[util] added string <-> hex utils

1 files changed, 17 insertions, 0 deletions

diff --git a/src/utils.lua b/src/utils.lua
new file mode 100644
index 0000000..af6e91f
--- /dev/null
+++ b/src/utils.lua
@@ -0,0 +1,17 @@
+--
+-- ~~~ helper utils
+--
+
+-- string -> hex
+function string.tohex(str)
+    return (str:gsub(".", function (c)
+        return string.format("%02X", string.byte(c))
+    end))
+end
+
+-- hex -> string
+function string.fromhex(str)
+    return (str:gsub("..", function (cc)
+        return string.char(tonumber(cc, 16))
+    end))
+end