69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
package main
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import (
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"os"
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/lua"
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)
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func reader(L *lua.State, data c.Pointer, size *c.Ulong) *c.Char {
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file := (*os.File)(data)
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fileInfo, err := file.Stat()
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if err != nil {
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return nil
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}
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fileSize := fileInfo.Size()
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buffer := make([]byte, fileSize)
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bytesRead, err := file.Read(buffer)
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if err != nil {
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return nil
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}
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*size = c.Ulong(bytesRead)
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if bytesRead > 0 {
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return (*c.Char)(unsafe.Pointer(unsafe.SliceData(buffer)))
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}
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return nil
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}
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func main() {
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L := lua.Newstate()
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defer L.Close()
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L.Openlibs()
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file, err := os.Open("../llgofunc.luac")
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if err != nil {
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c.Printf(c.Str("Failed to open file for reading\n"))
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return
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}
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defer file.Close()
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if L.Load(reader, c.Pointer(file), c.Str("greet"), nil) != lua.OK {
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c.Printf(c.Str("Failed to dump Lua function\n"))
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}
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c.Printf(c.Str("Stack size before call: %d\n"), L.Gettop())
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c.Printf(c.Str("Top element type after call: %s\n"), L.Typename(L.Type(-1)))
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L.Pushstring(c.Str("World"))
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if L.Pcall(1, 1, 0) != lua.OK {
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c.Printf(c.Str("Failed to call function: %s\n"))
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}
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if L.Isstring(-1) != 0 {
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c.Printf(c.Str("Result: %s\n"), L.Tostring(-1))
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}
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}
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/* Expected output:
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Stack size before call: 1
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Top element type after call: function
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Result: Hello, World!
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*/
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