c++ - Performing string operations on data that might contain null \0 -

i'm implementing pluggable mime filter ie (this question concerns iinternetprotocol::read(void*, ulong, ulong*)) , i'm intercepting incoming html view modify html.

the html generally utf-8 encoded, except there \0 (null) characters, , sits inside char buffer. want load inside std::string instance can perform string operations such std::string::find inserting content (by copying substrings destination buffer around injected string, this:

string received( this->buffer ); size_t index = received.find("<p id=\"foo\">"); if( index != string::npos ) {      memcpy( destination             , received              , index );     memcpy( destination + index     , "injected content"    ,    17 );     memcpy( destination + index + 17, received.substr(index), received.size() - 17 - index ); } else {     memcpy( destination             , this->buffer          , this->buffersize ); } 

the problem buffer might contain null bytes (it's quirk of website i'm working with). extent \0 character values interact string operations such find? documentation on msdn nor cplusplus.com not say.