add config facilities for loading/storing int list

src/engine/config.cpp

@@ -175,6 +175,33 @@ String DivConfig::getString(String key, String fallback) const {
   return fallback;
 }
 
+std::vector<int> DivConfig::getIntList(String key, std::initializer_list<int> fallback) const {
+  String next;
+  std::vector<int> ret;
+  try {
+    String val=conf.at(key);
+
+    for (char i: val) {
+      if (i==',') {
+        int num=std::stoi(next);
+        ret.push_back(num);
+        next="";
+      } else {
+        next+=i;
+      }
+    }
+    if (!next.empty()) {
+      int num=std::stoi(next);
+      ret.push_back(num);
+    }
+
+    return ret;
+  } catch (std::out_of_range& e) {
+  } catch (std::invalid_argument& e) {
+  }
+  return fallback;
+}
+
 bool DivConfig::has(String key) const {
   try {
     String test=conf.at(key);
@@ -212,6 +239,17 @@ void DivConfig::set(String key, String value) {
   conf[key]=value;
 }
 
+void DivConfig::set(String key, const std::vector<int>& value) {
+  String val;
+  bool comma=false;
+  for (int i: value) {
+    if (comma) val+=',';
+    val+=fmt::sprintf("%d",i);
+    comma=true;
+  }
+  conf[key]=val;
+}
+
 bool DivConfig::remove(String key) {
   return conf.erase(key);
 }

src/engine/config.h

@@ -22,6 +22,8 @@
 
 #include "../ta-utils.h"
 #include <map>
+#include <vector>
+#include <initializer_list>
 
 class DivConfig {
   std::map<String,String> conf;
@@ -44,6 +46,7 @@ class DivConfig {
     float getFloat(String key, float fallback) const;
     double getDouble(String key, double fallback) const;
     String getString(String key, String fallback) const;
+    std::vector<int> getIntList(String key, std::initializer_list<int> fallback) const;
 
     // check for existence
     bool has(String key) const;
@@ -55,6 +58,7 @@ class DivConfig {
     void set(String key, double value);
     void set(String key, const char* value);
     void set(String key, String value);
+    void set(String key, const std::vector<int>& value);
 
     // remove a config value
     bool remove(String key);