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Moves Uint32ArrayView and hasCanvasTypedArrays into compatibility.js.

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This commit is contained in:
Yury Delendik 2017-04-13 13:16:35 -05:00
parent 74b31ab18f
commit 30bee9fe0c
7 changed files with 83 additions and 110 deletions
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28
src/core/murmurhash3.js
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@ -29,8 +29,6 @@
}
}(this, function (exports, sharedUtil) {
var Uint32ArrayView = sharedUtil.Uint32ArrayView;
var MurmurHash3_64 = (function MurmurHash3_64Closure(seed) {
// Workaround for missing math precision in JS.
var MASK_HIGH = 0xffff0000;
@ -42,21 +40,8 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure(seed) {
this.h2 = seed ? seed & 0xffffffff : SEED;
}
var alwaysUseUint32ArrayView = false;
if (typeof PDFJSDev === 'undefined' ||
!PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
// old webkits have issues with non-aligned arrays
try {
// eslint-disable-next-line no-new
new Uint32Array(new Uint8Array(5).buffer, 0, 1);
} catch (e) {
alwaysUseUint32ArrayView = true;
}
}
MurmurHash3_64.prototype = {
update: function MurmurHash3_64_update(input) {
var useUint32ArrayView = alwaysUseUint32ArrayView;
var i;
if (typeof input === 'string') {
var data = new Uint8Array(input.length * 2);
@ -70,14 +55,9 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure(seed) {
data[length++] = code & 0xff;
}
}
} else if (input instanceof Uint8Array) {
} else if (typeof input === 'object' && ('byteLength' in input)) {
data = input;
length = data.length;
} else if (typeof input === 'object' && ('length' in input)) {
// processing regular arrays as well, e.g. for IE9
data = input;
length = data.length;
useUint32ArrayView = true;
length = data.byteLength;
} else {
throw new Error('Wrong data format in MurmurHash3_64_update. ' +
'Input must be a string or array.');
@ -86,9 +66,7 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure(seed) {
var blockCounts = length >> 2;
var tailLength = length - blockCounts * 4;
// we don't care about endianness here
var dataUint32 = useUint32ArrayView ?
new Uint32ArrayView(data, blockCounts) :
new Uint32Array(data.buffer, 0, blockCounts);
var dataUint32 = new Uint32Array(data.buffer, 0, blockCounts);
var k1 = 0;
var k2 = 0;
var h1 = this.h1;