windows 是否有格式说明符始终表示带有 _tprintf 的字符字符串？
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Is there a format specifier that always means char string with _tprintf?
提问by hippietrail
When you build an app on Windows using TCHARsupport, %sin _tprintf()means char *string for Ansi builds and wchar_t *for Unicode builds while %Smeans the reverse.
当您使用TCHAR支持在 Windows 上构建应用程序时，%sin_tprintf()表示char *Ansi 构建和wchar_t *Unicode 构建的字符串，而%S反之亦然。
But are there any format specifiers that always mean char *string no matter if it's an Ansi or Unicode build? Since even on Windows UTF-16 is not really used for files or networking it turns out to still be fairly often that you'll want to deal with byte-based strings regardless of the native character type you compile your app as.
但是，是否有任何格式说明符始终表示char *字符串，无论它是 Ansi 还是 Unicode 版本？由于即使在 Windows 上，UTF-16 也没有真正用于文件或网络，因此无论您编译应用程序的本机字符类型如何，您仍然需要处理基于字节的字符串。
采纳答案by Remy Lebeau
The hmodifier forces both %sand %Sto char*, and the lmodifier forces both to wchar_t*, ie: %hs, %hS, %ls, and %lS.
该h修改的力和%s与%S以char*和l修改势力既 wchar_t*，即：%hs，%hS，%ls，和%lS。
回答by RKum
This might also solve your problem:
这也可能解决您的问题：
_TCHAR *message;
_tprintf(_T("\n>>>>>> %d") TEXT(" message is:%s\n"),4,message);
回答by KungPhoo
I found, that '_vsntprintf_s' uses '%s' for type TCHAR and works for both, GCC and MSVC. So you could wrap it like:
我发现，'_vsntprintf_s' 使用 '%s' 作为 TCHAR 类型并且适用于 GCC 和 MSVC。所以你可以像这样包装它：
int myprintf(const TCHAR* lpszFormat, va_list argptr) {
int len = _vsctprintf(lpszFormat, argptr); // -1:err
if (len<=0) {return len;}
auto* pT = new TCHAR[2 + size_t(len)];
_vsntprintf_s(pT, (2+len)*sizeof(TCHAR), 1+len, lpszFormat, argptr);
int rv = printf("%ls", pT);
delete[] pT;
return rv;
}
int myprintf(const TCHAR* lpszFormat, ...) {
va_list argptr;
va_start(argptr, lpszFormat);
int rv = myprintf(lpszFormat, argptr);
va_end(argptr);
return rv;
}
int main(int, char**) { return myprintf(_T("%s"), _T("Test")); }
回答by Matteo Italia
You can easily write something like this:
你可以很容易地写出这样的东西：
#ifdef _UNICODE
#define PF_ASCIISTR "%S"L
#define PF_UNICODESTR "%s"L
#else
#define PF_ASCIISTR "%s"
#define PF_UNICODESTR "%S"
#endif
and then you use the PF_ASCIISTRor the PF_UNICODESTRmacros in your format string, exploiting the C automatic string literals concatenation:
然后在格式字符串中使用PF_ASCIISTR或PF_UNICODESTR宏，利用 C 自动字符串文字连接：
_tprintf(_T("There are %d ") PF_ASCIISTR _T(" over the table"), 10, "pens");
