Function chacha_split

system/lib/mimalloc/src/random.c:111–120

}

static void chacha_split(mi_random_ctx_t* ctx, uint64_t nonce, mi_random_ctx_t* ctx_new) {
  _mi_memzero(ctx_new, sizeof(*ctx_new));
  _mi_memcpy(ctx_new->input, ctx->input, sizeof(ctx_new->input));
  ctx_new->input[12] = 0;
  ctx_new->input[13] = 0;
  ctx_new->input[14] = (uint32_t)nonce;
  ctx_new->input[15] = (uint32_t)(nonce >> 32);
  mi_assert_internal(ctx->input[14] != ctx_new->input[14] || ctx->input[15] != ctx_new->input[15]); // do not reuse nonces!
  chacha_block(ctx_new);
}


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