JsVar *jswrap_typedarray_constructor(JsVarDataArrayBufferViewType type, JsVar *arr, JsVarInt byteOffset, JsVarInt length) {
JsVar *arrayBuffer = 0;
// Only allow use of byteOffset/length if we're passing an ArrayBuffer - NOT A VIEW.
bool copyData = false;
if (jsvIsArrayBuffer(arr) && arr->varData.arraybuffer.type==ARRAYBUFFERVIEW_ARRAYBUFFER) {
arrayBuffer = jsvLockAgain(arr);
} else if (jsvIsNumeric(arr)) {
length = jsvGetInteger(arr);
byteOffset = 0;
arrayBuffer = jswrap_arraybuffer_constructor((int)JSV_ARRAYBUFFER_GET_SIZE(type)*length);
} else if (jsvIsArray(arr) || jsvIsArrayBuffer(arr)) {
length = (JsVarInt)jsvGetLength(arr);
byteOffset = 0;
arrayBuffer = jswrap_arraybuffer_constructor((int)JSV_ARRAYBUFFER_GET_SIZE(type)*length);
copyData = true; // so later on we'll populate this
}
if (!arrayBuffer) {
jsExceptionHere(JSET_ERROR, "Unsupported first argument of type %t\n", arr);
return 0;
}
if (length==0) {
length = ((JsVarInt)jsvGetArrayBufferLength(arrayBuffer)-byteOffset) / (JsVarInt)JSV_ARRAYBUFFER_GET_SIZE(type);
if (length<0) length=0;
}
JsVar *typedArr = jsvNewWithFlags(JSV_ARRAYBUFFER);
if (typedArr) {
typedArr->varData.arraybuffer.type = type;
typedArr->varData.arraybuffer.byteOffset = (unsigned short)byteOffset;
typedArr->varData.arraybuffer.length = (unsigned short)length;
jsvSetFirstChild(typedArr, jsvGetRef(jsvRef(arrayBuffer)));
if (copyData) {
// if we were given an array, populate this ArrayBuffer
JsvIterator it;
jsvIteratorNew(&it, arr, JSIF_DEFINED_ARRAY_ElEMENTS);
while (jsvIteratorHasElement(&it)) {
JsVar *idx = jsvIteratorGetKey(&it);
if (jsvIsInt(idx)) {
JsVar *val = jsvIteratorGetValue(&it);
// TODO: This is horrible! We need to try and iterate properly...
jsvArrayBufferSet(typedArr, (size_t)jsvGetInteger(idx), val);
jsvUnLock(val);
}
jsvUnLock(idx);
jsvIteratorNext(&it);
}
jsvIteratorFree(&it);
}
}
jsvUnLock(arrayBuffer);
return typedArr;
}
JsVar *jswrap_typedarray_constructor(JsVarDataArrayBufferViewType type, JsVar *arr, JsVarInt byteOffset, JsVarInt length) {
JsVar *arrayBuffer = 0;
if (jsvIsArrayBuffer(arr)) {
arrayBuffer = jsvLockAgain(arr);
} else if (jsvIsInt(arr)) {
length = jsvGetInteger(arr);
byteOffset = 0;
arrayBuffer = jswrap_arraybuffer_constructor(JSV_ARRAYBUFFER_GET_SIZE(type)*length);
} else if (jsvIsArray(arr)) {
length = jsvGetArrayLength(arr);
byteOffset = 0;
arrayBuffer = jswrap_arraybuffer_constructor(JSV_ARRAYBUFFER_GET_SIZE(type)*length);
// later on we'll populate this
}
if (!arrayBuffer) {
jsError("Unsupported first argument\n");
return 0;
}
if (length<=0) length = (JsVarInt)jsvGetArrayBufferLength(arrayBuffer) / JSV_ARRAYBUFFER_GET_SIZE(type);
JsVar *typedArr = jsvNewWithFlags(JSV_ARRAYBUFFER);
if (typedArr) {
typedArr->varData.arraybuffer.type = type;
typedArr->varData.arraybuffer.byteOffset = (unsigned short)byteOffset;
typedArr->varData.arraybuffer.length = (unsigned short)length;
typedArr->firstChild = jsvGetRef(jsvRef(arrayBuffer));
if (jsvIsArray(arr)) {
// if we were given an array, populate this ArrayBuffer
JsvArrayIterator it;
jsvArrayIteratorNew(&it, arr);
while (jsvArrayIteratorHasElement(&it)) {
JsVar *idx = jsvArrayIteratorGetIndex(&it);
if (jsvIsInt(idx)) {
JsVar *val = jsvArrayIteratorGetElement(&it);
jsvArrayBufferSet(typedArr, jsvGetInteger(idx), val);
jsvUnLock(val);
}
jsvUnLock(idx);
jsvArrayIteratorNext(&it);
}
jsvArrayIteratorFree(&it);
}
}
jsvUnLock(arrayBuffer);
return typedArr;
}
