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123 lines
2.7 KiB
123 lines
2.7 KiB
5 years ago
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buffers
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=======
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Treat a collection of Buffers as a single contiguous partially mutable Buffer.
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Where possible, operations execute without creating a new Buffer and copying
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everything over.
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This is a cleaner more Buffery rehash of
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[bufferlist](http://github.com/substack/node-bufferlist).
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example
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=======
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slice
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-----
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var Buffers = require('buffers');
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var bufs = Buffers();
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bufs.push(new Buffer([1,2,3]));
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bufs.push(new Buffer([4,5,6,7]));
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bufs.push(new Buffer([8,9,10]));
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console.dir(bufs.slice(2,8))
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output:
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$ node examples/slice.js
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<Buffer 03 04 05 06 07 08>
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splice
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------
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var Buffers = require('buffers');
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var bufs = Buffers([
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new Buffer([1,2,3]),
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new Buffer([4,5,6,7]),
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new Buffer([8,9,10]),
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]);
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var removed = bufs.splice(2, 4);
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console.dir({
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removed : removed.slice(),
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bufs : bufs.slice(),
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});
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output:
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$ node examples/splice.js
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{ removed: <Buffer 03 04 05 06>,
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bufs: <Buffer 01 02 07 08 09 0a> }
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methods
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=======
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Buffers(buffers)
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----------------
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Create a Buffers with an array of `Buffer`s if specified, else `[]`.
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.push(buf1, buf2...)
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--------------------
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Push buffers onto the end. Just like `Array.prototype.push`.
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.unshift(buf1, buf2...)
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-----------------------
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Unshift buffers onto the head. Just like `Array.prototype.unshift`.
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.slice(i, j)
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------------
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Slice a range out of the buffer collection as if it were contiguous.
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Works just like the `Array.prototype.slice` version.
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.splice(i, howMany, replacements)
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---------------------------------
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Splice the buffer collection as if it were contiguous.
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Works just like `Array.prototype.splice`, even the replacement part!
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.copy(dst, dstStart, start, end)
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--------------------------------
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Copy the buffer collection as if it were contiguous to the `dst` Buffer with the
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specified bounds.
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Works just like `Buffer.prototype.copy`.
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.get(i)
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-------
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Get a single element at index `i`.
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.set(i, x)
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----------
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Set a single element's value at index `i`.
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.indexOf(needle, offset)
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----------
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Find a string or buffer `needle` inside the buffer collection. Returns
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the position of the search string or -1 if the search string was not
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found.
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Provide an `offset` to skip that number of characters at the beginning
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of the search. This can be used to find additional matches.
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This function will return the correct result even if the search string
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is spread out over multiple internal buffers.
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.toBuffer()
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-----------
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Convert the buffer collection to a single buffer, equivalent with `.slice(0, buffers.length)`;
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.toString(encoding, start, end)
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-----------
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Decodes and returns a string from the buffer collection.
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Works just like `Buffer.prototype.toString`
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