83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
|
// Copyright 2020 Hans Dembinski
|
||
|
|
//
|
||
|
|
// 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)
|
||
|
|
|
||
|
|
#ifndef BOOST_HISTOGRAM_DETAIL_REDUCE_COMMAND_HPP
|
||
|
|
#define BOOST_HISTOGRAM_DETAIL_REDUCE_COMMAND_HPP
|
||
|
|
|
||
|
|
#include <boost/histogram/detail/span.hpp>
|
||
|
|
#include <boost/histogram/fwd.hpp>
|
||
|
|
#include <boost/throw_exception.hpp>
|
||
|
|
#include <cassert>
|
||
|
|
#include <stdexcept>
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
namespace histogram {
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
struct reduce_command {
|
||
|
|
static constexpr unsigned unset = static_cast<unsigned>(-1);
|
||
|
|
unsigned iaxis = unset;
|
||
|
|
enum class range_t : char {
|
||
|
|
none,
|
||
|
|
indices,
|
||
|
|
values,
|
||
|
|
} range = range_t::none;
|
||
|
|
union {
|
||
|
|
axis::index_type index;
|
||
|
|
double value;
|
||
|
|
} begin{0}, end{0};
|
||
|
|
unsigned merge = 0; // default value indicates unset option
|
||
|
|
bool crop = false;
|
||
|
|
// for internal use by the reduce algorithm
|
||
|
|
bool is_ordered = true;
|
||
|
|
bool use_underflow_bin = true;
|
||
|
|
bool use_overflow_bin = true;
|
||
|
|
};
|
||
|
|
|
||
|
|
// - puts commands in correct axis order
|
||
|
|
// - sets iaxis for positional commands
|
||
|
|
// - detects and fails on invalid settings
|
||
|
|
// - fuses merge commands with non-merge commands
|
||
|
|
inline void normalize_reduce_commands(span<reduce_command> out,
|
||
|
|
span<const reduce_command> in) {
|
||
|
|
unsigned iaxis = 0;
|
||
|
|
for (const auto& o_in : in) {
|
||
|
|
assert(o_in.merge > 0);
|
||
|
|
if (o_in.iaxis != reduce_command::unset && o_in.iaxis >= out.size())
|
||
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument("invalid axis index"));
|
||
|
|
auto& o_out = out.begin()[o_in.iaxis == reduce_command::unset ? iaxis : o_in.iaxis];
|
||
|
|
if (o_out.merge == 0) {
|
||
|
|
o_out = o_in;
|
||
|
|
} else {
|
||
|
|
// Some command was already set for this axis, try to fuse commands.
|
||
|
|
if (!((o_in.range == reduce_command::range_t::none) ^
|
||
|
|
(o_out.range == reduce_command::range_t::none)) ||
|
||
|
|
(o_out.merge > 1 && o_in.merge > 1))
|
||
|
|
BOOST_THROW_EXCEPTION(std::invalid_argument(
|
||
|
|
"multiple conflicting reduce commands for axis " +
|
||
|
|
std::to_string(o_in.iaxis == reduce_command::unset ? iaxis : o_in.iaxis)));
|
||
|
|
if (o_in.range != reduce_command::range_t::none) {
|
||
|
|
o_out.range = o_in.range;
|
||
|
|
o_out.begin = o_in.begin;
|
||
|
|
o_out.end = o_in.end;
|
||
|
|
} else {
|
||
|
|
o_out.merge = o_in.merge;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
++iaxis;
|
||
|
|
}
|
||
|
|
|
||
|
|
iaxis = 0;
|
||
|
|
for (auto& o : out) o.iaxis = iaxis++;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace detail
|
||
|
|
} // namespace histogram
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif
|