changed hashing function for products

src/DataStoreImpl.hpp

@@ -260,7 +260,7 @@ class DataStoreImpl {
         // hash the name to get the provider id
         long unsigned db_idx = 0;
         uint64_t hash;
-        hash = hashString(productID.m_key);
+        hash = hashString(productID.m_key.c_str(), sizeof(ItemDescriptor));
         ch_placement_find_closest(m_product_dbs.chi, hash, 1, &db_idx);
         return m_product_dbs.dbs[db_idx];
     }
@@ -386,7 +386,7 @@ class DataStoreImpl {
         // hash the name to get the provider id
         long unsigned db_idx = 0;
         uint64_t hash;
-        hash = hashString(containerName);
+        hash = hashString(containerName.c_str(), containerName.size());
         ch_placement_find_closest(m_dataset_dbs.chi, hash, 1, &db_idx);
         return m_dataset_dbs.dbs[db_idx];
     }

src/StringHash.hpp

@@ -8,10 +8,11 @@
 
 namespace hepnos {
 
-inline size_t hashString(const std::string& str) {
+inline size_t hashString(const char* str, size_t size) {
     size_t hash = 14695981039346656037ULL;
     size_t prime = 1099511628211ULL;
-    for(const auto& c : str) {
+    for(size_t i = 0; i < size; i++) {
+        char c = str[i];
         hash = hash ^ c;
         hash *= prime;
     }