Util: Small improvements in gArgs usage

- Don't check gArgs.IsArgSet() is greater than 0
- Remove unneeded calls and local variables

src/httprpc.cpp

@@ -93,7 +93,7 @@ static bool multiUserAuthorized(std::string strUserPass)
     std::string strUser = strUserPass.substr(0, strUserPass.find(":"));
     std::string strPass = strUserPass.substr(strUserPass.find(":") + 1);
 
-    if (gArgs.IsArgSet("-rpcauth") > 0) {
+    if (gArgs.IsArgSet("-rpcauth")) {
         //Search for multi-user login/pass "rpcauth" from config
         BOOST_FOREACH(std::string strRPCAuth, gArgs.GetArgs("-rpcauth"))
         {

src/httpserver.cpp

@@ -197,8 +197,7 @@ static bool InitHTTPAllowList()
     rpc_allow_subnets.push_back(CSubNet(localv4, 8));      // always allow IPv4 local subnet
     rpc_allow_subnets.push_back(CSubNet(localv6));         // always allow IPv6 localhost
     if (gArgs.IsArgSet("-rpcallowip")) {
-        const std::vector<std::string>& vAllow = gArgs.GetArgs("-rpcallowip");
-        for (std::string strAllow : vAllow) {
+        for (const std::string& strAllow : gArgs.GetArgs("-rpcallowip")) {
             CSubNet subnet;
             LookupSubNet(strAllow.c_str(), subnet);
             if (!subnet.IsValid()) {
@@ -322,11 +321,10 @@ static bool HTTPBindAddresses(struct evhttp* http)
             LogPrintf("WARNING: option -rpcbind was ignored because -rpcallowip was not specified, refusing to allow everyone to connect\n");
         }
     } else if (gArgs.IsArgSet("-rpcbind")) { // Specific bind address
-        const std::vector<std::string>& vbind = gArgs.GetArgs("-rpcbind");
-        for (std::vector<std::string>::const_iterator i = vbind.begin(); i != vbind.end(); ++i) {
+        for (const std::string& strRPCBind : gArgs.GetArgs("-rpcbind")) {
             int port = defaultPort;
             std::string host;
-            SplitHostPort(*i, port, host);
+            SplitHostPort(strRPCBind, port, host);
             endpoints.push_back(std::make_pair(host, port));
         }
     } else { // No specific bind address specified, bind to any

src/init.cpp

@@ -741,7 +741,7 @@ void InitParameterInteraction()
             LogPrintf("%s: parameter interaction: -whitebind set -> setting -listen=1\n", __func__);
     }
 
-    if (gArgs.IsArgSet("-connect") && gArgs.GetArgs("-connect").size() > 0) {
+    if (gArgs.IsArgSet("-connect")) {
         // when only connecting to trusted nodes, do not seed via DNS, or listen by default
         if (SoftSetBoolArg("-dnsseed", false))
             LogPrintf("%s: parameter interaction: -connect set -> setting -dnsseed=0\n", __func__);
@@ -911,9 +911,9 @@ bool AppInitParameterInteraction()
         InitWarning(strprintf(_("Reducing -maxconnections from %d to %d, because of system limitations."), nUserMaxConnections, nMaxConnections));
 
     // ********************************************************* Step 3: parameter-to-internal-flags
-    if (gArgs.IsArgSet("-debug") > 0) {
+    if (gArgs.IsArgSet("-debug")) {
         // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
-        const std::vector<std::string>& categories = gArgs.GetArgs("-debug");
+        const std::vector<std::string> categories = gArgs.GetArgs("-debug");
 
         if (find(categories.begin(), categories.end(), std::string("0")) == categories.end()) {
             for (const auto& cat : categories) {
@@ -928,9 +928,8 @@ bool AppInitParameterInteraction()
     }
 
     // Now remove the logging categories which were explicitly excluded
-    if (gArgs.IsArgSet("-debugexclude") > 0) {
-        const std::vector<std::string>& excludedCategories = gArgs.GetArgs("-debugexclude");
-        for (const auto& cat : excludedCategories) {
+    if (gArgs.IsArgSet("-debugexclude")) {
+        for (const std::string& cat : gArgs.GetArgs("-debugexclude")) {
             uint32_t flag = 0;
             if (!GetLogCategory(&flag, &cat)) {
                 InitWarning(strprintf(_("Unsupported logging category %s=%s."), "-debugexclude", cat));
@@ -1105,10 +1104,9 @@ bool AppInitParameterInteraction()
         if (!chainparams.MineBlocksOnDemand()) {
             return InitError("BIP9 parameters may only be overridden on regtest.");
         }
-        const std::vector<std::string>& deployments = gArgs.GetArgs("-bip9params");
-        for (auto i : deployments) {
+        for (const std::string& strDeployment : gArgs.GetArgs("-bip9params")) {
             std::vector<std::string> vDeploymentParams;
-            boost::split(vDeploymentParams, i, boost::is_any_of(":"));
+            boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
             if (vDeploymentParams.size() != 3) {
                 return InitError("BIP9 parameters malformed, expecting deployment:start:end");
             }