include/boost/capy/buffers/buffer_copy.hpp

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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/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			This function copies bytes from the constant buffer sequence `src` into
24			the mutable buffer sequence `dest`, stopping when any limit is reached.
25
26			@par Constraints
27			@code
28			MutableBufferSequence<decltype(dest)> &&
29			ConstBufferSequence<decltype(src)>
30			@endcode
31
32			@return The number of bytes copied, equal to
33			`std::min(size(dest), size(src), at_most)`.
34
35			@param dest The destination buffer sequence.
36			@param src The source buffer sequence.
37			@param at_most The maximum bytes to copy. Default copies all available.
38			*/
39			constexpr struct buffer_copy_mrdocs_workaround_t
40			{
41			template<
42			MutableBufferSequence MB,
43			ConstBufferSequence CB>
44			std::size_t
45		15250x	operator()(
46			MB const& dest,
47			CB const& src,
48			std::size_t at_most = std::size_t(-1)) const noexcept
49			{
50		15250x	std::size_t total = 0;
51		15250x	std::size_t pos0 = 0;
52		15250x	std::size_t pos1 = 0;
53		15250x	auto const end0 = end(src);
54		15250x	auto const end1 = end(dest);
55		15250x	auto it0 = begin(src);
56		15250x	auto it1 = begin(dest);
57		15250x	while(
58	6/6 unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::mutable_buffer>(boost::capy::mutable_buffer const&, boost::capy::mutable_buffer const&, unsigned long) const: ✓ Branch 0 taken 278 times. ✓ Branch 1 taken 104 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const: ✓ Branch 0 taken 838 times. ✓ Branch 1 taken 596 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 879 times. ✓ Branch 1 taken 219 times.	46651x	total < at_most &&
59	25/30 unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::mutable_buffer>(boost::capy::mutable_buffer const&, boost::capy::mutable_buffer const&, unsigned long) const: ✓ Branch 0 taken 382 times. ✓ Branch 1 taken 166 times. ✓ Branch 2 taken 274 times. ✓ Branch 3 taken 4 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const: ✓ Branch 0 taken 1434 times. ✗ Branch 1 not taken. ✓ Branch 3 taken 838 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 838 times. ✓ Branch 6 taken 596 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 299 times. ✓ Branch 1 taken 45 times. ✓ Branch 3 taken 257 times. ✓ Branch 4 taken 42 times. ✓ Branch 5 taken 257 times. ✗ Branch 6 not taken. ✓ Branch 7 taken 257 times. ✓ Branch 8 taken 87 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 240 times. ✓ Branch 1 taken 120 times. ✓ Branch 3 taken 180 times. ✓ Branch 4 taken 60 times. ✓ Branch 5 taken 180 times. ✗ Branch 6 not taken. ✓ Branch 7 taken 180 times. ✓ Branch 8 taken 180 times. unsigned long boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 1098 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 633 times. ✓ Branch 3 taken 465 times.	67096x	it0 != end0 &&
60	2/2 ✓ Branch 1 taken 633 times. ✓ Branch 2 taken 246 times.	9398x	it1 != end1)
61			{
62		25457x	const_buffer b0 = *it0;
63		25457x	mutable_buffer b1 = *it1;
64		25457x	b0 += pos0;
65		25457x	b1 += pos1;
66			std::size_t const amount =
67		76371x	[&]
68			{
69		25457x	std::size_t n = b0.size();
70	47/66 <unknown function 45>: ✓ Branch 1 taken 6 times. ✓ Branch 1 taken 1 time. ✗ Branch 1 not taken. ✓ Branch 1 taken 4 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 4533 times. ✓ Branch 2 taken 125 times. ✓ Branch 2 taken 18 times. ✓ Branch 2 taken 16 times. ✓ Branch 2 taken 78 times. ✓ Branch 4 taken 62 times. ✓ Branch 4 taken 3145 times. ✓ Branch 4 taken 42 times. ✗ Branch 4 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 4518 times. ✓ Branch 5 taken 5201 times. ✓ Branch 5 taken 46 times. ✓ Branch 5 taken 16 times. ✓ Branch 5 taken 78 times. ✓ Branch 7 taken 1916 times. ✓ Branch 7 taken 4 times. ✗ Branch 7 not taken. ✗ Branch 7 not taken. ✓ Branch 8 taken 3130 times. ✓ Branch 8 taken 12 times. ✓ Branch 8 taken 121 times. ✓ Branch 8 taken 3 times. ✗ Branch 10 not taken. ✓ Branch 10 taken 4 times. ✗ Branch 10 not taken. ✓ Branch 11 taken 8 times. ✓ Branch 11 taken 4 times. ✓ Branch 11 taken 5 times. ✓ Branch 13 taken 50 times. ✗ Branch 13 not taken. ✓ Branch 14 taken 95 times. ✓ Branch 14 taken 3 times. ✗ Branch 16 not taken. ✓ Branch 17 taken 3 times. ✗ Branch 19 not taken. ✓ Branch 20 taken 3 times. ✗ Branch 22 not taken. ✓ Branch 23 taken 3 times. ✗ Branch 25 not taken. ✓ Branch 26 taken 3 times. ✗ Branch 28 not taken. ✓ Branch 29 taken 3 times. ✗ Branch 31 not taken. ✓ Branch 32 taken 2 times. ✗ Branch 34 not taken. ✓ Branch 35 taken 2 times. ✗ Branch 37 not taken. ✓ Branch 38 taken 11 times. ✗ Branch 40 not taken. ✓ Branch 41 taken 1 time. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 270 times. boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const::{lambda()#1}::operator()() const: ✗ Branch 1 not taken. ✓ Branch 2 taken 838 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 253 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 92 times. ✓ Branch 2 taken 88 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 414 times. ✓ Branch 2 taken 219 times.	25457x	if( n > b1.size())
71		5748x	n = b1.size();
72	22/38 <unknown function 45>: ✗ Branch 0 not taken. ✓ Branch 1 taken 4781 times. ✓ Branch 2 taken 3150 times. ✓ Branch 3 taken 9958 times. ✓ Branch 4 taken 1728 times. ✓ Branch 5 taken 3458 times. ✗ Branch 6 not taken. ✓ Branch 7 taken 21 times. ✓ Branch 8 taken 24 times. ✓ Branch 9 taken 124 times. ✗ Branch 10 not taken. ✓ Branch 11 taken 3 times. ✗ Branch 12 not taken. ✓ Branch 13 taken 3 times. ✗ Branch 14 not taken. ✓ Branch 15 taken 3 times. ✗ Branch 16 not taken. ✓ Branch 17 taken 3 times. ✗ Branch 18 not taken. ✓ Branch 19 taken 3 times. ✗ Branch 20 not taken. ✓ Branch 21 taken 2 times. ✗ Branch 22 not taken. ✓ Branch 23 taken 2 times. ✗ Branch 24 not taken. ✓ Branch 25 taken 11 times. ✗ Branch 26 not taken. ✓ Branch 27 taken 1 time. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✗ Branch 0 not taken. ✓ Branch 1 taken 274 times. boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const::{lambda()#1}::operator()() const: ✗ Branch 0 not taken. ✓ Branch 1 taken 838 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✗ Branch 0 not taken. ✓ Branch 1 taken 257 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✗ Branch 0 not taken. ✓ Branch 1 taken 180 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✗ Branch 0 not taken. ✓ Branch 1 taken 633 times.	25457x	if( n > at_most - total)
73		4902x	n = at_most - total;
74	22/38 <unknown function 45>: ✓ Branch 0 taken 4023 times. ✓ Branch 1 taken 758 times. ✓ Branch 2 taken 11858 times. ✓ Branch 3 taken 1250 times. ✓ Branch 4 taken 4836 times. ✓ Branch 5 taken 350 times. ✓ Branch 6 taken 21 times. ✗ Branch 7 not taken. ✓ Branch 8 taken 148 times. ✗ Branch 9 not taken. ✓ Branch 10 taken 3 times. ✗ Branch 11 not taken. ✓ Branch 12 taken 3 times. ✗ Branch 13 not taken. ✓ Branch 14 taken 3 times. ✗ Branch 15 not taken. ✓ Branch 16 taken 3 times. ✗ Branch 17 not taken. ✓ Branch 18 taken 3 times. ✗ Branch 19 not taken. ✓ Branch 20 taken 2 times. ✗ Branch 21 not taken. ✓ Branch 22 taken 2 times. ✗ Branch 23 not taken. ✓ Branch 24 taken 11 times. ✗ Branch 25 not taken. ✓ Branch 26 taken 1 time. ✗ Branch 27 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 274 times. ✗ Branch 1 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const::{lambda()#1}::operator()() const: ✓ Branch 0 taken 838 times. ✗ Branch 1 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 257 times. ✗ Branch 1 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 180 times. ✗ Branch 1 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 0 taken 633 times. ✗ Branch 1 not taken.	25457x	if(n != 0)
75		23099x	std::memcpy(
76			b1.data(),
77			b0.data(),
78			n);
79		25457x	return n;
80		25457x	}();
81		25457x	total += amount;
82	8/10 boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 174 times. ✓ Branch 2 taken 100 times. boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const::{lambda()#1}::operator()() const: ✗ Branch 1 not taken. ✓ Branch 2 taken 838 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 87 times. ✓ Branch 2 taken 170 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 180 times. ✗ Branch 2 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 444 times. ✓ Branch 2 taken 189 times.	25457x	if(amount == b1.size())
83			{
84		7294x	++it1;
85		7294x	pos1 = 0;
86			}
87			else
88			{
89		18163x	pos1 += amount;
90			}
91	9/10 boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 270 times. ✓ Branch 2 taken 4 times. boost::capy::buffer_copy_mrdocs_workaround_t::operator()<boost::capy::mutable_buffer, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > >(boost::capy::mutable_buffer const&, boost::capy::slice_of<std::vector<boost::capy::const_buffer, std::allocator<boost::capy::const_buffer> > > const&, unsigned long) const::{lambda()#1}::operator()() const: ✓ Branch 1 taken 838 times. ✗ Branch 2 not taken. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 253 times. ✓ Branch 2 taken 4 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 88 times. ✓ Branch 2 taken 92 times. boost::capy::buffer_copy_mrdocs_workaround_t::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: ✓ Branch 1 taken 219 times. ✓ Branch 2 taken 414 times.	25457x	if(amount == b0.size())
92			{
93		16223x	++it0;
94		16223x	pos0 = 0;
95			}
96			else
97			{
98		9234x	pos0 += amount;
99			}
100			}
101		15250x	return total;
102			}
103			} buffer_copy {};
104
105			} // capy
106			} // boost
107
108			#endif
109