mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
213516ef31
This commit is the result of running the gdb/copyright.py script, which automated the update of the copyright year range for all source files managed by the GDB project to be updated to include year 2023.
122 lines
3.1 KiB
C++
122 lines
3.1 KiB
C++
/* A range adapter that wraps multiple ranges
|
|
Copyright (C) 2022-2023 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef GDBSUPPORT_RANGE_CHAIN_H
|
|
#define GDBSUPPORT_RANGE_CHAIN_H
|
|
|
|
/* A range adapter that presents a number of ranges as if it were a
|
|
single range. That is, iterating over a range_chain will iterate
|
|
over each sub-range in order. */
|
|
template<typename Range>
|
|
struct range_chain
|
|
{
|
|
/* The type of the iterator that is created by this range. */
|
|
class iterator
|
|
{
|
|
public:
|
|
|
|
iterator (const std::vector<Range> &ranges, size_t idx)
|
|
: m_index (idx),
|
|
m_ranges (ranges)
|
|
{
|
|
skip_empty ();
|
|
}
|
|
|
|
bool operator== (const iterator &other) const
|
|
{
|
|
if (m_index != other.m_index || &m_ranges != &other.m_ranges)
|
|
return false;
|
|
if (m_current.has_value () != other.m_current.has_value ())
|
|
return false;
|
|
if (m_current.has_value ())
|
|
return *m_current == *other.m_current;
|
|
return true;
|
|
}
|
|
|
|
bool operator!= (const iterator &other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
|
|
iterator &operator++ ()
|
|
{
|
|
++*m_current;
|
|
if (*m_current == m_ranges[m_index].end ())
|
|
{
|
|
++m_index;
|
|
skip_empty ();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
typename Range::iterator::value_type operator* () const
|
|
{
|
|
return **m_current;
|
|
}
|
|
|
|
private:
|
|
/* Skip empty sub-ranges. If this finds a valid sub-range,
|
|
m_current is updated to point to its start; otherwise,
|
|
m_current is reset. */
|
|
void skip_empty ()
|
|
{
|
|
for (; m_index < m_ranges.size (); ++m_index)
|
|
{
|
|
m_current = m_ranges[m_index].begin ();
|
|
if (*m_current != m_ranges[m_index].end ())
|
|
return;
|
|
}
|
|
m_current.reset ();
|
|
}
|
|
|
|
/* Index into the vector indicating where the current iterator
|
|
comes from. */
|
|
size_t m_index;
|
|
/* The current iterator into one of the vector ranges. If no
|
|
value then this (outer) iterator is at the end of the overall
|
|
range. */
|
|
gdb::optional<typename Range::iterator> m_current;
|
|
/* Vector of ranges. */
|
|
const std::vector<Range> &m_ranges;
|
|
};
|
|
|
|
/* Create a new range_chain. */
|
|
template<typename T>
|
|
range_chain (T &&ranges)
|
|
: m_ranges (std::forward<T> (ranges))
|
|
{
|
|
}
|
|
|
|
iterator begin () const
|
|
{
|
|
return iterator (m_ranges, 0);
|
|
}
|
|
|
|
iterator end () const
|
|
{
|
|
return iterator (m_ranges, m_ranges.size ());
|
|
}
|
|
|
|
private:
|
|
|
|
/* The sub-ranges. */
|
|
std::vector<Range> m_ranges;
|
|
};
|
|
|
|
#endif /* GDBSUPPORT_RANGE_CHAIN_H */
|