void Drone::Recive()
{
std::string str = this->net.getmsg();
std::string tmp;
unsigned int pos;
while (str.find("\n") != std::string::npos && this->level != MAX)
{
pos = str.find("\n");
tmp = str.substr(0, pos);
if (tmp.find("message") == 0)
Check_msg(tmp);
else if (tmp.find("deplacement") == 0)
{}
else if (tmp.find("mort") == 0)
throw My_Exception("Sorry you are dead.");
else if (!this->rep.empty())
(this->*actions[this->rep.front()])(tmp);
str = str.substr(pos + 1);
}
}
static int LB_write_internal (int lbd, const char *msg, int length, LB_id_t id)
{
LB_struct *lb;
unsigned int num_ptr, org_num_ptr;
int ptr, nmsgs;
int n_rm;
LB_dir *dir;
int loc, new_space;
int ret, ind, tag;
if ((length < 0 && msg != DELETE_FLAG) || (length > 0 && msg == NULL) ||
(id > LB_MAX_ID && id != LB_ANY)) /* check arguments */
return (LB_BAD_ARGUMENT);
/* get the LB structure, lock and mmap the file */
lb = LB_Get_lb_structure (lbd, &ret);
if (lb == NULL)
return (ret);
if ((ret = LB_lock_mmap (lb, WRITE_PERM, EXC_LOCK)) < 0)
return (LB_Unlock_return (lb, ret));
if (!(lb->flags & LB_WRITE)) /* check write flag */
return (LB_Unlock_return (lb, LB_BAD_ACCESS));
if ((lb->flags & LB_DIRECT) && /* check direct access lock */
LB_direct_access_lock (lb, TEST_LOCK, 0) != 0)
return (LB_Unlock_return (lb, LB_BAD_ACCESS));
if (length <= 0 && !(lb->flags & LB_DB))
return (LB_Unlock_return (lb, LB_BAD_ARGUMENT));
if (msg == DELETE_FLAG && (lb->hd->miscflags & LB_ID_BY_USER))
return (LB_Unlock_return (lb, LB_NOT_SUPPORTED));
if (lb->active_test) { /* test LB_ACTIVE_SV_LOCK_OFF lock */
ret = LB_process_lock (TEST_LOCK, lb, EXC_LOCK, LB_ACTIVE_SV_LOCK_OFF);
if (ret != LB_LOCKED)
return (LB_Unlock_return (lb, LB_NOT_ACTIVE));
}
if (C_and_w && Check_msg (lb, msg, length, id))
return (LB_Unlock_return (lb, 0));
org_num_ptr = lb->hd->num_pt; /* save for evaluating # expired msgs */
if (lb->utag != NULL)
tag = *(lb->utag);
else
tag = 0;
/* process message replacing */
if (lb->flags & LB_DB) {
ret = Replace_message (lb, id, length, msg, tag);
if (ret != MSG_NOT_REPLACED)
return (LB_Unlock_return (lb, ret));
}
/* find the write pointer and the new dir slot */
num_ptr = lb->hd->num_pt;
ptr = GET_POINTER (num_ptr);
ind = ptr % lb->n_slots; /* new slot index */
nmsgs = GET_NMSG (num_ptr) + 1; /* msg number including the new */
if (lb->flags & LB_DB) {
if (id != LB_ANY && (lb->hd->miscflags & LB_MSG_DELETED))
return (LB_Unlock_return (lb, LB_NOT_SUPPORTED));
if (nmsgs > lb->maxn_msgs)
return (LB_Unlock_return (lb, LB_FULL));
}
/* get free space */
loc = new_space = 0;
if (length > 0)
loc = LB_sms_get_free_space (lb, length, &new_space);
if (loc < 0)
return (LB_Unlock_return (lb, loc));
/* write the message */
if (length > 0 &&
(ret = Write_msg_body (lb, loc, length, msg, new_space)) < 0)
return (LB_Unlock_return (lb, ret));
/* update the dir slot and the msg info */
dir = lb->dir + ind;
if (lb->flags & LB_DB) {
LB_msg_info_t *msginfo;
dir->loc = 0; /* for ucnt */
msginfo = (LB_msg_info_t *)lb->msginfo + DB_WORD_OFFSET (ind, 0);
msginfo->len = length;
msginfo->loc = loc;
}
else if (lb->ma_size == 0) {
LB_msg_info_seq_t *msginfo;
dir->loc = loc;
msginfo = (LB_msg_info_seq_t *)lb->msginfo + ind;
msginfo->len = length;
}
else
dir->loc = (loc + length) % lb->ma_size;
{ /* find the previous id and check if the LB is of non-decreasing ID */
LB_id_t prid;
/* this works since the entire control area is initialized to 0 */
if (nmsgs > 1) { /* find previous id */
int ppt; /* pointer to the previous slot */
ppt = ptr - 1;
if (ppt < 0)
ppt = lb->ptr_range - 1;
prid = (lb->dir [ppt % lb->n_slots]).id;
}
else
prid = 0;
if (id == LB_ANY) /* new id */
id = (lb_t)((prid + 1) % (unsigned int)(LB_MAX_ID + 1));
else
lb->hd->miscflags |= LB_ID_BY_USER;
if (id < prid && nmsgs > 1) /* The LB is not of non-decreasing ID */
lb->hd->non_dec_id &= 0xfe;
}
dir->id = id;
/* write the tag for the new message */
if (lb->hd->tag_size > 0)
LB_write_tag (lb, ind, tag, 0);
/* process nrs and update LB time */
if (lb->off_nra > 0 &&
(ret = LB_process_nr (lb, id, length, tag,
N_MSG_RM_COMPU, org_num_ptr)) < 0)
return (LB_Unlock_return (lb, ret));
lb->hd->lb_time = time (NULL);
/* update num_ptr and page number */
if (nmsgs > lb->maxn_msgs)
n_rm = nmsgs - lb->maxn_msgs; /* number of messages to remove */
else
n_rm = 0;
LB_Update_pointer (lb, 1, n_rm); /* we add one new message */
if (((lb->flags & LB_DB) || lb->ma_size == 0) &&
length > 0) /* sets sms_ok flag */
lb->hd->sms_ok = 1;
if (nmsgs > lb->maxn_msgs && lb->ma_size == 0) {
int ln, lc, p;
p = ptr - nmsgs + 1 + lb->n_slots;
ln = LB_Get_message_info (lb, p, &lc, NULL);
LB_sms_free_space (lb, lc, ln);
}
if (lb->flags & LB_SHARE_STREAM) {
int exppt = (GET_POINTER (lb->hd->num_pt) + lb->ptr_range -
(lb->maxn_msgs + 1)) % lb->ptr_range;
if (LB_Ptr_compare (lb, exppt, (int)lb->hd->ptr_read) > 0)
lb->hd->ptr_read = exppt;
} /* advance ptr_read to keep close to the available msgs */
lb->prev_id = id;
if (lb->umid != NULL)
*lb->umid = id;
if (length < 0)
length = 0;
return (LB_Unlock_return (lb, length));
}