feat: add read_at_least and write_at_least algorithms (#260)#347
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mvandeberg merged 1 commit intoJul 1, 2026
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Add read_at_least and write_at_least as straightforward extensions of
read/write. Where read/write transfer exactly buffer_size(buffers) bytes,
the _at_least variants stop as soon as a minimum of n bytes have been
transferred, keeping any bytes a single read_some/write_some delivers
beyond n without looping again. This serves the buffered-source case
where n bytes are required but the remaining buffer capacity is optional.
If n exceeds buffer_size(buffers) the request is impossible to satisfy and
the operation fails immediately with {std::errc::invalid_argument, 0}.
A contingency that coincides with reaching n is suppressed: a satisfied
request is a success, mirroring read/write.
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An automated preview of the documentation is available at https://347.capy.prtest3.cppalliance.org/index.html If more commits are pushed to the pull request, the docs will rebuild at the same URL. 2026-07-01 18:23:06 UTC |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## develop-2 #347 +/- ##
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Coverage 98.29% 98.29%
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Files 77 79 +2
Lines 3984 3986 +2
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+ Hits 3916 3918 +2
Misses 68 68
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Add read_at_least and write_at_least as straightforward extensions of read/write. Where read/write transfer exactly buffer_size(buffers) bytes, the _at_least variants stop as soon as a minimum of n bytes have been transferred, keeping any bytes a single read_some/write_some delivers beyond n without looping again. This serves the buffered-source case where n bytes are required but the remaining buffer capacity is optional.
If n exceeds buffer_size(buffers) the request is impossible to satisfy and the operation fails immediately with {std::errc::invalid_argument, 0}. A contingency that coincides with reaching n is suppressed: a satisfied request is a success, mirroring read/write.