Index/include / boost / capy / buffers / buffer_copy.hpp

include/boost/capy/buffers/buffer_copy.hpp

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buffer_copy.hpp
f(x) Functions (15)
Function Calls Lines Blocks
<unknown function 47> :47 – – – unsigned long boost::capy::._anon_160::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const :47 29x 100.0% 100.0% unsigned long boost::capy::._anon_164::operator()<boost::capy::mutable_buffer, boost::capy::mutable_buffer>(boost::capy::mutable_buffer const&, boost::capy::mutable_buffer const&, unsigned long) const :47 116x 100.0% 100.0% unsigned long boost::capy::._anon_164::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer, 18446744073709551615ul> const&, unsigned long) const :47 180x 100.0% 96.0% unsigned long boost::capy::._anon_164::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const :47 368x 100.0% 100.0% unsigned long boost::capy::._anon_165::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const :47 68x 100.0% 100.0% unsigned long boost::capy::._anon_169::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer const, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer const, 18446744073709551615ul> const&, unsigned long) const :47 27x 100.0% 100.0% unsigned long boost::capy::._anon_182::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer const, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer const, 18446744073709551615ul> const&, unsigned long) const :47 60x 100.0% 100.0% boost::capy::._anon_160::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const::{lambda()#1}::operator()() const :69 63x 95.0% 92.0% boost::capy::._anon_164::operator()<boost::capy::mutable_buffer, boost::capy::mutable_buffer>(boost::capy::mutable_buffer const&, boost::capy::mutable_buffer const&, unsigned long) const::{lambda()#1}::operator()() const :69 116x 95.0% 92.0% boost::capy::._anon_164::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer, 18446744073709551615ul> const&, unsigned long) const::{lambda()#1}::operator()() const :69 180x 90.0% 92.0% boost::capy::._anon_164::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const::{lambda()#1}::operator()() const :69 368x 95.0% 92.0% boost::capy::._anon_165::operator()<std::span<boost::capy::mutable_buffer const, 18446744073709551615ul>, boost::capy::mutable_buffer>(std::span<boost::capy::mutable_buffer const, 18446744073709551615ul> const&, boost::capy::mutable_buffer const&, unsigned long) const::{lambda()#1}::operator()() const :69 202x 95.0% 92.0% boost::capy::._anon_169::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer const, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer const, 18446744073709551615ul> const&, unsigned long) const::{lambda()#1}::operator()() const :69 61x 95.0% 92.0% boost::capy::._anon_182::operator()<boost::capy::mutable_buffer, std::span<boost::capy::const_buffer const, 18446744073709551615ul> >(boost::capy::mutable_buffer const&, std::span<boost::capy::const_buffer const, 18446744073709551615ul> const&, unsigned long) const::{lambda()#1}::operator()() const :69 196x 95.0% 92.0%
Line TLA Hits Source Code
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/capy
8 //
9
10 #ifndef BOOST_CAPY_BUFFERS_BUFFER_COPY_HPP
11 #define BOOST_CAPY_BUFFERS_BUFFER_COPY_HPP
12
13 #include <boost/capy/detail/config.hpp>
14 #include <boost/capy/buffers.hpp>
15 #include <cstring>
16 #include <utility>
17
18 namespace boost {
19 namespace capy {
20
21 /** Copy the contents of a buffer sequence into another buffer sequence.
22
23 @functionobject
24 */
25 constexpr struct
26 {
27 /** Copy the contents of a buffer sequence into another buffer sequence.
28
29 Copies bytes from the constant buffer sequence `src` into the
30 mutable buffer sequence `dest`, stopping when any limit is
31 reached.
32
33 @param dest The destination buffer sequence.
34
35 @param src The source buffer sequence.
36
37 @param at_most The maximum bytes to copy. Default copies all
38 available.
39
40 @return The number of bytes copied, equal to
41 `std::min(size(dest), size(src), at_most)`.
42 */
43 template<
44 MutableBufferSequence MB,
45 ConstBufferSequence CB>
46 std::size_t
47 12256x operator()(
48 MB const& dest,
49 CB const& src,
50 std::size_t at_most = std::size_t(-1)) const noexcept
51 {
52 12256x std::size_t total = 0;
53 12256x std::size_t pos0 = 0;
54 12256x std::size_t pos1 = 0;
55 12256x auto const end0 = end(src);
56 12256x auto const end1 = end(dest);
57 12256x auto it0 = begin(src);
58 12256x auto it1 = begin(dest);
59 12256x while(
60 38002x total < at_most &&
61 54380x it0 != end0 &&
62 9402x it1 != end1)
63 {
64 19805x const_buffer b0 = *it0;
65 19805x mutable_buffer b1 = *it1;
66 19805x b0 += pos0;
67 19805x b1 += pos1;
68 std::size_t const amount =
69 59415x [&]
70 {
71 19805x std::size_t n = b0.size();
72 19805x if( n > b1.size())
73 5750x n = b1.size();
74 19805x if( n > at_most - total)
75 4902x n = at_most - total;
76 19805x if(n != 0)
77 18953x std::memcpy(
78 b1.data(),
79 b0.data(),
80 n);
81 19805x return n;
82 19805x }();
83 19805x total += amount;
84 19805x if(amount == b1.size())
85 {
86 7301x ++it1;
87 7301x pos1 = 0;
88 }
89 else
90 {
91 12504x pos1 += amount;
92 }
93 19805x if(amount == b0.size())
94 {
95 10569x ++it0;
96 10569x pos0 = 0;
97 }
98 else
99 {
100 9236x pos0 += amount;
101 }
102 }
103 12256x return total;
104 }
105 } buffer_copy {};
106
107 } // capy
108 } // boost
109
110 #endif
111