1 files changed, 52 insertions, 0 deletions
diff --git a/src/dolphin/CommonFuncs.cpp b/src/dolphin/CommonFuncs.cpp
new file mode 100644
index 0000000..f85051d
--- /dev/null
+++ b/src/dolphin/CommonFuncs.cpp
@@ -0,0 +1,52 @@
+// Copyright 2009 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license_dolphin.txt file included.
+
+#include <cstddef>
+#include <cstring>
+#include <errno.h>
+#include <type_traits>
+
+#include "CommonFuncs.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#define strerror_r(err, buf, len) strerror_s(buf, len, err)
+#endif
+
+constexpr size_t BUFFER_SIZE = 256;
+
+// Wrapper function to get last strerror(errno) string.
+// This function might change the error code.
+std::string LastStrerrorString()
+{
+  char error_message[BUFFER_SIZE];
+
+  // There are two variants of strerror_r. The XSI version stores the message to the passed-in
+  // buffer and returns an int (0 on success). The GNU version returns a pointer to the message,
+  // which might have been stored in the passed-in buffer or might be a static string.
+
+  // We check defines in order to figure out variant is in use, and we store the returned value
+  // to a variable so that we'll get a compile-time check that our assumption was correct.
+
+#if defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600))
+  const char* str = strerror_r(errno, error_message, BUFFER_SIZE);
+  return std::string(str);
+#else
+  int error_code = strerror_r(errno, error_message, BUFFER_SIZE);
+  return error_code == 0 ? std::string(error_message) : "";
+#endif
+}
+
+#ifdef _WIN32
+// Wrapper function to get GetLastError() string.
+// This function might change the error code.
+std::string GetLastErrorString()
+{
+  char error_message[BUFFER_SIZE];
+
+  FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
+                 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), error_message, BUFFER_SIZE, nullptr);
+  return std::string(error_message);
+}
+#endif