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/*
* Copyright (c) 2002-2015 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
* Copyright (c) 2012-2015 Viktor Juhasz <viktor.juhasz@balabit.com>
* Copyright (c) 2012-2013 Viktor Tusa
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#ifndef NVTABLE_SERIALIZE_ENDIANUTILS_H_
#define NVTABLE_SERIALIZE_ENDIANUTILS_H_
static inline guint8 reverse(guint8 b)
{
b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
return b;
}
static inline void
nv_table_swap_entry_flags(NVEntry *entry)
{
entry->flags = reverse(entry->flags);
}
static inline void
nv_entry_swap_bytes(NVEntry *entry)
{
nv_table_swap_entry_flags(entry);
entry->alloc_len = GUINT32_SWAP_LE_BE(entry->alloc_len);
if (!entry->indirect)
{
entry->vdirect.value_len = GUINT32_SWAP_LE_BE(entry->vdirect.value_len);
}
else
{
entry->vindirect.handle = GUINT32_SWAP_LE_BE(entry->vindirect.handle);
entry->vindirect.ofs = GUINT32_SWAP_LE_BE(entry->vindirect.ofs);
entry->vindirect.len = GUINT32_SWAP_LE_BE(entry->vindirect.len);
}
}
static inline void
nv_table_dyn_value_swap_bytes(NVIndexEntry *self)
{
self->handle = GUINT32_SWAP_LE_BE(self->handle);
self->ofs = GUINT32_SWAP_LE_BE(self->handle);
};
static inline void
nv_table_data_swap_bytes(NVTable *self)
{
NVIndexEntry *index_table;
NVEntry *entry;
gint i;
for (i = 0; i < self->num_static_entries; i++)
{
entry = nv_table_get_entry_at_ofs(self, self->static_entries[i]);
if (!entry)
continue;
nv_entry_swap_bytes(entry);
}
index_table = nv_table_get_index(self);
for (i = 0; i < self->index_size; i++)
{
entry = nv_table_get_entry_at_ofs(self, index_table[i].ofs);
if (!entry)
continue;
nv_entry_swap_bytes(entry);
}
}
static inline void
nv_table_struct_swap_bytes(NVTable *self)
{
guint16 i;
NVIndexEntry *index_table;
self->size = GUINT16_SWAP_LE_BE(self->size);
self->used = GUINT16_SWAP_LE_BE(self->used);
self->index_size = GUINT16_SWAP_LE_BE(self->index_size);
for (i = 0; i < self->num_static_entries; i++)
{
self->static_entries[i] = GUINT16_SWAP_LE_BE(self->static_entries[i]);
}
index_table = nv_table_get_index(self);
for (i = 0; i < self->index_size; i++)
{
nv_table_dyn_value_swap_bytes(&index_table[i]);
}
}
#endif /* NVTABLE_SERIALIZE_ENDIANUTILS_H_ */
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