/**
* assign a string value to a symbol in R. The symbol is created if it doesn't exist already.
*
* @param sym symbol name. Currently assign uses CMD_setSEXP command of Rserve, i.e. the symbol
* value is NOT parsed. It is the responsibility of the user to make sure that the symbol name
* is valid in R (recall the difference between a symbol and an expression!). In fact R will
* always create the symbol, but it may not be accessible (examples: "bar\nfoo" or "bar$foo").
* @param ct contents
* @return <code>true</code> on success, otherwise <code>false</code>
*/
public void assign(String sym, String ct) throws RSrvException {
if (!connected || rt == null) throw new RSrvException(this, "Not connected");
byte[] symn = sym.getBytes();
byte[] ctn = ct.getBytes();
int sl = symn.length + 1;
int cl = ctn.length + 1;
if ((sl & 3) > 0) sl = (sl & 0xfffffc) + 4; // make sure the symbol length is divisible by 4
if ((cl & 3) > 0) cl = (cl & 0xfffffc) + 4; // make sure the content length is divisible by 4
byte[] rq = new byte[sl + 4 + cl + 4];
int ic;
for (ic = 0; ic < symn.length; ic++) rq[ic + 4] = symn[ic];
while (ic < sl) {
rq[ic + 4] = 0;
ic++;
}
for (ic = 0; ic < ctn.length; ic++) rq[ic + sl + 8] = ctn[ic];
while (ic < cl) {
rq[ic + sl + 8] = 0;
ic++;
}
Rtalk.setHdr(Rtalk.DT_STRING, sl, rq, 0);
Rtalk.setHdr(Rtalk.DT_STRING, cl, rq, sl + 4);
Rpacket rp = rt.request(Rtalk.CMD_setSEXP, rq);
if (rp != null && rp.isOk()) return;
throw new RSrvException(this, "assign failed", rp);
}
/**
* assign a content of a REXP to a symbol in R. The symbol is created if it doesn't exist already.
*
* @param sym symbol name. Currently assign uses CMD_setSEXP command of Rserve, i.e. the symbol
* value is NOT parsed. It is the responsibility of the user to make sure that the symbol name
* is valid in R (recall the difference between a symbol and an expression!). In fact R will
* always create the symbol, but it may not be accessible (examples: "bar\nfoo" or "bar$foo").
* @param ct contents. currently only basic types (int, double, int[], double[]) are supported.
* @return <code>true</code> on success, otherwise <code>false</code>
*/
public void assign(String sym, REXP r) throws RSrvException {
if (!connected || rt == null) throw new RSrvException(this, "Not connected");
int rl = r.getBinaryLength();
byte[] symn = sym.getBytes();
int sl = symn.length + 1;
if ((sl & 3) > 0) sl = (sl & 0xfffffc) + 4; // make sure the symbol length is divisible by 4
byte[] rq = new byte[sl + rl + ((rl > 0xfffff0) ? 12 : 8)];
int ic;
for (ic = 0; ic < symn.length; ic++) rq[ic + 4] = symn[ic];
while (ic < sl) {
rq[ic + 4] = 0;
ic++;
}
; // pad with 0
Rtalk.setHdr(Rtalk.DT_STRING, sl, rq, 0);
Rtalk.setHdr(Rtalk.DT_SEXP, rl, rq, sl + 4);
r.getBinaryRepresentation(rq, sl + ((rl > 0xfffff0) ? 12 : 8));
Rpacket rp = rt.request(Rtalk.CMD_setSEXP, rq);
if (rp != null && rp.isOk()) return;
throw new RSrvException(this, "assign failed", rp);
}
