diff --git a/src/evalfunc.c b/src/evalfunc.c
index c025a34..780458a 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -430,6 +430,7 @@
 static void f_tolower(typval_T *argvars, typval_T *rettv);
 static void f_toupper(typval_T *argvars, typval_T *rettv);
 static void f_tr(typval_T *argvars, typval_T *rettv);
+static void f_trim(typval_T *argvars, typval_T *rettv);
 #ifdef FEAT_FLOAT
 static void f_trunc(typval_T *argvars, typval_T *rettv);
 #endif
@@ -899,6 +900,7 @@
     {"tolower",		1, 1, f_tolower},
     {"toupper",		1, 1, f_toupper},
     {"tr",		3, 3, f_tr},
+    {"trim",		1, 2, f_trim},
 #ifdef FEAT_FLOAT
     {"trunc",		1, 1, f_trunc},
 #endif
@@ -5539,7 +5541,7 @@
 	return;
 #ifdef FEAT_GUI
     if (gui.in_use)
-	gui_mch_get_winpos(&x, &y);
+	(void)gui_mch_get_winpos(&x, &y);
 # if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
     else
 # endif
@@ -13203,6 +13205,72 @@
     rettv->vval.v_string = ga.ga_data;
 }
 
+/*
+ * "trim({expr})" function
+ */
+    static void
+f_trim(typval_T *argvars, typval_T *rettv)
+{
+    char_u	buf1[NUMBUFLEN];
+    char_u	buf2[NUMBUFLEN];
+    char_u	*head = get_tv_string_buf_chk(&argvars[0], buf1);
+    char_u	*mask = NULL;
+    char_u	*tail;
+    char_u	*prev;
+    char_u	*p;
+    int		c1;
+
+    rettv->v_type = VAR_STRING;
+    if (head == NULL)
+    {
+	rettv->vval.v_string = NULL;
+	return;
+    }
+
+    if (argvars[1].v_type == VAR_STRING)
+	mask = get_tv_string_buf_chk(&argvars[1], buf2);
+
+    while (*head != NUL)
+    {
+	c1 = PTR2CHAR(head);
+	if (mask == NULL)
+	{
+	    if (c1 > ' ' && c1 != 0xa0)
+		break;
+	}
+	else
+	{
+	    for (p = mask; *p != NUL; MB_PTR_ADV(p))
+		if (c1 == PTR2CHAR(p))
+		    break;
+	    if (*p == NUL)
+		break;
+	}
+	MB_PTR_ADV(head);
+    }
+
+    for (tail = head + STRLEN(head); tail > head; tail = prev)
+    {
+	prev = tail;
+	MB_PTR_BACK(head, prev);
+	c1 = PTR2CHAR(prev);
+	if (mask == NULL)
+	{
+	    if (c1 > ' ' && c1 != 0xa0)
+		break;
+	}
+	else
+	{
+	    for (p = mask; *p != NUL; MB_PTR_ADV(p))
+		if (c1 == PTR2CHAR(p))
+		    break;
+	    if (*p == NUL)
+		break;
+	}
+    }
+    rettv->vval.v_string = vim_strnsave(head, (int)(tail - head));
+}
+
 #ifdef FEAT_FLOAT
 /*
  * "trunc({float})" function