src/third_party/mozjs/js/src/jsapi-tests/testTypedArrays.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */


#include "tests.h"
#include "jsfriendapi.h"

using namespace js;

BEGIN_TEST(testTypedArrays)
{
    bool ok = true;

    ok = ok &&
        TestPlainTypedArray<JS_NewInt8Array, int8_t, JS_GetInt8ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewUint8Array, uint8_t, JS_GetUint8ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewUint8ClampedArray, uint8_t, JS_GetUint8ClampedArrayData>(cx) &&
        TestPlainTypedArray<JS_NewInt16Array, int16_t, JS_GetInt16ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewUint16Array, uint16_t, JS_GetUint16ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewInt32Array, int32_t, JS_GetInt32ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewUint32Array, uint32_t, JS_GetUint32ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewFloat32Array, float, JS_GetFloat32ArrayData>(cx) &&
        TestPlainTypedArray<JS_NewFloat64Array, double, JS_GetFloat64ArrayData>(cx);

    size_t nbytes = sizeof(double) * 8;
    RootedObject buffer(cx, JS_NewArrayBuffer(cx, nbytes));
    CHECK(JS_IsArrayBufferObject(buffer));

    RootedObject proto(cx);
    JS_GetPrototype(cx, buffer, proto.address());
    CHECK(!JS_IsArrayBufferObject(proto));
    RootedObject dummy(cx, JS_GetParent(proto));
    CHECK(!JS_IsArrayBufferObject(dummy));

    CHECK_EQUAL(JS_GetArrayBufferByteLength(buffer), nbytes);
    memset(JS_GetArrayBufferData(buffer), 1, nbytes);

    ok = ok &&
        TestArrayFromBuffer<JS_NewInt8ArrayWithBuffer, JS_NewInt8ArrayFromArray, int8_t, JS_GetInt8ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewUint8ArrayWithBuffer, JS_NewUint8ArrayFromArray, uint8_t, JS_GetUint8ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewUint8ClampedArrayWithBuffer, JS_NewUint8ClampedArrayFromArray, uint8_t, JS_GetUint8ClampedArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewInt16ArrayWithBuffer, JS_NewInt16ArrayFromArray, int16_t, JS_GetInt16ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewUint16ArrayWithBuffer, JS_NewUint16ArrayFromArray, uint16_t, JS_GetUint16ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewInt32ArrayWithBuffer, JS_NewInt32ArrayFromArray, int32_t, JS_GetInt32ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewUint32ArrayWithBuffer, JS_NewUint32ArrayFromArray, uint32_t, JS_GetUint32ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewFloat32ArrayWithBuffer, JS_NewFloat32ArrayFromArray, float, JS_GetFloat32ArrayData>(cx) &&
        TestArrayFromBuffer<JS_NewFloat64ArrayWithBuffer, JS_NewFloat64ArrayFromArray, double, JS_GetFloat64ArrayData>(cx);

    return ok;
}

template<JSObject *Create(JSContext *, uint32_t),
         typename Element,
         Element *GetData(JSObject *)>
bool
TestPlainTypedArray(JSContext *cx)
{
    {
        RootedObject notArray(cx, Create(cx, UINT32_MAX));
        CHECK(!notArray);
    }

    RootedObject array(cx, Create(cx, 7));
    CHECK(JS_IsTypedArrayObject(array));
    RootedObject proto(cx);
    JS_GetPrototype(cx, array, proto.address());
    CHECK(!JS_IsTypedArrayObject(proto));
    RootedObject dummy(cx, JS_GetParent(proto));
    CHECK(!JS_IsTypedArrayObject(dummy));

    CHECK_EQUAL(JS_GetTypedArrayLength(array), 7);
    CHECK_EQUAL(JS_GetTypedArrayByteOffset(array), 0);
    CHECK_EQUAL(JS_GetTypedArrayByteLength(array), sizeof(Element) * 7);

    Element *data;
    CHECK(data = GetData(array));
    *data = 13;
    RootedValue v(cx);
    CHECK(JS_GetElement(cx, array, 0, v.address()));
    CHECK_SAME(v, INT_TO_JSVAL(13));

    return true;
}

template<JSObject *CreateWithBuffer(JSContext *, JSObject *, uint32_t, int32_t),
         JSObject *CreateFromArray(JSContext *, JSObject *),
         typename Element,
         Element *GetData(JSObject *)>
bool
TestArrayFromBuffer(JSContext *cx)
{
    size_t elts = 8;
    size_t nbytes = elts * sizeof(Element);
    RootedObject buffer(cx, JS_NewArrayBuffer(cx, nbytes));
    uint8_t *bufdata;
    CHECK(bufdata = JS_GetArrayBufferData(buffer));
    memset(bufdata, 1, nbytes);

    {
        RootedObject notArray(cx, CreateWithBuffer(cx, buffer, UINT32_MAX, -1));
        CHECK(!notArray);
    }

    RootedObject array(cx, CreateWithBuffer(cx, buffer, 0, -1));
    CHECK_EQUAL(JS_GetTypedArrayLength(array), elts);
    CHECK_EQUAL(JS_GetTypedArrayByteOffset(array), 0);
    CHECK_EQUAL(JS_GetTypedArrayByteLength(array), nbytes);
    CHECK_EQUAL(JS_GetArrayBufferViewBuffer(array), (JSObject*) buffer);

    Element *data;
    CHECK(data = GetData(array));
    CHECK(bufdata = JS_GetArrayBufferData(buffer));
    CHECK_EQUAL((void*) data, (void*) bufdata);

    CHECK_EQUAL(*bufdata, 1);
    CHECK_EQUAL(*reinterpret_cast<uint8_t*>(data), 1);

    RootedObject shortArray(cx, CreateWithBuffer(cx, buffer, 0, elts / 2));
    CHECK_EQUAL(JS_GetTypedArrayLength(shortArray), elts / 2);
    CHECK_EQUAL(JS_GetTypedArrayByteOffset(shortArray), 0);
    CHECK_EQUAL(JS_GetTypedArrayByteLength(shortArray), nbytes / 2);

    RootedObject ofsArray(cx, CreateWithBuffer(cx, buffer, nbytes / 2, -1));
    CHECK_EQUAL(JS_GetTypedArrayLength(ofsArray), elts / 2);
    CHECK_EQUAL(JS_GetTypedArrayByteOffset(ofsArray), nbytes / 2);
    CHECK_EQUAL(JS_GetTypedArrayByteLength(ofsArray), nbytes / 2);

    // Make sure all 3 views reflect the same buffer at the expected locations
    JS::RootedValue v(cx, INT_TO_JSVAL(39));
    JS_SetElement(cx, array, 0, v.address());
    JS::RootedValue v2(cx);
    CHECK(JS_GetElement(cx, array, 0, v2.address()));
    CHECK_SAME(v, v2);
    CHECK(JS_GetElement(cx, shortArray, 0, v2.address()));
    CHECK_SAME(v, v2);
    CHECK_EQUAL(long(JSVAL_TO_INT(v)), long(reinterpret_cast<Element*>(data)[0]));

    v = INT_TO_JSVAL(40);
    JS_SetElement(cx, array, elts / 2, v.address());
    CHECK(JS_GetElement(cx, array, elts / 2, v2.address()));
    CHECK_SAME(v, v2);
    CHECK(JS_GetElement(cx, ofsArray, 0, v2.address()));
    CHECK_SAME(v, v2);
    CHECK_EQUAL(long(JSVAL_TO_INT(v)), long(reinterpret_cast<Element*>(data)[elts / 2]));

    v = INT_TO_JSVAL(41);
    JS_SetElement(cx, array, elts - 1, v.address());
    CHECK(JS_GetElement(cx, array, elts - 1, v2.address()));
    CHECK_SAME(v, v2);
    CHECK(JS_GetElement(cx, ofsArray, elts / 2 - 1, v2.address()));
    CHECK_SAME(v, v2);
    CHECK_EQUAL(long(JSVAL_TO_INT(v)), long(reinterpret_cast<Element*>(data)[elts - 1]));

    JS::RootedObject copy(cx, CreateFromArray(cx, array));
    CHECK(JS_GetElement(cx, array, 0, v.address()));
    CHECK(JS_GetElement(cx, copy, 0, v2.address()));
    CHECK_SAME(v, v2);

    /* The copy should not see changes in the original */
    v2 = INT_TO_JSVAL(42);
    JS_SetElement(cx, array, 0, v2.address());
    CHECK(JS_GetElement(cx, copy, 0, v2.address()));
    CHECK_SAME(v2, v); /* v is still the original value from 'array' */

    return true;
}

END_TEST(testTypedArrays)