| 1 | "use strict";
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| 2 |
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| 3 | var pow2 = [];
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| 4 | for(var i = 0; i < 32; i++)
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| 5 | pow2[i] = Math.pow(2, i);
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| 6 |
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| 7 |
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| 8 | function unsigned(buffer, offset, length) {
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| 9 | var result = 0;
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| 10 | var blen = buffer.length * 8;
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| 11 |
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| 12 | offset = offset || 0;
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| 13 |
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| 14 | if(offset < 0)
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| 15 | offset = blen + offset;
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| 16 |
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| 17 | if(length === undefined)
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| 18 | length = blen - offset;
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| 19 |
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| 20 | if(!length)
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| 21 | return 0;
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| 22 |
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| 23 | for(var i = 0, j = offset + length - 1; i < length; i++, j--)
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| 24 | result += buffer[j >> 3] & pow2[7 - j % 8] ? pow2[i] : 0;
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| 25 |
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| 26 | return result;
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| 27 | }
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| 28 |
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| 29 | module.exports = unsigned;
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