Separate cpu detection and printing logic

src/detection/cpu/cpu_linux.c

@@ -0,0 +1,102 @@
+#include "cpu.h"
+#include "common/io.h"
+#include "common/properties.h"
+#include "detection/temps.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+
+static void parseCpuInfo(FFCPUResult* cpu, FFstrbuf* physicalCoresBuffer)
+{
+    FILE* cpuinfo = fopen("/proc/cpuinfo", "r");
+    if(cpuinfo == NULL)
+        return;
+
+    char* line = NULL;
+    size_t len = 0;
+
+    while(getline(&line, &len, cpuinfo) != -1)
+    {
+        //Stop after the first CPU
+        if(cpu->name.length > 0 && (*line == '\0' || *line == '\n'))
+            break;
+
+        (void)(
+            ffParsePropLine(line, "model name :", &cpu->name) ||
+            ffParsePropLine(line, "vendor_id :", &cpu->vendor) ||
+            ffParsePropLine(line, "cpu cores :", physicalCoresBuffer) ||
+            (cpu->name.length == 0 && ffParsePropLine(line, "Hardware :", &cpu->name)) //For Android devices
+        );
+    }
+
+    if(line != NULL)
+        free(line);
+
+    fclose(cpuinfo);
+}
+
+static double getGHz(const char* file)
+{
+    FFstrbuf content;
+    ffStrbufInit(&content);
+    ffReadFileBuffer(file, &content);
+    double herz = ffStrbufToDouble(&content);
+    ffStrbufDestroy(&content);
+
+    //ffStrbufToDouble failed
+    if(herz != herz)
+        return 0;
+
+    herz /= 1000.0; //to MHz
+    return herz / 1000.0; //to GHz
+}
+
+static double getFrequency(const char* info, const char* scaling)
+{
+    double frequency = getGHz(info);
+    if(frequency > 0.0)
+        return frequency;
+
+    return getGHz(scaling);
+}
+
+static double detectCPUTemp()
+{
+    const FFTempsResult *temps = ffDetectTemps();
+
+    for(uint32_t i = 0; i < temps->values.length; i++)
+    {
+        FFTempValue* value = ffListGet(&temps->values, i);
+
+        if(
+            ffStrbufFirstIndexS(&value->name, "cpu") < value->name.length ||
+            ffStrbufCompS(&value->name, "k10temp") == 0 ||
+            ffStrbufCompS(&value->name, "coretemp") == 0
+        ) return value->value;
+    }
+
+    return FF_CPU_TEMP_UNSET;
+}
+
+void ffDetectCPUImpl(FFCPUResult* cpu)
+{
+    ffStrbufInit(&cpu->name);
+    ffStrbufInit(&cpu->vendor);
+
+    FFstrbuf physicalCoresBuffer;
+    ffStrbufInit(&physicalCoresBuffer);
+
+    parseCpuInfo(cpu, &physicalCoresBuffer);
+
+    cpu->coresPhysical = ffStrbufToUInt16(&physicalCoresBuffer, 1);
+    cpu->coresLogical = (uint16_t) get_nprocs_conf();
+    cpu->coresOnline = (uint16_t) get_nprocs();
+
+    #define BP "/sys/devices/system/cpu/cpufreq/policy0/"
+    cpu->frequencyMin = getFrequency(BP"cpuinfo_min_freq", BP"scaling_min_freq");
+    cpu->frequencyMax = getFrequency(BP"cpuinfo_max_freq", BP"scaling_max_freq");
+
+    cpu->temperature = detectCPUTemp();
+
+    ffStrbufDestroy(&physicalCoresBuffer);
+}