
Question:
I've been trying to use the cpw library for some graphics things. I got it set up, and I seem to be having a problem compiling. Namely, in a string header it provides support for unicode via
#if defined(UNICODE) | defined(_UNICODE) #define altstrlen wstrlen #else #define altstrlen strlen
Now, there's no such thing as wstrlen on Windows afaik, so I tried changing that to wcslen, but now it gives me and error because it tried to convert a char * to a wchar_t *. I'm kinda scared that if I just had it use strlen either way, something else would screw up.
What do you think stackoverflow?
Solution:1
Maybe you can define wcslen
as wstrlen
before including the lib header:
#define wstrlen wcslen #include "cpw.h"
The error you are getting is likely to be due to you passing a char*
that into something that ends up calling one of those functions.
Solution:2
If your data is char* based to begin with, then there is no need to call a Unicode version of strlen(), just use the regular strlen() by itself, since it takes char* as input. Unless your char* data is actually UTF-8 encoded and you are trying to determine the unencoded Unicode length, in which case you need to decode the UTF-8 first before then calling wcslen().
Solution:3
If you're using Unicode on Windows, you need to change all of your character types to wchar_t
. That means, instead of:
char *str = "Hello World"; int len = strlen(str);
You need:
wchar_t *str = L"Hello World"; int len = wcslen(str);
Notice that the character type has been changed to wchar_t
and the string literal is prefixed with L
.
Solution:4
Visual Studio already has such macros, see tchar.h
.
#include <tchar.h> TCHAR *str = _T("Sample text"); int len = _tcslen(str);
-- will work in ANSI, MBCS and UNICODE mode depending on compiler settings.
For more details see this article.
Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
EmoticonEmoticon