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nodejscn
node-api-cn
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*
{
integer
}
`Buffer`
底层的
`ArrayBuffer`
对象的
`byteOffset`
。
当
`Buffer.from(ArrayBuffer, byteOffset, length)`
设置了
`byteOffset`
或创建一个小于
`Buffer.poolSize`
的
`Buffer`
时,底层的
`ArrayBuffer`
的偏移量并不是从
0
开始。
当直接使用
`buf.buffer`
访问底层的
`ArrayBuffer`
时可能会导致问题,因为
`ArrayBuffer`
的其他部分可能并不指向
`Buffer`
对象。
当创建与
`Buffer`
共享其内存的
`TypedArray`
对象时,需要正确地指定
`byteOffset`
。
``
`js
// 创建一个小于 `
Buffer
.
poolSize
` 的 buffer。
const nodeBuffer = new Buffer.from([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
// 当将 Node.js Buffer 转换为 Int8Array 时,
// 应使用 byteOffset 仅引用 `
nodeBuffer
.
buffer
` 中包含 `
nodeBuffer
` 内存的部分。
new Int8Array(nodeBuffer.buffer, nodeBuffer.byteOffset, nodeBuffer.length);
`
``
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