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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2023 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/buffers | ||
| 8 | // | ||
| 9 | |||
| 10 | #include <boost/buffers/mutable_buffer_pair.hpp> | ||
| 11 | |||
| 12 | namespace boost { | ||
| 13 | namespace buffers { | ||
| 14 | |||
| 15 | mutable_buffer_pair | ||
| 16 | 544 | mutable_buffer_pair:: | |
| 17 | prefix_impl( | ||
| 18 | std::size_t n) const noexcept | ||
| 19 | { | ||
| 20 | 544 | auto const it0 = begin(); | |
| 21 |
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544 | if(n <= it0->size()) |
| 22 | return { { | ||
| 23 | it0->data(), n }, | ||
| 24 | 272 | mutable_buffer{} }; | |
| 25 | 272 | n -= it0->size(); | |
| 26 | 272 | auto it1 = it0; | |
| 27 | 272 | ++it1; | |
| 28 |
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272 | if(n < it1->size()) |
| 29 | return { *it0, { | ||
| 30 | 210 | it1->data(), n } }; | |
| 31 | 62 | return *this; | |
| 32 | } | ||
| 33 | |||
| 34 | mutable_buffer_pair | ||
| 35 | 544 | mutable_buffer_pair:: | |
| 36 | suffix_impl( | ||
| 37 | std::size_t n) const noexcept | ||
| 38 | { | ||
| 39 | 544 | auto it0 = end(); | |
| 40 | 544 | --it0; | |
| 41 |
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544 | if(n <= it0->size()) |
| 42 | 272 | return { *it0 + ( | |
| 43 | 272 | it0->size() - n), | |
| 44 | 272 | mutable_buffer{} }; | |
| 45 | 272 | n -= it0->size(); | |
| 46 | 272 | auto it1 = it0; | |
| 47 | 272 | --it1; | |
| 48 |
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272 | if(n < it1->size()) |
| 49 | 210 | return { *it1 + ( | |
| 50 | 210 | it1->size() - n), *it0 }; | |
| 51 | 62 | return *this; | |
| 52 | } | ||
| 53 | |||
| 54 | } // buffers | ||
| 55 | } // boost | ||
| 56 |