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Double byte handling issue with path name

Split path name and file name from full path name for dobule byte folder name

ex. full path = c:\folder\filename.ext , and application needs to split path and file name from full name:

Seeking '/' (Back slash = 0x5c ) from the back. This method works fine in single byte environment. But it does not work in double byte environment.

Because '/' may appeared in tail byte of Japanese character. To prevent the issue, you have to determine if the character is tailing byte within double byte character, and seek '/' from the top as the following:

Windows API isleadbyte(); can be used to determine leading byte

Sample code in MBCS code:

NOTE: When splitting file name and extention from full file name, it should use the same method with this sample.

int i = iBackSlash =0;

char cSeparator = '\\';

char *p = sFullPath;

while( *p ) {

// skip double byte character

if ( isleadbyte(p) ) {

++i;

++p;

}

else {

// Find the last back slash in single byte character

if ( *p == cSeparator )

iBackSlash = i;

}

++i;

++p;

}

For more information: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_isleadbyte.asp

Split path name and file name from full path name using VC++

The best way to find out separator is using PathAddBackslash() CPath in class.

For more information : http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/vclrfCPathTAddBackslash.asp

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