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, 3203 insertions, 0 deletions

diff --git a/src/map.c b/src/map.c
new file mode 100644
index 0000000..7c95286
--- /dev/null
+++ b/src/map.c
@@ -0,0 +1,3203 @@
+/* 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.
+ */
+
+/*
+ * map.c: Code for mappings and abbreviations.
+ */
+
+#include "vim.h"
+
+/*
+ * List used for abbreviations.
+ */
+static mapblock_T	*first_abbr = NULL; // first entry in abbrlist
+
+/*
+ * Each mapping is put in one of the 256 hash lists, to speed up finding it.
+ */
+static mapblock_T	*(maphash[256]);
+static int		maphash_valid = FALSE;
+
+// When non-zero then no mappings can be added or removed.  Prevents mappings
+// to change while listing them.
+static int		map_locked = 0;
+
+/*
+ * Make a hash value for a mapping.
+ * "mode" is the lower 4 bits of the State for the mapping.
+ * "c1" is the first character of the "lhs".
+ * Returns a value between 0 and 255, index in maphash.
+ * Put Normal/Visual mode mappings mostly separately from Insert/Cmdline mode.
+ */
+#define MAP_HASH(mode, c1) (((mode) & (MODE_NORMAL | MODE_VISUAL | MODE_SELECT | MODE_OP_PENDING | MODE_TERMINAL)) ? (c1) : ((c1) ^ 0x80))
+
+/*
+ * Get the start of the hashed map list for "state" and first character "c".
+ */
+    mapblock_T *
+get_maphash_list(int state, int c)
+{
+    return maphash[MAP_HASH(state, c)];
+}
+
+/*
+ * Get the buffer-local hashed map list for "state" and first character "c".
+ */
+    mapblock_T *
+get_buf_maphash_list(int state, int c)
+{
+    return curbuf->b_maphash[MAP_HASH(state, c)];
+}
+
+    int
+is_maphash_valid(void)
+{
+    return maphash_valid;
+}
+
+/*
+ * Initialize maphash[] for first use.
+ */
+    static void
+validate_maphash(void)
+{
+    if (maphash_valid)
+	return;
+
+    CLEAR_FIELD(maphash);
+    maphash_valid = TRUE;
+}
+
+/*
+ * Delete one entry from the abbrlist or maphash[].
+ * "mpp" is a pointer to the m_next field of the PREVIOUS entry!
+ */
+    static void
+map_free(mapblock_T **mpp)
+{
+    mapblock_T	*mp;
+
+    mp = *mpp;
+    vim_free(mp->m_keys);
+    vim_free(mp->m_str);
+    vim_free(mp->m_orig_str);
+    *mpp = mp->m_next;
+#ifdef FEAT_EVAL
+    reset_last_used_map(mp);
+#endif
+    vim_free(mp);
+}
+
+/*
+ * Return characters to represent the map mode in an allocated string.
+ * Returns NULL when out of memory.
+ */
+    static char_u *
+map_mode_to_chars(int mode)
+{
+    garray_T    mapmode;
+
+    ga_init2(&mapmode, 1, 7);
+
+    if ((mode & (MODE_INSERT | MODE_CMDLINE)) == (MODE_INSERT | MODE_CMDLINE))
+	ga_append(&mapmode, '!');			// :map!
+    else if (mode & MODE_INSERT)
+	ga_append(&mapmode, 'i');			// :imap
+    else if (mode & MODE_LANGMAP)
+	ga_append(&mapmode, 'l');			// :lmap
+    else if (mode & MODE_CMDLINE)
+	ga_append(&mapmode, 'c');			// :cmap
+    else if ((mode
+		 & (MODE_NORMAL | MODE_VISUAL | MODE_SELECT | MODE_OP_PENDING))
+		== (MODE_NORMAL | MODE_VISUAL | MODE_SELECT | MODE_OP_PENDING))
+	ga_append(&mapmode, ' ');			// :map
+    else
+    {
+	if (mode & MODE_NORMAL)
+	    ga_append(&mapmode, 'n');			// :nmap
+	if (mode & MODE_OP_PENDING)
+	    ga_append(&mapmode, 'o');			// :omap
+	if (mode & MODE_TERMINAL)
+	    ga_append(&mapmode, 't');			// :tmap
+	if ((mode & (MODE_VISUAL | MODE_SELECT)) == (MODE_VISUAL | MODE_SELECT))
+	    ga_append(&mapmode, 'v');			// :vmap
+	else
+	{
+	    if (mode & MODE_VISUAL)
+		ga_append(&mapmode, 'x');		// :xmap
+	    if (mode & MODE_SELECT)
+		ga_append(&mapmode, 's');		// :smap
+	}
+    }
+
+    ga_append(&mapmode, NUL);
+    return (char_u *)mapmode.ga_data;
+}
+
+/*
+ * Output a line for one mapping.
+ */
+    static void
+showmap(
+    mapblock_T	*mp,
+    int		local)	    // TRUE for buffer-local map
+{
+    int		len = 1;
+    char_u	*mapchars;
+
+    if (message_filtered(mp->m_keys) && message_filtered(mp->m_str))
+	return;
+
+    // Prevent mappings to be cleared while at the more prompt.
+    // Must jump to "theend" instead of returning.
+    ++map_locked;
+
+    if (msg_didout || msg_silent != 0)
+    {
+	msg_putchar('\n');
+	if (got_int)	    // 'q' typed at MORE prompt
+	    goto theend;
+    }
+
+    mapchars = map_mode_to_chars(mp->m_mode);
+    if (mapchars != NULL)
+    {
+	msg_puts((char *)mapchars);
+	len = (int)STRLEN(mapchars);
+	vim_free(mapchars);
+    }
+
+    while (++len <= 3)
+	msg_putchar(' ');
+
+    // Display the LHS.  Get length of what we write.
+    len = msg_outtrans_special(mp->m_keys, TRUE, 0);
+    do
+    {
+	msg_putchar(' ');		// pad with blanks
+	++len;
+    } while (len < 12);
+
+    if (mp->m_noremap == REMAP_NONE)
+	msg_puts_attr("*", HL_ATTR(HLF_8));
+    else if (mp->m_noremap == REMAP_SCRIPT)
+	msg_puts_attr("&", HL_ATTR(HLF_8));
+    else
+	msg_putchar(' ');
+
+    if (local)
+	msg_putchar('@');
+    else
+	msg_putchar(' ');
+
+    // Use FALSE below if we only want things like <Up> to show up as such on
+    // the rhs, and not M-x etc, TRUE gets both -- webb
+    if (*mp->m_str == NUL)
+	msg_puts_attr("<Nop>", HL_ATTR(HLF_8));
+    else
+	msg_outtrans_special(mp->m_str, FALSE, 0);
+#ifdef FEAT_EVAL
+    if (p_verbose > 0)
+	last_set_msg(mp->m_script_ctx);
+#endif
+    msg_clr_eos();
+    out_flush();			// show one line at a time
+
+theend:
+    --map_locked;
+}
+
+    static int
+map_add(
+	mapblock_T  **map_table,
+	mapblock_T  **abbr_table,
+	char_u	    *keys,
+	char_u	    *rhs,
+	char_u	    *orig_rhs,
+	int	    noremap,
+	int	    nowait,
+	int	    silent,
+	int	    mode,
+	int	    is_abbr,
+#ifdef FEAT_EVAL
+	int	    expr,
+	scid_T	    sid,	    // -1 to use current_sctx
+	int	    scriptversion,
+	linenr_T    lnum,
+#endif
+	int	    simplified)
+{
+    mapblock_T	*mp = ALLOC_CLEAR_ONE(mapblock_T);
+
+    if (mp == NULL)
+	return FAIL;
+
+    // If CTRL-C has been mapped, don't always use it for Interrupting.
+    if (*keys == Ctrl_C)
+    {
+	if (map_table == curbuf->b_maphash)
+	    curbuf->b_mapped_ctrl_c |= mode;
+	else
+	    mapped_ctrl_c |= mode;
+    }
+
+    mp->m_keys = vim_strsave(keys);
+    mp->m_str = vim_strsave(rhs);
+    mp->m_orig_str = vim_strsave(orig_rhs);
+    if (mp->m_keys == NULL || mp->m_str == NULL)
+    {
+	vim_free(mp->m_keys);
+	vim_free(mp->m_str);
+	vim_free(mp->m_orig_str);
+	vim_free(mp);
+	return FAIL;
+    }
+    mp->m_keylen = (int)STRLEN(mp->m_keys);
+    mp->m_noremap = noremap;
+    mp->m_nowait = nowait;
+    mp->m_silent = silent;
+    mp->m_mode = mode;
+    mp->m_simplified = simplified;
+#ifdef FEAT_EVAL
+    mp->m_expr = expr;
+    if (sid > 0)
+    {
+	mp->m_script_ctx.sc_sid = sid;
+	mp->m_script_ctx.sc_lnum = lnum;
+	mp->m_script_ctx.sc_version = scriptversion;
+    }
+    else
+    {
+	mp->m_script_ctx = current_sctx;
+	mp->m_script_ctx.sc_lnum += SOURCING_LNUM;
+    }
+#endif
+
+    // add the new entry in front of the abbrlist or maphash[] list
+    if (is_abbr)
+    {
+	mp->m_next = *abbr_table;
+	*abbr_table = mp;
+    }
+    else
+    {
+	int n = MAP_HASH(mp->m_mode, mp->m_keys[0]);
+
+	mp->m_next = map_table[n];
+	map_table[n] = mp;
+    }
+    return OK;
+}
+
+/*
+ * List mappings.  When "haskey" is FALSE all mappings, otherwise mappings that
+ * match "keys[keys_len]".
+ */
+    static void
+list_mappings(
+	int	keyround,
+	int	abbrev,
+	int	haskey,
+	char_u	*keys,
+	int	keys_len,
+	int	mode,
+	int	*did_local)
+{
+    // Prevent mappings to be cleared while at the more prompt.
+    ++map_locked;
+
+    if (p_verbose > 0 && keyround == 1)
+    {
+	if (seenModifyOtherKeys)
+	    msg_puts(_("Seen modifyOtherKeys: true\n"));
+
+	if (modify_otherkeys_state != MOKS_INITIAL)
+	{
+	    char *name = _("Unknown");
+	    switch (modify_otherkeys_state)
+	    {
+		case MOKS_INITIAL: break;
+		case MOKS_OFF: name = _("Off"); break;
+		case MOKS_ENABLED: name = _("On"); break;
+		case MOKS_DISABLED: name = _("Disabled"); break;
+		case MOKS_AFTER_T_TE: name = _("Cleared"); break;
+	    }
+
+	    char buf[200];
+	    vim_snprintf(buf, sizeof(buf),
+				    _("modifyOtherKeys detected: %s\n"), name);
+	    msg_puts(buf);
+	}
+
+	if (kitty_protocol_state != KKPS_INITIAL)
+	{
+	    char *name = _("Unknown");
+	    switch (kitty_protocol_state)
+	    {
+		case KKPS_INITIAL: break;
+		case KKPS_OFF: name = _("Off"); break;
+		case KKPS_ENABLED: name = _("On"); break;
+		case KKPS_DISABLED: name = _("Disabled"); break;
+		case KKPS_AFTER_T_TE: name = _("Cleared"); break;
+	    }
+
+	    char buf[200];
+	    vim_snprintf(buf, sizeof(buf),
+				     _("Kitty keyboard protocol: %s\n"), name);
+	    msg_puts(buf);
+	}
+    }
+
+    // need to loop over all global hash lists
+    for (int hash = 0; hash < 256 && !got_int; ++hash)
+    {
+	mapblock_T	*mp;
+
+	if (abbrev)
+	{
+	    if (hash != 0)	// there is only one abbreviation list
+		break;
+	    mp = curbuf->b_first_abbr;
+	}
+	else
+	    mp = curbuf->b_maphash[hash];
+	for ( ; mp != NULL && !got_int; mp = mp->m_next)
+	{
+	    // check entries with the same mode
+	    if (!mp->m_simplified && (mp->m_mode & mode) != 0)
+	    {
+		if (!haskey)		    // show all entries
+		{
+		    showmap(mp, TRUE);
+		    *did_local = TRUE;
+		}
+		else
+		{
+		    int n = mp->m_keylen;
+		    if (STRNCMP(mp->m_keys, keys,
+				   (size_t)(n < keys_len ? n : keys_len)) == 0)
+		    {
+			showmap(mp, TRUE);
+			*did_local = TRUE;
+		    }
+		}
+	    }
+	}
+    }
+
+    --map_locked;
+}
+
+/*
+ * map[!]		    : show all key mappings
+ * map[!] {lhs}		    : show key mapping for {lhs}
+ * map[!] {lhs} {rhs}	    : set key mapping for {lhs} to {rhs}
+ * noremap[!] {lhs} {rhs}   : same, but no remapping for {rhs}
+ * unmap[!] {lhs}	    : remove key mapping for {lhs}
+ * abbr			    : show all abbreviations
+ * abbr {lhs}		    : show abbreviations for {lhs}
+ * abbr {lhs} {rhs}	    : set abbreviation for {lhs} to {rhs}
+ * noreabbr {lhs} {rhs}	    : same, but no remapping for {rhs}
+ * unabbr {lhs}		    : remove abbreviation for {lhs}
+ *
+ * maptype: MAPTYPE_MAP for :map
+ *	    MAPTYPE_UNMAP for :unmap
+ *	    MAPTYPE_NOREMAP for noremap
+ *
+ * arg is pointer to any arguments. Note: arg cannot be a read-only string,
+ * it will be modified.
+ *
+ * for :map   mode is MODE_NORMAL | MODE_VISUAL | MODE_SELECT | MODE_OP_PENDING
+ * for :map!  mode is MODE_INSERT | MODE_CMDLINE
+ * for :cmap  mode is MODE_CMDLINE
+ * for :imap  mode is MODE_INSERT
+ * for :lmap  mode is MODE_LANGMAP
+ * for :nmap  mode is MODE_NORMAL
+ * for :vmap  mode is MODE_VISUAL | MODE_SELECT
+ * for :xmap  mode is MODE_VISUAL
+ * for :smap  mode is MODE_SELECT
+ * for :omap  mode is MODE_OP_PENDING
+ * for :tmap  mode is MODE_TERMINAL
+ *
+ * for :abbr  mode is MODE_INSERT | MODE_CMDLINE
+ * for :iabbr mode is MODE_INSERT
+ * for :cabbr mode is MODE_CMDLINE
+ *
+ * Return 0 for success
+ *	  1 for invalid arguments
+ *	  2 for no match
+ *	  4 for out of mem
+ *	  5 for entry not unique
+ */
+    int
+do_map(
+    int		maptype,
+    char_u	*arg,
+    int		mode,
+    int		abbrev)		// not a mapping but an abbreviation
+{
+    char_u	*keys;
+    mapblock_T	*mp, **mpp;
+    char_u	*rhs;
+    char_u	*p;
+    int		n;
+    int		len = 0;	// init for GCC
+    int		hasarg;
+    int		haskey;
+    int		do_print;
+    int		keyround;
+    char_u	*keys_buf = NULL;
+    char_u	*alt_keys_buf = NULL;
+    char_u	*arg_buf = NULL;
+    int		retval = 0;
+    int		do_backslash;
+    mapblock_T	**abbr_table;
+    mapblock_T	**map_table;
+    int		unique = FALSE;
+    int		nowait = FALSE;
+    int		silent = FALSE;
+    int		special = FALSE;
+#ifdef FEAT_EVAL
+    int		expr = FALSE;
+#endif
+    int		did_simplify = FALSE;
+    int		noremap;
+    char_u      *orig_rhs;
+
+    keys = arg;
+    map_table = maphash;
+    abbr_table = &first_abbr;
+
+    // For ":noremap" don't remap, otherwise do remap.
+    if (maptype == MAPTYPE_NOREMAP)
+	noremap = REMAP_NONE;
+    else
+	noremap = REMAP_YES;
+
+    // Accept <buffer>, <nowait>, <silent>, <expr> <script> and <unique> in
+    // any order.
+    for (;;)
+    {
+	// Check for "<buffer>": mapping local to buffer.
+	if (STRNCMP(keys, "<buffer>", 8) == 0)
+	{
+	    keys = skipwhite(keys + 8);
+	    map_table = curbuf->b_maphash;
+	    abbr_table = &curbuf->b_first_abbr;
+	    continue;
+	}
+
+	// Check for "<nowait>": don't wait for more characters.
+	if (STRNCMP(keys, "<nowait>", 8) == 0)
+	{
+	    keys = skipwhite(keys + 8);
+	    nowait = TRUE;
+	    continue;
+	}
+
+	// Check for "<silent>": don't echo commands.
+	if (STRNCMP(keys, "<silent>", 8) == 0)
+	{
+	    keys = skipwhite(keys + 8);
+	    silent = TRUE;
+	    continue;
+	}
+
+	// Check for "<special>": accept special keys in <>
+	if (STRNCMP(keys, "<special>", 9) == 0)
+	{
+	    keys = skipwhite(keys + 9);
+	    special = TRUE;
+	    continue;
+	}
+
+#ifdef FEAT_EVAL
+	// Check for "<script>": remap script-local mappings only
+	if (STRNCMP(keys, "<script>", 8) == 0)
+	{
+	    keys = skipwhite(keys + 8);
+	    noremap = REMAP_SCRIPT;
+	    continue;
+	}
+
+	// Check for "<expr>": {rhs} is an expression.
+	if (STRNCMP(keys, "<expr>", 6) == 0)
+	{
+	    keys = skipwhite(keys + 6);
+	    expr = TRUE;
+	    continue;
+	}
+#endif
+	// Check for "<unique>": don't overwrite an existing mapping.
+	if (STRNCMP(keys, "<unique>", 8) == 0)
+	{
+	    keys = skipwhite(keys + 8);
+	    unique = TRUE;
+	    continue;
+	}
+	break;
+    }
+
+    validate_maphash();
+
+    // Find end of keys and skip CTRL-Vs (and backslashes) in it.
+    // Accept backslash like CTRL-V when 'cpoptions' does not contain 'B'.
+    // with :unmap white space is included in the keys, no argument possible.
+    p = keys;
+    do_backslash = (vim_strchr(p_cpo, CPO_BSLASH) == NULL);
+    while (*p && (maptype == MAPTYPE_UNMAP || !VIM_ISWHITE(*p)))
+    {
+	if ((p[0] == Ctrl_V || (do_backslash && p[0] == '\\')) &&
+								  p[1] != NUL)
+	    ++p;		// skip CTRL-V or backslash
+	++p;
+    }
+    if (*p != NUL)
+	*p++ = NUL;
+
+    p = skipwhite(p);
+    rhs = p;
+    hasarg = (*rhs != NUL);
+    haskey = (*keys != NUL);
+    do_print = !haskey || (maptype != MAPTYPE_UNMAP && !hasarg);
+
+    // check for :unmap without argument
+    if (maptype == MAPTYPE_UNMAP && !haskey)
+    {
+	retval = 1;
+	goto theend;
+    }
+
+    // If mapping has been given as ^V<C_UP> say, then replace the term codes
+    // with the appropriate two bytes. If it is a shifted special key, unshift
+    // it too, giving another two bytes.
+    // replace_termcodes() may move the result to allocated memory, which
+    // needs to be freed later (*keys_buf and *arg_buf).
+    // replace_termcodes() also removes CTRL-Vs and sometimes backslashes.
+    // If something like <C-H> is simplified to 0x08 then mark it as simplified
+    // and also add an entry with a modifier, which will work when using a key
+    // protocol.
+    if (haskey)
+    {
+	char_u	*new_keys;
+	int	flags = REPTERM_FROM_PART | REPTERM_DO_LT;
+
+	if (special)
+	    flags |= REPTERM_SPECIAL;
+	new_keys = replace_termcodes(keys, &keys_buf, flags, &did_simplify);
+	if (did_simplify)
+	    (void)replace_termcodes(keys, &alt_keys_buf,
+					    flags | REPTERM_NO_SIMPLIFY, NULL);
+	keys = new_keys;
+    }
+    orig_rhs = rhs;
+    if (hasarg)
+    {
+	if (STRICMP(rhs, "<nop>") == 0)	    // "<Nop>" means nothing
+	    rhs = (char_u *)"";
+	else
+	    rhs = replace_termcodes(rhs, &arg_buf,
+			REPTERM_DO_LT | (special ? REPTERM_SPECIAL : 0), NULL);
+    }
+
+    /*
+     * The following is done twice if we have two versions of keys:
+     * "alt_keys_buf" is not NULL.
+     */
+    for (keyround = 1; keyround <= 2; ++keyround)
+    {
+	int	did_it = FALSE;
+	int	did_local = FALSE;
+	int	keyround1_simplified = keyround == 1 && did_simplify;
+	int	round;
+
+	if (keyround == 2)
+	{
+	    if (alt_keys_buf == NULL)
+		break;
+	    keys = alt_keys_buf;
+	}
+	else if (alt_keys_buf != NULL && do_print)
+	    // when printing always use the not-simplified map
+	    keys = alt_keys_buf;
+
+	// check arguments and translate function keys
+	if (haskey)
+	{
+	    len = (int)STRLEN(keys);
+	    if (len > MAXMAPLEN)	// maximum length of MAXMAPLEN chars
+	    {
+		retval = 1;
+		goto theend;
+	    }
+
+	    if (abbrev && maptype != MAPTYPE_UNMAP)
+	    {
+		// If an abbreviation ends in a keyword character, the
+		// rest must be all keyword-char or all non-keyword-char.
+		// Otherwise we won't be able to find the start of it in a
+		// vi-compatible way.
+		if (has_mbyte)
+		{
+		    int	first, last;
+		    int	same = -1;
+
+		    first = vim_iswordp(keys);
+		    last = first;
+		    p = keys + (*mb_ptr2len)(keys);
+		    n = 1;
+		    while (p < keys + len)
+		    {
+			++n;			// nr of (multi-byte) chars
+			last = vim_iswordp(p);	// type of last char
+			if (same == -1 && last != first)
+			    same = n - 1;	// count of same char type
+			p += (*mb_ptr2len)(p);
+		    }
+		    if (last && n > 2 && same >= 0 && same < n - 1)
+		    {
+			retval = 1;
+			goto theend;
+		    }
+		}
+		else if (vim_iswordc(keys[len - 1]))
+		    // ends in keyword char
+		    for (n = 0; n < len - 2; ++n)
+			if (vim_iswordc(keys[n]) != vim_iswordc(keys[len - 2]))
+			{
+			    retval = 1;
+			    goto theend;
+			}
+		// An abbreviation cannot contain white space.
+		for (n = 0; n < len; ++n)
+		    if (VIM_ISWHITE(keys[n]))
+		    {
+			retval = 1;
+			goto theend;
+		    }
+	    }
+	}
+
+	if (haskey && hasarg && abbrev)	// if we will add an abbreviation
+	    no_abbr = FALSE;		// reset flag that indicates there are
+					// no abbreviations
+
+	if (do_print)
+	    msg_start();
+
+	// Check if a new local mapping wasn't already defined globally.
+	if (unique && map_table == curbuf->b_maphash
+			       && haskey && hasarg && maptype != MAPTYPE_UNMAP)
+	{
+	    // need to loop over all global hash lists
+	    for (int hash = 0; hash < 256 && !got_int; ++hash)
+	    {
+		if (abbrev)
+		{
+		    if (hash != 0)	// there is only one abbreviation list
+			break;
+		    mp = first_abbr;
+		}
+		else
+		    mp = maphash[hash];
+		for ( ; mp != NULL && !got_int; mp = mp->m_next)
+		{
+		    // check entries with the same mode
+		    if ((mp->m_mode & mode) != 0
+			    && mp->m_keylen == len
+			    && STRNCMP(mp->m_keys, keys, (size_t)len) == 0)
+		    {
+			if (abbrev)
+			    semsg(
+			       _(e_global_abbreviation_already_exists_for_str),
+				    mp->m_keys);
+			else
+			    semsg(_(e_global_mapping_already_exists_for_str),
+				    mp->m_keys);
+			retval = 5;
+			goto theend;
+		    }
+		}
+	    }
+	}
+
+	// When listing global mappings, also list buffer-local ones here.
+	if (map_table != curbuf->b_maphash && !hasarg
+						   && maptype != MAPTYPE_UNMAP)
+	    list_mappings(keyround, abbrev, haskey, keys, len,
+							     mode, &did_local);
+
+	// Find an entry in the maphash[] list that matches.
+	// For :unmap we may loop two times: once to try to unmap an entry with
+	// a matching 'from' part, a second time, if the first fails, to unmap
+	// an entry with a matching 'to' part. This was done to allow
+	// ":ab foo bar" to be unmapped by typing ":unab foo", where "foo" will
+	// be replaced by "bar" because of the abbreviation.
+	for (round = 0; (round == 0 || maptype == MAPTYPE_UNMAP) && round <= 1
+					       && !did_it && !got_int; ++round)
+	{
+	    // need to loop over all hash lists
+	    for (int hash = 0; hash < 256 && !got_int; ++hash)
+	    {
+		if (abbrev)
+		{
+		    if (hash > 0)	// there is only one abbreviation list
+			break;
+		    mpp = abbr_table;
+		}
+		else
+		    mpp = &(map_table[hash]);
+		for (mp = *mpp; mp != NULL && !got_int; mp = *mpp)
+		{
+
+		    if ((mp->m_mode & mode) == 0)
+		    {
+			// skip entries with wrong mode
+			mpp = &(mp->m_next);
+			continue;
+		    }
+		    if (!haskey)	// show all entries
+		    {
+			if (!mp->m_simplified)
+			{
+			    showmap(mp, map_table != maphash);
+			    did_it = TRUE;
+			}
+		    }
+		    else	// do we have a match?
+		    {
+			if (round)	// second round: Try unmap "rhs" string
+			{
+			    n = (int)STRLEN(mp->m_str);
+			    p = mp->m_str;
+			}
+			else
+			{
+			    n = mp->m_keylen;
+			    p = mp->m_keys;
+			}
+			if (STRNCMP(p, keys, (size_t)(n < len ? n : len)) == 0)
+			{
+			    if (maptype == MAPTYPE_UNMAP)
+			    {
+				// Delete entry.
+				// Only accept a full match.  For abbreviations
+				// we ignore trailing space when matching with
+				// the "lhs", since an abbreviation can't have
+				// trailing space.
+				if (n != len && (!abbrev || round || n > len
+					       || *skipwhite(keys + n) != NUL))
+				{
+				    mpp = &(mp->m_next);
+				    continue;
+				}
+				// In keyround for simplified keys, don't unmap
+				// a mapping without m_simplified flag.
+				if (keyround1_simplified && !mp->m_simplified)
+				    break;
+				// We reset the indicated mode bits. If nothing
+				// is left the entry is deleted below.
+				mp->m_mode &= ~mode;
+				did_it = TRUE;	// remember we did something
+			    }
+			    else if (!hasarg)	// show matching entry
+			    {
+				if (!mp->m_simplified)
+				{
+				    showmap(mp, map_table != maphash);
+				    did_it = TRUE;
+				}
+			    }
+			    else if (n != len)	// new entry is ambiguous
+			    {
+				mpp = &(mp->m_next);
+				continue;
+			    }
+			    else if (unique)
+			    {
+				if (abbrev)
+				    semsg(
+				      _(e_abbreviation_already_exists_for_str),
+					    p);
+				else
+				    semsg(_(e_mapping_already_exists_for_str),
+					    p);
+				retval = 5;
+				goto theend;
+			    }
+			    else
+			    {
+				// new rhs for existing entry
+				mp->m_mode &= ~mode;	// remove mode bits
+				if (mp->m_mode == 0 && !did_it) // reuse entry
+				{
+				    char_u *newstr = vim_strsave(rhs);
+
+				    if (newstr == NULL)
+				    {
+					retval = 4;		// no mem
+					goto theend;
+				    }
+				    vim_free(mp->m_str);
+				    mp->m_str = newstr;
+				    vim_free(mp->m_orig_str);
+				    mp->m_orig_str = vim_strsave(orig_rhs);
+				    mp->m_noremap = noremap;
+				    mp->m_nowait = nowait;
+				    mp->m_silent = silent;
+				    mp->m_mode = mode;
+				    mp->m_simplified = keyround1_simplified;
+#ifdef FEAT_EVAL
+				    mp->m_expr = expr;
+				    mp->m_script_ctx = current_sctx;
+				    mp->m_script_ctx.sc_lnum += SOURCING_LNUM;
+#endif
+				    did_it = TRUE;
+				}
+			    }
+			    if (mp->m_mode == 0)  // entry can be deleted
+			    {
+				map_free(mpp);
+				continue;	// continue with *mpp
+			    }
+
+			    // May need to put this entry into another hash
+			    // list.
+			    int new_hash = MAP_HASH(mp->m_mode, mp->m_keys[0]);
+			    if (!abbrev && new_hash != hash)
+			    {
+				*mpp = mp->m_next;
+				mp->m_next = map_table[new_hash];
+				map_table[new_hash] = mp;
+
+				continue;	// continue with *mpp
+			    }
+			}
+		    }
+		    mpp = &(mp->m_next);
+		}
+	    }
+	}
+
+	if (maptype == MAPTYPE_UNMAP)
+	{
+	    // delete entry
+	    if (!did_it)
+	    {
+		if (!keyround1_simplified)
+		    retval = 2;		// no match
+	    }
+	    else if (*keys == Ctrl_C)
+	    {
+		// If CTRL-C has been unmapped, reuse it for Interrupting.
+		if (map_table == curbuf->b_maphash)
+		    curbuf->b_mapped_ctrl_c &= ~mode;
+		else
+		    mapped_ctrl_c &= ~mode;
+	    }
+	    continue;
+	}
+
+	if (!haskey || !hasarg)
+	{
+	    // print entries
+	    if (!did_it && !did_local)
+	    {
+		if (abbrev)
+		    msg(_("No abbreviation found"));
+		else
+		    msg(_("No mapping found"));
+	    }
+	    goto theend;    // listing finished
+	}
+
+	if (did_it)
+	    continue;	// have added the new entry already
+
+	// Get here when adding a new entry to the maphash[] list or abbrlist.
+	if (map_add(map_table, abbr_table, keys, rhs, orig_rhs,
+		    noremap, nowait, silent, mode, abbrev,
+#ifdef FEAT_EVAL
+		    expr, /* sid */ -1, /* scriptversion */ 0, /* lnum */ 0,
+#endif
+		    keyround1_simplified) == FAIL)
+	{
+	    retval = 4;	    // no mem
+	    goto theend;
+	}
+    }
+
+theend:
+    vim_free(keys_buf);
+    vim_free(alt_keys_buf);
+    vim_free(arg_buf);
+    return retval;
+}
+
+/*
+ * Get the mapping mode from the command name.
+ */
+    static int
+get_map_mode(char_u **cmdp, int forceit)
+{
+    char_u	*p;
+    int		modec;
+    int		mode;
+
+    p = *cmdp;
+    modec = *p++;
+    if (modec == 'i')
+	mode = MODE_INSERT;				// :imap
+    else if (modec == 'l')
+	mode = MODE_LANGMAP;				// :lmap
+    else if (modec == 'c')
+	mode = MODE_CMDLINE;				// :cmap
+    else if (modec == 'n' && *p != 'o')		    // avoid :noremap
+	mode = MODE_NORMAL;				// :nmap
+    else if (modec == 'v')
+	mode = MODE_VISUAL | MODE_SELECT;		// :vmap
+    else if (modec == 'x')
+	mode = MODE_VISUAL;				// :xmap
+    else if (modec == 's')
+	mode = MODE_SELECT;			// :smap
+    else if (modec == 'o')
+	mode = MODE_OP_PENDING;			// :omap
+    else if (modec == 't')
+	mode = MODE_TERMINAL;			// :tmap
+    else
+    {
+	--p;
+	if (forceit)
+	    mode = MODE_INSERT | MODE_CMDLINE;		// :map !
+	else
+	    mode = MODE_VISUAL | MODE_SELECT | MODE_NORMAL | MODE_OP_PENDING;
+							// :map
+    }
+
+    *cmdp = p;
+    return mode;
+}
+
+/*
+ * Clear all mappings (":mapclear") or abbreviations (":abclear").
+ * "abbr" should be FALSE for mappings, TRUE for abbreviations.
+ */
+    static void
+map_clear(
+    char_u	*cmdp,
+    char_u	*arg,
+    int		forceit,
+    int		abbr)
+{
+    int		mode;
+    int		local;
+
+    local = (STRCMP(arg, "<buffer>") == 0);
+    if (!local && *arg != NUL)
+    {
+	emsg(_(e_invalid_argument));
+	return;
+    }
+
+    mode = get_map_mode(&cmdp, forceit);
+    map_clear_mode(curbuf, mode, local, abbr);
+}
+
+/*
+ * If "map_locked" is set then give an error and return TRUE.
+ * Otherwise return FALSE.
+ */
+    static int
+is_map_locked(void)
+{
+    if (map_locked > 0)
+    {
+	emsg(_(e_cannot_change_mappings_while_listing));
+	return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * Clear all mappings in "mode".
+ */
+    void
+map_clear_mode(
+    buf_T	*buf,		// buffer for local mappings
+    int		mode,		// mode in which to delete
+    int		local,		// TRUE for buffer-local mappings
+    int		abbr)		// TRUE for abbreviations
+{
+    mapblock_T	*mp, **mpp;
+    int		hash;
+    int		new_hash;
+
+    if (is_map_locked())
+	return;
+
+    validate_maphash();
+
+    for (hash = 0; hash < 256; ++hash)
+    {
+	if (abbr)
+	{
+	    if (hash > 0)	// there is only one abbrlist
+		break;
+	    if (local)
+		mpp = &buf->b_first_abbr;
+	    else
+		mpp = &first_abbr;
+	}
+	else
+	{
+	    if (local)
+		mpp = &buf->b_maphash[hash];
+	    else
+		mpp = &maphash[hash];
+	}
+	while (*mpp != NULL)
+	{
+	    mp = *mpp;
+	    if (mp->m_mode & mode)
+	    {
+		mp->m_mode &= ~mode;
+		if (mp->m_mode == 0) // entry can be deleted
+		{
+		    map_free(mpp);
+		    continue;
+		}
+		// May need to put this entry into another hash list.
+		new_hash = MAP_HASH(mp->m_mode, mp->m_keys[0]);
+		if (!abbr && new_hash != hash)
+		{
+		    *mpp = mp->m_next;
+		    if (local)
+		    {
+			mp->m_next = buf->b_maphash[new_hash];
+			buf->b_maphash[new_hash] = mp;
+		    }
+		    else
+		    {
+			mp->m_next = maphash[new_hash];
+			maphash[new_hash] = mp;
+		    }
+		    continue;		// continue with *mpp
+		}
+	    }
+	    mpp = &(mp->m_next);
+	}
+    }
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+    int
+mode_str2flags(char_u *modechars)
+{
+    int		mode = 0;
+
+    if (vim_strchr(modechars, 'n') != NULL)
+	mode |= MODE_NORMAL;
+    if (vim_strchr(modechars, 'v') != NULL)
+	mode |= MODE_VISUAL | MODE_SELECT;
+    if (vim_strchr(modechars, 'x') != NULL)
+	mode |= MODE_VISUAL;
+    if (vim_strchr(modechars, 's') != NULL)
+	mode |= MODE_SELECT;
+    if (vim_strchr(modechars, 'o') != NULL)
+	mode |= MODE_OP_PENDING;
+    if (vim_strchr(modechars, 'i') != NULL)
+	mode |= MODE_INSERT;
+    if (vim_strchr(modechars, 'l') != NULL)
+	mode |= MODE_LANGMAP;
+    if (vim_strchr(modechars, 'c') != NULL)
+	mode |= MODE_CMDLINE;
+
+    return mode;
+}
+
+/*
+ * Return TRUE if a map exists that has "str" in the rhs for mode "modechars".
+ * Recognize termcap codes in "str".
+ * Also checks mappings local to the current buffer.
+ */
+    int
+map_to_exists(char_u *str, char_u *modechars, int abbr)
+{
+    char_u	*rhs;
+    char_u	*buf;
+    int		retval;
+
+    rhs = replace_termcodes(str, &buf, REPTERM_DO_LT, NULL);
+
+    retval = map_to_exists_mode(rhs, mode_str2flags(modechars), abbr);
+    vim_free(buf);
+
+    return retval;
+}
+#endif
+
+/*
+ * Return TRUE if a map exists that has "str" in the rhs for mode "mode".
+ * Also checks mappings local to the current buffer.
+ */
+    int
+map_to_exists_mode(char_u *rhs, int mode, int abbr)
+{
+    mapblock_T	*mp;
+    int		hash;
+    int		exp_buffer = FALSE;
+
+    validate_maphash();
+
+    // Do it twice: once for global maps and once for local maps.
+    for (;;)
+    {
+	for (hash = 0; hash < 256; ++hash)
+	{
+	    if (abbr)
+	    {
+		if (hash > 0)		// there is only one abbr list
+		    break;
+		if (exp_buffer)
+		    mp = curbuf->b_first_abbr;
+		else
+		    mp = first_abbr;
+	    }
+	    else if (exp_buffer)
+		mp = curbuf->b_maphash[hash];
+	    else
+		mp = maphash[hash];
+	    for (; mp; mp = mp->m_next)
+	    {
+		if ((mp->m_mode & mode)
+			&& strstr((char *)mp->m_str, (char *)rhs) != NULL)
+		    return TRUE;
+	    }
+	}
+	if (exp_buffer)
+	    break;
+	exp_buffer = TRUE;
+    }
+
+    return FALSE;
+}
+
+/*
+ * Used below when expanding mapping/abbreviation names.
+ */
+static int	expand_mapmodes = 0;
+static int	expand_isabbrev = 0;
+static int	expand_buffer = FALSE;
+
+/*
+ * Translate an internal mapping/abbreviation representation into the
+ * corresponding external one recognized by :map/:abbrev commands.
+ * Respects the current B/k/< settings of 'cpoption'.
+ *
+ * This function is called when expanding mappings/abbreviations on the
+ * command-line.
+ *
+ * It uses a growarray to build the translation string since the latter can be
+ * wider than the original description. The caller has to free the string
+ * afterwards.
+ *
+ * Returns NULL when there is a problem.
+ */
+    static char_u *
+translate_mapping(char_u *str)
+{
+    garray_T	ga;
+    int		c;
+    int		modifiers;
+    int		cpo_bslash;
+    int		cpo_special;
+
+    ga_init(&ga);
+    ga.ga_itemsize = 1;
+    ga.ga_growsize = 40;
+
+    cpo_bslash = (vim_strchr(p_cpo, CPO_BSLASH) != NULL);
+    cpo_special = (vim_strchr(p_cpo, CPO_SPECI) != NULL);
+
+    for (; *str; ++str)
+    {
+	c = *str;
+	if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
+	{
+	    modifiers = 0;
+	    if (str[1] == KS_MODIFIER)
+	    {
+		str++;
+		modifiers = *++str;
+		c = *++str;
+	    }
+	    if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
+	    {
+		if (cpo_special)
+		{
+		    ga_clear(&ga);
+		    return NULL;
+		}
+		c = TO_SPECIAL(str[1], str[2]);
+		if (c == K_ZERO)	// display <Nul> as ^@
+		    c = NUL;
+		str += 2;
+	    }
+	    if (IS_SPECIAL(c) || modifiers)	// special key
+	    {
+		if (cpo_special)
+		{
+		    ga_clear(&ga);
+		    return NULL;
+		}
+		ga_concat(&ga, get_special_key_name(c, modifiers));
+		continue; // for (str)
+	    }
+	}
+	if (c == ' ' || c == '\t' || c == Ctrl_J || c == Ctrl_V
+	    || (c == '<' && !cpo_special) || (c == '\\' && !cpo_bslash))
+	    ga_append(&ga, cpo_bslash ? Ctrl_V : '\\');
+	if (c)
+	    ga_append(&ga, c);
+    }
+    ga_append(&ga, NUL);
+    return (char_u *)(ga.ga_data);
+}
+
+/*
+ * Work out what to complete when doing command line completion of mapping
+ * or abbreviation names.
+ */
+    char_u *
+set_context_in_map_cmd(
+    expand_T	*xp,
+    char_u	*cmd,
+    char_u	*arg,
+    int		forceit,	// TRUE if '!' given
+    int		isabbrev,	// TRUE if abbreviation
+    int		isunmap,	// TRUE if unmap/unabbrev command
+    cmdidx_T	cmdidx)
+{
+    if (forceit && cmdidx != CMD_map && cmdidx != CMD_unmap)
+	xp->xp_context = EXPAND_NOTHING;
+    else
+    {
+	if (isunmap)
+	    expand_mapmodes = get_map_mode(&cmd, forceit || isabbrev);
+	else
+	{
+	    expand_mapmodes = MODE_INSERT | MODE_CMDLINE;
+	    if (!isabbrev)
+		expand_mapmodes += MODE_VISUAL | MODE_SELECT | MODE_NORMAL
+							     | MODE_OP_PENDING;
+	}
+	expand_isabbrev = isabbrev;
+	xp->xp_context = EXPAND_MAPPINGS;
+	expand_buffer = FALSE;
+	for (;;)
+	{
+	    if (STRNCMP(arg, "<buffer>", 8) == 0)
+	    {
+		expand_buffer = TRUE;
+		arg = skipwhite(arg + 8);
+		continue;
+	    }
+	    if (STRNCMP(arg, "<unique>", 8) == 0)
+	    {
+		arg = skipwhite(arg + 8);
+		continue;
+	    }
+	    if (STRNCMP(arg, "<nowait>", 8) == 0)
+	    {
+		arg = skipwhite(arg + 8);
+		continue;
+	    }
+	    if (STRNCMP(arg, "<silent>", 8) == 0)
+	    {
+		arg = skipwhite(arg + 8);
+		continue;
+	    }
+	    if (STRNCMP(arg, "<special>", 9) == 0)
+	    {
+		arg = skipwhite(arg + 9);
+		continue;
+	    }
+#ifdef FEAT_EVAL
+	    if (STRNCMP(arg, "<script>", 8) == 0)
+	    {
+		arg = skipwhite(arg + 8);
+		continue;
+	    }
+	    if (STRNCMP(arg, "<expr>", 6) == 0)
+	    {
+		arg = skipwhite(arg + 6);
+		continue;
+	    }
+#endif
+	    break;
+	}
+	xp->xp_pattern = arg;
+    }
+
+    return NULL;
+}
+
+/*
+ * Find all mapping/abbreviation names that match regexp "regmatch"'.
+ * For command line expansion of ":[un]map" and ":[un]abbrev" in all modes.
+ * Return OK if matches found, FAIL otherwise.
+ */
+    int
+ExpandMappings(
+    char_u	*pat,
+    regmatch_T	*regmatch,
+    int		*numMatches,
+    char_u	***matches)
+{
+    mapblock_T	*mp;
+    garray_T	ga;
+    int		hash;
+    int		count;
+    char_u	*p;
+    int		i;
+    int		fuzzy;
+    int		match;
+    int		score = 0;
+    fuzmatch_str_T  *fuzmatch;
+
+    fuzzy = cmdline_fuzzy_complete(pat);
+
+    validate_maphash();
+
+    *numMatches = 0;		    // return values in case of FAIL
+    *matches = NULL;
+
+    if (!fuzzy)
+	ga_init2(&ga, sizeof(char *), 3);
+    else
+	ga_init2(&ga, sizeof(fuzmatch_str_T), 3);
+
+    // First search in map modifier arguments
+    for (i = 0; i < 7; ++i)
+    {
+	if (i == 0)
+	    p = (char_u *)"<silent>";
+	else if (i == 1)
+	    p = (char_u *)"<unique>";
+#ifdef FEAT_EVAL
+	else if (i == 2)
+	    p = (char_u *)"<script>";
+	else if (i == 3)
+	    p = (char_u *)"<expr>";
+#endif
+	else if (i == 4 && !expand_buffer)
+	    p = (char_u *)"<buffer>";
+	else if (i == 5)
+	    p = (char_u *)"<nowait>";
+	else if (i == 6)
+	    p = (char_u *)"<special>";
+	else
+	    continue;
+
+	if (!fuzzy)
+	    match = vim_regexec(regmatch, p, (colnr_T)0);
+	else
+	{
+	    score = fuzzy_match_str(p, pat);
+	    match = (score != 0);
+	}
+
+	if (!match)
+	    continue;
+
+	if (ga_grow(&ga, 1) == FAIL)
+	    break;
+
+	if (fuzzy)
+	{
+	    fuzmatch = &((fuzmatch_str_T *)ga.ga_data)[ga.ga_len];
+	    fuzmatch->idx = ga.ga_len;
+	    fuzmatch->str = vim_strsave(p);
+	    fuzmatch->score = score;
+	}
+	else
+	    ((char_u **)ga.ga_data)[ga.ga_len] = vim_strsave(p);
+	++ga.ga_len;
+    }
+
+    for (hash = 0; hash < 256; ++hash)
+    {
+	if (expand_isabbrev)
+	{
+	    if (hash > 0)	// only one abbrev list
+		break; // for (hash)
+	    mp = first_abbr;
+	}
+	else if (expand_buffer)
+	    mp = curbuf->b_maphash[hash];
+	else
+	    mp = maphash[hash];
+	for (; mp; mp = mp->m_next)
+	{
+	    if (mp->m_simplified || !(mp->m_mode & expand_mapmodes))
+		continue;
+
+	    p = translate_mapping(mp->m_keys);
+	    if (p == NULL)
+		continue;
+
+	    if (!fuzzy)
+		match = vim_regexec(regmatch, p, (colnr_T)0);
+	    else
+	    {
+		score = fuzzy_match_str(p, pat);
+		match = (score != 0);
+	    }
+
+	    if (!match)
+	    {
+		vim_free(p);
+		continue;
+	    }
+
+	    if (ga_grow(&ga, 1) == FAIL)
+	    {
+		vim_free(p);
+		break;
+	    }
+
+	    if (fuzzy)
+	    {
+		fuzmatch = &((fuzmatch_str_T *)ga.ga_data)[ga.ga_len];
+		fuzmatch->idx = ga.ga_len;
+		fuzmatch->str = p;
+		fuzmatch->score = score;
+	    }
+	    else
+		((char_u **)ga.ga_data)[ga.ga_len] = p;
+
+	    ++ga.ga_len;
+	} // for (mp)
+    } // for (hash)
+
+    if (ga.ga_len == 0)
+	return FAIL;
+
+    if (!fuzzy)
+    {
+	*matches = ga.ga_data;
+	*numMatches = ga.ga_len;
+    }
+    else
+    {
+	if (fuzzymatches_to_strmatches(ga.ga_data, matches, ga.ga_len,
+							FALSE) == FAIL)
+	    return FAIL;
+	*numMatches = ga.ga_len;
+    }
+
+    count = *numMatches;
+    if (count > 1)
+    {
+	char_u	**ptr1;
+	char_u	**ptr2;
+	char_u	**ptr3;
+
+	// Sort the matches
+	// Fuzzy matching already sorts the matches
+	if (!fuzzy)
+	    sort_strings(*matches, count);
+
+	// Remove multiple entries
+	ptr1 = *matches;
+	ptr2 = ptr1 + 1;
+	ptr3 = ptr1 + count;
+
+	while (ptr2 < ptr3)
+	{
+	    if (STRCMP(*ptr1, *ptr2))
+		*++ptr1 = *ptr2++;
+	    else
+	    {
+		vim_free(*ptr2++);
+		count--;
+	    }
+	}
+    }
+
+    *numMatches = count;
+    return (count == 0 ? FAIL : OK);
+}
+
+/*
+ * Check for an abbreviation.
+ * Cursor is at ptr[col].
+ * When inserting, mincol is where insert started.
+ * For the command line, mincol is what is to be skipped over.
+ * "c" is the character typed before check_abbr was called.  It may have
+ * ABBR_OFF added to avoid prepending a CTRL-V to it.
+ *
+ * Historic vi practice: The last character of an abbreviation must be an id
+ * character ([a-zA-Z0-9_]). The characters in front of it must be all id
+ * characters or all non-id characters. This allows for abbr. "#i" to
+ * "#include".
+ *
+ * Vim addition: Allow for abbreviations that end in a non-keyword character.
+ * Then there must be white space before the abbr.
+ *
+ * return TRUE if there is an abbreviation, FALSE if not
+ */
+    int
+check_abbr(
+    int		c,
+    char_u	*ptr,
+    int		col,
+    int		mincol)
+{
+    int		len;
+    int		scol;		// starting column of the abbr.
+    int		j;
+    char_u	*s;
+    char_u	tb[MB_MAXBYTES + 4];
+    mapblock_T	*mp;
+    mapblock_T	*mp2;
+    int		clen = 0;	// length in characters
+    int		is_id = TRUE;
+    int		vim_abbr;
+
+    if (typebuf.tb_no_abbr_cnt)	// abbrev. are not recursive
+	return FALSE;
+
+    // no remapping implies no abbreviation, except for CTRL-]
+    if (noremap_keys() && c != Ctrl_RSB)
+	return FALSE;
+
+    // Check for word before the cursor: If it ends in a keyword char all
+    // chars before it must be keyword chars or non-keyword chars, but not
+    // white space. If it ends in a non-keyword char we accept any characters
+    // before it except white space.
+    if (col == 0)				// cannot be an abbr.
+	return FALSE;
+
+    if (has_mbyte)
+    {
+	char_u *p;
+
+	p = mb_prevptr(ptr, ptr + col);
+	if (!vim_iswordp(p))
+	    vim_abbr = TRUE;			// Vim added abbr.
+	else
+	{
+	    vim_abbr = FALSE;			// vi compatible abbr.
+	    if (p > ptr)
+		is_id = vim_iswordp(mb_prevptr(ptr, p));
+	}
+	clen = 1;
+	while (p > ptr + mincol)
+	{
+	    p = mb_prevptr(ptr, p);
+	    if (vim_isspace(*p) || (!vim_abbr && is_id != vim_iswordp(p)))
+	    {
+		p += (*mb_ptr2len)(p);
+		break;
+	    }
+	    ++clen;
+	}
+	scol = (int)(p - ptr);
+    }
+    else
+    {
+	if (!vim_iswordc(ptr[col - 1]))
+	    vim_abbr = TRUE;			// Vim added abbr.
+	else
+	{
+	    vim_abbr = FALSE;			// vi compatible abbr.
+	    if (col > 1)
+		is_id = vim_iswordc(ptr[col - 2]);
+	}
+	for (scol = col - 1; scol > 0 && !vim_isspace(ptr[scol - 1])
+		&& (vim_abbr || is_id == vim_iswordc(ptr[scol - 1])); --scol)
+	    ;
+    }
+
+    if (scol < mincol)
+	scol = mincol;
+    if (scol < col)		// there is a word in front of the cursor
+    {
+	ptr += scol;
+	len = col - scol;
+	mp = curbuf->b_first_abbr;
+	mp2 = first_abbr;
+	if (mp == NULL)
+	{
+	    mp = mp2;
+	    mp2 = NULL;
+	}
+	for ( ; mp; mp->m_next == NULL
+				  ? (mp = mp2, mp2 = NULL) : (mp = mp->m_next))
+	{
+	    int		qlen = mp->m_keylen;
+	    char_u	*q = mp->m_keys;
+	    int		match;
+
+	    if (vim_strbyte(mp->m_keys, K_SPECIAL) != NULL)
+	    {
+		char_u *qe = vim_strsave(mp->m_keys);
+
+		// might have CSI escaped mp->m_keys
+		if (qe != NULL)
+		{
+		    q = qe;
+		    vim_unescape_csi(q);
+		    qlen = (int)STRLEN(q);
+		}
+	    }
+
+	    // find entries with right mode and keys
+	    match =    (mp->m_mode & State)
+		    && qlen == len
+		    && !STRNCMP(q, ptr, (size_t)len);
+	    if (q != mp->m_keys)
+		vim_free(q);
+	    if (match)
+		break;
+	}
+	if (mp != NULL)
+	{
+	    int	noremap;
+	    int silent;
+#ifdef FEAT_EVAL
+	    int expr;
+#endif
+
+	    // Found a match:
+	    // Insert the rest of the abbreviation in typebuf.tb_buf[].
+	    // This goes from end to start.
+	    //
+	    // Characters 0x000 - 0x100: normal chars, may need CTRL-V,
+	    // except K_SPECIAL: Becomes K_SPECIAL KS_SPECIAL KE_FILLER
+	    // Characters where IS_SPECIAL() == TRUE: key codes, need
+	    // K_SPECIAL. Other characters (with ABBR_OFF): don't use CTRL-V.
+	    //
+	    // Character CTRL-] is treated specially - it completes the
+	    // abbreviation, but is not inserted into the input stream.
+	    j = 0;
+	    if (c != Ctrl_RSB)
+	    {
+					// special key code, split up
+		if (IS_SPECIAL(c) || c == K_SPECIAL)
+		{
+		    tb[j++] = K_SPECIAL;
+		    tb[j++] = K_SECOND(c);
+		    tb[j++] = K_THIRD(c);
+		}
+		else
+		{
+		    if (c < ABBR_OFF && (c < ' ' || c > '~'))
+			tb[j++] = Ctrl_V;	// special char needs CTRL-V
+		    if (has_mbyte)
+		    {
+			int	newlen;
+			char_u	*escaped;
+
+			// if ABBR_OFF has been added, remove it here
+			if (c >= ABBR_OFF)
+			    c -= ABBR_OFF;
+			newlen = (*mb_char2bytes)(c, tb + j);
+			tb[j + newlen] = NUL;
+			// Need to escape K_SPECIAL.
+			escaped = vim_strsave_escape_csi(tb + j);
+			if (escaped != NULL)
+			{
+			    newlen = (int)STRLEN(escaped);
+			    mch_memmove(tb + j, escaped, newlen);
+			    j += newlen;
+			    vim_free(escaped);
+			}
+		    }
+		    else
+			tb[j++] = c;
+		}
+		tb[j] = NUL;
+					// insert the last typed char
+		(void)ins_typebuf(tb, 1, 0, TRUE, mp->m_silent);
+	    }
+
+	    // copy values here, calling eval_map_expr() may make "mp" invalid!
+	    noremap = mp->m_noremap;
+	    silent = mp->m_silent;
+#ifdef FEAT_EVAL
+	    expr = mp->m_expr;
+
+	    if (expr)
+		s = eval_map_expr(mp, c);
+	    else
+#endif
+		s = mp->m_str;
+	    if (s != NULL)
+	    {
+					// insert the to string
+		(void)ins_typebuf(s, noremap, 0, TRUE, silent);
+					// no abbrev. for these chars
+		typebuf.tb_no_abbr_cnt += (int)STRLEN(s) + j + 1;
+#ifdef FEAT_EVAL
+		if (expr)
+		    vim_free(s);
+#endif
+	    }
+
+	    tb[0] = Ctrl_H;
+	    tb[1] = NUL;
+	    if (has_mbyte)
+		len = clen;	// Delete characters instead of bytes
+	    while (len-- > 0)		// delete the from string
+		(void)ins_typebuf(tb, 1, 0, TRUE, silent);
+	    return TRUE;
+	}
+    }
+    return FALSE;
+}
+
+#ifdef FEAT_EVAL
+/*
+ * Evaluate the RHS of a mapping or abbreviations and take care of escaping
+ * special characters.
+ * Careful: after this "mp" will be invalid if the mapping was deleted.
+ */
+    char_u *
+eval_map_expr(
+    mapblock_T	*mp,
+    int		c)	    // NUL or typed character for abbreviation
+{
+    char_u	*res;
+    char_u	*p;
+    char_u	*expr;
+    pos_T	save_cursor;
+    int		save_msg_col;
+    int		save_msg_row;
+    scid_T	save_sctx_sid = current_sctx.sc_sid;
+    int		save_sctx_version = current_sctx.sc_version;
+
+    // Remove escaping of CSI, because "str" is in a format to be used as
+    // typeahead.
+    expr = vim_strsave(mp->m_str);
+    if (expr == NULL)
+	return NULL;
+    vim_unescape_csi(expr);
+
+    // Forbid changing text or using ":normal" to avoid most of the bad side
+    // effects.  Also restore the cursor position.
+    ++textlock;
+    ++ex_normal_lock;
+    set_vim_var_char(c);  // set v:char to the typed character
+    save_cursor = curwin->w_cursor;
+    save_msg_col = msg_col;
+    save_msg_row = msg_row;
+    if (mp->m_script_ctx.sc_version == SCRIPT_VERSION_VIM9)
+    {
+	current_sctx.sc_sid = mp->m_script_ctx.sc_sid;
+	current_sctx.sc_version = SCRIPT_VERSION_VIM9;
+    }
+
+    // Note: the evaluation may make "mp" invalid.
+    p = eval_to_string(expr, FALSE, FALSE);
+
+    --textlock;
+    --ex_normal_lock;
+    curwin->w_cursor = save_cursor;
+    msg_col = save_msg_col;
+    msg_row = save_msg_row;
+    current_sctx.sc_sid = save_sctx_sid;
+    current_sctx.sc_version = save_sctx_version;
+
+    vim_free(expr);
+
+    if (p == NULL)
+	return NULL;
+    // Escape CSI in the result to be able to use the string as typeahead.
+    res = vim_strsave_escape_csi(p);
+    vim_free(p);
+
+    return res;
+}
+#endif
+
+/*
+ * Copy "p" to allocated memory, escaping K_SPECIAL and CSI so that the result
+ * can be put in the typeahead buffer.
+ * Returns NULL when out of memory.
+ */
+    char_u *
+vim_strsave_escape_csi(char_u *p)
+{
+    char_u	*res;
+    char_u	*s, *d;
+
+    // Need a buffer to hold up to three times as much.  Four in case of an
+    // illegal utf-8 byte:
+    // 0xc0 -> 0xc3 0x80 -> 0xc3 K_SPECIAL KS_SPECIAL KE_FILLER
+    res = alloc(STRLEN(p) * 4 + 1);
+    if (res == NULL)
+	return NULL;
+
+    d = res;
+    for (s = p; *s != NUL; )
+    {
+	if ((s[0] == K_SPECIAL
+#ifdef FEAT_GUI
+		    || (gui.in_use && s[0] == CSI)
+#endif
+	    ) && s[1] != NUL && s[2] != NUL)
+	{
+	    // Copy special key unmodified.
+	    *d++ = *s++;
+	    *d++ = *s++;
+	    *d++ = *s++;
+	}
+	else
+	{
+	    // Add character, possibly multi-byte to destination, escaping
+	    // CSI and K_SPECIAL. Be careful, it can be an illegal byte!
+	    d = add_char2buf(PTR2CHAR(s), d);
+	    s += MB_CPTR2LEN(s);
+	}
+    }
+    *d = NUL;
+
+    return res;
+}
+
+/*
+ * Remove escaping from CSI and K_SPECIAL characters.  Reverse of
+ * vim_strsave_escape_csi().  Works in-place.
+ */
+    void
+vim_unescape_csi(char_u *p)
+{
+    char_u	*s = p, *d = p;
+
+    while (*s != NUL)
+    {
+	if (s[0] == K_SPECIAL && s[1] == KS_SPECIAL && s[2] == KE_FILLER)
+	{
+	    *d++ = K_SPECIAL;
+	    s += 3;
+	}
+	else if ((s[0] == K_SPECIAL || s[0] == CSI)
+				   && s[1] == KS_EXTRA && s[2] == (int)KE_CSI)
+	{
+	    *d++ = CSI;
+	    s += 3;
+	}
+	else
+	    *d++ = *s++;
+    }
+    *d = NUL;
+}
+
+/*
+ * Write map commands for the current mappings to an .exrc file.
+ * Return FAIL on error, OK otherwise.
+ */
+    int
+makemap(
+    FILE	*fd,
+    buf_T	*buf)	    // buffer for local mappings or NULL
+{
+    mapblock_T	*mp;
+    char_u	c1, c2, c3;
+    char_u	*p;
+    char	*cmd;
+    int		abbr;
+    int		hash;
+    int		did_cpo = FALSE;
+    int		i;
+
+    validate_maphash();
+
+    // Do the loop twice: Once for mappings, once for abbreviations.
+    // Then loop over all map hash lists.
+    for (abbr = 0; abbr < 2; ++abbr)
+	for (hash = 0; hash < 256; ++hash)
+	{
+	    if (abbr)
+	    {
+		if (hash > 0)		// there is only one abbr list
+		    break;
+		if (buf != NULL)
+		    mp = buf->b_first_abbr;
+		else
+		    mp = first_abbr;
+	    }
+	    else
+	    {
+		if (buf != NULL)
+		    mp = buf->b_maphash[hash];
+		else
+		    mp = maphash[hash];
+	    }
+
+	    for ( ; mp; mp = mp->m_next)
+	    {
+		// skip script-local mappings
+		if (mp->m_noremap == REMAP_SCRIPT)
+		    continue;
+
+		// skip mappings that contain a <SNR> (script-local thing),
+		// they probably don't work when loaded again
+		for (p = mp->m_str; *p != NUL; ++p)
+		    if (p[0] == K_SPECIAL && p[1] == KS_EXTRA
+						       && p[2] == (int)KE_SNR)
+			break;
+		if (*p != NUL)
+		    continue;
+
+		// It's possible to create a mapping and then ":unmap" certain
+		// modes.  We recreate this here by mapping the individual
+		// modes, which requires up to three of them.
+		c1 = NUL;
+		c2 = NUL;
+		c3 = NUL;
+		if (abbr)
+		    cmd = "abbr";
+		else
+		    cmd = "map";
+		switch (mp->m_mode)
+		{
+		    case MODE_NORMAL | MODE_VISUAL | MODE_SELECT
+							     | MODE_OP_PENDING:
+			break;
+		    case MODE_NORMAL:
+			c1 = 'n';
+			break;
+		    case MODE_VISUAL:
+			c1 = 'x';
+			break;
+		    case MODE_SELECT:
+			c1 = 's';
+			break;
+		    case MODE_OP_PENDING:
+			c1 = 'o';
+			break;
+		    case MODE_NORMAL | MODE_VISUAL:
+			c1 = 'n';
+			c2 = 'x';
+			break;
+		    case MODE_NORMAL | MODE_SELECT:
+			c1 = 'n';
+			c2 = 's';
+			break;
+		    case MODE_NORMAL | MODE_OP_PENDING:
+			c1 = 'n';
+			c2 = 'o';
+			break;
+		    case MODE_VISUAL | MODE_SELECT:
+			c1 = 'v';
+			break;
+		    case MODE_VISUAL | MODE_OP_PENDING:
+			c1 = 'x';
+			c2 = 'o';
+			break;
+		    case MODE_SELECT | MODE_OP_PENDING:
+			c1 = 's';
+			c2 = 'o';
+			break;
+		    case MODE_NORMAL | MODE_VISUAL | MODE_SELECT:
+			c1 = 'n';
+			c2 = 'v';
+			break;
+		    case MODE_NORMAL | MODE_VISUAL | MODE_OP_PENDING:
+			c1 = 'n';
+			c2 = 'x';
+			c3 = 'o';
+			break;
+		    case MODE_NORMAL | MODE_SELECT | MODE_OP_PENDING:
+			c1 = 'n';
+			c2 = 's';
+			c3 = 'o';
+			break;
+		    case MODE_VISUAL | MODE_SELECT | MODE_OP_PENDING:
+			c1 = 'v';
+			c2 = 'o';
+			break;
+		    case MODE_CMDLINE | MODE_INSERT:
+			if (!abbr)
+			    cmd = "map!";
+			break;
+		    case MODE_CMDLINE:
+			c1 = 'c';
+			break;
+		    case MODE_INSERT:
+			c1 = 'i';
+			break;
+		    case MODE_LANGMAP:
+			c1 = 'l';
+			break;
+		    case MODE_TERMINAL:
+			c1 = 't';
+			break;
+		    default:
+			iemsg(_(e_makemap_illegal_mode));
+			return FAIL;
+		}
+		do	// do this twice if c2 is set, 3 times with c3
+		{
+		    // When outputting <> form, need to make sure that 'cpo'
+		    // is set to the Vim default.
+		    if (!did_cpo)
+		    {
+			if (*mp->m_str == NUL)		// will use <Nop>
+			    did_cpo = TRUE;
+			else
+			    for (i = 0; i < 2; ++i)
+				for (p = (i ? mp->m_str : mp->m_keys); *p; ++p)
+				    if (*p == K_SPECIAL || *p == NL)
+					did_cpo = TRUE;
+			if (did_cpo)
+			{
+			    if (fprintf(fd, "let s:cpo_save=&cpo") < 0
+				    || put_eol(fd) < 0
+				    || fprintf(fd, "set cpo&vim") < 0
+				    || put_eol(fd) < 0)
+				return FAIL;
+			}
+		    }
+		    if (c1 && putc(c1, fd) < 0)
+			return FAIL;
+		    if (mp->m_noremap != REMAP_YES && fprintf(fd, "nore") < 0)
+			return FAIL;
+		    if (fputs(cmd, fd) < 0)
+			return FAIL;
+		    if (buf != NULL && fputs(" <buffer>", fd) < 0)
+			return FAIL;
+		    if (mp->m_nowait && fputs(" <nowait>", fd) < 0)
+			return FAIL;
+		    if (mp->m_silent && fputs(" <silent>", fd) < 0)
+			return FAIL;
+#ifdef FEAT_EVAL
+		    if (mp->m_noremap == REMAP_SCRIPT
+						 && fputs("<script>", fd) < 0)
+			return FAIL;
+		    if (mp->m_expr && fputs(" <expr>", fd) < 0)
+			return FAIL;
+#endif
+
+		    if (       putc(' ', fd) < 0
+			    || put_escstr(fd, mp->m_keys, 0) == FAIL
+			    || putc(' ', fd) < 0
+			    || put_escstr(fd, mp->m_str, 1) == FAIL
+			    || put_eol(fd) < 0)
+			return FAIL;
+		    c1 = c2;
+		    c2 = c3;
+		    c3 = NUL;
+		} while (c1 != NUL);
+	    }
+	}
+
+    if (did_cpo)
+	if (fprintf(fd, "let &cpo=s:cpo_save") < 0
+		|| put_eol(fd) < 0
+		|| fprintf(fd, "unlet s:cpo_save") < 0
+		|| put_eol(fd) < 0)
+	    return FAIL;
+    return OK;
+}
+
+/*
+ * write escape string to file
+ * "what": 0 for :map lhs, 1 for :map rhs, 2 for :set
+ *
+ * return FAIL for failure, OK otherwise
+ */
+    int
+put_escstr(FILE *fd, char_u *strstart, int what)
+{
+    char_u	*str = strstart;
+    int		c;
+    int		modifiers;
+
+    // :map xx <Nop>
+    if (*str == NUL && what == 1)
+    {
+	if (fprintf(fd, "<Nop>") < 0)
+	    return FAIL;
+	return OK;
+    }
+
+    for ( ; *str != NUL; ++str)
+    {
+	char_u	*p;
+
+	// Check for a multi-byte character, which may contain escaped
+	// K_SPECIAL and CSI bytes
+	p = mb_unescape(&str);
+	if (p != NULL)
+	{
+	    while (*p != NUL)
+		if (fputc(*p++, fd) < 0)
+		    return FAIL;
+	    --str;
+	    continue;
+	}
+
+	c = *str;
+	// Special key codes have to be translated to be able to make sense
+	// when they are read back.
+	if (c == K_SPECIAL && what != 2)
+	{
+	    modifiers = 0;
+	    if (str[1] == KS_MODIFIER)
+	    {
+		modifiers = str[2];
+		str += 3;
+		c = *str;
+	    }
+	    if (c == K_SPECIAL)
+	    {
+		c = TO_SPECIAL(str[1], str[2]);
+		str += 2;
+	    }
+	    if (IS_SPECIAL(c) || modifiers)	// special key
+	    {
+		if (fputs((char *)get_special_key_name(c, modifiers), fd) < 0)
+		    return FAIL;
+		continue;
+	    }
+	}
+
+	// A '\n' in a map command should be written as <NL>.
+	// A '\n' in a set command should be written as \^V^J.
+	if (c == NL)
+	{
+	    if (what == 2)
+	    {
+		if (fprintf(fd, "\\\026\n") < 0)
+		    return FAIL;
+	    }
+	    else
+	    {
+		if (fprintf(fd, "<NL>") < 0)
+		    return FAIL;
+	    }
+	    continue;
+	}
+
+	// Some characters have to be escaped with CTRL-V to
+	// prevent them from misinterpreted in DoOneCmd().
+	// A space, Tab and '"' has to be escaped with a backslash to
+	// prevent it to be misinterpreted in do_set().
+	// A space has to be escaped with a CTRL-V when it's at the start of a
+	// ":map" rhs.
+	// A '<' has to be escaped with a CTRL-V to prevent it being
+	// interpreted as the start of a special key name.
+	// A space in the lhs of a :map needs a CTRL-V.
+	if (what == 2 && (VIM_ISWHITE(c) || c == '"' || c == '\\'))
+	{
+	    if (putc('\\', fd) < 0)
+		return FAIL;
+	}
+	else if (c < ' ' || c > '~' || c == '|'
+		|| (what == 0 && c == ' ')
+		|| (what == 1 && str == strstart && c == ' ')
+		|| (what != 2 && c == '<'))
+	{
+	    if (putc(Ctrl_V, fd) < 0)
+		return FAIL;
+	}
+	if (putc(c, fd) < 0)
+	    return FAIL;
+    }
+    return OK;
+}
+
+/*
+ * Check all mappings for the presence of special key codes.
+ * Used after ":set term=xxx".
+ */
+    void
+check_map_keycodes(void)
+{
+    mapblock_T	*mp;
+    char_u	*p;
+    int		i;
+    char_u	buf[3];
+    int		abbr;
+    int		hash;
+    buf_T	*bp;
+    ESTACK_CHECK_DECLARATION
+
+    validate_maphash();
+    // avoids giving error messages
+    estack_push(ETYPE_INTERNAL, (char_u *)"mappings", 0);
+    ESTACK_CHECK_SETUP
+
+    // Do this once for each buffer, and then once for global
+    // mappings/abbreviations with bp == NULL
+    for (bp = firstbuf; ; bp = bp->b_next)
+    {
+	// Do the loop twice: Once for mappings, once for abbreviations.
+	// Then loop over all map hash lists.
+	for (abbr = 0; abbr <= 1; ++abbr)
+	    for (hash = 0; hash < 256; ++hash)
+	    {
+		if (abbr)
+		{
+		    if (hash)	    // there is only one abbr list
+			break;
+		    if (bp != NULL)
+			mp = bp->b_first_abbr;
+		    else
+			mp = first_abbr;
+		}
+		else
+		{
+		    if (bp != NULL)
+			mp = bp->b_maphash[hash];
+		    else
+			mp = maphash[hash];
+		}
+		for ( ; mp != NULL; mp = mp->m_next)
+		{
+		    for (i = 0; i <= 1; ++i)	// do this twice
+		    {
+			if (i == 0)
+			    p = mp->m_keys;	// once for the "from" part
+			else
+			    p = mp->m_str;	// and once for the "to" part
+			while (*p)
+			{
+			    if (*p == K_SPECIAL)
+			    {
+				++p;
+				if (*p < 128)   // for "normal" tcap entries
+				{
+				    buf[0] = p[0];
+				    buf[1] = p[1];
+				    buf[2] = NUL;
+				    (void)add_termcap_entry(buf, FALSE);
+				}
+				++p;
+			    }
+			    ++p;
+			}
+		    }
+		}
+	    }
+	if (bp == NULL)
+	    break;
+    }
+    ESTACK_CHECK_NOW
+    estack_pop();
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Check the string "keys" against the lhs of all mappings.
+ * Return pointer to rhs of mapping (mapblock->m_str).
+ * NULL when no mapping found.
+ */
+    char_u *
+check_map(
+    char_u	*keys,
+    int		mode,
+    int		exact,		// require exact match
+    int		ign_mod,	// ignore preceding modifier
+    int		abbr,		// do abbreviations
+    mapblock_T	**mp_ptr,	// return: pointer to mapblock or NULL
+    int		*local_ptr)	// return: buffer-local mapping or NULL
+{
+    int		hash;
+    int		len, minlen;
+    mapblock_T	*mp;
+    char_u	*s;
+    int		local;
+
+    validate_maphash();
+
+    len = (int)STRLEN(keys);
+    for (local = 1; local >= 0; --local)
+	// loop over all hash lists
+	for (hash = 0; hash < 256; ++hash)
+	{
+	    if (abbr)
+	    {
+		if (hash > 0)		// there is only one list.
+		    break;
+		if (local)
+		    mp = curbuf->b_first_abbr;
+		else
+		    mp = first_abbr;
+	    }
+	    else if (local)
+		mp = curbuf->b_maphash[hash];
+	    else
+		mp = maphash[hash];
+	    for ( ; mp != NULL; mp = mp->m_next)
+	    {
+		// skip entries with wrong mode, wrong length and not matching
+		// ones
+		if ((mp->m_mode & mode) && (!exact || mp->m_keylen == len))
+		{
+		    if (len > mp->m_keylen)
+			minlen = mp->m_keylen;
+		    else
+			minlen = len;
+		    s = mp->m_keys;
+		    if (ign_mod && s[0] == K_SPECIAL && s[1] == KS_MODIFIER
+							       && s[2] != NUL)
+		    {
+			s += 3;
+			if (len > mp->m_keylen - 3)
+			    minlen = mp->m_keylen - 3;
+		    }
+		    if (STRNCMP(s, keys, minlen) == 0)
+		    {
+			if (mp_ptr != NULL)
+			    *mp_ptr = mp;
+			if (local_ptr != NULL)
+			    *local_ptr = local;
+			return mp->m_str;
+		    }
+		}
+	    }
+	}
+
+    return NULL;
+}
+
+/*
+ * "hasmapto()" function
+ */
+    void
+f_hasmapto(typval_T *argvars, typval_T *rettv)
+{
+    char_u	*name;
+    char_u	*mode;
+    char_u	buf[NUMBUFLEN];
+    int		abbr = FALSE;
+
+    if (in_vim9script()
+	    && (check_for_string_arg(argvars, 0) == FAIL
+		|| check_for_opt_string_arg(argvars, 1) == FAIL
+		|| (argvars[1].v_type != VAR_UNKNOWN
+		    && check_for_opt_bool_arg(argvars, 2) == FAIL)))
+	return;
+
+    name = tv_get_string(&argvars[0]);
+    if (argvars[1].v_type == VAR_UNKNOWN)
+	mode = (char_u *)"nvo";
+    else
+    {
+	mode = tv_get_string_buf(&argvars[1], buf);
+	if (argvars[2].v_type != VAR_UNKNOWN)
+	    abbr = (int)tv_get_bool(&argvars[2]);
+    }
+
+    if (map_to_exists(name, mode, abbr))
+	rettv->vval.v_number = TRUE;
+    else
+	rettv->vval.v_number = FALSE;
+}
+
+/*
+ * Fill in the empty dictionary with items as defined by maparg builtin.
+ */
+    static void
+mapblock2dict(
+	mapblock_T  *mp,
+	dict_T	    *dict,
+	char_u	    *lhsrawalt,	    // may be NULL
+	int	    buffer_local,   // false if not buffer local mapping
+	int	    abbr)	    // true if abbreviation
+{
+    char_u	    *lhs = str2special_save(mp->m_keys, TRUE, FALSE);
+    char_u	    *mapmode = map_mode_to_chars(mp->m_mode);
+
+    dict_add_string(dict, "lhs", lhs);
+    vim_free(lhs);
+    dict_add_string(dict, "lhsraw", mp->m_keys);
+    if (lhsrawalt)
+	// Also add the value for the simplified entry.
+	dict_add_string(dict, "lhsrawalt", lhsrawalt);
+    dict_add_string(dict, "rhs", mp->m_orig_str);
+    dict_add_number(dict, "noremap", mp->m_noremap ? 1L : 0L);
+    dict_add_number(dict, "script", mp->m_noremap == REMAP_SCRIPT
+		    ? 1L : 0L);
+    dict_add_number(dict, "expr", mp->m_expr ? 1L : 0L);
+    dict_add_number(dict, "silent", mp->m_silent ? 1L : 0L);
+    dict_add_number(dict, "sid", (long)mp->m_script_ctx.sc_sid);
+    dict_add_number(dict, "scriptversion",
+		    (long)mp->m_script_ctx.sc_version);
+    dict_add_number(dict, "lnum", (long)mp->m_script_ctx.sc_lnum);
+    dict_add_number(dict, "buffer", (long)buffer_local);
+    dict_add_number(dict, "nowait", mp->m_nowait ? 1L : 0L);
+    dict_add_string(dict, "mode", mapmode);
+    dict_add_number(dict, "abbr", abbr ? 1L : 0L);
+    dict_add_number(dict, "mode_bits", mp->m_mode);
+
+    vim_free(mapmode);
+}
+
+    static void
+get_maparg(typval_T *argvars, typval_T *rettv, int exact)
+{
+    char_u	*keys;
+    char_u	*keys_simplified;
+    char_u	*which;
+    char_u	buf[NUMBUFLEN];
+    char_u	*keys_buf = NULL;
+    char_u	*alt_keys_buf = NULL;
+    int		did_simplify = FALSE;
+    char_u	*rhs;
+    int		mode;
+    int		abbr = FALSE;
+    int		get_dict = FALSE;
+    mapblock_T	*mp = NULL;
+    int		buffer_local;
+    int		flags = REPTERM_FROM_PART | REPTERM_DO_LT;
+
+    // return empty string for failure
+    rettv->v_type = VAR_STRING;
+    rettv->vval.v_string = NULL;
+
+    keys = tv_get_string(&argvars[0]);
+    if (*keys == NUL)
+	return;
+
+    if (argvars[1].v_type != VAR_UNKNOWN)
+    {
+	which = tv_get_string_buf_chk(&argvars[1], buf);
+	if (argvars[2].v_type != VAR_UNKNOWN)
+	{
+	    abbr = (int)tv_get_bool(&argvars[2]);
+	    if (argvars[3].v_type != VAR_UNKNOWN)
+		get_dict = (int)tv_get_bool(&argvars[3]);
+	}
+    }
+    else
+	which = (char_u *)"";
+    if (which == NULL)
+	return;
+
+    mode = get_map_mode(&which, 0);
+
+    keys_simplified = replace_termcodes(keys, &keys_buf, flags, &did_simplify);
+    rhs = check_map(keys_simplified, mode, exact, FALSE, abbr,
+							   &mp, &buffer_local);
+    if (did_simplify)
+    {
+	// When the lhs is being simplified the not-simplified keys are
+	// preferred for printing, like in do_map().
+	(void)replace_termcodes(keys, &alt_keys_buf,
+					flags | REPTERM_NO_SIMPLIFY, NULL);
+	rhs = check_map(alt_keys_buf, mode, exact, FALSE, abbr, &mp,
+								&buffer_local);
+    }
+
+    if (!get_dict)
+    {
+	// Return a string.
+	if (rhs != NULL)
+	{
+	    if (*rhs == NUL)
+		rettv->vval.v_string = vim_strsave((char_u *)"<Nop>");
+	    else
+		rettv->vval.v_string = str2special_save(rhs, FALSE, FALSE);
+	}
+
+    }
+    else if (rettv_dict_alloc(rettv) == OK && rhs != NULL)
+	mapblock2dict(mp, rettv->vval.v_dict,
+			  did_simplify ? keys_simplified : NULL,
+			  buffer_local, abbr);
+
+    vim_free(keys_buf);
+    vim_free(alt_keys_buf);
+}
+
+/*
+ * "maplist()" function
+ */
+    void
+f_maplist(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    dict_T	*d;
+    mapblock_T	*mp;
+    int		buffer_local;
+    char_u	*keys_buf;
+    int		did_simplify;
+    int		hash;
+    char_u	*lhs;
+    const int	flags = REPTERM_FROM_PART | REPTERM_DO_LT;
+    int		abbr = FALSE;
+
+    if (in_vim9script() && check_for_opt_bool_arg(argvars, 0) == FAIL)
+	return;
+    if (argvars[0].v_type != VAR_UNKNOWN)
+	abbr = tv_get_bool(&argvars[0]);
+
+    if (rettv_list_alloc(rettv) == FAIL)
+	return;
+
+    validate_maphash();
+
+    // Do it twice: once for global maps and once for local maps.
+    for (buffer_local = 0; buffer_local <= 1; ++buffer_local)
+    {
+	for (hash = 0; hash < 256; ++hash)
+	{
+	    if (abbr)
+	    {
+		if (hash > 0)		// there is only one abbr list
+		    break;
+		if (buffer_local)
+		    mp = curbuf->b_first_abbr;
+		else
+		    mp = first_abbr;
+	    }
+	    else if (buffer_local)
+		mp = curbuf->b_maphash[hash];
+	    else
+		mp = maphash[hash];
+	    for (; mp; mp = mp->m_next)
+	    {
+		if (mp->m_simplified)
+		    continue;
+		if ((d = dict_alloc()) == NULL)
+		    return;
+		if (list_append_dict(rettv->vval.v_list, d) == FAIL)
+		    return;
+
+		keys_buf = NULL;
+		did_simplify = FALSE;
+
+		lhs = str2special_save(mp->m_keys, TRUE, FALSE);
+		(void)replace_termcodes(lhs, &keys_buf, flags, &did_simplify);
+		vim_free(lhs);
+
+		mapblock2dict(mp, d,
+				 did_simplify ? keys_buf : NULL,
+				 buffer_local, abbr);
+		vim_free(keys_buf);
+	    }
+	}
+    }
+}
+
+/*
+ * "maparg()" function
+ */
+    void
+f_maparg(typval_T *argvars, typval_T *rettv)
+{
+    if (in_vim9script()
+	    && (check_for_string_arg(argvars, 0) == FAIL
+		|| check_for_opt_string_arg(argvars, 1) == FAIL
+		|| (argvars[1].v_type != VAR_UNKNOWN
+		    && (check_for_opt_bool_arg(argvars, 2) == FAIL
+			|| (argvars[2].v_type != VAR_UNKNOWN
+			    && check_for_opt_bool_arg(argvars, 3) == FAIL)))))
+		return;
+
+    get_maparg(argvars, rettv, TRUE);
+}
+
+/*
+ * "mapcheck()" function
+ */
+    void
+f_mapcheck(typval_T *argvars, typval_T *rettv)
+{
+    if (in_vim9script()
+	    && (check_for_string_arg(argvars, 0) == FAIL
+		|| check_for_opt_string_arg(argvars, 1) == FAIL
+		|| (argvars[1].v_type != VAR_UNKNOWN
+		    && check_for_opt_bool_arg(argvars, 2) == FAIL)))
+	return;
+
+    get_maparg(argvars, rettv, FALSE);
+}
+
+/*
+ * Get the mapping mode from the mode string.
+ * It may contain multiple characters, eg "nox", or "!", or ' '
+ * Return 0 if there is an error.
+ */
+    static int
+get_map_mode_string(char_u *mode_string, int abbr)
+{
+    char_u	*p = mode_string;
+    int		mode = 0;
+    int		tmode;
+    int		modec;
+    const int	MASK_V = MODE_VISUAL | MODE_SELECT;
+    const int	MASK_MAP = MODE_VISUAL | MODE_SELECT | MODE_NORMAL
+							     | MODE_OP_PENDING;
+    const int	MASK_BANG = MODE_INSERT | MODE_CMDLINE;
+
+    if (*p == NUL)
+	p = (char_u *)" ";	// compatibility
+    while ((modec = *p++))
+    {
+	switch (modec)
+	{
+	    case 'i': tmode = MODE_INSERT;	break;
+	    case 'l': tmode = MODE_LANGMAP;	break;
+	    case 'c': tmode = MODE_CMDLINE;	break;
+	    case 'n': tmode = MODE_NORMAL;	break;
+	    case 'x': tmode = MODE_VISUAL;	break;
+	    case 's': tmode = MODE_SELECT;	break;
+	    case 'o': tmode = MODE_OP_PENDING;	break;
+	    case 't': tmode = MODE_TERMINAL;	break;
+	    case 'v': tmode = MASK_V;		break;
+	    case '!': tmode = MASK_BANG;	break;
+	    case ' ': tmode = MASK_MAP;		break;
+	    default:
+		      return 0; // error, unknown mode character
+	}
+	mode |= tmode;
+    }
+    if ((abbr && (mode & ~MASK_BANG) != 0)
+	|| (!abbr && (mode & (mode-1)) != 0 // more than one bit set
+	    && (
+		// false if multiple bits set in mode and mode is fully
+		// contained in one mask
+		!(((mode & MASK_BANG) != 0 && (mode & ~MASK_BANG) == 0)
+		    || ((mode & MASK_MAP) != 0 && (mode & ~MASK_MAP) == 0)))))
+	return 0;
+
+    return mode;
+}
+
+/*
+ * "mapset()" function
+ */
+    void
+f_mapset(typval_T *argvars, typval_T *rettv UNUSED)
+{
+    char_u	*which;
+    int		mode;
+    char_u	buf[NUMBUFLEN];
+    int		is_abbr;
+    dict_T	*d;
+    char_u	*lhs;
+    char_u	*lhsraw;
+    char_u	*lhsrawalt;
+    char_u	*rhs;
+    char_u	*orig_rhs;
+    char_u	*arg_buf = NULL;
+    int		noremap;
+    int		expr;
+    int		silent;
+    int		buffer;
+    scid_T	sid;
+    int		scriptversion;
+    linenr_T	lnum;
+    mapblock_T	**map_table = maphash;
+    mapblock_T  **abbr_table = &first_abbr;
+    int		nowait;
+    char_u	*arg;
+    int		dict_only;
+
+    // If first arg is a dict, then that's the only arg permitted.
+    dict_only = argvars[0].v_type == VAR_DICT;
+    if (in_vim9script()
+	    && (check_for_string_or_dict_arg(argvars, 0) == FAIL
+		|| (dict_only && check_for_unknown_arg(argvars, 1) == FAIL)
+		|| (!dict_only
+		    && (check_for_string_arg(argvars, 0) == FAIL
+			|| check_for_bool_arg(argvars, 1) == FAIL
+			|| check_for_dict_arg(argvars, 2) == FAIL))))
+	return;
+
+    if (dict_only)
+    {
+	d = argvars[0].vval.v_dict;
+	which = dict_get_string(d, "mode", FALSE);
+	is_abbr = dict_get_bool(d, "abbr", -1);
+	if (which == NULL || is_abbr < 0)
+	{
+	    emsg(_(e_entries_missing_in_mapset_dict_argument));
+	    return;
+	}
+    }
+    else
+    {
+	which = tv_get_string_buf_chk(&argvars[0], buf);
+	if (which == NULL)
+	    return;
+	is_abbr = (int)tv_get_bool(&argvars[1]);
+
+	if (check_for_dict_arg(argvars, 2) == FAIL)
+	    return;
+	d = argvars[2].vval.v_dict;
+    }
+    mode = get_map_mode_string(which, is_abbr);
+    if (mode == 0)
+    {
+	semsg(_(e_illegal_map_mode_string_str), which);
+	return;
+    }
+
+
+    // Get the values in the same order as above in get_maparg().
+    lhs = dict_get_string(d, "lhs", FALSE);
+    lhsraw = dict_get_string(d, "lhsraw", FALSE);
+    lhsrawalt = dict_get_string(d, "lhsrawalt", FALSE);
+    rhs = dict_get_string(d, "rhs", FALSE);
+    if (lhs == NULL || lhsraw == NULL || rhs == NULL)
+    {
+	emsg(_(e_entries_missing_in_mapset_dict_argument));
+	return;
+    }
+    orig_rhs = rhs;
+    if (STRICMP(rhs, "<nop>") == 0)	// "<Nop>" means nothing
+	rhs = (char_u *)"";
+    else
+	rhs = replace_termcodes(rhs, &arg_buf,
+					REPTERM_DO_LT | REPTERM_SPECIAL, NULL);
+
+    noremap = dict_get_number(d, "noremap") ? REMAP_NONE: 0;
+    if (dict_get_number(d, "script") != 0)
+	noremap = REMAP_SCRIPT;
+    expr = dict_get_number(d, "expr") != 0;
+    silent = dict_get_number(d, "silent") != 0;
+    sid = dict_get_number(d, "sid");
+    scriptversion = dict_get_number(d, "scriptversion");
+    lnum = dict_get_number(d, "lnum");
+    buffer = dict_get_number(d, "buffer");
+    nowait = dict_get_number(d, "nowait") != 0;
+    // mode from the dict is not used
+
+    if (buffer)
+    {
+	map_table = curbuf->b_maphash;
+	abbr_table = &curbuf->b_first_abbr;
+    }
+
+    // Delete any existing mapping for this lhs and mode.
+    if (buffer)
+    {
+	arg = alloc(STRLEN(lhs) + STRLEN("<buffer>") + 1);
+	if (arg == NULL)
+	    return;
+	STRCPY(arg, "<buffer>");
+	STRCPY(arg + 8, lhs);
+    }
+    else
+    {
+	arg = vim_strsave(lhs);
+	if (arg == NULL)
+	    return;
+    }
+    do_map(MAPTYPE_UNMAP, arg, mode, is_abbr);
+    vim_free(arg);
+
+    (void)map_add(map_table, abbr_table, lhsraw, rhs, orig_rhs, noremap,
+	    nowait, silent, mode, is_abbr, expr, sid, scriptversion, lnum, 0);
+    if (lhsrawalt != NULL)
+	(void)map_add(map_table, abbr_table, lhsrawalt, rhs, orig_rhs, noremap,
+		nowait, silent, mode, is_abbr, expr, sid, scriptversion,
+								      lnum, 1);
+    vim_free(arg_buf);
+}
+#endif
+
+
+#if defined(MSWIN) || defined(MACOS_X)
+
+# define VIS_SEL	(MODE_VISUAL | MODE_SELECT)	// abbreviation
+
+/*
+ * Default mappings for some often used keys.
+ */
+struct initmap
+{
+    char_u	*arg;
+    int		mode;
+};
+
+# ifdef FEAT_GUI_MSWIN
+// Use the Windows (CUA) keybindings. (GUI)
+static struct initmap initmappings[] =
+{
+	// paste, copy and cut
+	{(char_u *)"<S-Insert> \"*P", MODE_NORMAL},
+	{(char_u *)"<S-Insert> \"-d\"*P", VIS_SEL},
+	{(char_u *)"<S-Insert> <C-R><C-O>*", MODE_INSERT | MODE_CMDLINE},
+	{(char_u *)"<C-Insert> \"*y", VIS_SEL},
+	{(char_u *)"<S-Del> \"*d", VIS_SEL},
+	{(char_u *)"<C-Del> \"*d", VIS_SEL},
+	{(char_u *)"<C-X> \"*d", VIS_SEL},
+	// Missing: CTRL-C (cancel) and CTRL-V (block selection)
+};
+# endif
+
+# if defined(MSWIN) && (!defined(FEAT_GUI) || defined(VIMDLL))
+// Use the Windows (CUA) keybindings. (Console)
+static struct initmap cinitmappings[] =
+{
+	{(char_u *)"\316w <C-Home>", MODE_NORMAL | VIS_SEL},
+	{(char_u *)"\316w <C-Home>", MODE_INSERT | MODE_CMDLINE},
+	{(char_u *)"\316u <C-End>", MODE_NORMAL | VIS_SEL},
+	{(char_u *)"\316u <C-End>", MODE_INSERT | MODE_CMDLINE},
+
+	// paste, copy and cut
+#  ifdef FEAT_CLIPBOARD
+	{(char_u *)"\316\324 \"*P", MODE_NORMAL},   // SHIFT-Insert is "*P
+	{(char_u *)"\316\324 \"-d\"*P", VIS_SEL},   // SHIFT-Insert is "-d"*P
+	{(char_u *)"\316\324 \022\017*", MODE_INSERT},  // SHIFT-Insert is ^R^O*
+	{(char_u *)"\316\325 \"*y", VIS_SEL},	    // CTRL-Insert is "*y
+	{(char_u *)"\316\327 \"*d", VIS_SEL},	    // SHIFT-Del is "*d
+	{(char_u *)"\316\330 \"*d", VIS_SEL},	    // CTRL-Del is "*d
+	{(char_u *)"\030 \"*d", VIS_SEL},	    // CTRL-X is "*d
+#  else
+	{(char_u *)"\316\324 P", MODE_NORMAL},	    // SHIFT-Insert is P
+	{(char_u *)"\316\324 \"-dP", VIS_SEL},	    // SHIFT-Insert is "-dP
+	{(char_u *)"\316\324 \022\017\"", MODE_INSERT}, // SHIFT-Insert is ^R^O"
+	{(char_u *)"\316\325 y", VIS_SEL},	    // CTRL-Insert is y
+	{(char_u *)"\316\327 d", VIS_SEL},	    // SHIFT-Del is d
+	{(char_u *)"\316\330 d", VIS_SEL},	    // CTRL-Del is d
+#  endif
+};
+# endif
+
+# if defined(MACOS_X)
+static struct initmap initmappings[] =
+{
+	// Use the Standard MacOS binding.
+	// paste, copy and cut
+	{(char_u *)"<D-v> \"*P", MODE_NORMAL},
+	{(char_u *)"<D-v> \"-d\"*P", VIS_SEL},
+	{(char_u *)"<D-v> <C-R>*", MODE_INSERT | MODE_CMDLINE},
+	{(char_u *)"<D-c> \"*y", VIS_SEL},
+	{(char_u *)"<D-x> \"*d", VIS_SEL},
+	{(char_u *)"<Backspace> \"-d", VIS_SEL},
+};
+# endif
+
+# undef VIS_SEL
+#endif
+
+/*
+ * Set up default mappings.
+ */
+    void
+init_mappings(void)
+{
+#if defined(MSWIN) || defined(MACOS_X)
+    int		i;
+
+# if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+#  ifdef VIMDLL
+    if (!gui.starting)
+#  endif
+    {
+	for (i = 0; i < (int)ARRAY_LENGTH(cinitmappings); ++i)
+	    add_map(cinitmappings[i].arg, cinitmappings[i].mode, FALSE);
+    }
+# endif
+# if defined(FEAT_GUI_MSWIN) || defined(MACOS_X)
+    for (i = 0; i < (int)ARRAY_LENGTH(initmappings); ++i)
+	add_map(initmappings[i].arg, initmappings[i].mode, FALSE);
+# endif
+#endif
+}
+
+/*
+ * Add a mapping "map" for mode "mode".
+ * When "nore" is TRUE use MAPTYPE_NOREMAP.
+ * Need to put string in allocated memory, because do_map() will modify it.
+ */
+    void
+add_map(char_u *map, int mode, int nore)
+{
+    char_u	*s;
+    char_u	*cpo_save = p_cpo;
+
+    p_cpo = empty_option;	// Allow <> notation
+    s = vim_strsave(map);
+    if (s != NULL)
+    {
+	(void)do_map(nore ? MAPTYPE_NOREMAP : MAPTYPE_MAP, s, mode, FALSE);
+	vim_free(s);
+    }
+    p_cpo = cpo_save;
+}
+
+#if defined(FEAT_LANGMAP) || defined(PROTO)
+/*
+ * Any character has an equivalent 'langmap' character.  This is used for
+ * keyboards that have a special language mode that sends characters above
+ * 128 (although other characters can be translated too).  The "to" field is a
+ * Vim command character.  This avoids having to switch the keyboard back to
+ * ASCII mode when leaving Insert mode.
+ *
+ * langmap_mapchar[] maps any of 256 chars to an ASCII char used for Vim
+ * commands.
+ * langmap_mapga.ga_data is a sorted table of langmap_entry_T.  This does the
+ * same as langmap_mapchar[] for characters >= 256.
+ *
+ * Use growarray for 'langmap' chars >= 256
+ */
+typedef struct
+{
+    int	    from;
+    int     to;
+} langmap_entry_T;
+
+static garray_T langmap_mapga;
+
+/*
+ * Search for an entry in "langmap_mapga" for "from".  If found set the "to"
+ * field.  If not found insert a new entry at the appropriate location.
+ */
+    static void
+langmap_set_entry(int from, int to)
+{
+    langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
+    int		    a = 0;
+    int		    b = langmap_mapga.ga_len;
+
+    // Do a binary search for an existing entry.
+    while (a != b)
+    {
+	int i = (a + b) / 2;
+	int d = entries[i].from - from;
+
+	if (d == 0)
+	{
+	    entries[i].to = to;
+	    return;
+	}
+	if (d < 0)
+	    a = i + 1;
+	else
+	    b = i;
+    }
+
+    if (ga_grow(&langmap_mapga, 1) == FAIL)
+	return;  // out of memory
+
+    // insert new entry at position "a"
+    entries = (langmap_entry_T *)(langmap_mapga.ga_data) + a;
+    mch_memmove(entries + 1, entries,
+			(langmap_mapga.ga_len - a) * sizeof(langmap_entry_T));
+    ++langmap_mapga.ga_len;
+    entries[0].from = from;
+    entries[0].to = to;
+}
+
+/*
+ * Apply 'langmap' to multi-byte character "c" and return the result.
+ */
+    int
+langmap_adjust_mb(int c)
+{
+    langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
+    int a = 0;
+    int b = langmap_mapga.ga_len;
+
+    while (a != b)
+    {
+	int i = (a + b) / 2;
+	int d = entries[i].from - c;
+
+	if (d == 0)
+	    return entries[i].to;  // found matching entry
+	if (d < 0)
+	    a = i + 1;
+	else
+	    b = i;
+    }
+    return c;  // no entry found, return "c" unmodified
+}
+
+    void
+langmap_init(void)
+{
+    int i;
+
+    for (i = 0; i < 256; i++)
+	langmap_mapchar[i] = i;	 // we init with a one-to-one map
+    ga_init2(&langmap_mapga, sizeof(langmap_entry_T), 8);
+}
+
+/*
+ * Called when langmap option is set; the language map can be
+ * changed at any time!
+ */
+    char *
+did_set_langmap(optset_T *args UNUSED)
+{
+    char_u  *p;
+    char_u  *p2;
+    int	    from, to;
+
+    ga_clear(&langmap_mapga);		    // clear the previous map first
+    langmap_init();			    // back to one-to-one map
+
+    for (p = p_langmap; p[0] != NUL; )
+    {
+	for (p2 = p; p2[0] != NUL && p2[0] != ',' && p2[0] != ';';
+							       MB_PTR_ADV(p2))
+	{
+	    if (p2[0] == '\\' && p2[1] != NUL)
+		++p2;
+	}
+	if (p2[0] == ';')
+	    ++p2;	    // abcd;ABCD form, p2 points to A
+	else
+	    p2 = NULL;	    // aAbBcCdD form, p2 is NULL
+	while (p[0])
+	{
+	    if (p[0] == ',')
+	    {
+		++p;
+		break;
+	    }
+	    if (p[0] == '\\' && p[1] != NUL)
+		++p;
+	    from = (*mb_ptr2char)(p);
+	    to = NUL;
+	    if (p2 == NULL)
+	    {
+		MB_PTR_ADV(p);
+		if (p[0] != ',')
+		{
+		    if (p[0] == '\\')
+			++p;
+		    to = (*mb_ptr2char)(p);
+		}
+	    }
+	    else
+	    {
+		if (p2[0] != ',')
+		{
+		    if (p2[0] == '\\')
+			++p2;
+		    to = (*mb_ptr2char)(p2);
+		}
+	    }
+	    if (to == NUL)
+	    {
+		sprintf(args->os_errbuf,
+			_(e_langmap_matching_character_missing_for_str),
+			transchar(from));
+		return args->os_errbuf;
+	    }
+
+	    if (from >= 256)
+		langmap_set_entry(from, to);
+	    else
+		langmap_mapchar[from & 255] = to;
+
+	    // Advance to next pair
+	    MB_PTR_ADV(p);
+	    if (p2 != NULL)
+	    {
+		MB_PTR_ADV(p2);
+		if (*p == ';')
+		{
+		    p = p2;
+		    if (p[0] != NUL)
+		    {
+			if (p[0] != ',')
+			{
+			    sprintf(args->os_errbuf,
+				    _(e_langmap_extra_characters_after_semicolon_str),
+				    p);
+			    return args->os_errbuf;
+			}
+			++p;
+		    }
+		    break;
+		}
+	    }
+	}
+    }
+
+    return NULL;
+}
+#endif
+
+    static void
+do_exmap(exarg_T *eap, int isabbrev)
+{
+    int	    mode;
+    char_u  *cmdp;
+
+    cmdp = eap->cmd;
+    mode = get_map_mode(&cmdp, eap->forceit || isabbrev);
+
+    switch (do_map(*cmdp == 'n' ? MAPTYPE_NOREMAP
+				: *cmdp == 'u' ? MAPTYPE_UNMAP : MAPTYPE_MAP,
+						    eap->arg, mode, isabbrev))
+    {
+	case 1: emsg(_(e_invalid_argument));
+		break;
+	case 2: emsg((isabbrev ? _(e_no_such_abbreviation)
+						      : _(e_no_such_mapping)));
+		break;
+    }
+}
+
+/*
+ * ":abbreviate" and friends.
+ */
+    void
+ex_abbreviate(exarg_T *eap)
+{
+    do_exmap(eap, TRUE);	// almost the same as mapping
+}
+
+/*
+ * ":map" and friends.
+ */
+    void
+ex_map(exarg_T *eap)
+{
+    // If we are sourcing .exrc or .vimrc in current directory we
+    // print the mappings for security reasons.
+    if (secure)
+    {
+	secure = 2;
+	msg_outtrans(eap->cmd);
+	msg_putchar('\n');
+    }
+    do_exmap(eap, FALSE);
+}
+
+/*
+ * ":unmap" and friends.
+ */
+    void
+ex_unmap(exarg_T *eap)
+{
+    do_exmap(eap, FALSE);
+}
+
+/*
+ * ":mapclear" and friends.
+ */
+    void
+ex_mapclear(exarg_T *eap)
+{
+    map_clear(eap->cmd, eap->arg, eap->forceit, FALSE);
+}
+
+/*
+ * ":abclear" and friends.
+ */
+    void
+ex_abclear(exarg_T *eap)
+{
+    map_clear(eap->cmd, eap->arg, TRUE, TRUE);
+}