// GhidraScript: DecompileByAddr.java
// Usage (headless):
//   analyzeHeadless <projDir> <projName> -process <progName> -noanalysis -readOnly \
//     -scriptPath <path> -postScript DecompileByAddr.java 0x401000 0x...
//
// Prints decompiled C for the function at (or containing) each address.

import ghidra.app.decompiler.DecompInterface;
import ghidra.app.decompiler.DecompileResults;
import ghidra.app.script.GhidraScript;
import ghidra.program.model.address.Address;
import ghidra.program.model.listing.Function;

public class DecompileByAddr extends GhidraScript {
    @Override
    public void run() throws Exception {
        String[] args = getScriptArgs();
        if (args == null || args.length == 0) {
            printerr("DecompileByAddr: needs one or more addresses, e.g. 0x63ea70");
            return;
        }

        DecompInterface decomp = new DecompInterface();
        decomp.openProgram(currentProgram);

        for (String a : args) {
            long va;
            try {
                va = Long.decode(a);
            } catch (Exception e) {
                printerr("bad address: " + a);
                continue;
            }

            Address addr = toAddr(va);
            if (addr == null) {
                printerr("addr not in program: " + a);
                continue;
            }

            Function f = getFunctionContaining(addr);
            if (f == null) f = getFunctionAt(addr);

            println("================================================================================");
            println("addr: " + addr);
            if (f == null) {
                println("(no function found)");
                continue;
            }
            println("function: " + f.getName() + " @ " + f.getEntryPoint());

            DecompileResults res = decomp.decompileFunction(f, 60, monitor);
            if (!res.decompileCompleted()) {
                println("(decompile failed)");
                continue;
            }
            String c = res.getDecompiledFunction().getC();
            // Keep output reasonable in headless logs; truncate if huge.
            if (c != null && c.length() > 120000) {
                c = c.substring(0, 120000) + "\n/* ... truncated ... */\n";
            }
            println(c);
        }
    }
}