| /* GDB CLI command scripting. |
| |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software |
| Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "value.h" |
| #include "language.h" /* For value_true */ |
| #include <ctype.h> |
| |
| #include "ui-out.h" |
| #include "gdb_string.h" |
| |
| #include "top.h" |
| #include "cli/cli-cmds.h" |
| #include "cli/cli-decode.h" |
| #include "cli/cli-script.h" |
| |
| /* From gdb/top.c */ |
| |
| extern void dont_repeat (void); |
| |
| extern void do_restore_instream_cleanup (void *stream); |
| |
| /* Prototypes for local functions */ |
| |
| static struct cleanup * |
| make_cleanup_free_command_lines (struct command_line **arg); |
| |
| static enum command_control_type |
| recurse_read_control_structure (struct command_line *current_cmd); |
| |
| static char *insert_args (char *line); |
| |
| static struct cleanup * setup_user_args (char *p); |
| |
| static void validate_comname (char *); |
| |
| /* Level of control structure. */ |
| static int control_level; |
| |
| /* Source command state variable. */ |
| static int source_error_allocated; |
| |
| /* Structure for arguments to user defined functions. */ |
| #define MAXUSERARGS 10 |
| struct user_args |
| { |
| struct user_args *next; |
| struct |
| { |
| char *arg; |
| int len; |
| } |
| a[MAXUSERARGS]; |
| int count; |
| } |
| *user_args; |
| |
| |
| /* 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) |
| { |
| struct command_line *cmd; |
| |
| if (args == NULL) |
| error ("if/while commands require arguments.\n"); |
| |
| cmd = (struct command_line *) xmalloc (sizeof (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->line = savestring (args, strlen (args)); |
| return cmd; |
| } |
| |
| /* Build and return a new command structure for the control commands |
| such as "if" and "while". */ |
| |
| static struct command_line * |
| get_command_line (enum command_control_type type, 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); |
| |
| /* Read in the body of this command. */ |
| if (recurse_read_control_structure (cmd) == invalid_control) |
| { |
| warning ("error reading in control structure\n"); |
| do_cleanups (old_chain); |
| return NULL; |
| } |
| |
| discard_cleanups (old_chain); |
| return cmd; |
| } |
| |
| /* Recursively print a command (including full control structures). */ |
| |
| void |
| print_command_lines (struct ui_out *uiout, struct command_line *cmd, |
| unsigned int depth) |
| { |
| struct command_line *list; |
| |
| list = cmd; |
| while (list) |
| { |
| |
| if (depth) |
| ui_out_spaces (uiout, 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"); |
| list = list->next; |
| continue; |
| } |
| |
| /* loop_continue to jump to the start of a while loop, print it |
| and continue. */ |
| if (list->control_type == continue_control) |
| { |
| ui_out_field_string (uiout, NULL, "loop_continue"); |
| ui_out_text (uiout, "\n"); |
| list = list->next; |
| continue; |
| } |
| |
| /* loop_break to break out of a while loop, print it and continue. */ |
| if (list->control_type == break_control) |
| { |
| ui_out_field_string (uiout, NULL, "loop_break"); |
| ui_out_text (uiout, "\n"); |
| list = list->next; |
| continue; |
| } |
| |
| /* A while command. Recursively print its subcommands and continue. */ |
| if (list->control_type == while_control) |
| { |
| ui_out_field_fmt (uiout, NULL, "while %s", list->line); |
| ui_out_text (uiout, "\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"); |
| list = list->next; |
| continue; |
| } |
| |
| /* An if command. Recursively print both arms before continueing. */ |
| if (list->control_type == if_control) |
| { |
| ui_out_field_fmt (uiout, NULL, "if %s", list->line); |
| ui_out_text (uiout, "\n"); |
| /* The true arm. */ |
| print_command_lines (uiout, list->body_list[0], depth + 1); |
| |
| /* Show the false arm if it exists. */ |
| 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"); |
| 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"); |
| list = list->next; |
| continue; |
| } |
| |
| /* ignore illegal command type and try next */ |
| list = list->next; |
| } /* while (list) */ |
| } |
| |
| /* Handle pre-post hooks. */ |
| |
| void |
| clear_hook_in_cleanup (void *data) |
| { |
| struct cmd_list_element *c = data; |
| c->hook_in = 0; /* Allow hook to work again once it is complete */ |
| } |
| |
| void |
| execute_cmd_pre_hook (struct cmd_list_element *c) |
| { |
| if ((c->hook_pre) && (!c->hook_in)) |
| { |
| struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); |
| c->hook_in = 1; /* Prevent recursive hooking */ |
| execute_user_command (c->hook_pre, (char *) 0); |
| do_cleanups (cleanups); |
| } |
| } |
| |
| void |
| execute_cmd_post_hook (struct cmd_list_element *c) |
| { |
| if ((c->hook_post) && (!c->hook_in)) |
| { |
| struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); |
| c->hook_in = 1; /* Prevent recursive hooking */ |
| execute_user_command (c->hook_post, (char *) 0); |
| do_cleanups (cleanups); |
| } |
| } |
| |
| /* Execute the command in CMD. */ |
| void |
| do_restore_user_call_depth (void * call_depth) |
| { |
| int * depth = call_depth; |
| /* We will be returning_to_top_level() at this point, so we want to |
| reset our depth. */ |
| (*depth) = 0; |
| } |
| |
| |
| void |
| execute_user_command (struct cmd_list_element *c, char *args) |
| { |
| register 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); |
| |
| cmdlines = c->user_commands; |
| if (cmdlines == 0) |
| /* Null command */ |
| return; |
| |
| if (++user_call_depth > max_user_call_depth) |
| error ("Max user call depth exceeded -- command aborted\n"); |
| |
| old_chain = make_cleanup (do_restore_user_call_depth, &user_call_depth); |
| |
| /* Set the instream to 0, indicating execution of a |
| user-defined function. */ |
| old_chain = make_cleanup (do_restore_instream_cleanup, instream); |
| instream = (FILE *) 0; |
| while (cmdlines) |
| { |
| ret = execute_control_command (cmdlines); |
| if (ret != simple_control && ret != break_control) |
| { |
| warning ("Error in control structure.\n"); |
| break; |
| } |
| cmdlines = cmdlines->next; |
| } |
| do_cleanups (old_chain); |
| |
| user_call_depth--; |
| } |
| |
| enum command_control_type |
| execute_control_command (struct command_line *cmd) |
| { |
| struct expression *expr; |
| struct command_line *current; |
| struct cleanup *old_chain = 0; |
| struct value *val; |
| struct value *val_mark; |
| int loop; |
| enum command_control_type ret; |
| char *new_line; |
| |
| switch (cmd->control_type) |
| { |
| case simple_control: |
| /* A simple command, execute it and return. */ |
| new_line = insert_args (cmd->line); |
| if (!new_line) |
| return invalid_control; |
| old_chain = make_cleanup (free_current_contents, &new_line); |
| execute_command (new_line, 0); |
| ret = cmd->control_type; |
| break; |
| |
| case continue_control: |
| case break_control: |
| /* Return for "continue", and "break" so we can either |
| continue the loop at the top, or break out. */ |
| ret = cmd->control_type; |
| break; |
| |
| case while_control: |
| { |
| /* Parse the loop control expression for the while statement. */ |
| new_line = insert_args (cmd->line); |
| if (!new_line) |
| return invalid_control; |
| old_chain = make_cleanup (free_current_contents, &new_line); |
| expr = parse_expression (new_line); |
| make_cleanup (free_current_contents, &expr); |
| |
| ret = simple_control; |
| loop = 1; |
| |
| /* Keep iterating so long as the expression is true. */ |
| while (loop == 1) |
| { |
| int cond_result; |
| |
| QUIT; |
| |
| /* Evaluate the expression. */ |
| val_mark = value_mark (); |
| val = evaluate_expression (expr); |
| cond_result = value_true (val); |
| value_free_to_mark (val_mark); |
| |
| /* If the value is false, then break out of the loop. */ |
| if (!cond_result) |
| break; |
| |
| /* Execute the body of the while statement. */ |
| current = *cmd->body_list; |
| while (current) |
| { |
| ret = execute_control_command (current); |
| |
| /* If we got an error, or a "break" command, then stop |
| looping. */ |
| if (ret == invalid_control || ret == break_control) |
| { |
| loop = 0; |
| break; |
| } |
| |
| /* If we got a "continue" command, then restart the loop |
| at this point. */ |
| if (ret == continue_control) |
| break; |
| |
| /* Get the next statement. */ |
| current = current->next; |
| } |
| } |
| |
| /* Reset RET so that we don't recurse the break all the way down. */ |
| if (ret == break_control) |
| ret = simple_control; |
| |
| break; |
| } |
| |
| case if_control: |
| { |
| new_line = insert_args (cmd->line); |
| if (!new_line) |
| return invalid_control; |
| old_chain = 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); |
| |
| current = NULL; |
| ret = simple_control; |
| |
| /* Evaluate the conditional. */ |
| val_mark = value_mark (); |
| val = evaluate_expression (expr); |
| |
| /* Choose which arm to take commands from based on the value of the |
| conditional expression. */ |
| if (value_true (val)) |
| current = *cmd->body_list; |
| else if (cmd->body_count == 2) |
| current = *(cmd->body_list + 1); |
| value_free_to_mark (val_mark); |
| |
| /* Execute commands in the given arm. */ |
| while (current) |
| { |
| ret = execute_control_command (current); |
| |
| /* If we got an error, get out. */ |
| if (ret != simple_control) |
| break; |
| |
| /* Get the next statement in the body. */ |
| current = current->next; |
| } |
| |
| break; |
| } |
| |
| default: |
| warning ("Invalid control type in command structure."); |
| return invalid_control; |
| } |
| |
| if (old_chain) |
| do_cleanups (old_chain); |
| |
| return ret; |
| } |
| |
| /* "while" command support. Executes a body of statements while the |
| loop condition is nonzero. */ |
| |
| void |
| 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) |
| 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 (__FILE__, __LINE__, |
| "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; |
| } |
| *lptr = NULL; |
| } |
| |
| 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_post = newc; /* Target gets hooked. */ |
| newc->hookee_post = hookc; /* We are marked as hooking target cmd. */ |
| break; |
| default: |
| /* Should never come here as hookc would be 0. */ |
| internal_error (__FILE__, __LINE__, "bad switch"); |
| } |
| } |
| } |
| |
| 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 (__FILE__, __LINE__, "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); |
| |
| print_command_lines (uiout, cmdlines, 1); |
| fputs_filtered ("\n", stream); |
| } |
| |