Re: How can I convert a ISO 8859-2 to UTF?

From:
James Kanze <james.kanze@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Fri, 23 Jan 2009 02:11:03 -0800 (PST)
Message-ID:
<45cf1582-b42c-4728-a4b7-b8adcf7951a6@l33g2000pri.googlegroups.com>
On Jan 23, 4:38 am, "focussedg...@gmail.com" <focussedg...@gmail.com>
wrote:

How can I convert a ISO 8859-2 to UTF?
How can I convert a ISO 8859-2 and ISO 8859-9 to UTF in c++?
Is there something similar in c++ as in Java ?
In Java we can simply create a new string(oldstring, "8859-2");
Is it that simple in c++?


No. The philosophy in C++ is that you use a single encoding
internally (say UTF-8), and do all of the code translation at
the system interface level (reading and writing); this is done
by imbuing an appropriate locale in the fstream doing the
reading or writing.

Of course, this philosophy falls down if you're reading or
writing from a socket, rather than a file. Either you have to
do the code translation in your streambuf, or on the byte buffer
you're working with. There is a facet, codecvt, which is
supposed to be used here (so we're back to locale), but I find
it anything but easy to use; in particular, it will not manage
the memory for you. (In your particular case, you can always
ensure a target buffer of six times the length when converting
8859-2 to UTF-8, and you're OK.) On many systems, there's also
an iconv function; as far as I can see, it doesn't do anything
the std::codecvt doesn't, but it may be easier to find the
necessary arguments than it is to find an appropriate locale.

--
James Kanze (GABI Software) email:james.kanze@gmail.com
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