/** Generate code */
public void write(Environment env, DataOutputStream out, MemberDefinition field, ConstantPool tab)
throws IOException {
// listing(System.out);
if ((field != null) && field.getArguments() != null) {
int sum = 0;
Vector v = field.getArguments();
for (Enumeration e = v.elements(); e.hasMoreElements(); ) {
MemberDefinition f = ((MemberDefinition) e.nextElement());
sum += f.getType().stackSize();
}
maxvar = sum;
}
// Make sure the stack balances. Also calculate maxvar and maxstack
try {
balance(first, 0);
} catch (CompilerError e) {
System.out.println("ERROR: " + e);
listing(System.out);
throw e;
}
// Assign PCs
int pc = 0, nexceptions = 0;
for (Instruction inst = first; inst != null; inst = inst.next) {
inst.pc = pc;
int sz = inst.size(tab);
if (pc < 65536 && (pc + sz) >= 65536) {
env.error(inst.where, "warn.method.too.long");
}
pc += sz;
if (inst.opc == opc_try) {
nexceptions += ((TryData) inst.value).catches.size();
}
}
// Write header
out.writeShort(maxdepth);
out.writeShort(maxvar);
out.writeInt(maxpc = pc);
// Generate code
for (Instruction inst = first.next; inst != null; inst = inst.next) {
inst.write(out, tab);
}
// write exceptions
out.writeShort(nexceptions);
if (nexceptions > 0) {
// listing(System.out);
writeExceptions(env, out, tab, first, last);
}
}
/** Write the exceptions table */
void writeExceptions(
Environment env, DataOutputStream out, ConstantPool tab, Instruction first, Instruction last)
throws IOException {
for (Instruction inst = first; inst != last.next; inst = inst.next) {
if (inst.opc == opc_try) {
TryData td = (TryData) inst.value;
writeExceptions(env, out, tab, inst.next, td.getEndLabel());
for (Enumeration e = td.catches.elements(); e.hasMoreElements(); ) {
CatchData cd = (CatchData) e.nextElement();
// System.out.println("EXCEPTION: " + env.getSource() + ", pc=" + inst.pc + ", end=" +
// td.getEndLabel().pc + ", hdl=" + cd.getLabel().pc + ", tp=" + cd.getType());
out.writeShort(inst.pc);
out.writeShort(td.getEndLabel().pc);
out.writeShort(cd.getLabel().pc);
if (cd.getType() != null) {
out.writeShort(tab.index(cd.getType()));
} else {
out.writeShort(0);
}
}
inst = td.getEndLabel();
}
}
}