mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
|
/* Copyright (C) 2017 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 COMMON_BYTE_VECTOR_H
|
||
|
|
#define COMMON_BYTE_VECTOR_H
|
||
|
|
|
||
|
|
#include "common/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.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.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>;
|
||
|
|
|
||
|
|
} /* namespace gdb */
|
||
|
|
|
||
|
|
#endif /* COMMON_DEF_VECTOR_H */
|