add go support (#59)

go/go.mod

@@ -0,0 +1,3 @@
+module ruapu-go
+
+go 1.20

go/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"fmt"
+	"ruapu-go/ruapu"
+	"strconv"
+)
+
+func main() {
+	ruapu.Init()
+	avx2Status := ruapu.Supports("avx2")
+	fmt.Println("avx2:" + strconv.Itoa(avx2Status))
+	rua := ruapu.Rua()
+	fmt.Println(rua)
+}

go/ruapu/ruapu-binding.go

@@ -0,0 +1,36 @@
+package ruapu
+
+/*
+#cgo CFLAGS: -I ../../
+#define RUAPU_IMPLEMENTATION
+#include "ruapu.h"
+#include "stdlib.h"
+*/
+import "C"
+import (
+	"unsafe"
+)
+
+func Init() {
+	C.ruapu_init()
+}
+
+func Supports(isa string) int {
+	ptr := C.CString(isa)
+	defer C.free(unsafe.Pointer(ptr))
+	result := int(C.ruapu_supports(ptr))
+	return result
+}
+
+func Rua() []string {
+	p := unsafe.Pointer(C.ruapu_rua())
+	s := make([]string, 0, 1)
+	for i := 0; ; i++ {
+		q := *(*unsafe.Pointer)(unsafe.Pointer(uintptr(p) + uintptr(i)*unsafe.Sizeof(p)))
+		if q == nil {
+			break
+		}
+		s = append(s, C.GoString((*C.char)(q)))
+	}
+	return s
+}