1 files changed, 108 insertions, 0 deletions
diff --git a/gnu/lib/libg++/iostream/indstream.C b/gnu/lib/libg++/iostream/indstream.C
new file mode 100644
index 0000000000000..b58e362d4bda6
--- /dev/null
+++ b/gnu/lib/libg++/iostream/indstream.C
@@ -0,0 +1,108 @@
+//    This is part of the iostream library, providing -*- C++ -*- input/output.
+//    Copyright (C) 1992 Per Bothner.
+//
+//    This library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Library General Public
+//    License as published by the Free Software Foundation; either
+//    version 2 of the License, or (at your option) any later version.
+//
+//    This library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Library General Public License for more details.
+//
+//    You should have received a copy of the GNU Library General Public
+//    License along with this library; if not, write to the Free
+//    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include <indstream.h>
+
+indirectbuf::indirectbuf(streambuf *get, streambuf *put, int delete_mode)
+: streambuf()
+{
+    _get_stream = get;
+    _put_stream = put == NULL ? get : put;
+    _delete_flags = delete_mode;
+}
+
+indirectbuf::~indirectbuf()
+{
+    if (_delete_flags & ios::in)  delete get_stream();
+    if (_delete_flags & ios::out)  delete put_stream();
+}
+
+int indirectbuf::xsputn(const char* s, int n)
+{
+    return put_stream()->sputn(s, n);
+}
+
+int indirectbuf::xsgetn(char* s, int n)
+{
+    return get_stream()->sgetn(s, n);
+}
+
+int indirectbuf::overflow(int c /* = EOF */)
+{
+    if (c == EOF)
+	return put_stream()->overflow(c);
+    else
+	return put_stream()->sputc(c);
+}
+
+int indirectbuf::underflow()
+{
+    return get_stream()->sbumpc();
+}
+
+streampos indirectbuf::seekoff(streamoff off, _seek_dir dir, int mode)
+{
+    int ret_val = 0;
+    int select = mode == 0 ? (ios::in|ios::out) : mode;
+    streambuf *gbuf = (select & ios::in) ? get_stream() : NULL;
+    streambuf *pbuf = (select & ios::out) ? put_stream() : NULL;
+    if (gbuf == pbuf)
+	ret_val = gbuf->seekoff(off, dir, mode);
+    else {
+	if (gbuf)
+	    ret_val = gbuf->seekoff(off, dir, ios::in);
+	if (pbuf && ret_val != EOF)
+	    ret_val = pbuf->seekoff(off, dir, ios::out);
+    }
+    return ret_val;
+}
+
+streampos indirectbuf::seekpos(streampos pos, int mode)
+{
+    int ret_val = EOF;
+    int select = mode == 0 ? (ios::in|ios::out) : mode;
+    streambuf *gbuf = (select & ios::in) ? get_stream() : NULL;
+    streambuf *pbuf = (select & ios::out) ? put_stream() : NULL;
+    if (gbuf == pbuf)
+	ret_val = gbuf->seekpos(pos, mode);
+    else {
+	if (gbuf)
+	    ret_val = gbuf->seekpos(pos, ios::in);
+	if (pbuf && ret_val != EOF)
+	    ret_val = pbuf->seekpos(pos, ios::out);
+    }
+    return ret_val;
+}
+
+int indirectbuf::sync()
+{
+    streambuf *gbuf = get_stream();
+    int ret_val = gbuf->sync();
+    if (ret_val == EOF) return ret_val;
+    streambuf *pbuf = put_stream();
+    if (pbuf != gbuf) return pbuf->sync();
+    else return ret_val;
+}
+
+int indirectbuf::pbackfail(int c)
+{
+    return get_stream()->sputbackc(c);
+}