move network functionality to new file

sim/utility.lua

@@ -1,4 +1,6 @@
 
+bool_to_int = {[false] = 0, [true] = 1}
+
 local escapes = {
 	{"\\", "b"},
 	{"\t", "t"},
@@ -85,3 +87,64 @@ function array_add(array, value)
 	end
 	table.insert(array, value)
 end
+
+function round(x)
+	return math.floor(x+0.5)
+end
+
+local units = {
+	"uHz",
+	"mHz",
+	"Hz",
+	"kHz",
+	"MHz",
+	"GHz",
+}
+function unitize(v)
+	local unit = 1
+	v = v*1000000
+	
+	while v >= 1000 do
+		v = v/1000
+		unit = unit+1
+	end
+	
+	local s
+	if v >= 100 then
+		s = "" .. round(v/10)*10
+	elseif v >= 10 then
+		s = "" .. round(v)
+	elseif v >= 1 then
+		s = "" .. round(v*10)/10
+		if #s == 1 then s = s .. ".0" end
+	else
+		s = 0
+	end
+	
+	return s .. " " .. units[unit]
+end
+
+function vectotable(vec)
+	local tbl = {}
+	for comp in string.gmatch(vec, "([^%s]+)") do
+		tbl[#tbl+1] = tonumber(comp)
+	end
+	return tbl
+end
+
+function tabletostring(table)
+	local str = tostring(table[1])
+	for i = 2, #table do
+		str = str .. " " .. tostring(table[i])
+	end
+	return str
+end
+
+function toboolean(value)
+	local num = tonumber(value)
+	if num == 1 then
+		return true
+	else
+		return false
+	end
+end