fix: do not depend on internal ops (#64)

* chore: modernize module

* fmt

---------

Co-authored-by: Dj <[email protected]>

deps.ts

@@ -1,3 +1,4 @@
+export { decodeBase64, encodeBase64 } from "jsr:@std/[email protected]/base64";
 export { dlopen } from "jsr:@denosaurs/[email protected]";
 export {
   createDownloadURL,

src/ffi.ts

@@ -970,30 +970,22 @@ lib.sk_init();
 
 export default lib;
 
-const {
-  op_ffi_cstr_read,
-  op_ffi_get_buf,
-  op_base64_encode,
-  op_base64_decode,
-}: {
-  op_ffi_cstr_read: (ptr: Deno.PointerValue) => string;
-  op_ffi_get_buf: (
-    ptr: Deno.PointerValue,
-    offset: number,
-    size: number,
-  ) => ArrayBuffer;
-  op_base64_encode: (buf: Uint8Array) => string;
-  op_base64_decode: (base64: string) => Uint8Array;
-  // deno-lint-ignore no-explicit-any
-} = (Deno as any)[(Deno as any).internal].core.ops;
-
 export function cstr(str: string) {
   return new TextEncoder().encode(str + "\0");
 }
 
-export {
-  op_base64_decode as decodeBase64,
-  op_base64_encode as encodeBase64,
-  op_ffi_cstr_read as readCstr,
-  op_ffi_get_buf as getBuffer,
-};
+export function readCstr(ptr: Deno.PointerValue): string {
+  return new Deno.UnsafePointerView(ptr!).getCString();
+}
+
+export function getBuffer(
+  ptr: Deno.PointerValue,
+  offset: number,
+  size: number,
+): Uint8Array {
+  return new Uint8Array(
+    new Deno.UnsafePointerView(ptr!).getArrayBuffer(size, offset),
+  );
+}
+
+export { decodeBase64, encodeBase64 } from "../deps.ts";