Make the output of \inputencoding commands (and the change of output

[features.git] / src / support / docstream.C

diff --git a/src/support/docstream.C b/src/support/docstream.C
index 9f0b70187c5a747dbdaa31a3705583b502d43a0a..ac9a8ed23050ac38e91e9c28787dda125151e798 100644 (file)
--- a/src/support/docstream.C
+++ b/src/support/docstream.C
@@ -294,6 +294,32 @@ odocfstream::odocfstream(const char* s, std::ios_base::openmode mode,
        open(s, mode);
 }
 
+
+SetEnc setEncoding(string const & encoding)
+{
+       return SetEnc(encoding);
+}
+
+
+odocstream & operator<<(odocstream & os, SetEnc e)
+{
+       if (std::has_facet<iconv_codecvt_facet>(os.rdbuf()->getloc())) {
+               // This stream must be a file stream, since we never imbue
+               // any other stream with a locale having a iconv_codecvt_facet.
+               // Flush the stream so that all pending output is written
+               // with the old encoding.
+               os.flush();
+               std::locale locale(os.rdbuf()->getloc(),
+                       new iconv_codecvt_facet(e.encoding, std::ios_base::out));
+               // FIXME Does changing the codecvt facet of an open file
+               // stream always work? It does with gcc 4.1, but I have read
+               // somewhere that it does not with MSVC.
+               // What does the standard say?
+               os.imbue(locale);
+       }
+       return os;
+}
+
 }
 
 #if (!defined(HAVE_WCHAR_T) || SIZEOF_WCHAR_T != 4) && defined(__GNUC__)