29 lines
864 B
JavaScript
29 lines
864 B
JavaScript
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/* js-crc32 (C) 2014-present SheetJS -- http://sheetjs.com */
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/*:: declare var CRC32: CRC32Module; */
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/*:: declare var self: DedicatedWorkerGlobalScope; */
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importScripts('/crc32.js');
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/*::self.*/postMessage({t:"ready"});
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var recrc = function(f, crc, l) {
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/*::self.*/postMessage({t:"iter", f:f, crc:crc, l:l, sz:f.size});
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if(l >= f.size) return /*::self.*/postMessage({t:"done"});
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var sz = 0x100000; if(l + sz > f.size) sz = f.size - l;
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var d = f.slice(l, l + sz);
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var r = new FileReader();
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r.onload = function(e) {
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var b = new Uint8Array(e.target.result);
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var newcrc = CRC32.buf(b, crc);
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/*::self.*/postMessage({t:"data", crc:newcrc, bytes:l+sz});
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recrc(f, newcrc, l + sz);
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};
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r.readAsArrayBuffer(d);
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};
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onmessage = function (oEvent) {
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/*::self.*/postMessage({t:"start"});
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var f/*:File*/ = oEvent.data;
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var seed = 0;
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recrc(f, seed, 0);
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};
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