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/* Wrap std::vector<char *> that owns the 'char *' strings.
Copyright (C) 2025 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_GDB_ARGV_VEC_H
#define GDBSUPPORT_GDB_ARGV_VEC_H
#include "gdbsupport/common-utils.h"
#include <vector>
namespace gdb
{
/* A class that wraps around a vector of 'char *' strings. The class owns
the strings within the vector and will release them by calling xfree()
on each string when this classes destructor is called. */
class argv_vec final
{
/* Vector of strings. This class owns the strings within the vector.
This is at the start of the class so we can use decltype(). */
std::vector<char *> m_args;
public:
using value_type = decltype (m_args)::value_type;
using iterator = decltype (m_args)::iterator;
using const_iterator = decltype (m_args)::const_iterator;
using reference = decltype (m_args)::reference;
using const_reference = decltype (m_args)::const_reference;
argv_vec ()
{
/* Nothing. */
}
/* Move the owned strings from OTHER. */
argv_vec (argv_vec &&other)
{
this->m_args = std::move (other.m_args);
}
/* Don't currently support copying the strings from OTHER. */
argv_vec (const argv_vec &other) = delete;
/* Move elements from OTHER. Free currently owned strings. */
argv_vec &operator= (argv_vec &&other)
{
free_vector_argv (m_args);
this->m_args = std::move (other.m_args);
return *this;
}
/* Don't currently support copying the strings from OTHER. */
argv_vec &operator= (const argv_vec &other) = delete;
/* Release the owned strings. */
~argv_vec ()
{
free_vector_argv (m_args);
}
/* Append VALUE to the end of m_args. This class takes ownership of
VALUE, and will release VALUE by calling xfree() on it when this
object is destroyed. */
void push_back (const value_type &value)
{
m_args.push_back (value);
}
/* Append VALUE to the end of m_args. This class takes ownership of
VALUE, and will release VALUE by calling xfree() on it when this
object is destroyed. */
void push_back (value_type &&value)
{
m_args.push_back (value);
}
/* Non constant iterator to start of m_args. */
iterator begin ()
{
return m_args.begin ();
}
/* Non constant iterator to end of m_args. */
iterator end ()
{
return m_args.end ();
}
/* Constant iterator to start of m_args. */
const_iterator begin () const
{
return m_args.begin ();
}
/* Constant iterator to end of m_args. */
const_iterator end () const
{
return m_args.end ();
}
/* Return contiguous block of 'char *' pointers. Ideally this would be
const, but the execve interface to which this data is passed doesn't
accept 'const char **'. */
char **argv ()
{
return m_args.data ();
}
/* Return a constant reference to the underlying vector. */
const decltype (m_args) &get () const
{
return m_args;
}
/* Return true when m_args is empty. */
bool empty () const
{
return m_args.empty ();
}
};
} /* namespac gdb */
#endif /* GDBSUPPORT_GDB_ARGV_VEC_H */
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