Implement TypedArray.prototype.at (#18)
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2 changed files with 57 additions and 1 deletions
56
quickjs.c
56
quickjs.c
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@ -51864,6 +51864,61 @@ fail:
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return JS_EXCEPTION;
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}
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static JSValue js_typed_array_at(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv)
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{
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JSObject *p;
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int64_t idx, len;
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p = get_typed_array(ctx, this_val, /*is_dataview*/0);
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if (!p)
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return JS_EXCEPTION;
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if (typed_array_is_detached(ctx, p)) {
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JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
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return JS_EXCEPTION;
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}
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if (JS_ToInt64Sat(ctx, &idx, argv[0]))
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return JS_EXCEPTION;
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len = p->u.array.count;
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if (idx < 0)
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idx = len + idx;
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if (idx < 0 || idx >= len)
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return JS_UNDEFINED;
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switch (p->class_id) {
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case JS_CLASS_INT8_ARRAY:
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return JS_NewInt32(ctx, p->u.array.u.int8_ptr[idx]);
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case JS_CLASS_UINT8C_ARRAY:
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case JS_CLASS_UINT8_ARRAY:
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return JS_NewInt32(ctx, p->u.array.u.uint8_ptr[idx]);
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case JS_CLASS_INT16_ARRAY:
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return JS_NewInt32(ctx, p->u.array.u.int16_ptr[idx]);
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case JS_CLASS_UINT16_ARRAY:
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return JS_NewInt32(ctx, p->u.array.u.uint16_ptr[idx]);
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case JS_CLASS_INT32_ARRAY:
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return JS_NewInt32(ctx, p->u.array.u.int32_ptr[idx]);
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case JS_CLASS_UINT32_ARRAY:
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return JS_NewUint32(ctx, p->u.array.u.uint32_ptr[idx]);
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case JS_CLASS_FLOAT32_ARRAY:
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return __JS_NewFloat64(ctx, p->u.array.u.float_ptr[idx]);
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case JS_CLASS_FLOAT64_ARRAY:
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return __JS_NewFloat64(ctx, p->u.array.u.double_ptr[idx]);
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#ifdef CONFIG_BIGNUM
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case JS_CLASS_BIG_INT64_ARRAY:
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return JS_NewBigInt64(ctx, p->u.array.u.int64_ptr[idx]);
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case JS_CLASS_BIG_UINT64_ARRAY:
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return JS_NewBigUint64(ctx, p->u.array.u.uint64_ptr[idx]);
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#endif
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}
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abort(); /* unreachable */
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return JS_UNDEFINED;
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}
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static JSValue js_typed_array_set(JSContext *ctx,
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JSValueConst this_val,
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int argc, JSValueConst *argv)
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@ -53054,6 +53109,7 @@ static const JSCFunctionListEntry js_typed_array_base_funcs[] = {
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static const JSCFunctionListEntry js_typed_array_base_proto_funcs[] = {
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JS_CGETSET_DEF("length", js_typed_array_get_length, NULL ),
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JS_CFUNC_DEF("at", 1, js_typed_array_at ),
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JS_CGETSET_MAGIC_DEF("buffer", js_typed_array_get_buffer, NULL, 0 ),
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JS_CGETSET_MAGIC_DEF("byteLength", js_typed_array_get_byteLength, NULL, 0 ),
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JS_CGETSET_MAGIC_DEF("byteOffset", js_typed_array_get_byteOffset, NULL, 0 ),
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@ -197,7 +197,7 @@ template
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Temporal=skip
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top-level-await
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TypedArray
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TypedArray.prototype.at=skip
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TypedArray.prototype.at
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u180e
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Uint16Array
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Uint32Array
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