Adding upstream version 2:9.1.0016.upstream/2%9.1.0016

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

1 files changed, 2891 insertions, 0 deletions

diff --git a/src/sign.c b/src/sign.c
new file mode 100644
index 0000000..8aa043b
--- /dev/null
+++ b/src/sign.c
@@ -0,0 +1,2891 @@
+/* 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.
+ */
+
+/*
+ * sign.c: functions for managing signs
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_SIGNS) || defined(PROTO)
+
+/*
+ * Struct to hold the sign properties.
+ */
+typedef struct sign sign_T;
+
+struct sign
+{
+    sign_T	*sn_next;	// next sign in list
+    int		sn_typenr;	// type number of sign
+    char_u	*sn_name;	// name of sign
+    char_u	*sn_icon;	// name of pixmap
+# ifdef FEAT_SIGN_ICONS
+    void	*sn_image;	// icon image
+# endif
+    char_u	*sn_text;	// text used instead of pixmap
+    int		sn_line_hl;	// highlight ID for line
+    int		sn_text_hl;	// highlight ID for text
+    int		sn_cul_hl;	// highlight ID for text on current line when 'cursorline' is set
+    int		sn_num_hl;	// highlight ID for line number
+};
+
+static sign_T	*first_sign = NULL;
+static int	next_sign_typenr = 1;
+
+static void sign_list_defined(sign_T *sp);
+static void sign_undefine(sign_T *sp, sign_T *sp_prev);
+
+static char *cmds[] = {
+			"define",
+# define SIGNCMD_DEFINE	0
+			"undefine",
+# define SIGNCMD_UNDEFINE 1
+			"list",
+# define SIGNCMD_LIST	2
+			"place",
+# define SIGNCMD_PLACE	3
+			"unplace",
+# define SIGNCMD_UNPLACE 4
+			"jump",
+# define SIGNCMD_JUMP	5
+			NULL
+# define SIGNCMD_LAST	6
+};
+
+#define FOR_ALL_SIGNS(sp)	\
+    for ((sp) = first_sign; (sp) != NULL; (sp) = (sp)->sn_next)
+
+static hashtab_T	sg_table;	// sign group (signgroup_T) hashtable
+static int		next_sign_id = 1; // next sign id in the global group
+
+/*
+ * Initialize data needed for managing signs
+ */
+    void
+init_signs(void)
+{
+    hash_init(&sg_table);		// sign group hash table
+}
+
+/*
+ * A new sign in group 'groupname' is added. If the group is not present,
+ * create it. Otherwise reference the group.
+ */
+    static signgroup_T *
+sign_group_ref(char_u *groupname)
+{
+    hash_T		hash;
+    hashitem_T		*hi;
+    signgroup_T		*group;
+
+    hash = hash_hash(groupname);
+    hi = hash_lookup(&sg_table, groupname, hash);
+    if (HASHITEM_EMPTY(hi))
+    {
+	// new group
+	group = alloc(offsetof(signgroup_T, sg_name) + STRLEN(groupname) + 1);
+	if (group == NULL)
+	    return NULL;
+	STRCPY(group->sg_name, groupname);
+	group->sg_refcount = 1;
+	group->sg_next_sign_id = 1;
+	hash_add_item(&sg_table, hi, group->sg_name, hash);
+    }
+    else
+    {
+	// existing group
+	group = HI2SG(hi);
+	group->sg_refcount++;
+    }
+
+    return group;
+}
+
+/*
+ * A sign in group 'groupname' is removed. If all the signs in this group are
+ * removed, then remove the group.
+ */
+    static void
+sign_group_unref(char_u *groupname)
+{
+    hashitem_T		*hi;
+    signgroup_T		*group;
+
+    hi = hash_find(&sg_table, groupname);
+    if (HASHITEM_EMPTY(hi))
+	return;
+
+    group = HI2SG(hi);
+    group->sg_refcount--;
+    if (group->sg_refcount == 0)
+    {
+	// All the signs in this group are removed
+	hash_remove(&sg_table, hi, "sign remove");
+	vim_free(group);
+    }
+}
+
+/*
+ * Returns TRUE if 'sign' is in 'group'.
+ * A sign can either be in the global group (sign->se_group == NULL)
+ * or in a named group. If 'group' is '*', then the sign is part of the group.
+ */
+    static int
+sign_in_group(sign_entry_T *sign, char_u *group)
+{
+    return ((group != NULL && STRCMP(group, "*") == 0)
+	    || (group == NULL && sign->se_group == NULL)
+	    || (group != NULL && sign->se_group != NULL
+			      && STRCMP(group, sign->se_group->sg_name) == 0));
+}
+
+/*
+ * Return TRUE if "sign" is to be displayed in window "wp".
+ * If the group name starts with "PopUp" it only shows in a popup window.
+ */
+    static int
+sign_group_for_window(sign_entry_T *sign, win_T *wp)
+{
+    int for_popup = sign->se_group != NULL
+			&& STRNCMP("PopUp", sign->se_group->sg_name, 5) == 0;
+
+    return WIN_IS_POPUP(wp) ? for_popup : !for_popup;
+}
+
+/*
+ * Get the next free sign identifier in the specified group
+ */
+    static int
+sign_group_get_next_signid(buf_T *buf, char_u *groupname)
+{
+    int			id = 1;
+    signgroup_T		*group = NULL;
+    sign_entry_T	*sign;
+    hashitem_T		*hi;
+    int			found = FALSE;
+
+    if (groupname != NULL)
+    {
+	hi = hash_find(&sg_table, groupname);
+	if (HASHITEM_EMPTY(hi))
+	    return id;
+	group = HI2SG(hi);
+    }
+
+    // Search for the next usable sign identifier
+    while (!found)
+    {
+	if (group == NULL)
+	    id = next_sign_id++;		// global group
+	else
+	    id = group->sg_next_sign_id++;
+
+	// Check whether this sign is already placed in the buffer
+	found = TRUE;
+	FOR_ALL_SIGNS_IN_BUF(buf, sign)
+	{
+	    if (id == sign->se_id && sign_in_group(sign, groupname))
+	    {
+		found = FALSE;		// sign identifier is in use
+		break;
+	    }
+	}
+    }
+
+    return id;
+}
+
+/*
+ * Insert a new sign into the signlist for buffer 'buf' between the 'prev' and
+ * 'next' signs.
+ */
+    static void
+insert_sign(
+    buf_T	*buf,		// buffer to store sign in
+    sign_entry_T *prev,		// previous sign entry
+    sign_entry_T *next,		// next sign entry
+    int		id,		// sign ID
+    char_u	*group,		// sign group; NULL for global group
+    int		prio,		// sign priority
+    linenr_T	lnum,		// line number which gets the mark
+    int		typenr)		// typenr of sign we are adding
+{
+    sign_entry_T *newsign;
+
+    newsign = lalloc_id(sizeof(sign_entry_T), FALSE, aid_insert_sign);
+    if (newsign == NULL)
+	return;
+
+    newsign->se_id = id;
+    newsign->se_lnum = lnum;
+    newsign->se_typenr = typenr;
+    if (group != NULL)
+    {
+	newsign->se_group = sign_group_ref(group);
+	if (newsign->se_group == NULL)
+	{
+	    vim_free(newsign);
+	    return;
+	}
+    }
+    else
+	newsign->se_group = NULL;
+    newsign->se_priority = prio;
+    newsign->se_next = next;
+    newsign->se_prev = prev;
+    if (next != NULL)
+	next->se_prev = newsign;
+
+    if (prev == NULL)
+    {
+	// When adding first sign need to redraw the windows to create the
+	// column for signs.
+	if (buf->b_signlist == NULL)
+	{
+	    redraw_buf_later(buf, UPD_NOT_VALID);
+	    changed_line_abv_curs();
+	}
+
+	// first sign in signlist
+	buf->b_signlist = newsign;
+#ifdef FEAT_NETBEANS_INTG
+	if (netbeans_active())
+	    buf->b_has_sign_column = TRUE;
+#endif
+    }
+    else
+	prev->se_next = newsign;
+}
+
+/*
+ * Insert a new sign sorted by line number and sign priority.
+ */
+    static void
+insert_sign_by_lnum_prio(
+    buf_T	*buf,		// buffer to store sign in
+    sign_entry_T *prev,		// previous sign entry
+    int		id,		// sign ID
+    char_u	*group,		// sign group; NULL for global group
+    int		prio,		// sign priority
+    linenr_T	lnum,		// line number which gets the mark
+    int		typenr)		// typenr of sign we are adding
+{
+    sign_entry_T	*sign;
+
+    // keep signs sorted by lnum and by priority: insert new sign at
+    // the proper position in the list for this lnum.
+    while (prev != NULL && prev->se_lnum == lnum && prev->se_priority <= prio)
+	prev = prev->se_prev;
+    if (prev == NULL)
+	sign = buf->b_signlist;
+    else
+	sign = prev->se_next;
+
+    insert_sign(buf, prev, sign, id, group, prio, lnum, typenr);
+}
+
+/*
+ * Lookup a sign by typenr. Returns NULL if sign is not found.
+ */
+    static sign_T *
+find_sign_by_typenr(int typenr)
+{
+    sign_T	*sp;
+
+    FOR_ALL_SIGNS(sp)
+	if (sp->sn_typenr == typenr)
+	    return sp;
+    return NULL;
+}
+
+/*
+ * Get the name of a sign by its typenr.
+ */
+    static char_u *
+sign_typenr2name(int typenr)
+{
+    sign_T	*sp;
+
+    FOR_ALL_SIGNS(sp)
+	if (sp->sn_typenr == typenr)
+	    return sp->sn_name;
+    return (char_u *)_("[Deleted]");
+}
+
+/*
+ * Return information about a sign in a Dict
+ */
+    static dict_T *
+sign_get_info(sign_entry_T *sign)
+{
+    dict_T	*d;
+
+    if ((d = dict_alloc_id(aid_sign_getinfo)) == NULL)
+	return NULL;
+    dict_add_number(d, "id", sign->se_id);
+    dict_add_string(d, "group", (sign->se_group == NULL) ?
+				       (char_u *)"" : sign->se_group->sg_name);
+    dict_add_number(d, "lnum", sign->se_lnum);
+    dict_add_string(d, "name", sign_typenr2name(sign->se_typenr));
+    dict_add_number(d, "priority", sign->se_priority);
+
+    return d;
+}
+
+/*
+ * Sort the signs placed on the same line as "sign" by priority.  Invoked after
+ * changing the priority of an already placed sign.  Assumes the signs in the
+ * buffer are sorted by line number and priority.
+ */
+    static void
+sign_sort_by_prio_on_line(buf_T *buf, sign_entry_T *sign)
+{
+    sign_entry_T *p = NULL;
+
+    // If there is only one sign in the buffer or only one sign on the line or
+    // the sign is already sorted by priority, then return.
+    if ((sign->se_prev == NULL
+		|| sign->se_prev->se_lnum != sign->se_lnum
+		|| sign->se_prev->se_priority > sign->se_priority)
+	    && (sign->se_next == NULL
+		|| sign->se_next->se_lnum != sign->se_lnum
+		|| sign->se_next->se_priority < sign->se_priority))
+	return;
+
+    // One or more signs on the same line as 'sign'
+    // Find a sign after which 'sign' should be inserted
+
+    // First search backward for a sign with higher priority on the same line
+    p = sign;
+    while (p->se_prev != NULL && p->se_prev->se_lnum == sign->se_lnum
+			       && p->se_prev->se_priority <= sign->se_priority)
+	p = p->se_prev;
+
+    if (p == sign)
+    {
+	// Sign not found. Search forward for a sign with priority just before
+	// 'sign'.
+	p = sign->se_next;
+	while (p->se_next != NULL && p->se_next->se_lnum == sign->se_lnum
+				&& p->se_next->se_priority > sign->se_priority)
+	    p = p->se_next;
+    }
+
+    // Remove 'sign' from the list
+    if (buf->b_signlist == sign)
+	buf->b_signlist = sign->se_next;
+    if (sign->se_prev != NULL)
+	sign->se_prev->se_next = sign->se_next;
+    if (sign->se_next != NULL)
+	sign->se_next->se_prev = sign->se_prev;
+    sign->se_prev = NULL;
+    sign->se_next = NULL;
+
+    // Re-insert 'sign' at the right place
+    if (p->se_priority <= sign->se_priority)
+    {
+	// 'sign' has a higher priority and should be inserted before 'p'
+	sign->se_prev = p->se_prev;
+	sign->se_next = p;
+	p->se_prev = sign;
+	if (sign->se_prev != NULL)
+	    sign->se_prev->se_next = sign;
+	if (buf->b_signlist == p)
+	    buf->b_signlist = sign;
+    }
+    else
+    {
+	// 'sign' has a lower priority and should be inserted after 'p'
+	sign->se_prev = p;
+	sign->se_next = p->se_next;
+	p->se_next = sign;
+	if (sign->se_next != NULL)
+	    sign->se_next->se_prev = sign;
+    }
+}
+
+/*
+ * Add the sign into the signlist. Find the right spot to do it though.
+ */
+    static void
+buf_addsign(
+    buf_T	*buf,		// buffer to store sign in
+    int		id,		// sign ID
+    char_u	*groupname,	// sign group
+    int		prio,		// sign priority
+    linenr_T	lnum,		// line number which gets the mark
+    int		typenr)		// typenr of sign we are adding
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+    sign_entry_T	*prev;		// the previous sign
+
+    prev = NULL;
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (lnum == sign->se_lnum && id == sign->se_id
+		&& sign_in_group(sign, groupname))
+	{
+	    // Update an existing sign
+	    sign->se_typenr = typenr;
+	    sign->se_priority = prio;
+	    sign_sort_by_prio_on_line(buf, sign);
+	    return;
+	}
+	else if (lnum < sign->se_lnum)
+	{
+	    insert_sign_by_lnum_prio(buf, prev, id, groupname, prio,
+								lnum, typenr);
+	    return;
+	}
+	prev = sign;
+    }
+
+    insert_sign_by_lnum_prio(buf, prev, id, groupname, prio, lnum, typenr);
+    return;
+}
+
+/*
+ * For an existing, placed sign "markId" change the type to "typenr".
+ * Returns the line number of the sign, or zero if the sign is not found.
+ */
+    static linenr_T
+buf_change_sign_type(
+    buf_T	*buf,		// buffer to store sign in
+    int		markId,		// sign ID
+    char_u	*group,		// sign group
+    int		typenr,		// typenr of sign we are adding
+    int		prio)		// sign priority
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (sign->se_id == markId && sign_in_group(sign, group))
+	{
+	    sign->se_typenr = typenr;
+	    sign->se_priority = prio;
+	    sign_sort_by_prio_on_line(buf, sign);
+	    return sign->se_lnum;
+	}
+    }
+
+    return (linenr_T)0;
+}
+
+/*
+ * Return the attributes of the first sign placed on line 'lnum' in buffer
+ * 'buf'. Used when refreshing the screen. Returns TRUE if a sign is found on
+ * 'lnum', FALSE otherwise.
+ */
+    int
+buf_get_signattrs(win_T *wp, linenr_T lnum, sign_attrs_T *sattr)
+{
+    sign_entry_T	*sign;
+    sign_T		*sp;
+    buf_T		*buf = wp->w_buffer;
+
+    CLEAR_POINTER(sattr);
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (sign->se_lnum > lnum)
+	    // Signs are sorted by line number in the buffer. No need to check
+	    // for signs after the specified line number 'lnum'.
+	    break;
+
+	if (sign->se_lnum == lnum
+# ifdef FEAT_PROP_POPUP
+		&& sign_group_for_window(sign, wp)
+# endif
+		)
+	{
+	    sattr->sat_typenr = sign->se_typenr;
+	    sp = find_sign_by_typenr(sign->se_typenr);
+	    if (sp == NULL)
+		return FALSE;
+
+# ifdef FEAT_SIGN_ICONS
+	    sattr->sat_icon = sp->sn_image;
+# endif
+	    sattr->sat_text = sp->sn_text;
+	    if (sattr->sat_text != NULL && sp->sn_text_hl > 0)
+		sattr->sat_texthl = syn_id2attr(sp->sn_text_hl);
+	    if (sp->sn_line_hl > 0)
+		sattr->sat_linehl = syn_id2attr(sp->sn_line_hl);
+	    if (sp->sn_cul_hl > 0)
+		sattr->sat_culhl = syn_id2attr(sp->sn_cul_hl);
+	    if (sp->sn_num_hl > 0)
+		sattr->sat_numhl = syn_id2attr(sp->sn_num_hl);
+	    sattr->sat_priority = sign->se_priority;
+
+	    // If there is another sign next with the same priority, may
+	    // combine the text and the line highlighting.
+	    if (sign->se_next != NULL
+		    && sign->se_next->se_priority == sign->se_priority
+		    && sign->se_next->se_lnum == sign->se_lnum)
+	    {
+		sign_T	*next_sp = find_sign_by_typenr(sign->se_next->se_typenr);
+
+		if (next_sp != NULL)
+		{
+		    if (sattr->sat_icon == NULL && sattr->sat_text == NULL)
+		    {
+# ifdef FEAT_SIGN_ICONS
+			sattr->sat_icon = next_sp->sn_image;
+# endif
+			sattr->sat_text = next_sp->sn_text;
+		    }
+		    if (sp->sn_text_hl <= 0 && next_sp->sn_text_hl > 0)
+			sattr->sat_texthl = syn_id2attr(next_sp->sn_text_hl);
+		    if (sp->sn_line_hl <= 0 && next_sp->sn_line_hl > 0)
+			sattr->sat_linehl = syn_id2attr(next_sp->sn_line_hl);
+		    if (sp->sn_cul_hl <= 0 && next_sp->sn_cul_hl > 0)
+			sattr->sat_culhl = syn_id2attr(next_sp->sn_cul_hl);
+		    if (sp->sn_num_hl <= 0 && next_sp->sn_num_hl > 0)
+			sattr->sat_numhl = syn_id2attr(next_sp->sn_num_hl);
+		}
+	    }
+	    return TRUE;
+	}
+    }
+    return FALSE;
+}
+
+/*
+ * Delete sign 'id' in group 'group' from buffer 'buf'.
+ * If 'id' is zero, then delete all the signs in group 'group'. Otherwise
+ * delete only the specified sign.
+ * If 'group' is '*', then delete the sign in all the groups. If 'group' is
+ * NULL, then delete the sign in the global group. Otherwise delete the sign in
+ * the specified group.
+ * Returns the line number of the deleted sign. If multiple signs are deleted,
+ * then returns the line number of the last sign deleted.
+ */
+    linenr_T
+buf_delsign(
+    buf_T	*buf,		// buffer sign is stored in
+    linenr_T	atlnum,		// sign at this line, 0 - at any line
+    int		id,		// sign id
+    char_u	*group)		// sign group
+{
+    sign_entry_T	**lastp;	// pointer to pointer to current sign
+    sign_entry_T	*sign;		// a sign in a b_signlist
+    sign_entry_T	*next;		// the next sign in a b_signlist
+    linenr_T		lnum;		// line number whose sign was deleted
+
+    lastp = &buf->b_signlist;
+    lnum = 0;
+    for (sign = buf->b_signlist; sign != NULL; sign = next)
+    {
+	next = sign->se_next;
+	if ((id == 0 || sign->se_id == id)
+		&& (atlnum == 0 || sign->se_lnum == atlnum)
+		&& sign_in_group(sign, group))
+
+	{
+	    *lastp = next;
+	    if (next != NULL)
+		next->se_prev = sign->se_prev;
+	    lnum = sign->se_lnum;
+	    if (sign->se_group != NULL)
+		sign_group_unref(sign->se_group->sg_name);
+	    vim_free(sign);
+	    redraw_buf_line_later(buf, lnum);
+
+	    // Check whether only one sign needs to be deleted
+	    // If deleting a sign with a specific identifier in a particular
+	    // group or deleting any sign at a particular line number, delete
+	    // only one sign.
+	    if (group == NULL
+		    || (*group != '*' && id != 0)
+		    || (*group == '*' && atlnum != 0))
+		break;
+	}
+	else
+	    lastp = &sign->se_next;
+    }
+
+    // When deleting the last sign the cursor position may change, because the
+    // sign columns no longer shows.  And the 'signcolumn' may be hidden.
+    if (buf->b_signlist == NULL)
+    {
+	redraw_buf_later(buf, UPD_NOT_VALID);
+	changed_line_abv_curs();
+    }
+
+    return lnum;
+}
+
+
+/*
+ * Find the line number of the sign with the requested id in group 'group'. If
+ * the sign does not exist, return 0 as the line number. This will still let
+ * the correct file get loaded.
+ */
+    int
+buf_findsign(
+    buf_T	*buf,		// buffer to store sign in
+    int		id,		// sign ID
+    char_u	*group)		// sign group
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+	if (sign->se_id == id && sign_in_group(sign, group))
+	    return sign->se_lnum;
+
+    return 0;
+}
+
+/*
+ * Return the sign at line 'lnum' in buffer 'buf'. Returns NULL if a sign is
+ * not found at the line. If 'groupname' is NULL, searches in the global group.
+ */
+    static sign_entry_T *
+buf_getsign_at_line(
+    buf_T	*buf,		// buffer whose sign we are searching for
+    linenr_T	lnum,		// line number of sign
+    char_u	*groupname)	// sign group name
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (sign->se_lnum > lnum)
+	    // Signs are sorted by line number in the buffer. No need to check
+	    // for signs after the specified line number 'lnum'.
+	    break;
+
+	if (sign->se_lnum == lnum && sign_in_group(sign, groupname))
+	    return sign;
+    }
+
+    return NULL;
+}
+
+/*
+ * Return the identifier of the sign at line number 'lnum' in buffer 'buf'.
+ */
+    int
+buf_findsign_id(
+    buf_T	*buf,		// buffer whose sign we are searching for
+    linenr_T	lnum,		// line number of sign
+    char_u	*groupname)	// sign group name
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+
+    sign = buf_getsign_at_line(buf, lnum, groupname);
+    if (sign != NULL)
+	return sign->se_id;
+
+    return 0;
+}
+
+# if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
+/*
+ * See if a given type of sign exists on a specific line.
+ */
+    int
+buf_findsigntype_id(
+    buf_T	*buf,		// buffer whose sign we are searching for
+    linenr_T	lnum,		// line number of sign
+    int		typenr)		// sign type number
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (sign->se_lnum > lnum)
+	    // Signs are sorted by line number in the buffer. No need to check
+	    // for signs after the specified line number 'lnum'.
+	    break;
+
+	if (sign->se_lnum == lnum && sign->se_typenr == typenr)
+	    return sign->se_id;
+    }
+
+    return 0;
+}
+
+
+#  if defined(FEAT_SIGN_ICONS) || defined(PROTO)
+/*
+ * Return the number of icons on the given line.
+ */
+    int
+buf_signcount(buf_T *buf, linenr_T lnum)
+{
+    sign_entry_T	*sign;		// a sign in the signlist
+    int			count = 0;
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (sign->se_lnum > lnum)
+	    // Signs are sorted by line number in the buffer. No need to check
+	    // for signs after the specified line number 'lnum'.
+	    break;
+
+	if (sign->se_lnum == lnum)
+	    if (sign_get_image(sign->se_typenr) != NULL)
+		count++;
+    }
+
+    return count;
+}
+#  endif // FEAT_SIGN_ICONS
+# endif // FEAT_NETBEANS_INTG
+
+/*
+ * Delete signs in group 'group' in buffer "buf". If 'group' is '*', then
+ * delete all the signs.
+ */
+    void
+buf_delete_signs(buf_T *buf, char_u *group)
+{
+    sign_entry_T	*sign;
+    sign_entry_T	**lastp;	// pointer to pointer to current sign
+    sign_entry_T	*next;
+
+    // When deleting the last sign need to redraw the windows to remove the
+    // sign column. Not when curwin is NULL (this means we're exiting).
+    if (buf->b_signlist != NULL && curwin != NULL)
+    {
+	redraw_buf_later(buf, UPD_NOT_VALID);
+	changed_line_abv_curs();
+    }
+
+    lastp = &buf->b_signlist;
+    for (sign = buf->b_signlist; sign != NULL; sign = next)
+    {
+	next = sign->se_next;
+	if (sign_in_group(sign, group))
+	{
+	    *lastp = next;
+	    if (next != NULL)
+		next->se_prev = sign->se_prev;
+	    if (sign->se_group != NULL)
+		sign_group_unref(sign->se_group->sg_name);
+	    vim_free(sign);
+	}
+	else
+	    lastp = &sign->se_next;
+    }
+}
+
+/*
+ * List placed signs for "rbuf".  If "rbuf" is NULL do it for all buffers.
+ */
+    static void
+sign_list_placed(buf_T *rbuf, char_u *sign_group)
+{
+    buf_T		*buf;
+    sign_entry_T	*sign;
+    char		lbuf[MSG_BUF_LEN];
+    char		group[MSG_BUF_LEN];
+
+    msg_puts_title(_("\n--- Signs ---"));
+    msg_putchar('\n');
+    if (rbuf == NULL)
+	buf = firstbuf;
+    else
+	buf = rbuf;
+    while (buf != NULL && !got_int)
+    {
+	if (buf->b_signlist != NULL)
+	{
+	    vim_snprintf(lbuf, MSG_BUF_LEN, _("Signs for %s:"), buf->b_fname);
+	    msg_puts_attr(lbuf, HL_ATTR(HLF_D));
+	    msg_putchar('\n');
+	}
+	FOR_ALL_SIGNS_IN_BUF(buf, sign)
+	{
+	    if (got_int)
+		break;
+	    if (!sign_in_group(sign, sign_group))
+		continue;
+	    if (sign->se_group != NULL)
+		vim_snprintf(group, MSG_BUF_LEN, _("  group=%s"),
+						      sign->se_group->sg_name);
+	    else
+		group[0] = '\0';
+	    vim_snprintf(lbuf, MSG_BUF_LEN,
+			   _("    line=%ld  id=%d%s  name=%s  priority=%d"),
+			   (long)sign->se_lnum, sign->se_id, group,
+			 sign_typenr2name(sign->se_typenr), sign->se_priority);
+	    msg_puts(lbuf);
+	    msg_putchar('\n');
+	}
+	if (rbuf != NULL)
+	    break;
+	buf = buf->b_next;
+    }
+}
+
+/*
+ * Adjust a placed sign for inserted/deleted lines.
+ */
+    void
+sign_mark_adjust(
+    linenr_T	line1,
+    linenr_T	line2,
+    long	amount,
+    long	amount_after)
+{
+    sign_entry_T	*sign;		// a sign in a b_signlist
+    linenr_T		new_lnum;
+
+    FOR_ALL_SIGNS_IN_BUF(curbuf, sign)
+    {
+	// Ignore changes to lines after the sign
+	if (sign->se_lnum < line1)
+	    continue;
+	new_lnum = sign->se_lnum;
+	if (sign->se_lnum <= line2)
+	{
+	    if (amount != MAXLNUM)
+		new_lnum += amount;
+	}
+	else if (sign->se_lnum > line2)
+	    // Lines inserted or deleted before the sign
+	    new_lnum += amount_after;
+
+	// If the new sign line number is past the last line in the buffer,
+	// then don't adjust the line number. Otherwise, it will always be past
+	// the last line and will not be visible.
+	if (new_lnum <= curbuf->b_ml.ml_line_count)
+	    sign->se_lnum = new_lnum;
+    }
+}
+
+/*
+ * Find index of a ":sign" subcmd from its name.
+ * "*end_cmd" must be writable.
+ */
+    static int
+sign_cmd_idx(
+    char_u	*begin_cmd,	// begin of sign subcmd
+    char_u	*end_cmd)	// just after sign subcmd
+{
+    int		idx;
+    char	save = *end_cmd;
+
+    *end_cmd = NUL;
+    for (idx = 0; ; ++idx)
+	if (cmds[idx] == NULL || STRCMP(begin_cmd, cmds[idx]) == 0)
+	    break;
+    *end_cmd = save;
+    return idx;
+}
+
+/*
+ * Find a sign by name. Also returns pointer to the previous sign.
+ */
+    static sign_T *
+sign_find(char_u *name, sign_T **sp_prev)
+{
+    sign_T *sp;
+
+    if (sp_prev != NULL)
+	*sp_prev = NULL;
+    FOR_ALL_SIGNS(sp)
+    {
+	if (STRCMP(sp->sn_name, name) == 0)
+	    break;
+	if (sp_prev != NULL)
+	    *sp_prev = sp;
+    }
+
+    return sp;
+}
+
+/*
+ * Allocate a new sign
+ */
+    static sign_T *
+alloc_new_sign(char_u *name)
+{
+    sign_T	*sp;
+    sign_T	*lp;
+    int	start = next_sign_typenr;
+
+    // Allocate a new sign.
+    sp = alloc_clear_id(sizeof(sign_T), aid_sign_define_by_name);
+    if (sp == NULL)
+	return NULL;
+
+    // Check that next_sign_typenr is not already being used.
+    // This only happens after wrapping around.  Hopefully
+    // another one got deleted and we can use its number.
+    for (lp = first_sign; lp != NULL; )
+    {
+	if (lp->sn_typenr == next_sign_typenr)
+	{
+	    ++next_sign_typenr;
+	    if (next_sign_typenr == MAX_TYPENR)
+		next_sign_typenr = 1;
+	    if (next_sign_typenr == start)
+	    {
+		vim_free(sp);
+		emsg(_(e_too_many_signs_defined));
+		return NULL;
+	    }
+	    lp = first_sign;  // start all over
+	    continue;
+	}
+	lp = lp->sn_next;
+    }
+
+    sp->sn_typenr = next_sign_typenr;
+    if (++next_sign_typenr == MAX_TYPENR)
+	next_sign_typenr = 1; // wrap around
+
+    sp->sn_name = vim_strsave(name);
+    if (sp->sn_name == NULL)  // out of memory
+    {
+	vim_free(sp);
+	return NULL;
+    }
+
+    return sp;
+}
+
+/*
+ * Initialize the icon information for a new sign
+ */
+    static void
+sign_define_init_icon(sign_T *sp, char_u *icon)
+{
+    vim_free(sp->sn_icon);
+    sp->sn_icon = vim_strsave(icon);
+    backslash_halve(sp->sn_icon);
+# ifdef FEAT_SIGN_ICONS
+    if (gui.in_use)
+    {
+	out_flush();
+	if (sp->sn_image != NULL)
+	    gui_mch_destroy_sign(sp->sn_image);
+	sp->sn_image = gui_mch_register_sign(sp->sn_icon);
+    }
+# endif
+}
+
+/*
+ * Initialize the text for a new sign
+ */
+    static int
+sign_define_init_text(sign_T *sp, char_u *text)
+{
+    char_u	*s;
+    char_u	*endp;
+    int		cells;
+    int		len;
+
+    endp = text + (int)STRLEN(text);
+
+    // Remove backslashes so that it is possible to use a space.
+    for (s = text; s + 1 < endp; ++s)
+	if (*s == '\\')
+	{
+	    STRMOVE(s, s + 1);
+	    --endp;
+	}
+
+    // Count cells and check for non-printable chars
+    if (has_mbyte)
+    {
+	cells = 0;
+	for (s = text; s < endp; s += (*mb_ptr2len)(s))
+	{
+	    if (!vim_isprintc((*mb_ptr2char)(s)))
+		break;
+	    cells += (*mb_ptr2cells)(s);
+	}
+    }
+    else
+    {
+	for (s = text; s < endp; ++s)
+	    if (!vim_isprintc(*s))
+		break;
+	cells = (int)(s - text);
+    }
+
+    // Currently sign text must be one or two display cells
+    if (s != endp || cells < 1 || cells > 2)
+    {
+	semsg(_(e_invalid_sign_text_str), text);
+	return FAIL;
+    }
+
+    vim_free(sp->sn_text);
+    // Allocate one byte more if we need to pad up
+    // with a space.
+    len = (int)(endp - text + ((cells == 1) ? 1 : 0));
+    sp->sn_text = vim_strnsave(text, len);
+
+    // For single character sign text, pad with a space.
+    if (sp->sn_text != NULL && cells == 1)
+	STRCPY(sp->sn_text + len - 1, " ");
+
+    return OK;
+}
+
+/*
+ * Define a new sign or update an existing sign
+ */
+    int
+sign_define_by_name(
+	char_u	*name,
+	char_u	*icon,
+	char_u	*linehl,
+	char_u	*text,
+	char_u	*texthl,
+	char_u	*culhl,
+	char_u	*numhl)
+{
+    sign_T	*sp_prev;
+    sign_T	*sp;
+
+    sp = sign_find(name, &sp_prev);
+    if (sp == NULL)
+    {
+	sp = alloc_new_sign(name);
+	if (sp == NULL)
+	    return FAIL;
+
+	// add the new sign to the list of signs
+	if (sp_prev == NULL)
+	    first_sign = sp;
+	else
+	    sp_prev->sn_next = sp;
+    }
+    else
+    {
+	win_T *wp;
+
+	// Signs may already exist, a redraw is needed in windows with a
+	// non-empty sign list.
+	FOR_ALL_WINDOWS(wp)
+	    if (wp->w_buffer->b_signlist != NULL)
+		redraw_buf_later(wp->w_buffer, UPD_NOT_VALID);
+    }
+
+    // set values for a defined sign.
+    if (icon != NULL)
+	sign_define_init_icon(sp, icon);
+
+    if (text != NULL && (sign_define_init_text(sp, text) == FAIL))
+	return FAIL;
+
+    if (linehl != NULL)
+    {
+	if (*linehl == NUL)
+	    sp->sn_line_hl = 0;
+	else
+	    sp->sn_line_hl = syn_check_group(linehl, (int)STRLEN(linehl));
+    }
+
+    if (texthl != NULL)
+    {
+	if (*texthl == NUL)
+	    sp->sn_text_hl = 0;
+	else
+	    sp->sn_text_hl = syn_check_group(texthl, (int)STRLEN(texthl));
+    }
+
+    if (culhl != NULL)
+    {
+	if (*culhl == NUL)
+	    sp->sn_cul_hl = 0;
+	else
+	    sp->sn_cul_hl = syn_check_group(culhl, (int)STRLEN(culhl));
+    }
+
+    if (numhl != NULL)
+    {
+	if (*numhl == NUL)
+	    sp->sn_num_hl = 0;
+	else
+	    sp->sn_num_hl = syn_check_group(numhl, (int)STRLEN(numhl));
+    }
+
+    return OK;
+}
+
+/*
+ * Return TRUE if sign "name" exists.
+ */
+    int
+sign_exists_by_name(char_u *name)
+{
+    return sign_find(name, NULL) != NULL;
+}
+
+/*
+ * Free the sign specified by 'name'.
+ */
+    int
+sign_undefine_by_name(char_u *name, int give_error)
+{
+    sign_T	*sp_prev;
+    sign_T	*sp;
+
+    sp = sign_find(name, &sp_prev);
+    if (sp == NULL)
+    {
+	if (give_error)
+	    semsg(_(e_unknown_sign_str), name);
+	return FAIL;
+    }
+    sign_undefine(sp, sp_prev);
+
+    return OK;
+}
+
+/*
+ * List the signs matching 'name'
+ */
+    static void
+sign_list_by_name(char_u *name)
+{
+    sign_T	*sp;
+
+    sp = sign_find(name, NULL);
+    if (sp != NULL)
+	sign_list_defined(sp);
+    else
+	semsg(_(e_unknown_sign_str), name);
+}
+
+    static void
+may_force_numberwidth_recompute(buf_T *buf, int unplace)
+{
+    tabpage_T	*tp;
+    win_T		*wp;
+
+    FOR_ALL_TAB_WINDOWS(tp, wp)
+	if (wp->w_buffer == buf
+		&& (wp->w_p_nu || wp->w_p_rnu)
+		&& (unplace || wp->w_nrwidth_width < 2)
+		&& (*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u'))
+	    wp->w_nrwidth_line_count = 0;
+}
+
+/*
+ * Place a sign at the specified file location or update a sign.
+ */
+    int
+sign_place(
+	int		*sign_id,
+	char_u		*sign_group,
+	char_u		*sign_name,
+	buf_T		*buf,
+	linenr_T	lnum,
+	int		prio)
+{
+    sign_T	*sp;
+
+    // Check for reserved character '*' in group name
+    if (sign_group != NULL && (*sign_group == '*' || *sign_group == '\0'))
+	return FAIL;
+
+    FOR_ALL_SIGNS(sp)
+	if (STRCMP(sp->sn_name, sign_name) == 0)
+	    break;
+    if (sp == NULL)
+    {
+	semsg(_(e_unknown_sign_str), sign_name);
+	return FAIL;
+    }
+    if (*sign_id == 0)
+	*sign_id = sign_group_get_next_signid(buf, sign_group);
+
+    if (lnum > 0)
+	// ":sign place {id} line={lnum} name={name} file={fname}":
+	// place a sign
+	buf_addsign(buf, *sign_id, sign_group, prio, lnum, sp->sn_typenr);
+    else
+	// ":sign place {id} file={fname}": change sign type and/or priority
+	lnum = buf_change_sign_type(buf, *sign_id, sign_group, sp->sn_typenr,
+								prio);
+    if (lnum > 0)
+    {
+	redraw_buf_line_later(buf, lnum);
+
+	// When displaying signs in the 'number' column, if the width of the
+	// number column is less than 2, then force recomputing the width.
+	may_force_numberwidth_recompute(buf, FALSE);
+    }
+    else
+    {
+	semsg(_(e_not_possible_to_change_sign_str), sign_name);
+	return FAIL;
+    }
+
+    return OK;
+}
+
+/*
+ * Unplace the specified sign
+ */
+    static int
+sign_unplace(int sign_id, char_u *sign_group, buf_T *buf, linenr_T atlnum)
+{
+    if (buf->b_signlist == NULL)	// No signs in the buffer
+	return OK;
+
+    if (sign_id == 0)
+    {
+	// Delete all the signs in the specified buffer
+	redraw_buf_later(buf, UPD_NOT_VALID);
+	buf_delete_signs(buf, sign_group);
+    }
+    else
+    {
+	linenr_T	lnum;
+
+	// Delete only the specified signs
+	lnum = buf_delsign(buf, atlnum, sign_id, sign_group);
+	if (lnum == 0)
+	    return FAIL;
+    }
+
+    // When all the signs in a buffer are removed, force recomputing the
+    // number column width (if enabled) in all the windows displaying the
+    // buffer if 'signcolumn' is set to 'number' in that window.
+    if (buf->b_signlist == NULL)
+	may_force_numberwidth_recompute(buf, TRUE);
+
+    return OK;
+}
+
+/*
+ * Unplace the sign at the current cursor line.
+ */
+    static void
+sign_unplace_at_cursor(char_u *groupname)
+{
+    int		id = -1;
+
+    id = buf_findsign_id(curwin->w_buffer, curwin->w_cursor.lnum, groupname);
+    if (id > 0)
+	sign_unplace(id, groupname, curwin->w_buffer, curwin->w_cursor.lnum);
+    else
+	emsg(_(e_missing_sign_number));
+}
+
+/*
+ * Jump to a sign.
+ */
+    static linenr_T
+sign_jump(int sign_id, char_u *sign_group, buf_T *buf)
+{
+    linenr_T	lnum;
+
+    if ((lnum = buf_findsign(buf, sign_id, sign_group)) <= 0)
+    {
+	semsg(_(e_invalid_sign_id_nr), sign_id);
+	return -1;
+    }
+
+    // goto a sign ...
+    if (buf_jump_open_win(buf) != NULL)
+    {			// ... in a current window
+	curwin->w_cursor.lnum = lnum;
+	check_cursor_lnum();
+	beginline(BL_WHITE);
+    }
+    else
+    {			// ... not currently in a window
+	char_u	*cmd;
+
+	if (buf->b_fname == NULL)
+	{
+	    emsg(_(e_cannot_jump_to_buffer_that_does_not_have_name));
+	    return -1;
+	}
+	cmd = alloc(STRLEN(buf->b_fname) + 25);
+	if (cmd == NULL)
+	    return -1;
+	sprintf((char *)cmd, "e +%ld %s", (long)lnum, buf->b_fname);
+	do_cmdline_cmd(cmd);
+	vim_free(cmd);
+    }
+# ifdef FEAT_FOLDING
+    foldOpenCursor();
+# endif
+
+    return lnum;
+}
+
+/*
+ * ":sign define {name} ..." command
+ */
+    static void
+sign_define_cmd(char_u *sign_name, char_u *cmdline)
+{
+    char_u	*arg;
+    char_u	*p = cmdline;
+    char_u	*icon = NULL;
+    char_u	*text = NULL;
+    char_u	*linehl = NULL;
+    char_u	*texthl = NULL;
+    char_u	*culhl = NULL;
+    char_u	*numhl = NULL;
+    int		failed = FALSE;
+
+    // set values for a defined sign.
+    for (;;)
+    {
+	arg = skipwhite(p);
+	if (*arg == NUL)
+	    break;
+	p = skiptowhite_esc(arg);
+	if (STRNCMP(arg, "icon=", 5) == 0)
+	{
+	    arg += 5;
+	    icon = vim_strnsave(arg, p - arg);
+	}
+	else if (STRNCMP(arg, "text=", 5) == 0)
+	{
+	    arg += 5;
+	    text = vim_strnsave(arg, p - arg);
+	}
+	else if (STRNCMP(arg, "linehl=", 7) == 0)
+	{
+	    arg += 7;
+	    linehl = vim_strnsave(arg, p - arg);
+	}
+	else if (STRNCMP(arg, "texthl=", 7) == 0)
+	{
+	    arg += 7;
+	    texthl = vim_strnsave(arg, p - arg);
+	}
+	else if (STRNCMP(arg, "culhl=", 6) == 0)
+	{
+	    arg += 6;
+	    culhl = vim_strnsave(arg, p - arg);
+	}
+	else if (STRNCMP(arg, "numhl=", 6) == 0)
+	{
+	    arg += 6;
+	    numhl = vim_strnsave(arg, p - arg);
+	}
+	else
+	{
+	    semsg(_(e_invalid_argument_str), arg);
+	    failed = TRUE;
+	    break;
+	}
+    }
+
+    if (!failed)
+	sign_define_by_name(sign_name, icon, linehl, text, texthl, culhl, numhl);
+
+    vim_free(icon);
+    vim_free(text);
+    vim_free(linehl);
+    vim_free(texthl);
+    vim_free(culhl);
+    vim_free(numhl);
+}
+
+/*
+ * ":sign place" command
+ */
+    static void
+sign_place_cmd(
+	buf_T		*buf,
+	linenr_T	lnum,
+	char_u		*sign_name,
+	int		id,
+	char_u		*group,
+	int		prio)
+{
+    if (id <= 0)
+    {
+	// List signs placed in a file/buffer
+	//   :sign place file={fname}
+	//   :sign place group={group} file={fname}
+	//   :sign place group=* file={fname}
+	//   :sign place buffer={nr}
+	//   :sign place group={group} buffer={nr}
+	//   :sign place group=* buffer={nr}
+	//   :sign place
+	//   :sign place group={group}
+	//   :sign place group=*
+	if (lnum >= 0 || sign_name != NULL
+		|| (group != NULL && *group == '\0'))
+	    emsg(_(e_invalid_argument));
+	else
+	    sign_list_placed(buf, group);
+    }
+    else
+    {
+	// Place a new sign
+	if (sign_name == NULL || buf == NULL
+		|| (group != NULL && *group == '\0'))
+	{
+	    emsg(_(e_invalid_argument));
+	    return;
+	}
+
+	sign_place(&id, group, sign_name, buf, lnum, prio);
+    }
+}
+
+/*
+ * ":sign unplace" command
+ */
+    static void
+sign_unplace_cmd(
+	buf_T		*buf,
+	linenr_T	lnum,
+	char_u		*sign_name,
+	int		id,
+	char_u		*group)
+{
+    if (lnum >= 0 || sign_name != NULL || (group != NULL && *group == '\0'))
+    {
+	emsg(_(e_invalid_argument));
+	return;
+    }
+
+    if (id == -2)
+    {
+	if (buf != NULL)
+	    // :sign unplace * file={fname}
+	    // :sign unplace * group={group} file={fname}
+	    // :sign unplace * group=* file={fname}
+	    // :sign unplace * buffer={nr}
+	    // :sign unplace * group={group} buffer={nr}
+	    // :sign unplace * group=* buffer={nr}
+	    sign_unplace(0, group, buf, 0);
+	else
+	    // :sign unplace *
+	    // :sign unplace * group={group}
+	    // :sign unplace * group=*
+	    FOR_ALL_BUFFERS(buf)
+		if (buf->b_signlist != NULL)
+		    buf_delete_signs(buf, group);
+    }
+    else
+    {
+	if (buf != NULL)
+	    // :sign unplace {id} file={fname}
+	    // :sign unplace {id} group={group} file={fname}
+	    // :sign unplace {id} group=* file={fname}
+	    // :sign unplace {id} buffer={nr}
+	    // :sign unplace {id} group={group} buffer={nr}
+	    // :sign unplace {id} group=* buffer={nr}
+	    sign_unplace(id, group, buf, 0);
+	else
+	{
+	    if (id == -1)
+	    {
+		// :sign unplace group={group}
+		// :sign unplace group=*
+		sign_unplace_at_cursor(group);
+	    }
+	    else
+	    {
+		// :sign unplace {id}
+		// :sign unplace {id} group={group}
+		// :sign unplace {id} group=*
+		FOR_ALL_BUFFERS(buf)
+		    sign_unplace(id, group, buf, 0);
+	    }
+	}
+    }
+}
+
+/*
+ * Jump to a placed sign commands:
+ *   :sign jump {id} file={fname}
+ *   :sign jump {id} buffer={nr}
+ *   :sign jump {id} group={group} file={fname}
+ *   :sign jump {id} group={group} buffer={nr}
+ */
+    static void
+sign_jump_cmd(
+	buf_T		*buf,
+	linenr_T	lnum,
+	char_u		*sign_name,
+	int		id,
+	char_u		*group)
+{
+    if (sign_name == NULL && group == NULL && id == -1)
+    {
+	emsg(_(e_argument_required));
+	return;
+    }
+
+    if (buf == NULL || (group != NULL && *group == '\0')
+					     || lnum >= 0 || sign_name != NULL)
+    {
+	// File or buffer is not specified or an empty group is used
+	// or a line number or a sign name is specified.
+	emsg(_(e_invalid_argument));
+	return;
+    }
+    (void)sign_jump(id, group, buf);
+}
+
+/*
+ * Parse the command line arguments for the ":sign place", ":sign unplace" and
+ * ":sign jump" commands.
+ * The supported arguments are: line={lnum} name={name} group={group}
+ * priority={prio} and file={fname} or buffer={nr}.
+ */
+    static int
+parse_sign_cmd_args(
+	int	    cmd,
+	char_u	    *arg,
+	char_u	    **sign_name,
+	int	    *signid,
+	char_u	    **group,
+	int	    *prio,
+	buf_T	    **buf,
+	linenr_T    *lnum)
+{
+    char_u	*arg1;
+    char_u	*name;
+    char_u	*filename = NULL;
+    int		lnum_arg = FALSE;
+
+    // first arg could be placed sign id
+    arg1 = arg;
+    if (VIM_ISDIGIT(*arg))
+    {
+	*signid = getdigits(&arg);
+	if (!VIM_ISWHITE(*arg) && *arg != NUL)
+	{
+	    *signid = -1;
+	    arg = arg1;
+	}
+	else
+	    arg = skipwhite(arg);
+    }
+
+    while (*arg != NUL)
+    {
+	if (STRNCMP(arg, "line=", 5) == 0)
+	{
+	    arg += 5;
+	    *lnum = atoi((char *)arg);
+	    arg = skiptowhite(arg);
+	    lnum_arg = TRUE;
+	}
+	else if (STRNCMP(arg, "*", 1) == 0 && cmd == SIGNCMD_UNPLACE)
+	{
+	    if (*signid != -1)
+	    {
+		emsg(_(e_invalid_argument));
+		return FAIL;
+	    }
+	    *signid = -2;
+	    arg = skiptowhite(arg + 1);
+	}
+	else if (STRNCMP(arg, "name=", 5) == 0)
+	{
+	    arg += 5;
+	    name = arg;
+	    arg = skiptowhite(arg);
+	    if (*arg != NUL)
+		*arg++ = NUL;
+	    while (name[0] == '0' && name[1] != NUL)
+		++name;
+	    *sign_name = name;
+	}
+	else if (STRNCMP(arg, "group=", 6) == 0)
+	{
+	    arg += 6;
+	    *group = arg;
+	    arg = skiptowhite(arg);
+	    if (*arg != NUL)
+		*arg++ = NUL;
+	}
+	else if (STRNCMP(arg, "priority=", 9) == 0)
+	{
+	    arg += 9;
+	    *prio = atoi((char *)arg);
+	    arg = skiptowhite(arg);
+	}
+	else if (STRNCMP(arg, "file=", 5) == 0)
+	{
+	    arg += 5;
+	    filename = arg;
+	    *buf = buflist_findname_exp(arg);
+	    break;
+	}
+	else if (STRNCMP(arg, "buffer=", 7) == 0)
+	{
+	    arg += 7;
+	    filename = arg;
+	    *buf = buflist_findnr((int)getdigits(&arg));
+	    if (*skipwhite(arg) != NUL)
+		semsg(_(e_trailing_characters_str), arg);
+	    break;
+	}
+	else
+	{
+	    emsg(_(e_invalid_argument));
+	    return FAIL;
+	}
+	arg = skipwhite(arg);
+    }
+
+    if (filename != NULL && *buf == NULL)
+    {
+	semsg(_(e_invalid_buffer_name_str), filename);
+	return FAIL;
+    }
+
+    // If the filename is not supplied for the sign place or the sign jump
+    // command, then use the current buffer.
+    if (filename == NULL && ((cmd == SIGNCMD_PLACE && lnum_arg)
+						       || cmd == SIGNCMD_JUMP))
+	*buf = curwin->w_buffer;
+
+    return OK;
+}
+
+/*
+ * ":sign" command
+ */
+    void
+ex_sign(exarg_T *eap)
+{
+    char_u	*arg = eap->arg;
+    char_u	*p;
+    int		idx;
+    sign_T	*sp;
+    buf_T	*buf = NULL;
+
+    // Parse the subcommand.
+    p = skiptowhite(arg);
+    idx = sign_cmd_idx(arg, p);
+    if (idx == SIGNCMD_LAST)
+    {
+	semsg(_(e_unknown_sign_command_str), arg);
+	return;
+    }
+    arg = skipwhite(p);
+
+    if (idx <= SIGNCMD_LIST)
+    {
+	// Define, undefine or list signs.
+	if (idx == SIGNCMD_LIST && *arg == NUL)
+	{
+	    // ":sign list": list all defined signs
+	    for (sp = first_sign; sp != NULL && !got_int; sp = sp->sn_next)
+		sign_list_defined(sp);
+	}
+	else if (*arg == NUL)
+	    emsg(_(e_missing_sign_name));
+	else
+	{
+	    char_u	*name;
+
+	    // Isolate the sign name.  If it's a number skip leading zeroes,
+	    // so that "099" and "99" are the same sign.  But keep "0".
+	    p = skiptowhite(arg);
+	    if (*p != NUL)
+		*p++ = NUL;
+	    while (arg[0] == '0' && arg[1] != NUL)
+		++arg;
+	    name = vim_strsave(arg);
+
+	    if (idx == SIGNCMD_DEFINE)
+		sign_define_cmd(name, p);
+	    else if (idx == SIGNCMD_LIST)
+		// ":sign list {name}"
+		sign_list_by_name(name);
+	    else
+		// ":sign undefine {name}"
+		sign_undefine_by_name(name, TRUE);
+
+	    vim_free(name);
+	    return;
+	}
+    }
+    else
+    {
+	int		id = -1;
+	linenr_T	lnum = -1;
+	char_u		*sign_name = NULL;
+	char_u		*group = NULL;
+	int		prio = SIGN_DEF_PRIO;
+
+	// Parse command line arguments
+	if (parse_sign_cmd_args(idx, arg, &sign_name, &id, &group, &prio,
+							  &buf, &lnum) == FAIL)
+	    return;
+
+	if (idx == SIGNCMD_PLACE)
+	    sign_place_cmd(buf, lnum, sign_name, id, group, prio);
+	else if (idx == SIGNCMD_UNPLACE)
+	    sign_unplace_cmd(buf, lnum, sign_name, id, group);
+	else if (idx == SIGNCMD_JUMP)
+	    sign_jump_cmd(buf, lnum, sign_name, id, group);
+    }
+}
+
+/*
+ * Return information about a specified sign
+ */
+    static void
+sign_getinfo(sign_T *sp, dict_T *retdict)
+{
+    char_u	*p;
+
+    dict_add_string(retdict, "name", sp->sn_name);
+    if (sp->sn_icon != NULL)
+	dict_add_string(retdict, "icon", sp->sn_icon);
+    if (sp->sn_text != NULL)
+	dict_add_string(retdict, "text", sp->sn_text);
+    if (sp->sn_line_hl > 0)
+    {
+	p = get_highlight_name_ext(NULL, sp->sn_line_hl - 1, FALSE);
+	if (p == NULL)
+	    p = (char_u *)"NONE";
+	dict_add_string(retdict, "linehl", p);
+    }
+    if (sp->sn_text_hl > 0)
+    {
+	p = get_highlight_name_ext(NULL, sp->sn_text_hl - 1, FALSE);
+	if (p == NULL)
+	    p = (char_u *)"NONE";
+	dict_add_string(retdict, "texthl", p);
+    }
+    if (sp->sn_cul_hl > 0)
+    {
+	p = get_highlight_name_ext(NULL, sp->sn_cul_hl - 1, FALSE);
+	if (p == NULL)
+	    p = (char_u *)"NONE";
+	dict_add_string(retdict, "culhl", p);
+    }
+    if (sp->sn_num_hl > 0)
+    {
+	p = get_highlight_name_ext(NULL, sp->sn_num_hl - 1, FALSE);
+	if (p == NULL)
+	    p = (char_u *)"NONE";
+	dict_add_string(retdict, "numhl", p);
+    }
+}
+
+/*
+ * If 'name' is NULL, return a list of all the defined signs.
+ * Otherwise, return information about the specified sign.
+ */
+    static void
+sign_getlist(char_u *name, list_T *retlist)
+{
+    sign_T	*sp = first_sign;
+    dict_T	*dict;
+
+    if (name != NULL)
+    {
+	sp = sign_find(name, NULL);
+	if (sp == NULL)
+	    return;
+    }
+
+    for (; sp != NULL && !got_int; sp = sp->sn_next)
+    {
+	if ((dict = dict_alloc_id(aid_sign_getlist)) == NULL)
+	    return;
+	if (list_append_dict(retlist, dict) == FAIL)
+	    return;
+	sign_getinfo(sp, dict);
+
+	if (name != NULL)	    // handle only the specified sign
+	    break;
+    }
+}
+
+/*
+ * Returns information about signs placed in a buffer as list of dicts.
+ */
+    void
+get_buffer_signs(buf_T *buf, list_T *l)
+{
+    sign_entry_T	*sign;
+    dict_T		*d;
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if ((d = sign_get_info(sign)) != NULL)
+	    list_append_dict(l, d);
+    }
+}
+
+/*
+ * Return information about all the signs placed in a buffer
+ */
+    static void
+sign_get_placed_in_buf(
+	buf_T		*buf,
+	linenr_T	lnum,
+	int		sign_id,
+	char_u		*sign_group,
+	list_T		*retlist)
+{
+    dict_T		*d;
+    list_T		*l;
+    sign_entry_T	*sign;
+    dict_T		*sdict;
+
+    if ((d = dict_alloc_id(aid_sign_getplaced_dict)) == NULL)
+	return;
+    list_append_dict(retlist, d);
+
+    dict_add_number(d, "bufnr", (long)buf->b_fnum);
+
+    if ((l = list_alloc_id(aid_sign_getplaced_list)) == NULL)
+	return;
+    dict_add_list(d, "signs", l);
+
+    FOR_ALL_SIGNS_IN_BUF(buf, sign)
+    {
+	if (!sign_in_group(sign, sign_group))
+	    continue;
+	if ((lnum == 0 && sign_id == 0)
+		|| (sign_id == 0 && lnum == sign->se_lnum)
+		|| (lnum == 0 && sign_id == sign->se_id)
+		|| (lnum == sign->se_lnum && sign_id == sign->se_id))
+	{
+	    if ((sdict = sign_get_info(sign)) != NULL)
+		list_append_dict(l, sdict);
+	}
+    }
+}
+
+/*
+ * Get a list of signs placed in buffer 'buf'. If 'num' is non-zero, return the
+ * sign placed at the line number. If 'lnum' is zero, return all the signs
+ * placed in 'buf'. If 'buf' is NULL, return signs placed in all the buffers.
+ */
+    static void
+sign_get_placed(
+	buf_T		*buf,
+	linenr_T	lnum,
+	int		sign_id,
+	char_u		*sign_group,
+	list_T		*retlist)
+{
+    if (buf != NULL)
+	sign_get_placed_in_buf(buf, lnum, sign_id, sign_group, retlist);
+    else
+    {
+	FOR_ALL_BUFFERS(buf)
+	    if (buf->b_signlist != NULL)
+		sign_get_placed_in_buf(buf, 0, sign_id, sign_group, retlist);
+    }
+}
+
+# if defined(FEAT_SIGN_ICONS) || defined(PROTO)
+/*
+ * Allocate the icons.  Called when the GUI has started.  Allows defining
+ * signs before it starts.
+ */
+    void
+sign_gui_started(void)
+{
+    sign_T	*sp;
+
+    FOR_ALL_SIGNS(sp)
+	if (sp->sn_icon != NULL)
+	    sp->sn_image = gui_mch_register_sign(sp->sn_icon);
+}
+# endif
+
+/*
+ * List one sign.
+ */
+    static void
+sign_list_defined(sign_T *sp)
+{
+    char_u	*p;
+
+    smsg("sign %s", sp->sn_name);
+    if (sp->sn_icon != NULL)
+    {
+	msg_puts(" icon=");
+	msg_outtrans(sp->sn_icon);
+# ifdef FEAT_SIGN_ICONS
+	if (sp->sn_image == NULL)
+	    msg_puts(_(" (NOT FOUND)"));
+# else
+	msg_puts(_(" (not supported)"));
+# endif
+    }
+    if (sp->sn_text != NULL)
+    {
+	msg_puts(" text=");
+	msg_outtrans(sp->sn_text);
+    }
+    if (sp->sn_line_hl > 0)
+    {
+	msg_puts(" linehl=");
+	p = get_highlight_name_ext(NULL, sp->sn_line_hl - 1, FALSE);
+	if (p == NULL)
+	    msg_puts("NONE");
+	else
+	    msg_puts((char *)p);
+    }
+    if (sp->sn_text_hl > 0)
+    {
+	msg_puts(" texthl=");
+	p = get_highlight_name_ext(NULL, sp->sn_text_hl - 1, FALSE);
+	if (p == NULL)
+	    msg_puts("NONE");
+	else
+	    msg_puts((char *)p);
+    }
+    if (sp->sn_cul_hl > 0)
+    {
+	msg_puts(" culhl=");
+	p = get_highlight_name_ext(NULL, sp->sn_cul_hl - 1, FALSE);
+	if (p == NULL)
+	    msg_puts("NONE");
+	else
+	    msg_puts((char *)p);
+    }
+    if (sp->sn_num_hl > 0)
+    {
+	msg_puts(" numhl=");
+	p = get_highlight_name_ext(NULL, sp->sn_num_hl - 1, FALSE);
+	if (p == NULL)
+	    msg_puts("NONE");
+	else
+	    msg_puts((char *)p);
+    }
+}
+
+/*
+ * Undefine a sign and free its memory.
+ */
+    static void
+sign_undefine(sign_T *sp, sign_T *sp_prev)
+{
+    vim_free(sp->sn_name);
+    vim_free(sp->sn_icon);
+# ifdef FEAT_SIGN_ICONS
+    if (sp->sn_image != NULL)
+    {
+	out_flush();
+	gui_mch_destroy_sign(sp->sn_image);
+    }
+# endif
+    vim_free(sp->sn_text);
+    if (sp_prev == NULL)
+	first_sign = sp->sn_next;
+    else
+	sp_prev->sn_next = sp->sn_next;
+    vim_free(sp);
+}
+
+# if defined(FEAT_SIGN_ICONS) || defined(PROTO)
+    void *
+sign_get_image(
+    int		typenr)		// the attribute which may have a sign
+{
+    sign_T	*sp;
+
+    FOR_ALL_SIGNS(sp)
+	if (sp->sn_typenr == typenr)
+	    return sp->sn_image;
+    return NULL;
+}
+# endif
+
+/*
+ * Undefine/free all signs.
+ */
+    void
+free_signs(void)
+{
+    while (first_sign != NULL)
+	sign_undefine(first_sign, NULL);
+}
+
+static enum
+{
+    EXP_SUBCMD,		// expand :sign sub-commands
+    EXP_DEFINE,		// expand :sign define {name} args
+    EXP_PLACE,		// expand :sign place {id} args
+    EXP_LIST,		// expand :sign place args
+    EXP_UNPLACE,	// expand :sign unplace"
+    EXP_SIGN_NAMES,	// expand with name of placed signs
+    EXP_SIGN_GROUPS	// expand with name of placed sign groups
+} expand_what;
+
+/*
+ * Return the n'th sign name (used for command line completion)
+ */
+    static char_u *
+get_nth_sign_name(int idx)
+{
+    int		current_idx;
+    sign_T	*sp;
+
+    // Complete with name of signs already defined
+    current_idx = 0;
+    FOR_ALL_SIGNS(sp)
+	if (current_idx++ == idx)
+	    return sp->sn_name;
+    return NULL;
+}
+
+/*
+ * Return the n'th sign group name (used for command line completion)
+ */
+    static char_u *
+get_nth_sign_group_name(int idx)
+{
+    int		current_idx;
+    int		todo;
+    hashitem_T	*hi;
+    signgroup_T	*group;
+
+    // Complete with name of sign groups already defined
+    current_idx = 0;
+    todo = (int)sg_table.ht_used;
+    FOR_ALL_HASHTAB_ITEMS(&sg_table, hi, todo)
+    {
+	if (!HASHITEM_EMPTY(hi))
+	{
+	    --todo;
+	    if (current_idx++ == idx)
+	    {
+		group = HI2SG(hi);
+		return group->sg_name;
+	    }
+	}
+    }
+    return NULL;
+}
+
+/*
+ * Function given to ExpandGeneric() to obtain the sign command
+ * expansion.
+ */
+    char_u *
+get_sign_name(expand_T *xp UNUSED, int idx)
+{
+    switch (expand_what)
+    {
+    case EXP_SUBCMD:
+	return (char_u *)cmds[idx];
+    case EXP_DEFINE:
+	{
+	    char *define_arg[] =
+	    {
+		"culhl=", "icon=", "linehl=", "numhl=", "text=", "texthl=", NULL
+	    };
+	    return (char_u *)define_arg[idx];
+	}
+    case EXP_PLACE:
+	{
+	    char *place_arg[] =
+	    {
+		"line=", "name=", "group=", "priority=", "file=",
+		"buffer=", NULL
+	    };
+	    return (char_u *)place_arg[idx];
+	}
+    case EXP_LIST:
+	{
+	    char *list_arg[] =
+	    {
+		"group=", "file=", "buffer=", NULL
+	    };
+	    return (char_u *)list_arg[idx];
+	}
+    case EXP_UNPLACE:
+	{
+	    char *unplace_arg[] = { "group=", "file=", "buffer=", NULL };
+	    return (char_u *)unplace_arg[idx];
+	}
+    case EXP_SIGN_NAMES:
+	return get_nth_sign_name(idx);
+    case EXP_SIGN_GROUPS:
+	return get_nth_sign_group_name(idx);
+    default:
+	return NULL;
+    }
+}
+
+/*
+ * Handle command line completion for :sign command.
+ */
+    void
+set_context_in_sign_cmd(expand_T *xp, char_u *arg)
+{
+    char_u	*p;
+    char_u	*end_subcmd;
+    char_u	*last;
+    int		cmd_idx;
+    char_u	*begin_subcmd_args;
+
+    // Default: expand subcommands.
+    xp->xp_context = EXPAND_SIGN;
+    expand_what = EXP_SUBCMD;
+    xp->xp_pattern = arg;
+
+    end_subcmd = skiptowhite(arg);
+    if (*end_subcmd == NUL)
+	// expand subcmd name
+	// :sign {subcmd}<CTRL-D>
+	return;
+
+    cmd_idx = sign_cmd_idx(arg, end_subcmd);
+
+    // :sign {subcmd} {subcmd_args}
+    //		      |
+    //		      begin_subcmd_args
+    begin_subcmd_args = skipwhite(end_subcmd);
+
+    // expand last argument of subcmd
+
+    // :sign define {name} {args}...
+    //		    |
+    //		    p
+
+    // Loop until reaching last argument.
+    p = begin_subcmd_args;
+    do
+    {
+	p = skipwhite(p);
+	last = p;
+	p = skiptowhite(p);
+    } while (*p != NUL);
+
+    p = vim_strchr(last, '=');
+
+    // :sign define {name} {args}... {last}=
+    //				     |	   |
+    //				  last	   p
+    if (p == NULL)
+    {
+	// Expand last argument name (before equal sign).
+	xp->xp_pattern = last;
+	switch (cmd_idx)
+	{
+	    case SIGNCMD_DEFINE:
+		expand_what = EXP_DEFINE;
+		break;
+	    case SIGNCMD_PLACE:
+		// List placed signs
+		if (VIM_ISDIGIT(*begin_subcmd_args))
+		    //   :sign place {id} {args}...
+		    expand_what = EXP_PLACE;
+		else
+		    //   :sign place {args}...
+		    expand_what = EXP_LIST;
+		break;
+	    case SIGNCMD_LIST:
+	    case SIGNCMD_UNDEFINE:
+		// :sign list <CTRL-D>
+		// :sign undefine <CTRL-D>
+		expand_what = EXP_SIGN_NAMES;
+		break;
+	    case SIGNCMD_JUMP:
+	    case SIGNCMD_UNPLACE:
+		expand_what = EXP_UNPLACE;
+		break;
+	    default:
+		xp->xp_context = EXPAND_NOTHING;
+	}
+    }
+    else
+    {
+	// Expand last argument value (after equal sign).
+	xp->xp_pattern = p + 1;
+	switch (cmd_idx)
+	{
+	    case SIGNCMD_DEFINE:
+		if (STRNCMP(last, "texthl", 6) == 0
+			|| STRNCMP(last, "linehl", 6) == 0
+			|| STRNCMP(last, "culhl", 5) == 0
+			|| STRNCMP(last, "numhl", 5) == 0)
+		    xp->xp_context = EXPAND_HIGHLIGHT;
+		else if (STRNCMP(last, "icon", 4) == 0)
+		    xp->xp_context = EXPAND_FILES;
+		else
+		    xp->xp_context = EXPAND_NOTHING;
+		break;
+	    case SIGNCMD_PLACE:
+		if (STRNCMP(last, "name", 4) == 0)
+		    expand_what = EXP_SIGN_NAMES;
+		else if (STRNCMP(last, "group", 5) == 0)
+		    expand_what = EXP_SIGN_GROUPS;
+		else if (STRNCMP(last, "file", 4) == 0)
+		    xp->xp_context = EXPAND_BUFFERS;
+		else
+		    xp->xp_context = EXPAND_NOTHING;
+		break;
+	    case SIGNCMD_UNPLACE:
+	    case SIGNCMD_JUMP:
+		if (STRNCMP(last, "group", 5) == 0)
+		    expand_what = EXP_SIGN_GROUPS;
+		else if (STRNCMP(last, "file", 4) == 0)
+		    xp->xp_context = EXPAND_BUFFERS;
+		else
+		    xp->xp_context = EXPAND_NOTHING;
+		break;
+	    default:
+		xp->xp_context = EXPAND_NOTHING;
+	}
+    }
+}
+
+/*
+ * Define a sign using the attributes in 'dict'. Returns 0 on success and -1 on
+ * failure.
+ */
+    static int
+sign_define_from_dict(char_u *name_arg, dict_T *dict)
+{
+    char_u	*name = NULL;
+    char_u	*icon = NULL;
+    char_u	*linehl = NULL;
+    char_u	*text = NULL;
+    char_u	*texthl = NULL;
+    char_u	*culhl = NULL;
+    char_u	*numhl = NULL;
+    int		retval = -1;
+
+    if (name_arg == NULL)
+    {
+	if (dict == NULL)
+	    return -1;
+	name = dict_get_string(dict, "name", TRUE);
+    }
+    else
+	name = vim_strsave(name_arg);
+    if (name == NULL || name[0] == NUL)
+	goto cleanup;
+    if (dict != NULL)
+    {
+	icon = dict_get_string(dict, "icon", TRUE);
+	linehl = dict_get_string(dict, "linehl", TRUE);
+	text = dict_get_string(dict, "text", TRUE);
+	texthl = dict_get_string(dict, "texthl", TRUE);
+	culhl = dict_get_string(dict, "culhl", TRUE);
+	numhl = dict_get_string(dict, "numhl", TRUE);
+    }
+
+    if (sign_define_by_name(name, icon, linehl, text, texthl, culhl, numhl) == OK)
+	retval = 0;
+
+cleanup:
+    vim_free(name);
+    vim_free(icon);
+    vim_free(linehl);
+    vim_free(text);
+    vim_free(texthl);
+    vim_free(culhl);
+    vim_free(numhl);
+
+    return retval;
+}
+
+/*
+ * Define multiple signs using attributes from list 'l' and store the return
+ * values in 'retlist'.
+ */
+    static void
+sign_define_multiple(list_T *l, list_T *retlist)
+{
+    listitem_T	*li;
+    int		retval;
+
+    FOR_ALL_LIST_ITEMS(l, li)
+    {
+	retval = -1;
+	if (li->li_tv.v_type == VAR_DICT)
+	    retval = sign_define_from_dict(NULL, li->li_tv.vval.v_dict);
+	else
+	    emsg(_(e_dictionary_required));
+	list_append_number(retlist, retval);
+    }
+}
+
+/*
+ * "sign_define()" function
+ */
+    void
+f_sign_define(typval_T *argvars, typval_T *rettv)
+{
+    char_u	*name;
+
+    if (in_vim9script()
+	    && (check_for_string_or_list_arg(argvars, 0) == FAIL
+		|| check_for_opt_dict_arg(argvars, 1) == FAIL))
+	return;
+
+    if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_UNKNOWN)
+    {
+	// Define multiple signs
+	if (rettv_list_alloc(rettv) == FAIL)
+	    return;
+
+	sign_define_multiple(argvars[0].vval.v_list, rettv->vval.v_list);
+	return;
+    }
+
+    // Define a single sign
+    rettv->vval.v_number = -1;
+
+    name = tv_get_string_chk(&argvars[0]);
+    if (name == NULL)
+	return;
+
+    if (check_for_opt_dict_arg(argvars, 1) == FAIL)
+	return;
+
+    rettv->vval.v_number = sign_define_from_dict(name,
+	    argvars[1].v_type == VAR_DICT ? argvars[1].vval.v_dict : NULL);
+}
+
+/*
+ * "sign_getdefined()" function
+ */
+    void
+f_sign_getdefined(typval_T *argvars, typval_T *rettv)
+{
+    char_u	*name = NULL;
+
+    if (rettv_list_alloc_id(rettv, aid_sign_getdefined) == FAIL)
+	return;
+
+    if (in_vim9script() && check_for_opt_string_arg(argvars, 0) == FAIL)
+	return;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+	name = tv_get_string(&argvars[0]);
+
+    sign_getlist(name, rettv->vval.v_list);
+}
+
+/*
+ * "sign_getplaced()" function
+ */
+    void
+f_sign_getplaced(typval_T *argvars, typval_T *rettv)
+{
+    buf_T	*buf = NULL;
+    dict_T	*dict;
+    dictitem_T	*di;
+    linenr_T	lnum = 0;
+    int		sign_id = 0;
+    char_u	*group = NULL;
+    int		notanum = FALSE;
+
+    if (rettv_list_alloc_id(rettv, aid_sign_getplaced) == FAIL)
+	return;
+
+    if (in_vim9script()
+	    && (check_for_opt_buffer_arg(argvars, 0) == FAIL
+		|| (argvars[0].v_type != VAR_UNKNOWN
+		    && check_for_opt_dict_arg(argvars, 1) == FAIL)))
+	return;
+
+    if (argvars[0].v_type != VAR_UNKNOWN)
+    {
+	// get signs placed in the specified buffer
+	buf = get_buf_arg(&argvars[0]);
+	if (buf == NULL)
+	    return;
+
+	if (argvars[1].v_type != VAR_UNKNOWN)
+	{
+	    if (check_for_nonnull_dict_arg(argvars, 1) == FAIL)
+		return;
+	    dict = argvars[1].vval.v_dict;
+	    if ((di = dict_find(dict, (char_u *)"lnum", -1)) != NULL)
+	    {
+		// get signs placed at this line
+		(void)tv_get_number_chk(&di->di_tv, &notanum);
+		if (notanum)
+		    return;
+		lnum = tv_get_lnum(&di->di_tv);
+	    }
+	    if ((di = dict_find(dict, (char_u *)"id", -1)) != NULL)
+	    {
+		// get sign placed with this identifier
+		sign_id = (int)tv_get_number_chk(&di->di_tv, &notanum);
+		if (notanum)
+		    return;
+	    }
+	    if ((di = dict_find(dict, (char_u *)"group", -1)) != NULL)
+	    {
+		group = tv_get_string_chk(&di->di_tv);
+		if (group == NULL)
+		    return;
+		if (*group == '\0')	// empty string means global group
+		    group = NULL;
+	    }
+	}
+    }
+
+    sign_get_placed(buf, lnum, sign_id, group, rettv->vval.v_list);
+}
+
+/*
+ * "sign_jump()" function
+ */
+    void
+f_sign_jump(typval_T *argvars, typval_T *rettv)
+{
+    int		sign_id;
+    char_u	*sign_group = NULL;
+    buf_T	*buf;
+    int		notanum = FALSE;
+
+    rettv->vval.v_number = -1;
+
+    if (in_vim9script()
+	    && (check_for_number_arg(argvars, 0) == FAIL
+		|| check_for_string_arg(argvars, 1) == FAIL
+		|| check_for_buffer_arg(argvars, 2) == FAIL))
+	return;
+
+    // Sign identifier
+    sign_id = (int)tv_get_number_chk(&argvars[0], &notanum);
+    if (notanum)
+	return;
+    if (sign_id <= 0)
+    {
+	emsg(_(e_invalid_argument));
+	return;
+    }
+
+    // Sign group
+    sign_group = tv_get_string_chk(&argvars[1]);
+    if (sign_group == NULL)
+	return;
+    if (sign_group[0] == '\0')
+	sign_group = NULL;			// global sign group
+    else
+    {
+	sign_group = vim_strsave(sign_group);
+	if (sign_group == NULL)
+	    return;
+    }
+
+    // Buffer to place the sign
+    buf = get_buf_arg(&argvars[2]);
+    if (buf == NULL)
+	goto cleanup;
+
+    rettv->vval.v_number = sign_jump(sign_id, sign_group, buf);
+
+cleanup:
+    vim_free(sign_group);
+}
+
+/*
+ * Place a new sign using the values specified in dict 'dict'. Returns the sign
+ * identifier if successfully placed, otherwise returns 0.
+ */
+    static int
+sign_place_from_dict(
+	typval_T	*id_tv,
+	typval_T	*group_tv,
+	typval_T	*name_tv,
+	typval_T	*buf_tv,
+	dict_T		*dict)
+{
+    int		sign_id = 0;
+    char_u	*group = NULL;
+    char_u	*sign_name = NULL;
+    buf_T	*buf = NULL;
+    dictitem_T	*di;
+    linenr_T	lnum = 0;
+    int		prio = SIGN_DEF_PRIO;
+    int		notanum = FALSE;
+    int		ret_sign_id = -1;
+
+    // sign identifier
+    if (id_tv == NULL)
+    {
+	di = dict_find(dict, (char_u *)"id", -1);
+	if (di != NULL)
+	    id_tv = &di->di_tv;
+    }
+    if (id_tv == NULL)
+	sign_id = 0;
+    else
+    {
+	sign_id = tv_get_number_chk(id_tv, &notanum);
+	if (notanum)
+	    return -1;
+	if (sign_id < 0)
+	{
+	    emsg(_(e_invalid_argument));
+	    return -1;
+	}
+    }
+
+    // sign group
+    if (group_tv == NULL)
+    {
+	di = dict_find(dict, (char_u *)"group", -1);
+	if (di != NULL)
+	    group_tv = &di->di_tv;
+    }
+    if (group_tv == NULL)
+	group = NULL;				// global group
+    else
+    {
+	group = tv_get_string_chk(group_tv);
+	if (group == NULL)
+	    goto cleanup;
+	if (group[0] == '\0')			// global sign group
+	    group = NULL;
+	else
+	{
+	    group = vim_strsave(group);
+	    if (group == NULL)
+		return -1;
+	}
+    }
+
+    // sign name
+    if (name_tv == NULL)
+    {
+	di = dict_find(dict, (char_u *)"name", -1);
+	if (di != NULL)
+	    name_tv = &di->di_tv;
+    }
+    if (name_tv == NULL)
+	goto cleanup;
+    sign_name = tv_get_string_chk(name_tv);
+    if (sign_name == NULL)
+	goto cleanup;
+
+    // buffer to place the sign
+    if (buf_tv == NULL)
+    {
+	di = dict_find(dict, (char_u *)"buffer", -1);
+	if (di != NULL)
+	    buf_tv = &di->di_tv;
+    }
+    if (buf_tv == NULL)
+	goto cleanup;
+    buf = get_buf_arg(buf_tv);
+    if (buf == NULL)
+	goto cleanup;
+
+    // line number of the sign
+    di = dict_find(dict, (char_u *)"lnum", -1);
+    if (di != NULL)
+    {
+	lnum = tv_get_lnum(&di->di_tv);
+	if (lnum <= 0)
+	{
+	    emsg(_(e_invalid_argument));
+	    goto cleanup;
+	}
+    }
+
+    // sign priority
+    di = dict_find(dict, (char_u *)"priority", -1);
+    if (di != NULL)
+    {
+	prio = (int)tv_get_number_chk(&di->di_tv, &notanum);
+	if (notanum)
+	    goto cleanup;
+    }
+
+    if (sign_place(&sign_id, group, sign_name, buf, lnum, prio) == OK)
+	ret_sign_id = sign_id;
+
+cleanup:
+    vim_free(group);
+
+    return ret_sign_id;
+}
+
+/*
+ * "sign_place()" function
+ */
+    void
+f_sign_place(typval_T *argvars, typval_T *rettv)
+{
+    dict_T	*dict = NULL;
+
+    rettv->vval.v_number = -1;
+
+    if (in_vim9script()
+	    && (check_for_number_arg(argvars, 0) == FAIL
+		|| check_for_string_arg(argvars, 1) == FAIL
+		|| check_for_string_arg(argvars, 2) == FAIL
+		|| check_for_buffer_arg(argvars, 3) == FAIL
+		|| check_for_opt_dict_arg(argvars, 4) == FAIL))
+	return;
+
+    if (argvars[4].v_type != VAR_UNKNOWN)
+    {
+	if (check_for_nonnull_dict_arg(argvars, 4) == FAIL)
+	    return;
+	dict = argvars[4].vval.v_dict;
+    }
+
+    rettv->vval.v_number = sign_place_from_dict(&argvars[0], &argvars[1],
+					&argvars[2], &argvars[3], dict);
+}
+
+/*
+ * "sign_placelist()" function.  Place multiple signs.
+ */
+    void
+f_sign_placelist(typval_T *argvars, typval_T *rettv)
+{
+    listitem_T	*li;
+    int		sign_id;
+
+    if (rettv_list_alloc(rettv) == FAIL)
+	return;
+
+    if (in_vim9script() && check_for_list_arg(argvars, 0) == FAIL)
+	return;
+
+    if (check_for_list_arg(argvars, 0) == FAIL)
+	return;
+
+    // Process the List of sign attributes
+    FOR_ALL_LIST_ITEMS(argvars[0].vval.v_list, li)
+    {
+	sign_id = -1;
+	if (li->li_tv.v_type == VAR_DICT)
+	    sign_id = sign_place_from_dict(NULL, NULL, NULL, NULL,
+						li->li_tv.vval.v_dict);
+	else
+	    emsg(_(e_dictionary_required));
+	list_append_number(rettv->vval.v_list, sign_id);
+    }
+}
+
+/*
+ * Undefine multiple signs
+ */
+    static void
+sign_undefine_multiple(list_T *l, list_T *retlist)
+{
+    char_u	*name;
+    listitem_T	*li;
+    int		retval;
+
+    FOR_ALL_LIST_ITEMS(l, li)
+    {
+	retval = -1;
+	name = tv_get_string_chk(&li->li_tv);
+	if (name != NULL && (sign_undefine_by_name(name, TRUE) == OK))
+	    retval = 0;
+	list_append_number(retlist, retval);
+    }
+}
+
+/*
+ * "sign_undefine()" function
+ */
+    void
+f_sign_undefine(typval_T *argvars, typval_T *rettv)
+{
+    char_u *name;
+
+    if (in_vim9script()
+	    && check_for_opt_string_or_list_arg(argvars, 0) == FAIL)
+	return;
+
+    if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_UNKNOWN)
+    {
+	// Undefine multiple signs
+	if (rettv_list_alloc(rettv) == FAIL)
+	    return;
+
+	sign_undefine_multiple(argvars[0].vval.v_list, rettv->vval.v_list);
+	return;
+    }
+
+    rettv->vval.v_number = -1;
+
+    if (argvars[0].v_type == VAR_UNKNOWN)
+    {
+	// Free all the signs
+	free_signs();
+	rettv->vval.v_number = 0;
+    }
+    else
+    {
+	// Free only the specified sign
+	name = tv_get_string_chk(&argvars[0]);
+	if (name == NULL)
+	    return;
+
+	if (sign_undefine_by_name(name, TRUE) == OK)
+	    rettv->vval.v_number = 0;
+    }
+}
+
+/*
+ * Unplace the sign with attributes specified in 'dict'. Returns 0 on success
+ * and -1 on failure.
+ */
+    static int
+sign_unplace_from_dict(typval_T *group_tv, dict_T *dict)
+{
+    dictitem_T	*di;
+    int		sign_id = 0;
+    buf_T	*buf = NULL;
+    char_u	*group = NULL;
+    int		retval = -1;
+
+    // sign group
+    if (group_tv != NULL)
+	group = tv_get_string(group_tv);
+    else
+	group = dict_get_string(dict, "group", FALSE);
+    if (group != NULL)
+    {
+	if (group[0] == '\0')			// global sign group
+	    group = NULL;
+	else
+	{
+	    group = vim_strsave(group);
+	    if (group == NULL)
+		return -1;
+	}
+    }
+
+    if (dict != NULL)
+    {
+	if ((di = dict_find(dict, (char_u *)"buffer", -1)) != NULL)
+	{
+	    buf = get_buf_arg(&di->di_tv);
+	    if (buf == NULL)
+		goto cleanup;
+	}
+	if (dict_has_key(dict, "id"))
+	{
+	    sign_id = dict_get_number(dict, "id");
+	    if (sign_id <= 0)
+	    {
+		emsg(_(e_invalid_argument));
+		goto cleanup;
+	    }
+	}
+    }
+
+    if (buf == NULL)
+    {
+	// Delete the sign in all the buffers
+	retval = 0;
+	FOR_ALL_BUFFERS(buf)
+	    if (sign_unplace(sign_id, group, buf, 0) != OK)
+		retval = -1;
+    }
+    else if (sign_unplace(sign_id, group, buf, 0) == OK)
+	retval = 0;
+
+cleanup:
+    vim_free(group);
+
+    return retval;
+}
+
+    sign_entry_T *
+get_first_valid_sign(win_T *wp)
+{
+    sign_entry_T *sign = wp->w_buffer->b_signlist;
+
+# ifdef FEAT_PROP_POPUP
+    while (sign != NULL && !sign_group_for_window(sign, wp))
+	sign = sign->se_next;
+# endif
+    return sign;
+}
+
+/*
+ * Return TRUE when window "wp" has a column to draw signs in.
+ */
+     int
+signcolumn_on(win_T *wp)
+{
+    // If 'signcolumn' is set to 'number', signs are displayed in the 'number'
+    // column (if present). Otherwise signs are to be displayed in the sign
+    // column.
+    if (*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u')
+	return get_first_valid_sign(wp) != NULL && !wp->w_p_nu && !wp->w_p_rnu;
+
+    if (*wp->w_p_scl == 'n')
+	return FALSE;
+    if (*wp->w_p_scl == 'y')
+	return TRUE;
+    return (get_first_valid_sign(wp) != NULL
+# ifdef FEAT_NETBEANS_INTG
+			|| wp->w_buffer->b_has_sign_column
+# endif
+		    );
+}
+
+/*
+ * "sign_unplace()" function
+ */
+    void
+f_sign_unplace(typval_T *argvars, typval_T *rettv)
+{
+    dict_T	*dict = NULL;
+
+    rettv->vval.v_number = -1;
+
+    if ((check_for_string_arg(argvars, 0) == FAIL
+		|| check_for_opt_dict_arg(argvars, 1) == FAIL))
+	return;
+
+    if (argvars[1].v_type != VAR_UNKNOWN)
+	dict = argvars[1].vval.v_dict;
+
+    rettv->vval.v_number = sign_unplace_from_dict(&argvars[0], dict);
+}
+
+/*
+ * "sign_unplacelist()" function
+ */
+    void
+f_sign_unplacelist(typval_T *argvars, typval_T *rettv)
+{
+    listitem_T	*li;
+    int		retval;
+
+    if (rettv_list_alloc(rettv) == FAIL)
+	return;
+
+    if (in_vim9script() && check_for_list_arg(argvars, 0) == FAIL)
+	return;
+
+    if (check_for_list_arg(argvars, 0) == FAIL)
+	return;
+
+    FOR_ALL_LIST_ITEMS(argvars[0].vval.v_list, li)
+    {
+	retval = -1;
+	if (li->li_tv.v_type == VAR_DICT)
+	    retval = sign_unplace_from_dict(NULL, li->li_tv.vval.v_dict);
+	else
+	    emsg(_(e_dictionary_required));
+	list_append_number(rettv->vval.v_list, retval);
+    }
+}
+
+#endif // FEAT_SIGNS