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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <sstream>
// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
// class basic_stringbuf
// int_type overflow(int_type c = traits::eof());
#include <sstream>
#include <cassert>
#include "test_macros.h"
int overflow_called = 0;
template <class CharT>
struct testbuf
: public std::basic_stringbuf<CharT>
{
typedef std::basic_stringbuf<CharT> base;
explicit testbuf(const std::basic_string<CharT>& str,
std::ios_base::openmode which = std::ios_base::in | std::ios_base::out)
: base(str, which) {}
typename base::int_type
overflow(typename base::int_type c = base::traits_type::eof())
{++overflow_called; return base::overflow(c);}
void pbump(int n) {base::pbump(n);}
};
int main(int, char**)
{
// check overflow
{
testbuf<char> tb("");
tb.overflow();
}
{
testbuf<char> sb("abc");
assert(sb.sputc('1') == '1');
assert(sb.str() == "1bc");
assert(sb.sputc('2') == '2');
assert(sb.str() == "12c");
assert(sb.sputc('3') == '3');
assert(sb.str() == "123");
assert(sb.sputc('4') == '4');
assert(sb.str() == "1234");
assert(sb.sputc('5') == '5');
assert(sb.str() == "12345");
assert(sb.sputc('6') == '6');
assert(sb.str() == "123456");
assert(sb.sputc('7') == '7');
assert(sb.str() == "1234567");
assert(sb.sputc('8') == '8');
assert(sb.str() == "12345678");
assert(sb.sputc('9') == '9');
assert(sb.str() == "123456789");
assert(sb.sputc('0') == '0');
assert(sb.str() == "1234567890");
assert(sb.sputc('1') == '1');
assert(sb.str() == "12345678901");
}
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
{
testbuf<wchar_t> sb(L"abc");
assert(sb.sputc(L'1') == L'1');
assert(sb.str() == L"1bc");
assert(sb.sputc(L'2') == L'2');
assert(sb.str() == L"12c");
assert(sb.sputc(L'3') == L'3');
assert(sb.str() == L"123");
assert(sb.sputc(L'4') == L'4');
assert(sb.str() == L"1234");
assert(sb.sputc(L'5') == L'5');
assert(sb.str() == L"12345");
assert(sb.sputc(L'6') == L'6');
assert(sb.str() == L"123456");
assert(sb.sputc(L'7') == L'7');
assert(sb.str() == L"1234567");
assert(sb.sputc(L'8') == L'8');
assert(sb.str() == L"12345678");
assert(sb.sputc(L'9') == L'9');
assert(sb.str() == L"123456789");
assert(sb.sputc(L'0') == L'0');
assert(sb.str() == L"1234567890");
assert(sb.sputc(L'1') == L'1');
assert(sb.str() == L"12345678901");
}
#endif
{
testbuf<char> sb("abc", std::ios_base::app | std::ios_base::out);
assert(sb.sputc('1') == '1');
assert(sb.str() == "abc1");
assert(sb.sputc('2') == '2');
assert(sb.str() == "abc12");
}
return 0;
}
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