You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <locale>
|
|
|
|
// wbuffer_convert<Codecvt, Elem, Tr>
|
|
|
|
// int_type underflow();
|
|
|
|
// This test is not entirely portable
|
|
|
|
#include <locale>
|
|
#include <codecvt>
|
|
#include <fstream>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
|
|
struct test_buf
|
|
: public std::wbuffer_convert<std::codecvt_utf8<wchar_t> >
|
|
{
|
|
typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > base;
|
|
typedef base::char_type char_type;
|
|
typedef base::int_type int_type;
|
|
typedef base::traits_type traits_type;
|
|
|
|
explicit test_buf(std::streambuf* sb) : base(sb) {}
|
|
|
|
char_type* eback() const {return base::eback();}
|
|
char_type* gptr() const {return base::gptr();}
|
|
char_type* egptr() const {return base::egptr();}
|
|
void gbump(int n) {base::gbump(n);}
|
|
|
|
virtual int_type underflow() {return base::underflow();}
|
|
};
|
|
|
|
int main(int, char**)
|
|
{
|
|
{
|
|
std::ifstream bs("underflow.dat");
|
|
test_buf f(bs.rdbuf());
|
|
assert(f.eback() == 0);
|
|
assert(f.gptr() == 0);
|
|
assert(f.egptr() == 0);
|
|
assert(f.underflow() == L'1');
|
|
assert(f.eback() != 0);
|
|
assert(f.eback() == f.gptr());
|
|
assert(*f.gptr() == L'1');
|
|
assert(f.egptr() - f.eback() == 9);
|
|
}
|
|
{
|
|
std::ifstream bs("underflow.dat");
|
|
test_buf f(bs.rdbuf());
|
|
assert(f.eback() == 0);
|
|
assert(f.gptr() == 0);
|
|
assert(f.egptr() == 0);
|
|
assert(f.underflow() == L'1');
|
|
assert(f.eback() != 0);
|
|
assert(f.eback() == f.gptr());
|
|
assert(*f.gptr() == L'1');
|
|
assert(f.egptr() - f.eback() == 9);
|
|
f.gbump(8);
|
|
assert(f.sgetc() == L'9');
|
|
assert(f.eback()[0] == L'1');
|
|
assert(f.eback()[1] == L'2');
|
|
assert(f.eback()[2] == L'3');
|
|
assert(f.eback()[3] == L'4');
|
|
assert(f.gptr() - f.eback() == 8);
|
|
assert(*f.gptr() == L'9');
|
|
assert(f.egptr() - f.gptr() == 1);
|
|
}
|
|
{
|
|
std::ifstream bs("underflow_utf8.dat");
|
|
test_buf f(bs.rdbuf());
|
|
assert(f.sbumpc() == 0x4E51);
|
|
assert(f.sbumpc() == 0x4E52);
|
|
assert(f.sbumpc() == 0x4E53);
|
|
assert(f.sbumpc() == test_buf::traits_type::eof());
|
|
}
|
|
|
|
return 0;
|
|
}
|