1 files changed, 59 insertions, 0 deletions
diff --git a/c/common.h b/c/common.h
new file mode 100644
index 0000000..a6bba23
--- /dev/null
+++ b/c/common.h
@@ -0,0 +1,59 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <memory>
+#include <optional>
+#include <stdexcept>
+#include <windows.h>
+
+TCHAR *TszFromSz(const char *, int);
+struct Win32Error : public std::exception
+{
+	Win32Error(DWORD);
+	~Win32Error(void);
+	virtual const char *what(void) const noexcept override;
+private:
+	DWORD m_dwErr;
+	char *m_szMsg = NULL;
+};
+struct Library
+{
+	Library(const TCHAR *);
+	~Library(void);
+	FARPROC GetProcAddress(const char *);
+private:
+	HMODULE m_hModule;
+};
+
+#ifdef UNICODE
+#define WA "W"
+#else
+#define WA "A"
+#endif
+
+inline int Cmp(int a, int b)
+{
+	if (a == b)
+		return 0;
+	if (a > b)
+		return 1;
+	return -1;
+}
+
+inline int Dpi(int i)
+{
+	extern int g_iDPI;
+	return MulDiv(i, g_iDPI, 96);
+}
+
+template <class T, typename ...A>
+std::optional<T> try_make(A ...args)
+{
+	try {
+		return T(args...);
+	} catch (...) {
+		return {};
+	}
+}
+
+#endif