dimensions can now be specified in micrometers (um)

test/um

@@ -0,0 +1,85 @@
+#!/bin/sh
+. ./Common
+
+###############################################################################
+
+fped "um: iprint micrometers"  <<EOF
+%iprint 100um
+EOF
+expect <<EOF
+100um
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: add mm + um"  <<EOF
+%iprint 1mm + 100 um
+EOF
+expect <<EOF
+1.1mm
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: subtract mil - um"  <<EOF
+%iprint 100mil - 100 um
+EOF
+expect <<EOF
+2.44mm
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: multiply um with um"  <<EOF
+%iprint 100um * 50um
+EOF
+expect <<EOF
+5000um^2
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: multiply um with mm"  <<EOF
+%iprint 100um * 2mm
+EOF
+expect <<EOF
+0.2mm^2
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: divide mil by um"  <<EOF
+%iprint 20mil / 10um
+EOF
+expect <<EOF
+50.8
+EOF
+
+#------------------------------------------------------------------------------
+
+fped_dump "um: use um in vector" <<EOF
+vec @(100um, 50um)
+EOF
+expect <<EOF
+/* MACHINE-GENERATED ! */
+
+package "_"
+unit mm
+
+__0: vec @(100um, 50um)
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "um: measure distance in um" <<EOF
+a: vec @(0mm, 0mm)
+b: vec .(300um, 0mm)
+c: vec .(0mm, 400um)
+meas a >> c /* dummy */
+m: meas a >> c
+
+%meas m
+EOF
+expect <<EOF
+0.5
+EOF