/* GDB CLI command scripting.
- Copyright (c) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include <ctype.h>
#include "ui-out.h"
-#include "gdb_string.h"
-#include "exceptions.h"
#include "top.h"
#include "breakpoint.h"
#include "cli/cli-cmds.h"
#include "cli/cli-decode.h"
#include "cli/cli-script.h"
-#include "gdb_assert.h"
-#include "python/python.h"
+#include "extension.h"
+#include "interps.h"
+#include "compile/compile.h"
+
+#include <vector>
/* Prototypes for local functions. */
void (*validator)(char *, void *),
void *closure);
-static char *insert_args (char *line);
-
-static struct cleanup * setup_user_args (char *p);
-
static char *read_next_line (void);
/* Level of control structure when reading. */
/* This is to prevent certain commands being printed twice. */
static int suppress_next_print_command_trace = 0;
+/* A non-owning slice of a string. */
+
+struct string_view
+{
+ string_view (const char *str_, size_t len_)
+ : str (str_), len (len_)
+ {}
+
+ const char *str;
+ size_t len;
+};
+
/* Structure for arguments to user defined functions. */
-#define MAXUSERARGS 10
-struct user_args
+
+class user_args
+{
+public:
+ /* Save the command line and store the locations of arguments passed
+ to the user defined function. */
+ explicit user_args (const char *line);
+
+ /* Insert the stored user defined arguments into the $arg arguments
+ found in LINE. */
+ std::string insert_args (const char *line) const;
+
+private:
+ /* Disable copy/assignment. (Since the elements of A point inside
+ COMMAND, copying would need to reconstruct the A vector in the
+ new copy.) */
+ user_args (const user_args &) =delete;
+ user_args &operator= (const user_args &) =delete;
+
+ /* It is necessary to store a copy of the command line to ensure
+ that the arguments are not overwritten before they are used. */
+ std::string m_command_line;
+
+ /* The arguments. Each element points inside M_COMMAND_LINE. */
+ std::vector<string_view> m_args;
+};
+
+/* The stack of arguments passed to user defined functions. We need a
+ stack because user-defined functions can call other user-defined
+ functions. */
+static std::vector<std::unique_ptr<user_args>> user_args_stack;
+
+/* An RAII-base class used to push/pop args on the user args
+ stack. */
+struct scoped_user_args_level
+{
+ /* Parse the command line and push the arguments in the user args
+ stack. */
+ explicit scoped_user_args_level (const char *line)
{
- struct user_args *next;
- /* It is necessary to store a malloced copy of the command line to
- ensure that the arguments are not overwritten before they are
- used. */
- char *command;
- struct
- {
- char *arg;
- int len;
- }
- a[MAXUSERARGS];
- int count;
+ user_args_stack.emplace_back (new user_args (line));
+ }
+
+ /* Pop the current user arguments from the stack. */
+ ~scoped_user_args_level ()
+ {
+ user_args_stack.pop_back ();
}
- *user_args;
+};
\f
+/* Return non-zero if TYPE is a multi-line command (i.e., is terminated
+ by "end"). */
+
+static int
+multi_line_command_p (enum command_control_type type)
+{
+ switch (type)
+ {
+ case if_control:
+ case while_control:
+ case while_stepping_control:
+ case commands_control:
+ case compile_control:
+ case python_control:
+ case guile_control:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
/* Allocate, initialize a new command line structure for one of the
control commands (if/while). */
static struct command_line *
-build_command_line (enum command_control_type type, char *args)
+build_command_line (enum command_control_type type, const char *args)
{
struct command_line *cmd;
error (_("if/while commands require arguments."));
gdb_assert (args != NULL);
- cmd = (struct command_line *) xmalloc (sizeof (struct command_line));
+ cmd = XNEW (struct command_line);
cmd->next = NULL;
cmd->control_type = type;
cmd->body_count = 1;
- cmd->body_list
- = (struct command_line **) xmalloc (sizeof (struct command_line *)
- * cmd->body_count);
- memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count);
+ cmd->body_list = XCNEWVEC (struct command_line *, cmd->body_count);
cmd->line = xstrdup (args);
return cmd;
/* Build and return a new command structure for the control commands
such as "if" and "while". */
-struct command_line *
-get_command_line (enum command_control_type type, char *arg)
+command_line_up
+get_command_line (enum command_control_type type, const char *arg)
{
- struct command_line *cmd;
- struct cleanup *old_chain = NULL;
-
/* Allocate and build a new command line structure. */
- cmd = build_command_line (type, arg);
-
- old_chain = make_cleanup_free_command_lines (&cmd);
+ command_line_up cmd (build_command_line (type, arg));
/* Read in the body of this command. */
- if (recurse_read_control_structure (read_next_line, cmd, 0, 0)
+ if (recurse_read_control_structure (read_next_line, cmd.get (), 0, 0)
== invalid_control)
{
warning (_("Error reading in canned sequence of commands."));
- do_cleanups (old_chain);
return NULL;
}
- discard_cleanups (old_chain);
return cmd;
}
while (list)
{
if (depth)
- ui_out_spaces (uiout, 2 * depth);
+ uiout->spaces (2 * depth);
/* A simple command, print it and continue. */
if (list->control_type == simple_control)
{
- ui_out_field_string (uiout, NULL, list->line);
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, list->line);
+ uiout->text ("\n");
list = list->next;
continue;
}
and continue. */
if (list->control_type == continue_control)
{
- ui_out_field_string (uiout, NULL, "loop_continue");
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, "loop_continue");
+ uiout->text ("\n");
list = list->next;
continue;
}
continue. */
if (list->control_type == break_control)
{
- ui_out_field_string (uiout, NULL, "loop_break");
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, "loop_break");
+ uiout->text ("\n");
list = list->next;
continue;
}
token. See comment in process_next_line for explanation.
Here, take care not print 'while-stepping' twice. */
if (list->control_type == while_control)
- ui_out_field_fmt (uiout, NULL, "while %s", list->line);
+ uiout->field_fmt (NULL, "while %s", list->line);
else
- ui_out_field_string (uiout, NULL, list->line);
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, list->line);
+ uiout->text ("\n");
print_command_lines (uiout, *list->body_list, depth + 1);
if (depth)
- ui_out_spaces (uiout, 2 * depth);
- ui_out_field_string (uiout, NULL, "end");
- ui_out_text (uiout, "\n");
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
list = list->next;
continue;
}
continueing. */
if (list->control_type == if_control)
{
- ui_out_field_fmt (uiout, NULL, "if %s", list->line);
- ui_out_text (uiout, "\n");
+ uiout->field_fmt (NULL, "if %s", list->line);
+ uiout->text ("\n");
/* The true arm. */
print_command_lines (uiout, list->body_list[0], depth + 1);
if (list->body_count == 2)
{
if (depth)
- ui_out_spaces (uiout, 2 * depth);
- ui_out_field_string (uiout, NULL, "else");
- ui_out_text (uiout, "\n");
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "else");
+ uiout->text ("\n");
print_command_lines (uiout, list->body_list[1], depth + 1);
}
if (depth)
- ui_out_spaces (uiout, 2 * depth);
- ui_out_field_string (uiout, NULL, "end");
- ui_out_text (uiout, "\n");
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
list = list->next;
continue;
}
if (list->control_type == commands_control)
{
if (*(list->line))
- ui_out_field_fmt (uiout, NULL, "commands %s", list->line);
+ uiout->field_fmt (NULL, "commands %s", list->line);
else
- ui_out_field_string (uiout, NULL, "commands");
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, "commands");
+ uiout->text ("\n");
print_command_lines (uiout, *list->body_list, depth + 1);
if (depth)
- ui_out_spaces (uiout, 2 * depth);
- ui_out_field_string (uiout, NULL, "end");
- ui_out_text (uiout, "\n");
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
list = list->next;
continue;
}
if (list->control_type == python_control)
{
- ui_out_field_string (uiout, NULL, "python");
- ui_out_text (uiout, "\n");
+ uiout->field_string (NULL, "python");
+ uiout->text ("\n");
/* Don't indent python code at all. */
print_command_lines (uiout, *list->body_list, 0);
if (depth)
- ui_out_spaces (uiout, 2 * depth);
- ui_out_field_string (uiout, NULL, "end");
- ui_out_text (uiout, "\n");
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
+ list = list->next;
+ continue;
+ }
+
+ if (list->control_type == compile_control)
+ {
+ uiout->field_string (NULL, "compile expression");
+ uiout->text ("\n");
+ print_command_lines (uiout, *list->body_list, 0);
+ if (depth)
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
+ list = list->next;
+ continue;
+ }
+
+ if (list->control_type == guile_control)
+ {
+ uiout->field_string (NULL, "guile");
+ uiout->text ("\n");
+ print_command_lines (uiout, *list->body_list, depth + 1);
+ if (depth)
+ uiout->spaces (2 * depth);
+ uiout->field_string (NULL, "end");
+ uiout->text ("\n");
list = list->next;
continue;
}
static void
clear_hook_in_cleanup (void *data)
{
- struct cmd_list_element *c = data;
+ struct cmd_list_element *c = (struct cmd_list_element *) data;
c->hook_in = 0; /* Allow hook to work again once it is complete. */
}
static void
do_restore_user_call_depth (void * call_depth)
{
- int *depth = call_depth;
+ int *depth = (int *) call_depth;
(*depth)--;
if ((*depth) == 0)
void
execute_user_command (struct cmd_list_element *c, char *args)
{
+ struct ui *ui = current_ui;
struct command_line *cmdlines;
struct cleanup *old_chain;
enum command_control_type ret;
static int user_call_depth = 0;
- extern int max_user_call_depth;
-
- old_chain = setup_user_args (args);
+ extern unsigned int max_user_call_depth;
cmdlines = c->user_commands;
if (cmdlines == 0)
/* Null command */
return;
+ scoped_user_args_level push_user_args (args);
+
if (++user_call_depth > max_user_call_depth)
error (_("Max user call depth exceeded -- command aborted."));
- make_cleanup (do_restore_user_call_depth, &user_call_depth);
+ old_chain = make_cleanup (do_restore_user_call_depth, &user_call_depth);
/* Set the instream to 0, indicating execution of a
user-defined function. */
- make_cleanup (do_restore_instream_cleanup, instream);
- instream = (FILE *) 0;
+ make_cleanup (do_restore_instream_cleanup, ui->instream);
+ ui->instream = NULL;
/* Also set the global in_user_command, so that NULL instream is
not confused with Insight. */
in_user_command = 1;
+ scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0);
+
command_nest_depth++;
while (cmdlines)
{
enum command_control_type
execute_control_command (struct command_line *cmd)
{
- struct expression *expr;
struct command_line *current;
- struct cleanup *old_chain = make_cleanup (null_cleanup, 0);
struct value *val;
struct value *val_mark;
int loop;
enum command_control_type ret;
- char *new_line;
/* Start by assuming failure, if a problem is detected, the code
below will simply "break" out of the switch. */
switch (cmd->control_type)
{
case simple_control:
- /* A simple command, execute it and return. */
- new_line = insert_args (cmd->line);
- if (!new_line)
+ {
+ /* A simple command, execute it and return. */
+ std::string new_line = insert_user_defined_cmd_args (cmd->line);
+ execute_command (&new_line[0], 0);
+ ret = cmd->control_type;
break;
- make_cleanup (free_current_contents, &new_line);
- execute_command (new_line, 0);
- ret = cmd->control_type;
- break;
+ }
case continue_control:
print_command_trace ("loop_continue");
case while_control:
{
- char *buffer = alloca (strlen (cmd->line) + 7);
+ int len = strlen (cmd->line) + 7;
+ char *buffer = (char *) alloca (len);
- sprintf (buffer, "while %s", cmd->line);
+ xsnprintf (buffer, len, "while %s", cmd->line);
print_command_trace (buffer);
/* Parse the loop control expression for the while statement. */
- new_line = insert_args (cmd->line);
- if (!new_line)
- break;
- make_cleanup (free_current_contents, &new_line);
- expr = parse_expression (new_line);
- make_cleanup (free_current_contents, &expr);
+ std::string new_line = insert_user_defined_cmd_args (cmd->line);
+ expression_up expr = parse_expression (new_line.c_str ());
ret = simple_control;
loop = 1;
/* Evaluate the expression. */
val_mark = value_mark ();
- val = evaluate_expression (expr);
+ val = evaluate_expression (expr.get ());
cond_result = value_true (val);
value_free_to_mark (val_mark);
case if_control:
{
- char *buffer = alloca (strlen (cmd->line) + 4);
+ int len = strlen (cmd->line) + 4;
+ char *buffer = (char *) alloca (len);
- sprintf (buffer, "if %s", cmd->line);
+ xsnprintf (buffer, len, "if %s", cmd->line);
print_command_trace (buffer);
- new_line = insert_args (cmd->line);
- if (!new_line)
- break;
- make_cleanup (free_current_contents, &new_line);
/* Parse the conditional for the if statement. */
- expr = parse_expression (new_line);
- make_cleanup (free_current_contents, &expr);
+ std::string new_line = insert_user_defined_cmd_args (cmd->line);
+ expression_up expr = parse_expression (new_line.c_str ());
current = NULL;
ret = simple_control;
/* Evaluate the conditional. */
val_mark = value_mark ();
- val = evaluate_expression (expr);
+ val = evaluate_expression (expr.get ());
/* Choose which arm to take commands from based on the value
of the conditional expression. */
break;
}
+
case commands_control:
{
/* Breakpoint commands list, record the commands in the
breakpoint's command list and return. */
- new_line = insert_args (cmd->line);
- if (!new_line)
- break;
- make_cleanup (free_current_contents, &new_line);
- ret = commands_from_control_command (new_line, cmd);
+ std::string new_line = insert_user_defined_cmd_args (cmd->line);
+ ret = commands_from_control_command (new_line.c_str (), cmd);
break;
}
+
+ case compile_control:
+ eval_compile_command (cmd, NULL, cmd->control_u.compile.scope,
+ cmd->control_u.compile.scope_data);
+ ret = simple_control;
+ break;
+
case python_control:
+ case guile_control:
{
- eval_python_from_control_command (cmd);
+ eval_ext_lang_from_control_command (cmd);
ret = simple_control;
break;
}
break;
}
- do_cleanups (old_chain);
-
return ret;
}
/* "while" command support. Executes a body of statements while the
loop condition is nonzero. */
-void
+static void
while_command (char *arg, int from_tty)
{
- struct command_line *command = NULL;
-
control_level = 1;
- command = get_command_line (while_control, arg);
+ command_line_up command = get_command_line (while_control, arg);
if (command == NULL)
return;
- execute_control_command_untraced (command);
- free_command_lines (&command);
+ scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0);
+
+ execute_control_command_untraced (command.get ());
}
/* "if" command support. Execute either the true or false arm depending
on the value of the if conditional. */
-void
+static void
if_command (char *arg, int from_tty)
{
- struct command_line *command = NULL;
-
control_level = 1;
- command = get_command_line (if_control, arg);
+ command_line_up command = get_command_line (if_control, arg);
if (command == NULL)
return;
- execute_control_command_untraced (command);
- free_command_lines (&command);
-}
-
-/* Cleanup */
-static void
-arg_cleanup (void *ignore)
-{
- struct user_args *oargs = user_args;
-
- if (!user_args)
- internal_error (__FILE__, __LINE__,
- _("arg_cleanup called with no user args.\n"));
+ scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0);
- user_args = user_args->next;
- xfree (oargs->command);
- xfree (oargs);
+ execute_control_command_untraced (command.get ());
}
-/* Bind the incomming arguments for a user defined command to
- $arg0, $arg1 ... $argMAXUSERARGS. */
+/* Bind the incoming arguments for a user defined command to $arg0,
+ $arg1 ... $argN. */
-static struct cleanup *
-setup_user_args (char *p)
+user_args::user_args (const char *command_line)
{
- struct user_args *args;
- struct cleanup *old_chain;
- unsigned int arg_count = 0;
-
- args = (struct user_args *) xmalloc (sizeof (struct user_args));
- memset (args, 0, sizeof (struct user_args));
-
- args->next = user_args;
- user_args = args;
+ const char *p;
- old_chain = make_cleanup (arg_cleanup, 0/*ignored*/);
-
- if (p == NULL)
- return old_chain;
+ if (command_line == NULL)
+ return;
- user_args->command = p = xstrdup (p);
+ m_command_line = command_line;
+ p = m_command_line.c_str ();
while (*p)
{
- char *start_arg;
+ const char *start_arg;
int squote = 0;
int dquote = 0;
int bsquote = 0;
- if (arg_count >= MAXUSERARGS)
- {
- error (_("user defined function may only have %d arguments."),
- MAXUSERARGS);
- return old_chain;
- }
-
/* Strip whitespace. */
while (*p == ' ' || *p == '\t')
p++;
/* P now points to an argument. */
start_arg = p;
- user_args->a[arg_count].arg = p;
/* Get to the end of this argument. */
while (*p)
}
}
- user_args->a[arg_count].len = p - start_arg;
- arg_count++;
- user_args->count++;
+ m_args.emplace_back (start_arg, p - start_arg);
}
- return old_chain;
}
/* Given character string P, return a point to the first argument
($arg), or NULL if P contains no arguments. */
-static char *
-locate_arg (char *p)
+static const char *
+locate_arg (const char *p)
{
while ((p = strchr (p, '$')))
{
- if (strncmp (p, "$arg", 4) == 0
+ if (startswith (p, "$arg")
&& (isdigit (p[4]) || p[4] == 'c'))
return p;
p++;
return NULL;
}
-/* Insert the user defined arguments stored in user_arg into the $arg
- arguments found in line, with the updated copy being placed into
- nline. */
+/* See cli-script.h. */
-static char *
-insert_args (char *line)
+std::string
+insert_user_defined_cmd_args (const char *line)
{
- char *p, *save_line, *new_line;
- unsigned len, i;
-
- /* If we are not in a user-defined function, treat $argc, $arg0, et
+ /* If we are not in a user-defined command, treat $argc, $arg0, et
cetera as normal convenience variables. */
- if (user_args == NULL)
- return xstrdup (line);
-
- /* First we need to know how much memory to allocate for the new
- line. */
- save_line = line;
- len = 0;
- while ((p = locate_arg (line)))
- {
- len += p - line;
- i = p[4] - '0';
-
- if (p[4] == 'c')
- {
- /* $argc. Number will be <=10. */
- len += user_args->count == 10 ? 2 : 1;
- }
- else if (i >= user_args->count)
- {
- error (_("Missing argument %d in user function."), i);
- return NULL;
- }
- else
- {
- len += user_args->a[i].len;
- }
- line = p + 5;
- }
-
- /* Don't forget the tail. */
- len += strlen (line);
+ if (user_args_stack.empty ())
+ return line;
- /* Allocate space for the new line and fill it in. */
- new_line = (char *) xmalloc (len + 1);
- if (new_line == NULL)
- return NULL;
+ const std::unique_ptr<user_args> &args = user_args_stack.back ();
+ return args->insert_args (line);
+}
- /* Restore pointer to beginning of old line. */
- line = save_line;
+/* Insert the user defined arguments stored in user_args into the $arg
+ arguments found in line. */
- /* Save pointer to beginning of new line. */
- save_line = new_line;
+std::string
+user_args::insert_args (const char *line) const
+{
+ std::string new_line;
+ const char *p;
while ((p = locate_arg (line)))
{
- int i, len;
-
- memcpy (new_line, line, p - line);
- new_line += p - line;
+ new_line.append (line, p - line);
if (p[4] == 'c')
{
- gdb_assert (user_args->count >= 0 && user_args->count <= 10);
- if (user_args->count == 10)
- {
- *(new_line++) = '1';
- *(new_line++) = '0';
- }
- else
- *(new_line++) = user_args->count + '0';
+ new_line += std::to_string (m_args.size ());
+ line = p + 5;
}
else
{
- i = p[4] - '0';
- len = user_args->a[i].len;
- if (len)
+ char *tmp;
+ unsigned long i;
+
+ errno = 0;
+ i = strtoul (p + 4, &tmp, 10);
+ if ((i == 0 && tmp == p + 4) || errno != 0)
+ line = p + 4;
+ else if (i >= m_args.size ())
+ error (_("Missing argument %ld in user function."), i);
+ else
{
- memcpy (new_line, user_args->a[i].arg, len);
- new_line += len;
+ new_line.append (m_args[i].str, m_args[i].len);
+ line = tmp;
}
}
- line = p + 5;
}
/* Don't forget the tail. */
- strcpy (new_line, line);
+ new_line.append (line);
- /* Return a pointer to the beginning of the new line. */
- return save_line;
+ return new_line;
}
\f
if (new_length <= n)
return;
- body_list = (struct command_line **)
- xmalloc (sizeof (struct command_line *) * new_length);
+ body_list = XCNEWVEC (struct command_line *, new_length);
memcpy (body_list, command->body_list, sizeof (struct command_line *) * n);
- memset (body_list + n, 0, sizeof (struct command_line *) * (new_length - n));
xfree (command->body_list);
command->body_list = body_list;
command->body_count = new_length;
}
-/* Read next line from stdout. Passed to read_command_line_1 and
+/* Read next line from stdin. Passed to read_command_line_1 and
recurse_read_control_structure whenever we need to read commands
- from stdout. */
+ from stdin. */
static char *
read_next_line (void)
{
+ struct ui *ui = current_ui;
char *prompt_ptr, control_prompt[256];
int i = 0;
+ int from_tty = ui->instream == ui->stdin_stream;
if (control_level >= 254)
error (_("Control nesting too deep!"));
/* Set a prompt based on the nesting of the control commands. */
- if (instream == stdin || (instream == 0 && deprecated_readline_hook != NULL))
+ if (from_tty
+ || (ui->instream == 0 && deprecated_readline_hook != NULL))
{
for (i = 0; i < control_level; i++)
control_prompt[i] = ' ';
else
prompt_ptr = NULL;
- return command_line_input (prompt_ptr, instream == stdin, "commands");
+ return command_line_input (prompt_ptr, from_tty, "commands");
+}
+
+/* Return true if CMD's name is NAME. */
+
+static bool
+command_name_equals (struct cmd_list_element *cmd, const char *name)
+{
+ return (cmd != NULL
+ && cmd != CMD_LIST_AMBIGUOUS
+ && strcmp (cmd->name, name) == 0);
+}
+
+/* Given an input line P, skip the command and return a pointer to the
+ first argument. */
+
+static const char *
+line_first_arg (const char *p)
+{
+ const char *first_arg = p + find_command_name_length (p);
+
+ return skip_spaces_const (first_arg);
}
/* Process one input line. If the command is an "end", return such an
/* 'end' is always recognized, regardless of parse_commands value.
We also permit whitespace before end and after. */
- if (p_end - p_start == 3 && !strncmp (p_start, "end", 3))
+ if (p_end - p_start == 3 && startswith (p_start, "end"))
return end_command;
-
+
if (parse_commands)
{
+ /* Resolve command abbreviations (e.g. 'ws' for 'while-stepping'). */
+ const char *cmd_name = p;
+ struct cmd_list_element *cmd
+ = lookup_cmd_1 (&cmd_name, cmdlist, NULL, 1);
+
/* If commands are parsed, we skip initial spaces. Otherwise,
which is the case for Python commands and documentation
(see the 'document' command), spaces are preserved. */
return nop_command;
/* Is the else clause of an if control structure? */
- if (p_end - p == 4 && !strncmp (p, "else", 4))
+ if (p_end - p == 4 && startswith (p, "else"))
return else_command;
/* Check for while, if, break, continue, etc and build a new
command line structure for them. */
- if ((p_end - p >= 14 && !strncmp (p, "while-stepping", 14))
- || (p_end - p >= 8 && !strncmp (p, "stepping", 8))
- || (p_end - p >= 2 && !strncmp (p, "ws", 2)))
+ if (command_name_equals (cmd, "while-stepping"))
{
/* Because validate_actionline and encode_action lookup
command's line as command, we need the line to
not. */
*command = build_command_line (while_stepping_control, p);
}
- else if (p_end - p > 5 && !strncmp (p, "while", 5))
+ else if (command_name_equals (cmd, "while"))
{
- char *first_arg;
-
- first_arg = p + 5;
- while (first_arg < p_end && isspace (*first_arg))
- first_arg++;
- *command = build_command_line (while_control, first_arg);
+ *command = build_command_line (while_control, line_first_arg (p));
}
- else if (p_end - p > 2 && !strncmp (p, "if", 2))
+ else if (command_name_equals (cmd, "if"))
{
- char *first_arg;
-
- first_arg = p + 2;
- while (first_arg < p_end && isspace (*first_arg))
- first_arg++;
- *command = build_command_line (if_control, first_arg);
+ *command = build_command_line (if_control, line_first_arg (p));
}
- else if (p_end - p >= 8 && !strncmp (p, "commands", 8))
+ else if (command_name_equals (cmd, "commands"))
{
- char *first_arg;
-
- first_arg = p + 8;
- while (first_arg < p_end && isspace (*first_arg))
- first_arg++;
- *command = build_command_line (commands_control, first_arg);
+ *command = build_command_line (commands_control, line_first_arg (p));
}
- else if (p_end - p == 6 && !strncmp (p, "python", 6))
+ else if (command_name_equals (cmd, "python"))
{
/* Note that we ignore the inline "python command" form
here. */
*command = build_command_line (python_control, "");
}
- else if (p_end - p == 10 && !strncmp (p, "loop_break", 10))
+ else if (command_name_equals (cmd, "compile"))
+ {
+ /* Note that we ignore the inline "compile command" form
+ here. */
+ *command = build_command_line (compile_control, "");
+ (*command)->control_u.compile.scope = COMPILE_I_INVALID_SCOPE;
+ }
+
+ else if (command_name_equals (cmd, "guile"))
{
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
+ /* Note that we ignore the inline "guile command" form here. */
+ *command = build_command_line (guile_control, "");
+ }
+ else if (p_end - p == 10 && startswith (p, "loop_break"))
+ {
+ *command = XNEW (struct command_line);
(*command)->next = NULL;
(*command)->line = NULL;
(*command)->control_type = break_control;
(*command)->body_count = 0;
(*command)->body_list = NULL;
}
- else if (p_end - p == 13 && !strncmp (p, "loop_continue", 13))
+ else if (p_end - p == 13 && startswith (p, "loop_continue"))
{
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
+ *command = XNEW (struct command_line);
(*command)->next = NULL;
(*command)->line = NULL;
(*command)->control_type = continue_control;
if (!parse_commands || not_handled)
{
/* A normal command. */
- *command = (struct command_line *)
- xmalloc (sizeof (struct command_line));
+ *command = XNEW (struct command_line);
(*command)->next = NULL;
(*command)->line = savestring (p, p_end - p);
(*command)->control_type = simple_control;
if (validator)
{
- volatile struct gdb_exception ex;
- TRY_CATCH (ex, RETURN_MASK_ALL)
+ TRY
{
validator ((*command)->line, closure);
}
- if (ex.reason < 0)
+ CATCH (ex, RETURN_MASK_ALL)
{
xfree (*command);
throw_exception (ex);
}
+ END_CATCH
}
/* Nothing special. */
next = NULL;
val = process_next_line (read_next_line_func (), &next,
- current_cmd->control_type != python_control,
+ current_cmd->control_type != python_control
+ && current_cmd->control_type != guile_control
+ && current_cmd->control_type != compile_control,
validator, closure);
/* Just skip blanks and comments. */
if (val == end_command)
{
- if (current_cmd->control_type == while_control
- || current_cmd->control_type == while_stepping_control
- || current_cmd->control_type == if_control
- || current_cmd->control_type == python_control
- || current_cmd->control_type == commands_control)
+ if (multi_line_command_p (current_cmd->control_type))
{
/* Success reading an entire canned sequence of commands. */
ret = simple_control;
/* If the latest line is another control structure, then recurse
on it. */
- if (next->control_type == while_control
- || next->control_type == while_stepping_control
- || next->control_type == if_control
- || next->control_type == python_control
- || next->control_type == commands_control)
+ if (multi_line_command_p (next->control_type))
{
control_level++;
ret = recurse_read_control_structure (read_next_line_func, next,
return ret;
}
+static void
+restore_interp (void *arg)
+{
+ interp_set_temp (interp_name ((struct interp *)arg));
+}
+
/* 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
#define END_MESSAGE "End with a line saying just \"end\"."
-struct command_line *
+command_line_up
read_command_lines (char *prompt_arg, int from_tty, int parse_commands,
void (*validator)(char *, void *), void *closure)
{
- struct command_line *head;
-
- if (from_tty && input_from_terminal_p ())
+ if (from_tty && input_interactive_p (current_ui))
{
if (deprecated_readline_begin_hook)
{
/* Note - intentional to merge messages with no newline. */
- (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE);
+ (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg,
+ END_MESSAGE);
}
else
{
}
}
- head = read_command_lines_1 (read_next_line, parse_commands,
- validator, closure);
- if (deprecated_readline_end_hook && from_tty && input_from_terminal_p ())
+ /* Reading commands assumes the CLI behavior, so temporarily
+ override the current interpreter with CLI. */
+ command_line_up head;
+ if (current_interp_named_p (INTERP_CONSOLE))
+ head = read_command_lines_1 (read_next_line, parse_commands,
+ validator, closure);
+ else
+ {
+ struct interp *old_interp = interp_set_temp (INTERP_CONSOLE);
+ struct cleanup *old_chain = make_cleanup (restore_interp, old_interp);
+
+ head = read_command_lines_1 (read_next_line, parse_commands,
+ validator, closure);
+ do_cleanups (old_chain);
+ }
+
+ if (from_tty && input_interactive_p (current_ui)
+ && deprecated_readline_end_hook)
{
(*deprecated_readline_end_hook) ();
}
/* Act the same way as read_command_lines, except that each new line is
obtained using READ_NEXT_LINE_FUNC. */
-struct command_line *
+command_line_up
read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands,
void (*validator)(char *, void *), void *closure)
{
- struct command_line *head, *tail, *next;
- struct cleanup *old_chain;
+ struct command_line *tail, *next;
+ command_line_up head;
enum command_control_type ret;
enum misc_command_type val;
control_level = 0;
- head = tail = NULL;
- old_chain = NULL;
+ tail = NULL;
while (1)
{
break;
}
- if (next->control_type == while_control
- || next->control_type == if_control
- || next->control_type == python_control
- || next->control_type == commands_control
- || next->control_type == while_stepping_control)
+ if (multi_line_command_p (next->control_type))
{
control_level++;
ret = recurse_read_control_structure (read_next_line_func, next,
}
else
{
- head = next;
- old_chain = make_cleanup_free_command_lines (&head);
+ head.reset (next);
}
tail = next;
}
dont_repeat ();
- if (head)
- {
- if (ret != invalid_control)
- {
- discard_cleanups (old_chain);
- }
- else
- do_cleanups (old_chain);
- }
+ if (ret == invalid_control)
+ return NULL;
return head;
}
*lptr = NULL;
}
-static void
-do_free_command_lines_cleanup (void *arg)
-{
- free_command_lines (arg);
-}
-
-struct cleanup *
-make_cleanup_free_command_lines (struct command_line **arg)
-{
- return make_cleanup (do_free_command_lines_cleanup, arg);
-}
-
-struct command_line *
+command_line_up
copy_command_lines (struct command_line *cmds)
{
struct command_line *result = NULL;
if (cmds)
{
- result = (struct command_line *) xmalloc (sizeof (struct command_line));
+ result = XNEW (struct command_line);
- result->next = copy_command_lines (cmds->next);
+ result->next = copy_command_lines (cmds->next).release ();
result->line = xstrdup (cmds->line);
result->control_type = cmds->control_type;
result->body_count = cmds->body_count;
{
int i;
- result->body_list = (struct command_line **)
- xmalloc (sizeof (struct command_line *) * cmds->body_count);
+ result->body_list = XNEWVEC (struct command_line *, cmds->body_count);
for (i = 0; i < cmds->body_count; i++)
- result->body_list[i] = copy_command_lines (cmds->body_list[i]);
+ result->body_list[i]
+ = copy_command_lines (cmds->body_list[i]).release ();
}
else
result->body_list = NULL;
}
- return result;
+ return command_line_up (result);
}
\f
/* Validate that *COMNAME is a valid name for a command. Return the
if (last_word != *comname)
{
struct cmd_list_element *c;
- char saved_char, *tem = *comname;
+ char saved_char;
+ const char *tem = *comname;
/* Separate the prefix and the command. */
saved_char = last_word[-1];
{
}
-void
+static void
define_command (char *comname, int from_tty)
{
#define MAX_TMPBUF 128
CMD_PRE_HOOK,
CMD_POST_HOOK
};
- struct command_line *cmds;
struct cmd_list_element *c, *newc, *hookc = 0, **list;
char *tem, *comfull;
+ const char *tem_c;
char tmpbuf[MAX_TMPBUF];
int hook_type = CMD_NO_HOOK;
int hook_name_size = 0;
list = validate_comname (&comname);
/* Look it up, and verify that we got an exact match. */
- tem = comname;
- c = lookup_cmd (&tem, *list, "", -1, 1);
+ tem_c = comname;
+ c = lookup_cmd (&tem_c, *list, "", -1, 1);
if (c && strcmp (comname, c->name) != 0)
c = 0;
{
int q;
- if (c->class == class_user || c->class == class_alias)
+ if (c->theclass == class_user || c->theclass == class_alias)
q = query (_("Redefine command \"%s\"? "), c->name);
else
q = query (_("Really redefine built-in command \"%s\"? "), c->name);
if (hook_type != CMD_NO_HOOK)
{
/* Look up cmd it hooks, and verify that we got an exact match. */
- tem = comname + hook_name_size;
- hookc = lookup_cmd (&tem, *list, "", -1, 0);
+ tem_c = comname + hook_name_size;
+ hookc = lookup_cmd (&tem_c, *list, "", -1, 0);
if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0)
hookc = 0;
if (!hookc)
{
- warning (_("Your new `%s' command does not hook any existing command."),
+ warning (_("Your new `%s' command does not "
+ "hook any existing command."),
comfull);
if (!query (_("Proceed? ")))
error (_("Not confirmed."));
if (isupper (*tem))
*tem = tolower (*tem);
- sprintf (tmpbuf, "Type commands for definition of \"%s\".", comfull);
- cmds = read_command_lines (tmpbuf, from_tty, 1, 0, 0);
+ xsnprintf (tmpbuf, sizeof (tmpbuf),
+ "Type commands for definition of \"%s\".", comfull);
+ command_line_up cmds = read_command_lines (tmpbuf, from_tty, 1, 0, 0);
- if (c && c->class == class_user)
+ if (c && c->theclass == class_user)
free_command_lines (&c->user_commands);
newc = add_cmd (comname, class_user, user_defined_command,
- (c && c->class == class_user)
+ (c && c->theclass == class_user)
? c->doc : xstrdup ("User-defined."), list);
- newc->user_commands = cmds;
+ newc->user_commands = cmds.release ();
/* If this new command is a hook, then mark both commands as being
tied. */
break;
case CMD_POST_HOOK:
hookc->hook_post = newc; /* Target gets hooked. */
- newc->hookee_post = hookc; /* We are marked as hooking target cmd. */
+ newc->hookee_post = hookc; /* We are marked as hooking
+ target cmd. */
break;
default:
/* Should never come here as hookc would be 0. */
}
}
-void
+static void
document_command (char *comname, int from_tty)
{
- struct command_line *doclines;
struct cmd_list_element *c, **list;
- char *tem, *comfull;
+ const char *tem;
+ char *comfull;
char tmpbuf[128];
comfull = comname;
tem = comname;
c = lookup_cmd (&tem, *list, "", 0, 1);
- if (c->class != class_user)
+ if (c->theclass != class_user)
error (_("Command \"%s\" is built-in."), comfull);
- sprintf (tmpbuf, "Type documentation for \"%s\".", comfull);
- doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0);
+ xsnprintf (tmpbuf, sizeof (tmpbuf), "Type documentation for \"%s\".",
+ comfull);
+ command_line_up doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0);
if (c->doc)
- xfree (c->doc);
+ xfree ((char *) c->doc);
{
struct command_line *cl1;
int len = 0;
+ char *doc;
- for (cl1 = doclines; cl1; cl1 = cl1->next)
+ for (cl1 = doclines.get (); cl1; cl1 = cl1->next)
len += strlen (cl1->line) + 1;
- c->doc = (char *) xmalloc (len + 1);
- *c->doc = 0;
+ doc = (char *) xmalloc (len + 1);
+ *doc = 0;
- for (cl1 = doclines; cl1; cl1 = cl1->next)
+ for (cl1 = doclines.get (); cl1; cl1 = cl1->next)
{
- strcat (c->doc, cl1->line);
+ strcat (doc, cl1->line);
if (cl1->next)
- strcat (c->doc, "\n");
+ strcat (doc, "\n");
}
- }
- free_command_lines (&doclines);
+ c->doc = doc;
+ }
}
\f
struct source_cleanup_lines_args
source_file_name = p->old_file;
}
-struct wrapped_read_command_file_args
-{
- FILE *stream;
-};
-
-static void
-wrapped_read_command_file (struct ui_out *uiout, void *data)
-{
- struct wrapped_read_command_file_args *args = data;
-
- read_command_file (args->stream);
-}
-
/* Used to implement source_command. */
void
if (stream == NULL)
internal_error (__FILE__, __LINE__, _("called with NULL file pointer!"));
- old_cleanups = make_cleanup_fclose (stream);
-
old_lines.old_line = source_line_number;
old_lines.old_file = source_file_name;
- make_cleanup (source_cleanup_lines, &old_lines);
+ old_cleanups = make_cleanup (source_cleanup_lines, &old_lines);
source_line_number = 0;
source_file_name = file;
- /* This will get set every time we read a line. So it won't stay ""
- for long. */
- error_pre_print = "";
{
- struct gdb_exception e;
- struct wrapped_read_command_file_args args;
+ scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0);
- args.stream = stream;
- e = catch_exception (uiout, wrapped_read_command_file, &args,
- RETURN_MASK_ERROR);
- switch (e.reason)
+ TRY
+ {
+ read_command_file (stream);
+ }
+ CATCH (e, RETURN_MASK_ERROR)
{
- case 0:
- break;
- case RETURN_ERROR:
/* Re-throw the error, but with the file name information
prepended. */
throw_error (e.error,
_("%s:%d: Error in sourced command file:\n%s"),
source_file_name, source_line_number, e.message);
- default:
- internal_error (__FILE__, __LINE__, _("bad reason"));
}
+ END_CATCH
}
do_cleanups (old_cleanups);
(recursively). PREFIX and NAME combined are the name of the
current command. */
void
-show_user_1 (struct cmd_list_element *c, char *prefix, char *name,
+show_user_1 (struct cmd_list_element *c, const char *prefix, const char *name,
struct ui_file *stream)
{
struct command_line *cmdlines;
if (c->prefixlist != NULL)
{
- char *prefixname = c->prefixname;
+ const char *prefixname = c->prefixname;
for (c = *c->prefixlist; c != NULL; c = c->next)
- if (c->class == class_user || c->prefixlist != NULL)
+ if (c->theclass == class_user || c->prefixlist != NULL)
show_user_1 (c, prefixname, c->name, gdb_stdout);
return;
}
cmdlines = c->user_commands;
- if (!cmdlines)
- return;
fprintf_filtered (stream, "User command \"%s%s\":\n", prefix, name);
- print_command_lines (uiout, cmdlines, 1);
+ if (!cmdlines)
+ return;
+ print_command_lines (current_uiout, cmdlines, 1);
fputs_filtered ("\n", stream);
}
+\f
+
+initialize_file_ftype _initialize_cli_script;
+
+void
+_initialize_cli_script (void)
+{
+ 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."));
+
+ 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."));
+}
projects / deliverable / binutils-gdb.git / blobdiff