moved string value to util and added sprtinf, adjusted prints to use tostring to prevent concatentation errors on some types

scada-common/util.lua

@@ -8,25 +8,59 @@ local util = {}
 -- PRINT --
 
 -- print
+---@param message any
 util.print = function (message)
-    term.write(message)
+    term.write(tostring(message))
 end
 
 -- print line
+---@param message any
 util.println = function (message)
-    print(message)
+    print(tostring(message))
 end
 
 -- timestamped print
+---@param message any
 util.print_ts = function (message)
-    if message == nil then return end
-    term.write(os.date("[%H:%M:%S] ") .. message)
+    term.write(os.date("[%H:%M:%S] ") .. tostring(message))
 end
 
 -- timestamped print line
+---@param message any
 util.println_ts = function (message)
-    if message == nil then return end
-    print(os.date("[%H:%M:%S] ") .. message)
+    print(os.date("[%H:%M:%S] ") .. tostring(message))
+end
+
+-- STRING TOOLS --
+
+-- get a value as a string
+---@param val any
+---@return string
+util.strval = function (val)
+    local t = type(val)
+    if t == "table" or t == "function" then
+        return "[" .. tostring(val) .. "]"
+    else
+        return tostring(val)
+    end
+end
+
+-- concatenation with built-in to string
+---@vararg any
+---@return string
+util.concat = function (...)
+    local str = ""
+    for _, v in ipairs(arg) do
+        str = str .. util.strval(v)
+    end
+    return str
+end
+
+-- sprintf implementation
+---@param format string
+---@vararg any
+util.sprintf = function (format, ...)
+    return string.format(format, table.unpack(arg))
 end
 
 -- TIME --

test/testutils.lua

@@ -5,27 +5,6 @@ local println = util.println
 
 local testutils = {}
 
--- get a value as a string
----@param val any
----@return string value value as string or "%VALSTR_UNKNOWN%"
-local function valstr(val)
-    local t = type(val)
-
-    if t == "nil" then
-        return "nil"
-    elseif t == "number" then
-        return "" .. val
-    elseif t == "boolean" then
-        if val then return "true" else return "false" end
-    elseif t == "string" then
-        return val
-    elseif t == "table" or t == "function" then
-        return val
-    else
-        return "%VALSTR_UNKNOWN%"
-    end
-end
-
 -- test a function
 ---@param name string function name
 ---@param f function function
@@ -46,7 +25,7 @@ function testutils.test_func(name, f, values, results)
     for i = 1, #values do
         local check = values[i]
         local expect = results[i]
-        print(name .. "(" .. valstr(check) .. ") => ")
+        print(name .. "(" .. util.strval(check) .. ") => ")
         assert(f(check) == expect, "FAIL")
         println("PASS")
     end
@@ -57,7 +36,7 @@ end
 ---@param f function function
 ---@param result any expected result
 function testutils.test_func_nil(name, f, result)
-    print(name .. "(" .. valstr(nil) .. ") => ")
+    print(name .. "(nil) => ")
     assert(f(nil) == result, "FAIL")
     println("PASS")
 end