Some improvements to priority handling

Fixes issues with some strings that caused issues previously
For example: 4,,1 is now handled correctly

include/util.h

@@ -44,6 +44,7 @@ namespace Util
     std::string getHomeDir();
     std::string getConfigHome();
     std::string getCacheHome();
+    std::vector<std::string> tokenize(const std::string& str, const std::string& separator = ",");
 }
 
 #endif // UTIL_H

main.cpp

@@ -29,14 +29,11 @@ template<typename T> void set_vm_value(std::map<std::string, bpo::variable_value
 // Parse the priority string, making it an array of numeric codes, and override the ORed type if required
 void handle_priority(const std::string &what, const std::string &priority_string, std::vector<unsigned int> &priority, unsigned int &type)
 {
-    size_t idx = 0, found;
-
-    while ((found = priority_string.find(',', idx)) != std::string::npos)
+    std::vector<std::string> tokens = Util::tokenize(priority_string, ",");
+    for (std::vector<std::string>::iterator it = tokens.begin(); it != tokens.end(); it++)
     {
-	    priority.push_back(std::stoi(priority_string.substr(idx, found - idx)));
-	    idx = found + 1;
+        priority.push_back(std::stoi(*it));
     }
-    priority.push_back(std::stoi(priority_string.substr(idx)));
 
     unsigned int wanted = 0;
     #ifdef DEBUG

src/util.cpp

@@ -405,3 +405,22 @@ std::string Util::getCacheHome()
         cacheHome = Util::getHomeDir() + "/.cache";
     return cacheHome;
 }
+
+std::vector<std::string> Util::tokenize(const std::string& str, const std::string& separator)
+{
+    std::vector<std::string> tokens;
+    std::string token;
+    size_t idx = 0, found;
+    while ((found = str.find(separator, idx)) != std::string::npos)
+    {
+        token = str.substr(idx, found - idx);
+        if (!token.empty())
+            tokens.push_back(token);
+        idx = found + separator.length();
+    }
+    token = str.substr(idx);
+    if (!token.empty())
+        tokens.push_back(token);
+
+    return tokens;
+}