int __random_r (buf, result) struct random_data *buf; int32_t *result; { int32_t *state; if (buf == NULL || result == NULL) goto fail; state = buf->state; if (buf->rand_type == TYPE_0) { int32_t val = state[0]; val = ((state[0] * 1103515245) + 12345) & 0x7fffffff; state[0] = val; *result = val; } else { int32_t *fptr = buf->fptr; int32_t *rptr = buf->rptr; int32_t *end_ptr = buf->end_ptr; int32_t val; val = *fptr += *rptr; /* Chucking least random bit. */ *result = (val >> 1) & 0x7fffffff; ++fptr; if (fptr >= end_ptr) { fptr = state; ++rptr; } else { ++rptr; if (rptr >= end_ptr) rptr = state; } buf->fptr = fptr; buf->rptr = rptr; } return 0; fail: __set_errno (EINVAL); return -1; }

### My name: 
    ### My student identity: 
    ### My description of the code:
    ### My explanation of the code:
    ### My explanation that:
    ### My option for this code: