Method isString

ij/src/main/java/ij/macro/Interpreter.java:1233–1257

(int pcLoc)

	// Returns true if the token at the specified location is a string
	boolean isString(int pcLoc) {
		int tok = pgm.code[pcLoc];
		if ((tok&0xff)==VARIABLE_FUNCTION) {
			int address = tok>>TOK_SHIFT;
			int type = pgm.table[address].type;
			int token2 = pgm.code[pcLoc+2];
			String name = pgm.table[token2>>TOK_SHIFT].str;
			if (Functions.isStringFunction(name,type))
				return true; 
		}
		if ((tok&TOK_MASK)!=WORD)
			return false;
		Variable v = lookupVariable(tok>>TOK_SHIFT);
		if (v==null)
			return false;
		if (pgm.code[pcLoc+1]=='[') {
			Variable[] array = v.getArray();
			if (array!=null && array.length>0)
				return array[0].getType()==Variable.STRING;
		}
		int type = v.getType();
		if (type==Variable.STRING && (pgm.code[pcLoc+1]&0xff)=='.' && (pgm.code[pcLoc+2]&0xff)!=STRING_FUNCTION)
			return false;
		return type==Variable.STRING;
	}

	double compareStrings(String s1, String s2, int op) {
		int result;