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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.
//
//===----------------------------------------------------------------------===//
// <fstream>
// int_type overflow(int_type c = traits::eof());
// This test is not entirely portable
#include <fstream>
#include <cassert>
#include "platform_support.h" // locale name macros
template <class CharT>
struct test_buf
: public std::basic_filebuf<CharT>
{
typedef std::basic_filebuf<CharT> base;
typedef typename base::char_type char_type;
typedef typename base::int_type int_type;
typedef typename base::traits_type traits_type;
char_type* pbase() const {return base::pbase();}
char_type* pptr() const {return base::pptr();}
char_type* epptr() const {return base::epptr();}
void gbump(int n) {base::gbump(n);}
virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
};
int main()
{
{
test_buf<char> f;
assert(f.open("overflow.dat", std::ios_base::out) != 0);
assert(f.is_open());
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
assert(f.overflow('a') == 'a');
assert(f.pbase() != 0);
assert(f.pptr() == f.pbase());
assert(f.epptr() - f.pbase() == 4095);
}
{
test_buf<char> f;
assert(f.open("overflow.dat", std::ios_base::in) != 0);
assert(f.is_open());
assert(f.sgetc() == 'a');
}
std::remove("overflow.dat");
{
test_buf<char> f;
f.pubsetbuf(0, 0);
assert(f.open("overflow.dat", std::ios_base::out) != 0);
assert(f.is_open());
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
assert(f.overflow('a') == 'a');
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
}
{
test_buf<char> f;
assert(f.open("overflow.dat", std::ios_base::in) != 0);
assert(f.is_open());
assert(f.sgetc() == 'a');
}
std::remove("overflow.dat");
{
test_buf<wchar_t> f;
assert(f.open("overflow.dat", std::ios_base::out) != 0);
assert(f.is_open());
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
assert(f.overflow(L'a') == L'a');
assert(f.pbase() != 0);
assert(f.pptr() == f.pbase());
assert(f.epptr() - f.pbase() == 4095);
}
{
test_buf<wchar_t> f;
assert(f.open("overflow.dat", std::ios_base::in) != 0);
assert(f.is_open());
assert(f.sgetc() == L'a');
}
std::remove("overflow.dat");
{
test_buf<wchar_t> f;
f.pubsetbuf(0, 0);
assert(f.open("overflow.dat", std::ios_base::out) != 0);
assert(f.is_open());
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
assert(f.overflow(L'a') == L'a');
assert(f.pbase() == 0);
assert(f.pptr() == 0);
assert(f.epptr() == 0);
}
{
test_buf<wchar_t> f;
assert(f.open("overflow.dat", std::ios_base::in) != 0);
assert(f.is_open());
assert(f.sgetc() == L'a');
}
std::remove("overflow.dat");
{
test_buf<wchar_t> f;
f.pubimbue(std::locale(LOCALE_en_US_UTF_8));
assert(f.open("overflow.dat", std::ios_base::out) != 0);
assert(f.sputc(0x4E51) == 0x4E51);
assert(f.sputc(0x4E52) == 0x4E52);
assert(f.sputc(0x4E53) == 0x4E53);
}
{
test_buf<char> f;
assert(f.open("overflow.dat", std::ios_base::in) != 0);
assert(f.is_open());
assert(f.sbumpc() == 0xE4);
assert(f.sbumpc() == 0xB9);
assert(f.sbumpc() == 0x91);
assert(f.sbumpc() == 0xE4);
assert(f.sbumpc() == 0xB9);
assert(f.sbumpc() == 0x92);
assert(f.sbumpc() == 0xE4);
assert(f.sbumpc() == 0xB9);
assert(f.sbumpc() == 0x93);
assert(f.sbumpc() == -1);
}
std::remove("overflow.dat");
}
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