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/* See LICENSE file for copyright and license details. */
#include "common.h"
#if defined(__clang__)
# pragma clang diagnostic ignored "-Wcast-align"
#endif
/**
* Unmarshal a `struct libkeccak_state` from a buffer
*
* @param state The slot for the unmarshalled state, must not be
* initialised (memory leak otherwise), can be `NULL`
* @param data_ The input buffer
* @return The number of bytes read from `data`, 0 on error
*/
size_t
libkeccak_state_unmarshal(struct libkeccak_state *restrict state, const void *restrict data_)
{
#define get(type, var) state->var = *((const type *)data), data += sizeof(type)
const unsigned char *restrict data = data_;
if (!state) {
data += (7 * sizeof(long int) + 26 * sizeof(int64_t));
return sizeof(struct libkeccak_state) - sizeof(char *) + *(const size_t *)data * sizeof(char);
}
get(long int, r);
get(long int, c);
get(long int, n);
get(long int, b);
get(long int, w);
get(int64_t, wmod);
get(long int, l);
get(long int, nr);
memcpy(state->S, data, sizeof(state->S));
data += sizeof(state->S);
get(size_t, mptr);
get(size_t, mlen);
state->M = malloc(state->mptr * sizeof(char));
if (!state->M)
return 0;
memcpy(state->M, data, state->mptr * sizeof(char));
data += state->mptr;
return sizeof(struct libkeccak_state) - sizeof(char *) + state->mptr * sizeof(char);
#undef get
}
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