static void send_snm_req(n2n_sn_t *sss,
n2n_sock_t *sn,
int req_communities,
snm_comm_name_t *communities,
int communities_num)
{
uint8_t pktbuf[N2N_PKT_BUF_SIZE];
size_t idx;
n2n_sock_str_t sockbuf;
snm_hdr_t hdr = { SNM_TYPE_REQ_LIST_MSG, 0, ++sss->seq_num };
n2n_SNM_REQ_t req = { 0, NULL };
if (sn_is_loopback(sn, sss->sn_port))
return;
SET_S(hdr.flags);
if (req_communities)
{
SET_C(hdr.flags);
}
else if (communities)
{
SET_N(hdr.flags);
req.comm_num = communities_num & 0xFFFF;
req.comm_ptr = communities;
}
idx = 0;
encode_SNM_REQ(pktbuf, &idx, &hdr, &req);
traceEvent(TRACE_INFO, "send SNM_REQ to %s", sock_to_cstr(sockbuf, sn));
sendto_sock(sss->sn_sock, sn, pktbuf, idx);
}
/* We should cache the coefficients with the ctm.... */
int
gx_matrix_to_fixed_coeff(const gs_matrix * pmat, register fixed_coeff * pfc,
int max_bits)
{
gs_matrix ctm;
int scale = -10000;
int expt, shift;
ctm = *pmat;
pfc->skewed = 0;
if (!is_fzero(ctm.xx)) {
discard(frexp(ctm.xx, &scale));
}
if (!is_fzero(ctm.xy)) {
discard(frexp(ctm.xy, &expt));
if (expt > scale)
scale = expt;
pfc->skewed = 1;
}
if (!is_fzero(ctm.yx)) {
discard(frexp(ctm.yx, &expt));
if (expt > scale)
scale = expt;
pfc->skewed = 1;
}
if (!is_fzero(ctm.yy)) {
discard(frexp(ctm.yy, &expt));
if (expt > scale)
scale = expt;
}
/*
* There are two multiplications in fixed_coeff_mult: one involves a
* factor that may have max_bits significant bits, the other may have
* fixed_fraction_bits (_fixed_shift) bits. Ensure that neither one
* will overflow.
*/
if (max_bits < fixed_fraction_bits)
max_bits = fixed_fraction_bits;
scale = sizeof(long) * 8 - 1 - max_bits - scale;
shift = scale - _fixed_shift;
if (shift > 0) {
pfc->shift = shift;
pfc->round = (fixed) 1 << (shift - 1);
} else {
pfc->shift = 0;
pfc->round = 0;
scale -= shift;
}
#define SET_C(c)\
if ( is_fzero(ctm.c) ) pfc->c = 0;\
else pfc->c = (long)ldexp(ctm.c, scale)
SET_C(xx);
SET_C(xy);
SET_C(yx);
SET_C(yy);
#undef SET_C
#ifdef DEBUG
if (gs_debug_c('x')) {
dlprintf6("[x]ctm: [%6g %6g %6g %6g %6g %6g]\n",
ctm.xx, ctm.xy, ctm.yx, ctm.yy, ctm.tx, ctm.ty);
dlprintf6(" scale=%d fc: [0x%lx 0x%lx 0x%lx 0x%lx] shift=%d\n",
scale, pfc->xx, pfc->xy, pfc->yx, pfc->yy,
pfc->shift);
}
#endif
pfc->max_bits = max_bits;
return 0;
}
