1751 lines
49 KiB
C
1751 lines
49 KiB
C
/* Line completion stuff for GDB, the GNU debugger.
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Copyright (C) 2000-2015 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 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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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "filenames.h" /* For DOSish file names. */
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#include "language.h"
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#include "gdb_signals.h"
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#include "target.h"
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#include "reggroups.h"
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#include "user-regs.h"
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#include "cli/cli-decode.h"
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/* FIXME: This is needed because of lookup_cmd_1 (). We should be
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calling a hook instead so we eliminate the CLI dependency. */
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#include "gdbcmd.h"
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/* Needed for rl_completer_word_break_characters() and for
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rl_filename_completion_function. */
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#include "readline/readline.h"
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/* readline defines this. */
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#undef savestring
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#include "completer.h"
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/* Prototypes for local functions. */
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static
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char *line_completion_function (const char *text, int matches,
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char *line_buffer,
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int point);
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/* readline uses the word breaks for two things:
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(1) In figuring out where to point the TEXT parameter to the
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rl_completion_entry_function. Since we don't use TEXT for much,
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it doesn't matter a lot what the word breaks are for this purpose,
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but it does affect how much stuff M-? lists.
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(2) If one of the matches contains a word break character, readline
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will quote it. That's why we switch between
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current_language->la_word_break_characters() and
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gdb_completer_command_word_break_characters. I'm not sure when
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we need this behavior (perhaps for funky characters in C++
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symbols?). */
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/* Variables which are necessary for fancy command line editing. */
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/* When completing on command names, we remove '-' from the list of
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word break characters, since we use it in command names. If the
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readline library sees one in any of the current completion strings,
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it thinks that the string needs to be quoted and automatically
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supplies a leading quote. */
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static char *gdb_completer_command_word_break_characters =
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" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
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/* When completing on file names, we remove from the list of word
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break characters any characters that are commonly used in file
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names, such as '-', '+', '~', etc. Otherwise, readline displays
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incorrect completion candidates. */
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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/* MS-DOS and MS-Windows use colon as part of the drive spec, and most
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programs support @foo style response files. */
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static char *gdb_completer_file_name_break_characters = " \t\n*|\"';?><@";
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#else
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static char *gdb_completer_file_name_break_characters = " \t\n*|\"';:?><";
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#endif
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/* Characters that can be used to quote completion strings. Note that
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we can't include '"' because the gdb C parser treats such quoted
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sequences as strings. */
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static char *gdb_completer_quote_characters = "'";
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/* Accessor for some completer data that may interest other files. */
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char *
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get_gdb_completer_quote_characters (void)
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{
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return gdb_completer_quote_characters;
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}
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/* Line completion interface function for readline. */
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char *
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readline_line_completion_function (const char *text, int matches)
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{
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return line_completion_function (text, matches,
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rl_line_buffer, rl_point);
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}
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/* This can be used for functions which don't want to complete on
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symbols but don't want to complete on anything else either. */
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VEC (char_ptr) *
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noop_completer (struct cmd_list_element *ignore,
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const char *text, const char *prefix)
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{
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return NULL;
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}
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/* Complete on filenames. */
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VEC (char_ptr) *
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filename_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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int subsequent_name;
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VEC (char_ptr) *return_val = NULL;
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subsequent_name = 0;
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while (1)
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{
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char *p, *q;
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p = rl_filename_completion_function (text, subsequent_name);
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if (p == NULL)
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break;
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/* We need to set subsequent_name to a non-zero value before the
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continue line below, because otherwise, if the first file
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seen by GDB is a backup file whose name ends in a `~', we
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will loop indefinitely. */
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subsequent_name = 1;
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/* Like emacs, don't complete on old versions. Especially
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useful in the "source" command. */
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if (p[strlen (p) - 1] == '~')
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{
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xfree (p);
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continue;
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}
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if (word == text)
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/* Return exactly p. */
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q = p;
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else if (word > text)
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{
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/* Return some portion of p. */
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q = xmalloc (strlen (p) + 5);
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strcpy (q, p + (word - text));
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xfree (p);
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}
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else
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{
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/* Return some of TEXT plus p. */
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q = xmalloc (strlen (p) + (text - word) + 5);
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strncpy (q, word, text - word);
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q[text - word] = '\0';
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strcat (q, p);
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xfree (p);
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}
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VEC_safe_push (char_ptr, return_val, q);
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}
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#if 0
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/* There is no way to do this just long enough to affect quote
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inserting without also affecting the next completion. This
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should be fixed in readline. FIXME. */
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/* Ensure that readline does the right thing
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with respect to inserting quotes. */
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rl_completer_word_break_characters = "";
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#endif
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return return_val;
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}
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/* Complete on locations, which might be of two possible forms:
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file:line
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or
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symbol+offset
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This is intended to be used in commands that set breakpoints
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etc. */
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VEC (char_ptr) *
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location_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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int n_syms, n_files, ix;
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VEC (char_ptr) *fn_list = NULL;
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VEC (char_ptr) *list = NULL;
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const char *p;
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int quote_found = 0;
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int quoted = *text == '\'' || *text == '"';
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int quote_char = '\0';
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const char *colon = NULL;
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char *file_to_match = NULL;
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const char *symbol_start = text;
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const char *orig_text = text;
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size_t text_len;
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/* Do we have an unquoted colon, as in "break foo.c:bar"? */
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for (p = text; *p != '\0'; ++p)
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{
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if (*p == '\\' && p[1] == '\'')
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p++;
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else if (*p == '\'' || *p == '"')
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{
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quote_found = *p;
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quote_char = *p++;
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while (*p != '\0' && *p != quote_found)
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{
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if (*p == '\\' && p[1] == quote_found)
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p++;
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p++;
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}
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if (*p == quote_found)
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quote_found = 0;
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else
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break; /* Hit the end of text. */
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}
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#if HAVE_DOS_BASED_FILE_SYSTEM
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/* If we have a DOS-style absolute file name at the beginning of
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TEXT, and the colon after the drive letter is the only colon
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we found, pretend the colon is not there. */
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else if (p < text + 3 && *p == ':' && p == text + 1 + quoted)
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;
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#endif
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else if (*p == ':' && !colon)
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{
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colon = p;
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symbol_start = p + 1;
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}
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else if (strchr (current_language->la_word_break_characters(), *p))
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symbol_start = p + 1;
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}
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if (quoted)
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text++;
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text_len = strlen (text);
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/* Where is the file name? */
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if (colon)
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{
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char *s;
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file_to_match = (char *) xmalloc (colon - text + 1);
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strncpy (file_to_match, text, colon - text + 1);
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/* Remove trailing colons and quotes from the file name. */
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for (s = file_to_match + (colon - text);
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s > file_to_match;
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s--)
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if (*s == ':' || *s == quote_char)
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*s = '\0';
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}
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/* If the text includes a colon, they want completion only on a
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symbol name after the colon. Otherwise, we need to complete on
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symbols as well as on files. */
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if (colon)
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{
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list = make_file_symbol_completion_list (symbol_start, word,
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file_to_match);
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xfree (file_to_match);
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}
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else
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{
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list = make_symbol_completion_list (symbol_start, word);
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/* If text includes characters which cannot appear in a file
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name, they cannot be asking for completion on files. */
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if (strcspn (text,
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gdb_completer_file_name_break_characters) == text_len)
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fn_list = make_source_files_completion_list (text, text);
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}
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n_syms = VEC_length (char_ptr, list);
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n_files = VEC_length (char_ptr, fn_list);
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/* Catenate fn_list[] onto the end of list[]. */
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if (!n_syms)
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{
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VEC_free (char_ptr, list); /* Paranoia. */
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list = fn_list;
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fn_list = NULL;
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}
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else
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{
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char *fn;
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for (ix = 0; VEC_iterate (char_ptr, fn_list, ix, fn); ++ix)
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VEC_safe_push (char_ptr, list, fn);
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VEC_free (char_ptr, fn_list);
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}
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if (n_syms && n_files)
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{
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/* Nothing. */
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}
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else if (n_files)
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{
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char *fn;
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/* If we only have file names as possible completion, we should
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bring them in sync with what rl_complete expects. The
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problem is that if the user types "break /foo/b TAB", and the
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possible completions are "/foo/bar" and "/foo/baz"
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rl_complete expects us to return "bar" and "baz", without the
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leading directories, as possible completions, because `word'
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starts at the "b". But we ignore the value of `word' when we
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call make_source_files_completion_list above (because that
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would not DTRT when the completion results in both symbols
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and file names), so make_source_files_completion_list returns
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the full "/foo/bar" and "/foo/baz" strings. This produces
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wrong results when, e.g., there's only one possible
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completion, because rl_complete will prepend "/foo/" to each
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candidate completion. The loop below removes that leading
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part. */
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for (ix = 0; VEC_iterate (char_ptr, list, ix, fn); ++ix)
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{
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memmove (fn, fn + (word - text),
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strlen (fn) + 1 - (word - text));
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}
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}
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else if (!n_syms)
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{
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/* No completions at all. As the final resort, try completing
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on the entire text as a symbol. */
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list = make_symbol_completion_list (orig_text, word);
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}
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return list;
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}
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/* Helper for expression_completer which recursively adds field and
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method names from TYPE, a struct or union type, to the array
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OUTPUT. */
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static void
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add_struct_fields (struct type *type, VEC (char_ptr) **output,
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char *fieldname, int namelen)
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{
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int i;
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int computed_type_name = 0;
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const char *type_name = NULL;
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CHECK_TYPEDEF (type);
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for (i = 0; i < TYPE_NFIELDS (type); ++i)
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{
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if (i < TYPE_N_BASECLASSES (type))
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add_struct_fields (TYPE_BASECLASS (type, i),
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output, fieldname, namelen);
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else if (TYPE_FIELD_NAME (type, i))
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{
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if (TYPE_FIELD_NAME (type, i)[0] != '\0')
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{
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if (! strncmp (TYPE_FIELD_NAME (type, i),
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fieldname, namelen))
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VEC_safe_push (char_ptr, *output,
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xstrdup (TYPE_FIELD_NAME (type, i)));
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}
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else if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_UNION)
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{
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/* Recurse into anonymous unions. */
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add_struct_fields (TYPE_FIELD_TYPE (type, i),
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output, fieldname, namelen);
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}
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}
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}
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for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
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{
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const char *name = TYPE_FN_FIELDLIST_NAME (type, i);
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if (name && ! strncmp (name, fieldname, namelen))
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{
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if (!computed_type_name)
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{
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type_name = type_name_no_tag (type);
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computed_type_name = 1;
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}
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/* Omit constructors from the completion list. */
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if (!type_name || strcmp (type_name, name))
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VEC_safe_push (char_ptr, *output, xstrdup (name));
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}
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}
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}
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/* Complete on expressions. Often this means completing on symbol
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names, but some language parsers also have support for completing
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field names. */
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VEC (char_ptr) *
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expression_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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struct type *type = NULL;
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char *fieldname;
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const char *p;
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enum type_code code = TYPE_CODE_UNDEF;
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/* Perform a tentative parse of the expression, to see whether a
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field completion is required. */
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fieldname = NULL;
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TRY
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{
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type = parse_expression_for_completion (text, &fieldname, &code);
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}
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CATCH (except, RETURN_MASK_ERROR)
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{
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return NULL;
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}
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END_CATCH
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if (fieldname && type)
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{
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for (;;)
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{
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CHECK_TYPEDEF (type);
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if (TYPE_CODE (type) != TYPE_CODE_PTR
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&& TYPE_CODE (type) != TYPE_CODE_REF)
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break;
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type = TYPE_TARGET_TYPE (type);
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||
}
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if (TYPE_CODE (type) == TYPE_CODE_UNION
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|| TYPE_CODE (type) == TYPE_CODE_STRUCT)
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||
{
|
||
int flen = strlen (fieldname);
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||
VEC (char_ptr) *result = NULL;
|
||
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add_struct_fields (type, &result, fieldname, flen);
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xfree (fieldname);
|
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return result;
|
||
}
|
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}
|
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else if (fieldname && code != TYPE_CODE_UNDEF)
|
||
{
|
||
VEC (char_ptr) *result;
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||
struct cleanup *cleanup = make_cleanup (xfree, fieldname);
|
||
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result = make_symbol_completion_type (fieldname, fieldname, code);
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do_cleanups (cleanup);
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||
return result;
|
||
}
|
||
xfree (fieldname);
|
||
|
||
/* Commands which complete on locations want to see the entire
|
||
argument. */
|
||
for (p = word;
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p > text && p[-1] != ' ' && p[-1] != '\t';
|
||
p--)
|
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;
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|
||
/* Not ideal but it is what we used to do before... */
|
||
return location_completer (ignore, p, word);
|
||
}
|
||
|
||
/* See definition in completer.h. */
|
||
|
||
void
|
||
set_gdb_completion_word_break_characters (completer_ftype *fn)
|
||
{
|
||
/* So far we are only interested in differentiating filename
|
||
completers from everything else. */
|
||
if (fn == filename_completer)
|
||
rl_completer_word_break_characters
|
||
= gdb_completer_file_name_break_characters;
|
||
else
|
||
rl_completer_word_break_characters
|
||
= gdb_completer_command_word_break_characters;
|
||
}
|
||
|
||
/* Here are some useful test cases for completion. FIXME: These
|
||
should be put in the test suite. They should be tested with both
|
||
M-? and TAB.
|
||
|
||
"show output-" "radix"
|
||
"show output" "-radix"
|
||
"p" ambiguous (commands starting with p--path, print, printf, etc.)
|
||
"p " ambiguous (all symbols)
|
||
"info t foo" no completions
|
||
"info t " no completions
|
||
"info t" ambiguous ("info target", "info terminal", etc.)
|
||
"info ajksdlfk" no completions
|
||
"info ajksdlfk " no completions
|
||
"info" " "
|
||
"info " ambiguous (all info commands)
|
||
"p \"a" no completions (string constant)
|
||
"p 'a" ambiguous (all symbols starting with a)
|
||
"p b-a" ambiguous (all symbols starting with a)
|
||
"p b-" ambiguous (all symbols)
|
||
"file Make" "file" (word break hard to screw up here)
|
||
"file ../gdb.stabs/we" "ird" (needs to not break word at slash)
|
||
*/
|
||
|
||
typedef enum
|
||
{
|
||
handle_brkchars,
|
||
handle_completions,
|
||
handle_help
|
||
}
|
||
complete_line_internal_reason;
|
||
|
||
|
||
/* Internal function used to handle completions.
|
||
|
||
|
||
TEXT is the caller's idea of the "word" we are looking at.
|
||
|
||
LINE_BUFFER is available to be looked at; it contains the entire
|
||
text of the line. POINT is the offset in that line of the cursor.
|
||
You should pretend that the line ends at POINT.
|
||
|
||
REASON is of type complete_line_internal_reason.
|
||
|
||
If REASON is handle_brkchars:
|
||
Preliminary phase, called by gdb_completion_word_break_characters
|
||
function, is used to determine the correct set of chars that are
|
||
word delimiters depending on the current command in line_buffer.
|
||
No completion list should be generated; the return value should be
|
||
NULL. This is checked by an assertion in that function.
|
||
|
||
If REASON is handle_completions:
|
||
Main phase, called by complete_line function, is used to get the list
|
||
of posible completions.
|
||
|
||
If REASON is handle_help:
|
||
Special case when completing a 'help' command. In this case,
|
||
once sub-command completions are exhausted, we simply return NULL.
|
||
*/
|
||
|
||
static VEC (char_ptr) *
|
||
complete_line_internal (const char *text,
|
||
const char *line_buffer, int point,
|
||
complete_line_internal_reason reason)
|
||
{
|
||
VEC (char_ptr) *list = NULL;
|
||
char *tmp_command;
|
||
const char *p;
|
||
int ignore_help_classes;
|
||
/* Pointer within tmp_command which corresponds to text. */
|
||
char *word;
|
||
struct cmd_list_element *c, *result_list;
|
||
|
||
/* Choose the default set of word break characters to break
|
||
completions. If we later find out that we are doing completions
|
||
on command strings (as opposed to strings supplied by the
|
||
individual command completer functions, which can be any string)
|
||
then we will switch to the special word break set for command
|
||
strings, which leaves out the '-' character used in some
|
||
commands. */
|
||
rl_completer_word_break_characters =
|
||
current_language->la_word_break_characters();
|
||
|
||
/* Decide whether to complete on a list of gdb commands or on
|
||
symbols. */
|
||
tmp_command = (char *) alloca (point + 1);
|
||
p = tmp_command;
|
||
|
||
/* The help command should complete help aliases. */
|
||
ignore_help_classes = reason != handle_help;
|
||
|
||
strncpy (tmp_command, line_buffer, point);
|
||
tmp_command[point] = '\0';
|
||
/* Since text always contains some number of characters leading up
|
||
to point, we can find the equivalent position in tmp_command
|
||
by subtracting that many characters from the end of tmp_command. */
|
||
word = tmp_command + point - strlen (text);
|
||
|
||
if (point == 0)
|
||
{
|
||
/* An empty line we want to consider ambiguous; that is, it
|
||
could be any command. */
|
||
c = CMD_LIST_AMBIGUOUS;
|
||
result_list = 0;
|
||
}
|
||
else
|
||
{
|
||
c = lookup_cmd_1 (&p, cmdlist, &result_list, ignore_help_classes);
|
||
}
|
||
|
||
/* Move p up to the next interesting thing. */
|
||
while (*p == ' ' || *p == '\t')
|
||
{
|
||
p++;
|
||
}
|
||
|
||
if (!c)
|
||
{
|
||
/* It is an unrecognized command. So there are no
|
||
possible completions. */
|
||
list = NULL;
|
||
}
|
||
else if (c == CMD_LIST_AMBIGUOUS)
|
||
{
|
||
const char *q;
|
||
|
||
/* lookup_cmd_1 advances p up to the first ambiguous thing, but
|
||
doesn't advance over that thing itself. Do so now. */
|
||
q = p;
|
||
while (*q && (isalnum (*q) || *q == '-' || *q == '_'))
|
||
++q;
|
||
if (q != tmp_command + point)
|
||
{
|
||
/* There is something beyond the ambiguous
|
||
command, so there are no possible completions. For
|
||
example, "info t " or "info t foo" does not complete
|
||
to anything, because "info t" can be "info target" or
|
||
"info terminal". */
|
||
list = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* We're trying to complete on the command which was ambiguous.
|
||
This we can deal with. */
|
||
if (result_list)
|
||
{
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_cmdlist (*result_list->prefixlist, p,
|
||
word, ignore_help_classes);
|
||
}
|
||
else
|
||
{
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_cmdlist (cmdlist, p, word,
|
||
ignore_help_classes);
|
||
}
|
||
/* Ensure that readline does the right thing with respect to
|
||
inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We've recognized a full command. */
|
||
|
||
if (p == tmp_command + point)
|
||
{
|
||
/* There is no non-whitespace in the line beyond the
|
||
command. */
|
||
|
||
if (p[-1] == ' ' || p[-1] == '\t')
|
||
{
|
||
/* The command is followed by whitespace; we need to
|
||
complete on whatever comes after command. */
|
||
if (c->prefixlist)
|
||
{
|
||
/* It is a prefix command; what comes after it is
|
||
a subcommand (e.g. "info "). */
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_cmdlist (*c->prefixlist, p, word,
|
||
ignore_help_classes);
|
||
|
||
/* Ensure that readline does the right thing
|
||
with respect to inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
else if (reason == handle_help)
|
||
list = NULL;
|
||
else if (c->enums)
|
||
{
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_enum (c->enums, p, word);
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
else
|
||
{
|
||
/* It is a normal command; what comes after it is
|
||
completed by the command's completer function. */
|
||
if (c->completer == filename_completer)
|
||
{
|
||
/* Many commands which want to complete on
|
||
file names accept several file names, as
|
||
in "run foo bar >>baz". So we don't want
|
||
to complete the entire text after the
|
||
command, just the last word. To this
|
||
end, we need to find the beginning of the
|
||
file name by starting at `word' and going
|
||
backwards. */
|
||
for (p = word;
|
||
p > tmp_command
|
||
&& strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL;
|
||
p--)
|
||
;
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_file_name_break_characters;
|
||
}
|
||
else if (c->completer == location_completer)
|
||
{
|
||
/* Commands which complete on locations want to
|
||
see the entire argument. */
|
||
for (p = word;
|
||
p > tmp_command
|
||
&& p[-1] != ' ' && p[-1] != '\t';
|
||
p--)
|
||
;
|
||
}
|
||
if (reason == handle_brkchars
|
||
&& c->completer_handle_brkchars != NULL)
|
||
(*c->completer_handle_brkchars) (c, p, word);
|
||
if (reason != handle_brkchars && c->completer != NULL)
|
||
list = (*c->completer) (c, p, word);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* The command is not followed by whitespace; we need to
|
||
complete on the command itself, e.g. "p" which is a
|
||
command itself but also can complete to "print", "ptype"
|
||
etc. */
|
||
const char *q;
|
||
|
||
/* Find the command we are completing on. */
|
||
q = p;
|
||
while (q > tmp_command)
|
||
{
|
||
if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_')
|
||
--q;
|
||
else
|
||
break;
|
||
}
|
||
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_cmdlist (result_list, q, word,
|
||
ignore_help_classes);
|
||
|
||
/* Ensure that readline does the right thing
|
||
with respect to inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
}
|
||
else if (reason == handle_help)
|
||
list = NULL;
|
||
else
|
||
{
|
||
/* There is non-whitespace beyond the command. */
|
||
|
||
if (c->prefixlist && !c->allow_unknown)
|
||
{
|
||
/* It is an unrecognized subcommand of a prefix command,
|
||
e.g. "info adsfkdj". */
|
||
list = NULL;
|
||
}
|
||
else if (c->enums)
|
||
{
|
||
if (reason != handle_brkchars)
|
||
list = complete_on_enum (c->enums, p, word);
|
||
}
|
||
else
|
||
{
|
||
/* It is a normal command. */
|
||
if (c->completer == filename_completer)
|
||
{
|
||
/* See the commentary above about the specifics
|
||
of file-name completion. */
|
||
for (p = word;
|
||
p > tmp_command
|
||
&& strchr (gdb_completer_file_name_break_characters,
|
||
p[-1]) == NULL;
|
||
p--)
|
||
;
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_file_name_break_characters;
|
||
}
|
||
else if (c->completer == location_completer)
|
||
{
|
||
for (p = word;
|
||
p > tmp_command
|
||
&& p[-1] != ' ' && p[-1] != '\t';
|
||
p--)
|
||
;
|
||
}
|
||
if (reason == handle_brkchars
|
||
&& c->completer_handle_brkchars != NULL)
|
||
(*c->completer_handle_brkchars) (c, p, word);
|
||
if (reason != handle_brkchars && c->completer != NULL)
|
||
list = (*c->completer) (c, p, word);
|
||
}
|
||
}
|
||
}
|
||
|
||
return list;
|
||
}
|
||
|
||
/* See completer.h. */
|
||
|
||
int max_completions = 200;
|
||
|
||
/* See completer.h. */
|
||
|
||
completion_tracker_t
|
||
new_completion_tracker (void)
|
||
{
|
||
if (max_completions <= 0)
|
||
return NULL;
|
||
|
||
return htab_create_alloc (max_completions,
|
||
htab_hash_string, (htab_eq) streq,
|
||
NULL, xcalloc, xfree);
|
||
}
|
||
|
||
/* Cleanup routine to free a completion tracker and reset the pointer
|
||
to NULL. */
|
||
|
||
static void
|
||
free_completion_tracker (void *p)
|
||
{
|
||
completion_tracker_t *tracker_ptr = p;
|
||
|
||
htab_delete (*tracker_ptr);
|
||
*tracker_ptr = NULL;
|
||
}
|
||
|
||
/* See completer.h. */
|
||
|
||
struct cleanup *
|
||
make_cleanup_free_completion_tracker (completion_tracker_t *tracker_ptr)
|
||
{
|
||
if (*tracker_ptr == NULL)
|
||
return make_cleanup (null_cleanup, NULL);
|
||
|
||
return make_cleanup (free_completion_tracker, tracker_ptr);
|
||
}
|
||
|
||
/* See completer.h. */
|
||
|
||
enum maybe_add_completion_enum
|
||
maybe_add_completion (completion_tracker_t tracker, char *name)
|
||
{
|
||
void **slot;
|
||
|
||
if (max_completions < 0)
|
||
return MAYBE_ADD_COMPLETION_OK;
|
||
if (max_completions == 0)
|
||
return MAYBE_ADD_COMPLETION_MAX_REACHED;
|
||
|
||
gdb_assert (tracker != NULL);
|
||
|
||
if (htab_elements (tracker) >= max_completions)
|
||
return MAYBE_ADD_COMPLETION_MAX_REACHED;
|
||
|
||
slot = htab_find_slot (tracker, name, INSERT);
|
||
|
||
if (*slot != HTAB_EMPTY_ENTRY)
|
||
return MAYBE_ADD_COMPLETION_DUPLICATE;
|
||
|
||
*slot = name;
|
||
|
||
return (htab_elements (tracker) < max_completions
|
||
? MAYBE_ADD_COMPLETION_OK
|
||
: MAYBE_ADD_COMPLETION_OK_MAX_REACHED);
|
||
}
|
||
|
||
void
|
||
throw_max_completions_reached_error (void)
|
||
{
|
||
throw_error (MAX_COMPLETIONS_REACHED_ERROR, _("Max completions reached."));
|
||
}
|
||
|
||
/* Generate completions all at once. Returns a vector of unique strings
|
||
allocated with xmalloc. Returns NULL if there are no completions
|
||
or if max_completions is 0. If max_completions is non-negative, this will
|
||
return at most max_completions strings.
|
||
|
||
TEXT is the caller's idea of the "word" we are looking at.
|
||
|
||
LINE_BUFFER is available to be looked at; it contains the entire
|
||
text of the line.
|
||
|
||
POINT is the offset in that line of the cursor. You
|
||
should pretend that the line ends at POINT. */
|
||
|
||
VEC (char_ptr) *
|
||
complete_line (const char *text, const char *line_buffer, int point)
|
||
{
|
||
VEC (char_ptr) *list;
|
||
VEC (char_ptr) *result = NULL;
|
||
struct cleanup *cleanups;
|
||
completion_tracker_t tracker;
|
||
char *candidate;
|
||
int ix, max_reached;
|
||
|
||
if (max_completions == 0)
|
||
return NULL;
|
||
list = complete_line_internal (text, line_buffer, point,
|
||
handle_completions);
|
||
if (max_completions < 0)
|
||
return list;
|
||
|
||
tracker = new_completion_tracker ();
|
||
cleanups = make_cleanup_free_completion_tracker (&tracker);
|
||
make_cleanup_free_char_ptr_vec (list);
|
||
|
||
/* Do a final test for too many completions. Individual completers may
|
||
do some of this, but are not required to. Duplicates are also removed
|
||
here. Otherwise the user is left scratching his/her head: readline and
|
||
complete_command will remove duplicates, and if removal of duplicates
|
||
there brings the total under max_completions the user may think gdb quit
|
||
searching too early. */
|
||
|
||
for (ix = 0, max_reached = 0;
|
||
!max_reached && VEC_iterate (char_ptr, list, ix, candidate);
|
||
++ix)
|
||
{
|
||
enum maybe_add_completion_enum add_status;
|
||
|
||
add_status = maybe_add_completion (tracker, candidate);
|
||
|
||
switch (add_status)
|
||
{
|
||
case MAYBE_ADD_COMPLETION_OK:
|
||
VEC_safe_push (char_ptr, result, xstrdup (candidate));
|
||
break;
|
||
case MAYBE_ADD_COMPLETION_OK_MAX_REACHED:
|
||
VEC_safe_push (char_ptr, result, xstrdup (candidate));
|
||
max_reached = 1;
|
||
break;
|
||
case MAYBE_ADD_COMPLETION_MAX_REACHED:
|
||
gdb_assert_not_reached ("more than max completions reached");
|
||
case MAYBE_ADD_COMPLETION_DUPLICATE:
|
||
break;
|
||
}
|
||
}
|
||
|
||
do_cleanups (cleanups);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Complete on command names. Used by "help". */
|
||
VEC (char_ptr) *
|
||
command_completer (struct cmd_list_element *ignore,
|
||
const char *text, const char *word)
|
||
{
|
||
return complete_line_internal (word, text,
|
||
strlen (text), handle_help);
|
||
}
|
||
|
||
/* Complete on signals. */
|
||
|
||
VEC (char_ptr) *
|
||
signal_completer (struct cmd_list_element *ignore,
|
||
const char *text, const char *word)
|
||
{
|
||
VEC (char_ptr) *return_val = NULL;
|
||
size_t len = strlen (word);
|
||
int signum;
|
||
const char *signame;
|
||
|
||
for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum)
|
||
{
|
||
/* Can't handle this, so skip it. */
|
||
if (signum == GDB_SIGNAL_0)
|
||
continue;
|
||
|
||
signame = gdb_signal_to_name ((enum gdb_signal) signum);
|
||
|
||
/* Ignore the unknown signal case. */
|
||
if (!signame || strcmp (signame, "?") == 0)
|
||
continue;
|
||
|
||
if (strncasecmp (signame, word, len) == 0)
|
||
VEC_safe_push (char_ptr, return_val, xstrdup (signame));
|
||
}
|
||
|
||
return return_val;
|
||
}
|
||
|
||
/* Complete on a register or reggroup. */
|
||
|
||
VEC (char_ptr) *
|
||
reg_or_group_completer (struct cmd_list_element *ignore,
|
||
const char *text, const char *word)
|
||
{
|
||
VEC (char_ptr) *result = NULL;
|
||
size_t len = strlen (word);
|
||
struct gdbarch *gdbarch;
|
||
struct reggroup *group;
|
||
const char *name;
|
||
int i;
|
||
|
||
if (!target_has_registers)
|
||
return result;
|
||
|
||
gdbarch = get_frame_arch (get_selected_frame (NULL));
|
||
|
||
for (i = 0;
|
||
(name = user_reg_map_regnum_to_name (gdbarch, i)) != NULL;
|
||
i++)
|
||
{
|
||
if (*name != '\0' && strncmp (word, name, len) == 0)
|
||
VEC_safe_push (char_ptr, result, xstrdup (name));
|
||
}
|
||
|
||
for (group = reggroup_next (gdbarch, NULL);
|
||
group != NULL;
|
||
group = reggroup_next (gdbarch, group))
|
||
{
|
||
name = reggroup_name (group);
|
||
if (strncmp (word, name, len) == 0)
|
||
VEC_safe_push (char_ptr, result, xstrdup (name));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Get the list of chars that are considered as word breaks
|
||
for the current command. */
|
||
|
||
char *
|
||
gdb_completion_word_break_characters (void)
|
||
{
|
||
VEC (char_ptr) *list;
|
||
|
||
list = complete_line_internal (rl_line_buffer, rl_line_buffer, rl_point,
|
||
handle_brkchars);
|
||
gdb_assert (list == NULL);
|
||
return rl_completer_word_break_characters;
|
||
}
|
||
|
||
/* Generate completions one by one for the completer. Each time we
|
||
are called return another potential completion to the caller.
|
||
line_completion just completes on commands or passes the buck to
|
||
the command's completer function, the stuff specific to symbol
|
||
completion is in make_symbol_completion_list.
|
||
|
||
TEXT is the caller's idea of the "word" we are looking at.
|
||
|
||
MATCHES is the number of matches that have currently been collected
|
||
from calling this completion function. When zero, then we need to
|
||
initialize, otherwise the initialization has already taken place
|
||
and we can just return the next potential completion string.
|
||
|
||
LINE_BUFFER is available to be looked at; it contains the entire
|
||
text of the line. POINT is the offset in that line of the cursor.
|
||
You should pretend that the line ends at POINT.
|
||
|
||
Returns NULL if there are no more completions, else a pointer to a
|
||
string which is a possible completion, it is the caller's
|
||
responsibility to free the string. */
|
||
|
||
static char *
|
||
line_completion_function (const char *text, int matches,
|
||
char *line_buffer, int point)
|
||
{
|
||
static VEC (char_ptr) *list = NULL; /* Cache of completions. */
|
||
static int index; /* Next cached completion. */
|
||
char *output = NULL;
|
||
|
||
if (matches == 0)
|
||
{
|
||
/* The caller is beginning to accumulate a new set of
|
||
completions, so we need to find all of them now, and cache
|
||
them for returning one at a time on future calls. */
|
||
|
||
if (list)
|
||
{
|
||
/* Free the storage used by LIST, but not by the strings
|
||
inside. This is because rl_complete_internal () frees
|
||
the strings. As complete_line may abort by calling
|
||
`error' clear LIST now. */
|
||
VEC_free (char_ptr, list);
|
||
}
|
||
index = 0;
|
||
list = complete_line (text, line_buffer, point);
|
||
}
|
||
|
||
/* If we found a list of potential completions during initialization
|
||
then dole them out one at a time. After returning the last one,
|
||
return NULL (and continue to do so) each time we are called after
|
||
that, until a new list is available. */
|
||
|
||
if (list)
|
||
{
|
||
if (index < VEC_length (char_ptr, list))
|
||
{
|
||
output = VEC_index (char_ptr, list, index);
|
||
index++;
|
||
}
|
||
}
|
||
|
||
#if 0
|
||
/* Can't do this because readline hasn't yet checked the word breaks
|
||
for figuring out whether to insert a quote. */
|
||
if (output == NULL)
|
||
/* Make sure the word break characters are set back to normal for
|
||
the next time that readline tries to complete something. */
|
||
rl_completer_word_break_characters =
|
||
current_language->la_word_break_characters();
|
||
#endif
|
||
|
||
return (output);
|
||
}
|
||
|
||
/* Skip over the possibly quoted word STR (as defined by the quote
|
||
characters QUOTECHARS and the word break characters BREAKCHARS).
|
||
Returns pointer to the location after the "word". If either
|
||
QUOTECHARS or BREAKCHARS is NULL, use the same values used by the
|
||
completer. */
|
||
|
||
const char *
|
||
skip_quoted_chars (const char *str, const char *quotechars,
|
||
const char *breakchars)
|
||
{
|
||
char quote_char = '\0';
|
||
const char *scan;
|
||
|
||
if (quotechars == NULL)
|
||
quotechars = gdb_completer_quote_characters;
|
||
|
||
if (breakchars == NULL)
|
||
breakchars = current_language->la_word_break_characters();
|
||
|
||
for (scan = str; *scan != '\0'; scan++)
|
||
{
|
||
if (quote_char != '\0')
|
||
{
|
||
/* Ignore everything until the matching close quote char. */
|
||
if (*scan == quote_char)
|
||
{
|
||
/* Found matching close quote. */
|
||
scan++;
|
||
break;
|
||
}
|
||
}
|
||
else if (strchr (quotechars, *scan))
|
||
{
|
||
/* Found start of a quoted string. */
|
||
quote_char = *scan;
|
||
}
|
||
else if (strchr (breakchars, *scan))
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
|
||
return (scan);
|
||
}
|
||
|
||
/* Skip over the possibly quoted word STR (as defined by the quote
|
||
characters and word break characters used by the completer).
|
||
Returns pointer to the location after the "word". */
|
||
|
||
const char *
|
||
skip_quoted (const char *str)
|
||
{
|
||
return skip_quoted_chars (str, NULL, NULL);
|
||
}
|
||
|
||
/* Return a message indicating that the maximum number of completions
|
||
has been reached and that there may be more. */
|
||
|
||
const char *
|
||
get_max_completions_reached_message (void)
|
||
{
|
||
return _("*** List may be truncated, max-completions reached. ***");
|
||
}
|
||
|
||
/* GDB replacement for rl_display_match_list.
|
||
Readline doesn't provide a clean interface for TUI(curses).
|
||
A hack previously used was to send readline's rl_outstream through a pipe
|
||
and read it from the event loop. Bleah. IWBN if readline abstracted
|
||
away all the necessary bits, and this is what this code does. It
|
||
replicates the parts of readline we need and then adds an abstraction
|
||
layer, currently implemented as struct match_list_displayer, so that both
|
||
CLI and TUI can use it. We copy all this readline code to minimize
|
||
GDB-specific mods to readline. Once this code performs as desired then
|
||
we can submit it to the readline maintainers.
|
||
|
||
N.B. A lot of the code is the way it is in order to minimize differences
|
||
from readline's copy. */
|
||
|
||
/* Not supported here. */
|
||
#undef VISIBLE_STATS
|
||
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
|
||
#define MB_NULLWCH(x) ((x) == 0)
|
||
#endif
|
||
|
||
#define ELLIPSIS_LEN 3
|
||
|
||
/* gdb version of readline/complete.c:get_y_or_n.
|
||
'y' -> returns 1, and 'n' -> returns 0.
|
||
Also supported: space == 'y', RUBOUT == 'n', ctrl-g == start over.
|
||
If FOR_PAGER is non-zero, then also supported are:
|
||
NEWLINE or RETURN -> returns 2, and 'q' -> returns 0. */
|
||
|
||
static int
|
||
gdb_get_y_or_n (int for_pager, const struct match_list_displayer *displayer)
|
||
{
|
||
int c;
|
||
|
||
for (;;)
|
||
{
|
||
RL_SETSTATE (RL_STATE_MOREINPUT);
|
||
c = displayer->read_key (displayer);
|
||
RL_UNSETSTATE (RL_STATE_MOREINPUT);
|
||
|
||
if (c == 'y' || c == 'Y' || c == ' ')
|
||
return 1;
|
||
if (c == 'n' || c == 'N' || c == RUBOUT)
|
||
return 0;
|
||
if (c == ABORT_CHAR || c < 0)
|
||
{
|
||
/* Readline doesn't erase_entire_line here, but without it the
|
||
--More-- prompt isn't erased and neither is the text entered
|
||
thus far redisplayed. */
|
||
displayer->erase_entire_line (displayer);
|
||
/* Note: The arguments to rl_abort are ignored. */
|
||
rl_abort (0, 0);
|
||
}
|
||
if (for_pager && (c == NEWLINE || c == RETURN))
|
||
return 2;
|
||
if (for_pager && (c == 'q' || c == 'Q'))
|
||
return 0;
|
||
displayer->beep (displayer);
|
||
}
|
||
}
|
||
|
||
/* Pager function for tab-completion.
|
||
This is based on readline/complete.c:_rl_internal_pager.
|
||
LINES is the number of lines of output displayed thus far.
|
||
Returns:
|
||
-1 -> user pressed 'n' or equivalent,
|
||
0 -> user pressed 'y' or equivalent,
|
||
N -> user pressed NEWLINE or equivalent and N is LINES - 1. */
|
||
|
||
static int
|
||
gdb_display_match_list_pager (int lines,
|
||
const struct match_list_displayer *displayer)
|
||
{
|
||
int i;
|
||
|
||
displayer->puts (displayer, "--More--");
|
||
displayer->flush (displayer);
|
||
i = gdb_get_y_or_n (1, displayer);
|
||
displayer->erase_entire_line (displayer);
|
||
if (i == 0)
|
||
return -1;
|
||
else if (i == 2)
|
||
return (lines - 1);
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
/* Return non-zero if FILENAME is a directory.
|
||
Based on readline/complete.c:path_isdir. */
|
||
|
||
static int
|
||
gdb_path_isdir (const char *filename)
|
||
{
|
||
struct stat finfo;
|
||
|
||
return (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode));
|
||
}
|
||
|
||
/* Return the portion of PATHNAME that should be output when listing
|
||
possible completions. If we are hacking filename completion, we
|
||
are only interested in the basename, the portion following the
|
||
final slash. Otherwise, we return what we were passed. Since
|
||
printing empty strings is not very informative, if we're doing
|
||
filename completion, and the basename is the empty string, we look
|
||
for the previous slash and return the portion following that. If
|
||
there's no previous slash, we just return what we were passed.
|
||
|
||
Based on readline/complete.c:printable_part. */
|
||
|
||
static char *
|
||
gdb_printable_part (char *pathname)
|
||
{
|
||
char *temp, *x;
|
||
|
||
if (rl_filename_completion_desired == 0) /* don't need to do anything */
|
||
return (pathname);
|
||
|
||
temp = strrchr (pathname, '/');
|
||
#if defined (__MSDOS__)
|
||
if (temp == 0 && ISALPHA ((unsigned char)pathname[0]) && pathname[1] == ':')
|
||
temp = pathname + 1;
|
||
#endif
|
||
|
||
if (temp == 0 || *temp == '\0')
|
||
return (pathname);
|
||
/* If the basename is NULL, we might have a pathname like '/usr/src/'.
|
||
Look for a previous slash and, if one is found, return the portion
|
||
following that slash. If there's no previous slash, just return the
|
||
pathname we were passed. */
|
||
else if (temp[1] == '\0')
|
||
{
|
||
for (x = temp - 1; x > pathname; x--)
|
||
if (*x == '/')
|
||
break;
|
||
return ((*x == '/') ? x + 1 : pathname);
|
||
}
|
||
else
|
||
return ++temp;
|
||
}
|
||
|
||
/* Compute width of STRING when displayed on screen by print_filename.
|
||
Based on readline/complete.c:fnwidth. */
|
||
|
||
static int
|
||
gdb_fnwidth (const char *string)
|
||
{
|
||
int width, pos;
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
mbstate_t ps;
|
||
int left, w;
|
||
size_t clen;
|
||
wchar_t wc;
|
||
|
||
left = strlen (string) + 1;
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
#endif
|
||
|
||
width = pos = 0;
|
||
while (string[pos])
|
||
{
|
||
if (CTRL_CHAR (string[pos]) || string[pos] == RUBOUT)
|
||
{
|
||
width += 2;
|
||
pos++;
|
||
}
|
||
else
|
||
{
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
clen = mbrtowc (&wc, string + pos, left - pos, &ps);
|
||
if (MB_INVALIDCH (clen))
|
||
{
|
||
width++;
|
||
pos++;
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
}
|
||
else if (MB_NULLWCH (clen))
|
||
break;
|
||
else
|
||
{
|
||
pos += clen;
|
||
w = wcwidth (wc);
|
||
width += (w >= 0) ? w : 1;
|
||
}
|
||
#else
|
||
width++;
|
||
pos++;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
return width;
|
||
}
|
||
|
||
/* Print TO_PRINT, one matching completion.
|
||
PREFIX_BYTES is number of common prefix bytes.
|
||
Based on readline/complete.c:fnprint. */
|
||
|
||
static int
|
||
gdb_fnprint (const char *to_print, int prefix_bytes,
|
||
const struct match_list_displayer *displayer)
|
||
{
|
||
int printed_len, w;
|
||
const char *s;
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
mbstate_t ps;
|
||
const char *end;
|
||
size_t tlen;
|
||
int width;
|
||
wchar_t wc;
|
||
|
||
end = to_print + strlen (to_print) + 1;
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
#endif
|
||
|
||
printed_len = 0;
|
||
|
||
/* Don't print only the ellipsis if the common prefix is one of the
|
||
possible completions */
|
||
if (to_print[prefix_bytes] == '\0')
|
||
prefix_bytes = 0;
|
||
|
||
if (prefix_bytes)
|
||
{
|
||
char ellipsis;
|
||
|
||
ellipsis = (to_print[prefix_bytes] == '.') ? '_' : '.';
|
||
for (w = 0; w < ELLIPSIS_LEN; w++)
|
||
displayer->putch (displayer, ellipsis);
|
||
printed_len = ELLIPSIS_LEN;
|
||
}
|
||
|
||
s = to_print + prefix_bytes;
|
||
while (*s)
|
||
{
|
||
if (CTRL_CHAR (*s))
|
||
{
|
||
displayer->putch (displayer, '^');
|
||
displayer->putch (displayer, UNCTRL (*s));
|
||
printed_len += 2;
|
||
s++;
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
#endif
|
||
}
|
||
else if (*s == RUBOUT)
|
||
{
|
||
displayer->putch (displayer, '^');
|
||
displayer->putch (displayer, '?');
|
||
printed_len += 2;
|
||
s++;
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
#if defined (HANDLE_MULTIBYTE)
|
||
tlen = mbrtowc (&wc, s, end - s, &ps);
|
||
if (MB_INVALIDCH (tlen))
|
||
{
|
||
tlen = 1;
|
||
width = 1;
|
||
memset (&ps, 0, sizeof (mbstate_t));
|
||
}
|
||
else if (MB_NULLWCH (tlen))
|
||
break;
|
||
else
|
||
{
|
||
w = wcwidth (wc);
|
||
width = (w >= 0) ? w : 1;
|
||
}
|
||
for (w = 0; w < tlen; ++w)
|
||
displayer->putch (displayer, s[w]);
|
||
s += tlen;
|
||
printed_len += width;
|
||
#else
|
||
displayer->putch (displayer, *s);
|
||
s++;
|
||
printed_len++;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
return printed_len;
|
||
}
|
||
|
||
/* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we
|
||
are using it, check for and output a single character for `special'
|
||
filenames. Return the number of characters we output.
|
||
Based on readline/complete.c:print_filename. */
|
||
|
||
static int
|
||
gdb_print_filename (char *to_print, char *full_pathname, int prefix_bytes,
|
||
const struct match_list_displayer *displayer)
|
||
{
|
||
int printed_len, extension_char, slen, tlen;
|
||
char *s, c, *new_full_pathname, *dn;
|
||
extern int _rl_complete_mark_directories;
|
||
|
||
extension_char = 0;
|
||
printed_len = gdb_fnprint (to_print, prefix_bytes, displayer);
|
||
|
||
#if defined (VISIBLE_STATS)
|
||
if (rl_filename_completion_desired && (rl_visible_stats || _rl_complete_mark_directories))
|
||
#else
|
||
if (rl_filename_completion_desired && _rl_complete_mark_directories)
|
||
#endif
|
||
{
|
||
/* If to_print != full_pathname, to_print is the basename of the
|
||
path passed. In this case, we try to expand the directory
|
||
name before checking for the stat character. */
|
||
if (to_print != full_pathname)
|
||
{
|
||
/* Terminate the directory name. */
|
||
c = to_print[-1];
|
||
to_print[-1] = '\0';
|
||
|
||
/* If setting the last slash in full_pathname to a NUL results in
|
||
full_pathname being the empty string, we are trying to complete
|
||
files in the root directory. If we pass a null string to the
|
||
bash directory completion hook, for example, it will expand it
|
||
to the current directory. We just want the `/'. */
|
||
if (full_pathname == 0 || *full_pathname == 0)
|
||
dn = "/";
|
||
else if (full_pathname[0] != '/')
|
||
dn = full_pathname;
|
||
else if (full_pathname[1] == 0)
|
||
dn = "//"; /* restore trailing slash to `//' */
|
||
else if (full_pathname[1] == '/' && full_pathname[2] == 0)
|
||
dn = "/"; /* don't turn /// into // */
|
||
else
|
||
dn = full_pathname;
|
||
s = tilde_expand (dn);
|
||
if (rl_directory_completion_hook)
|
||
(*rl_directory_completion_hook) (&s);
|
||
|
||
slen = strlen (s);
|
||
tlen = strlen (to_print);
|
||
new_full_pathname = (char *)xmalloc (slen + tlen + 2);
|
||
strcpy (new_full_pathname, s);
|
||
if (s[slen - 1] == '/')
|
||
slen--;
|
||
else
|
||
new_full_pathname[slen] = '/';
|
||
new_full_pathname[slen] = '/';
|
||
strcpy (new_full_pathname + slen + 1, to_print);
|
||
|
||
#if defined (VISIBLE_STATS)
|
||
if (rl_visible_stats)
|
||
extension_char = stat_char (new_full_pathname);
|
||
else
|
||
#endif
|
||
if (gdb_path_isdir (new_full_pathname))
|
||
extension_char = '/';
|
||
|
||
xfree (new_full_pathname);
|
||
to_print[-1] = c;
|
||
}
|
||
else
|
||
{
|
||
s = tilde_expand (full_pathname);
|
||
#if defined (VISIBLE_STATS)
|
||
if (rl_visible_stats)
|
||
extension_char = stat_char (s);
|
||
else
|
||
#endif
|
||
if (gdb_path_isdir (s))
|
||
extension_char = '/';
|
||
}
|
||
|
||
xfree (s);
|
||
if (extension_char)
|
||
{
|
||
displayer->putch (displayer, extension_char);
|
||
printed_len++;
|
||
}
|
||
}
|
||
|
||
return printed_len;
|
||
}
|
||
|
||
/* GDB version of readline/complete.c:complete_get_screenwidth. */
|
||
|
||
static int
|
||
gdb_complete_get_screenwidth (const struct match_list_displayer *displayer)
|
||
{
|
||
/* Readline has other stuff here which it's not clear we need. */
|
||
return displayer->width;
|
||
}
|
||
|
||
extern int _rl_completion_prefix_display_length;
|
||
extern int _rl_print_completions_horizontally;
|
||
|
||
EXTERN_C int _rl_qsort_string_compare (const void *, const void *);
|
||
typedef int QSFUNC (const void *, const void *);
|
||
|
||
/* GDB version of readline/complete.c:rl_display_match_list.
|
||
See gdb_display_match_list for a description of MATCHES, LEN, MAX.
|
||
Returns non-zero if all matches are displayed. */
|
||
|
||
static int
|
||
gdb_display_match_list_1 (char **matches, int len, int max,
|
||
const struct match_list_displayer *displayer)
|
||
{
|
||
int count, limit, printed_len, lines, cols;
|
||
int i, j, k, l, common_length, sind;
|
||
char *temp, *t;
|
||
int page_completions = displayer->height != INT_MAX && pagination_enabled;
|
||
|
||
/* Find the length of the prefix common to all items: length as displayed
|
||
characters (common_length) and as a byte index into the matches (sind) */
|
||
common_length = sind = 0;
|
||
if (_rl_completion_prefix_display_length > 0)
|
||
{
|
||
t = gdb_printable_part (matches[0]);
|
||
temp = strrchr (t, '/');
|
||
common_length = temp ? gdb_fnwidth (temp) : gdb_fnwidth (t);
|
||
sind = temp ? strlen (temp) : strlen (t);
|
||
|
||
if (common_length > _rl_completion_prefix_display_length && common_length > ELLIPSIS_LEN)
|
||
max -= common_length - ELLIPSIS_LEN;
|
||
else
|
||
common_length = sind = 0;
|
||
}
|
||
|
||
/* How many items of MAX length can we fit in the screen window? */
|
||
cols = gdb_complete_get_screenwidth (displayer);
|
||
max += 2;
|
||
limit = cols / max;
|
||
if (limit != 1 && (limit * max == cols))
|
||
limit--;
|
||
|
||
/* If cols == 0, limit will end up -1 */
|
||
if (cols < displayer->width && limit < 0)
|
||
limit = 1;
|
||
|
||
/* Avoid a possible floating exception. If max > cols,
|
||
limit will be 0 and a divide-by-zero fault will result. */
|
||
if (limit == 0)
|
||
limit = 1;
|
||
|
||
/* How many iterations of the printing loop? */
|
||
count = (len + (limit - 1)) / limit;
|
||
|
||
/* Watch out for special case. If LEN is less than LIMIT, then
|
||
just do the inner printing loop.
|
||
0 < len <= limit implies count = 1. */
|
||
|
||
/* Sort the items if they are not already sorted. */
|
||
if (rl_ignore_completion_duplicates == 0 && rl_sort_completion_matches)
|
||
qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare);
|
||
|
||
displayer->crlf (displayer);
|
||
|
||
lines = 0;
|
||
if (_rl_print_completions_horizontally == 0)
|
||
{
|
||
/* Print the sorted items, up-and-down alphabetically, like ls. */
|
||
for (i = 1; i <= count; i++)
|
||
{
|
||
for (j = 0, l = i; j < limit; j++)
|
||
{
|
||
if (l > len || matches[l] == 0)
|
||
break;
|
||
else
|
||
{
|
||
temp = gdb_printable_part (matches[l]);
|
||
printed_len = gdb_print_filename (temp, matches[l], sind,
|
||
displayer);
|
||
|
||
if (j + 1 < limit)
|
||
for (k = 0; k < max - printed_len; k++)
|
||
displayer->putch (displayer, ' ');
|
||
}
|
||
l += count;
|
||
}
|
||
displayer->crlf (displayer);
|
||
lines++;
|
||
if (page_completions && lines >= (displayer->height - 1) && i < count)
|
||
{
|
||
lines = gdb_display_match_list_pager (lines, displayer);
|
||
if (lines < 0)
|
||
return 0;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Print the sorted items, across alphabetically, like ls -x. */
|
||
for (i = 1; matches[i]; i++)
|
||
{
|
||
temp = gdb_printable_part (matches[i]);
|
||
printed_len = gdb_print_filename (temp, matches[i], sind, displayer);
|
||
/* Have we reached the end of this line? */
|
||
if (matches[i+1])
|
||
{
|
||
if (i && (limit > 1) && (i % limit) == 0)
|
||
{
|
||
displayer->crlf (displayer);
|
||
lines++;
|
||
if (page_completions && lines >= displayer->height - 1)
|
||
{
|
||
lines = gdb_display_match_list_pager (lines, displayer);
|
||
if (lines < 0)
|
||
return 0;
|
||
}
|
||
}
|
||
else
|
||
for (k = 0; k < max - printed_len; k++)
|
||
displayer->putch (displayer, ' ');
|
||
}
|
||
}
|
||
displayer->crlf (displayer);
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Utility for displaying completion list matches, used by both CLI and TUI.
|
||
|
||
MATCHES is the list of strings, in argv format, LEN is the number of
|
||
strings in MATCHES, and MAX is the length of the longest string in
|
||
MATCHES. */
|
||
|
||
void
|
||
gdb_display_match_list (char **matches, int len, int max,
|
||
const struct match_list_displayer *displayer)
|
||
{
|
||
/* Readline will never call this if complete_line returned NULL. */
|
||
gdb_assert (max_completions != 0);
|
||
|
||
/* complete_line will never return more than this. */
|
||
if (max_completions > 0)
|
||
gdb_assert (len <= max_completions);
|
||
|
||
if (rl_completion_query_items > 0 && len >= rl_completion_query_items)
|
||
{
|
||
char msg[100];
|
||
|
||
/* We can't use *query here because they wait for <RET> which is
|
||
wrong here. This follows the readline version as closely as possible
|
||
for compatibility's sake. See readline/complete.c. */
|
||
|
||
displayer->crlf (displayer);
|
||
|
||
xsnprintf (msg, sizeof (msg),
|
||
"Display all %d possibilities? (y or n)", len);
|
||
displayer->puts (displayer, msg);
|
||
displayer->flush (displayer);
|
||
|
||
if (gdb_get_y_or_n (0, displayer) == 0)
|
||
{
|
||
displayer->crlf (displayer);
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (gdb_display_match_list_1 (matches, len, max, displayer))
|
||
{
|
||
/* Note: MAX_COMPLETIONS may be -1 or zero, but LEN is always > 0. */
|
||
if (len == max_completions)
|
||
{
|
||
/* The maximum number of completions has been reached. Warn the user
|
||
that there may be more. */
|
||
const char *message = get_max_completions_reached_message ();
|
||
|
||
displayer->puts (displayer, message);
|
||
displayer->crlf (displayer);
|
||
}
|
||
}
|
||
}
|
||
|
||
extern initialize_file_ftype _initialize_completer; /* -Wmissing-prototypes */
|
||
|
||
void
|
||
_initialize_completer (void)
|
||
{
|
||
add_setshow_zuinteger_unlimited_cmd ("max-completions", no_class,
|
||
&max_completions, _("\
|
||
Set maximum number of completion candidates."), _("\
|
||
Show maximum number of completion candidates."), _("\
|
||
Use this to limit the number of candidates considered\n\
|
||
during completion. Specifying \"unlimited\" or -1\n\
|
||
disables limiting. Note that setting either no limit or\n\
|
||
a very large limit can make completion slow."),
|
||
NULL, NULL, &setlist, &showlist);
|
||
}
|