| [/ |
| / Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| / |
| / Distributed under the Boost Software License, Version 1.0. (See accompanying |
| / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| /] |
| |
| [section:SyncReadStream Buffer-oriented synchronous read stream requirements] |
| |
| A type `X` meets the `SyncReadStream` requirements if it satisfies the |
| requirements listed below. |
| |
| In the table below, `a` denotes a value of type `X`, `mb` denotes a (possibly |
| const) value satisfying the [link asio.reference.MutableBufferSequence |
| `MutableBufferSequence`] requirements, and `ec` denotes an object of type |
| `error_code`. |
| |
| [table SyncReadStream requirements |
| [[operation] [type] [semantics, pre/post-conditions]] |
| [ |
| [`a.read_some(mb)`[br] |
| `a.read_some(mb,ec)`] |
| [`size_t`] |
| [ |
| Meets the requirements for a [link asio.reference.read_write_operations |
| read operation].[br] |
| [br] |
| If `buffer_size(mb) > 0`, reads one or more bytes of data from the stream |
| `a` into the buffer sequence `mb`. If successful, sets `ec` such that |
| `!ec` is `true`, and returns the number of bytes read. If an error |
| occurred, sets `ec` such that `!!ec` is `true`, and returns 0. If all |
| data has been read from the stream, and the stream performed an orderly |
| shutdown, sets `ec` to `stream_errc::eof` and returns 0.[br] |
| [br] |
| If `buffer_size(mb) == 0`, the operation shall not block. Sets `ec` such |
| that `!ec` is `true`, and returns 0. |
| ] |
| ] |
| ] |
| |
| [endsect] |