f4c1258d56
Some embedded platforms do not wish to support the C library functionality for handling wchar_t because they have no use for it. It makes sense for libc++ to work properly on those platforms, so this commit adds a carve-out of functionality for wchar_t. Unfortunately, unlike some other carve-outs (e.g. random device), this patch touches several parts of the library. However, despite the wide impact of this patch, I still think it is important to support this configuration since it makes it much simpler to port libc++ to some embedded platforms. Differential Revision: https://reviews.llvm.org/D111265
65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <streambuf>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_streambuf;
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// void gbump(int n);
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#include <streambuf>
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#include <cassert>
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#include "test_macros.h"
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template <class CharT>
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struct test
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: public std::basic_streambuf<CharT>
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{
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typedef std::basic_streambuf<CharT> base;
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test() {}
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void setg(CharT* gbeg, CharT* gnext, CharT* gend)
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{
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base::setg(gbeg, gnext, gend);
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}
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void gbump(int n)
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{
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CharT* gbeg = base::eback();
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CharT* gnext = base::gptr();
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CharT* gend = base::egptr();
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base::gbump(n);
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assert(base::eback() == gbeg);
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assert(base::gptr() == gnext+n);
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assert(base::egptr() == gend);
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}
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};
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int main(int, char**)
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{
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{
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test<char> t;
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char in[] = "ABCDE";
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t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
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t.gbump(2);
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}
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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{
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test<wchar_t> t;
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wchar_t in[] = L"ABCDE";
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t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
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t.gbump(3);
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}
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#endif
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return 0;
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}
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