191 lines
6.6 KiB
C
191 lines
6.6 KiB
C
/* Header for GDB line completion.
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Copyright (C) 2000-2017 Free Software Foundation, Inc.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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#if !defined (COMPLETER_H)
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#define COMPLETER_H 1
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#include "gdb_vecs.h"
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#include "command.h"
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/* Types of functions in struct match_list_displayer. */
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struct match_list_displayer;
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typedef void mld_crlf_ftype (const struct match_list_displayer *);
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typedef void mld_putch_ftype (const struct match_list_displayer *, int);
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typedef void mld_puts_ftype (const struct match_list_displayer *,
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const char *);
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typedef void mld_flush_ftype (const struct match_list_displayer *);
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typedef void mld_erase_entire_line_ftype (const struct match_list_displayer *);
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typedef void mld_beep_ftype (const struct match_list_displayer *);
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typedef int mld_read_key_ftype (const struct match_list_displayer *);
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/* Interface between CLI/TUI and gdb_match_list_displayer. */
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struct match_list_displayer
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{
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/* The screen dimensions to work with when displaying matches. */
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int height, width;
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/* Print cr,lf. */
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mld_crlf_ftype *crlf;
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/* Not "putc" to avoid issues where it is a stdio macro. Sigh. */
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mld_putch_ftype *putch;
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/* Print a string. */
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mld_puts_ftype *puts;
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/* Flush all accumulated output. */
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mld_flush_ftype *flush;
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/* Erase the currently line on the terminal (but don't discard any text the
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user has entered, readline may shortly re-print it). */
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mld_erase_entire_line_ftype *erase_entire_line;
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/* Ring the bell. */
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mld_beep_ftype *beep;
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/* Read one key. */
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mld_read_key_ftype *read_key;
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};
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extern void gdb_display_match_list (char **matches, int len, int max,
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const struct match_list_displayer *);
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extern const char *get_max_completions_reached_message (void);
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extern VEC (char_ptr) *complete_line (const char *text,
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const char *line_buffer,
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int point);
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extern char *readline_line_completion_function (const char *text,
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int matches);
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extern VEC (char_ptr) *noop_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *filename_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *expression_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *location_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *command_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *signal_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *reg_or_group_completer (struct cmd_list_element *,
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const char *, const char *);
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extern VEC (char_ptr) *reggroup_completer (struct cmd_list_element *,
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const char *, const char *);
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extern const char *get_gdb_completer_quote_characters (void);
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extern char *gdb_completion_word_break_characters (void);
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/* Set the word break characters array to BREAK_CHARS. This function
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is useful as const-correct alternative to direct assignment to
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rl_completer_word_break_characters, which is "char *",
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not "const char *". */
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extern void set_rl_completer_word_break_characters (const char *break_chars);
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/* Set the word break characters array to the corresponding set of
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chars, based on FN. This function is useful for cases when the
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completer doesn't know the type of the completion until some
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calculation is done (e.g., for Python functions). */
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extern void set_gdb_completion_word_break_characters (completer_ftype *fn);
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/* Exported to linespec.c */
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extern const char *skip_quoted_chars (const char *, const char *,
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const char *);
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extern const char *skip_quoted (const char *);
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/* Maximum number of candidates to consider before the completer
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bails by throwing MAX_COMPLETIONS_REACHED_ERROR. Negative values
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disable limiting. */
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extern int max_completions;
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/* Object to track how many unique completions have been generated.
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Used to limit the size of generated completion lists. */
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typedef htab_t completion_tracker_t;
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/* Create a new completion tracker.
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The result is a hash table to track added completions, or NULL
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if max_completions <= 0. If max_completions < 0, tracking is disabled.
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If max_completions == 0, the max is indeed zero. */
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extern completion_tracker_t new_completion_tracker (void);
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/* Make a cleanup to free a completion tracker, and reset its pointer
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to NULL. */
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extern struct cleanup *make_cleanup_free_completion_tracker
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(completion_tracker_t *tracker_ptr);
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/* Return values for maybe_add_completion. */
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enum maybe_add_completion_enum
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{
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/* NAME has been recorded and max_completions has not been reached,
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or completion tracking is disabled (max_completions < 0). */
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MAYBE_ADD_COMPLETION_OK,
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/* NAME has been recorded and max_completions has been reached
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(thus the caller can stop searching). */
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MAYBE_ADD_COMPLETION_OK_MAX_REACHED,
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/* max-completions entries has been reached.
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Whether NAME is a duplicate or not is not determined. */
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MAYBE_ADD_COMPLETION_MAX_REACHED,
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/* NAME has already been recorded.
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Note that this is never returned if completion tracking is disabled
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(max_completions < 0). */
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MAYBE_ADD_COMPLETION_DUPLICATE
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};
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/* Add the completion NAME to the list of generated completions if
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it is not there already.
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If max_completions is negative, nothing is done, not even watching
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for duplicates, and MAYBE_ADD_COMPLETION_OK is always returned.
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If MAYBE_ADD_COMPLETION_MAX_REACHED is returned, callers are required to
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record at least one more completion. The final list will be pruned to
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max_completions, but recording at least one more than max_completions is
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the signal to the completion machinery that too many completions were
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found. */
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extern enum maybe_add_completion_enum
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maybe_add_completion (completion_tracker_t tracker, char *name);
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/* Wrapper to throw MAX_COMPLETIONS_REACHED_ERROR. */
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extern void throw_max_completions_reached_error (void);
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#endif /* defined (COMPLETER_H) */
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