X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fcompleter.c;h=add79cc140b3deb0623144f595ba86b5645f9cc7;hb=3b27ef472df3b4cdcdd54629281610d594c99c97;hp=57aced8f4e01792a091255cfbb343c27e2fdc5a8;hpb=b6ba6518e9254bc25f88088228e93ac966ebccd1;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/completer.c b/gdb/completer.c
index 57aced8f4e..add79cc140 100644
--- a/gdb/completer.c
+++ b/gdb/completer.c
@@ -1,11 +1,11 @@
/* Line completion stuff for GDB, the GNU debugger.
- Copyright 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 2000-2015 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -14,49 +14,59 @@
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. */
+ along with this program. If not, see . */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
+#include "filenames.h" /* For DOSish file names. */
+#include "language.h"
+#include "gdb_signals.h"
+#include "target.h"
+#include "reggroups.h"
+#include "user-regs.h"
-/* FIXME: This is needed because of lookup_cmd_1().
- We should be calling a hook instead so we eliminate the CLI dependency. */
+#include "cli/cli-decode.h"
+
+/* FIXME: This is needed because of lookup_cmd_1 (). We should be
+ calling a hook instead so we eliminate the CLI dependency. */
#include "gdbcmd.h"
-/* Needed for rl_completer_word_break_characters() */
-#include
+/* Needed for rl_completer_word_break_characters() and for
+ rl_filename_completion_function. */
+#include "readline/readline.h"
/* readline defines this. */
#undef savestring
#include "completer.h"
-/* Prototypes for local functions */
+/* Prototypes for local functions. */
+static
+char *line_completion_function (const char *text, int matches,
+ char *line_buffer,
+ int point);
/* readline uses the word breaks for two things:
(1) In figuring out where to point the TEXT parameter to the
rl_completion_entry_function. Since we don't use TEXT for much,
- it doesn't matter a lot what the word breaks are for this purpose, but
- it does affect how much stuff M-? lists.
+ it doesn't matter a lot what the word breaks are for this purpose,
+ but it does affect how much stuff M-? lists.
(2) If one of the matches contains a word break character, readline
will quote it. That's why we switch between
- gdb_completer_word_break_characters and
+ current_language->la_word_break_characters() and
gdb_completer_command_word_break_characters. I'm not sure when
- we need this behavior (perhaps for funky characters in C++ symbols?). */
+ we need this behavior (perhaps for funky characters in C++
+ symbols?). */
/* Variables which are necessary for fancy command line editing. */
-static char *gdb_completer_word_break_characters =
-" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
/* When completing on command names, we remove '-' from the list of
word break characters, since we use it in command names. If the
readline library sees one in any of the current completion strings,
- it thinks that the string needs to be quoted and automatically supplies
- a leading quote. */
+ it thinks that the string needs to be quoted and automatically
+ supplies a leading quote. */
static char *gdb_completer_command_word_break_characters =
" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
@@ -64,7 +74,7 @@ static char *gdb_completer_command_word_break_characters =
break characters any characters that are commonly used in file
names, such as '-', '+', '~', etc. Otherwise, readline displays
incorrect completion candidates. */
-#ifdef __MSDOS__
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
/* MS-DOS and MS-Windows use colon as part of the drive spec, and most
programs support @foo style response files. */
static char *gdb_completer_file_name_break_characters = " \t\n*|\"';?><@";
@@ -72,106 +82,393 @@ static char *gdb_completer_file_name_break_characters = " \t\n*|\"';?><@";
static char *gdb_completer_file_name_break_characters = " \t\n*|\"';:?><";
#endif
-/* Characters that can be used to quote completion strings. Note that we
- can't include '"' because the gdb C parser treats such quoted sequences
- as strings. */
+/* Characters that can be used to quote completion strings. Note that
+ we can't include '"' because the gdb C parser treats such quoted
+ sequences as strings. */
static char *gdb_completer_quote_characters = "'";
-/* Accessor for some completer data that may interest other files. */
+/* Accessor for some completer data that may interest other files. */
char *
-get_gdb_completer_word_break_characters (void)
+get_gdb_completer_quote_characters (void)
{
- return gdb_completer_word_break_characters;
+ return gdb_completer_quote_characters;
}
+/* Line completion interface function for readline. */
+
char *
-get_gdb_completer_quote_characters (void)
+readline_line_completion_function (const char *text, int matches)
{
- return gdb_completer_quote_characters;
+ return line_completion_function (text, matches,
+ rl_line_buffer, rl_point);
+}
+
+/* This can be used for functions which don't want to complete on
+ symbols but don't want to complete on anything else either. */
+VEC (char_ptr) *
+noop_completer (struct cmd_list_element *ignore,
+ const char *text, const char *prefix)
+{
+ return NULL;
}
/* Complete on filenames. */
-char **
-filename_completer (char *text, char *word)
+VEC (char_ptr) *
+filename_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
{
- /* From readline. */
-extern char *filename_completion_function (char *, int);
int subsequent_name;
- char **return_val;
- int return_val_used;
- int return_val_alloced;
-
- return_val_used = 0;
- /* Small for testing. */
- return_val_alloced = 1;
- return_val = (char **) xmalloc (return_val_alloced * sizeof (char *));
+ VEC (char_ptr) *return_val = NULL;
subsequent_name = 0;
while (1)
{
- char *p;
- p = filename_completion_function (text, subsequent_name);
- if (return_val_used >= return_val_alloced)
- {
- return_val_alloced *= 2;
- return_val =
- (char **) xrealloc (return_val,
- return_val_alloced * sizeof (char *));
- }
+ char *p, *q;
+
+ p = rl_filename_completion_function (text, subsequent_name);
if (p == NULL)
- {
- return_val[return_val_used++] = p;
- break;
- }
+ break;
/* We need to set subsequent_name to a non-zero value before the
- continue line below, because otherwise, if the first file seen
- by GDB is a backup file whose name ends in a `~', we will loop
- indefinitely. */
+ continue line below, because otherwise, if the first file
+ seen by GDB is a backup file whose name ends in a `~', we
+ will loop indefinitely. */
subsequent_name = 1;
- /* Like emacs, don't complete on old versions. Especially useful
- in the "source" command. */
+ /* Like emacs, don't complete on old versions. Especially
+ useful in the "source" command. */
if (p[strlen (p) - 1] == '~')
- continue;
+ {
+ xfree (p);
+ continue;
+ }
- {
- char *q;
- if (word == text)
- /* Return exactly p. */
- return_val[return_val_used++] = p;
- else if (word > text)
- {
- /* Return some portion of p. */
- q = xmalloc (strlen (p) + 5);
- strcpy (q, p + (word - text));
- return_val[return_val_used++] = q;
- xfree (p);
- }
- else
- {
- /* Return some of TEXT plus p. */
- q = xmalloc (strlen (p) + (text - word) + 5);
- strncpy (q, word, text - word);
- q[text - word] = '\0';
- strcat (q, p);
- return_val[return_val_used++] = q;
- xfree (p);
- }
- }
+ if (word == text)
+ /* Return exactly p. */
+ q = p;
+ else if (word > text)
+ {
+ /* Return some portion of p. */
+ q = xmalloc (strlen (p) + 5);
+ strcpy (q, p + (word - text));
+ xfree (p);
+ }
+ else
+ {
+ /* Return some of TEXT plus p. */
+ q = xmalloc (strlen (p) + (text - word) + 5);
+ strncpy (q, word, text - word);
+ q[text - word] = '\0';
+ strcat (q, p);
+ xfree (p);
+ }
+ VEC_safe_push (char_ptr, return_val, q);
}
#if 0
- /* There is no way to do this just long enough to affect quote inserting
- without also affecting the next completion. This should be fixed in
- readline. FIXME. */
- /* Insure that readline does the right thing
+ /* There is no way to do this just long enough to affect quote
+ inserting without also affecting the next completion. This
+ should be fixed in readline. FIXME. */
+ /* Ensure that readline does the right thing
with respect to inserting quotes. */
rl_completer_word_break_characters = "";
#endif
return return_val;
}
-/* 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.
+/* Complete on locations, which might be of two possible forms:
+
+ file:line
+ or
+ symbol+offset
+
+ This is intended to be used in commands that set breakpoints
+ etc. */
+
+VEC (char_ptr) *
+location_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
+{
+ int n_syms, n_files, ix;
+ VEC (char_ptr) *fn_list = NULL;
+ VEC (char_ptr) *list = NULL;
+ const char *p;
+ int quote_found = 0;
+ int quoted = *text == '\'' || *text == '"';
+ int quote_char = '\0';
+ const char *colon = NULL;
+ char *file_to_match = NULL;
+ const char *symbol_start = text;
+ const char *orig_text = text;
+ size_t text_len;
+
+ /* Do we have an unquoted colon, as in "break foo.c:bar"? */
+ for (p = text; *p != '\0'; ++p)
+ {
+ if (*p == '\\' && p[1] == '\'')
+ p++;
+ else if (*p == '\'' || *p == '"')
+ {
+ quote_found = *p;
+ quote_char = *p++;
+ while (*p != '\0' && *p != quote_found)
+ {
+ if (*p == '\\' && p[1] == quote_found)
+ p++;
+ p++;
+ }
+
+ if (*p == quote_found)
+ quote_found = 0;
+ else
+ break; /* Hit the end of text. */
+ }
+#if HAVE_DOS_BASED_FILE_SYSTEM
+ /* If we have a DOS-style absolute file name at the beginning of
+ TEXT, and the colon after the drive letter is the only colon
+ we found, pretend the colon is not there. */
+ else if (p < text + 3 && *p == ':' && p == text + 1 + quoted)
+ ;
+#endif
+ else if (*p == ':' && !colon)
+ {
+ colon = p;
+ symbol_start = p + 1;
+ }
+ else if (strchr (current_language->la_word_break_characters(), *p))
+ symbol_start = p + 1;
+ }
+
+ if (quoted)
+ text++;
+ text_len = strlen (text);
+
+ /* Where is the file name? */
+ if (colon)
+ {
+ char *s;
+
+ file_to_match = (char *) xmalloc (colon - text + 1);
+ strncpy (file_to_match, text, colon - text + 1);
+ /* Remove trailing colons and quotes from the file name. */
+ for (s = file_to_match + (colon - text);
+ s > file_to_match;
+ s--)
+ if (*s == ':' || *s == quote_char)
+ *s = '\0';
+ }
+ /* If the text includes a colon, they want completion only on a
+ symbol name after the colon. Otherwise, we need to complete on
+ symbols as well as on files. */
+ if (colon)
+ {
+ list = make_file_symbol_completion_list (symbol_start, word,
+ file_to_match);
+ xfree (file_to_match);
+ }
+ else
+ {
+ list = make_symbol_completion_list (symbol_start, word);
+ /* If text includes characters which cannot appear in a file
+ name, they cannot be asking for completion on files. */
+ if (strcspn (text,
+ gdb_completer_file_name_break_characters) == text_len)
+ fn_list = make_source_files_completion_list (text, text);
+ }
+
+ n_syms = VEC_length (char_ptr, list);
+ n_files = VEC_length (char_ptr, fn_list);
+
+ /* Catenate fn_list[] onto the end of list[]. */
+ if (!n_syms)
+ {
+ VEC_free (char_ptr, list); /* Paranoia. */
+ list = fn_list;
+ fn_list = NULL;
+ }
+ else
+ {
+ char *fn;
+
+ for (ix = 0; VEC_iterate (char_ptr, fn_list, ix, fn); ++ix)
+ VEC_safe_push (char_ptr, list, fn);
+ VEC_free (char_ptr, fn_list);
+ }
+
+ if (n_syms && n_files)
+ {
+ /* Nothing. */
+ }
+ else if (n_files)
+ {
+ char *fn;
+
+ /* If we only have file names as possible completion, we should
+ bring them in sync with what rl_complete expects. The
+ problem is that if the user types "break /foo/b TAB", and the
+ possible completions are "/foo/bar" and "/foo/baz"
+ rl_complete expects us to return "bar" and "baz", without the
+ leading directories, as possible completions, because `word'
+ starts at the "b". But we ignore the value of `word' when we
+ call make_source_files_completion_list above (because that
+ would not DTRT when the completion results in both symbols
+ and file names), so make_source_files_completion_list returns
+ the full "/foo/bar" and "/foo/baz" strings. This produces
+ wrong results when, e.g., there's only one possible
+ completion, because rl_complete will prepend "/foo/" to each
+ candidate completion. The loop below removes that leading
+ part. */
+ for (ix = 0; VEC_iterate (char_ptr, list, ix, fn); ++ix)
+ {
+ memmove (fn, fn + (word - text),
+ strlen (fn) + 1 - (word - text));
+ }
+ }
+ else if (!n_syms)
+ {
+ /* No completions at all. As the final resort, try completing
+ on the entire text as a symbol. */
+ list = make_symbol_completion_list (orig_text, word);
+ }
+
+ return list;
+}
+
+/* Helper for expression_completer which recursively adds field and
+ method names from TYPE, a struct or union type, to the array
+ OUTPUT. */
+static void
+add_struct_fields (struct type *type, VEC (char_ptr) **output,
+ char *fieldname, int namelen)
+{
+ int i;
+ int computed_type_name = 0;
+ const char *type_name = NULL;
+
+ CHECK_TYPEDEF (type);
+ for (i = 0; i < TYPE_NFIELDS (type); ++i)
+ {
+ if (i < TYPE_N_BASECLASSES (type))
+ add_struct_fields (TYPE_BASECLASS (type, i),
+ output, fieldname, namelen);
+ else if (TYPE_FIELD_NAME (type, i))
+ {
+ if (TYPE_FIELD_NAME (type, i)[0] != '\0')
+ {
+ if (! strncmp (TYPE_FIELD_NAME (type, i),
+ fieldname, namelen))
+ VEC_safe_push (char_ptr, *output,
+ xstrdup (TYPE_FIELD_NAME (type, i)));
+ }
+ else if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_UNION)
+ {
+ /* Recurse into anonymous unions. */
+ add_struct_fields (TYPE_FIELD_TYPE (type, i),
+ output, fieldname, namelen);
+ }
+ }
+ }
+
+ for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
+ {
+ const char *name = TYPE_FN_FIELDLIST_NAME (type, i);
+
+ if (name && ! strncmp (name, fieldname, namelen))
+ {
+ if (!computed_type_name)
+ {
+ type_name = type_name_no_tag (type);
+ computed_type_name = 1;
+ }
+ /* Omit constructors from the completion list. */
+ if (!type_name || strcmp (type_name, name))
+ VEC_safe_push (char_ptr, *output, xstrdup (name));
+ }
+ }
+}
+
+/* Complete on expressions. Often this means completing on symbol
+ names, but some language parsers also have support for completing
+ field names. */
+VEC (char_ptr) *
+expression_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
+{
+ struct type *type = NULL;
+ char *fieldname;
+ const char *p;
+ volatile struct gdb_exception except;
+ enum type_code code = TYPE_CODE_UNDEF;
+
+ /* Perform a tentative parse of the expression, to see whether a
+ field completion is required. */
+ fieldname = NULL;
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ type = parse_expression_for_completion (text, &fieldname, &code);
+ }
+ if (except.reason < 0)
+ return NULL;
+ if (fieldname && type)
+ {
+ for (;;)
+ {
+ CHECK_TYPEDEF (type);
+ if (TYPE_CODE (type) != TYPE_CODE_PTR
+ && TYPE_CODE (type) != TYPE_CODE_REF)
+ break;
+ type = TYPE_TARGET_TYPE (type);
+ }
+
+ if (TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ {
+ int flen = strlen (fieldname);
+ VEC (char_ptr) *result = NULL;
+
+ add_struct_fields (type, &result, fieldname, flen);
+ xfree (fieldname);
+ return result;
+ }
+ }
+ else if (fieldname && code != TYPE_CODE_UNDEF)
+ {
+ VEC (char_ptr) *result;
+ struct cleanup *cleanup = make_cleanup (xfree, fieldname);
+
+ result = make_symbol_completion_type (fieldname, fieldname, code);
+ do_cleanups (cleanup);
+ return result;
+ }
+ xfree (fieldname);
+
+ /* Commands which complete on locations want to see the entire
+ argument. */
+ for (p = word;
+ p > text && p[-1] != ' ' && p[-1] != '\t';
+ p--)
+ ;
+
+ /* 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"
@@ -192,236 +489,193 @@ extern char *filename_completion_function (char *, int);
"file ../gdb.stabs/we" "ird" (needs to not break word at slash)
*/
-/* 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.
+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.
- 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.
- 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.
- 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. */
+ 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.
-char *
-line_completion_function (char *text, int matches, char *line_buffer, int point)
+ 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)
{
- static char **list = (char **) NULL; /* Cache of completions */
- static int index; /* Next cached completion */
- char *output = NULL;
- char *tmp_command, *p;
+ 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;
- 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. */
- xfree (list);
- }
- list = 0;
- index = 0;
+ /* 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();
- /* 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. */
+ /* Decide whether to complete on a list of gdb commands or on
+ symbols. */
+ tmp_command = (char *) alloca (point + 1);
+ p = tmp_command;
- rl_completer_word_break_characters =
- gdb_completer_word_break_characters;
+ /* The help command should complete help aliases. */
+ ignore_help_classes = reason != handle_help;
- /* Decide whether to complete on a list of gdb commands or on symbols. */
- tmp_command = (char *) alloca (point + 1);
- p = tmp_command;
+ 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);
- 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);
+ }
- if (point == 0)
- {
- /* An empty line we want to consider ambiguous; that is, it
- could be any command. */
- c = (struct cmd_list_element *) -1;
- result_list = 0;
- }
- else
- {
- c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
- }
+ /* Move p up to the next interesting thing. */
+ while (*p == ' ' || *p == '\t')
+ {
+ p++;
+ }
- /* 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;
- if (!c)
+ /* 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)
{
- /* It is an unrecognized command. So there are no
- possible completions. */
+ /* 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 if (c == (struct cmd_list_element *) -1)
+ else
{
- 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)
+ /* We're trying to complete on the command which was ambiguous.
+ This we can deal with. */
+ if (result_list)
{
- /* 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;
+ if (reason != handle_brkchars)
+ list = complete_on_cmdlist (*result_list->prefixlist, p,
+ word, ignore_help_classes);
}
else
{
- /* We're trying to complete on the command which was ambiguous.
- This we can deal with. */
- if (result_list)
- {
- list = complete_on_cmdlist (*result_list->prefixlist, p,
- word);
- }
- else
- {
- list = complete_on_cmdlist (cmdlist, p, word);
- }
- /* Insure that readline does the right thing with respect to
- inserting quotes. */
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
+ 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
+ }
+ else
+ {
+ /* We've recognized a full command. */
+
+ if (p == tmp_command + point)
{
- /* We've recognized a full command. */
+ /* There is no non-whitespace in the line beyond the
+ command. */
- if (p == tmp_command + point)
+ if (p[-1] == ' ' || p[-1] == '\t')
{
- /* 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)
{
- /* 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 "). */
- list = complete_on_cmdlist (*c->prefixlist, p, word);
-
- /* Insure that readline does the right thing
- with respect to inserting quotes. */
- rl_completer_word_break_characters =
- gdb_completer_command_word_break_characters;
- }
- else if (c->enums)
- {
- 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 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;
- }
- list = (*c->completer) (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. */
- 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;
- }
-
- list = complete_on_cmdlist (result_list, q, word);
+ /* 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);
- /* Insure that readline does the right thing
+ /* Ensure that readline does the right thing
with respect to inserting quotes. */
rl_completer_word_break_characters =
gdb_completer_command_word_break_characters;
}
- }
- 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 (reason == handle_help)
+ list = NULL;
else if (c->enums)
{
- list = complete_on_enum (c->enums, p, word);
+ 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. */
+ /* It is a normal command; what comes after it is
+ completed by the command's completer function. */
if (c->completer == filename_completer)
{
- /* See the commentary above about the specifics
- of file-name completion. */
+ /* 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;
@@ -430,71 +684,1062 @@ line_completion_function (char *text, int matches, char *line_buffer, int point)
rl_completer_word_break_characters =
gdb_completer_file_name_break_characters;
}
- list = (*c->completer) (p, word);
+ 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 we found a list of potential completions during initialization then
- dole them out one at a time. The vector of completions is NULL
- terminated, so 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 (reason != handle_brkchars)
+ list = complete_on_cmdlist (result_list, q, word,
+ ignore_help_classes);
- if (list)
- {
- output = list[index];
- if (output)
+ /* 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
{
- index++;
+ /* 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);
+ }
}
}
-#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 =
- gdb_completer_word_break_characters;
-#endif
+ return list;
+}
- return (output);
+/* 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);
}
-/* Skip over a possibly quoted word (as defined by the quote characters
- and word break characters the completer uses). Returns pointer to the
- location after the "word". */
-char *
-skip_quoted (char *str)
+/* Cleanup routine to free a completion tracker and reset the pointer
+ to NULL. */
+
+static void
+free_completion_tracker (void *p)
{
- char quote_char = '\0';
- char *scan;
+ completion_tracker_t *tracker_ptr = p;
- 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 (gdb_completer_quote_characters, *scan))
- {
- /* Found start of a quoted string. */
- quote_char = *scan;
- }
- else if (strchr (gdb_completer_word_break_characters, *scan))
- {
- break;
- }
- }
- return (scan);
+ 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);
+ enum gdb_signal 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 (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;
+}
+
+/* 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;
+ extern int _rl_completion_prefix_display_length;
+ extern int _rl_qsort_string_compare (const void *, const void *);
+ extern int _rl_print_completions_horizontally;
+ typedef int QSFUNC (const void *, const void *);
+
+ /* 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 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);
+}