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Unicode version of ifstream class ?

Posted on 1997-06-19
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Last Modified: 2013-12-14
Where can I get a Unicode equivalent to the ifstream
class (ie. using TCHAR) ?

I am using Microsoft Visual C++ 4.2
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Question by:mongo061997
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Author Comment

by:mongo061997
ID: 1163977
Edited text of question
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Accepted Solution

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md041797 earned 100 total points
ID: 1163978
Just write an inserter and an extractor for your data type.

ostream &operator << (const TCHAR *c, ostream &out) {
    out << wstrlen (c)+1;
    out.write ((const char *)c, wstrlen (c)+1);
    return out;
    }

ostream &operator << (const TCHAR c, ostream &out) {
    out.write ((const char *)&c, sizeof (TCHAR));
    return out;
    }

istream &operator >> (TCHAR *c, istream &in) {
    int length;
    in >> length;
    in.read ((char *)c, length);
    return in;
    }

istream &operator >> (TCHAR c, istream &in) {
    in.read ((char *)&c, sizeof (TCHAR));
    return in;
    }



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Author Comment

by:mongo061997
ID: 1163979
Thank you, md.
The answer was technically good, but it needs adaptation
for IFSTREAM.
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Author Comment

by:mongo061997
ID: 1163980
Thank you, md.
The answer was very interesting, but I will need to adapt it
for IFSTREAM.
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LVL 4

Expert Comment

by:md041797
ID: 1163981
Since ifstream is derived from istream, these extractors will work as advertised.  The complier will cast the ifstream to istream automatically, so you can write:

ifstream in;
WCHAR UniChar;
in >> UniChar;
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