59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
var UINT8_SIZE = 1;
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var BOOL_SIZE = UINT8_SIZE;
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var UINT_SIZE = 4;
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var FLOAT_SIZE = 4;
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var DATA_VIEW_INFO_OFFSET_INDEX = 0;
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var DATA_VIEW_INFO_SIZE_INDEX = 1;
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var DATA_VIEW_INFO_COUNT_INDEX = 2;
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// computes the end offset, exclusive
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function dataViewEnd(dataViewInfo) {
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return dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX] + dataViewInfo[DATA_VIEW_INFO_SIZE_INDEX] * dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX];
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}
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function dataViewUint8(dataView, dataViewInfo) {
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return dataView.getUint8(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX]);
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}
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function dataViewUint(dataView, dataViewInfo) {
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return dataView.getUint32(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true);
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}
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function dataViewBigUint(dataView, dataViewInfo) {
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return Number(dataView.getBigUint64(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true));
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}
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function dataViewUint32Array(dataView, dataViewInfo) {
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const uintArray = []
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let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
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for (let i = 0; i < dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX]; i++) {
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uintArray.push(dataView.getUint32(offset, true));
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offset += UINT_SIZE;
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}
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return uintArray;
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}
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function dataViewUint8Array(dataView, dataViewInfo) {
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const uintArray = []
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let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
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for (let i = 0; i < dataViewInfo[DATA_VIEW_INFO_SIZE_INDEX] * dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX]; i++) {
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uintArray.push(dataView.getUint8(offset));
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offset += UINT8_SIZE;
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}
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return uintArray;
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}
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function dataViewFloat(dataView, dataViewInfo) {
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return dataView.getFloat32(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true);
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}
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function dataViewFloatArray(dataView, dataViewInfo) {
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const floatArray = []
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let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
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for (let i = 0; i < dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX]; i++) {
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floatArray.push(dataView.getFloat32(offset, true));
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offset += FLOAT_SIZE;
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}
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return floatArray;
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} |