1 /* Header for GDB line completion.
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #if !defined (COMPLETER_H)
23 /* Types of functions in struct match_list_displayer. */
25 struct match_list_displayer;
27 typedef void mld_crlf_ftype (const struct match_list_displayer *);
28 typedef void mld_putch_ftype (const struct match_list_displayer *, int);
29 typedef void mld_puts_ftype (const struct match_list_displayer *,
31 typedef void mld_flush_ftype (const struct match_list_displayer *);
32 typedef void mld_erase_entire_line_ftype (const struct match_list_displayer *);
33 typedef void mld_beep_ftype (const struct match_list_displayer *);
34 typedef int mld_read_key_ftype (const struct match_list_displayer *);
36 /* Interface between CLI/TUI and gdb_match_list_displayer. */
38 struct match_list_displayer
40 /* The screen dimensions to work with when displaying matches. */
46 /* Not "putc" to avoid issues where it is a stdio macro. Sigh. */
47 mld_putch_ftype *putch;
52 /* Flush all accumulated output. */
53 mld_flush_ftype *flush;
55 /* Erase the currently line on the terminal (but don't discard any text the
56 user has entered, readline may shortly re-print it). */
57 mld_erase_entire_line_ftype *erase_entire_line;
63 mld_read_key_ftype *read_key;
66 extern void gdb_display_match_list (char **matches, int len, int max,
67 const struct match_list_displayer *);
69 extern const char *get_max_completions_reached_message (void);
71 extern VEC (char_ptr) *complete_line (const char *text,
72 const char *line_buffer,
75 extern char *readline_line_completion_function (const char *text,
78 extern VEC (char_ptr) *noop_completer (struct cmd_list_element *,
79 const char *, const char *);
81 extern VEC (char_ptr) *filename_completer (struct cmd_list_element *,
82 const char *, const char *);
84 extern VEC (char_ptr) *expression_completer (struct cmd_list_element *,
85 const char *, const char *);
87 extern VEC (char_ptr) *location_completer (struct cmd_list_element *,
88 const char *, const char *);
90 extern VEC (char_ptr) *command_completer (struct cmd_list_element *,
91 const char *, const char *);
93 extern VEC (char_ptr) *signal_completer (struct cmd_list_element *,
94 const char *, const char *);
96 extern VEC (char_ptr) *reg_or_group_completer (struct cmd_list_element *,
97 const char *, const char *);
99 extern char *get_gdb_completer_quote_characters (void);
101 extern char *gdb_completion_word_break_characters (void);
103 /* Set the word break characters array to the corresponding set of
104 chars, based on FN. This function is useful for cases when the
105 completer doesn't know the type of the completion until some
106 calculation is done (e.g., for Python functions). */
108 extern void set_gdb_completion_word_break_characters (completer_ftype *fn);
110 /* Exported to linespec.c */
112 extern const char *skip_quoted_chars (const char *, const char *,
115 extern const char *skip_quoted (const char *);
117 /* Maximum number of candidates to consider before the completer
118 bails by throwing MAX_COMPLETIONS_REACHED_ERROR. Negative values
121 extern int max_completions;
123 /* Object to track how many unique completions have been generated.
124 Used to limit the size of generated completion lists. */
126 typedef htab_t completion_tracker_t;
128 /* Create a new completion tracker.
129 The result is a hash table to track added completions, or NULL
130 if max_completions <= 0. If max_completions < 0, tracking is disabled.
131 If max_completions == 0, the max is indeed zero. */
133 extern completion_tracker_t new_completion_tracker (void);
135 /* Make a cleanup to free a completion tracker, and reset its pointer
138 extern struct cleanup *make_cleanup_free_completion_tracker
139 (completion_tracker_t *tracker_ptr);
141 /* Return values for maybe_add_completion. */
143 enum maybe_add_completion_enum
145 /* NAME has been recorded and max_completions has not been reached,
146 or completion tracking is disabled (max_completions < 0). */
147 MAYBE_ADD_COMPLETION_OK,
149 /* NAME has been recorded and max_completions has been reached
150 (thus the caller can stop searching). */
151 MAYBE_ADD_COMPLETION_OK_MAX_REACHED,
153 /* max-completions entries has been reached.
154 Whether NAME is a duplicate or not is not determined. */
155 MAYBE_ADD_COMPLETION_MAX_REACHED,
157 /* NAME has already been recorded.
158 Note that this is never returned if completion tracking is disabled
159 (max_completions < 0). */
160 MAYBE_ADD_COMPLETION_DUPLICATE
163 /* Add the completion NAME to the list of generated completions if
164 it is not there already.
165 If max_completions is negative, nothing is done, not even watching
166 for duplicates, and MAYBE_ADD_COMPLETION_OK is always returned.
168 If MAYBE_ADD_COMPLETION_MAX_REACHED is returned, callers are required to
169 record at least one more completion. The final list will be pruned to
170 max_completions, but recording at least one more than max_completions is
171 the signal to the completion machinery that too many completions were
174 extern enum maybe_add_completion_enum
175 maybe_add_completion (completion_tracker_t tracker, char *name);
177 /* Wrapper to throw MAX_COMPLETIONS_REACHED_ERROR. */
179 extern void throw_max_completions_reached_error (void);
181 #endif /* defined (COMPLETER_H) */