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/* Copyright (C) 2017-2021 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
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 <>. */
#include "gdbsupport/def-vector.h"
namespace gdb {
/* byte_vector is a gdb_byte std::vector with a custom allocator that
unlike std::vector<gdb_byte> does not zero-initialize new elements
by default when the vector is created/resized. This is what you
usually want when working with byte buffers, since if you're
creating or growing a buffer you'll most surely want to fill it in
with data, in which case zero-initialization would be a
pessimization. For example:
gdb::byte_vector buf (some_large_size);
fill_with_data ( (), buf.size ());
On the odd case you do need zero initialization, then you can still
call the overloads that specify an explicit value, like:
gdb::byte_vector buf (some_initial_size, 0);
buf.resize (a_bigger_size, 0);
(Or use std::vector<gdb_byte> instead.)
Note that unlike std::vector<gdb_byte>, function local
gdb::byte_vector objects constructed with an initial size like:
gdb::byte_vector buf (some_size);
fill_with_data ( (), buf.size ());
usually compile down to the exact same as:
std::unique_ptr<byte[]> buf (new gdb_byte[some_size]);
fill_with_data (buf.get (), some_size);
with the former having the advantage of being a bit more readable,
and providing the whole std::vector API, if you end up needing it.
using byte_vector = gdb::def_vector<gdb_byte>;
using char_vector = gdb::def_vector<char>;
} /* namespace gdb */
#endif /* COMMON_DEF_VECTOR_H */