Nothing
#
# Returns the socket to the last opened database if any.
#
autosocket <- function(){
#
# Check that global variable "banknameSocket" exists:
#
if(!exists(x = "banknameSocket", envir = .seqinrEnv)){
stop("banknameSocket not found, try choosebank() first")
}
#
# Check that "banknameSocket" belongs to the sockconn class:
#
socket <- get("banknameSocket", .seqinrEnv)$socket
if(!inherits(socket, "sockconn")){
stop("banknameSocket$socket is not a sockconn")
}
#
# Check that the socket connection status is OK:
#
status <- summary(socket)
if(status[["class"]] != "sockconn"){
#
# for backward compatibility: in R 2.6.2 the result was "socket",
# so "socket" instead of "sockconn" is temporarilly allowed with
# a warning.
#
if(status[["class"]] != "socket"){
stop("socket is not a sockconn")
} else {
warning("backward compatibility patch used, upgrade your R version asap")
}
}
if(status[["opened"]] != "opened") stop("socket is not openend")
if(status[["can read"]] != "yes") stop("can't read on socket")
if(status[["can write"]] != "yes") stop("can't write on socket")
#
# Iff everything is OK return the socket:
#
return(socket)
}
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