Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5186 insertions, 0 deletions

diff --git a/src/insexpand.c b/src/insexpand.c
new file mode 100644
index 0000000..2737f2b
--- /dev/null
+++ b/src/insexpand.c
@@ -0,0 +1,5186 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * insexpand.c: functions for Insert mode completion
+ */
+
+#include "vim.h"
+
+/*
+ * Definitions used for CTRL-X submode.
+ * Note: If you change CTRL-X submode, you must also maintain ctrl_x_msgs[] and
+ * ctrl_x_mode_names[] below.
+ */
+# define CTRL_X_WANT_IDENT	0x100
+
+# define CTRL_X_NORMAL		0  // CTRL-N CTRL-P completion, default
+# define CTRL_X_NOT_DEFINED_YET	1
+# define CTRL_X_SCROLL		2
+# define CTRL_X_WHOLE_LINE	3
+# define CTRL_X_FILES		4
+# define CTRL_X_TAGS		(5 + CTRL_X_WANT_IDENT)
+# define CTRL_X_PATH_PATTERNS	(6 + CTRL_X_WANT_IDENT)
+# define CTRL_X_PATH_DEFINES	(7 + CTRL_X_WANT_IDENT)
+# define CTRL_X_FINISHED		8
+# define CTRL_X_DICTIONARY	(9 + CTRL_X_WANT_IDENT)
+# define CTRL_X_THESAURUS	(10 + CTRL_X_WANT_IDENT)
+# define CTRL_X_CMDLINE		11
+# define CTRL_X_FUNCTION	12
+# define CTRL_X_OMNI		13
+# define CTRL_X_SPELL		14
+# define CTRL_X_LOCAL_MSG	15	// only used in "ctrl_x_msgs"
+# define CTRL_X_EVAL		16	// for builtin function complete()
+# define CTRL_X_CMDLINE_CTRL_X	17	// CTRL-X typed in CTRL_X_CMDLINE
+
+# define CTRL_X_MSG(i) ctrl_x_msgs[(i) & ~CTRL_X_WANT_IDENT]
+
+// Message for CTRL-X mode, index is ctrl_x_mode.
+static char *ctrl_x_msgs[] =
+{
+    N_(" Keyword completion (^N^P)"), // CTRL_X_NORMAL, ^P/^N compl.
+    N_(" ^X mode (^]^D^E^F^I^K^L^N^O^Ps^U^V^Y)"),
+    NULL, // CTRL_X_SCROLL: depends on state
+    N_(" Whole line completion (^L^N^P)"),
+    N_(" File name completion (^F^N^P)"),
+    N_(" Tag completion (^]^N^P)"),
+    N_(" Path pattern completion (^N^P)"),
+    N_(" Definition completion (^D^N^P)"),
+    NULL, // CTRL_X_FINISHED
+    N_(" Dictionary completion (^K^N^P)"),
+    N_(" Thesaurus completion (^T^N^P)"),
+    N_(" Command-line completion (^V^N^P)"),
+    N_(" User defined completion (^U^N^P)"),
+    N_(" Omni completion (^O^N^P)"),
+    N_(" Spelling suggestion (s^N^P)"),
+    N_(" Keyword Local completion (^N^P)"),
+    NULL,   // CTRL_X_EVAL doesn't use msg.
+    N_(" Command-line completion (^V^N^P)"),
+};
+
+#if defined(FEAT_COMPL_FUNC) || defined(FEAT_EVAL)
+static char *ctrl_x_mode_names[] = {
+	"keyword",
+	"ctrl_x",
+	"scroll",
+	"whole_line",
+	"files",
+	"tags",
+	"path_patterns",
+	"path_defines",
+	"unknown",	    // CTRL_X_FINISHED
+	"dictionary",
+	"thesaurus",
+	"cmdline",
+	"function",
+	"omni",
+	"spell",
+	NULL,		    // CTRL_X_LOCAL_MSG only used in "ctrl_x_msgs"
+	"eval",
+	"cmdline",
+};
+#endif
+
+/*
+ * Array indexes used for cp_text[].
+ */
+#define CPT_ABBR	0	// "abbr"
+#define CPT_MENU	1	// "menu"
+#define CPT_KIND	2	// "kind"
+#define CPT_INFO	3	// "info"
+#define CPT_COUNT	4	// Number of entries
+
+/*
+ * Structure used to store one match for insert completion.
+ */
+typedef struct compl_S compl_T;
+struct compl_S
+{
+    compl_T	*cp_next;
+    compl_T	*cp_prev;
+    char_u	*cp_str;	// matched text
+    char_u	*(cp_text[CPT_COUNT]);	// text for the menu
+#ifdef FEAT_EVAL
+    typval_T	cp_user_data;
+#endif
+    char_u	*cp_fname;	// file containing the match, allocated when
+				// cp_flags has CP_FREE_FNAME
+    int		cp_flags;	// CP_ values
+    int		cp_number;	// sequence number
+};
+
+// values for cp_flags
+# define CP_ORIGINAL_TEXT   1	// the original text when the expansion begun
+# define CP_FREE_FNAME	    2	// cp_fname is allocated
+# define CP_CONT_S_IPOS	    4	// use CONT_S_IPOS for compl_cont_status
+# define CP_EQUAL	    8	// ins_compl_equal() always returns TRUE
+# define CP_ICASE	    16	// ins_compl_equal() ignores case
+# define CP_FAST	    32	// use fast_breakcheck instead of ui_breakcheck
+
+/*
+ * All the current matches are stored in a list.
+ * "compl_first_match" points to the start of the list.
+ * "compl_curr_match" points to the currently selected entry.
+ * "compl_shown_match" is different from compl_curr_match during
+ * ins_compl_get_exp().
+ * "compl_old_match" points to previous "compl_curr_match".
+ */
+static compl_T    *compl_first_match = NULL;
+static compl_T    *compl_curr_match = NULL;
+static compl_T    *compl_shown_match = NULL;
+static compl_T    *compl_old_match = NULL;
+
+// After using a cursor key <Enter> selects a match in the popup menu,
+// otherwise it inserts a line break.
+static int	  compl_enter_selects = FALSE;
+
+// When "compl_leader" is not NULL only matches that start with this string
+// are used.
+static char_u	  *compl_leader = NULL;
+
+static int	  compl_get_longest = FALSE;	// put longest common string
+						// in compl_leader
+
+static int	  compl_no_insert = FALSE;	// FALSE: select & insert
+						// TRUE: noinsert
+static int	  compl_no_select = FALSE;	// FALSE: select & insert
+						// TRUE: noselect
+static int	  compl_longest = FALSE;	// FALSE: insert full match
+						// TRUE: insert longest prefix
+
+// Selected one of the matches.  When FALSE the match was edited or using the
+// longest common string.
+static int	  compl_used_match;
+
+// didn't finish finding completions.
+static int	  compl_was_interrupted = FALSE;
+
+// Set when character typed while looking for matches and it means we should
+// stop looking for matches.
+static int	  compl_interrupted = FALSE;
+
+static int	  compl_restarting = FALSE;	// don't insert match
+
+// When the first completion is done "compl_started" is set.  When it's
+// FALSE the word to be completed must be located.
+static int	  compl_started = FALSE;
+
+// Which Ctrl-X mode are we in?
+static int	  ctrl_x_mode = CTRL_X_NORMAL;
+
+static int	  compl_matches = 0;	    // number of completion matches
+static char_u	  *compl_pattern = NULL;
+static int	  compl_direction = FORWARD;
+static int	  compl_shows_dir = FORWARD;
+static int	  compl_pending = 0;	    // > 1 for postponed CTRL-N
+static pos_T	  compl_startpos;
+// Length in bytes of the text being completed (this is deleted to be replaced
+// by the match.)
+static int	  compl_length = 0;
+static colnr_T	  compl_col = 0;	    // column where the text starts
+					    // that is being completed
+static char_u	  *compl_orig_text = NULL;  // text as it was before
+					    // completion started
+static int	  compl_cont_mode = 0;
+static expand_T	  compl_xp;
+
+// List of flags for method of completion.
+static int	  compl_cont_status = 0;
+# define CONT_ADDING	1	// "normal" or "adding" expansion
+# define CONT_INTRPT	(2 + 4)	// a ^X interrupted the current expansion
+				// it's set only iff N_ADDS is set
+# define CONT_N_ADDS	4	// next ^X<> will add-new or expand-current
+# define CONT_S_IPOS	8	// next ^X<> will set initial_pos?
+				// if so, word-wise-expansion will set SOL
+# define CONT_SOL	16	// pattern includes start of line, just for
+				// word-wise expansion, not set for ^X^L
+# define CONT_LOCAL	32	// for ctrl_x_mode 0, ^X^P/^X^N do a local
+				// expansion, (eg use complete=.)
+
+static int	  compl_opt_refresh_always = FALSE;
+static int	  compl_opt_suppress_empty = FALSE;
+
+static int ins_compl_add(char_u *str, int len, char_u *fname, char_u **cptext, typval_T *user_data, int cdir, int flags, int adup);
+static void ins_compl_longest_match(compl_T *match);
+static void ins_compl_del_pum(void);
+static void ins_compl_files(int count, char_u **files, int thesaurus, int flags, regmatch_T *regmatch, char_u *buf, int *dir);
+static char_u *find_line_end(char_u *ptr);
+static void ins_compl_free(void);
+static int  ins_compl_need_restart(void);
+static void ins_compl_new_leader(void);
+static int  get_compl_len(void);
+static void ins_compl_restart(void);
+static void ins_compl_set_original_text(char_u *str);
+static void ins_compl_fixRedoBufForLeader(char_u *ptr_arg);
+# if defined(FEAT_COMPL_FUNC) || defined(FEAT_EVAL)
+static void ins_compl_add_list(list_T *list);
+static void ins_compl_add_dict(dict_T *dict);
+# endif
+static int  ins_compl_key2dir(int c);
+static int  ins_compl_pum_key(int c);
+static int  ins_compl_key2count(int c);
+static void show_pum(int prev_w_wrow, int prev_w_leftcol);
+static unsigned  quote_meta(char_u *dest, char_u *str, int len);
+
+#ifdef FEAT_SPELL
+static void spell_back_to_badword(void);
+static int  spell_bad_len = 0;	// length of located bad word
+#endif
+
+/*
+ * CTRL-X pressed in Insert mode.
+ */
+    void
+ins_ctrl_x(void)
+{
+    if (!ctrl_x_mode_cmdline())
+    {
+	// if the next ^X<> won't ADD nothing, then reset compl_cont_status
+	if (compl_cont_status & CONT_N_ADDS)
+	    compl_cont_status |= CONT_INTRPT;
+	else
+	    compl_cont_status = 0;
+	// We're not sure which CTRL-X mode it will be yet
+	ctrl_x_mode = CTRL_X_NOT_DEFINED_YET;
+	edit_submode = (char_u *)_(CTRL_X_MSG(ctrl_x_mode));
+	edit_submode_pre = NULL;
+	showmode();
+    }
+    else
+	// CTRL-X in CTRL-X CTRL-V mode behaves differently to make CTRL-X
+	// CTRL-V look like CTRL-N
+	ctrl_x_mode = CTRL_X_CMDLINE_CTRL_X;
+
+    may_trigger_modechanged();
+}
+
+/*
+ * Functions to check the current CTRL-X mode.
+ */
+int ctrl_x_mode_none(void)
+    { return ctrl_x_mode == 0; }
+int ctrl_x_mode_normal(void)
+    { return ctrl_x_mode == CTRL_X_NORMAL; }
+int ctrl_x_mode_scroll(void)
+    { return ctrl_x_mode == CTRL_X_SCROLL; }
+int ctrl_x_mode_whole_line(void)
+    { return ctrl_x_mode == CTRL_X_WHOLE_LINE; }
+int ctrl_x_mode_files(void)
+    { return ctrl_x_mode == CTRL_X_FILES; }
+int ctrl_x_mode_tags(void)
+    { return ctrl_x_mode == CTRL_X_TAGS; }
+int ctrl_x_mode_path_patterns(void)
+    { return ctrl_x_mode == CTRL_X_PATH_PATTERNS; }
+int ctrl_x_mode_path_defines(void)
+    { return ctrl_x_mode == CTRL_X_PATH_DEFINES; }
+int ctrl_x_mode_dictionary(void)
+    { return ctrl_x_mode == CTRL_X_DICTIONARY; }
+int ctrl_x_mode_thesaurus(void)
+    { return ctrl_x_mode == CTRL_X_THESAURUS; }
+int ctrl_x_mode_cmdline(void)
+    { return ctrl_x_mode == CTRL_X_CMDLINE
+		|| ctrl_x_mode == CTRL_X_CMDLINE_CTRL_X; }
+int ctrl_x_mode_function(void)
+    { return ctrl_x_mode == CTRL_X_FUNCTION; }
+int ctrl_x_mode_omni(void)
+    { return ctrl_x_mode == CTRL_X_OMNI; }
+int ctrl_x_mode_spell(void)
+    { return ctrl_x_mode == CTRL_X_SPELL; }
+static int ctrl_x_mode_eval(void)
+    { return ctrl_x_mode == CTRL_X_EVAL; }
+int ctrl_x_mode_line_or_eval(void)
+    { return ctrl_x_mode == CTRL_X_WHOLE_LINE || ctrl_x_mode == CTRL_X_EVAL; }
+
+/*
+ * Whether other than default completion has been selected.
+ */
+    int
+ctrl_x_mode_not_default(void)
+{
+    return ctrl_x_mode != CTRL_X_NORMAL;
+}
+
+/*
+ * Whether CTRL-X was typed without a following character,
+ * not including when in CTRL-X CTRL-V mode.
+ */
+    int
+ctrl_x_mode_not_defined_yet(void)
+{
+    return ctrl_x_mode == CTRL_X_NOT_DEFINED_YET;
+}
+
+/*
+ * Return TRUE if currently in "normal" or "adding" insert completion matches
+ * state
+ */
+    int
+compl_status_adding(void)
+{
+    return compl_cont_status & CONT_ADDING;
+}
+
+/*
+ * Return TRUE if the completion pattern includes start of line, just for
+ * word-wise expansion.
+ */
+    int
+compl_status_sol(void)
+{
+    return compl_cont_status & CONT_SOL;
+}
+
+/*
+ * Return TRUE if ^X^P/^X^N will do a local completion (i.e. use complete=.)
+ */
+    int
+compl_status_local(void)
+{
+    return compl_cont_status & CONT_LOCAL;
+}
+
+/*
+ * Clear the completion status flags
+ */
+    void
+compl_status_clear(void)
+{
+    compl_cont_status = 0;
+}
+
+/*
+ * Return TRUE if completion is using the forward direction matches
+ */
+    static int
+compl_dir_forward(void)
+{
+    return compl_direction == FORWARD;
+}
+
+/*
+ * Return TRUE if currently showing forward completion matches
+ */
+    static int
+compl_shows_dir_forward(void)
+{
+    return compl_shows_dir == FORWARD;
+}
+
+/*
+ * Return TRUE if currently showing backward completion matches
+ */
+    static int
+compl_shows_dir_backward(void)
+{
+    return compl_shows_dir == BACKWARD;
+}
+
+/*
+ * Return TRUE if the 'dictionary' or 'thesaurus' option can be used.
+ */
+    int
+has_compl_option(int dict_opt)
+{
+    if (dict_opt ? (*curbuf->b_p_dict == NUL && *p_dict == NUL
+#ifdef FEAT_SPELL
+							&& !curwin->w_p_spell
+#endif
+							)
+		 : (*curbuf->b_p_tsr == NUL && *p_tsr == NUL
+#ifdef FEAT_COMPL_FUNC
+		     && *curbuf->b_p_tsrfu == NUL && *p_tsrfu == NUL
+#endif
+		   ))
+    {
+	ctrl_x_mode = CTRL_X_NORMAL;
+	edit_submode = NULL;
+	msg_attr(dict_opt ? _("'dictionary' option is empty")
+			  : _("'thesaurus' option is empty"),
+							      HL_ATTR(HLF_E));
+	if (emsg_silent == 0 && !in_assert_fails)
+	{
+	    vim_beep(BO_COMPL);
+	    setcursor();
+	    out_flush();
+#ifdef FEAT_EVAL
+	    if (!get_vim_var_nr(VV_TESTING))
+#endif
+		ui_delay(2004L, FALSE);
+	}
+	return FALSE;
+    }
+    return TRUE;
+}
+
+/*
+ * Is the character "c" a valid key to go to or keep us in CTRL-X mode?
+ * This depends on the current mode.
+ */
+    int
+vim_is_ctrl_x_key(int c)
+{
+    // Always allow ^R - let its results then be checked
+    if (c == Ctrl_R)
+	return TRUE;
+
+    // Accept <PageUp> and <PageDown> if the popup menu is visible.
+    if (ins_compl_pum_key(c))
+	return TRUE;
+
+    switch (ctrl_x_mode)
+    {
+	case 0:		    // Not in any CTRL-X mode
+	    return (c == Ctrl_N || c == Ctrl_P || c == Ctrl_X);
+	case CTRL_X_NOT_DEFINED_YET:
+	case CTRL_X_CMDLINE_CTRL_X:
+	    return (   c == Ctrl_X || c == Ctrl_Y || c == Ctrl_E
+		    || c == Ctrl_L || c == Ctrl_F || c == Ctrl_RSB
+		    || c == Ctrl_I || c == Ctrl_D || c == Ctrl_P
+		    || c == Ctrl_N || c == Ctrl_T || c == Ctrl_V
+		    || c == Ctrl_Q || c == Ctrl_U || c == Ctrl_O
+		    || c == Ctrl_S || c == Ctrl_K || c == 's'
+		    || c == Ctrl_Z);
+	case CTRL_X_SCROLL:
+	    return (c == Ctrl_Y || c == Ctrl_E);
+	case CTRL_X_WHOLE_LINE:
+	    return (c == Ctrl_L || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_FILES:
+	    return (c == Ctrl_F || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_DICTIONARY:
+	    return (c == Ctrl_K || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_THESAURUS:
+	    return (c == Ctrl_T || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_TAGS:
+	    return (c == Ctrl_RSB || c == Ctrl_P || c == Ctrl_N);
+#ifdef FEAT_FIND_ID
+	case CTRL_X_PATH_PATTERNS:
+	    return (c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_PATH_DEFINES:
+	    return (c == Ctrl_D || c == Ctrl_P || c == Ctrl_N);
+#endif
+	case CTRL_X_CMDLINE:
+	    return (c == Ctrl_V || c == Ctrl_Q || c == Ctrl_P || c == Ctrl_N
+		    || c == Ctrl_X);
+#ifdef FEAT_COMPL_FUNC
+	case CTRL_X_FUNCTION:
+	    return (c == Ctrl_U || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_OMNI:
+	    return (c == Ctrl_O || c == Ctrl_P || c == Ctrl_N);
+#endif
+	case CTRL_X_SPELL:
+	    return (c == Ctrl_S || c == Ctrl_P || c == Ctrl_N);
+	case CTRL_X_EVAL:
+	    return (c == Ctrl_P || c == Ctrl_N);
+    }
+    internal_error("vim_is_ctrl_x_key()");
+    return FALSE;
+}
+
+/*
+ * Return TRUE if "match" is the original text when the completion began.
+ */
+    static int
+match_at_original_text(compl_T *match)
+{
+    return match->cp_flags & CP_ORIGINAL_TEXT;
+}
+
+/*
+ * Returns TRUE if "match" is the first match in the completion list.
+ */
+    static int
+is_first_match(compl_T *match)
+{
+    return match == compl_first_match;
+}
+
+/*
+ * Return TRUE when character "c" is part of the item currently being
+ * completed.  Used to decide whether to abandon complete mode when the menu
+ * is visible.
+ */
+    int
+ins_compl_accept_char(int c)
+{
+    if (ctrl_x_mode & CTRL_X_WANT_IDENT)
+	// When expanding an identifier only accept identifier chars.
+	return vim_isIDc(c);
+
+    switch (ctrl_x_mode)
+    {
+	case CTRL_X_FILES:
+	    // When expanding file name only accept file name chars. But not
+	    // path separators, so that "proto/<Tab>" expands files in
+	    // "proto", not "proto/" as a whole
+	    return vim_isfilec(c) && !vim_ispathsep(c);
+
+	case CTRL_X_CMDLINE:
+	case CTRL_X_CMDLINE_CTRL_X:
+	case CTRL_X_OMNI:
+	    // Command line and Omni completion can work with just about any
+	    // printable character, but do stop at white space.
+	    return vim_isprintc(c) && !VIM_ISWHITE(c);
+
+	case CTRL_X_WHOLE_LINE:
+	    // For while line completion a space can be part of the line.
+	    return vim_isprintc(c);
+    }
+    return vim_iswordc(c);
+}
+
+/*
+ * Get the completed text by inferring the case of the originally typed text.
+ * If the result is in allocated memory "tofree" is set to it.
+ */
+    static char_u *
+ins_compl_infercase_gettext(
+	char_u	*str,
+	int	char_len,
+	int	compl_char_len,
+	int	min_len,
+	char_u  **tofree)
+{
+    int		*wca;			// Wide character array.
+    char_u	*p;
+    int		i, c;
+    int		has_lower = FALSE;
+    int		was_letter = FALSE;
+    garray_T	gap;
+
+    IObuff[0] = NUL;
+
+    // Allocate wide character array for the completion and fill it.
+    wca = ALLOC_MULT(int, char_len);
+    if (wca == NULL)
+	return IObuff;
+
+    p = str;
+    for (i = 0; i < char_len; ++i)
+	if (has_mbyte)
+	    wca[i] = mb_ptr2char_adv(&p);
+	else
+	    wca[i] = *(p++);
+
+    // Rule 1: Were any chars converted to lower?
+    p = compl_orig_text;
+    for (i = 0; i < min_len; ++i)
+    {
+	if (has_mbyte)
+	    c = mb_ptr2char_adv(&p);
+	else
+	    c = *(p++);
+	if (MB_ISLOWER(c))
+	{
+	    has_lower = TRUE;
+	    if (MB_ISUPPER(wca[i]))
+	    {
+		// Rule 1 is satisfied.
+		for (i = compl_char_len; i < char_len; ++i)
+		    wca[i] = MB_TOLOWER(wca[i]);
+		break;
+	    }
+	}
+    }
+
+    // Rule 2: No lower case, 2nd consecutive letter converted to
+    // upper case.
+    if (!has_lower)
+    {
+	p = compl_orig_text;
+	for (i = 0; i < min_len; ++i)
+	{
+	    if (has_mbyte)
+		c = mb_ptr2char_adv(&p);
+	    else
+		c = *(p++);
+	    if (was_letter && MB_ISUPPER(c) && MB_ISLOWER(wca[i]))
+	    {
+		// Rule 2 is satisfied.
+		for (i = compl_char_len; i < char_len; ++i)
+		    wca[i] = MB_TOUPPER(wca[i]);
+		break;
+	    }
+	    was_letter = MB_ISLOWER(c) || MB_ISUPPER(c);
+	}
+    }
+
+    // Copy the original case of the part we typed.
+    p = compl_orig_text;
+    for (i = 0; i < min_len; ++i)
+    {
+	if (has_mbyte)
+	    c = mb_ptr2char_adv(&p);
+	else
+	    c = *(p++);
+	if (MB_ISLOWER(c))
+	    wca[i] = MB_TOLOWER(wca[i]);
+	else if (MB_ISUPPER(c))
+	    wca[i] = MB_TOUPPER(wca[i]);
+    }
+
+    // Generate encoding specific output from wide character array.
+    p = IObuff;
+    i = 0;
+    ga_init2(&gap, 1, 500);
+    while (i < char_len)
+    {
+	if (gap.ga_data != NULL)
+	{
+	    if (ga_grow(&gap, 10) == FAIL)
+	    {
+		ga_clear(&gap);
+		return (char_u *)"[failed]";
+	    }
+	    p = (char_u *)gap.ga_data + gap.ga_len;
+	    if (has_mbyte)
+		gap.ga_len += (*mb_char2bytes)(wca[i++], p);
+	    else
+	    {
+		*p = wca[i++];
+		++gap.ga_len;
+	    }
+	}
+	else if ((p - IObuff) + 6 >= IOSIZE)
+	{
+	    // Multi-byte characters can occupy up to five bytes more than
+	    // ASCII characters, and we also need one byte for NUL, so when
+	    // getting to six bytes from the edge of IObuff switch to using a
+	    // growarray.  Add the character in the next round.
+	    if (ga_grow(&gap, IOSIZE) == FAIL)
+		return (char_u *)"[failed]";
+	    *p = NUL;
+	    STRCPY(gap.ga_data, IObuff);
+	    gap.ga_len = (int)STRLEN(IObuff);
+	}
+	else if (has_mbyte)
+	    p += (*mb_char2bytes)(wca[i++], p);
+	else
+	    *(p++) = wca[i++];
+    }
+    vim_free(wca);
+
+    if (gap.ga_data != NULL)
+    {
+	*tofree = gap.ga_data;
+	return gap.ga_data;
+    }
+
+    *p = NUL;
+    return IObuff;
+}
+
+/*
+ * This is like ins_compl_add(), but if 'ic' and 'inf' are set, then the
+ * case of the originally typed text is used, and the case of the completed
+ * text is inferred, ie this tries to work out what case you probably wanted
+ * the rest of the word to be in -- webb
+ */
+    int
+ins_compl_add_infercase(
+    char_u	*str_arg,
+    int		len,
+    int		icase,
+    char_u	*fname,
+    int		dir,
+    int		cont_s_ipos)  // next ^X<> will set initial_pos
+{
+    char_u	*str = str_arg;
+    char_u	*p;
+    int		char_len;		// count multi-byte characters
+    int		compl_char_len;
+    int		min_len;
+    int		flags = 0;
+    int		res;
+    char_u	*tofree = NULL;
+
+    if (p_ic && curbuf->b_p_inf && len > 0)
+    {
+	// Infer case of completed part.
+
+	// Find actual length of completion.
+	if (has_mbyte)
+	{
+	    p = str;
+	    char_len = 0;
+	    while (*p != NUL)
+	    {
+		MB_PTR_ADV(p);
+		++char_len;
+	    }
+	}
+	else
+	    char_len = len;
+
+	// Find actual length of original text.
+	if (has_mbyte)
+	{
+	    p = compl_orig_text;
+	    compl_char_len = 0;
+	    while (*p != NUL)
+	    {
+		MB_PTR_ADV(p);
+		++compl_char_len;
+	    }
+	}
+	else
+	    compl_char_len = compl_length;
+
+	// "char_len" may be smaller than "compl_char_len" when using
+	// thesaurus, only use the minimum when comparing.
+	min_len = char_len < compl_char_len ? char_len : compl_char_len;
+
+	str = ins_compl_infercase_gettext(str, char_len,
+					  compl_char_len, min_len, &tofree);
+    }
+    if (cont_s_ipos)
+	flags |= CP_CONT_S_IPOS;
+    if (icase)
+	flags |= CP_ICASE;
+
+    res = ins_compl_add(str, len, fname, NULL, NULL, dir, flags, FALSE);
+    vim_free(tofree);
+    return res;
+}
+
+/*
+ * Add a match to the list of matches. The arguments are:
+ *     str       - text of the match to add
+ *     len       - length of "str". If -1, then the length of "str" is
+ *		   computed.
+ *     fname     - file name to associate with this match.
+ *     cptext    - list of strings to use with this match (for abbr, menu, info
+ *		   and kind)
+ *     user_data - user supplied data (any vim type) for this match
+ *     cdir	 - match direction. If 0, use "compl_direction".
+ *     flags_arg - match flags (cp_flags)
+ *     adup	 - accept this match even if it is already present.
+ * If "cdir" is FORWARD, then the match is added after the current match.
+ * Otherwise, it is added before the current match.
+ *
+ * If the given string is already in the list of completions, then return
+ * NOTDONE, otherwise add it to the list and return OK.  If there is an error,
+ * maybe because alloc() returns NULL, then FAIL is returned.
+ */
+    static int
+ins_compl_add(
+    char_u	*str,
+    int		len,
+    char_u	*fname,
+    char_u	**cptext,	    // extra text for popup menu or NULL
+    typval_T	*user_data UNUSED,  // "user_data" entry or NULL
+    int		cdir,
+    int		flags_arg,
+    int		adup)		// accept duplicate match
+{
+    compl_T	*match;
+    int		dir = (cdir == 0 ? compl_direction : cdir);
+    int		flags = flags_arg;
+
+    if (flags & CP_FAST)
+	fast_breakcheck();
+    else
+	ui_breakcheck();
+    if (got_int)
+	return FAIL;
+    if (len < 0)
+	len = (int)STRLEN(str);
+
+    // If the same match is already present, don't add it.
+    if (compl_first_match != NULL && !adup)
+    {
+	match = compl_first_match;
+	do
+	{
+	    if (!match_at_original_text(match)
+		    && STRNCMP(match->cp_str, str, len) == 0
+		    && ((int)STRLEN(match->cp_str) <= len
+						 || match->cp_str[len] == NUL))
+		return NOTDONE;
+	    match = match->cp_next;
+	} while (match != NULL && !is_first_match(match));
+    }
+
+    // Remove any popup menu before changing the list of matches.
+    ins_compl_del_pum();
+
+    // Allocate a new match structure.
+    // Copy the values to the new match structure.
+    match = ALLOC_CLEAR_ONE(compl_T);
+    if (match == NULL)
+	return FAIL;
+    match->cp_number = -1;
+    if (flags & CP_ORIGINAL_TEXT)
+	match->cp_number = 0;
+    if ((match->cp_str = vim_strnsave(str, len)) == NULL)
+    {
+	vim_free(match);
+	return FAIL;
+    }
+
+    // match-fname is:
+    // - compl_curr_match->cp_fname if it is a string equal to fname.
+    // - a copy of fname, CP_FREE_FNAME is set to free later THE allocated mem.
+    // - NULL otherwise.	--Acevedo
+    if (fname != NULL
+	    && compl_curr_match != NULL
+	    && compl_curr_match->cp_fname != NULL
+	    && STRCMP(fname, compl_curr_match->cp_fname) == 0)
+	match->cp_fname = compl_curr_match->cp_fname;
+    else if (fname != NULL)
+    {
+	match->cp_fname = vim_strsave(fname);
+	flags |= CP_FREE_FNAME;
+    }
+    else
+	match->cp_fname = NULL;
+    match->cp_flags = flags;
+
+    if (cptext != NULL)
+    {
+	int i;
+
+	for (i = 0; i < CPT_COUNT; ++i)
+	    if (cptext[i] != NULL && *cptext[i] != NUL)
+		match->cp_text[i] = vim_strsave(cptext[i]);
+    }
+#ifdef FEAT_EVAL
+    if (user_data != NULL)
+	match->cp_user_data = *user_data;
+#endif
+
+    // Link the new match structure after (FORWARD) or before (BACKWARD) the
+    // current match in the list of matches .
+    if (compl_first_match == NULL)
+	match->cp_next = match->cp_prev = NULL;
+    else if (dir == FORWARD)
+    {
+	match->cp_next = compl_curr_match->cp_next;
+	match->cp_prev = compl_curr_match;
+    }
+    else	// BACKWARD
+    {
+	match->cp_next = compl_curr_match;
+	match->cp_prev = compl_curr_match->cp_prev;
+    }
+    if (match->cp_next)
+	match->cp_next->cp_prev = match;
+    if (match->cp_prev)
+	match->cp_prev->cp_next = match;
+    else	// if there's nothing before, it is the first match
+	compl_first_match = match;
+    compl_curr_match = match;
+
+    // Find the longest common string if still doing that.
+    if (compl_get_longest && (flags & CP_ORIGINAL_TEXT) == 0)
+	ins_compl_longest_match(match);
+
+    return OK;
+}
+
+/*
+ * Return TRUE if "str[len]" matches with match->cp_str, considering
+ * match->cp_flags.
+ */
+    static int
+ins_compl_equal(compl_T *match, char_u *str, int len)
+{
+    if (match->cp_flags & CP_EQUAL)
+	return TRUE;
+    if (match->cp_flags & CP_ICASE)
+	return STRNICMP(match->cp_str, str, (size_t)len) == 0;
+    return STRNCMP(match->cp_str, str, (size_t)len) == 0;
+}
+
+/*
+ * Reduce the longest common string for match "match".
+ */
+    static void
+ins_compl_longest_match(compl_T *match)
+{
+    char_u	*p, *s;
+    int		c1, c2;
+    int		had_match;
+
+    if (compl_leader == NULL)
+    {
+	// First match, use it as a whole.
+	compl_leader = vim_strsave(match->cp_str);
+	if (compl_leader == NULL)
+	    return;
+
+	had_match = (curwin->w_cursor.col > compl_col);
+	ins_compl_delete();
+	ins_bytes(compl_leader + get_compl_len());
+	ins_redraw(FALSE);
+
+	// When the match isn't there (to avoid matching itself) remove it
+	// again after redrawing.
+	if (!had_match)
+	    ins_compl_delete();
+	compl_used_match = FALSE;
+
+	return;
+    }
+
+    // Reduce the text if this match differs from compl_leader.
+    p = compl_leader;
+    s = match->cp_str;
+    while (*p != NUL)
+    {
+	if (has_mbyte)
+	{
+	    c1 = mb_ptr2char(p);
+	    c2 = mb_ptr2char(s);
+	}
+	else
+	{
+	    c1 = *p;
+	    c2 = *s;
+	}
+	if ((match->cp_flags & CP_ICASE)
+		? (MB_TOLOWER(c1) != MB_TOLOWER(c2)) : (c1 != c2))
+	    break;
+	if (has_mbyte)
+	{
+	    MB_PTR_ADV(p);
+	    MB_PTR_ADV(s);
+	}
+	else
+	{
+	    ++p;
+	    ++s;
+	}
+    }
+
+    if (*p != NUL)
+    {
+	// Leader was shortened, need to change the inserted text.
+	*p = NUL;
+	had_match = (curwin->w_cursor.col > compl_col);
+	ins_compl_delete();
+	ins_bytes(compl_leader + get_compl_len());
+	ins_redraw(FALSE);
+
+	// When the match isn't there (to avoid matching itself) remove it
+	// again after redrawing.
+	if (!had_match)
+	    ins_compl_delete();
+    }
+
+    compl_used_match = FALSE;
+}
+
+/*
+ * Add an array of matches to the list of matches.
+ * Frees matches[].
+ */
+    static void
+ins_compl_add_matches(
+    int		num_matches,
+    char_u	**matches,
+    int		icase)
+{
+    int		i;
+    int		add_r = OK;
+    int		dir = compl_direction;
+
+    for (i = 0; i < num_matches && add_r != FAIL; i++)
+	if ((add_r = ins_compl_add(matches[i], -1, NULL, NULL, NULL, dir,
+			       CP_FAST | (icase ? CP_ICASE : 0), FALSE)) == OK)
+	    // if dir was BACKWARD then honor it just once
+	    dir = FORWARD;
+    FreeWild(num_matches, matches);
+}
+
+/*
+ * Make the completion list cyclic.
+ * Return the number of matches (excluding the original).
+ */
+    static int
+ins_compl_make_cyclic(void)
+{
+    compl_T *match;
+    int	    count = 0;
+
+    if (compl_first_match == NULL)
+	return 0;
+
+    // Find the end of the list.
+    match = compl_first_match;
+    // there's always an entry for the compl_orig_text, it doesn't count.
+    while (match->cp_next != NULL && !is_first_match(match->cp_next))
+    {
+	match = match->cp_next;
+	++count;
+    }
+    match->cp_next = compl_first_match;
+    compl_first_match->cp_prev = match;
+
+    return count;
+}
+
+/*
+ * Return whether there currently is a shown match.
+ */
+    int
+ins_compl_has_shown_match(void)
+{
+    return compl_shown_match == NULL
+	|| compl_shown_match != compl_shown_match->cp_next;
+}
+
+/*
+ * Return whether the shown match is long enough.
+ */
+    int
+ins_compl_long_shown_match(void)
+{
+    return (int)STRLEN(compl_shown_match->cp_str)
+					    > curwin->w_cursor.col - compl_col;
+}
+
+/*
+ * Set variables that store noselect and noinsert behavior from the
+ * 'completeopt' value.
+ */
+    void
+completeopt_was_set(void)
+{
+    compl_no_insert = FALSE;
+    compl_no_select = FALSE;
+    compl_longest = FALSE;
+    if (strstr((char *)p_cot, "noselect") != NULL)
+	compl_no_select = TRUE;
+    if (strstr((char *)p_cot, "noinsert") != NULL)
+	compl_no_insert = TRUE;
+    if (strstr((char *)p_cot, "longest") != NULL)
+	compl_longest = TRUE;
+}
+
+
+// "compl_match_array" points the currently displayed list of entries in the
+// popup menu.  It is NULL when there is no popup menu.
+static pumitem_T *compl_match_array = NULL;
+static int compl_match_arraysize;
+
+/*
+ * Update the screen and when there is any scrolling remove the popup menu.
+ */
+    static void
+ins_compl_upd_pum(void)
+{
+    int		h;
+
+    if (compl_match_array == NULL)
+	return;
+
+    h = curwin->w_cline_height;
+    // Update the screen later, before drawing the popup menu over it.
+    pum_call_update_screen();
+    if (h != curwin->w_cline_height)
+	ins_compl_del_pum();
+}
+
+/*
+ * Remove any popup menu.
+ */
+    static void
+ins_compl_del_pum(void)
+{
+    if (compl_match_array == NULL)
+	return;
+
+    pum_undisplay();
+    VIM_CLEAR(compl_match_array);
+}
+
+/*
+ * Return TRUE if the popup menu should be displayed.
+ */
+    int
+pum_wanted(void)
+{
+    // 'completeopt' must contain "menu" or "menuone"
+    if (vim_strchr(p_cot, 'm') == NULL)
+	return FALSE;
+
+    // The display looks bad on a B&W display.
+    if (t_colors < 8
+#ifdef FEAT_GUI
+	    && !gui.in_use
+#endif
+	    )
+	return FALSE;
+    return TRUE;
+}
+
+/*
+ * Return TRUE if there are two or more matches to be shown in the popup menu.
+ * One if 'completopt' contains "menuone".
+ */
+    static int
+pum_enough_matches(void)
+{
+    compl_T     *compl;
+    int		i;
+
+    // Don't display the popup menu if there are no matches or there is only
+    // one (ignoring the original text).
+    compl = compl_first_match;
+    i = 0;
+    do
+    {
+	if (compl == NULL || (!match_at_original_text(compl) && ++i == 2))
+	    break;
+	compl = compl->cp_next;
+    } while (!is_first_match(compl));
+
+    if (strstr((char *)p_cot, "menuone") != NULL)
+	return (i >= 1);
+    return (i >= 2);
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Allocate Dict for the completed item.
+ * { word, abbr, menu, kind, info }
+ */
+    static dict_T *
+ins_compl_dict_alloc(compl_T *match)
+{
+    dict_T *dict = dict_alloc_lock(VAR_FIXED);
+
+    if (dict == NULL)
+	return NULL;
+
+    dict_add_string(dict, "word", match->cp_str);
+    dict_add_string(dict, "abbr", match->cp_text[CPT_ABBR]);
+    dict_add_string(dict, "menu", match->cp_text[CPT_MENU]);
+    dict_add_string(dict, "kind", match->cp_text[CPT_KIND]);
+    dict_add_string(dict, "info", match->cp_text[CPT_INFO]);
+    if (match->cp_user_data.v_type == VAR_UNKNOWN)
+	dict_add_string(dict, "user_data", (char_u *)"");
+    else
+	dict_add_tv(dict, "user_data", &match->cp_user_data);
+
+    return dict;
+}
+
+/*
+ * Trigger the CompleteChanged autocmd event. Invoked each time the Insert mode
+ * completion menu is changed.
+ */
+    static void
+trigger_complete_changed_event(int cur)
+{
+    dict_T	    *v_event;
+    dict_T	    *item;
+    static int	    recursive = FALSE;
+    save_v_event_T  save_v_event;
+
+    if (recursive)
+	return;
+
+    if (cur < 0)
+	item = dict_alloc();
+    else
+	item = ins_compl_dict_alloc(compl_curr_match);
+    if (item == NULL)
+	return;
+    v_event = get_v_event(&save_v_event);
+    dict_add_dict(v_event, "completed_item", item);
+    pum_set_event_info(v_event);
+    dict_set_items_ro(v_event);
+
+    recursive = TRUE;
+    textlock++;
+    apply_autocmds(EVENT_COMPLETECHANGED, NULL, NULL, FALSE, curbuf);
+    textlock--;
+    recursive = FALSE;
+
+    restore_v_event(v_event, &save_v_event);
+}
+#endif
+
+/*
+ * Build a popup menu to show the completion matches.
+ * Returns the popup menu entry that should be selected. Returns -1 if nothing
+ * should be selected.
+ */
+    static int
+ins_compl_build_pum(void)
+{
+    compl_T     *compl;
+    compl_T     *shown_compl = NULL;
+    int		did_find_shown_match = FALSE;
+    int		shown_match_ok = FALSE;
+    int		i;
+    int		cur = -1;
+    int		lead_len = 0;
+
+    // Need to build the popup menu list.
+    compl_match_arraysize = 0;
+    compl = compl_first_match;
+    if (compl_leader != NULL)
+	lead_len = (int)STRLEN(compl_leader);
+
+    do
+    {
+	if (!match_at_original_text(compl)
+		&& (compl_leader == NULL
+		    || ins_compl_equal(compl, compl_leader, lead_len)))
+	    ++compl_match_arraysize;
+	compl = compl->cp_next;
+    } while (compl != NULL && !is_first_match(compl));
+
+    if (compl_match_arraysize == 0)
+	return -1;
+
+    compl_match_array = ALLOC_CLEAR_MULT(pumitem_T, compl_match_arraysize);
+    if (compl_match_array == NULL)
+	return -1;
+
+    // If the current match is the original text don't find the first
+    // match after it, don't highlight anything.
+    if (match_at_original_text(compl_shown_match))
+	shown_match_ok = TRUE;
+
+    i = 0;
+    compl = compl_first_match;
+    do
+    {
+	if (!match_at_original_text(compl)
+		&& (compl_leader == NULL
+		    || ins_compl_equal(compl, compl_leader, lead_len)))
+	{
+	    if (!shown_match_ok)
+	    {
+		if (compl == compl_shown_match || did_find_shown_match)
+		{
+		    // This item is the shown match or this is the
+		    // first displayed item after the shown match.
+		    compl_shown_match = compl;
+		    did_find_shown_match = TRUE;
+		    shown_match_ok = TRUE;
+		}
+		else
+		    // Remember this displayed match for when the
+		    // shown match is just below it.
+		    shown_compl = compl;
+		cur = i;
+	    }
+
+	    if (compl->cp_text[CPT_ABBR] != NULL)
+		compl_match_array[i].pum_text =
+		    compl->cp_text[CPT_ABBR];
+	    else
+		compl_match_array[i].pum_text = compl->cp_str;
+	    compl_match_array[i].pum_kind = compl->cp_text[CPT_KIND];
+	    compl_match_array[i].pum_info = compl->cp_text[CPT_INFO];
+	    if (compl->cp_text[CPT_MENU] != NULL)
+		compl_match_array[i++].pum_extra =
+		    compl->cp_text[CPT_MENU];
+	    else
+		compl_match_array[i++].pum_extra = compl->cp_fname;
+	}
+
+	if (compl == compl_shown_match)
+	{
+	    did_find_shown_match = TRUE;
+
+	    // When the original text is the shown match don't set
+	    // compl_shown_match.
+	    if (match_at_original_text(compl))
+		shown_match_ok = TRUE;
+
+	    if (!shown_match_ok && shown_compl != NULL)
+	    {
+		// The shown match isn't displayed, set it to the
+		// previously displayed match.
+		compl_shown_match = shown_compl;
+		shown_match_ok = TRUE;
+	    }
+	}
+	compl = compl->cp_next;
+    } while (compl != NULL && !is_first_match(compl));
+
+    if (!shown_match_ok)    // no displayed match at all
+	cur = -1;
+
+    return cur;
+}
+
+/*
+ * Show the popup menu for the list of matches.
+ * Also adjusts "compl_shown_match" to an entry that is actually displayed.
+ */
+    void
+ins_compl_show_pum(void)
+{
+    int		i;
+    int		cur = -1;
+    colnr_T	col;
+
+    if (!pum_wanted() || !pum_enough_matches())
+	return;
+
+#if defined(FEAT_EVAL)
+    // Dirty hard-coded hack: remove any matchparen highlighting.
+    do_cmdline_cmd((char_u *)"if exists('g:loaded_matchparen')|:3match none|endif");
+#endif
+
+    // Update the screen later, before drawing the popup menu over it.
+    pum_call_update_screen();
+
+    if (compl_match_array == NULL)
+	// Need to build the popup menu list.
+	cur = ins_compl_build_pum();
+    else
+    {
+	// popup menu already exists, only need to find the current item.
+	for (i = 0; i < compl_match_arraysize; ++i)
+	    if (compl_match_array[i].pum_text == compl_shown_match->cp_str
+		    || compl_match_array[i].pum_text
+				      == compl_shown_match->cp_text[CPT_ABBR])
+	    {
+		cur = i;
+		break;
+	    }
+    }
+
+    if (compl_match_array == NULL)
+	return;
+
+    // In Replace mode when a $ is displayed at the end of the line only
+    // part of the screen would be updated.  We do need to redraw here.
+    dollar_vcol = -1;
+
+    // Compute the screen column of the start of the completed text.
+    // Use the cursor to get all wrapping and other settings right.
+    col = curwin->w_cursor.col;
+    curwin->w_cursor.col = compl_col;
+    pum_display(compl_match_array, compl_match_arraysize, cur);
+    curwin->w_cursor.col = col;
+
+#ifdef FEAT_EVAL
+    if (has_completechanged())
+	trigger_complete_changed_event(cur);
+#endif
+}
+
+#define DICT_FIRST	(1)	// use just first element in "dict"
+#define DICT_EXACT	(2)	// "dict" is the exact name of a file
+
+/*
+ * Add any identifiers that match the given pattern "pat" in the list of
+ * dictionary files "dict_start" to the list of completions.
+ */
+    static void
+ins_compl_dictionaries(
+    char_u	*dict_start,
+    char_u	*pat,
+    int		flags,		// DICT_FIRST and/or DICT_EXACT
+    int		thesaurus)	// Thesaurus completion
+{
+    char_u	*dict = dict_start;
+    char_u	*ptr;
+    char_u	*buf;
+    regmatch_T	regmatch;
+    char_u	**files;
+    int		count;
+    int		save_p_scs;
+    int		dir = compl_direction;
+
+    if (*dict == NUL)
+    {
+#ifdef FEAT_SPELL
+	// When 'dictionary' is empty and spell checking is enabled use
+	// "spell".
+	if (!thesaurus && curwin->w_p_spell)
+	    dict = (char_u *)"spell";
+	else
+#endif
+	    return;
+    }
+
+    buf = alloc(LSIZE);
+    if (buf == NULL)
+	return;
+    regmatch.regprog = NULL;	// so that we can goto theend
+
+    // If 'infercase' is set, don't use 'smartcase' here
+    save_p_scs = p_scs;
+    if (curbuf->b_p_inf)
+	p_scs = FALSE;
+
+    // When invoked to match whole lines for CTRL-X CTRL-L adjust the pattern
+    // to only match at the start of a line.  Otherwise just match the
+    // pattern. Also need to double backslashes.
+    if (ctrl_x_mode_line_or_eval())
+    {
+	char_u *pat_esc = vim_strsave_escaped(pat, (char_u *)"\\");
+	size_t len;
+
+	if (pat_esc == NULL)
+	    goto theend;
+	len = STRLEN(pat_esc) + 10;
+	ptr = alloc(len);
+	if (ptr == NULL)
+	{
+	    vim_free(pat_esc);
+	    goto theend;
+	}
+	vim_snprintf((char *)ptr, len, "^\\s*\\zs\\V%s", pat_esc);
+	regmatch.regprog = vim_regcomp(ptr, RE_MAGIC);
+	vim_free(pat_esc);
+	vim_free(ptr);
+    }
+    else
+    {
+	regmatch.regprog = vim_regcomp(pat, magic_isset() ? RE_MAGIC : 0);
+	if (regmatch.regprog == NULL)
+	    goto theend;
+    }
+
+    // ignore case depends on 'ignorecase', 'smartcase' and "pat"
+    regmatch.rm_ic = ignorecase(pat);
+    while (*dict != NUL && !got_int && !compl_interrupted)
+    {
+	// copy one dictionary file name into buf
+	if (flags == DICT_EXACT)
+	{
+	    count = 1;
+	    files = &dict;
+	}
+	else
+	{
+	    // Expand wildcards in the dictionary name, but do not allow
+	    // backticks (for security, the 'dict' option may have been set in
+	    // a modeline).
+	    copy_option_part(&dict, buf, LSIZE, ",");
+# ifdef FEAT_SPELL
+	    if (!thesaurus && STRCMP(buf, "spell") == 0)
+		count = -1;
+	    else
+# endif
+		if (vim_strchr(buf, '`') != NULL
+		    || expand_wildcards(1, &buf, &count, &files,
+						     EW_FILE|EW_SILENT) != OK)
+		count = 0;
+	}
+
+# ifdef FEAT_SPELL
+	if (count == -1)
+	{
+	    // Complete from active spelling.  Skip "\<" in the pattern, we
+	    // don't use it as a RE.
+	    if (pat[0] == '\\' && pat[1] == '<')
+		ptr = pat + 2;
+	    else
+		ptr = pat;
+	    spell_dump_compl(ptr, regmatch.rm_ic, &dir, 0);
+	}
+	else
+# endif
+	    if (count > 0)	// avoid warning for using "files" uninit
+	{
+	    ins_compl_files(count, files, thesaurus, flags,
+							&regmatch, buf, &dir);
+	    if (flags != DICT_EXACT)
+		FreeWild(count, files);
+	}
+	if (flags != 0)
+	    break;
+    }
+
+theend:
+    p_scs = save_p_scs;
+    vim_regfree(regmatch.regprog);
+    vim_free(buf);
+}
+
+/*
+ * Add all the words in the line "*buf_arg" from the thesaurus file "fname"
+ * skipping the word at 'skip_word'.  Returns OK on success.
+ */
+    static int
+thesaurus_add_words_in_line(
+	char_u	*fname,
+	char_u	**buf_arg,
+	int	dir,
+	char_u	*skip_word)
+{
+    int		status = OK;
+    char_u	*ptr;
+    char_u	*wstart;
+
+    // Add the other matches on the line
+    ptr = *buf_arg;
+    while (!got_int)
+    {
+	// Find start of the next word.  Skip white
+	// space and punctuation.
+	ptr = find_word_start(ptr);
+	if (*ptr == NUL || *ptr == NL)
+	    break;
+	wstart = ptr;
+
+	// Find end of the word.
+	if (has_mbyte)
+	    // Japanese words may have characters in
+	    // different classes, only separate words
+	    // with single-byte non-word characters.
+	    while (*ptr != NUL)
+	    {
+		int l = (*mb_ptr2len)(ptr);
+
+		if (l < 2 && !vim_iswordc(*ptr))
+		    break;
+		ptr += l;
+	    }
+	else
+	    ptr = find_word_end(ptr);
+
+	// Add the word. Skip the regexp match.
+	if (wstart != skip_word)
+	{
+	    status = ins_compl_add_infercase(wstart, (int)(ptr - wstart), p_ic,
+							fname, dir, FALSE);
+	    if (status == FAIL)
+		break;
+	}
+    }
+
+    *buf_arg = ptr;
+    return status;
+}
+
+/*
+ * Process "count" dictionary/thesaurus "files" and add the text matching
+ * "regmatch".
+ */
+    static void
+ins_compl_files(
+    int		count,
+    char_u	**files,
+    int		thesaurus,
+    int		flags,
+    regmatch_T	*regmatch,
+    char_u	*buf,
+    int		*dir)
+{
+    char_u	*ptr;
+    int		i;
+    FILE	*fp;
+    int		add_r;
+
+    for (i = 0; i < count && !got_int && !compl_interrupted; i++)
+    {
+	fp = mch_fopen((char *)files[i], "r");  // open dictionary file
+	if (flags != DICT_EXACT && !shortmess(SHM_COMPLETIONSCAN))
+	{
+	    msg_hist_off = TRUE;	// reset in msg_trunc_attr()
+	    vim_snprintf((char *)IObuff, IOSIZE,
+			      _("Scanning dictionary: %s"), (char *)files[i]);
+	    (void)msg_trunc_attr((char *)IObuff, TRUE, HL_ATTR(HLF_R));
+	}
+
+	if (fp == NULL)
+	    continue;
+
+	// Read dictionary file line by line.
+	// Check each line for a match.
+	while (!got_int && !compl_interrupted && !vim_fgets(buf, LSIZE, fp))
+	{
+	    ptr = buf;
+	    while (vim_regexec(regmatch, buf, (colnr_T)(ptr - buf)))
+	    {
+		ptr = regmatch->startp[0];
+		if (ctrl_x_mode_line_or_eval())
+		    ptr = find_line_end(ptr);
+		else
+		    ptr = find_word_end(ptr);
+		add_r = ins_compl_add_infercase(regmatch->startp[0],
+			(int)(ptr - regmatch->startp[0]),
+			p_ic, files[i], *dir, FALSE);
+		if (thesaurus)
+		{
+		    // For a thesaurus, add all the words in the line
+		    ptr = buf;
+		    add_r = thesaurus_add_words_in_line(files[i], &ptr, *dir,
+							regmatch->startp[0]);
+		}
+		if (add_r == OK)
+		    // if dir was BACKWARD then honor it just once
+		    *dir = FORWARD;
+		else if (add_r == FAIL)
+		    break;
+		// avoid expensive call to vim_regexec() when at end
+		// of line
+		if (*ptr == '\n' || got_int)
+		    break;
+	    }
+	    line_breakcheck();
+	    ins_compl_check_keys(50, FALSE);
+	}
+	fclose(fp);
+    }
+}
+
+/*
+ * Find the start of the next word.
+ * Returns a pointer to the first char of the word.  Also stops at a NUL.
+ */
+    char_u *
+find_word_start(char_u *ptr)
+{
+    if (has_mbyte)
+	while (*ptr != NUL && *ptr != '\n' && mb_get_class(ptr) <= 1)
+	    ptr += (*mb_ptr2len)(ptr);
+    else
+	while (*ptr != NUL && *ptr != '\n' && !vim_iswordc(*ptr))
+	    ++ptr;
+    return ptr;
+}
+
+/*
+ * Find the end of the word.  Assumes it starts inside a word.
+ * Returns a pointer to just after the word.
+ */
+    char_u *
+find_word_end(char_u *ptr)
+{
+    int		start_class;
+
+    if (has_mbyte)
+    {
+	start_class = mb_get_class(ptr);
+	if (start_class > 1)
+	    while (*ptr != NUL)
+	    {
+		ptr += (*mb_ptr2len)(ptr);
+		if (mb_get_class(ptr) != start_class)
+		    break;
+	    }
+    }
+    else
+	while (vim_iswordc(*ptr))
+	    ++ptr;
+    return ptr;
+}
+
+/*
+ * Find the end of the line, omitting CR and NL at the end.
+ * Returns a pointer to just after the line.
+ */
+    static char_u *
+find_line_end(char_u *ptr)
+{
+    char_u	*s;
+
+    s = ptr + STRLEN(ptr);
+    while (s > ptr && (s[-1] == CAR || s[-1] == NL))
+	--s;
+    return s;
+}
+
+/*
+ * Free the list of completions
+ */
+    static void
+ins_compl_free(void)
+{
+    compl_T *match;
+    int	    i;
+
+    VIM_CLEAR(compl_pattern);
+    VIM_CLEAR(compl_leader);
+
+    if (compl_first_match == NULL)
+	return;
+
+    ins_compl_del_pum();
+    pum_clear();
+
+    compl_curr_match = compl_first_match;
+    do
+    {
+	match = compl_curr_match;
+	compl_curr_match = compl_curr_match->cp_next;
+	vim_free(match->cp_str);
+	// several entries may use the same fname, free it just once.
+	if (match->cp_flags & CP_FREE_FNAME)
+	    vim_free(match->cp_fname);
+	for (i = 0; i < CPT_COUNT; ++i)
+	    vim_free(match->cp_text[i]);
+#ifdef FEAT_EVAL
+	clear_tv(&match->cp_user_data);
+#endif
+	vim_free(match);
+    } while (compl_curr_match != NULL && !is_first_match(compl_curr_match));
+    compl_first_match = compl_curr_match = NULL;
+    compl_shown_match = NULL;
+    compl_old_match = NULL;
+}
+
+/*
+ * Reset/clear the completion state.
+ */
+    void
+ins_compl_clear(void)
+{
+    compl_cont_status = 0;
+    compl_started = FALSE;
+    compl_matches = 0;
+    VIM_CLEAR(compl_pattern);
+    VIM_CLEAR(compl_leader);
+    edit_submode_extra = NULL;
+    VIM_CLEAR(compl_orig_text);
+    compl_enter_selects = FALSE;
+#ifdef FEAT_EVAL
+    // clear v:completed_item
+    set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc_lock(VAR_FIXED));
+#endif
+}
+
+/*
+ * Return TRUE when Insert completion is active.
+ */
+    int
+ins_compl_active(void)
+{
+    return compl_started;
+}
+
+/*
+ * Selected one of the matches.  When FALSE the match was edited or using the
+ * longest common string.
+ */
+    int
+ins_compl_used_match(void)
+{
+    return compl_used_match;
+}
+
+/*
+ * Initialize get longest common string.
+ */
+    void
+ins_compl_init_get_longest(void)
+{
+    compl_get_longest = FALSE;
+}
+
+/*
+ * Returns TRUE when insert completion is interrupted.
+ */
+    int
+ins_compl_interrupted(void)
+{
+    return compl_interrupted;
+}
+
+/*
+ * Returns TRUE if the <Enter> key selects a match in the completion popup
+ * menu.
+ */
+    int
+ins_compl_enter_selects(void)
+{
+    return compl_enter_selects;
+}
+
+/*
+ * Return the column where the text starts that is being completed
+ */
+    colnr_T
+ins_compl_col(void)
+{
+    return compl_col;
+}
+
+/*
+ * Return the length in bytes of the text being completed
+ */
+    int
+ins_compl_len(void)
+{
+    return compl_length;
+}
+
+/*
+ * Delete one character before the cursor and show the subset of the matches
+ * that match the word that is now before the cursor.
+ * Returns the character to be used, NUL if the work is done and another char
+ * to be got from the user.
+ */
+    int
+ins_compl_bs(void)
+{
+    char_u	*line;
+    char_u	*p;
+
+    line = ml_get_curline();
+    p = line + curwin->w_cursor.col;
+    MB_PTR_BACK(line, p);
+
+    // Stop completion when the whole word was deleted.  For Omni completion
+    // allow the word to be deleted, we won't match everything.
+    // Respect the 'backspace' option.
+    if ((int)(p - line) - (int)compl_col < 0
+	    || ((int)(p - line) - (int)compl_col == 0 && !ctrl_x_mode_omni())
+	    || ctrl_x_mode_eval()
+	    || (!can_bs(BS_START) && (int)(p - line) - (int)compl_col
+							- compl_length < 0))
+	return K_BS;
+
+    // Deleted more than what was used to find matches or didn't finish
+    // finding all matches: need to look for matches all over again.
+    if (curwin->w_cursor.col <= compl_col + compl_length
+						  || ins_compl_need_restart())
+	ins_compl_restart();
+
+    vim_free(compl_leader);
+    compl_leader = vim_strnsave(line + compl_col, (p - line) - compl_col);
+    if (compl_leader == NULL)
+	return K_BS;
+
+    ins_compl_new_leader();
+    if (compl_shown_match != NULL)
+	// Make sure current match is not a hidden item.
+	compl_curr_match = compl_shown_match;
+    return NUL;
+}
+
+/*
+ * Return TRUE when we need to find matches again, ins_compl_restart() is to
+ * be called.
+ */
+    static int
+ins_compl_need_restart(void)
+{
+    // Return TRUE if we didn't complete finding matches or when the
+    // 'completefunc' returned "always" in the "refresh" dictionary item.
+    return compl_was_interrupted
+	|| ((ctrl_x_mode_function() || ctrl_x_mode_omni())
+						  && compl_opt_refresh_always);
+}
+
+/*
+ * Called after changing "compl_leader".
+ * Show the popup menu with a different set of matches.
+ * May also search for matches again if the previous search was interrupted.
+ */
+    static void
+ins_compl_new_leader(void)
+{
+    ins_compl_del_pum();
+    ins_compl_delete();
+    ins_bytes(compl_leader + get_compl_len());
+    compl_used_match = FALSE;
+
+    if (compl_started)
+	ins_compl_set_original_text(compl_leader);
+    else
+    {
+#ifdef FEAT_SPELL
+	spell_bad_len = 0;	// need to redetect bad word
+#endif
+	// Matches were cleared, need to search for them now.  Before drawing
+	// the popup menu display the changed text before the cursor.  Set
+	// "compl_restarting" to avoid that the first match is inserted.
+	pum_call_update_screen();
+#ifdef FEAT_GUI
+	if (gui.in_use)
+	{
+	    // Show the cursor after the match, not after the redrawn text.
+	    setcursor();
+	    out_flush_cursor(FALSE, FALSE);
+	}
+#endif
+	compl_restarting = TRUE;
+	if (ins_complete(Ctrl_N, TRUE) == FAIL)
+	    compl_cont_status = 0;
+	compl_restarting = FALSE;
+    }
+
+    compl_enter_selects = !compl_used_match;
+
+    // Show the popup menu with a different set of matches.
+    ins_compl_show_pum();
+
+    // Don't let Enter select the original text when there is no popup menu.
+    if (compl_match_array == NULL)
+	compl_enter_selects = FALSE;
+}
+
+/*
+ * Return the length of the completion, from the completion start column to
+ * the cursor column.  Making sure it never goes below zero.
+ */
+    static int
+get_compl_len(void)
+{
+    int off = (int)curwin->w_cursor.col - (int)compl_col;
+
+    if (off < 0)
+	return 0;
+    return off;
+}
+
+/*
+ * Append one character to the match leader.  May reduce the number of
+ * matches.
+ */
+    void
+ins_compl_addleader(int c)
+{
+    int		cc;
+
+    if (stop_arrow() == FAIL)
+	return;
+    if (has_mbyte && (cc = (*mb_char2len)(c)) > 1)
+    {
+	char_u	buf[MB_MAXBYTES + 1];
+
+	(*mb_char2bytes)(c, buf);
+	buf[cc] = NUL;
+	ins_char_bytes(buf, cc);
+	if (compl_opt_refresh_always)
+	    AppendToRedobuff(buf);
+    }
+    else
+    {
+	ins_char(c);
+	if (compl_opt_refresh_always)
+	    AppendCharToRedobuff(c);
+    }
+
+    // If we didn't complete finding matches we must search again.
+    if (ins_compl_need_restart())
+	ins_compl_restart();
+
+    // When 'always' is set, don't reset compl_leader. While completing,
+    // cursor doesn't point original position, changing compl_leader would
+    // break redo.
+    if (!compl_opt_refresh_always)
+    {
+	vim_free(compl_leader);
+	compl_leader = vim_strnsave(ml_get_curline() + compl_col,
+					     curwin->w_cursor.col - compl_col);
+	if (compl_leader != NULL)
+	    ins_compl_new_leader();
+    }
+}
+
+/*
+ * Setup for finding completions again without leaving CTRL-X mode.  Used when
+ * BS or a key was typed while still searching for matches.
+ */
+    static void
+ins_compl_restart(void)
+{
+    ins_compl_free();
+    compl_started = FALSE;
+    compl_matches = 0;
+    compl_cont_status = 0;
+    compl_cont_mode = 0;
+}
+
+/*
+ * Set the first match, the original text.
+ */
+    static void
+ins_compl_set_original_text(char_u *str)
+{
+    char_u	*p;
+
+    // Replace the original text entry.
+    // The CP_ORIGINAL_TEXT flag is either at the first item or might possibly
+    // be at the last item for backward completion
+    if (match_at_original_text(compl_first_match))	// safety check
+    {
+	p = vim_strsave(str);
+	if (p != NULL)
+	{
+	    vim_free(compl_first_match->cp_str);
+	    compl_first_match->cp_str = p;
+	}
+    }
+    else if (compl_first_match->cp_prev != NULL
+	    && match_at_original_text(compl_first_match->cp_prev))
+    {
+       p = vim_strsave(str);
+       if (p != NULL)
+       {
+	   vim_free(compl_first_match->cp_prev->cp_str);
+	   compl_first_match->cp_prev->cp_str = p;
+       }
+    }
+}
+
+/*
+ * Append one character to the match leader.  May reduce the number of
+ * matches.
+ */
+    void
+ins_compl_addfrommatch(void)
+{
+    char_u	*p;
+    int		len = (int)curwin->w_cursor.col - (int)compl_col;
+    int		c;
+    compl_T	*cp;
+
+    p = compl_shown_match->cp_str;
+    if ((int)STRLEN(p) <= len)   // the match is too short
+    {
+	// When still at the original match use the first entry that matches
+	// the leader.
+	if (!match_at_original_text(compl_shown_match))
+	    return;
+
+	p = NULL;
+	for (cp = compl_shown_match->cp_next; cp != NULL
+		&& !is_first_match(cp); cp = cp->cp_next)
+	{
+	    if (compl_leader == NULL
+		    || ins_compl_equal(cp, compl_leader,
+			(int)STRLEN(compl_leader)))
+	    {
+		p = cp->cp_str;
+		break;
+	    }
+	}
+	if (p == NULL || (int)STRLEN(p) <= len)
+	    return;
+    }
+    p += len;
+    c = PTR2CHAR(p);
+    ins_compl_addleader(c);
+}
+
+/*
+ * Set the CTRL-X completion mode based on the key "c" typed after a CTRL-X.
+ * Uses the global variables: ctrl_x_mode, edit_submode, edit_submode_pre,
+ * compl_cont_mode and compl_cont_status.
+ * Returns TRUE when the character is not to be inserted.
+ */
+    static int
+set_ctrl_x_mode(int c)
+{
+    int retval = FALSE;
+
+    switch (c)
+    {
+	case Ctrl_E:
+	case Ctrl_Y:
+	    // scroll the window one line up or down
+	    ctrl_x_mode = CTRL_X_SCROLL;
+	    if (!(State & REPLACE_FLAG))
+		edit_submode = (char_u *)_(" (insert) Scroll (^E/^Y)");
+	    else
+		edit_submode = (char_u *)_(" (replace) Scroll (^E/^Y)");
+	    edit_submode_pre = NULL;
+	    showmode();
+	    break;
+	case Ctrl_L:
+	    // complete whole line
+	    ctrl_x_mode = CTRL_X_WHOLE_LINE;
+	    break;
+	case Ctrl_F:
+	    // complete filenames
+	    ctrl_x_mode = CTRL_X_FILES;
+	    break;
+	case Ctrl_K:
+	    // complete words from a dictionary
+	    ctrl_x_mode = CTRL_X_DICTIONARY;
+	    break;
+	case Ctrl_R:
+	    // Register insertion without exiting CTRL-X mode
+	    // Simply allow ^R to happen without affecting ^X mode
+	    break;
+	case Ctrl_T:
+	    // complete words from a thesaurus
+	    ctrl_x_mode = CTRL_X_THESAURUS;
+	    break;
+#ifdef FEAT_COMPL_FUNC
+	case Ctrl_U:
+	    // user defined completion
+	    ctrl_x_mode = CTRL_X_FUNCTION;
+	    break;
+	case Ctrl_O:
+	    // omni completion
+	    ctrl_x_mode = CTRL_X_OMNI;
+	    break;
+#endif
+	case 's':
+	case Ctrl_S:
+	    // complete spelling suggestions
+	    ctrl_x_mode = CTRL_X_SPELL;
+#ifdef FEAT_SPELL
+	    ++emsg_off;	// Avoid getting the E756 error twice.
+	    spell_back_to_badword();
+	    --emsg_off;
+#endif
+	    break;
+	case Ctrl_RSB:
+	    // complete tag names
+	    ctrl_x_mode = CTRL_X_TAGS;
+	    break;
+#ifdef FEAT_FIND_ID
+	case Ctrl_I:
+	case K_S_TAB:
+	    // complete keywords from included files
+	    ctrl_x_mode = CTRL_X_PATH_PATTERNS;
+	    break;
+	case Ctrl_D:
+	    // complete definitions from included files
+	    ctrl_x_mode = CTRL_X_PATH_DEFINES;
+	    break;
+#endif
+	case Ctrl_V:
+	case Ctrl_Q:
+	    // complete vim commands
+	    ctrl_x_mode = CTRL_X_CMDLINE;
+	    break;
+	case Ctrl_Z:
+	    // stop completion
+	    ctrl_x_mode = CTRL_X_NORMAL;
+	    edit_submode = NULL;
+	    showmode();
+	    retval = TRUE;
+	    break;
+	case Ctrl_P:
+	case Ctrl_N:
+	    // ^X^P means LOCAL expansion if nothing interrupted (eg we
+	    // just started ^X mode, or there were enough ^X's to cancel
+	    // the previous mode, say ^X^F^X^X^P or ^P^X^X^X^P, see below)
+	    // do normal expansion when interrupting a different mode (say
+	    // ^X^F^X^P or ^P^X^X^P, see below)
+	    // nothing changes if interrupting mode 0, (eg, the flag
+	    // doesn't change when going to ADDING mode  -- Acevedo
+	    if (!(compl_cont_status & CONT_INTRPT))
+		compl_cont_status |= CONT_LOCAL;
+	    else if (compl_cont_mode != 0)
+		compl_cont_status &= ~CONT_LOCAL;
+	    // FALLTHROUGH
+	default:
+	    // If we have typed at least 2 ^X's... for modes != 0, we set
+	    // compl_cont_status = 0 (eg, as if we had just started ^X
+	    // mode).
+	    // For mode 0, we set "compl_cont_mode" to an impossible
+	    // value, in both cases ^X^X can be used to restart the same
+	    // mode (avoiding ADDING mode).
+	    // Undocumented feature: In a mode != 0 ^X^P and ^X^X^P start
+	    // 'complete' and local ^P expansions respectively.
+	    // In mode 0 an extra ^X is needed since ^X^P goes to ADDING
+	    // mode  -- Acevedo
+	    if (c == Ctrl_X)
+	    {
+		if (compl_cont_mode != 0)
+		    compl_cont_status = 0;
+		else
+		    compl_cont_mode = CTRL_X_NOT_DEFINED_YET;
+	    }
+	    ctrl_x_mode = CTRL_X_NORMAL;
+	    edit_submode = NULL;
+	    showmode();
+	    break;
+    }
+
+    return retval;
+}
+
+/*
+ * Stop insert completion mode
+ */
+    static int
+ins_compl_stop(int c, int prev_mode, int retval)
+{
+    char_u	*ptr;
+    int		want_cindent;
+
+    // Get here when we have finished typing a sequence of ^N and
+    // ^P or other completion characters in CTRL-X mode.  Free up
+    // memory that was used, and make sure we can redo the insert.
+    if (compl_curr_match != NULL || compl_leader != NULL || c == Ctrl_E)
+    {
+	// If any of the original typed text has been changed, eg when
+	// ignorecase is set, we must add back-spaces to the redo
+	// buffer.  We add as few as necessary to delete just the part
+	// of the original text that has changed.
+	// When using the longest match, edited the match or used
+	// CTRL-E then don't use the current match.
+	if (compl_curr_match != NULL && compl_used_match && c != Ctrl_E)
+	    ptr = compl_curr_match->cp_str;
+	else
+	    ptr = NULL;
+	ins_compl_fixRedoBufForLeader(ptr);
+    }
+
+    want_cindent = (get_can_cindent() && cindent_on());
+
+    // When completing whole lines: fix indent for 'cindent'.
+    // Otherwise, break line if it's too long.
+    if (compl_cont_mode == CTRL_X_WHOLE_LINE)
+    {
+	// re-indent the current line
+	if (want_cindent)
+	{
+	    do_c_expr_indent();
+	    want_cindent = FALSE;	// don't do it again
+	}
+    }
+    else
+    {
+	int prev_col = curwin->w_cursor.col;
+
+	// put the cursor on the last char, for 'tw' formatting
+	if (prev_col > 0)
+	    dec_cursor();
+	// only format when something was inserted
+	if (!arrow_used && !ins_need_undo_get() && c != Ctrl_E)
+	    insertchar(NUL, 0, -1);
+	if (prev_col > 0
+		&& ml_get_curline()[curwin->w_cursor.col] != NUL)
+	    inc_cursor();
+    }
+
+    // If the popup menu is displayed pressing CTRL-Y means accepting
+    // the selection without inserting anything.  When
+    // compl_enter_selects is set the Enter key does the same.
+    if ((c == Ctrl_Y || (compl_enter_selects
+		    && (c == CAR || c == K_KENTER || c == NL)))
+	    && pum_visible())
+	retval = TRUE;
+
+    // CTRL-E means completion is Ended, go back to the typed text.
+    // but only do this, if the Popup is still visible
+    if (c == Ctrl_E)
+    {
+	char_u *p = NULL;
+
+	ins_compl_delete();
+	if (compl_leader != NULL)
+	    p = compl_leader;
+	else if (compl_first_match != NULL)
+	    p = compl_orig_text;
+	if (p != NULL)
+	{
+	    int	    compl_len = get_compl_len();
+	    int	    len = (int)STRLEN(p);
+
+	    if (len > compl_len)
+		ins_bytes_len(p + compl_len, len - compl_len);
+	}
+	retval = TRUE;
+    }
+
+    auto_format(FALSE, TRUE);
+
+    // Trigger the CompleteDonePre event to give scripts a chance to
+    // act upon the completion before clearing the info, and restore
+    // ctrl_x_mode, so that complete_info() can be used.
+    ctrl_x_mode = prev_mode;
+    ins_apply_autocmds(EVENT_COMPLETEDONEPRE);
+
+    ins_compl_free();
+    compl_started = FALSE;
+    compl_matches = 0;
+    if (!shortmess(SHM_COMPLETIONMENU))
+	msg_clr_cmdline();	// necessary for "noshowmode"
+    ctrl_x_mode = CTRL_X_NORMAL;
+    compl_enter_selects = FALSE;
+    if (edit_submode != NULL)
+    {
+	edit_submode = NULL;
+	showmode();
+    }
+
+    if (c == Ctrl_C && cmdwin_type != 0)
+	// Avoid the popup menu remains displayed when leaving the
+	// command line window.
+	update_screen(0);
+    // Indent now if a key was typed that is in 'cinkeys'.
+    if (want_cindent && in_cinkeys(KEY_COMPLETE, ' ', inindent(0)))
+	do_c_expr_indent();
+    // Trigger the CompleteDone event to give scripts a chance to act
+    // upon the end of completion.
+    ins_apply_autocmds(EVENT_COMPLETEDONE);
+
+    return retval;
+}
+
+/*
+ * Prepare for Insert mode completion, or stop it.
+ * Called just after typing a character in Insert mode.
+ * Returns TRUE when the character is not to be inserted;
+ */
+    int
+ins_compl_prep(int c)
+{
+    int		retval = FALSE;
+    int		prev_mode = ctrl_x_mode;
+
+    // Forget any previous 'special' messages if this is actually
+    // a ^X mode key - bar ^R, in which case we wait to see what it gives us.
+    if (c != Ctrl_R && vim_is_ctrl_x_key(c))
+	edit_submode_extra = NULL;
+
+    // Ignore end of Select mode mapping and mouse scroll/movement.
+    if (c == K_SELECT || c == K_MOUSEDOWN || c == K_MOUSEUP
+	    || c == K_MOUSELEFT || c == K_MOUSERIGHT || c == K_MOUSEMOVE
+	    || c == K_COMMAND || c == K_SCRIPT_COMMAND)
+	return retval;
+
+#ifdef FEAT_PROP_POPUP
+    // Ignore mouse events in a popup window
+    if (is_mouse_key(c))
+    {
+	// Ignore drag and release events, the position does not need to be in
+	// the popup and it may have just closed.
+	if (c == K_LEFTRELEASE
+		|| c == K_LEFTRELEASE_NM
+		|| c == K_MIDDLERELEASE
+		|| c == K_RIGHTRELEASE
+		|| c == K_X1RELEASE
+		|| c == K_X2RELEASE
+		|| c == K_LEFTDRAG
+		|| c == K_MIDDLEDRAG
+		|| c == K_RIGHTDRAG
+		|| c == K_X1DRAG
+		|| c == K_X2DRAG)
+	    return retval;
+	if (popup_visible)
+	{
+	    int	    row = mouse_row;
+	    int	    col = mouse_col;
+	    win_T   *wp = mouse_find_win(&row, &col, FIND_POPUP);
+
+	    if (wp != NULL && WIN_IS_POPUP(wp))
+		return retval;
+	}
+    }
+#endif
+
+    if (ctrl_x_mode == CTRL_X_CMDLINE_CTRL_X && c != Ctrl_X)
+    {
+	if (c == Ctrl_V || c == Ctrl_Q || c == Ctrl_Z || ins_compl_pum_key(c)
+		|| !vim_is_ctrl_x_key(c))
+	{
+	    // Not starting another completion mode.
+	    ctrl_x_mode = CTRL_X_CMDLINE;
+
+	    // CTRL-X CTRL-Z should stop completion without inserting anything
+	    if (c == Ctrl_Z)
+		retval = TRUE;
+	}
+	else
+	{
+	    ctrl_x_mode = CTRL_X_CMDLINE;
+
+	    // Other CTRL-X keys first stop completion, then start another
+	    // completion mode.
+	    ins_compl_prep(' ');
+	    ctrl_x_mode = CTRL_X_NOT_DEFINED_YET;
+	}
+    }
+
+    // Set "compl_get_longest" when finding the first matches.
+    if (ctrl_x_mode_not_defined_yet()
+			   || (ctrl_x_mode_normal() && !compl_started))
+    {
+	compl_get_longest = compl_longest;
+	compl_used_match = TRUE;
+
+    }
+
+    if (ctrl_x_mode_not_defined_yet())
+	// We have just typed CTRL-X and aren't quite sure which CTRL-X mode
+	// it will be yet.  Now we decide.
+	retval = set_ctrl_x_mode(c);
+    else if (ctrl_x_mode_not_default())
+    {
+	// We're already in CTRL-X mode, do we stay in it?
+	if (!vim_is_ctrl_x_key(c))
+	{
+	    if (ctrl_x_mode_scroll())
+		ctrl_x_mode = CTRL_X_NORMAL;
+	    else
+		ctrl_x_mode = CTRL_X_FINISHED;
+	    edit_submode = NULL;
+	}
+	showmode();
+    }
+
+    if (compl_started || ctrl_x_mode == CTRL_X_FINISHED)
+    {
+	// Show error message from attempted keyword completion (probably
+	// 'Pattern not found') until another key is hit, then go back to
+	// showing what mode we are in.
+	showmode();
+	if ((ctrl_x_mode_normal() && c != Ctrl_N && c != Ctrl_P
+				       && c != Ctrl_R && !ins_compl_pum_key(c))
+		|| ctrl_x_mode == CTRL_X_FINISHED)
+	    retval = ins_compl_stop(c, prev_mode, retval);
+    }
+    else if (ctrl_x_mode == CTRL_X_LOCAL_MSG)
+	// Trigger the CompleteDone event to give scripts a chance to act
+	// upon the (possibly failed) completion.
+	ins_apply_autocmds(EVENT_COMPLETEDONE);
+
+    may_trigger_modechanged();
+
+    // reset continue_* if we left expansion-mode, if we stay they'll be
+    // (re)set properly in ins_complete()
+    if (!vim_is_ctrl_x_key(c))
+    {
+	compl_cont_status = 0;
+	compl_cont_mode = 0;
+    }
+
+    return retval;
+}
+
+/*
+ * Fix the redo buffer for the completion leader replacing some of the typed
+ * text.  This inserts backspaces and appends the changed text.
+ * "ptr" is the known leader text or NUL.
+ */
+    static void
+ins_compl_fixRedoBufForLeader(char_u *ptr_arg)
+{
+    int	    len;
+    char_u  *p;
+    char_u  *ptr = ptr_arg;
+
+    if (ptr == NULL)
+    {
+	if (compl_leader != NULL)
+	    ptr = compl_leader;
+	else
+	    return;  // nothing to do
+    }
+    if (compl_orig_text != NULL)
+    {
+	p = compl_orig_text;
+	for (len = 0; p[len] != NUL && p[len] == ptr[len]; ++len)
+	    ;
+	if (len > 0)
+	    len -= (*mb_head_off)(p, p + len);
+	for (p += len; *p != NUL; MB_PTR_ADV(p))
+	    AppendCharToRedobuff(K_BS);
+    }
+    else
+	len = 0;
+    if (ptr != NULL)
+	AppendToRedobuffLit(ptr + len, -1);
+}
+
+/*
+ * Loops through the list of windows, loaded-buffers or non-loaded-buffers
+ * (depending on flag) starting from buf and looking for a non-scanned
+ * buffer (other than curbuf).	curbuf is special, if it is called with
+ * buf=curbuf then it has to be the first call for a given flag/expansion.
+ *
+ * Returns the buffer to scan, if any, otherwise returns curbuf -- Acevedo
+ */
+    static buf_T *
+ins_compl_next_buf(buf_T *buf, int flag)
+{
+    static win_T *wp = NULL;
+
+    if (flag == 'w')		// just windows
+    {
+	if (buf == curbuf || !win_valid(wp))
+	    // first call for this flag/expansion or window was closed
+	    wp = curwin;
+	while ((wp = (wp->w_next != NULL ? wp->w_next : firstwin)) != curwin
+		&& wp->w_buffer->b_scanned)
+	    ;
+	buf = wp->w_buffer;
+    }
+    else
+	// 'b' (just loaded buffers), 'u' (just non-loaded buffers) or 'U'
+	// (unlisted buffers)
+	// When completing whole lines skip unloaded buffers.
+	while ((buf = (buf->b_next != NULL ? buf->b_next : firstbuf)) != curbuf
+		&& ((flag == 'U'
+			? buf->b_p_bl
+			: (!buf->b_p_bl
+			    || (buf->b_ml.ml_mfp == NULL) != (flag == 'u')))
+		    || buf->b_scanned))
+	    ;
+    return buf;
+}
+
+#ifdef FEAT_COMPL_FUNC
+
+# ifdef FEAT_EVAL
+static callback_T cfu_cb;	    // 'completefunc' callback function
+static callback_T ofu_cb;	    // 'omnifunc' callback function
+static callback_T tsrfu_cb;	    // 'thesaurusfunc' callback function
+# endif
+
+/*
+ * Copy a global callback function to a buffer local callback.
+ */
+    static void
+copy_global_to_buflocal_cb(callback_T *globcb, callback_T *bufcb)
+{
+    free_callback(bufcb);
+    if (globcb->cb_name != NULL && *globcb->cb_name != NUL)
+	copy_callback(bufcb, globcb);
+}
+
+/*
+ * Parse the 'completefunc' option value and set the callback function.
+ * Invoked when the 'completefunc' option is set. The option value can be a
+ * name of a function (string), or function(<name>) or funcref(<name>) or a
+ * lambda expression.
+ */
+    char *
+did_set_completefunc(optset_T *args UNUSED)
+{
+    if (option_set_callback_func(curbuf->b_p_cfu, &cfu_cb) == FAIL)
+	return e_invalid_argument;
+
+    set_buflocal_cfu_callback(curbuf);
+
+    return NULL;
+}
+
+/*
+ * Copy the global 'completefunc' callback function to the buffer-local
+ * 'completefunc' callback for "buf".
+ */
+    void
+set_buflocal_cfu_callback(buf_T *buf UNUSED)
+{
+# ifdef FEAT_EVAL
+    copy_global_to_buflocal_cb(&cfu_cb, &buf->b_cfu_cb);
+# endif
+}
+
+/*
+ * Parse the 'omnifunc' option value and set the callback function.
+ * Invoked when the 'omnifunc' option is set. The option value can be a
+ * name of a function (string), or function(<name>) or funcref(<name>) or a
+ * lambda expression.
+ */
+    char *
+did_set_omnifunc(optset_T *args UNUSED)
+{
+    if (option_set_callback_func(curbuf->b_p_ofu, &ofu_cb) == FAIL)
+	return e_invalid_argument;
+
+    set_buflocal_ofu_callback(curbuf);
+    return NULL;
+}
+
+/*
+ * Copy the global 'omnifunc' callback function to the buffer-local 'omnifunc'
+ * callback for "buf".
+ */
+    void
+set_buflocal_ofu_callback(buf_T *buf UNUSED)
+{
+# ifdef FEAT_EVAL
+    copy_global_to_buflocal_cb(&ofu_cb, &buf->b_ofu_cb);
+# endif
+}
+
+/*
+ * Parse the 'thesaurusfunc' option value and set the callback function.
+ * Invoked when the 'thesaurusfunc' option is set. The option value can be a
+ * name of a function (string), or function(<name>) or funcref(<name>) or a
+ * lambda expression.
+ */
+    char *
+did_set_thesaurusfunc(optset_T *args UNUSED)
+{
+    int	retval;
+
+    if (*curbuf->b_p_tsrfu != NUL)
+    {
+	// buffer-local option set
+	retval = option_set_callback_func(curbuf->b_p_tsrfu,
+							&curbuf->b_tsrfu_cb);
+    }
+    else
+    {
+	// global option set
+	retval = option_set_callback_func(p_tsrfu, &tsrfu_cb);
+    }
+
+    return retval == FAIL ? e_invalid_argument : NULL;
+}
+
+/*
+ * Mark the global 'completefunc' 'omnifunc' and 'thesaurusfunc' callbacks with
+ * "copyID" so that they are not garbage collected.
+ */
+    int
+set_ref_in_insexpand_funcs(int copyID)
+{
+    int abort = FALSE;
+
+    abort = set_ref_in_callback(&cfu_cb, copyID);
+    abort = abort || set_ref_in_callback(&ofu_cb, copyID);
+    abort = abort || set_ref_in_callback(&tsrfu_cb, copyID);
+
+    return abort;
+}
+
+/*
+ * Get the user-defined completion function name for completion "type"
+ */
+    static char_u *
+get_complete_funcname(int type)
+{
+    switch (type)
+    {
+	case CTRL_X_FUNCTION:
+	    return curbuf->b_p_cfu;
+	case CTRL_X_OMNI:
+	    return curbuf->b_p_ofu;
+	case CTRL_X_THESAURUS:
+	    return *curbuf->b_p_tsrfu == NUL ? p_tsrfu : curbuf->b_p_tsrfu;
+	default:
+	    return (char_u *)"";
+    }
+}
+
+/*
+ * Get the callback to use for insert mode completion.
+ */
+    static callback_T *
+get_insert_callback(int type)
+{
+    if (type == CTRL_X_FUNCTION)
+	return &curbuf->b_cfu_cb;
+    if (type == CTRL_X_OMNI)
+	return &curbuf->b_ofu_cb;
+    // CTRL_X_THESAURUS
+    return (*curbuf->b_p_tsrfu != NUL) ? &curbuf->b_tsrfu_cb : &tsrfu_cb;
+}
+
+/*
+ * Execute user defined complete function 'completefunc', 'omnifunc' or
+ * 'thesaurusfunc', and get matches in "matches".
+ * "type" is either CTRL_X_OMNI or CTRL_X_FUNCTION or CTRL_X_THESAURUS.
+ */
+    static void
+expand_by_function(int type, char_u *base)
+{
+    list_T      *matchlist = NULL;
+    dict_T	*matchdict = NULL;
+    typval_T	args[3];
+    char_u	*funcname;
+    pos_T	pos;
+    callback_T	*cb;
+    typval_T	rettv;
+    int		save_State = State;
+    int		retval;
+
+    funcname = get_complete_funcname(type);
+    if (*funcname == NUL)
+	return;
+
+    // Call 'completefunc' to obtain the list of matches.
+    args[0].v_type = VAR_NUMBER;
+    args[0].vval.v_number = 0;
+    args[1].v_type = VAR_STRING;
+    args[1].vval.v_string = base != NULL ? base : (char_u *)"";
+    args[2].v_type = VAR_UNKNOWN;
+
+    pos = curwin->w_cursor;
+    // Lock the text to avoid weird things from happening.  Also disallow
+    // switching to another window, it should not be needed and may end up in
+    // Insert mode in another buffer.
+    ++textlock;
+
+    cb = get_insert_callback(type);
+    retval = call_callback(cb, 0, &rettv, 2, args);
+
+    // Call a function, which returns a list or dict.
+    if (retval == OK)
+    {
+	switch (rettv.v_type)
+	{
+	    case VAR_LIST:
+		matchlist = rettv.vval.v_list;
+		break;
+	    case VAR_DICT:
+		matchdict = rettv.vval.v_dict;
+		break;
+	    case VAR_SPECIAL:
+		if (rettv.vval.v_number == VVAL_NONE)
+		    compl_opt_suppress_empty = TRUE;
+		// FALLTHROUGH
+	    default:
+		// TODO: Give error message?
+		clear_tv(&rettv);
+		break;
+	}
+    }
+    --textlock;
+
+    curwin->w_cursor = pos;	// restore the cursor position
+    validate_cursor();
+    if (!EQUAL_POS(curwin->w_cursor, pos))
+    {
+	emsg(_(e_complete_function_deleted_text));
+	goto theend;
+    }
+
+    if (matchlist != NULL)
+	ins_compl_add_list(matchlist);
+    else if (matchdict != NULL)
+	ins_compl_add_dict(matchdict);
+
+theend:
+    // Restore State, it might have been changed.
+    State = save_State;
+
+    if (matchdict != NULL)
+	dict_unref(matchdict);
+    if (matchlist != NULL)
+	list_unref(matchlist);
+}
+#endif // FEAT_COMPL_FUNC
+
+#if defined(FEAT_COMPL_FUNC) || defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Add a match to the list of matches from a typeval_T.
+ * If the given string is already in the list of completions, then return
+ * NOTDONE, otherwise add it to the list and return OK.  If there is an error,
+ * maybe because alloc() returns NULL, then FAIL is returned.
+ * When "fast" is TRUE use fast_breakcheck() instead of ui_breakcheck().
+ */
+    static int
+ins_compl_add_tv(typval_T *tv, int dir, int fast)
+{
+    char_u	*word;
+    int		dup = FALSE;
+    int		empty = FALSE;
+    int		flags = fast ? CP_FAST : 0;
+    char_u	*(cptext[CPT_COUNT]);
+    typval_T	user_data;
+    int		status;
+
+    user_data.v_type = VAR_UNKNOWN;
+    if (tv->v_type == VAR_DICT && tv->vval.v_dict != NULL)
+    {
+	word = dict_get_string(tv->vval.v_dict, "word", FALSE);
+	cptext[CPT_ABBR] = dict_get_string(tv->vval.v_dict, "abbr", FALSE);
+	cptext[CPT_MENU] = dict_get_string(tv->vval.v_dict, "menu", FALSE);
+	cptext[CPT_KIND] = dict_get_string(tv->vval.v_dict, "kind", FALSE);
+	cptext[CPT_INFO] = dict_get_string(tv->vval.v_dict, "info", FALSE);
+	dict_get_tv(tv->vval.v_dict, "user_data", &user_data);
+	if (dict_get_string(tv->vval.v_dict, "icase", FALSE) != NULL
+				  && dict_get_number(tv->vval.v_dict, "icase"))
+	    flags |= CP_ICASE;
+	if (dict_get_string(tv->vval.v_dict, "dup", FALSE) != NULL)
+	    dup = dict_get_number(tv->vval.v_dict, "dup");
+	if (dict_get_string(tv->vval.v_dict, "empty", FALSE) != NULL)
+	    empty = dict_get_number(tv->vval.v_dict, "empty");
+	if (dict_get_string(tv->vval.v_dict, "equal", FALSE) != NULL
+				  && dict_get_number(tv->vval.v_dict, "equal"))
+	    flags |= CP_EQUAL;
+    }
+    else
+    {
+	word = tv_get_string_chk(tv);
+	CLEAR_FIELD(cptext);
+    }
+    if (word == NULL || (!empty && *word == NUL))
+    {
+	clear_tv(&user_data);
+	return FAIL;
+    }
+    status = ins_compl_add(word, -1, NULL, cptext, &user_data, dir, flags, dup);
+    if (status != OK)
+	clear_tv(&user_data);
+    return status;
+}
+
+/*
+ * Add completions from a list.
+ */
+    static void
+ins_compl_add_list(list_T *list)
+{
+    listitem_T	*li;
+    int		dir = compl_direction;
+
+    // Go through the List with matches and add each of them.
+    CHECK_LIST_MATERIALIZE(list);
+    FOR_ALL_LIST_ITEMS(list, li)
+    {
+	if (ins_compl_add_tv(&li->li_tv, dir, TRUE) == OK)
+	    // if dir was BACKWARD then honor it just once
+	    dir = FORWARD;
+	else if (did_emsg)
+	    break;
+    }
+}
+
+/*
+ * Add completions from a dict.
+ */
+    static void
+ins_compl_add_dict(dict_T *dict)
+{
+    dictitem_T	*di_refresh;
+    dictitem_T	*di_words;
+
+    // Check for optional "refresh" item.
+    compl_opt_refresh_always = FALSE;
+    di_refresh = dict_find(dict, (char_u *)"refresh", 7);
+    if (di_refresh != NULL && di_refresh->di_tv.v_type == VAR_STRING)
+    {
+	char_u	*v = di_refresh->di_tv.vval.v_string;
+
+	if (v != NULL && STRCMP(v, (char_u *)"always") == 0)
+	    compl_opt_refresh_always = TRUE;
+    }
+
+    // Add completions from a "words" list.
+    di_words = dict_find(dict, (char_u *)"words", 5);
+    if (di_words != NULL && di_words->di_tv.v_type == VAR_LIST)
+	ins_compl_add_list(di_words->di_tv.vval.v_list);
+}
+
+/*
+ * Start completion for the complete() function.
+ * "startcol" is where the matched text starts (1 is first column).
+ * "list" is the list of matches.
+ */
+    static void
+set_completion(colnr_T startcol, list_T *list)
+{
+    int save_w_wrow = curwin->w_wrow;
+    int save_w_leftcol = curwin->w_leftcol;
+    int flags = CP_ORIGINAL_TEXT;
+
+    // If already doing completions stop it.
+    if (ctrl_x_mode_not_default())
+	ins_compl_prep(' ');
+    ins_compl_clear();
+    ins_compl_free();
+    compl_get_longest = compl_longest;
+
+    compl_direction = FORWARD;
+    if (startcol > curwin->w_cursor.col)
+	startcol = curwin->w_cursor.col;
+    compl_col = startcol;
+    compl_length = (int)curwin->w_cursor.col - (int)startcol;
+    // compl_pattern doesn't need to be set
+    compl_orig_text = vim_strnsave(ml_get_curline() + compl_col, compl_length);
+    if (p_ic)
+	flags |= CP_ICASE;
+    if (compl_orig_text == NULL || ins_compl_add(compl_orig_text,
+					      -1, NULL, NULL, NULL, 0,
+					      flags | CP_FAST, FALSE) != OK)
+	return;
+
+    ctrl_x_mode = CTRL_X_EVAL;
+
+    ins_compl_add_list(list);
+    compl_matches = ins_compl_make_cyclic();
+    compl_started = TRUE;
+    compl_used_match = TRUE;
+    compl_cont_status = 0;
+
+    compl_curr_match = compl_first_match;
+    int no_select = compl_no_select || compl_longest;
+    if (compl_no_insert || no_select)
+    {
+	ins_complete(K_DOWN, FALSE);
+	if (no_select)
+	    // Down/Up has no real effect.
+	    ins_complete(K_UP, FALSE);
+    }
+    else
+	ins_complete(Ctrl_N, FALSE);
+    compl_enter_selects = compl_no_insert;
+
+    // Lazily show the popup menu, unless we got interrupted.
+    if (!compl_interrupted)
+	show_pum(save_w_wrow, save_w_leftcol);
+    may_trigger_modechanged();
+    out_flush();
+}
+
+/*
+ * "complete()" function
+ */
+    void
+f_complete(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    int	    startcol;
+
+    if (in_vim9script()
+	    && (check_for_number_arg(argvars, 0) == FAIL
+		|| check_for_list_arg(argvars, 1) == FAIL))
+	return;
+
+    if ((State & MODE_INSERT) == 0)
+    {
+	emsg(_(e_complete_can_only_be_used_in_insert_mode));
+	return;
+    }
+
+    // Check for undo allowed here, because if something was already inserted
+    // the line was already saved for undo and this check isn't done.
+    if (!undo_allowed())
+	return;
+
+    if (check_for_nonnull_list_arg(argvars, 1) != FAIL)
+    {
+	startcol = (int)tv_get_number_chk(&argvars[0], NULL);
+	if (startcol > 0)
+	    set_completion(startcol - 1, argvars[1].vval.v_list);
+    }
+}
+
+/*
+ * "complete_add()" function
+ */
+    void
+f_complete_add(typval_T *argvars, typval_T *rettv)
+{
+    if (in_vim9script() && check_for_string_or_dict_arg(argvars, 0) == FAIL)
+	return;
+
+    rettv->vval.v_number = ins_compl_add_tv(&argvars[0], 0, FALSE);
+}
+
+/*
+ * "complete_check()" function
+ */
+    void
+f_complete_check(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    int		saved = RedrawingDisabled;
+
+    RedrawingDisabled = 0;
+    ins_compl_check_keys(0, TRUE);
+    rettv->vval.v_number = ins_compl_interrupted();
+    RedrawingDisabled = saved;
+}
+
+/*
+ * Return Insert completion mode name string
+ */
+    static char_u *
+ins_compl_mode(void)
+{
+    if (ctrl_x_mode_not_defined_yet() || ctrl_x_mode_scroll() || compl_started)
+	return (char_u *)ctrl_x_mode_names[ctrl_x_mode & ~CTRL_X_WANT_IDENT];
+
+    return (char_u *)"";
+}
+
+/*
+ * Assign the sequence number to all the completion matches which don't have
+ * one assigned yet.
+ */
+    static void
+ins_compl_update_sequence_numbers(void)
+{
+    int		number = 0;
+    compl_T	*match;
+
+    if (compl_dir_forward())
+    {
+	// search backwards for the first valid (!= -1) number.
+	// This should normally succeed already at the first loop
+	// cycle, so it's fast!
+	for (match = compl_curr_match->cp_prev; match != NULL
+		&& !is_first_match(match); match = match->cp_prev)
+	    if (match->cp_number != -1)
+	    {
+		number = match->cp_number;
+		break;
+	    }
+	if (match != NULL)
+	    // go up and assign all numbers which are not assigned
+	    // yet
+	    for (match = match->cp_next;
+		    match != NULL && match->cp_number == -1;
+					   match = match->cp_next)
+		match->cp_number = ++number;
+    }
+    else // BACKWARD
+    {
+	// search forwards (upwards) for the first valid (!= -1)
+	// number.  This should normally succeed already at the
+	// first loop cycle, so it's fast!
+	for (match = compl_curr_match->cp_next; match != NULL
+		&& !is_first_match(match); match = match->cp_next)
+	    if (match->cp_number != -1)
+	    {
+		number = match->cp_number;
+		break;
+	    }
+	if (match != NULL)
+	    // go down and assign all numbers which are not
+	    // assigned yet
+	    for (match = match->cp_prev; match
+		    && match->cp_number == -1;
+					   match = match->cp_prev)
+		match->cp_number = ++number;
+    }
+}
+
+/*
+ * Get complete information
+ */
+    static void
+get_complete_info(list_T *what_list, dict_T *retdict)
+{
+    int		ret = OK;
+    listitem_T	*item;
+#define CI_WHAT_MODE		0x01
+#define CI_WHAT_PUM_VISIBLE	0x02
+#define CI_WHAT_ITEMS		0x04
+#define CI_WHAT_SELECTED	0x08
+#define CI_WHAT_INSERTED	0x10
+#define CI_WHAT_ALL		0xff
+    int		what_flag;
+
+    if (what_list == NULL)
+	what_flag = CI_WHAT_ALL;
+    else
+    {
+	what_flag = 0;
+	CHECK_LIST_MATERIALIZE(what_list);
+	FOR_ALL_LIST_ITEMS(what_list, item)
+	{
+	    char_u *what = tv_get_string(&item->li_tv);
+
+	    if (STRCMP(what, "mode") == 0)
+		what_flag |= CI_WHAT_MODE;
+	    else if (STRCMP(what, "pum_visible") == 0)
+		what_flag |= CI_WHAT_PUM_VISIBLE;
+	    else if (STRCMP(what, "items") == 0)
+		what_flag |= CI_WHAT_ITEMS;
+	    else if (STRCMP(what, "selected") == 0)
+		what_flag |= CI_WHAT_SELECTED;
+	    else if (STRCMP(what, "inserted") == 0)
+		what_flag |= CI_WHAT_INSERTED;
+	}
+    }
+
+    if (ret == OK && (what_flag & CI_WHAT_MODE))
+	ret = dict_add_string(retdict, "mode", ins_compl_mode());
+
+    if (ret == OK && (what_flag & CI_WHAT_PUM_VISIBLE))
+	ret = dict_add_number(retdict, "pum_visible", pum_visible());
+
+    if (ret == OK && (what_flag & CI_WHAT_ITEMS))
+    {
+	list_T	    *li;
+	dict_T	    *di;
+	compl_T     *match;
+
+	li = list_alloc();
+	if (li == NULL)
+	    return;
+	ret = dict_add_list(retdict, "items", li);
+	if (ret == OK && compl_first_match != NULL)
+	{
+	    match = compl_first_match;
+	    do
+	    {
+		if (!match_at_original_text(match))
+		{
+		    di = dict_alloc();
+		    if (di == NULL)
+			return;
+		    ret = list_append_dict(li, di);
+		    if (ret != OK)
+			return;
+		    dict_add_string(di, "word", match->cp_str);
+		    dict_add_string(di, "abbr", match->cp_text[CPT_ABBR]);
+		    dict_add_string(di, "menu", match->cp_text[CPT_MENU]);
+		    dict_add_string(di, "kind", match->cp_text[CPT_KIND]);
+		    dict_add_string(di, "info", match->cp_text[CPT_INFO]);
+		    if (match->cp_user_data.v_type == VAR_UNKNOWN)
+			// Add an empty string for backwards compatibility
+			dict_add_string(di, "user_data", (char_u *)"");
+		    else
+			dict_add_tv(di, "user_data", &match->cp_user_data);
+		}
+		match = match->cp_next;
+	    }
+	    while (match != NULL && !is_first_match(match));
+	}
+    }
+
+    if (ret == OK && (what_flag & CI_WHAT_SELECTED))
+    {
+	if (compl_curr_match != NULL && compl_curr_match->cp_number == -1)
+	    ins_compl_update_sequence_numbers();
+	ret = dict_add_number(retdict, "selected", compl_curr_match != NULL
+				      ? compl_curr_match->cp_number - 1 : -1);
+    }
+
+    if (ret == OK && (what_flag & CI_WHAT_INSERTED))
+    {
+	// TODO
+    }
+}
+
+/*
+ * "complete_info()" function
+ */
+    void
+f_complete_info(typval_T *argvars, typval_T *rettv)
+{
+    list_T	*what_list = NULL;
+
+    if (rettv_dict_alloc(rettv) == FAIL)
+	return;
+
+    if (in_vim9script() && check_for_opt_list_arg(argvars, 0) == FAIL)
+	return;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	if (check_for_list_arg(argvars, 0) == FAIL)
+	    return;
+	what_list = argvars[0].vval.v_list;
+    }
+    get_complete_info(what_list, rettv->vval.v_dict);
+}
+#endif
+
+/*
+ * Returns TRUE when using a user-defined function for thesaurus completion.
+ */
+    static int
+thesaurus_func_complete(int type UNUSED)
+{
+#ifdef FEAT_COMPL_FUNC
+    return type == CTRL_X_THESAURUS
+		&& (*curbuf->b_p_tsrfu != NUL || *p_tsrfu != NUL);
+#else
+    return FALSE;
+#endif
+}
+
+/*
+ * Return value of process_next_cpt_value()
+ */
+enum
+{
+    INS_COMPL_CPT_OK = 1,
+    INS_COMPL_CPT_CONT,
+    INS_COMPL_CPT_END
+};
+
+/*
+ * state information used for getting the next set of insert completion
+ * matches.
+ */
+typedef struct
+{
+    char_u	*e_cpt_copy;		// copy of 'complete'
+    char_u	*e_cpt;			// current entry in "e_cpt_copy"
+    buf_T	*ins_buf;		// buffer being scanned
+    pos_T	*cur_match_pos;		// current match position
+    pos_T	prev_match_pos;		// previous match position
+    int		set_match_pos;		// save first_match_pos/last_match_pos
+    pos_T	first_match_pos;	// first match position
+    pos_T	last_match_pos;		// last match position
+    int		found_all;		// found all matches of a certain type.
+    char_u	*dict;			// dictionary file to search
+    int		dict_f;			// "dict" is an exact file name or not
+} ins_compl_next_state_T;
+
+/*
+ * Process the next 'complete' option value in st->e_cpt.
+ *
+ * If successful, the arguments are set as below:
+ *   st->cpt - pointer to the next option value in "st->cpt"
+ *   compl_type_arg - type of insert mode completion to use
+ *   st->found_all - all matches of this type are found
+ *   st->ins_buf - search for completions in this buffer
+ *   st->first_match_pos - position of the first completion match
+ *   st->last_match_pos - position of the last completion match
+ *   st->set_match_pos - TRUE if the first match position should be saved to
+ *			    avoid loops after the search wraps around.
+ *   st->dict - name of the dictionary or thesaurus file to search
+ *   st->dict_f - flag specifying whether "dict" is an exact file name or not
+ *
+ * Returns INS_COMPL_CPT_OK if the next value is processed successfully.
+ * Returns INS_COMPL_CPT_CONT to skip the current completion source matching
+ * the "st->e_cpt" option value and process the next matching source.
+ * Returns INS_COMPL_CPT_END if all the values in "st->e_cpt" are processed.
+ */
+    static int
+process_next_cpt_value(
+	ins_compl_next_state_T *st,
+	int		*compl_type_arg,
+	pos_T		*start_match_pos)
+{
+    int	    compl_type = -1;
+    int	    status = INS_COMPL_CPT_OK;
+
+    st->found_all = FALSE;
+
+    while (*st->e_cpt == ',' || *st->e_cpt == ' ')
+	st->e_cpt++;
+
+    if (*st->e_cpt == '.' && !curbuf->b_scanned)
+    {
+	st->ins_buf = curbuf;
+	st->first_match_pos = *start_match_pos;
+	// Move the cursor back one character so that ^N can match the
+	// word immediately after the cursor.
+	if (ctrl_x_mode_normal() && dec(&st->first_match_pos) < 0)
+	{
+	    // Move the cursor to after the last character in the
+	    // buffer, so that word at start of buffer is found
+	    // correctly.
+	    st->first_match_pos.lnum = st->ins_buf->b_ml.ml_line_count;
+	    st->first_match_pos.col =
+		(colnr_T)STRLEN(ml_get(st->first_match_pos.lnum));
+	}
+	st->last_match_pos = st->first_match_pos;
+	compl_type = 0;
+
+	// Remember the first match so that the loop stops when we
+	// wrap and come back there a second time.
+	st->set_match_pos = TRUE;
+    }
+    else if (vim_strchr((char_u *)"buwU", *st->e_cpt) != NULL
+	    && (st->ins_buf = ins_compl_next_buf(
+					   st->ins_buf, *st->e_cpt)) != curbuf)
+    {
+	// Scan a buffer, but not the current one.
+	if (st->ins_buf->b_ml.ml_mfp != NULL)   // loaded buffer
+	{
+	    compl_started = TRUE;
+	    st->first_match_pos.col = st->last_match_pos.col = 0;
+	    st->first_match_pos.lnum = st->ins_buf->b_ml.ml_line_count + 1;
+	    st->last_match_pos.lnum = 0;
+	    compl_type = 0;
+	}
+	else	// unloaded buffer, scan like dictionary
+	{
+	    st->found_all = TRUE;
+	    if (st->ins_buf->b_fname == NULL)
+	    {
+		status = INS_COMPL_CPT_CONT;
+		goto done;
+	    }
+	    compl_type = CTRL_X_DICTIONARY;
+	    st->dict = st->ins_buf->b_fname;
+	    st->dict_f = DICT_EXACT;
+	}
+	if (!shortmess(SHM_COMPLETIONSCAN))
+	{
+	    msg_hist_off = TRUE;	// reset in msg_trunc_attr()
+	    vim_snprintf((char *)IObuff, IOSIZE, _("Scanning: %s"),
+		    st->ins_buf->b_fname == NULL
+			? buf_spname(st->ins_buf)
+			: st->ins_buf->b_sfname == NULL
+			    ? st->ins_buf->b_fname
+			    : st->ins_buf->b_sfname);
+	    (void)msg_trunc_attr((char *)IObuff, TRUE, HL_ATTR(HLF_R));
+	}
+    }
+    else if (*st->e_cpt == NUL)
+	status = INS_COMPL_CPT_END;
+    else
+    {
+	if (ctrl_x_mode_line_or_eval())
+	    compl_type = -1;
+	else if (*st->e_cpt == 'k' || *st->e_cpt == 's')
+	{
+	    if (*st->e_cpt == 'k')
+		compl_type = CTRL_X_DICTIONARY;
+	    else
+		compl_type = CTRL_X_THESAURUS;
+	    if (*++st->e_cpt != ',' && *st->e_cpt != NUL)
+	    {
+		st->dict = st->e_cpt;
+		st->dict_f = DICT_FIRST;
+	    }
+	}
+#ifdef FEAT_FIND_ID
+	else if (*st->e_cpt == 'i')
+	    compl_type = CTRL_X_PATH_PATTERNS;
+	else if (*st->e_cpt == 'd')
+	    compl_type = CTRL_X_PATH_DEFINES;
+#endif
+	else if (*st->e_cpt == ']' || *st->e_cpt == 't')
+	{
+	    compl_type = CTRL_X_TAGS;
+	    if (!shortmess(SHM_COMPLETIONSCAN))
+	    {
+		msg_hist_off = TRUE;	// reset in msg_trunc_attr()
+		vim_snprintf((char *)IObuff, IOSIZE, _("Scanning tags."));
+		(void)msg_trunc_attr((char *)IObuff, TRUE, HL_ATTR(HLF_R));
+	    }
+	}
+	else
+	    compl_type = -1;
+
+	// in any case e_cpt is advanced to the next entry
+	(void)copy_option_part(&st->e_cpt, IObuff, IOSIZE, ",");
+
+	st->found_all = TRUE;
+	if (compl_type == -1)
+	    status = INS_COMPL_CPT_CONT;
+    }
+
+done:
+    *compl_type_arg = compl_type;
+    return status;
+}
+
+#ifdef FEAT_FIND_ID
+/*
+ * Get the next set of identifiers or defines matching "compl_pattern" in
+ * included files.
+ */
+    static void
+get_next_include_file_completion(int compl_type)
+{
+    find_pattern_in_path(compl_pattern, compl_direction,
+	    (int)STRLEN(compl_pattern), FALSE, FALSE,
+	    (compl_type == CTRL_X_PATH_DEFINES
+	     && !(compl_cont_status & CONT_SOL))
+	    ? FIND_DEFINE : FIND_ANY, 1L, ACTION_EXPAND,
+	    (linenr_T)1, (linenr_T)MAXLNUM);
+}
+#endif
+
+/*
+ * Get the next set of words matching "compl_pattern" in dictionary or
+ * thesaurus files.
+ */
+    static void
+get_next_dict_tsr_completion(int compl_type, char_u *dict, int dict_f)
+{
+#ifdef FEAT_COMPL_FUNC
+    if (thesaurus_func_complete(compl_type))
+	expand_by_function(compl_type, compl_pattern);
+    else
+#endif
+	ins_compl_dictionaries(
+		dict != NULL ? dict
+		: (compl_type == CTRL_X_THESAURUS
+		    ? (*curbuf->b_p_tsr == NUL ? p_tsr : curbuf->b_p_tsr)
+		    : (*curbuf->b_p_dict == NUL ? p_dict : curbuf->b_p_dict)),
+		compl_pattern,
+		dict != NULL ? dict_f : 0,
+		compl_type == CTRL_X_THESAURUS);
+}
+
+/*
+ * Get the next set of tag names matching "compl_pattern".
+ */
+    static void
+get_next_tag_completion(void)
+{
+    int		save_p_ic;
+    char_u	**matches;
+    int		num_matches;
+
+    // set p_ic according to p_ic, p_scs and pat for find_tags().
+    save_p_ic = p_ic;
+    p_ic = ignorecase(compl_pattern);
+
+    // Find up to TAG_MANY matches.  Avoids that an enormous number
+    // of matches is found when compl_pattern is empty
+    g_tag_at_cursor = TRUE;
+    if (find_tags(compl_pattern, &num_matches, &matches,
+		TAG_REGEXP | TAG_NAMES | TAG_NOIC | TAG_INS_COMP
+		| (ctrl_x_mode_not_default() ? TAG_VERBOSE : 0),
+		TAG_MANY, curbuf->b_ffname) == OK && num_matches > 0)
+	ins_compl_add_matches(num_matches, matches, p_ic);
+    g_tag_at_cursor = FALSE;
+    p_ic = save_p_ic;
+}
+
+/*
+ * Get the next set of filename matching "compl_pattern".
+ */
+    static void
+get_next_filename_completion(void)
+{
+    char_u	**matches;
+    int		num_matches;
+
+    if (expand_wildcards(1, &compl_pattern, &num_matches, &matches,
+		EW_FILE|EW_DIR|EW_ADDSLASH|EW_SILENT) != OK)
+	return;
+
+    // May change home directory back to "~".
+    tilde_replace(compl_pattern, num_matches, matches);
+#ifdef BACKSLASH_IN_FILENAME
+    if (curbuf->b_p_csl[0] != NUL)
+    {
+	int	    i;
+
+	for (i = 0; i < num_matches; ++i)
+	{
+	    char_u	*ptr = matches[i];
+
+	    while (*ptr != NUL)
+	    {
+		if (curbuf->b_p_csl[0] == 's' && *ptr == '\\')
+		    *ptr = '/';
+		else if (curbuf->b_p_csl[0] == 'b' && *ptr == '/')
+		    *ptr = '\\';
+		ptr += (*mb_ptr2len)(ptr);
+	    }
+	}
+    }
+#endif
+    ins_compl_add_matches(num_matches, matches, p_fic || p_wic);
+}
+
+/*
+ * Get the next set of command-line completions matching "compl_pattern".
+ */
+    static void
+get_next_cmdline_completion(void)
+{
+    char_u	**matches;
+    int		num_matches;
+
+    if (expand_cmdline(&compl_xp, compl_pattern,
+		(int)STRLEN(compl_pattern),
+		&num_matches, &matches) == EXPAND_OK)
+	ins_compl_add_matches(num_matches, matches, FALSE);
+}
+
+/*
+ * Get the next set of spell suggestions matching "compl_pattern".
+ */
+    static void
+get_next_spell_completion(linenr_T lnum UNUSED)
+{
+#ifdef FEAT_SPELL
+    char_u	**matches;
+    int		num_matches;
+
+    num_matches = expand_spelling(lnum, compl_pattern, &matches);
+    if (num_matches > 0)
+	ins_compl_add_matches(num_matches, matches, p_ic);
+    else
+	vim_free(matches);
+#endif
+}
+
+/*
+ * Return the next word or line from buffer "ins_buf" at position
+ * "cur_match_pos" for completion.  The length of the match is set in "len".
+ */
+    static char_u *
+ins_compl_get_next_word_or_line(
+	buf_T	*ins_buf,		// buffer being scanned
+	pos_T	*cur_match_pos,		// current match position
+	int	*match_len,
+	int	*cont_s_ipos)		// next ^X<> will set initial_pos
+{
+    char_u	*ptr;
+    int		len;
+
+    *match_len = 0;
+    ptr = ml_get_buf(ins_buf, cur_match_pos->lnum, FALSE) +
+	cur_match_pos->col;
+    if (ctrl_x_mode_line_or_eval())
+    {
+	if (compl_status_adding())
+	{
+	    if (cur_match_pos->lnum >= ins_buf->b_ml.ml_line_count)
+		return NULL;
+	    ptr = ml_get_buf(ins_buf, cur_match_pos->lnum + 1, FALSE);
+	    if (!p_paste)
+		ptr = skipwhite(ptr);
+	}
+	len = (int)STRLEN(ptr);
+    }
+    else
+    {
+	char_u	*tmp_ptr = ptr;
+
+	if (compl_status_adding() && compl_length <= (int)STRLEN(tmp_ptr))
+	{
+	    tmp_ptr += compl_length;
+	    // Skip if already inside a word.
+	    if (vim_iswordp(tmp_ptr))
+		return NULL;
+	    // Find start of next word.
+	    tmp_ptr = find_word_start(tmp_ptr);
+	}
+	// Find end of this word.
+	tmp_ptr = find_word_end(tmp_ptr);
+	len = (int)(tmp_ptr - ptr);
+
+	if (compl_status_adding() && len == compl_length)
+	{
+	    if (cur_match_pos->lnum < ins_buf->b_ml.ml_line_count)
+	    {
+		// Try next line, if any. the new word will be
+		// "join" as if the normal command "J" was used.
+		// IOSIZE is always greater than
+		// compl_length, so the next STRNCPY always
+		// works -- Acevedo
+		STRNCPY(IObuff, ptr, len);
+		ptr = ml_get_buf(ins_buf, cur_match_pos->lnum + 1, FALSE);
+		tmp_ptr = ptr = skipwhite(ptr);
+		// Find start of next word.
+		tmp_ptr = find_word_start(tmp_ptr);
+		// Find end of next word.
+		tmp_ptr = find_word_end(tmp_ptr);
+		if (tmp_ptr > ptr)
+		{
+		    if (*ptr != ')' && IObuff[len - 1] != TAB)
+		    {
+			if (IObuff[len - 1] != ' ')
+			    IObuff[len++] = ' ';
+			// IObuf =~ "\k.* ", thus len >= 2
+			if (p_js
+				&& (IObuff[len - 2] == '.'
+				    || (vim_strchr(p_cpo, CPO_JOINSP)
+					== NULL
+					&& (IObuff[len - 2] == '?'
+					    || IObuff[len - 2] == '!'))))
+			    IObuff[len++] = ' ';
+		    }
+		    // copy as much as possible of the new word
+		    if (tmp_ptr - ptr >= IOSIZE - len)
+			tmp_ptr = ptr + IOSIZE - len - 1;
+		    STRNCPY(IObuff + len, ptr, tmp_ptr - ptr);
+		    len += (int)(tmp_ptr - ptr);
+		    *cont_s_ipos = TRUE;
+		}
+		IObuff[len] = NUL;
+		ptr = IObuff;
+	    }
+	    if (len == compl_length)
+		return NULL;
+	}
+    }
+
+    *match_len = len;
+    return ptr;
+}
+
+/*
+ * Get the next set of words matching "compl_pattern" for default completion(s)
+ * (normal ^P/^N and ^X^L).
+ * Search for "compl_pattern" in the buffer "st->ins_buf" starting from the
+ * position "st->start_pos" in the "compl_direction" direction. If
+ * "st->set_match_pos" is TRUE, then set the "st->first_match_pos" and
+ * "st->last_match_pos".
+ * Returns OK if a new next match is found, otherwise returns FAIL.
+ */
+    static int
+get_next_default_completion(ins_compl_next_state_T *st, pos_T *start_pos)
+{
+    int		found_new_match = FAIL;
+    int		save_p_scs;
+    int		save_p_ws;
+    int		looped_around = FALSE;
+    char_u	*ptr;
+    int		len;
+
+    // If 'infercase' is set, don't use 'smartcase' here
+    save_p_scs = p_scs;
+    if (st->ins_buf->b_p_inf)
+	p_scs = FALSE;
+
+    //	Buffers other than curbuf are scanned from the beginning or the
+    //	end but never from the middle, thus setting nowrapscan in this
+    //	buffer is a good idea, on the other hand, we always set
+    //	wrapscan for curbuf to avoid missing matches -- Acevedo,Webb
+    save_p_ws = p_ws;
+    if (st->ins_buf != curbuf)
+	p_ws = FALSE;
+    else if (*st->e_cpt == '.')
+	p_ws = TRUE;
+    looped_around = FALSE;
+    for (;;)
+    {
+	int	cont_s_ipos = FALSE;
+
+	++msg_silent;  // Don't want messages for wrapscan.
+
+	// ctrl_x_mode_line_or_eval() || word-wise search that
+	// has added a word that was at the beginning of the line
+	if (ctrl_x_mode_line_or_eval() || (compl_cont_status & CONT_SOL))
+	    found_new_match = search_for_exact_line(st->ins_buf,
+			    st->cur_match_pos, compl_direction, compl_pattern);
+	else
+	    found_new_match = searchit(NULL, st->ins_buf, st->cur_match_pos,
+				NULL, compl_direction, compl_pattern, 1L,
+				SEARCH_KEEP + SEARCH_NFMSG, RE_LAST, NULL);
+	--msg_silent;
+	if (!compl_started || st->set_match_pos)
+	{
+	    // set "compl_started" even on fail
+	    compl_started = TRUE;
+	    st->first_match_pos = *st->cur_match_pos;
+	    st->last_match_pos = *st->cur_match_pos;
+	    st->set_match_pos = FALSE;
+	}
+	else if (st->first_match_pos.lnum == st->last_match_pos.lnum
+		&& st->first_match_pos.col == st->last_match_pos.col)
+	{
+	    found_new_match = FAIL;
+	}
+	else if (compl_dir_forward()
+		&& (st->prev_match_pos.lnum > st->cur_match_pos->lnum
+		    || (st->prev_match_pos.lnum == st->cur_match_pos->lnum
+			&& st->prev_match_pos.col >= st->cur_match_pos->col)))
+	{
+	    if (looped_around)
+		found_new_match = FAIL;
+	    else
+		looped_around = TRUE;
+	}
+	else if (!compl_dir_forward()
+		&& (st->prev_match_pos.lnum < st->cur_match_pos->lnum
+		    || (st->prev_match_pos.lnum == st->cur_match_pos->lnum
+			&& st->prev_match_pos.col <= st->cur_match_pos->col)))
+	{
+	    if (looped_around)
+		found_new_match = FAIL;
+	    else
+		looped_around = TRUE;
+	}
+	st->prev_match_pos = *st->cur_match_pos;
+	if (found_new_match == FAIL)
+	    break;
+
+	// when ADDING, the text before the cursor matches, skip it
+	if (compl_status_adding() && st->ins_buf == curbuf
+		&& start_pos->lnum == st->cur_match_pos->lnum
+		&& start_pos->col  == st->cur_match_pos->col)
+	    continue;
+
+	ptr = ins_compl_get_next_word_or_line(st->ins_buf, st->cur_match_pos,
+							   &len, &cont_s_ipos);
+	if (ptr == NULL)
+	    continue;
+
+	if (ins_compl_add_infercase(ptr, len, p_ic,
+		    st->ins_buf == curbuf ? NULL : st->ins_buf->b_sfname,
+		    0, cont_s_ipos) != NOTDONE)
+	{
+	    found_new_match = OK;
+	    break;
+	}
+    }
+    p_scs = save_p_scs;
+    p_ws = save_p_ws;
+
+    return found_new_match;
+}
+
+/*
+ * get the next set of completion matches for "type".
+ * Returns TRUE if a new match is found. Otherwise returns FALSE.
+ */
+    static int
+get_next_completion_match(int type, ins_compl_next_state_T *st, pos_T *ini)
+{
+    int	found_new_match = FALSE;
+
+    switch (type)
+    {
+	case -1:
+	    break;
+#ifdef FEAT_FIND_ID
+	case CTRL_X_PATH_PATTERNS:
+	case CTRL_X_PATH_DEFINES:
+	    get_next_include_file_completion(type);
+	    break;
+#endif
+
+	case CTRL_X_DICTIONARY:
+	case CTRL_X_THESAURUS:
+	    get_next_dict_tsr_completion(type, st->dict, st->dict_f);
+	    st->dict = NULL;
+	    break;
+
+	case CTRL_X_TAGS:
+	    get_next_tag_completion();
+	    break;
+
+	case CTRL_X_FILES:
+	    get_next_filename_completion();
+	    break;
+
+	case CTRL_X_CMDLINE:
+	case CTRL_X_CMDLINE_CTRL_X:
+	    get_next_cmdline_completion();
+	    break;
+
+#ifdef FEAT_COMPL_FUNC
+	case CTRL_X_FUNCTION:
+	case CTRL_X_OMNI:
+	    expand_by_function(type, compl_pattern);
+	    break;
+#endif
+
+	case CTRL_X_SPELL:
+	    get_next_spell_completion(st->first_match_pos.lnum);
+	    break;
+
+	default:	// normal ^P/^N and ^X^L
+	    found_new_match = get_next_default_completion(st, ini);
+	    if (found_new_match == FAIL && st->ins_buf == curbuf)
+		st->found_all = TRUE;
+    }
+
+    // check if compl_curr_match has changed, (e.g. other type of
+    // expansion added something)
+    if (type != 0 && compl_curr_match != compl_old_match)
+	found_new_match = OK;
+
+    return found_new_match;
+}
+
+/*
+ * Get the next expansion(s), using "compl_pattern".
+ * The search starts at position "ini" in curbuf and in the direction
+ * compl_direction.
+ * When "compl_started" is FALSE start at that position, otherwise continue
+ * where we stopped searching before.
+ * This may return before finding all the matches.
+ * Return the total number of matches or -1 if still unknown -- Acevedo
+ */
+    static int
+ins_compl_get_exp(pos_T *ini)
+{
+    static ins_compl_next_state_T   st;
+    static int			    st_cleared = FALSE;
+    int		i;
+    int		found_new_match;
+    int		type = ctrl_x_mode;
+
+    if (!compl_started)
+    {
+	buf_T *buf;
+
+	FOR_ALL_BUFFERS(buf)
+	    buf->b_scanned = 0;
+	if (!st_cleared)
+	{
+	    CLEAR_FIELD(st);
+	    st_cleared = TRUE;
+	}
+	st.found_all = FALSE;
+	st.ins_buf = curbuf;
+	vim_free(st.e_cpt_copy);
+	// Make a copy of 'complete', if case the buffer is wiped out.
+	st.e_cpt_copy = vim_strsave((compl_cont_status & CONT_LOCAL)
+					    ? (char_u *)"." : curbuf->b_p_cpt);
+	st.e_cpt = st.e_cpt_copy == NULL ? (char_u *)"" : st.e_cpt_copy;
+	st.last_match_pos = st.first_match_pos = *ini;
+    }
+    else if (st.ins_buf != curbuf && !buf_valid(st.ins_buf))
+	st.ins_buf = curbuf;  // In case the buffer was wiped out.
+
+    compl_old_match = compl_curr_match;	// remember the last current match
+    st.cur_match_pos = (compl_dir_forward())
+				? &st.last_match_pos : &st.first_match_pos;
+
+    // For ^N/^P loop over all the flags/windows/buffers in 'complete'.
+    for (;;)
+    {
+	found_new_match = FAIL;
+	st.set_match_pos = FALSE;
+
+	// For ^N/^P pick a new entry from e_cpt if compl_started is off,
+	// or if found_all says this entry is done.  For ^X^L only use the
+	// entries from 'complete' that look in loaded buffers.
+	if ((ctrl_x_mode_normal() || ctrl_x_mode_line_or_eval())
+					&& (!compl_started || st.found_all))
+	{
+	    int status = process_next_cpt_value(&st, &type, ini);
+
+	    if (status == INS_COMPL_CPT_END)
+		break;
+	    if (status == INS_COMPL_CPT_CONT)
+		continue;
+	}
+
+	// If complete() was called then compl_pattern has been reset.  The
+	// following won't work then, bail out.
+	if (compl_pattern == NULL)
+	    break;
+
+	// get the next set of completion matches
+	found_new_match = get_next_completion_match(type, &st, ini);
+
+	// break the loop for specialized modes (use 'complete' just for the
+	// generic ctrl_x_mode == CTRL_X_NORMAL) or when we've found a new
+	// match
+	if ((ctrl_x_mode_not_default() && !ctrl_x_mode_line_or_eval())
+						|| found_new_match != FAIL)
+	{
+	    if (got_int)
+		break;
+	    // Fill the popup menu as soon as possible.
+	    if (type != -1)
+		ins_compl_check_keys(0, FALSE);
+
+	    if ((ctrl_x_mode_not_default()
+			&& !ctrl_x_mode_line_or_eval()) || compl_interrupted)
+		break;
+	    compl_started = TRUE;
+	}
+	else
+	{
+	    // Mark a buffer scanned when it has been scanned completely
+	    if (type == 0 || type == CTRL_X_PATH_PATTERNS)
+		st.ins_buf->b_scanned = TRUE;
+
+	    compl_started = FALSE;
+	}
+    }
+    compl_started = TRUE;
+
+    if ((ctrl_x_mode_normal() || ctrl_x_mode_line_or_eval())
+	    && *st.e_cpt == NUL)		// Got to end of 'complete'
+	found_new_match = FAIL;
+
+    i = -1;		// total of matches, unknown
+    if (found_new_match == FAIL || (ctrl_x_mode_not_default()
+					       && !ctrl_x_mode_line_or_eval()))
+	i = ins_compl_make_cyclic();
+
+    if (compl_old_match != NULL)
+    {
+	// If several matches were added (FORWARD) or the search failed and has
+	// just been made cyclic then we have to move compl_curr_match to the
+	// next or previous entry (if any) -- Acevedo
+	compl_curr_match = compl_dir_forward() ? compl_old_match->cp_next
+						    : compl_old_match->cp_prev;
+	if (compl_curr_match == NULL)
+	    compl_curr_match = compl_old_match;
+    }
+    may_trigger_modechanged();
+
+    return i;
+}
+
+/*
+ * Update "compl_shown_match" to the actually shown match, it may differ when
+ * "compl_leader" is used to omit some of the matches.
+ */
+    static void
+ins_compl_update_shown_match(void)
+{
+    while (!ins_compl_equal(compl_shown_match,
+		compl_leader, (int)STRLEN(compl_leader))
+	    && compl_shown_match->cp_next != NULL
+	    && !is_first_match(compl_shown_match->cp_next))
+	compl_shown_match = compl_shown_match->cp_next;
+
+    // If we didn't find it searching forward, and compl_shows_dir is
+    // backward, find the last match.
+    if (compl_shows_dir_backward()
+	    && !ins_compl_equal(compl_shown_match,
+		compl_leader, (int)STRLEN(compl_leader))
+	    && (compl_shown_match->cp_next == NULL
+		|| is_first_match(compl_shown_match->cp_next)))
+    {
+	while (!ins_compl_equal(compl_shown_match,
+		    compl_leader, (int)STRLEN(compl_leader))
+		&& compl_shown_match->cp_prev != NULL
+		&& !is_first_match(compl_shown_match->cp_prev))
+	    compl_shown_match = compl_shown_match->cp_prev;
+    }
+}
+
+/*
+ * Delete the old text being completed.
+ */
+    void
+ins_compl_delete(void)
+{
+    int	    col;
+
+    // In insert mode: Delete the typed part.
+    // In replace mode: Put the old characters back, if any.
+    col = compl_col + (compl_status_adding() ? compl_length : 0);
+    if ((int)curwin->w_cursor.col > col)
+    {
+	if (stop_arrow() == FAIL)
+	    return;
+	backspace_until_column(col);
+    }
+
+    // TODO: is this sufficient for redrawing?  Redrawing everything causes
+    // flicker, thus we can't do that.
+    changed_cline_bef_curs();
+#ifdef FEAT_EVAL
+    // clear v:completed_item
+    set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc_lock(VAR_FIXED));
+#endif
+}
+
+/*
+ * Insert the new text being completed.
+ * "in_compl_func" is TRUE when called from complete_check().
+ */
+    void
+ins_compl_insert(int in_compl_func)
+{
+    int compl_len = get_compl_len();
+
+    // Make sure we don't go over the end of the string, this can happen with
+    // illegal bytes.
+    if (compl_len < (int)STRLEN(compl_shown_match->cp_str))
+	ins_bytes(compl_shown_match->cp_str + compl_len);
+    if (match_at_original_text(compl_shown_match))
+	compl_used_match = FALSE;
+    else
+	compl_used_match = TRUE;
+#ifdef FEAT_EVAL
+    {
+	dict_T *dict = ins_compl_dict_alloc(compl_shown_match);
+
+	set_vim_var_dict(VV_COMPLETED_ITEM, dict);
+    }
+#endif
+    if (!in_compl_func)
+	compl_curr_match = compl_shown_match;
+}
+
+/*
+ * show the file name for the completion match (if any).  Truncate the file
+ * name to avoid a wait for return.
+ */
+    static void
+ins_compl_show_filename(void)
+{
+    char	*lead = _("match in file");
+    int		space = sc_col - vim_strsize((char_u *)lead) - 2;
+    char_u	*s;
+    char_u	*e;
+
+    if (space <= 0)
+	return;
+
+    // We need the tail that fits.  With double-byte encoding going
+    // back from the end is very slow, thus go from the start and keep
+    // the text that fits in "space" between "s" and "e".
+    for (s = e = compl_shown_match->cp_fname; *e != NUL; MB_PTR_ADV(e))
+    {
+	space -= ptr2cells(e);
+	while (space < 0)
+	{
+	    space += ptr2cells(s);
+	    MB_PTR_ADV(s);
+	}
+    }
+    msg_hist_off = TRUE;
+    vim_snprintf((char *)IObuff, IOSIZE, "%s %s%s", lead,
+	    s > compl_shown_match->cp_fname ? "<" : "", s);
+    msg((char *)IObuff);
+    msg_hist_off = FALSE;
+    redraw_cmdline = FALSE;	    // don't overwrite!
+}
+
+/*
+ * Find the next set of matches for completion. Repeat the completion "todo"
+ * times.  The number of matches found is returned in 'num_matches'.
+ *
+ * If "allow_get_expansion" is TRUE, then ins_compl_get_exp() may be called to
+ * get more completions. If it is FALSE, then do nothing when there are no more
+ * completions in the given direction.
+ *
+ * If "advance" is TRUE, then completion will move to the first match.
+ * Otherwise, the original text will be shown.
+ *
+ * Returns OK on success and -1 if the number of matches are unknown.
+ */
+    static int
+find_next_completion_match(
+	int	allow_get_expansion,
+	int	todo,		// repeat completion this many times
+	int	advance,
+	int	*num_matches)
+{
+    int	    found_end = FALSE;
+    compl_T *found_compl = NULL;
+
+    while (--todo >= 0)
+    {
+	if (compl_shows_dir_forward() && compl_shown_match->cp_next != NULL)
+	{
+	    compl_shown_match = compl_shown_match->cp_next;
+	    found_end = (compl_first_match != NULL
+		    && (is_first_match(compl_shown_match->cp_next)
+			|| is_first_match(compl_shown_match)));
+	}
+	else if (compl_shows_dir_backward()
+		&& compl_shown_match->cp_prev != NULL)
+	{
+	    found_end = is_first_match(compl_shown_match);
+	    compl_shown_match = compl_shown_match->cp_prev;
+	    found_end |= is_first_match(compl_shown_match);
+	}
+	else
+	{
+	    if (!allow_get_expansion)
+	    {
+		if (advance)
+		{
+		    if (compl_shows_dir_backward())
+			compl_pending -= todo + 1;
+		    else
+			compl_pending += todo + 1;
+		}
+		return -1;
+	    }
+
+	    if (!compl_no_select && advance)
+	    {
+		if (compl_shows_dir_backward())
+		    --compl_pending;
+		else
+		    ++compl_pending;
+	    }
+
+	    // Find matches.
+	    *num_matches = ins_compl_get_exp(&compl_startpos);
+
+	    // handle any pending completions
+	    while (compl_pending != 0 && compl_direction == compl_shows_dir
+		    && advance)
+	    {
+		if (compl_pending > 0 && compl_shown_match->cp_next != NULL)
+		{
+		    compl_shown_match = compl_shown_match->cp_next;
+		    --compl_pending;
+		}
+		if (compl_pending < 0 && compl_shown_match->cp_prev != NULL)
+		{
+		    compl_shown_match = compl_shown_match->cp_prev;
+		    ++compl_pending;
+		}
+		else
+		    break;
+	    }
+	    found_end = FALSE;
+	}
+	if (!match_at_original_text(compl_shown_match)
+		&& compl_leader != NULL
+		&& !ins_compl_equal(compl_shown_match,
+		    compl_leader, (int)STRLEN(compl_leader)))
+	    ++todo;
+	else
+	    // Remember a matching item.
+	    found_compl = compl_shown_match;
+
+	// Stop at the end of the list when we found a usable match.
+	if (found_end)
+	{
+	    if (found_compl != NULL)
+	    {
+		compl_shown_match = found_compl;
+		break;
+	    }
+	    todo = 1;	    // use first usable match after wrapping around
+	}
+    }
+
+    return OK;
+}
+
+/*
+ * Fill in the next completion in the current direction.
+ * If "allow_get_expansion" is TRUE, then we may call ins_compl_get_exp() to
+ * get more completions.  If it is FALSE, then we just do nothing when there
+ * are no more completions in a given direction.  The latter case is used when
+ * we are still in the middle of finding completions, to allow browsing
+ * through the ones found so far.
+ * Return the total number of matches, or -1 if still unknown -- webb.
+ *
+ * compl_curr_match is currently being used by ins_compl_get_exp(), so we use
+ * compl_shown_match here.
+ *
+ * Note that this function may be called recursively once only.  First with
+ * "allow_get_expansion" TRUE, which calls ins_compl_get_exp(), which in turn
+ * calls this function with "allow_get_expansion" FALSE.
+ */
+    static int
+ins_compl_next(
+    int	    allow_get_expansion,
+    int	    count,		// repeat completion this many times; should
+				// be at least 1
+    int	    insert_match,	// Insert the newly selected match
+    int	    in_compl_func)	// called from complete_check()
+{
+    int	    num_matches = -1;
+    int	    todo = count;
+    int	    advance;
+    int	    started = compl_started;
+    buf_T   *orig_curbuf = curbuf;
+
+    // When user complete function return -1 for findstart which is next
+    // time of 'always', compl_shown_match become NULL.
+    if (compl_shown_match == NULL)
+	return -1;
+
+    if (compl_leader != NULL && !match_at_original_text(compl_shown_match))
+	// Update "compl_shown_match" to the actually shown match
+	ins_compl_update_shown_match();
+
+    if (allow_get_expansion && insert_match
+	    && (!(compl_get_longest || compl_restarting) || compl_used_match))
+	// Delete old text to be replaced
+	ins_compl_delete();
+
+    // When finding the longest common text we stick at the original text,
+    // don't let CTRL-N or CTRL-P move to the first match.
+    advance = count != 1 || !allow_get_expansion || !compl_get_longest;
+
+    // When restarting the search don't insert the first match either.
+    if (compl_restarting)
+    {
+	advance = FALSE;
+	compl_restarting = FALSE;
+    }
+
+    // Repeat this for when <PageUp> or <PageDown> is typed.  But don't wrap
+    // around.
+    if (find_next_completion_match(allow_get_expansion, todo, advance,
+							&num_matches) == -1)
+	return -1;
+
+    if (curbuf != orig_curbuf)
+    {
+	// In case some completion function switched buffer, don't want to
+	// insert the completion elsewhere.
+	return -1;
+    }
+
+    // Insert the text of the new completion, or the compl_leader.
+    if (compl_no_insert && !started)
+    {
+	ins_bytes(compl_orig_text + get_compl_len());
+	compl_used_match = FALSE;
+    }
+    else if (insert_match)
+    {
+	if (!compl_get_longest || compl_used_match)
+	    ins_compl_insert(in_compl_func);
+	else
+	    ins_bytes(compl_leader + get_compl_len());
+    }
+    else
+	compl_used_match = FALSE;
+
+    if (!allow_get_expansion)
+    {
+	// may undisplay the popup menu first
+	ins_compl_upd_pum();
+
+	if (pum_enough_matches())
+	    // Will display the popup menu, don't redraw yet to avoid flicker.
+	    pum_call_update_screen();
+	else
+	    // Not showing the popup menu yet, redraw to show the user what was
+	    // inserted.
+	    update_screen(0);
+
+	// display the updated popup menu
+	ins_compl_show_pum();
+#ifdef FEAT_GUI
+	if (gui.in_use)
+	{
+	    // Show the cursor after the match, not after the redrawn text.
+	    setcursor();
+	    out_flush_cursor(FALSE, FALSE);
+	}
+#endif
+
+	// Delete old text to be replaced, since we're still searching and
+	// don't want to match ourselves!
+	ins_compl_delete();
+    }
+
+    // Enter will select a match when the match wasn't inserted and the popup
+    // menu is visible.
+    if (compl_no_insert && !started)
+	compl_enter_selects = TRUE;
+    else
+	compl_enter_selects = !insert_match && compl_match_array != NULL;
+
+    // Show the file name for the match (if any)
+    if (compl_shown_match->cp_fname != NULL)
+	ins_compl_show_filename();
+
+    return num_matches;
+}
+
+/*
+ * Call this while finding completions, to check whether the user has hit a key
+ * that should change the currently displayed completion, or exit completion
+ * mode.  Also, when compl_pending is not zero, show a completion as soon as
+ * possible. -- webb
+ * "frequency" specifies out of how many calls we actually check.
+ * "in_compl_func" is TRUE when called from complete_check(), don't set
+ * compl_curr_match.
+ */
+    void
+ins_compl_check_keys(int frequency, int in_compl_func)
+{
+    static int	count = 0;
+    int		c;
+
+    // Don't check when reading keys from a script, :normal or feedkeys().
+    // That would break the test scripts.  But do check for keys when called
+    // from complete_check().
+    if (!in_compl_func && (using_script() || ex_normal_busy))
+	return;
+
+    // Only do this at regular intervals
+    if (++count < frequency)
+	return;
+    count = 0;
+
+    // Check for a typed key.  Do use mappings, otherwise vim_is_ctrl_x_key()
+    // can't do its work correctly.
+    c = vpeekc_any();
+    if (c != NUL)
+    {
+	if (vim_is_ctrl_x_key(c) && c != Ctrl_X && c != Ctrl_R)
+	{
+	    c = safe_vgetc();	// Eat the character
+	    compl_shows_dir = ins_compl_key2dir(c);
+	    (void)ins_compl_next(FALSE, ins_compl_key2count(c),
+				      c != K_UP && c != K_DOWN, in_compl_func);
+	}
+	else
+	{
+	    // Need to get the character to have KeyTyped set.  We'll put it
+	    // back with vungetc() below.  But skip K_IGNORE.
+	    c = safe_vgetc();
+	    if (c != K_IGNORE)
+	    {
+		// Don't interrupt completion when the character wasn't typed,
+		// e.g., when doing @q to replay keys.
+		if (c != Ctrl_R && KeyTyped)
+		    compl_interrupted = TRUE;
+
+		vungetc(c);
+	    }
+	}
+    }
+    if (compl_pending != 0 && !got_int && !compl_no_insert)
+    {
+	int todo = compl_pending > 0 ? compl_pending : -compl_pending;
+
+	compl_pending = 0;
+	(void)ins_compl_next(FALSE, todo, TRUE, in_compl_func);
+    }
+}
+
+/*
+ * Decide the direction of Insert mode complete from the key typed.
+ * Returns BACKWARD or FORWARD.
+ */
+    static int
+ins_compl_key2dir(int c)
+{
+    if (c == Ctrl_P || c == Ctrl_L
+	    || c == K_PAGEUP || c == K_KPAGEUP || c == K_S_UP || c == K_UP)
+	return BACKWARD;
+    return FORWARD;
+}
+
+/*
+ * Return TRUE for keys that are used for completion only when the popup menu
+ * is visible.
+ */
+    static int
+ins_compl_pum_key(int c)
+{
+    return pum_visible() && (c == K_PAGEUP || c == K_KPAGEUP || c == K_S_UP
+		     || c == K_PAGEDOWN || c == K_KPAGEDOWN || c == K_S_DOWN
+		     || c == K_UP || c == K_DOWN);
+}
+
+/*
+ * Decide the number of completions to move forward.
+ * Returns 1 for most keys, height of the popup menu for page-up/down keys.
+ */
+    static int
+ins_compl_key2count(int c)
+{
+    int		h;
+
+    if (ins_compl_pum_key(c) && c != K_UP && c != K_DOWN)
+    {
+	h = pum_get_height();
+	if (h > 3)
+	    h -= 2; // keep some context
+	return h;
+    }
+    return 1;
+}
+
+/*
+ * Return TRUE if completion with "c" should insert the match, FALSE if only
+ * to change the currently selected completion.
+ */
+    static int
+ins_compl_use_match(int c)
+{
+    switch (c)
+    {
+	case K_UP:
+	case K_DOWN:
+	case K_PAGEDOWN:
+	case K_KPAGEDOWN:
+	case K_S_DOWN:
+	case K_PAGEUP:
+	case K_KPAGEUP:
+	case K_S_UP:
+	    return FALSE;
+    }
+    return TRUE;
+}
+
+/*
+ * Get the pattern, column and length for normal completion (CTRL-N CTRL-P
+ * completion)
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ * Uses the global variables: compl_cont_status and ctrl_x_mode
+ */
+    static int
+get_normal_compl_info(char_u *line, int startcol, colnr_T curs_col)
+{
+    if ((compl_cont_status & CONT_SOL) || ctrl_x_mode_path_defines())
+    {
+	if (!compl_status_adding())
+	{
+	    while (--startcol >= 0 && vim_isIDc(line[startcol]))
+		;
+	    compl_col += ++startcol;
+	    compl_length = curs_col - startcol;
+	}
+	if (p_ic)
+	    compl_pattern = str_foldcase(line + compl_col,
+		    compl_length, NULL, 0);
+	else
+	    compl_pattern = vim_strnsave(line + compl_col, compl_length);
+	if (compl_pattern == NULL)
+	    return FAIL;
+    }
+    else if (compl_status_adding())
+    {
+	char_u	    *prefix = (char_u *)"\\<";
+
+	// we need up to 2 extra chars for the prefix
+	compl_pattern = alloc(quote_meta(NULL, line + compl_col,
+		    compl_length) + 2);
+	if (compl_pattern == NULL)
+	    return FAIL;
+	if (!vim_iswordp(line + compl_col)
+		|| (compl_col > 0
+		    && (vim_iswordp(mb_prevptr(line, line + compl_col)))))
+	    prefix = (char_u *)"";
+	STRCPY((char *)compl_pattern, prefix);
+	(void)quote_meta(compl_pattern + STRLEN(prefix),
+		line + compl_col, compl_length);
+    }
+    else if (--startcol < 0
+	    || !vim_iswordp(mb_prevptr(line, line + startcol + 1)))
+    {
+	// Match any word of at least two chars
+	compl_pattern = vim_strsave((char_u *)"\\<\\k\\k");
+	if (compl_pattern == NULL)
+	    return FAIL;
+	compl_col += curs_col;
+	compl_length = 0;
+    }
+    else
+    {
+	// Search the point of change class of multibyte character
+	// or not a word single byte character backward.
+	if (has_mbyte)
+	{
+	    int base_class;
+	    int head_off;
+
+	    startcol -= (*mb_head_off)(line, line + startcol);
+	    base_class = mb_get_class(line + startcol);
+	    while (--startcol >= 0)
+	    {
+		head_off = (*mb_head_off)(line, line + startcol);
+		if (base_class != mb_get_class(line + startcol
+			    - head_off))
+		    break;
+		startcol -= head_off;
+	    }
+	}
+	else
+	    while (--startcol >= 0 && vim_iswordc(line[startcol]))
+		;
+	compl_col += ++startcol;
+	compl_length = (int)curs_col - startcol;
+	if (compl_length == 1)
+	{
+	    // Only match word with at least two chars -- webb
+	    // there's no need to call quote_meta,
+	    // alloc(7) is enough  -- Acevedo
+	    compl_pattern = alloc(7);
+	    if (compl_pattern == NULL)
+		return FAIL;
+	    STRCPY((char *)compl_pattern, "\\<");
+	    (void)quote_meta(compl_pattern + 2, line + compl_col, 1);
+	    STRCAT((char *)compl_pattern, "\\k");
+	}
+	else
+	{
+	    compl_pattern = alloc(quote_meta(NULL, line + compl_col,
+			compl_length) + 2);
+	    if (compl_pattern == NULL)
+		return FAIL;
+	    STRCPY((char *)compl_pattern, "\\<");
+	    (void)quote_meta(compl_pattern + 2, line + compl_col,
+		    compl_length);
+	}
+    }
+
+    return OK;
+}
+
+/*
+ * Get the pattern, column and length for whole line completion or for the
+ * complete() function.
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ */
+    static int
+get_wholeline_compl_info(char_u *line, colnr_T curs_col)
+{
+    compl_col = (colnr_T)getwhitecols(line);
+    compl_length = (int)curs_col - (int)compl_col;
+    if (compl_length < 0)	// cursor in indent: empty pattern
+	compl_length = 0;
+    if (p_ic)
+	compl_pattern = str_foldcase(line + compl_col, compl_length,
+		NULL, 0);
+    else
+	compl_pattern = vim_strnsave(line + compl_col, compl_length);
+    if (compl_pattern == NULL)
+	return FAIL;
+
+    return OK;
+}
+
+/*
+ * Get the pattern, column and length for filename completion.
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ */
+    static int
+get_filename_compl_info(char_u *line, int startcol, colnr_T curs_col)
+{
+    // Go back to just before the first filename character.
+    if (startcol > 0)
+    {
+	char_u	*p = line + startcol;
+
+	MB_PTR_BACK(line, p);
+	while (p > line && vim_isfilec(PTR2CHAR(p)))
+	    MB_PTR_BACK(line, p);
+	if (p == line && vim_isfilec(PTR2CHAR(p)))
+	    startcol = 0;
+	else
+	    startcol = (int)(p - line) + 1;
+    }
+
+    compl_col += startcol;
+    compl_length = (int)curs_col - startcol;
+    compl_pattern = addstar(line + compl_col, compl_length, EXPAND_FILES);
+    if (compl_pattern == NULL)
+	return FAIL;
+
+    return OK;
+}
+
+/*
+ * Get the pattern, column and length for command-line completion.
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ */
+    static int
+get_cmdline_compl_info(char_u *line, colnr_T curs_col)
+{
+    compl_pattern = vim_strnsave(line, curs_col);
+    if (compl_pattern == NULL)
+	return FAIL;
+    set_cmd_context(&compl_xp, compl_pattern,
+	    (int)STRLEN(compl_pattern), curs_col, FALSE);
+    if (compl_xp.xp_context == EXPAND_UNSUCCESSFUL
+	    || compl_xp.xp_context == EXPAND_NOTHING)
+	// No completion possible, use an empty pattern to get a
+	// "pattern not found" message.
+	compl_col = curs_col;
+    else
+	compl_col = (int)(compl_xp.xp_pattern - compl_pattern);
+    compl_length = curs_col - compl_col;
+
+    return OK;
+}
+
+/*
+ * Get the pattern, column and length for user defined completion ('omnifunc',
+ * 'completefunc' and 'thesaurusfunc')
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ * Uses the global variable: spell_bad_len
+ */
+    static int
+get_userdefined_compl_info(colnr_T curs_col UNUSED)
+{
+    int		ret = FAIL;
+
+#ifdef FEAT_COMPL_FUNC
+    // Call user defined function 'completefunc' with "a:findstart"
+    // set to 1 to obtain the length of text to use for completion.
+    char_u	*line;
+    typval_T	args[3];
+    int		col;
+    char_u	*funcname;
+    pos_T	pos;
+    int		save_State = State;
+    callback_T	*cb;
+
+    // Call 'completefunc' or 'omnifunc' or 'thesaurusfunc' and get pattern
+    // length as a string
+    funcname = get_complete_funcname(ctrl_x_mode);
+    if (*funcname == NUL)
+    {
+	semsg(_(e_option_str_is_not_set), ctrl_x_mode_function()
+		? "completefunc" : "omnifunc");
+	return FAIL;
+    }
+
+    args[0].v_type = VAR_NUMBER;
+    args[0].vval.v_number = 1;
+    args[1].v_type = VAR_STRING;
+    args[1].vval.v_string = (char_u *)"";
+    args[2].v_type = VAR_UNKNOWN;
+    pos = curwin->w_cursor;
+    ++textlock;
+    cb = get_insert_callback(ctrl_x_mode);
+    col = call_callback_retnr(cb, 2, args);
+    --textlock;
+
+    State = save_State;
+    curwin->w_cursor = pos;	// restore the cursor position
+    validate_cursor();
+    if (!EQUAL_POS(curwin->w_cursor, pos))
+    {
+	emsg(_(e_complete_function_deleted_text));
+	return FAIL;
+    }
+
+    // Return value -2 means the user complete function wants to cancel the
+    // complete without an error, do the same if the function did not execute
+    // successfully.
+    if (col == -2 || aborting())
+	return FAIL;
+    // Return value -3 does the same as -2 and leaves CTRL-X mode.
+    if (col == -3)
+    {
+	ctrl_x_mode = CTRL_X_NORMAL;
+	edit_submode = NULL;
+	if (!shortmess(SHM_COMPLETIONMENU))
+	    msg_clr_cmdline();
+	return FAIL;
+    }
+
+    // Reset extended parameters of completion, when starting new
+    // completion.
+    compl_opt_refresh_always = FALSE;
+    compl_opt_suppress_empty = FALSE;
+
+    if (col < 0)
+	col = curs_col;
+    compl_col = col;
+    if (compl_col > curs_col)
+	compl_col = curs_col;
+
+    // Setup variables for completion.  Need to obtain "line" again,
+    // it may have become invalid.
+    line = ml_get(curwin->w_cursor.lnum);
+    compl_length = curs_col - compl_col;
+    compl_pattern = vim_strnsave(line + compl_col, compl_length);
+    if (compl_pattern == NULL)
+	return FAIL;
+
+    ret = OK;
+#endif
+
+    return ret;
+}
+
+/*
+ * Get the pattern, column and length for spell completion.
+ * Sets the global variables: compl_col, compl_length and compl_pattern.
+ * Uses the global variable: spell_bad_len
+ */
+    static int
+get_spell_compl_info(int startcol UNUSED, colnr_T curs_col UNUSED)
+{
+    int		ret = FAIL;
+#ifdef FEAT_SPELL
+    char_u	*line;
+
+    if (spell_bad_len > 0)
+	compl_col = curs_col - spell_bad_len;
+    else
+	compl_col = spell_word_start(startcol);
+    if (compl_col >= (colnr_T)startcol)
+    {
+	compl_length = 0;
+	compl_col = curs_col;
+    }
+    else
+    {
+	spell_expand_check_cap(compl_col);
+	compl_length = (int)curs_col - compl_col;
+    }
+    // Need to obtain "line" again, it may have become invalid.
+    line = ml_get(curwin->w_cursor.lnum);
+    compl_pattern = vim_strnsave(line + compl_col, compl_length);
+    if (compl_pattern == NULL)
+	return FAIL;
+
+    ret = OK;
+#endif
+
+    return ret;
+}
+
+/*
+ * Get the completion pattern, column and length.
+ * "startcol" - start column number of the completion pattern/text
+ * "cur_col" - current cursor column
+ * On return, "line_invalid" is set to TRUE, if the current line may have
+ * become invalid and needs to be fetched again.
+ * Returns OK on success.
+ */
+    static int
+compl_get_info(char_u *line, int startcol, colnr_T curs_col, int *line_invalid)
+{
+    if (ctrl_x_mode_normal()
+	    || (ctrl_x_mode & CTRL_X_WANT_IDENT
+		&& !thesaurus_func_complete(ctrl_x_mode)))
+    {
+	return get_normal_compl_info(line, startcol, curs_col);
+    }
+    else if (ctrl_x_mode_line_or_eval())
+    {
+	return get_wholeline_compl_info(line, curs_col);
+    }
+    else if (ctrl_x_mode_files())
+    {
+	return get_filename_compl_info(line, startcol, curs_col);
+    }
+    else if (ctrl_x_mode == CTRL_X_CMDLINE)
+    {
+	return get_cmdline_compl_info(line, curs_col);
+    }
+    else if (ctrl_x_mode_function() || ctrl_x_mode_omni()
+	    || thesaurus_func_complete(ctrl_x_mode))
+    {
+	if (get_userdefined_compl_info(curs_col) == FAIL)
+	    return FAIL;
+	*line_invalid = TRUE;	// "line" may have become invalid
+    }
+    else if (ctrl_x_mode_spell())
+    {
+	if (get_spell_compl_info(startcol, curs_col) == FAIL)
+	    return FAIL;
+	*line_invalid = TRUE;	// "line" may have become invalid
+    }
+    else
+    {
+	internal_error("ins_complete()");
+	return FAIL;
+    }
+
+    return OK;
+}
+
+/*
+ * Continue an interrupted completion mode search in "line".
+ *
+ * If this same ctrl_x_mode has been interrupted use the text from
+ * "compl_startpos" to the cursor as a pattern to add a new word instead of
+ * expand the one before the cursor, in word-wise if "compl_startpos" is not in
+ * the same line as the cursor then fix it (the line has been split because it
+ * was longer than 'tw').  if SOL is set then skip the previous pattern, a word
+ * at the beginning of the line has been inserted, we'll look for that.
+ */
+    static void
+ins_compl_continue_search(char_u *line)
+{
+    // it is a continued search
+    compl_cont_status &= ~CONT_INTRPT;	// remove INTRPT
+    if (ctrl_x_mode_normal() || ctrl_x_mode_path_patterns()
+						|| ctrl_x_mode_path_defines())
+    {
+	if (compl_startpos.lnum != curwin->w_cursor.lnum)
+	{
+	    // line (probably) wrapped, set compl_startpos to the
+	    // first non_blank in the line, if it is not a wordchar
+	    // include it to get a better pattern, but then we don't
+	    // want the "\\<" prefix, check it below
+	    compl_col = (colnr_T)getwhitecols(line);
+	    compl_startpos.col = compl_col;
+	    compl_startpos.lnum = curwin->w_cursor.lnum;
+	    compl_cont_status &= ~CONT_SOL;   // clear SOL if present
+	}
+	else
+	{
+	    // S_IPOS was set when we inserted a word that was at the
+	    // beginning of the line, which means that we'll go to SOL
+	    // mode but first we need to redefine compl_startpos
+	    if (compl_cont_status & CONT_S_IPOS)
+	    {
+		compl_cont_status |= CONT_SOL;
+		compl_startpos.col = (colnr_T)(skipwhite(
+			    line + compl_length
+			    + compl_startpos.col) - line);
+	    }
+	    compl_col = compl_startpos.col;
+	}
+	compl_length = curwin->w_cursor.col - (int)compl_col;
+	// IObuff is used to add a "word from the next line" would we
+	// have enough space?  just being paranoid
+#define	MIN_SPACE 75
+	if (compl_length > (IOSIZE - MIN_SPACE))
+	{
+	    compl_cont_status &= ~CONT_SOL;
+	    compl_length = (IOSIZE - MIN_SPACE);
+	    compl_col = curwin->w_cursor.col - compl_length;
+	}
+	compl_cont_status |= CONT_ADDING | CONT_N_ADDS;
+	if (compl_length < 1)
+	    compl_cont_status &= CONT_LOCAL;
+    }
+    else if (ctrl_x_mode_line_or_eval())
+	compl_cont_status = CONT_ADDING | CONT_N_ADDS;
+    else
+	compl_cont_status = 0;
+}
+
+/*
+ * start insert mode completion
+ */
+    static int
+ins_compl_start(void)
+{
+    char_u	*line;
+    int		startcol = 0;	    // column where searched text starts
+    colnr_T	curs_col;	    // cursor column
+    int		line_invalid = FALSE;
+    int		save_did_ai = did_ai;
+    int		flags = CP_ORIGINAL_TEXT;
+
+    // First time we hit ^N or ^P (in a row, I mean)
+
+    did_ai = FALSE;
+    did_si = FALSE;
+    can_si = FALSE;
+    can_si_back = FALSE;
+    if (stop_arrow() == FAIL)
+	return FAIL;
+
+    line = ml_get(curwin->w_cursor.lnum);
+    curs_col = curwin->w_cursor.col;
+    compl_pending = 0;
+
+    if ((compl_cont_status & CONT_INTRPT) == CONT_INTRPT
+	    && compl_cont_mode == ctrl_x_mode)
+	// this same ctrl-x_mode was interrupted previously. Continue the
+	// completion.
+	ins_compl_continue_search(line);
+    else
+	compl_cont_status &= CONT_LOCAL;
+
+    if (!compl_status_adding())	// normal expansion
+    {
+	compl_cont_mode = ctrl_x_mode;
+	if (ctrl_x_mode_not_default())
+	    // Remove LOCAL if ctrl_x_mode != CTRL_X_NORMAL
+	    compl_cont_status = 0;
+	compl_cont_status |= CONT_N_ADDS;
+	compl_startpos = curwin->w_cursor;
+	startcol = (int)curs_col;
+	compl_col = 0;
+    }
+
+    // Work out completion pattern and original text -- webb
+    if (compl_get_info(line, startcol, curs_col, &line_invalid) == FAIL)
+    {
+	if (ctrl_x_mode_function() || ctrl_x_mode_omni()
+				|| thesaurus_func_complete(ctrl_x_mode))
+	    // restore did_ai, so that adding comment leader works
+	    did_ai = save_did_ai;
+	return FAIL;
+    }
+    // If "line" was changed while getting completion info get it again.
+    if (line_invalid)
+	line = ml_get(curwin->w_cursor.lnum);
+
+    if (compl_status_adding())
+    {
+	edit_submode_pre = (char_u *)_(" Adding");
+	if (ctrl_x_mode_line_or_eval())
+	{
+	    // Insert a new line, keep indentation but ignore 'comments'.
+	    char_u *old = curbuf->b_p_com;
+
+	    curbuf->b_p_com = (char_u *)"";
+	    compl_startpos.lnum = curwin->w_cursor.lnum;
+	    compl_startpos.col = compl_col;
+	    ins_eol('\r');
+	    curbuf->b_p_com = old;
+	    compl_length = 0;
+	    compl_col = curwin->w_cursor.col;
+	}
+    }
+    else
+    {
+	edit_submode_pre = NULL;
+	compl_startpos.col = compl_col;
+    }
+
+    if (compl_cont_status & CONT_LOCAL)
+	edit_submode = (char_u *)_(ctrl_x_msgs[CTRL_X_LOCAL_MSG]);
+    else
+	edit_submode = (char_u *)_(CTRL_X_MSG(ctrl_x_mode));
+
+    // If any of the original typed text has been changed we need to fix
+    // the redo buffer.
+    ins_compl_fixRedoBufForLeader(NULL);
+
+    // Always add completion for the original text.
+    vim_free(compl_orig_text);
+    compl_orig_text = vim_strnsave(line + compl_col, compl_length);
+    if (p_ic)
+	flags |= CP_ICASE;
+    if (compl_orig_text == NULL || ins_compl_add(compl_orig_text,
+		-1, NULL, NULL, NULL, 0, flags, FALSE) != OK)
+    {
+	VIM_CLEAR(compl_pattern);
+	VIM_CLEAR(compl_orig_text);
+	return FAIL;
+    }
+
+    // showmode might reset the internal line pointers, so it must
+    // be called before line = ml_get(), or when this address is no
+    // longer needed.  -- Acevedo.
+    edit_submode_extra = (char_u *)_("-- Searching...");
+    edit_submode_highl = HLF_COUNT;
+    showmode();
+    edit_submode_extra = NULL;
+    out_flush();
+
+    return OK;
+}
+
+/*
+ * display the completion status message
+ */
+    static void
+ins_compl_show_statusmsg(void)
+{
+    // we found no match if the list has only the "compl_orig_text"-entry
+    if (is_first_match(compl_first_match->cp_next))
+    {
+	edit_submode_extra = compl_status_adding() && compl_length > 1
+				? (char_u *)_("Hit end of paragraph")
+				: (char_u *)_("Pattern not found");
+	edit_submode_highl = HLF_E;
+    }
+
+    if (edit_submode_extra == NULL)
+    {
+	if (match_at_original_text(compl_curr_match))
+	{
+	    edit_submode_extra = (char_u *)_("Back at original");
+	    edit_submode_highl = HLF_W;
+	}
+	else if (compl_cont_status & CONT_S_IPOS)
+	{
+	    edit_submode_extra = (char_u *)_("Word from other line");
+	    edit_submode_highl = HLF_COUNT;
+	}
+	else if (compl_curr_match->cp_next == compl_curr_match->cp_prev)
+	{
+	    edit_submode_extra = (char_u *)_("The only match");
+	    edit_submode_highl = HLF_COUNT;
+	    compl_curr_match->cp_number = 1;
+	}
+	else
+	{
+#if defined(FEAT_COMPL_FUNC) || defined(FEAT_EVAL)
+	    // Update completion sequence number when needed.
+	    if (compl_curr_match->cp_number == -1)
+		ins_compl_update_sequence_numbers();
+#endif
+	    // The match should always have a sequence number now, this is
+	    // just a safety check.
+	    if (compl_curr_match->cp_number != -1)
+	    {
+		// Space for 10 text chars. + 2x10-digit no.s = 31.
+		// Translations may need more than twice that.
+		static char_u match_ref[81];
+
+		if (compl_matches > 0)
+		    vim_snprintf((char *)match_ref, sizeof(match_ref),
+			    _("match %d of %d"),
+			    compl_curr_match->cp_number, compl_matches);
+		else
+		    vim_snprintf((char *)match_ref, sizeof(match_ref),
+			    _("match %d"),
+			    compl_curr_match->cp_number);
+		edit_submode_extra = match_ref;
+		edit_submode_highl = HLF_R;
+		if (dollar_vcol >= 0)
+		    curs_columns(FALSE);
+	    }
+	}
+    }
+
+    // Show a message about what (completion) mode we're in.
+    if (!compl_opt_suppress_empty)
+    {
+	showmode();
+	if (!shortmess(SHM_COMPLETIONMENU))
+	{
+	    if (edit_submode_extra != NULL)
+	    {
+		if (!p_smd)
+		{
+		    msg_hist_off = TRUE;
+		    msg_attr((char *)edit_submode_extra,
+			    edit_submode_highl < HLF_COUNT
+			    ? HL_ATTR(edit_submode_highl) : 0);
+		    msg_hist_off = FALSE;
+		}
+	    }
+	    else
+		msg_clr_cmdline();	// necessary for "noshowmode"
+	}
+    }
+}
+
+/*
+ * Do Insert mode completion.
+ * Called when character "c" was typed, which has a meaning for completion.
+ * Returns OK if completion was done, FAIL if something failed (out of mem).
+ */
+    int
+ins_complete(int c, int enable_pum)
+{
+    int		n;
+    int		save_w_wrow;
+    int		save_w_leftcol;
+    int		insert_match;
+
+    compl_direction = ins_compl_key2dir(c);
+    insert_match = ins_compl_use_match(c);
+
+    if (!compl_started)
+    {
+	if (ins_compl_start() == FAIL)
+	    return FAIL;
+    }
+    else if (insert_match && stop_arrow() == FAIL)
+	return FAIL;
+
+    compl_shown_match = compl_curr_match;
+    compl_shows_dir = compl_direction;
+
+    // Find next match (and following matches).
+    save_w_wrow = curwin->w_wrow;
+    save_w_leftcol = curwin->w_leftcol;
+    n = ins_compl_next(TRUE, ins_compl_key2count(c), insert_match, FALSE);
+
+    // may undisplay the popup menu
+    ins_compl_upd_pum();
+
+    if (n > 1)		// all matches have been found
+	compl_matches = n;
+    compl_curr_match = compl_shown_match;
+    compl_direction = compl_shows_dir;
+
+    // Eat the ESC that vgetc() returns after a CTRL-C to avoid leaving Insert
+    // mode.
+    if (got_int && !global_busy)
+    {
+	(void)vgetc();
+	got_int = FALSE;
+    }
+
+    // we found no match if the list has only the "compl_orig_text"-entry
+    if (is_first_match(compl_first_match->cp_next))
+    {
+	// remove N_ADDS flag, so next ^X<> won't try to go to ADDING mode,
+	// because we couldn't expand anything at first place, but if we used
+	// ^P, ^N, ^X^I or ^X^D we might want to add-expand a single-char-word
+	// (such as M in M'exico) if not tried already.  -- Acevedo
+	if (compl_length > 1
+		|| compl_status_adding()
+		|| (ctrl_x_mode_not_default()
+		    && !ctrl_x_mode_path_patterns()
+		    && !ctrl_x_mode_path_defines()))
+	    compl_cont_status &= ~CONT_N_ADDS;
+    }
+
+    if (compl_curr_match->cp_flags & CP_CONT_S_IPOS)
+	compl_cont_status |= CONT_S_IPOS;
+    else
+	compl_cont_status &= ~CONT_S_IPOS;
+
+    ins_compl_show_statusmsg();
+
+    // Show the popup menu, unless we got interrupted.
+    if (enable_pum && !compl_interrupted)
+	show_pum(save_w_wrow, save_w_leftcol);
+
+    compl_was_interrupted = compl_interrupted;
+    compl_interrupted = FALSE;
+
+    return OK;
+}
+
+/*
+ * Remove (if needed) and show the popup menu
+ */
+    static void
+show_pum(int prev_w_wrow, int prev_w_leftcol)
+{
+    // RedrawingDisabled may be set when invoked through complete().
+    int n = RedrawingDisabled;
+
+    RedrawingDisabled = 0;
+
+    // If the cursor moved or the display scrolled we need to remove the pum
+    // first.
+    setcursor();
+    if (prev_w_wrow != curwin->w_wrow || prev_w_leftcol != curwin->w_leftcol)
+	ins_compl_del_pum();
+
+    ins_compl_show_pum();
+    setcursor();
+    RedrawingDisabled = n;
+}
+
+/*
+ * Looks in the first "len" chars. of "src" for search-metachars.
+ * If dest is not NULL the chars. are copied there quoting (with
+ * a backslash) the metachars, and dest would be NUL terminated.
+ * Returns the length (needed) of dest
+ */
+    static unsigned
+quote_meta(char_u *dest, char_u *src, int len)
+{
+    unsigned	m = (unsigned)len + 1;  // one extra for the NUL
+
+    for ( ; --len >= 0; src++)
+    {
+	switch (*src)
+	{
+	    case '.':
+	    case '*':
+	    case '[':
+		if (ctrl_x_mode_dictionary() || ctrl_x_mode_thesaurus())
+		    break;
+		// FALLTHROUGH
+	    case '~':
+		if (!magic_isset())	// quote these only if magic is set
+		    break;
+		// FALLTHROUGH
+	    case '\\':
+		if (ctrl_x_mode_dictionary() || ctrl_x_mode_thesaurus())
+		    break;
+		// FALLTHROUGH
+	    case '^':		// currently it's not needed.
+	    case '$':
+		m++;
+		if (dest != NULL)
+		    *dest++ = '\\';
+		break;
+	}
+	if (dest != NULL)
+	    *dest++ = *src;
+	// Copy remaining bytes of a multibyte character.
+	if (has_mbyte)
+	{
+	    int i, mb_len;
+
+	    mb_len = (*mb_ptr2len)(src) - 1;
+	    if (mb_len > 0 && len >= mb_len)
+		for (i = 0; i < mb_len; ++i)
+		{
+		    --len;
+		    ++src;
+		    if (dest != NULL)
+			*dest++ = *src;
+		}
+	}
+    }
+    if (dest != NULL)
+	*dest = NUL;
+
+    return m;
+}
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+free_insexpand_stuff(void)
+{
+    VIM_CLEAR(compl_orig_text);
+# ifdef FEAT_EVAL
+    free_callback(&cfu_cb);
+    free_callback(&ofu_cb);
+    free_callback(&tsrfu_cb);
+# endif
+}
+#endif
+
+#ifdef FEAT_SPELL
+/*
+ * Called when starting CTRL_X_SPELL mode: Move backwards to a previous badly
+ * spelled word, if there is one.
+ */
+    static void
+spell_back_to_badword(void)
+{
+    pos_T	tpos = curwin->w_cursor;
+
+    spell_bad_len = spell_move_to(curwin, BACKWARD, TRUE, TRUE, NULL);
+    if (curwin->w_cursor.col != tpos.col)
+	start_arrow(&tpos);
+}
+#endif