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67 lines
1.5 KiB
C++
67 lines
1.5 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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// int_type sputc(char_type c);
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#include <streambuf>
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#include <cassert>
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#include "test_macros.h"
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int overflow_called = 0;
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struct test
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: public std::basic_streambuf<char>
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{
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typedef std::basic_streambuf<char> base;
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test() {}
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void setg(char* gbeg, char* gnext, char* gend)
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{
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base::setg(gbeg, gnext, gend);
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}
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void setp(char* pbeg, char* pend)
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{
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base::setp(pbeg, pend);
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}
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protected:
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int_type overflow(int_type = traits_type::eof())
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{
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++overflow_called;
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return 'a';
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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 t;
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assert(overflow_called == 0);
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assert(t.sputc('A') == 'a');
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assert(overflow_called == 1);
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char out[3] = {0};
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t.setp(out, out+sizeof(out));
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assert(t.sputc('A') == 'A');
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assert(overflow_called == 1);
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assert(out[0] == 'A');
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assert(t.sputc('B') == 'B');
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assert(overflow_called == 1);
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assert(out[0] == 'A');
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assert(out[1] == 'B');
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}
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return 0;
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}
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