pull-stream throughs for manipulating (splitting, etc) buffers
This is a suite of pull-stream
throughs that are used to manipulate an incoming buffer into component
parts. In a very simple case it could be used to split a file on
newline characters (
\n). In a more complicated case it could be used
to identify separate chunks in a bzip2
Separate a single input buffer into frames. The incoming stream will be collected until we have identified that a matching header or footer (or both) have been successfully identified.
The behaviour of this particular through stream depends on the requested behaviour:
for a header-only search, once another matching header is identified the through stream will pass that frame on. In the case of the header only search, the EOF file considered to match a new header also.
for a footer-only search, once the footer is identified all queued data is passed on as a frame.
when both a matching header and footer are required, once we have a match at both ends that is passed on as a frame.
Split an incoming buffer into separate parts, and throw away the delimiters. The following is a pretty contrived example, but demonstrates the idea:
var bits = ;var pull = ;var input = 1 2 3 4 5 6;console;// --> <Buffer 31 0a 32 0a 33 0a 34 0a 35 0a 36>;// --> <Buffer 31>// --> <Buffer 32>// --> <Buffer 33>// --> <Buffer 34>// --> <Buffer 35>// --> <Buffer 36>
Copyright (c) 2014 Damon Oehlman firstname.lastname@example.org
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.