(feat) optional threads argument to netscript functions hack, weaken, grow

src/NetscriptEvaluator.js

@@ -155,6 +155,21 @@ export function makeRuntimeRejectMsg(workerScript, msg, exp=null) {
     return "|"+workerScript.serverIp+"|"+workerScript.name+"|" + msg + lineNum;
 }
 
+export function resolveNetscriptRequestedThreads(workerScript, functionName, requestedThreads) {
+    const threads = workerScript.scriptRef.threads;
+    if (!requestedThreads) {
+        return isNaN(threads) || threads < 1 ? 1 : threads;
+    }
+    const requestedThreadsAsInt = requestedThreads|0;
+    if (isNaN(requestedThreads) || requestedThreadsAsInt < 1) {
+        throw makeRuntimeRejectMsg(workerScript, `Invalid thread count passed to ${functionName}: ${requestedThreads}. Threads must be a positive number.`);
+    }
+    if (requestedThreads > threads) {
+        throw makeRuntimeRejectMsg(workerScript, `Too many threads requested by ${functionName}. Requested: ${requestedThreads}. Has: ${threads}.`);
+    }
+    return requestedThreadsAsInt;
+}
+
 //Run a script from inside a script using run() command
 export function runScriptFromScript(server, scriptname, args, workerScript, threads=1) {
     //Check if the script is already running