early-access version 1255

src/common/misc.cpp

@@ -0,0 +1,38 @@
+// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstddef>
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <cerrno>
+#include <cstring>
+#endif
+
+#include "common/common_funcs.h"
+
+// Generic function to get last error message.
+// Call directly after the command or use the error num.
+// This function might change the error code.
+std::string GetLastErrorMsg() {
+    static constexpr std::size_t buff_size = 255;
+    char err_str[buff_size];
+
+#ifdef _WIN32
+    FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
+                   MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), err_str, buff_size, nullptr);
+    return std::string(err_str, buff_size);
+#elif defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600))
+    // Thread safe (GNU-specific)
+    const char* str = strerror_r(errno, err_str, buff_size);
+    return std::string(str);
+#else
+    // Thread safe (XSI-compliant)
+    const int success = strerror_r(errno, err_str, buff_size);
+    if (success != 0) {
+        return {};
+    }
+    return std::string(err_str);
+#endif
+}