| 1 | 'use strict';
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| 2 | Object.defineProperty(exports, '__esModule', { value: true });
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| 3 |
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| 4 | function verifuint(value, max) {
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| 5 | if (typeof value !== 'number')
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| 6 | throw new Error('cannot write a non-number as a number');
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| 7 | if (value < 0)
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| 8 | throw new Error('specified a negative value for writing an unsigned value');
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| 9 | if (value > max) throw new Error('RangeError: value out of range');
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| 10 | if (Math.floor(value) !== value)
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| 11 | throw new Error('value has a fractional component');
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| 12 | }
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| 13 | function readUInt64LE(buffer, offset) {
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| 14 | const a = buffer.readUInt32LE(offset);
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| 15 | let b = buffer.readUInt32LE(offset + 4);
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| 16 | b *= 0x100000000;
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| 17 | verifuint(b + a, 0x001fffffffffffff);
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| 18 | return b + a;
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| 19 | }
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| 20 | exports.readUInt64LE = readUInt64LE;
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| 21 | function writeUInt64LE(buffer, value, offset) {
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| 22 | verifuint(value, 0x001fffffffffffff);
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| 23 | buffer.writeInt32LE(value & -1, offset);
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| 24 | buffer.writeUInt32LE(Math.floor(value / 0x100000000), offset + 4);
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| 25 | return offset + 8;
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| 26 | }
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| 27 | exports.writeUInt64LE = writeUInt64LE;
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| 28 | function reverseBuffer(buffer) {
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| 29 | if (buffer.length < 1) return buffer;
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| 30 | let j = buffer.length - 1;
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| 31 | let tmp = 0;
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| 32 | for (let i = 0; i < buffer.length / 2; i++) {
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| 33 | tmp = buffer[i];
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| 34 | buffer[i] = buffer[j];
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| 35 | buffer[j] = tmp;
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| 36 | j--;
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| 37 | }
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| 38 | return buffer;
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| 39 | }
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| 40 | exports.reverseBuffer = reverseBuffer;
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