forked from mirror/libcxx
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.
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <locale>
|
|
|
|
// wbuffer_convert<Codecvt, Elem, Tr>
|
|
|
|
// pos_type seekoff(off_type off, ios_base::seekdir way,
|
|
// ios_base::openmode which = ios_base::in | ios_base::out);
|
|
// pos_type seekpos(pos_type sp,
|
|
// ios_base::openmode which = ios_base::in | ios_base::out);
|
|
|
|
// This test is not entirely portable
|
|
|
|
#include <locale>
|
|
#include <codecvt>
|
|
#include <fstream>
|
|
#include <cassert>
|
|
|
|
class test_codecvt
|
|
: public std::codecvt<wchar_t, char, std::mbstate_t>
|
|
{
|
|
typedef std::codecvt<wchar_t, char, std::mbstate_t> base;
|
|
public:
|
|
explicit test_codecvt(std::size_t refs = 0) : base(refs) {}
|
|
~test_codecvt() {}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
{
|
|
wchar_t buf[10];
|
|
typedef std::wbuffer_convert<test_codecvt> test_buf;
|
|
typedef test_buf::pos_type pos_type;
|
|
std::fstream bs("seekoff.dat", std::ios::trunc | std::ios::in
|
|
| std::ios::out);
|
|
test_buf f(bs.rdbuf());
|
|
f.pubsetbuf(buf, sizeof(buf)/sizeof(buf[0]));
|
|
f.sputn(L"abcdefghijklmnopqrstuvwxyz", 26);
|
|
assert(buf[0] == L'v');
|
|
pos_type p = f.pubseekoff(-15, std::ios_base::cur);
|
|
assert(p == 11);
|
|
assert(f.sgetc() == L'l');
|
|
f.pubseekoff(0, std::ios_base::beg);
|
|
assert(f.sgetc() == L'a');
|
|
f.pubseekoff(-1, std::ios_base::end);
|
|
assert(f.sgetc() == L'z');
|
|
assert(f.pubseekpos(p) == p);
|
|
assert(f.sgetc() == L'l');
|
|
}
|
|
std::remove("seekoff.dat");
|
|
}
|