+static size_t
+html_tbl_sulen(const struct roffsu *su, void *arg)
+{
+ if (su->scale < 0.0)
+ return 0;
+
+ switch (su->unit) {
+ case SCALE_FS: /* 2^16 basic units */
+ return su->scale * 65536.0 / 24.0;
+ case SCALE_IN: /* 10 characters per inch */
+ return su->scale * 10.0;
+ case SCALE_CM: /* 2.54 cm per inch */
+ return su->scale * 10.0 / 2.54;
+ case SCALE_PC: /* 6 pica per inch */
+ case SCALE_VS:
+ return su->scale * 10.0 / 6.0;
+ case SCALE_EN:
+ case SCALE_EM:
+ return su->scale;
+ case SCALE_PT: /* 12 points per pica */
+ return su->scale * 10.0 / 6.0 / 12.0;
+ case SCALE_BU: /* 24 basic units per character */
+ return su->scale / 24.0;
+ case SCALE_MM: /* 1/1000 inch */
+ return su->scale / 100.0;
+ default:
+ abort();
+ }