utils: add helper to create a Uint8Array while copying the data

src/utils.c

@@ -1,6 +1,5 @@
-
 /*
- * QuickJS libuv bindings
+ * txiki.js
  *
  * Copyright (c) 2019-present Saúl Ibarra Corretgé <[email protected]>
  *
@@ -271,6 +270,17 @@ JSValue TJS_NewUint8Array(JSContext *ctx, uint8_t *data, size_t size) {
     return buf;
 }
 
+JSValue TJS_NewUint8ArrayCopy(JSContext *ctx, uint8_t *data, size_t size) {
+    JSValue abuf = JS_NewArrayBufferCopy(ctx, data, size);
+    if (JS_IsException(abuf))
+        return abuf;
+    TJSRuntime *qrt = TJS_GetRuntime(ctx);
+    CHECK_NOT_NULL(qrt);
+    JSValue buf = JS_CallConstructor(ctx, qrt->builtins.u8array_ctor, 1, &abuf);
+    JS_FreeValue(ctx, abuf);
+    return buf;
+}
+
 JSValue TJS_NewDate(JSContext *ctx, double epoch_ms) {
     TJSRuntime *qrt = TJS_GetRuntime(ctx);
     CHECK_NOT_NULL(qrt);

src/utils.h

@@ -1,5 +1,5 @@
 /*
- * QuickJS libuv bindings
+ * txiki.js
  *
  * Copyright (c) 2019-present Saúl Ibarra Corretgé <[email protected]>
  *
@@ -122,6 +122,7 @@ JSValue TJS_NewResolvedPromise(JSContext *ctx, int argc, JSValueConst *argv);
 JSValue TJS_NewRejectedPromise(JSContext *ctx, int argc, JSValueConst *argv);
 
 JSValue TJS_NewUint8Array(JSContext *ctx, uint8_t *data, size_t size);
+JSValue TJS_NewUint8ArrayCopy(JSContext *ctx, uint8_t *data, size_t size);
 JSValue TJS_NewDate(JSContext *ctx, double epoch_ms);
 
 extern const char *tjs_signal_map[];