How to convert a void * to CString
Not much of a C++ developer and the multiple ways to handle strings a开发者_Go百科lways confuses me.
int Mine_SSL_Read(SSL* ssl, void* buf, int size)
{
int length = Real_SSL_Read(ssl, buf, size);
CString msg = ???
}
However I need to write a hook for SSL_Read function (OpenSSL) and that requires some C++ code. I need to convert buf which is of type void* and has a length of "length" into a CString so it can be parsed by other code.
Assuming the void*
is simply one-byte (ASCII
or similar) characters:
If you know it is NULL
terminated, you can simply cast it:
// ASCII
CString msg = reinterpret_cast<char*>(buf);
// UNICODE
CString msg = reinterpret_cast<wchar_t*>(buf);
If it is not NULL
terminated, or you don't know that fact, then you have to copy it byte by byte (I don't believe CString
has an assign
function similar to std::string).
CString msg;
char* str_buf = msg.GetBuffer();
char* msg_buf = reinterpret_cast<char*>(buf);
for(int x = 0; x < size; ++x)
*str_buf++ = *msg_buf++;
You can try using reinterpret_cast
,
CString msg = reinterpret_cast<wchar_t*>(buf);
it depends on what's in void buff. if it's char* a simple cast and CString constructor it's sufficient, otherwise you should convert wchar_t* to char*. Be sure that buffer is null terminated.
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