add
diff --git a/src/cmd/htmlroff/t11.c b/src/cmd/htmlroff/t11.c
new file mode 100644
index 0000000..53d68aa
--- /dev/null
+++ b/src/cmd/htmlroff/t11.c
@@ -0,0 +1,107 @@
+#include "a.h"
+
+/*
+ * 11. Local Horizontal and Vertical Motions, and the Width Function.
+ */
+
+int
+e_0(void)
+{
+ /* digit-width space */
+ return ' ';
+}
+
+int
+dv(int d)
+{
+ Rune sub[6];
+
+ d += getnr(L(".dv"));
+ nr(L(".dv"), d);
+
+ runestrcpy(sub, L("<sub>"));
+ sub[0] = Ult;
+ sub[4] = Ugt;
+ if(d < 0){
+ sub[3] = 'p';
+ ihtml(L(".dv"), sub);
+ }else if(d > 0)
+ ihtml(L(".dv"), sub);
+ else
+ ihtml(L(".dv"), nil);
+ return 0;
+}
+
+int
+e_v(void)
+{
+ dv(eval(getqarg()));
+ return 0;
+}
+
+int
+e_u(void)
+{
+ dv(eval(L("-0.5m")));
+ return 0;
+}
+
+int
+e_d(void)
+{
+ dv(eval(L("0.5m")));
+ return 0;
+}
+
+int
+e_r(void)
+{
+ dv(eval(L("-1m")));
+ return 0;
+}
+
+int
+e_h(void)
+{
+ getqarg();
+ return 0;
+}
+
+int
+e_w(void)
+{
+ Rune *a;
+ Rune buf[40];
+
+ a = getqarg();
+ runesnprint(buf, sizeof buf, "%ld", runestrlen(a));
+ pushinputstring(buf);
+ nr(L("st"), 0);
+ nr(L("sb"), 0);
+ nr(L("ct"), 0);
+ return 0;
+}
+
+int
+e_k(void)
+{
+ getname();
+ warn("%Ck not available", backslash);
+ return 0;
+}
+
+void
+t11init(void)
+{
+ addesc('|', e_nop, 0);
+ addesc('^', e_nop, 0);
+ addesc('v', e_v, 0);
+ addesc('h', e_h, 0);
+ addesc('w', e_w, 0);
+ addesc('0', e_0, 0);
+ addesc('u', e_u, 0);
+ addesc('d', e_d, 0);
+ addesc('r', e_r, 0);
+ addesc('k', e_k, 0);
+}
+
