1315 lines
31 KiB
C
1315 lines
31 KiB
C
/* GDB CLI command scripting.
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Copyright 1986-2000 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "value.h"
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#include "language.h" /* For value_true */
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#include <ctype.h>
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#ifdef UI_OUT
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#include "ui-out.h"
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#endif
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#include "top.h"
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#include "cli/cli-cmds.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-script.h"
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/* From gdb/top.c */
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extern void dont_repeat (void);
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extern void do_restore_instream_cleanup (void *stream);
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/* Prototypes for local functions */
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static struct cleanup *
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make_cleanup_free_command_lines (struct command_line **arg);
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static enum command_control_type
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recurse_read_control_structure (struct command_line *current_cmd);
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static char *insert_args (char *line);
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static struct cleanup * setup_user_args (char *p);
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static void validate_comname (char *);
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/* Level of control structure. */
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static int control_level;
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/* Source command state variable. */
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static int source_error_allocated;
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/* Structure for arguments to user defined functions. */
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#define MAXUSERARGS 10
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struct user_args
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{
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struct user_args *next;
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struct
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{
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char *arg;
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int len;
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}
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a[MAXUSERARGS];
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int count;
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}
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*user_args;
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/* Allocate, initialize a new command line structure for one of the
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control commands (if/while). */
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static struct command_line *
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build_command_line (enum command_control_type type, char *args)
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{
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struct command_line *cmd;
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if (args == NULL)
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error ("if/while commands require arguments.\n");
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cmd = (struct command_line *) xmalloc (sizeof (struct command_line));
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cmd->next = NULL;
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cmd->control_type = type;
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cmd->body_count = 1;
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cmd->body_list
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= (struct command_line **) xmalloc (sizeof (struct command_line *)
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* cmd->body_count);
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memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count);
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cmd->line = savestring (args, strlen (args));
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return cmd;
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}
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/* Build and return a new command structure for the control commands
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such as "if" and "while". */
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static struct command_line *
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get_command_line (enum command_control_type type, char *arg)
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{
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struct command_line *cmd;
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struct cleanup *old_chain = NULL;
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/* Allocate and build a new command line structure. */
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cmd = build_command_line (type, arg);
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old_chain = make_cleanup_free_command_lines (&cmd);
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/* Read in the body of this command. */
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if (recurse_read_control_structure (cmd) == invalid_control)
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{
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warning ("error reading in control structure\n");
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do_cleanups (old_chain);
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return NULL;
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}
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discard_cleanups (old_chain);
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return cmd;
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}
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/* Recursively print a command (including full control structures). */
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#ifdef UI_OUT
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void
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print_command_lines (struct ui_out *uiout, struct command_line *cmd,
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unsigned int depth)
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{
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struct command_line *list;
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list = cmd;
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while (list)
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{
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if (depth)
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ui_out_spaces (uiout, 2 * depth);
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/* A simple command, print it and continue. */
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if (list->control_type == simple_control)
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{
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ui_out_field_string (uiout, NULL, list->line);
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ui_out_text (uiout, "\n");
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list = list->next;
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continue;
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}
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/* loop_continue to jump to the start of a while loop, print it
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and continue. */
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if (list->control_type == continue_control)
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{
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ui_out_field_string (uiout, NULL, "loop_continue");
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ui_out_text (uiout, "\n");
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list = list->next;
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continue;
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}
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/* loop_break to break out of a while loop, print it and continue. */
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if (list->control_type == break_control)
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{
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ui_out_field_string (uiout, NULL, "loop_break");
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ui_out_text (uiout, "\n");
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list = list->next;
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continue;
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}
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/* A while command. Recursively print its subcommands and continue. */
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if (list->control_type == while_control)
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{
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ui_out_text (uiout, "while ");
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ui_out_field_fmt (uiout, NULL, "while %s", list->line);
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ui_out_text (uiout, "\n");
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print_command_lines (uiout, *list->body_list, depth + 1);
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ui_out_field_string (uiout, NULL, "end");
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if (depth)
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ui_out_spaces (uiout, 2 * depth);
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ui_out_text (uiout, "end\n");
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list = list->next;
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continue;
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}
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/* An if command. Recursively print both arms before continueing. */
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if (list->control_type == if_control)
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{
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ui_out_text (uiout, "if ");
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ui_out_field_fmt (uiout, NULL, "if %s", list->line);
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ui_out_text (uiout, "\n");
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/* The true arm. */
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print_command_lines (uiout, list->body_list[0], depth + 1);
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/* Show the false arm if it exists. */
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if (list->body_count == 2)
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{
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if (depth)
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ui_out_spaces (uiout, 2 * depth);
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ui_out_field_string (uiout, NULL, "else");
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ui_out_text (uiout, "else\n");
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print_command_lines (uiout, list->body_list[1], depth + 1);
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}
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ui_out_field_string (uiout, NULL, "end");
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if (depth)
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ui_out_spaces (uiout, 2 * depth);
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ui_out_text (uiout, "end\n");
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list = list->next;
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continue;
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}
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/* ignore illegal command type and try next */
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list = list->next;
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} /* while (list) */
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}
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#else
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void
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print_command_line (struct command_line *cmd, unsigned int depth,
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struct ui_file *stream)
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{
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unsigned int i;
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if (depth)
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{
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for (i = 0; i < depth; i++)
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fputs_filtered (" ", stream);
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}
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/* A simple command, print it and return. */
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if (cmd->control_type == simple_control)
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{
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fputs_filtered (cmd->line, stream);
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fputs_filtered ("\n", stream);
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return;
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}
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/* loop_continue to jump to the start of a while loop, print it
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and return. */
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if (cmd->control_type == continue_control)
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{
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fputs_filtered ("loop_continue\n", stream);
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return;
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}
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/* loop_break to break out of a while loop, print it and return. */
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if (cmd->control_type == break_control)
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{
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fputs_filtered ("loop_break\n", stream);
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return;
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}
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/* A while command. Recursively print its subcommands before returning. */
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if (cmd->control_type == while_control)
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{
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struct command_line *list;
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fputs_filtered ("while ", stream);
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fputs_filtered (cmd->line, stream);
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fputs_filtered ("\n", stream);
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list = *cmd->body_list;
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while (list)
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{
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print_command_line (list, depth + 1, stream);
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list = list->next;
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}
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}
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/* An if command. Recursively print both arms before returning. */
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if (cmd->control_type == if_control)
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{
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fputs_filtered ("if ", stream);
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fputs_filtered (cmd->line, stream);
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fputs_filtered ("\n", stream);
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/* The true arm. */
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print_command_line (cmd->body_list[0], depth + 1, stream);
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/* Show the false arm if it exists. */
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if (cmd->body_count == 2)
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{
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if (depth)
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{
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for (i = 0; i < depth; i++)
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fputs_filtered (" ", stream);
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}
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fputs_filtered ("else\n", stream);
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print_command_line (cmd->body_list[1], depth + 1, stream);
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}
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if (depth)
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{
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for (i = 0; i < depth; i++)
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fputs_filtered (" ", stream);
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}
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fputs_filtered ("end\n", stream);
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}
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}
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#endif
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/* Execute the command in CMD. */
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void
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execute_user_command (struct cmd_list_element *c, char *args)
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{
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register struct command_line *cmdlines;
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struct cleanup *old_chain;
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enum command_control_type ret;
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old_chain = setup_user_args (args);
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cmdlines = c->user_commands;
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if (cmdlines == 0)
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/* Null command */
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return;
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/* Set the instream to 0, indicating execution of a
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user-defined function. */
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old_chain = make_cleanup (do_restore_instream_cleanup, instream);
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instream = (FILE *) 0;
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while (cmdlines)
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{
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ret = execute_control_command (cmdlines);
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if (ret != simple_control && ret != break_control)
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{
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warning ("Error in control structure.\n");
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break;
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}
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cmdlines = cmdlines->next;
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}
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do_cleanups (old_chain);
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}
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enum command_control_type
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execute_control_command (struct command_line *cmd)
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{
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struct expression *expr;
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struct command_line *current;
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struct cleanup *old_chain = 0;
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value_ptr val;
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value_ptr val_mark;
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int loop;
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enum command_control_type ret;
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char *new_line;
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switch (cmd->control_type)
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{
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case simple_control:
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/* A simple command, execute it and return. */
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new_line = insert_args (cmd->line);
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if (!new_line)
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return invalid_control;
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old_chain = make_cleanup (free_current_contents, &new_line);
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execute_command (new_line, 0);
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ret = cmd->control_type;
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break;
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case continue_control:
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case break_control:
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/* Return for "continue", and "break" so we can either
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continue the loop at the top, or break out. */
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ret = cmd->control_type;
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break;
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case while_control:
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{
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/* Parse the loop control expression for the while statement. */
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new_line = insert_args (cmd->line);
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if (!new_line)
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return invalid_control;
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old_chain = make_cleanup (free_current_contents, &new_line);
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expr = parse_expression (new_line);
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make_cleanup (free_current_contents, &expr);
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ret = simple_control;
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loop = 1;
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/* Keep iterating so long as the expression is true. */
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while (loop == 1)
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{
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int cond_result;
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QUIT;
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/* Evaluate the expression. */
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val_mark = value_mark ();
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val = evaluate_expression (expr);
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cond_result = value_true (val);
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value_free_to_mark (val_mark);
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/* If the value is false, then break out of the loop. */
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if (!cond_result)
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break;
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/* Execute the body of the while statement. */
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current = *cmd->body_list;
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while (current)
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{
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ret = execute_control_command (current);
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/* If we got an error, or a "break" command, then stop
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looping. */
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if (ret == invalid_control || ret == break_control)
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{
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loop = 0;
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break;
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}
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/* If we got a "continue" command, then restart the loop
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at this point. */
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if (ret == continue_control)
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break;
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/* Get the next statement. */
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current = current->next;
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}
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}
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/* Reset RET so that we don't recurse the break all the way down. */
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if (ret == break_control)
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ret = simple_control;
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break;
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}
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case if_control:
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{
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new_line = insert_args (cmd->line);
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if (!new_line)
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return invalid_control;
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old_chain = make_cleanup (free_current_contents, &new_line);
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/* Parse the conditional for the if statement. */
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expr = parse_expression (new_line);
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make_cleanup (free_current_contents, &expr);
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current = NULL;
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ret = simple_control;
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/* Evaluate the conditional. */
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val_mark = value_mark ();
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val = evaluate_expression (expr);
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/* Choose which arm to take commands from based on the value of the
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conditional expression. */
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if (value_true (val))
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current = *cmd->body_list;
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else if (cmd->body_count == 2)
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current = *(cmd->body_list + 1);
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value_free_to_mark (val_mark);
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/* Execute commands in the given arm. */
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while (current)
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{
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ret = execute_control_command (current);
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/* If we got an error, get out. */
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if (ret != simple_control)
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break;
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/* Get the next statement in the body. */
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current = current->next;
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||
}
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||
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break;
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}
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default:
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warning ("Invalid control type in command structure.");
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return invalid_control;
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||
}
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||
|
||
if (old_chain)
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||
do_cleanups (old_chain);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* "while" command support. Executes a body of statements while the
|
||
loop condition is nonzero. */
|
||
|
||
void
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||
while_command (char *arg, int from_tty)
|
||
{
|
||
struct command_line *command = NULL;
|
||
|
||
control_level = 1;
|
||
command = get_command_line (while_control, arg);
|
||
|
||
if (command == NULL)
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||
return;
|
||
|
||
execute_control_command (command);
|
||
free_command_lines (&command);
|
||
}
|
||
|
||
/* "if" command support. Execute either the true or false arm depending
|
||
on the value of the if conditional. */
|
||
|
||
void
|
||
if_command (char *arg, int from_tty)
|
||
{
|
||
struct command_line *command = NULL;
|
||
|
||
control_level = 1;
|
||
command = get_command_line (if_control, arg);
|
||
|
||
if (command == NULL)
|
||
return;
|
||
|
||
execute_control_command (command);
|
||
free_command_lines (&command);
|
||
}
|
||
|
||
/* Cleanup */
|
||
static void
|
||
arg_cleanup (void *ignore)
|
||
{
|
||
struct user_args *oargs = user_args;
|
||
if (!user_args)
|
||
internal_error ("Internal error, arg_cleanup called with no user args.\n");
|
||
|
||
user_args = user_args->next;
|
||
xfree (oargs);
|
||
}
|
||
|
||
/* Bind the incomming arguments for a user defined command to
|
||
$arg0, $arg1 ... $argMAXUSERARGS. */
|
||
|
||
static struct cleanup *
|
||
setup_user_args (char *p)
|
||
{
|
||
struct user_args *args;
|
||
struct cleanup *old_chain;
|
||
unsigned int arg_count = 0;
|
||
|
||
args = (struct user_args *) xmalloc (sizeof (struct user_args));
|
||
memset (args, 0, sizeof (struct user_args));
|
||
|
||
args->next = user_args;
|
||
user_args = args;
|
||
|
||
old_chain = make_cleanup (arg_cleanup, 0/*ignored*/);
|
||
|
||
if (p == NULL)
|
||
return old_chain;
|
||
|
||
while (*p)
|
||
{
|
||
char *start_arg;
|
||
int squote = 0;
|
||
int dquote = 0;
|
||
int bsquote = 0;
|
||
|
||
if (arg_count >= MAXUSERARGS)
|
||
{
|
||
error ("user defined function may only have %d arguments.\n",
|
||
MAXUSERARGS);
|
||
return old_chain;
|
||
}
|
||
|
||
/* Strip whitespace. */
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
|
||
/* P now points to an argument. */
|
||
start_arg = p;
|
||
user_args->a[arg_count].arg = p;
|
||
|
||
/* Get to the end of this argument. */
|
||
while (*p)
|
||
{
|
||
if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote)
|
||
break;
|
||
else
|
||
{
|
||
if (bsquote)
|
||
bsquote = 0;
|
||
else if (*p == '\\')
|
||
bsquote = 1;
|
||
else if (squote)
|
||
{
|
||
if (*p == '\'')
|
||
squote = 0;
|
||
}
|
||
else if (dquote)
|
||
{
|
||
if (*p == '"')
|
||
dquote = 0;
|
||
}
|
||
else
|
||
{
|
||
if (*p == '\'')
|
||
squote = 1;
|
||
else if (*p == '"')
|
||
dquote = 1;
|
||
}
|
||
p++;
|
||
}
|
||
}
|
||
|
||
user_args->a[arg_count].len = p - start_arg;
|
||
arg_count++;
|
||
user_args->count++;
|
||
}
|
||
return old_chain;
|
||
}
|
||
|
||
/* Given character string P, return a point to the first argument ($arg),
|
||
or NULL if P contains no arguments. */
|
||
|
||
static char *
|
||
locate_arg (char *p)
|
||
{
|
||
while ((p = strchr (p, '$')))
|
||
{
|
||
if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4]))
|
||
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. */
|
||
|
||
static char *
|
||
insert_args (char *line)
|
||
{
|
||
char *p, *save_line, *new_line;
|
||
unsigned len, i;
|
||
|
||
/* 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 (i >= user_args->count)
|
||
{
|
||
error ("Missing argument %d in user function.\n", i);
|
||
return NULL;
|
||
}
|
||
len += user_args->a[i].len;
|
||
line = p + 5;
|
||
}
|
||
|
||
/* Don't forget the tail. */
|
||
len += strlen (line);
|
||
|
||
/* Allocate space for the new line and fill it in. */
|
||
new_line = (char *) xmalloc (len + 1);
|
||
if (new_line == NULL)
|
||
return NULL;
|
||
|
||
/* Restore pointer to beginning of old line. */
|
||
line = save_line;
|
||
|
||
/* Save pointer to beginning of new line. */
|
||
save_line = new_line;
|
||
|
||
while ((p = locate_arg (line)))
|
||
{
|
||
int i, len;
|
||
|
||
memcpy (new_line, line, p - line);
|
||
new_line += p - line;
|
||
i = p[4] - '0';
|
||
|
||
len = user_args->a[i].len;
|
||
if (len)
|
||
{
|
||
memcpy (new_line, user_args->a[i].arg, len);
|
||
new_line += len;
|
||
}
|
||
line = p + 5;
|
||
}
|
||
/* Don't forget the tail. */
|
||
strcpy (new_line, line);
|
||
|
||
/* Return a pointer to the beginning of the new line. */
|
||
return save_line;
|
||
}
|
||
|
||
|
||
/* 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 (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);
|
||
|
||
xfree (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 (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 (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 (char *prompt_arg, 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_arg, END_MESSAGE);
|
||
}
|
||
else if (from_tty && input_from_terminal_p ())
|
||
{
|
||
printf_unfiltered ("%s\n%s\n", prompt_arg, 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_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 (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;
|
||
xfree (l->line);
|
||
xfree (l);
|
||
l = next;
|
||
}
|
||
}
|
||
|
||
static void
|
||
do_free_command_lines_cleanup (void *arg)
|
||
{
|
||
free_command_lines (arg);
|
||
}
|
||
|
||
static struct cleanup *
|
||
make_cleanup_free_command_lines (struct command_line **arg)
|
||
{
|
||
return make_cleanup (do_free_command_lines_cleanup, arg);
|
||
}
|
||
|
||
static void
|
||
validate_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 (char *ignore, int from_tty)
|
||
{
|
||
}
|
||
|
||
void
|
||
define_command (char *comname, int from_tty)
|
||
{
|
||
#define MAX_TMPBUF 128
|
||
enum cmd_hook_type
|
||
{
|
||
CMD_NO_HOOK = 0,
|
||
CMD_PRE_HOOK,
|
||
CMD_POST_HOOK
|
||
};
|
||
register struct command_line *cmds;
|
||
register struct cmd_list_element *c, *newc, *oldc, *hookc = 0;
|
||
char *tem = comname;
|
||
char *tem2;
|
||
char tmpbuf[MAX_TMPBUF];
|
||
int hook_type = CMD_NO_HOOK;
|
||
int hook_name_size = 0;
|
||
|
||
#define HOOK_STRING "hook-"
|
||
#define HOOK_LEN 5
|
||
#define HOOK_POST_STRING "hookpost-"
|
||
#define HOOK_POST_LEN 9
|
||
|
||
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))
|
||
{
|
||
hook_type = CMD_PRE_HOOK;
|
||
hook_name_size = HOOK_LEN;
|
||
}
|
||
else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN))
|
||
{
|
||
hook_type = CMD_POST_HOOK;
|
||
hook_name_size = HOOK_POST_LEN;
|
||
}
|
||
|
||
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, cmdlist, "", -1, 0);
|
||
if (hookc && !STREQ (comname + hook_name_size, 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)
|
||
{
|
||
switch (hook_type)
|
||
{
|
||
case CMD_PRE_HOOK:
|
||
hookc->hook_pre = newc; /* Target gets hooked. */
|
||
newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */
|
||
break;
|
||
case CMD_POST_HOOK:
|
||
hookc->hook_pre = newc; /* Target gets hooked. */
|
||
newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */
|
||
break;
|
||
default:
|
||
/* Should never come here as hookc would be 0. */
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
document_command (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)
|
||
xfree (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);
|
||
}
|
||
|
||
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 (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 */
|
||
static void
|
||
do_fclose_cleanup (void *stream)
|
||
{
|
||
fclose (stream);
|
||
}
|
||
|
||
/* Used to implement source_command */
|
||
|
||
void
|
||
script_from_file (FILE *stream, char *file)
|
||
{
|
||
struct cleanup *old_cleanups;
|
||
struct source_cleanup_lines_args old_lines;
|
||
int needed_length;
|
||
|
||
if (stream == NULL)
|
||
{
|
||
internal_error ("called with NULL file pointer!");
|
||
}
|
||
|
||
old_cleanups = make_cleanup (do_fclose_cleanup, 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 (xfree, 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);
|
||
}
|
||
|
||
void
|
||
show_user_1 (struct cmd_list_element *c, struct ui_file *stream)
|
||
{
|
||
register struct command_line *cmdlines;
|
||
|
||
cmdlines = c->user_commands;
|
||
if (!cmdlines)
|
||
return;
|
||
fputs_filtered ("User command ", stream);
|
||
fputs_filtered (c->name, stream);
|
||
fputs_filtered (":\n", stream);
|
||
|
||
#ifdef UI_OUT
|
||
print_command_lines (uiout, cmdlines, 1);
|
||
fputs_filtered ("\n", stream);
|
||
#else
|
||
while (cmdlines)
|
||
{
|
||
print_command_line (cmdlines, 4, stream);
|
||
cmdlines = cmdlines->next;
|
||
}
|
||
fputs_filtered ("\n", stream);
|
||
#endif
|
||
}
|
||
|