widestring

I have a program that utilizes a Windows API via a C FFI (via winapi-rs). One of the functions expects a pointer to a pointer to a string as an output parameter. The function will store its result into this string. I'm using a variable of type WideCString for this string. Can I "just" pass in a mutable ref to a ref to a string into this function (inside an unsafe block) or should I rather use a functionality like .into_raw() and .from_raw() that also moves the ownership of the variable to the C function? Both versions compile and work but I'm wondering whether I'm buying any disadvantages with

I'm using swprintf to build a string into a buffer (using a loop among other things). const int MaxStringLengthPerCharacter = 10 + 1; wchar_t* pTmp = pBuffer; for ( size_t i = 0; i < nNumPlayers ; ++i) { const int nPlayerId = GetPlayer(i); const int nWritten = swprintf(pTmp, MaxStringLengthPerCharacter, TEXT("%d,"), nPlayerId); assert(nWritten >= 0 ); pTmp += nWritten; } *pTaskPlayers = '\0'; If during testing the assert never hits, can I be sure that it will never hit in live code? That is, do I need to check if nWritten < 0 and handle that, or can I safely assume that there won't be a

I'm trying to convert string to 'LPCTSTR', but, i got following error. Error : cannot convert from 'const char *' to 'LPCTSTR' code: std::string str = "helloworld"; LPCTSTR lp = str.c_str(); Also, tried : LPCTSTR lp = (LPCTSTR)str.c_str(); But, print garbage value. Zebrafish LPCTSTR means (long pointer to constant TCHAR string). A TCHAR can either be wchar_t or char based on what your project settings are. If, in your project settings, in the "General" tab, your character set is "Use Multi-byte character set" then TCHAR is an alias for char . However, if it's set to "Use Unicode character set"

I'm using Delphi7 (non-unicode VCL), I need to store lots of WideStrings inside a TFileStream. I can't use TStringStream as the (wide)strings are mixed with binary data, the format is projected to speed up loading and writing the data ... However I believe that current way I'm loading/writing the strings might be a bottleneck of my code ... currently I'm writing length of a string, then writing it char by char ... while loading, first I'm loading the length, then loading char by char ... So, what is the fastest way to save and load WideString to TFileStream? Thanks in advance Rob Kennedy

My code is basically this: wstring japan = L"日本"; wstring message = L"Welcome! Japan is "; message += japan; wprintf(message.c_str()); I'm wishing to use wide strings but I do not know how they're outputted, so I used wprintf. When I run something such as: ./widestr | hexdump The hexidecimal codepoints create this: 65 57 63 6c 6d 6f 21 65 4a 20 70 61 6e 61 69 20 20 73 3f 3f e W c l m o ! e J p a n a i s ? ? Why are they all jumped in order? I mean if the wprintf is wrong I still don't get why it'd output in such a specific jumbled order! edit: endianness or something? they seem to rotate each