From 44217caa0d41884cc9a21b447fbfa43cceb1d2eb Mon Sep 17 00:00:00 2001
From: Mark Puha <p.mark95@gmail.com>
Date: Sat, 8 Feb 2025 13:37:52 +0100
Subject: [PATCH] successfully call lua function from Go

---
 adapter/Makefile |  2 ++
 adapter/lua.go   | 45 +++++++++++++++++++++++++++++++++++++++++++++
 go.mod           |  1 +
 go.sum           |  2 ++
 4 files changed, 50 insertions(+)
 create mode 100644 adapter/Makefile
 create mode 100644 adapter/lua.go

diff --git a/adapter/Makefile b/adapter/Makefile
new file mode 100644
index 0000000..41bc7aa
--- /dev/null
+++ b/adapter/Makefile
@@ -0,0 +1,2 @@
+all:
+	go run -tags lua54 lua.go
diff --git a/adapter/lua.go b/adapter/lua.go
new file mode 100644
index 0000000..8c56d4a
--- /dev/null
+++ b/adapter/lua.go
@@ -0,0 +1,45 @@
+package main
+
+import (
+	"encoding/base64"
+	"fmt"
+
+	"github.com/aarzilli/golua/lua"
+)
+
+func main() {
+	// luaB64 := `bG9jYWwgZnVuY3Rpb24gZF9nZW4oZGF0YSwgY291bnRlcikKCUhlYWRlciA9IHN0cmluZy5jaGFyKDB4MTIsIDB4MzQsIDB4NTYsIDB4NzgpCgktLSBsb2NhbCB0cyA9IG9zLnRpbWUoKQoJcmV0dXJuIEhlYWRlciAuLiBkYXRhCmVuZAoKbG9jYWwgZnVuY3Rpb24gZF9wYXJzZShkYXRhKQoJcmV0dXJuIHN0cmluZy5zdWIoZGF0YSwgI0hlYWRlcikKZW5kCg==`
+	// only d_gen
+	// luaB64 := `ZnVuY3Rpb24gRF9nZW4oZGF0YSkKCS0tIEhlYWRlciA9IHN0cmluZy5jaGFyKDB4MTIsIDB4MzQsIDB4NTYsIDB4NzgpCglsb2NhbCBIZWFkZXIgPSAiXHgxMlx4MzRceDU2XHg3OCIKCS0tIGxvY2FsIHRzID0gb3MudGltZSgpCglyZXR1cm4gSGVhZGVyIC4uIGRhdGEKZW5kCg==`
+	luaB64 := `ZnVuY3Rpb24gRF9nZW4oZGF0YSkKCS0tIEhlYWRlciA9IHN0cmluZy5jaGFyKDB4MTIsIDB4MzQsIDB4NTYsIDB4NzgpCglsb2NhbCBIZWFkZXIgPSAiXHgxMlx4MzRceDU2XHg3OCIKCWxvY2FsIHRzID0gb3MudGltZSgpCglyZXR1cm4gSGVhZGVyIC4uIGRhdGEKZW5kCg==`
+	sDec, _ := base64.StdEncoding.DecodeString(luaB64)
+	fmt.Println(string(sDec))
+	luaCode := sDec
+	L := lua.NewState()
+	L.OpenLibs()
+	defer L.Close()
+
+	// Load and execute the Lua code
+	if err := L.DoString(string(luaCode)); err != nil {
+		fmt.Printf("Error loading Lua code: %v\n", err)
+		return
+	}
+
+	// Push the function onto the stack
+	L.GetGlobal("D_gen")
+
+	// Push the argument
+	L.PushString("data")
+
+	if err := L.Call(1, 1); err != nil {
+		fmt.Printf("Error calling Lua function: %v\n", err)
+		return
+	}
+
+	result := L.ToString(-1)
+	L.Pop(1)
+
+	// Print the result
+	// fmt.Printf("Result: %x\n", []byte(result))
+	fmt.Printf("Result: %s\n", result)
+}
diff --git a/go.mod b/go.mod
index b03acb0..8511642 100644
--- a/go.mod
+++ b/go.mod
@@ -12,6 +12,7 @@ require (
 )
 
 require (
+	github.com/aarzilli/golua v0.0.0-20241229084300-cd31ab23902e // indirect
 	github.com/google/btree v1.0.1 // indirect
 	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
 )
diff --git a/go.sum b/go.sum
index 7b53725..119ba05 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/aarzilli/golua v0.0.0-20241229084300-cd31ab23902e h1:ibMKBskN7uMCz9TJgfaIVYVdPyckXm0UjFDRSNV7XB0=
+github.com/aarzilli/golua v0.0.0-20241229084300-cd31ab23902e/go.mod h1:hMjfaJVSqVnxenMlsxrq3Ni+vrm9Hs64tU4M7dhUoO4=
 github.com/google/btree v1.0.1 h1:gK4Kx5IaGY9CD5sPJ36FHiBJ6ZXl0kilRiiCj+jdYp4=
 github.com/google/btree v1.0.1/go.mod h1:xXMiIv4Fb/0kKde4SpL7qlzvu5cMJDRkFDxJfI9uaxA=
 github.com/tevino/abool/v2 v2.1.0 h1:7w+Vf9f/5gmKT4m4qkayb33/92M+Um45F2BkHOR+L/c=