public static RString substring(RString text, RDouble first, RDouble last, ASTNode ast) {
int textSize = text.size();
int firstSize = first.size();
int lastSize = last.size();
int textIndex = 0;
int firstIndex = 0;
int lastIndex = 0;
if (textSize == 0) { return RString.EMPTY; }
if (firstSize == 0) { throw RError.getInvalidArgument(ast, "first"); }// not exactly R-warning
if (lastSize == 0) { throw RError.getInvalidArgument(ast, "last"); } // not exactly R-warning
int n = Math.max(textSize, Math.max(firstSize, lastSize));
String[] content = new String[n];
for (int i = 0; i < n; i++) {
double nfirst = first.getDouble(firstIndex++);
if (firstIndex == firstSize) {
firstIndex = 0;
}
double nlast = last.getDouble(lastIndex++);
if (lastIndex == lastSize) {
lastIndex = 0;
}
String str = text.getString(textIndex++);
if (textIndex == textSize) {
textIndex = 0;
}
if (!RDouble.RDoubleUtils.isNAorNaN(nfirst) && !RDouble.RDoubleUtils.isNAorNaN(nlast) && str != RString.NA) {
int stp = (int) nlast;
int len = str.length();
if (stp > len) {
stp = len;
}
content[i] = str.substring(((int) nfirst) - 1, stp);
} else {
content[i] = RString.NA;
}
}
return RString.RStringFactory.getFor(content);
}
@Override public RNode create(ASTNode call, RSymbol[] names, RNode[] exprs) {
ArgumentInfo ia = check(call, names, exprs);
boolean product = false;
if (ia.provided("FUN")) {
RNode fnode = exprs[ia.position("FUN")];
if (fnode instanceof Constant) {
RAny value = ((Constant) fnode).execute(null);
if (value instanceof RString) {
RString str = (RString) value;
if (str.size() == 1) {
if (str.getString(0).equals("*")) {
product = true;
}
}
}
}
} else {
product = true;
}
if (product) {
return new MatrixOperation.OuterProduct(call, exprs[ia.position("X")], exprs[ia.position("Y")]);
}
int cnArgs = 2 + names.length - 3; // "-2" because both FUN, X, Y
RSymbol[] cnNames = new RSymbol[cnArgs];
RNode[] cnExprs = new RNode[cnArgs];
cnNames[0] = null;
ValueProvider xArgProvider = new ValueProvider(call);
cnExprs[0] = xArgProvider;
ValueProvider yArgProvider = new ValueProvider(call);
cnExprs[1] = yArgProvider;
ValueProvider[] constantArgProviders = new ValueProvider[cnArgs];
int j = 0;
for (int i = 0; i < names.length; i++) {
if (ia.position("X") == i || ia.position("Y") == i || ia.position("FUN") == i) {
continue;
}
cnNames[2 + j] = names[i];
ValueProvider vp = new ValueProvider(call);
cnExprs[2 + j] = vp;
constantArgProviders[j] = vp;
j++;
}
RNode funExpr = exprs[ia.position("FUN")];
final CallableProvider callableProvider = new CallableProvider(funExpr.getAST(), funExpr);
final RNode callNode = FunctionCall.getFunctionCall(call, callableProvider, cnNames, cnExprs);
final int posX = ia.position("X");
final int posY = ia.position("Y");
final int posFUN = ia.position("FUN");
return new OuterBuiltIn(call, names, exprs, callNode, callableProvider, xArgProvider, yArgProvider, constantArgProviders) {
@Override public RAny doBuiltIn(Frame frame, RAny[] args) {
RAny argx = null;
RAny argy = null;
RAny argfun = null;
int k = 0;
for (int i = 0; i < args.length; i++) {
if (i == posX) {
argx = args[i];
} else if (i == posY) {
argy = args[i];
} else if (i == posFUN) {
argfun = args[i];
} else {
constantArgProviders[k].setValue(args[i]);
k++;
}
}
return outer(frame, argx, argy, argfun);
}
};
}