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/* stdiobuf class implementation (non-inline functions).
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The PPL 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#include <ppl-config.h>
#include "stdiobuf.defs.hh"
namespace Parma_Polyhedra_Library {
stdiobuf::int_type
stdiobuf::uflow() {
ungetc_buf = getc(fp);
return ungetc_buf;
}
stdiobuf::int_type
stdiobuf::underflow() {
int_type c = getc(fp);
return ungetc(c, fp);
}
std::streamsize
stdiobuf::xsgetn(char_type* s, std::streamsize n) {
std::streamsize r = fread(s, 1, n, fp);
if (r > 0)
ungetc_buf = traits_type::to_int_type(s[r - 1]);
else
ungetc_buf = traits_type::eof();
return r;
}
stdiobuf::int_type
stdiobuf::pbackfail(int_type c) {
const int_type eof = traits_type::eof();
int_type u = traits_type::eq_int_type(c, eof) ? ungetc_buf : c;
ungetc_buf = eof;
return traits_type::eq_int_type(u, eof) ? eof : ungetc(u, fp);
}
std::streamsize
stdiobuf::xsputn(const char_type* s, std::streamsize n) {
return fwrite(s, 1, n, fp);
}
stdiobuf::int_type
stdiobuf::overflow(int_type c) {
const int_type eof = traits_type::eof();
if (traits_type::eq_int_type(c, eof))
return fflush(fp) ? eof : traits_type::not_eof(c);
else
return putc(c, fp);
}
int
stdiobuf::sync() {
return fflush(fp);
}
} // namespace Parma_Polyhedra_Library
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