/* Line completion stuff for GDB, the GNU debugger.
- Copyright (C) 2000-2015 Free Software Foundation, Inc.
+ Copyright (C) 2000-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "target.h"
#include "reggroups.h"
#include "user-regs.h"
+#include "arch-utils.h"
+#include "location.h"
#include "cli/cli-decode.h"
#include "completer.h"
+/* An enumeration of the various things a user might
+ attempt to complete for a location. */
+
+enum explicit_location_match_type
+{
+ /* The filename of a source file. */
+ MATCH_SOURCE,
+
+ /* The name of a function or method. */
+ MATCH_FUNCTION,
+
+ /* The name of a label. */
+ MATCH_LABEL
+};
+
/* Prototypes for local functions. */
static
char *line_completion_function (const char *text, int matches,
else if (word > text)
{
/* Return some portion of p. */
- q = xmalloc (strlen (p) + 5);
+ q = (char *) 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);
+ q = (char *) xmalloc (strlen (p) + (text - word) + 5);
strncpy (q, word, text - word);
q[text - word] = '\0';
strcat (q, p);
return return_val;
}
-/* Complete on locations, which might be of two possible forms:
+/* Complete on linespecs, which might be of two possible forms:
file:line
or
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)
+static VEC (char_ptr) *
+linespec_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;
char *s;
file_to_match = (char *) xmalloc (colon - text + 1);
- strncpy (file_to_match, text, colon - text + 1);
+ strncpy (file_to_match, text, colon - text);
+ file_to_match[colon - text] = '\0';
/* Remove trailing colons and quotes from the file name. */
for (s = file_to_match + (colon - text);
s > file_to_match;
return list;
}
+/* A helper function to collect explicit location matches for the given
+ LOCATION, which is attempting to match on WORD. */
+
+static VEC (char_ptr) *
+collect_explicit_location_matches (struct event_location *location,
+ enum explicit_location_match_type what,
+ const char *word)
+{
+ VEC (char_ptr) *matches = NULL;
+ const struct explicit_location *explicit_loc
+ = get_explicit_location (location);
+
+ switch (what)
+ {
+ case MATCH_SOURCE:
+ {
+ const char *text = (explicit_loc->source_filename == NULL
+ ? "" : explicit_loc->source_filename);
+
+ matches = make_source_files_completion_list (text, word);
+ }
+ break;
+
+ case MATCH_FUNCTION:
+ {
+ const char *text = (explicit_loc->function_name == NULL
+ ? "" : explicit_loc->function_name);
+
+ if (explicit_loc->source_filename != NULL)
+ {
+ const char *filename = explicit_loc->source_filename;
+
+ matches = make_file_symbol_completion_list (text, word, filename);
+ }
+ else
+ matches = make_symbol_completion_list (text, word);
+ }
+ break;
+
+ case MATCH_LABEL:
+ /* Not supported. */
+ break;
+
+ default:
+ gdb_assert_not_reached ("unhandled explicit_location_match_type");
+ }
+
+ return matches;
+}
+
+/* A convenience macro to (safely) back up P to the previous word. */
+
+static const char *
+backup_text_ptr (const char *p, const char *text)
+{
+ while (p > text && isspace (*p))
+ --p;
+ for (; p > text && !isspace (p[-1]); --p)
+ ;
+
+ return p;
+}
+
+/* A completer function for explicit locations. This function
+ completes both options ("-source", "-line", etc) and values. */
+
+static VEC (char_ptr) *
+explicit_location_completer (struct cmd_list_element *ignore,
+ struct event_location *location,
+ const char *text, const char *word)
+{
+ const char *p;
+ VEC (char_ptr) *matches = NULL;
+
+ /* Find the beginning of the word. This is necessary because
+ we need to know if we are completing an option name or value. We
+ don't get the leading '-' from the completer. */
+ p = backup_text_ptr (word, text);
+
+ if (*p == '-')
+ {
+ /* Completing on option name. */
+ static const char *const keywords[] =
+ {
+ "source",
+ "function",
+ "line",
+ "label",
+ NULL
+ };
+
+ /* Skip over the '-'. */
+ ++p;
+
+ return complete_on_enum (keywords, p, p);
+ }
+ else
+ {
+ /* Completing on value (or unknown). Get the previous word to see what
+ the user is completing on. */
+ size_t len, offset;
+ const char *new_word, *end;
+ enum explicit_location_match_type what;
+ struct explicit_location *explicit_loc
+ = get_explicit_location (location);
+
+ /* Backup P to the previous word, which should be the option
+ the user is attempting to complete. */
+ offset = word - p;
+ end = --p;
+ p = backup_text_ptr (p, text);
+ len = end - p;
+
+ if (strncmp (p, "-source", len) == 0)
+ {
+ what = MATCH_SOURCE;
+ new_word = explicit_loc->source_filename + offset;
+ }
+ else if (strncmp (p, "-function", len) == 0)
+ {
+ what = MATCH_FUNCTION;
+ new_word = explicit_loc->function_name + offset;
+ }
+ else if (strncmp (p, "-label", len) == 0)
+ {
+ what = MATCH_LABEL;
+ new_word = explicit_loc->label_name + offset;
+ }
+ else
+ {
+ /* The user isn't completing on any valid option name,
+ e.g., "break -source foo.c [tab]". */
+ return NULL;
+ }
+
+ /* If the user hasn't entered a search expression, e.g.,
+ "break -function <TAB><TAB>", new_word will be NULL, but
+ search routines require non-NULL search words. */
+ if (new_word == NULL)
+ new_word = "";
+
+ /* Now gather matches */
+ matches = collect_explicit_location_matches (location, what, new_word);
+ }
+
+ return matches;
+}
+
+/* A completer for locations. */
+
+VEC (char_ptr) *
+location_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
+{
+ VEC (char_ptr) *matches = NULL;
+ const char *copy = text;
+ struct event_location *location;
+
+ location = string_to_explicit_location (©, current_language, 1);
+ if (location != NULL)
+ {
+ struct cleanup *cleanup;
+
+ cleanup = make_cleanup_delete_event_location (location);
+ matches = explicit_location_completer (ignore, location, text, word);
+ do_cleanups (cleanup);
+ }
+ else
+ {
+ /* This is an address or linespec location.
+ Right now both of these are handled by the (old) linespec
+ completer. */
+ matches = linespec_location_completer (ignore, text, word);
+ }
+
+ return matches;
+}
+
/* Helper for expression_completer which recursively adds field and
method names from TYPE, a struct or union type, to the array
OUTPUT. */
int computed_type_name = 0;
const char *type_name = NULL;
- CHECK_TYPEDEF (type);
+ type = check_typedef (type);
for (i = 0; i < TYPE_NFIELDS (type); ++i)
{
if (i < TYPE_N_BASECLASSES (type))
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)
+ TRY
{
type = parse_expression_for_completion (text, &fieldname, &code);
}
- if (except.reason < 0)
- return NULL;
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ return NULL;
+ }
+ END_CATCH
+
if (fieldname && type)
{
for (;;)
{
- CHECK_TYPEDEF (type);
+ type = check_typedef (type);
if (TYPE_CODE (type) != TYPE_CODE_PTR
&& TYPE_CODE (type) != TYPE_CODE_REF)
break;
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);
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);
return list;
}
-/* Generate completions all at once. Returns a vector of strings.
- Each element is allocated with xmalloc. It can also return NULL if
- there are no completions.
+
+/* 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 = (completion_tracker_t *) 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.
VEC (char_ptr) *
complete_line (const char *text, const char *line_buffer, int point)
{
- return complete_line_internal (text, line_buffer,
- point, handle_completions);
+ 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) *return_val = NULL;
size_t len = strlen (word);
- enum gdb_signal signum;
+ int signum;
const char *signame;
for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum)
if (signum == GDB_SIGNAL_0)
continue;
- signame = gdb_signal_to_name (signum);
+ signame = gdb_signal_to_name ((enum gdb_signal) signum);
/* Ignore the unknown signal case. */
if (!signame || strcmp (signame, "?") == 0)
return return_val;
}
-/* Complete on a register or reggroup. */
+/* Bit-flags for selecting what the register and/or register-group
+ completer should complete on. */
-VEC (char_ptr) *
-reg_or_group_completer (struct cmd_list_element *ignore,
- const char *text, const char *word)
+enum reg_completer_target
+ {
+ complete_register_names = 0x1,
+ complete_reggroup_names = 0x2
+ };
+DEF_ENUM_FLAGS_TYPE (enum reg_completer_target, reg_completer_targets);
+
+/* Complete register names and/or reggroup names based on the value passed
+ in TARGETS. At least one bit in TARGETS must be set. */
+
+static VEC (char_ptr) *
+reg_or_group_completer_1 (struct cmd_list_element *ignore,
+ const char *text, const char *word,
+ reg_completer_targets targets)
{
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));
+ gdb_assert ((targets & (complete_register_names
+ | complete_reggroup_names)) != 0);
+ gdbarch = get_current_arch ();
- for (i = 0;
- (name = user_reg_map_regnum_to_name (gdbarch, i)) != NULL;
- i++)
+ if ((targets & complete_register_names) != 0)
{
- if (*name != '\0' && strncmp (word, name, len) == 0)
- VEC_safe_push (char_ptr, result, xstrdup (name));
+ int i;
+
+ 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))
+ if ((targets & complete_reggroup_names) != 0)
{
- name = reggroup_name (group);
- if (strncmp (word, name, len) == 0)
- VEC_safe_push (char_ptr, result, xstrdup (name));
+ struct reggroup *group;
+
+ 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;
}
+/* Perform completion on register and reggroup names. */
+
+VEC (char_ptr) *
+reg_or_group_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
+{
+ return reg_or_group_completer_1 (ignore, text, word,
+ (complete_register_names
+ | complete_reggroup_names));
+}
+
+/* Perform completion on reggroup names. */
+
+VEC (char_ptr) *
+reggroup_completer (struct cmd_list_element *ignore,
+ const char *text, const char *word)
+{
+ return reg_or_group_completer_1 (ignore, text, word,
+ complete_reggroup_names);
+}
/* Get the list of chars that are considered as word breaks
for the current command. */
{
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. ***");
+}
+\f
+/* 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);
+ }
+ }
+}
+\f
+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);
+}
projects / deliverable / binutils-gdb.git / blobdiff