Kernel: add support for Windows

src/detection/kernel/kernel.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#ifndef FF_INCLUDED_detection_kernel_kernel
+#define FF_INCLUDED_detection_kernel_kernel
+
+#include "fastfetch.h"
+
+typedef struct FFKernelResult
+{
+    FFstrbuf sysname;
+    FFstrbuf release;
+    FFstrbuf version;
+    FFstrbuf error;
+} FFKernelResult;
+
+void ffDetectKernel(FFinstance* instance, FFKernelResult* result);
+
+#endif

src/detection/kernel/kernel_linux.c

@@ -0,0 +1,9 @@
+#include "kernel.h"
+
+void ffDetectKernel(FFinstance* instance, FFKernelResult* result)
+{
+    ffStrbufInit(&result->error);
+    ffStrbufInitS(&result->sysname, instance->state.utsname.sysname);
+    ffStrbufInitS(&result->release, instance->state.utsname.release);
+    ffStrbufInitS(&result->version, instance->state.utsname.version);
+}

src/detection/kernel/kernel_windows.cpp

@@ -0,0 +1,34 @@
+extern "C" {
+#include "kernel.h"
+}
+#include "util/windows/wmi.hpp"
+
+extern "C" void ffDetectKernel(FFinstance* instance, FFKernelResult* kernel)
+{
+    FF_UNUSED(instance);
+
+    ffStrbufInit(&kernel->error);
+
+    ffStrbufInitS(&kernel->sysname, "Windows_NT");
+    ffStrbufInit(&kernel->release);
+    ffStrbufInit(&kernel->version);
+
+    IEnumWbemClassObject* pEnumerator = ffQueryWmi(L"SELECT Version FROM Win32_OperatingSystem", &kernel->error);
+    if(!pEnumerator)
+        return;
+
+    IWbemClassObject *pclsObj = NULL;
+    ULONG uReturn = 0;
+
+    if(FAILED(pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn)) || uReturn == 0)
+    {
+        ffStrbufInitS(&kernel->error, "No WMI result returned");
+        pEnumerator->Release();
+        return;
+    }
+
+    ffGetWmiObjString(pclsObj, L"Version", &kernel->release);
+
+    pclsObj->Release();
+    pEnumerator->Release();
+}