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node_modules
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ebml-block
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Filename :
vint.js
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// https://github.com/themasch/node-ebml/blob/master/lib/ebml/tools.js module.exports = function (buffer, start, signed) { start = start || 0 for (var length = 1; length <= 8; length++) { if (buffer[start] >= Math.pow(2, 8 - length)) { break } } if (length > 8) { throw new Error('Unrepresentable length: ' + length + ' ' + buffer.toString('hex', start, start + length)) } if (start + length > buffer.length) { return null } var i var value = buffer[start] & (1 << (8 - length)) - 1 for (i = 1; i < length; i++) { if (i === 7) { if (value >= Math.pow(2, 53 - 8) && buffer[start + 7] > 0) { return { length: length, value: -1 } } } value *= Math.pow(2, 8) value += buffer[start + i] } if (signed) { value -= Math.pow(2, length * 7 - 1) - 1 } return { length: length, value: value } }