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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <istream>
// basic_istream<charT,traits>& get(basic_streambuf<char_type,traits>& sb,
// char_type delim);
#include <istream>
#include <cassert>
template <class CharT>
class testbuf
: public std::basic_streambuf<CharT>
{
typedef std::basic_streambuf<CharT> base;
std::basic_string<CharT> str_;
public:
testbuf()
{
}
testbuf(const std::basic_string<CharT>& str)
: str_(str)
{
base::setg(const_cast<CharT*>(str_.data()),
const_cast<CharT*>(str_.data()),
const_cast<CharT*>(str_.data() + str_.size()));
}
std::basic_string<CharT> str() const
{return std::basic_string<CharT>(base::pbase(), base::pptr());}
protected:
virtual typename base::int_type
overflow(typename base::int_type __c = base::traits_type::eof())
{
if (__c != base::traits_type::eof())
{
int n = str_.size();
str_.push_back(__c);
str_.resize(str_.capacity());
base::setp(const_cast<CharT*>(str_.data()),
const_cast<CharT*>(str_.data() + str_.size()));
base::pbump(n+1);
}
return __c;
}
};
int main()
{
{
testbuf<char> sb("testing*...");
std::istream is(&sb);
testbuf<char> sb2;
is.get(sb2, '*');
assert(sb2.str() == "testing");
assert(is.good());
assert(is.gcount() == 7);
assert(is.get() == '*');
is.get(sb2, '*');
assert(sb2.str() == "testing...");
assert(is.eof());
assert(!is.fail());
assert(is.gcount() == 3);
}
{
testbuf<wchar_t> sb(L"testing*...");
std::wistream is(&sb);
testbuf<wchar_t> sb2;
is.get(sb2, L'*');
assert(sb2.str() == L"testing");
assert(is.good());
assert(is.gcount() == 7);
assert(is.get() == L'*');
is.get(sb2, L'*');
assert(sb2.str() == L"testing...");
assert(is.eof());
assert(!is.fail());
assert(is.gcount() == 3);
}
}
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