Win32奇怪的Widechar行为

Question

I haven't used wide chars before. Here's the code from someone else:

char moduleFileName[512];
int size = ::GetModuleFileName(NULL,moduleFileName,sizeof(moduleFileName));
char c_drive[256];
char c_dir[256];
_splitpath_s(moduleFileName,c_drive,sizeof(c_drive),c_dir,sizeof(c_dir),NULL,0,NULL,0);
root = c_drive;
root.append(c_dir);

wchar_t moduleFileNameW[512];
int sizeW = ::GetModuleFileNameW(NULL,moduleFileNameW,sizeof(moduleFileNameW));
wchar_t w_drive[256];
wchar_t w_dir[256];
_wsplitpath_s(moduleFileNameW,w_drive,sizeof(w_drive),w_dir,sizeof(w_dir),NULL,0,NULL,0);
wroot = w_drive;
wroot.append(w_dir);

SEVEN_ZIP_EXE = wroot;
SEVEN_ZIP_EXE += L"\\7z.exe";

The point is to set a variable to where the 7z.exe file is. When I debug it on my Windows 7 Prof. 64 bit system I end up what look to me like invalid chars for wroot, eg

﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾ ﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾﻾쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌 쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌 Blockquote

Answer 1

Change your sizeof's to _countof's and that will fix your strange data problem.

You don't need both sets of functions. Use whichever set is appropriate for the application. If you need SEVEN_ZIP_EXE to be a wstring, then you can eliminate the char stuff.

Answer 2

The problem is sizeof, and if you really want to use this sizeof(w_dir)/sizeof(wchar_t)

I gather what you are trying to do is get the directory containing your executable. Rather than using the clumsy splitpath, I suggest the following:-

TCHAR   szBuff[FILENAME_MAX];
TCHAR   *ShortName;
GetFullPathName(moduleFileName, FILENAME_MAX, szBuff, &ShortName);
*(ShortName-1) = '\0';  // remove exe from path

szBuff will contain the directory, and ShortName points to the name.

The above code uses TCHAR and #define UNICODE, but you could change the functions names to the wchar names.