pqc/crypto_kem/sntrup653/clean/crypto_decode_653x3.c

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#include "crypto_decode_653x3.h"
#define uint8 uint8_t
#define p 653
void PQCLEAN_SNTRUP653_CLEAN_crypto_decode_653x3(void *v, const unsigned char *s) {
uint8 *f = v;
uint8 x;
int i;
for (i = 0; i < p / 4; ++i) {
x = *s++;
*f++ = ((uint8)(x & 3)) - 1;
x >>= 2;
*f++ = ((uint8)(x & 3)) - 1;
x >>= 2;
*f++ = ((uint8)(x & 3)) - 1;
x >>= 2;
*f++ = ((uint8)(x & 3)) - 1;
}
x = *s++;
*f++ = ((uint8)(x & 3)) - 1;
}