Some cpu/gpu stats parsing fixes

src/cpu.cpp

@@ -7,6 +7,7 @@
 #include <string.h>
 #include <algorithm>
 #include <regex>
+#include "string_utils.h"
 
 #ifndef PROCDIR
 #define PROCDIR "/proc"
@@ -24,10 +25,6 @@
 #define PROCCPUINFOFILE PROCDIR "/cpuinfo"
 #endif
 
-static bool starts_with(const std::string& s,  const char *t){
-	return s.rfind(t, 0) == 0;
-}
-
 void calculateCPUData(CPUData& cpuData,
 	unsigned long long int usertime,
 	unsigned long long int nicetime,
@@ -204,15 +201,14 @@ bool CPUStats::UpdateCPUData()
 bool CPUStats::UpdateCoreMhz() {
     m_coreMhz.clear();
     std::ifstream cpuInfo(PROCCPUINFOFILE);
-	std::string row;
-	int i = 0;
-    while (std::getline(cpuInfo, row)) {
-        CPUData& cpuData = m_cpuData[i];
-		if (row.find("MHz") != std::string::npos){
-			row = std::regex_replace(row, std::regex(R"([^0-9.])"), "");
-            cpuData.mhz = stoi(row);
-			i++;
-		}
+    std::string row;
+    size_t i = 0;
+    while (std::getline(cpuInfo, row) && i < m_cpuData.size()) {
+        if (row.find("MHz") != std::string::npos){
+            row = std::regex_replace(row, std::regex(R"([^0-9.])"), "");
+            if (!try_stoi(m_cpuData[i++].mhz, row))
+                m_cpuData[i++].mhz = 0;
+        }
     }
     return true;
 }

src/cpu_gpu.h

@@ -18,13 +18,10 @@
 using namespace std;
 
 int gpuLoad, gpuTemp, cpuTemp;
-string gpuLoadDisplay, cpuTempLocation;
-FILE *amdGpuFile, *amdTempFile, *cpuTempFile;
+FILE *amdGpuFile = nullptr, *amdTempFile = nullptr, *cpuTempFile = nullptr;
 
 
 int numCpuCores = std::thread::hardware_concurrency();
-size_t arraySize = numCpuCores + 1;
-// std::vector<Cpus> cpuArray;
 pthread_t cpuThread, gpuThread, cpuInfoThread, nvidiaSmiThread;
 
 string exec(string command) {
@@ -51,44 +48,42 @@ string exec(string command) {
 
 
 void *cpuInfo(void *){
-	char buff[6];
-	rewind(cpuTempFile);
+    rewind(cpuTempFile);
     fflush(cpuTempFile);
-   	fscanf(cpuTempFile, "%s", buff);
-	cpuTemp = stoi(buff) / 1000;
-	pthread_detach(cpuInfoThread);
-	
-	return NULL;
+    if (fscanf(cpuTempFile, "%d", &cpuTemp) != 1)
+        cpuTemp = 0;
+    cpuTemp /= 1000;
+    pthread_detach(cpuInfoThread);
+
+    return NULL;
 }
 
 void *getNvidiaGpuInfo(void *){
-		if (!nvmlSuccess)
-			checkNvidia();
-
-		if (nvmlSuccess){
-			getNvidiaInfo();	
-			gpuLoad = nvidiaUtilization.gpu;
-			gpuLoadDisplay = gpuLoad;
-			gpuTemp = nvidiaTemp;
-		}
-	
-	pthread_detach(nvidiaSmiThread);
-	return NULL;
+    if (!nvmlSuccess)
+        checkNvidia();
+
+    if (nvmlSuccess){
+        getNvidiaInfo();
+        gpuLoad = nvidiaUtilization.gpu;
+        gpuTemp = nvidiaTemp;
+    }
+
+    pthread_detach(nvidiaSmiThread);
+    return NULL;
 }
 
 void *getAmdGpuUsage(void *){
-	char buff[5];
-	rewind(amdGpuFile);
+    rewind(amdGpuFile);
     fflush(amdGpuFile);
-   	fscanf(amdGpuFile, "%s", buff);
-	gpuLoadDisplay = buff;
-	gpuLoad = stoi(buff);	
-	
-	rewind(amdTempFile);
+    if (fscanf(amdGpuFile, "%d", &gpuLoad) != 1)
+        gpuLoad = 0;
+
+    rewind(amdTempFile);
     fflush(amdTempFile);
-	fscanf(amdTempFile, "%s", buff);
-	gpuTemp = (stoi(buff) / 1000);
+    if (fscanf(amdTempFile, "%d", &gpuTemp) != 1)
+        gpuTemp = 0;
+    gpuTemp /= 1000;
 
-	pthread_detach(gpuThread);
-	return NULL;
+    pthread_detach(gpuThread);
+    return NULL;
 }