if (from_tty && input_from_terminal_p ())
- {
- printf_unfiltered ("%s\n%s\n", prompt, END_MESSAGE);
- gdb_flush (gdb_stdout);
- }
-
- head = tail = NULL;
- old_chain = NULL;
-
- while (1)
- {
- val = read_next_line (&next);
-
- /* Ignore blank lines or comments. */
- if (val == nop_command)
- continue;
-
- if (val == end_command)
- {
- ret = simple_control;
- break;
- }
-
- if (val != ok_command)
- {
- ret = invalid_control;
- break;
- }
-
- if (next->control_type == while_control
- || next->control_type == if_control)
- {
- control_level++;
- ret = recurse_read_control_structure (next);
- control_level--;
-
- if (ret == invalid_control)
- break;
- }
-
- if (tail)
- {
- tail->next = next;
- }
- else
- {
- head = next;
- old_chain = make_cleanup ((make_cleanup_func) free_command_lines,
- &head);
- }
- tail = next;
- }
-
- dont_repeat ();
-
- if (head)
- {
- if (ret != invalid_control)
- {
- discard_cleanups (old_chain);
- }
- else
- do_cleanups (old_chain);
- }
-
- if (readline_end_hook)
- {
- (*readline_end_hook) ();
- }
- return (head);
-}
-
-/* Free a chain of struct command_line's. */
-
-void
-free_command_lines (lptr)
- struct command_line **lptr;
-{
- register struct command_line *l = *lptr;
- register struct command_line *next;
- struct command_line **blist;
- int i;
-
- while (l)
- {
- if (l->body_count > 0)
- {
- blist = l->body_list;
- for (i = 0; i < l->body_count; i++, blist++)
- free_command_lines (blist);
- }
- next = l->next;
- free (l->line);
- free ((PTR)l);
- l = next;
- }
-}
-\f
-/* Add an element to the list of info subcommands. */
-
-void
-add_info (name, fun, doc)
- char *name;
- void (*fun) PARAMS ((char *, int));
- char *doc;
-{
- add_cmd (name, no_class, fun, doc, &infolist);
-}
-
-/* Add an alias to the list of info subcommands. */
-
-void
-add_info_alias (name, oldname, abbrev_flag)
- char *name;
- char *oldname;
- int abbrev_flag;
-{
- add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
-}
-
-/* The "info" command is defined as a prefix, with allow_unknown = 0.
- Therefore, its own definition is called only for "info" with no args. */
-
-/* ARGSUSED */
-static void
-info_command (arg, from_tty)
- char *arg;
- int from_tty;
-{
- printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
- help_list (infolist, "info ", -1, gdb_stdout);
-}
-
-/* The "complete" command is used by Emacs to implement completion. */
-
-/* ARGSUSED */
-static void
-complete_command (arg, from_tty)
- char *arg;
- int from_tty;
-{
- int i;
- int argpoint;
- char *completion;
-
- dont_repeat ();
-
- if (arg == NULL)
- arg = "";
- argpoint = strlen (arg);
-
- for (completion = line_completion_function (arg, i = 0, arg, argpoint);
- completion;
- completion = line_completion_function (arg, ++i, arg, argpoint))
- {
- printf_unfiltered ("%s\n", completion);
- free (completion);
- }
-}
-
-/* The "show" command with no arguments shows all the settings. */
-
-/* ARGSUSED */
-static void
-show_command (arg, from_tty)
- char *arg;
- int from_tty;
-{
- cmd_show_list (showlist, from_tty, "");
-}
-\f
-/* Add an element to the list of commands. */
-
-void
-add_com (name, class, fun, doc)
- char *name;
- enum command_class class;
- void (*fun) PARAMS ((char *, int));
- char *doc;
-{
- add_cmd (name, class, fun, doc, &cmdlist);
-}
-
-/* Add an alias or abbreviation command to the list of commands. */
-
-void
-add_com_alias (name, oldname, class, abbrev_flag)
- char *name;
- char *oldname;
- enum command_class class;
- int abbrev_flag;
-{
- add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
-}
-
-void
-error_no_arg (why)
- char *why;
-{
- error ("Argument required (%s).", why);
-}
-
-/* ARGSUSED */
-static void
-help_command (command, from_tty)
- char *command;
- int from_tty; /* Ignored */
-{
- help_cmd (command, gdb_stdout);
-}
-\f
-static void
-validate_comname (comname)
- char *comname;
-{
- register char *p;
-
- if (comname == 0)
- error_no_arg ("name of command to define");
-
- p = comname;
- while (*p)
- {
- if (!isalnum(*p) && *p != '-' && *p != '_')
- error ("Junk in argument list: \"%s\"", p);
- p++;
- }
-}
-
-/* This is just a placeholder in the command data structures. */
-static void
-user_defined_command (ignore, from_tty)
- char *ignore;
- int from_tty;
-{
-}
-
-static void
-define_command (comname, from_tty)
- char *comname;
- int from_tty;
-{
- register struct command_line *cmds;
- register struct cmd_list_element *c, *newc, *hookc = 0;
- char *tem = comname;
- char tmpbuf[128];
-#define HOOK_STRING "hook-"
-#define HOOK_LEN 5
-
- validate_comname (comname);
-
- /* Look it up, and verify that we got an exact match. */
- c = lookup_cmd (&tem, cmdlist, "", -1, 1);
- if (c && !STREQ (comname, c->name))
- c = 0;
-
- if (c)
- {
- if (c->class == class_user || c->class == class_alias)
- tem = "Redefine command \"%s\"? ";
- else
- tem = "Really redefine built-in command \"%s\"? ";
- if (!query (tem, c->name))
- error ("Command \"%s\" not redefined.", c->name);
- }
-
- /* If this new command is a hook, then mark the command which it
- is hooking. Note that we allow hooking `help' commands, so that
- we can hook the `stop' pseudo-command. */
-
- if (!strncmp (comname, HOOK_STRING, HOOK_LEN))
- {
- /* Look up cmd it hooks, and verify that we got an exact match. */
- tem = comname+HOOK_LEN;
- hookc = lookup_cmd (&tem, cmdlist, "", -1, 0);
- if (hookc && !STREQ (comname+HOOK_LEN, hookc->name))
- hookc = 0;
- if (!hookc)
- {
- warning ("Your new `%s' command does not hook any existing command.",
- comname);
- if (!query ("Proceed? "))
- error ("Not confirmed.");
- }
- }
-
- comname = savestring (comname, strlen (comname));
-
- /* If the rest of the commands will be case insensitive, this one
- should behave in the same manner. */
- for (tem = comname; *tem; tem++)
- if (isupper(*tem)) *tem = tolower(*tem);
-
- sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname);
- cmds = read_command_lines (tmpbuf, from_tty);
-
- if (c && c->class == class_user)
- free_command_lines (&c->user_commands);
-
- newc = add_cmd (comname, class_user, user_defined_command,
- (c && c->class == class_user)
- ? c->doc : savestring ("User-defined.", 13), &cmdlist);
- newc->user_commands = cmds;
-
- /* If this new command is a hook, then mark both commands as being
- tied. */
- if (hookc)
- {
- hookc->hook = newc; /* Target gets hooked. */
- newc->hookee = hookc; /* We are marked as hooking target cmd. */
- }
-}
-
-static void
-document_command (comname, from_tty)
- char *comname;
- int from_tty;
-{
- struct command_line *doclines;
- register struct cmd_list_element *c;
- char *tem = comname;
- char tmpbuf[128];
-
- validate_comname (comname);
-
- c = lookup_cmd (&tem, cmdlist, "", 0, 1);
-
- if (c->class != class_user)
- error ("Command \"%s\" is built-in.", comname);
-
- sprintf (tmpbuf, "Type documentation for \"%s\".", comname);
- doclines = read_command_lines (tmpbuf, from_tty);
-
- if (c->doc) free (c->doc);
-
- {
- register struct command_line *cl1;
- register int len = 0;
-
- for (cl1 = doclines; cl1; cl1 = cl1->next)
- len += strlen (cl1->line) + 1;
-
- c->doc = (char *) xmalloc (len + 1);
- *c->doc = 0;
-
- for (cl1 = doclines; cl1; cl1 = cl1->next)
- {
- strcat (c->doc, cl1->line);
- if (cl1->next)
- strcat (c->doc, "\n");
- }
- }
-
- free_command_lines (&doclines);
-}
-\f
-/* Print the GDB banner. */
-void
-print_gdb_version (stream)
- GDB_FILE *stream;
-{
- /* From GNU coding standards, first line is meant to be easy for a
- program to parse, and is just canonical program name and version
- number, which starts after last space. */
-
- fprintf_filtered (stream, "GNU gdb %s\n", version);
-
- /* Second line is a copyright notice. */
-
- fprintf_filtered (stream, "Copyright 1998 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
- certain conditions, that it is covered by the GNU GPL, and that
- there is no warranty. */
-
- fprintf_filtered (stream, "\
-GDB is free software, covered by the GNU General Public License, and you are\n\
-welcome to change it and/or distribute copies of it under certain conditions.\n\
-Type \"show copying\" to see the conditions.\n\
-There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
-
- /* After the required info we print the configuration information. */
-
- fprintf_filtered (stream, "This GDB was configured as \"");
- if (!STREQ (host_name, target_name))
- {
- fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name);
- }
- else
- {
- fprintf_filtered (stream, "%s", host_name);
- }
- fprintf_filtered (stream, "\".");
-}
-
-/* ARGSUSED */
-static void
-show_version (args, from_tty)
- char *args;
- int from_tty;
-{
- immediate_quit++;
- print_gdb_version (gdb_stdout);
- printf_filtered ("\n");
- immediate_quit--;
-}
-\f
-/* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
- is obsolete. */
-
-void
-print_prompt ()
-{
- printf_unfiltered ("%s", prompt);
- gdb_flush (gdb_stdout);
-}
-
-/* This replaces the above for the frontends: it returns a pointer
- to the prompt. */
-char *
-get_prompt ()
-{
- return prompt;
-}
-
-void
-set_prompt (s)
- char *s;
-{
-/* ??rehrauer: I don't know why this fails, since it looks as though
- assignments to prompt are wrapped in calls to savestring...
- if (prompt != NULL)
- free (prompt);
-*/
- prompt = savestring (s, strlen (s));
-}
-
-\f
-/* If necessary, make the user confirm that we should quit. Return
- non-zero if we should quit, zero if we shouldn't. */
-
-int
-quit_confirm ()
-{
- if (inferior_pid != 0 && target_has_execution)
- {
- char *s;
-
- /* This is something of a hack. But there's no reliable way to
- see if a GUI is running. The `use_windows' variable doesn't
- cut it. */
- if (init_ui_hook)
- s = "A debugging session is active.\nDo you still want to close the debugger?";
- else if (attach_flag)
- s = "The program is running. Quit anyway (and detach it)? ";
- else
- s = "The program is running. Exit anyway? ";
-
- if (! query (s))
- return 0;
- }
-
- return 1;
-}
-
-/* Quit without asking for confirmation. */
-
-void
-quit_force (args, from_tty)
- char *args;
- int from_tty;
-{
- int exit_code = 0;
-
- /* An optional expression may be used to cause gdb to terminate with the
- value of that expression. */
- if (args)
- {
- value_ptr val = parse_and_eval (args);
-
- exit_code = (int) value_as_long (val);
- }
-
- if (inferior_pid != 0 && target_has_execution)
- {
- if (attach_flag)
- target_detach (args, from_tty);
- else
- target_kill ();
- }
-
- /* UDI wants this, to kill the TIP. */
- target_close (1);
-
- /* Save the history information if it is appropriate to do so. */
- if (write_history_p && history_filename)
- write_history (history_filename);
-
- do_final_cleanups(ALL_CLEANUPS); /* Do any final cleanups before exiting */
-
-#if defined(TUI)
- /* tuiDo((TuiOpaqueFuncPtr)tuiCleanUp); */
- /* The above does not need to be inside a tuiDo(), since
- * it is not manipulating the curses screen, but rather,
- * it is tearing it down.
- */
- if (tui_version)
- tuiCleanUp();
-#endif
-
- exit (exit_code);
-}
-
-/* Handle the quit command. */
-
-void
-quit_command (args, from_tty)
- char *args;
- int from_tty;
-{
- if (! quit_confirm ())
- error ("Not confirmed.");
- quit_force (args, from_tty);
-}
-
-/* Returns whether GDB is running on a terminal and whether the user
- desires that questions be asked of them on that terminal. */
-
-int
-input_from_terminal_p ()
-{
- return gdb_has_a_terminal () && (instream == stdin) & caution;
-}
-\f
-/* ARGSUSED */
-static void
-pwd_command (args, from_tty)
- char *args;
- int from_tty;
-{
- if (args) error ("The \"pwd\" command does not take an argument: %s", args);
- getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
-
- if (!STREQ (gdb_dirbuf, current_directory))
- printf_unfiltered ("Working directory %s\n (canonically %s).\n",
- current_directory, gdb_dirbuf);
- else
- printf_unfiltered ("Working directory %s.\n", current_directory);
-}
-
-void
-cd_command (dir, from_tty)
- char *dir;
- int from_tty;
-{
- int len;
- /* Found something other than leading repetitions of "/..". */
- int found_real_path;
- char *p;
-
- /* If the new directory is absolute, repeat is a no-op; if relative,
- repeat might be useful but is more likely to be a mistake. */
- dont_repeat ();
-
- if (dir == 0)
- error_no_arg ("new working directory");
-
- dir = tilde_expand (dir);
- make_cleanup (free, dir);
-
- if (chdir (dir) < 0)
- perror_with_name (dir);
-
- len = strlen (dir);
- dir = savestring (dir, len - (len > 1 && SLASH_P(dir[len-1])));
- if (ROOTED_P(dir))
- current_directory = dir;
- else
- {
- if (SLASH_P (current_directory[0]) && current_directory[1] == '\0')
- current_directory = concat (current_directory, dir, NULL);
- else
- current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
- free (dir);
- }
-
- /* Now simplify any occurrences of `.' and `..' in the pathname. */
-
- found_real_path = 0;
- for (p = current_directory; *p;)
- {
- if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2])))
- strcpy (p, p + 2);
- else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.'
- && (p[3] == 0 || SLASH_P (p[3])))
- {
- if (found_real_path)
- {
- /* Search backwards for the directory just before the "/.."
- and obliterate it and the "/..". */
- char *q = p;
- while (q != current_directory && ! SLASH_P (q[-1]))
- --q;
-
- if (q == current_directory)
- /* current_directory is
- a relative pathname ("can't happen"--leave it alone). */
- ++p;
- else
- {
- strcpy (q - 1, p + 3);
- p = q - 1;
- }
- }
- else
- /* We are dealing with leading repetitions of "/..", for example
- "/../..", which is the Mach super-root. */
- p += 3;
- }
- else
- {
- found_real_path = 1;
- ++p;
- }
- }
-
- forget_cached_source_info ();
-
- if (from_tty)
- pwd_command ((char *) 0, 1);
-}
-\f
-struct source_cleanup_lines_args {
- int old_line;
- char *old_file;
- char *old_pre_error;
- char *old_error_pre_print;
-};
-
-static void
-source_cleanup_lines (args)
- PTR args;
-{
- struct source_cleanup_lines_args *p =
- (struct source_cleanup_lines_args *)args;
- source_line_number = p->old_line;
- source_file_name = p->old_file;
- source_pre_error = p->old_pre_error;
- error_pre_print = p->old_error_pre_print;
-}
-
-/* ARGSUSED */
-void
-source_command (args, from_tty)
- char *args;
- int from_tty;
-{
- FILE *stream;
- struct cleanup *old_cleanups;
- char *file = args;
- struct source_cleanup_lines_args old_lines;
- int needed_length;
-
- if (file == NULL)
- {
- error ("source command requires pathname of file to source.");
- }
-
- file = tilde_expand (file);
- old_cleanups = make_cleanup (free, file);
-
- stream = fopen (file, FOPEN_RT);
- if (!stream)
- {
- if (from_tty)
- perror_with_name (file);
- else
- return;
- }
-
- make_cleanup ((make_cleanup_func) fclose, stream);
-
- old_lines.old_line = source_line_number;
- old_lines.old_file = source_file_name;
- old_lines.old_pre_error = source_pre_error;
- old_lines.old_error_pre_print = error_pre_print;
- make_cleanup (source_cleanup_lines, &old_lines);
- source_line_number = 0;
- source_file_name = file;
- source_pre_error = error_pre_print == NULL ? "" : error_pre_print;
- source_pre_error = savestring (source_pre_error, strlen (source_pre_error));
- make_cleanup (free, source_pre_error);
- /* This will get set every time we read a line. So it won't stay "" for
- long. */
- error_pre_print = "";
-
- needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80;
- if (source_error_allocated < needed_length)
- {
- source_error_allocated *= 2;
- if (source_error_allocated < needed_length)
- source_error_allocated = needed_length;
- if (source_error == NULL)
- source_error = xmalloc (source_error_allocated);
- else
- source_error = xrealloc (source_error, source_error_allocated);
- }
-
- read_command_file (stream);
-
- do_cleanups (old_cleanups);
-}
-
-/* ARGSUSED */
-static void
-echo_command (text, from_tty)
- char *text;
- int from_tty;
-{
- char *p = text;
- register int c;
-
- if (text)
- while ((c = *p++) != '\0')
- {
- if (c == '\\')
- {
- /* \ at end of argument is used after spaces
- so they won't be lost. */
- if (*p == 0)
- return;
-
- c = parse_escape (&p);
- if (c >= 0)
- printf_filtered ("%c", c);
- }
- else
- printf_filtered ("%c", c);
- }
-
- /* Force this output to appear now. */
- wrap_here ("");
- gdb_flush (gdb_stdout);
-}
-
-/* ARGSUSED */
-static void
-dont_repeat_command (ignored, from_tty)
- char *ignored;
- int from_tty;
-{
- *line = 0; /* Can't call dont_repeat here because we're not
- necessarily reading from stdin. */
-}
-\f
-/* Functions to manipulate command line editing control variables. */
-
-/* Number of commands to print in each call to show_commands. */
-#define Hist_print 10
-static void
-show_commands (args, from_tty)
- char *args;
- int from_tty;
-{
- /* Index for history commands. Relative to history_base. */
- int offset;
-
- /* Number of the history entry which we are planning to display next.
- Relative to history_base. */
- static int num = 0;
-
- /* The first command in the history which doesn't exist (i.e. one more
- than the number of the last command). Relative to history_base. */
- int hist_len;
-
- extern HIST_ENTRY *history_get PARAMS ((int));
-
- /* Print out some of the commands from the command history. */
- /* First determine the length of the history list. */
- hist_len = history_size;
- for (offset = 0; offset < history_size; offset++)
- {
- if (!history_get (history_base + offset))
- {
- hist_len = offset;
- break;
- }
- }
-
- if (args)
- {
- if (args[0] == '+' && args[1] == '\0')
- /* "info editing +" should print from the stored position. */
- ;
- else
- /* "info editing <exp>" should print around command number <exp>. */
- num = (parse_and_eval_address (args) - history_base) - Hist_print / 2;
- }
- /* "show commands" means print the last Hist_print commands. */
- else
- {
- num = hist_len - Hist_print;
- }
-
- if (num < 0)
- num = 0;
-
- /* If there are at least Hist_print commands, we want to display the last
- Hist_print rather than, say, the last 6. */
- if (hist_len - num < Hist_print)
- {
- num = hist_len - Hist_print;
- if (num < 0)
- num = 0;
- }
-
- for (offset = num; offset < num + Hist_print && offset < hist_len; offset++)
- {
- printf_filtered ("%5d %s\n", history_base + offset,
- (history_get (history_base + offset))->line);
- }
-
- /* The next command we want to display is the next one that we haven't
- displayed yet. */
- num += Hist_print;
-
- /* If the user repeats this command with return, it should do what
- "show commands +" does. This is unnecessary if arg is null,
- because "show commands +" is not useful after "show commands". */
- if (from_tty && args)
- {
- args[0] = '+';
- args[1] = '\0';
- }
-}
-
-/* Called by do_setshow_command. */
-/* ARGSUSED */
-static void
-set_history_size_command (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
-{
- if (history_size == INT_MAX)
- unstifle_history ();
- else if (history_size >= 0)
- stifle_history (history_size);
- else
- {
- history_size = INT_MAX;
- error ("History size must be non-negative");
- }
-}
-
-/* ARGSUSED */
-static void
-set_history (args, from_tty)
- char *args;
- int from_tty;
-{
- printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
- help_list (sethistlist, "set history ", -1, gdb_stdout);
-}
-
-/* ARGSUSED */
-static void
-show_history (args, from_tty)
- char *args;
- int from_tty;
-{
- cmd_show_list (showhistlist, from_tty, "");
-}
-
-int info_verbose = 0; /* Default verbose msgs off */
-
-/* Called by do_setshow_command. An elaborate joke. */
-/* ARGSUSED */
-static void
-set_verbose (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
-{
- char *cmdname = "verbose";
- struct cmd_list_element *showcmd;
-
- showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
-
- if (info_verbose)
- {
- c->doc = "Set verbose printing of informational messages.";
- showcmd->doc = "Show verbose printing of informational messages.";
- }
- else
- {
- c->doc = "Set verbosity.";
- showcmd->doc = "Show verbosity.";
- }
-}
-
-static void
-float_handler (signo)
-int signo;
-{
- /* This message is based on ANSI C, section 4.7. Note that integer
- divide by zero causes this, so "float" is a misnomer. */
- signal (SIGFPE, float_handler);
- error ("Erroneous arithmetic operation.");
-}
-
-\f
-static void
-init_cmd_lists ()
-{
- cmdlist = NULL;
- infolist = NULL;
- enablelist = NULL;
- disablelist = NULL;
- togglelist = NULL;
- stoplist = NULL;
- deletelist = NULL;
- enablebreaklist = NULL;
- setlist = NULL;
- unsetlist = NULL;
- showlist = NULL;
- sethistlist = NULL;
- showhistlist = NULL;
- unsethistlist = NULL;
- maintenancelist = NULL;
- maintenanceinfolist = NULL;
- maintenanceprintlist = NULL;
- setprintlist = NULL;
- showprintlist = NULL;
- setchecklist = NULL;
- showchecklist = NULL;
-}
-
-/* Init the history buffer. Note that we are called after the init file(s)
- * have been read so that the user can change the history file via his
- * .gdbinit file (for instance). The GDBHISTFILE environment variable
- * overrides all of this.
- */
-
-void
-init_history()
-{
- char *tmpenv;
-
- tmpenv = getenv ("HISTSIZE");
- if (tmpenv)
- history_size = atoi (tmpenv);
- else if (!history_size)
- history_size = 256;
-
- stifle_history (history_size);
-
- tmpenv = getenv ("GDBHISTFILE");
- if (tmpenv)
- history_filename = savestring (tmpenv, strlen(tmpenv));
- else if (!history_filename) {
- /* We include the current directory so that if the user changes
- directories the file written will be the same as the one
- that was read. */
- history_filename = concat (current_directory, "/.gdb_history", NULL);
- }
- read_history (history_filename);
-}
-
-static void
-init_main ()
-{
- struct cmd_list_element *c;
-
- /* from event-top.c */
- extern int async_command_editing_p;
- extern struct prompts the_prompts;
- extern char *async_annotation_suffix;
- extern char *new_async_prompt;
-
- /* If we are running the asynchronous version,
- we initialize the prompts differently. */
- if (!async_hook)
- {
-#ifdef DEFAULT_PROMPT
- prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT));
-#else
- prompt = savestring ("(gdb) ", 6);
-#endif
- }
- else
- {
- /* initialize the prompt stack to a simple "(gdb) " prompt or to
- whatever the DEFULAT_PROMPT is. */
- the_prompts.top = 0;
- PREFIX(0) = "";
-#ifdef DEFAULT_PROMPT
- PROMPT(0) = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT));
-#else
- PROMPT(0) = savestring ("(gdb) ", 6);
-#endif
- SUFFIX(0) = "";
- /* Set things up for annotation_level > 1, if the user ever decides
- to use it. */
- async_annotation_suffix = "prompt";
- /* Set the variable associated with the setshow prompt command. */
- new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0)));
- }
-
- /* Set the important stuff up for command editing. */
- command_editing_p = 1;
- async_command_editing_p = 1;
- history_expansion_p = 0;
- write_history_p = 0;
-
- /* Setup important stuff for command line editing. */
- rl_completion_entry_function = (int (*)()) readline_line_completion_function;
- rl_completer_word_break_characters = gdb_completer_word_break_characters;
- rl_completer_quote_characters = gdb_completer_quote_characters;
- rl_readline_name = "gdb";
-
- /* Define the classes of commands.
- They will appear in the help list in the reverse of this order. */
-
- add_cmd ("internals", class_maintenance, NO_FUNCTION,
- "Maintenance commands.\n\
-Some gdb commands are provided just for use by gdb maintainers.\n\
-These commands are subject to frequent change, and may not be as\n\
-well documented as user commands.",
- &cmdlist);
- add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
- add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
- add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\
-The commands in this class are those defined by the user.\n\
-Use the \"define\" command to define a command.", &cmdlist);
- add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist);
- if (!dbx_commands)
- add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
- add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
- add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
- add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
- add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\
-The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
-counting from zero for the innermost (currently executing) frame.\n\n\
-At any time gdb identifies one frame as the \"selected\" frame.\n\
-Variable lookups are done with respect to the selected frame.\n\
-When the program being debugged stops, gdb selects the innermost frame.\n\
-The commands below can be used to select other frames by number or address.",
- &cmdlist);
- add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
-
- add_com ("pwd", class_files, pwd_command,
- "Print working directory. This is used for your program as well.");
- c = add_cmd ("cd", class_files, cd_command,
- "Set working directory to DIR for debugger and program being debugged.\n\
-The change does not take effect for the program being debugged\n\
-until the next time it is started.", &cmdlist);
- c->completer = filename_completer;
-
- /* 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
- gdb. */
- if (!async_hook)
- {
- add_show_from_set
- (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt,
- "Set gdb's prompt",
- &setlist),
- &showlist);
- }
- else
- {
- c = add_set_cmd ("prompt", class_support, var_string,
- (char *)&new_async_prompt,
- "Set gdb's prompt",
- &setlist);
- add_show_from_set (c, &showlist);
- c->function.sfunc = set_async_prompt;
- }
-
- add_com ("echo", class_support, echo_command,
- "Print a constant string. Give string as argument.\n\
-C escape sequences may be used in the argument.\n\
-No newline is added at the end of the argument;\n\
-use \"\\n\" if you want a newline to be printed.\n\
-Since leading and trailing whitespace are ignored in command arguments,\n\
-if you want to print some you must use \"\\\" before leading whitespace\n\
-to be printed or after trailing whitespace.");
- add_com ("document", class_support, document_command,
- "Document a user-defined command.\n\
-Give command name as argument. Give documentation on following lines.\n\
-End with a line of just \"end\".");
- add_com ("define", class_support, define_command,
- "Define a new command name. Command name is argument.\n\
-Definition appears on following lines, one command per line.\n\
-End with a line of just \"end\".\n\
-Use the \"document\" command to give documentation for the new command.\n\
-Commands defined in this way may have up to ten arguments.");
-
-#ifdef __STDC__
- c = add_cmd ("source", class_support, source_command,
- "Read commands from a file named FILE.\n\
-Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
-when gdb is started.", &cmdlist);
-#else
- /* Punt file name, we can't help it easily. */
- c = add_cmd ("source", class_support, source_command,
- "Read commands from a file named FILE.\n\
-Note that the file \".gdbinit\" is read automatically in this way\n\
-when gdb is started.", &cmdlist);
-#endif
- c->completer = filename_completer;
-
- add_com ("quit", class_support, quit_command, "Exit gdb.");
- add_com ("help", class_support, help_command, "Print list of commands.");
- add_com_alias ("q", "quit", class_support, 1);
- add_com_alias ("h", "help", class_support, 1);
-
- add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\
-Primarily used inside of user-defined commands that should not be repeated when\n\
-hitting return.");
-
- c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose,
- "Set ",
- &setlist),
- add_show_from_set (c, &showlist);
- c->function.sfunc = set_verbose;
- set_verbose (NULL, 0, c);
-
- /* The set editing 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 gdb. */
- if (!async_hook)
- {
- add_show_from_set
- (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p,
- "Set editing of command lines as they are typed.\n\
-Use \"on\" to enable the editing, and \"off\" to disable it.\n\
-Without an argument, command line editing is enabled. To edit, use\n\
-EMACS-like or VI-like commands like control-P or ESC.", &setlist),
- &showlist);
- }
- else
- {
- c = add_set_cmd ("editing", class_support, var_boolean, (char *)&async_command_editing_p,
- "Set editing of command lines as they are typed.\n\
-Use \"on\" to enable the editing, and \"off\" to disable it.\n\
-Without an argument, command line editing is enabled. To edit, use\n\
-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;
- }
-
- add_prefix_cmd ("history", class_support, set_history,
- "Generic command for setting command history parameters.",
- &sethistlist, "set history ", 0, &setlist);
- add_prefix_cmd ("history", class_support, show_history,
- "Generic command for showing command history parameters.",
- &showhistlist, "show history ", 0, &showlist);
-
- add_show_from_set
- (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p,
- "Set history expansion on command input.\n\
-Without an argument, history expansion is enabled.", &sethistlist),
- &showhistlist);
-
- add_show_from_set
- (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p,
- "Set saving of the history record on exit.\n\
-Use \"on\" to enable the saving, and \"off\" to disable it.\n\
-Without an argument, saving is enabled.", &sethistlist),
- &showhistlist);
-
- c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size,
- "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;
-
- add_show_from_set
- (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),
- &showhistlist);
-
- add_show_from_set
- (add_set_cmd ("confirm", class_support, var_boolean,
- (char *)&caution,
- "Set whether to confirm potentially dangerous operations.",
- &setlist),
- &showlist);
-
- add_prefix_cmd ("info", class_info, info_command,
- "Generic command for showing things about the program being debugged.",
- &infolist, "info ", 0, &cmdlist);
- add_com_alias ("i", "info", class_info, 1);
-
- add_com ("complete", class_obscure, complete_command,
- "List the completions for the rest of the line as a command.");
-
- add_prefix_cmd ("show", class_info, show_command,
- "Generic command for showing things about the debugger.",
- &showlist, "show ", 0, &cmdlist);
- /* Another way to get at the same thing. */
- add_info ("set", show_command, "Show all GDB settings.");
-
- add_cmd ("commands", no_class, show_commands,
- "Show the history of commands you typed.\n\
-You can supply a command number to start with, or a `+' to start after\n\
-the previous command number shown.",
- &showlist);
-
- add_cmd ("version", no_class, show_version,
- "Show what version of GDB this is.", &showlist);
-
- add_com ("while", class_support, while_command,
-"Execute nested commands WHILE the conditional expression is non zero.\n\
-The conditional expression must follow the word `while' and must in turn be\n\
-followed by a new line. The nested commands must be entered one per line,\n\
-and should be terminated by the word `end'.");
-
- add_com ("if", class_support, if_command,
-"Execute nested commands once IF the conditional expression is non zero.\n\
-The conditional expression must follow the word `if' and must in turn be\n\
-followed by a new line. The nested commands must be entered one per line,\n\
-and should be terminated by the word 'else' or `end'. If an else clause\n\
-is used, the same rules apply to its nested commands as to the first ones.");
-
- /* If target is open when baud changes, it doesn't take effect until the
- next open (I think, not sure). */
- add_show_from_set (add_set_cmd ("remotebaud", no_class,
- var_zinteger, (char *)&baud_rate,
- "Set baud rate for remote serial I/O.\n\
-This value is used to set the speed of the serial port when debugging\n\
-using remote targets.", &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("remotedebug", no_class, var_zinteger, (char *)&remote_debug,
- "Set debugging of remote protocol.\n\
-When enabled, each packet sent or received with the remote target\n\
-is displayed.", &setlist),
- &showlist);
-
- add_show_from_set (
- add_set_cmd ("remotetimeout", no_class, var_integer, (char *)&remote_timeout,
- "Set timeout limit to wait for target to respond.\n\
-This value is used to set the time limit for gdb to wait for a response\n\
-from the target.", &setlist),
- &showlist);
-
- /* The set annotate 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
- gdb. */
- if (!async_hook)
- {
- c = add_set_cmd ("annotate", class_obscure, var_zinteger,
- (char *)&annotation_level, "Set annotation_level.\n\
-0 == normal; 1 == fullname (for use when running under emacs)\n\
-2 == output annotated suitably for use by programs that control GDB.",
- &setlist);
- c = add_show_from_set (c, &showlist);
- }
- else
- {
- c = add_set_cmd ("annotate", class_obscure, var_zinteger,
- (char *)&annotation_level, "Set annotation_level.\n\
-0 == normal; 1 == fullname (for use when running under emacs)\n\
-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;
- }
-}
projects / thirdparty / binutils-gdb.git / blobdiff