Fix memory collector

src/metrics/Collector.cpp

@@ -10,6 +10,8 @@
 #include <cstring>
 #include <algorithm>
 
+#include <iostream>
+
 namespace metrics
 {
 
@@ -203,14 +205,27 @@ namespace metrics
     Memory Collector::readMemory()
     {
         std::ifstream f("/proc/meminfo");
-        std::string key;
-        uint64_t value;
-        std::string unit;
+        if (!f)
+            return {};
 
-        uint64_t mem_total = 0, mem_available = 0, swap_total = 0, swap_available = 0, hugepages_total = 0, hugepages_available = 0, hugepages_size = 0;
+        uint64_t mem_total = 0;
+        uint64_t mem_available = 0;
+        uint64_t swap_total = 0;
+        uint64_t swap_available = 0;
+        uint64_t hugepages_total = 0;
+        uint64_t hugepages_available = 0;
+        uint64_t hugepages_size = 0;
 
-        while (f >> key >> value >> unit)
+        std::string line;
+        while (std::getline(f, line))
         {
+            std::istringstream iss(line);
+            std::string key;
+            uint64_t value = 0;
+            std::string unit;
+
+            iss >> key >> value >> unit; // unit может отсутствовать
+
             if (key == "MemTotal:")
                 mem_total = value * 1024;
             else if (key == "MemAvailable:")
@@ -224,19 +239,24 @@ namespace metrics
             else if (key == "HugePages_Free:")
                 hugepages_available = value;
             else if (key == "Hugepagesize:")
-                hugepages_size = value;
+                hugepages_size = value * 1024; // kB → bytes
         }
 
         Memory memory;
+
         memory.memory.total = mem_total;
         memory.memory.available = mem_available;
         memory.memory.used = mem_total - mem_available;
+
         memory.swap.total = swap_total;
         memory.swap.available = swap_available;
         memory.swap.used = swap_total - swap_available;
+
         memory.hugepages.total = hugepages_total * hugepages_size;
         memory.hugepages.available = hugepages_available * hugepages_size;
-        memory.hugepages.used = hugepages_total - hugepages_available;
+        memory.hugepages.used =
+            memory.hugepages.total - memory.hugepages.available;
+
         return memory;
     }