windows - library path find, also windows build fixes

1 files changed, 57 insertions, 0 deletions

diff --git a/src/PlatformUtils-win.cc b/src/PlatformUtils-win.cc
new file mode 100644
index 0000000..d06df51
--- /dev/null
+++ b/src/PlatformUtils-win.cc
@@ -0,0 +1,57 @@
+#include "PlatformUtils.h"
+#include "printutils.h"
+#include <windows.h>
+#define _WIN32_IE 0x0501 // SHGFP_TYPE_CURRENT
+#include <shlobj.h>
+
+// convert from windows api w_char strings (usually utf16) to utf8 std::string
+std::string winapi_wstr_to_utf8( std::wstring wstr )
+{
+	std::string utf8_str("");
+
+	UINT CodePage = CP_UTF8;
+	DWORD dwFlags = 0;
+	LPCSTR lpMultiByteStr = NULL;
+	int cbMultiByte = 0;
+	LPWSTR lpWideCharStr = &wstr[0];
+	int cchWideChar = (int)wstr.size();
+
+	int numbytes = MultiByteToWideChar( CodePage, dwFlags, lpMultiByteStr,
+		cbMultiByte, lpWideCharStr, cchWideChar );
+
+	cbMultiByte = numbytes;
+	lpMultiByteStr = &utf8_str[0];
+
+	int result = MultiByteToWideChar( CodePage, dwFlags, lpMultiByteStr,
+		cbMultiByte, lpWideCharStr, cchWideChar );
+
+	if (result != numbytes) {
+		PRINT("ERROR: error converting w_char str to utf8 string");
+	}
+
+	return utf8_str;
+}
+
+
+// retrieve the path to 'My Documents' for the current user under windows
+// In XP this is 'c:\documents and settings\username\my documents'
+// In Vista, 7, 8+ this is 'c:\users\username\documents'
+// This code may have problems with unusual dir types in Vista because
+// Mingw does not provide access to the updated SHGetKnownFolderPath
+std::string PlatformUtils::documentsPath()
+{
+	std::string retval;
+	std::wstring path(MAX_PATH,0);
+
+	HRESULT result = SHGetFolderPathW(NULL, CSIDL_PERSONAL, NULL,
+	  SHGFP_TYPE_CURRENT, &path[0]);
+
+	if (result == S_OK) {
+		path = std::wstring( path.c_str() ); // stip extra NULLs
+		retval = winapi_wstr_to_utf8( path );
+	} else {
+		PRINT("ERROR: Could not find My Documents location");
+		retval = "";
+	}
+	return retval;
+}