Convert to C++.

I already hit upon some object-oriented programming patterns in
*listview.c, so I felt that it would be natural to use this as an
opportunity to learn C++.

1 files changed, 29 insertions, 0 deletions

diff --git a/c/common.cpp b/c/common.cpp
new file mode 100644
index 0000000..63adb53
--- /dev/null
+++ b/c/common.cpp
@@ -0,0 +1,29 @@
+#include <windows.h>
+#include <SWI-Prolog.h>
+
+#include "resource.h"
+#include "defs.h"
+
+/* Convert normal string to TSTR using given codepage. */
+TCHAR *
+TszFromSz(const char *sz, int iCp)
+{
+	TCHAR *tsz;
+
+#ifdef UNICODE
+	int cbMultiByte, cchWideChar;
+
+	cbMultiByte = strlen(sz)+1;
+	cchWideChar = MultiByteToWideChar(iCp, 0, sz, cbMultiByte, NULL, 0);
+	tsz = (TCHAR *)malloc(cchWideChar*sizeof(WCHAR));
+	if (!tsz) return NULL;
+	if (!MultiByteToWideChar(iCp, 0, sz, cbMultiByte, tsz, cchWideChar))
+		return NULL;
+#else
+	tsz = malloc(strlen(sz)+1);
+	if (!tsz) return NULL;
+	strcpy(tsz, sz);
+#endif
+
+	return tsz;
+}