Using Packet with SocketTCP

[tobix10]

I would like to receive emails from POP3 server. SocketTCP's function Receive can only be used with char* argument and that works, but some fields in header and text are encoded(utf-8 etc). I've read that sf::Packet could get wstring data so I tried to used it, but I have a problem.

Receive function return sf::Socket::Disconnected and object of class Packet is empty, although myPendingPacket contains all data(with sequence '.\r\n' at the end). myPendingPacketSize is -1.
I used sockets in blocking mode.

Is it a good way to get data as wide characters? If yes, why SocketTCP doesn't fill Packet object ?

[Laurent]

SFML packets have their own protocol (they send the total size first, then the data), so you can't receive a SFML packet if the other side didn't send a SFML packet as well.

But anyway, it wouldn't help with string encodings. You can rather use the sf::Unicode stuff in the system module, or another library specialized in this kind of stuff.

[tobix10]

Thank you, but
Can I convert UTF8 to ANSI using sf::Unicode ? Example please.

[Laurent]

There's no direct UTF-8 -> ANSI conversion available in SFML, but you can do it with sf::Unicode::UTF8ToUTF32 and sf::Unicode::UTF32ToANSI.

Code: [Select]

std::string utf8 = ...;

sf::Unicode::UTF32String utf32;
sf::Unicode::UTF8ToUTF32(utf8.begin(), utf8.end(), std::back_inserter(utf32));

std::string ansi;
sf::Unicode::UTF32ToANSI(utf32.begin(), utf32.end(), std::back_inserter(ansi));

If you're interested, this kind of conversion is easier in SFML 2.

Code: [Select]

std::string utf8 = ...;
sf::Utf8::ToAnsi(utf8.begin(), utf8.end(), std::back_inserter(ansi));

[tobix10]

Unfortunately I got linker errors when using first code.
I added sfml-system-d.lib and sfml-network-d.lib to project options.
Error is caused by UTF8ToUTF32.

unresolved external symbol "private: static unsigned int const * const sf::Unicode::UTF8Offsets" (?UTF8Offsets@Unicode@sf@@0QBIB)
unresolved external symbol "private: static int const * const sf::Unicode::UTF8TrailingBytes" (?UTF8TrailingBytes@Unicode@sf@@0QBHB)

[Laurent]

Have you defined SFML_DYNAMIC?

[tobix10]

No.
Now it is working , but I'll be getting text with quoted-printable or base64 encoding. Does sfml support encoding them ?

Sorry for bothering you

[Laurent]

No no, SFML doesn't handle this kind of encodings. Basically, SFML is not made for this kind of stuff (conversions between string encodings), it's implemented only for convenience and for my own internal needs.

You probably need a library which is dedicated to that, that will be better than hacking with SFML

[tobix10]

Ok, thx a lot 4 all.