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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc | |
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Diffstat (limited to 'libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc')
-rw-r--r-- | libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc new file mode 100644 index 000000000..f6a2eaca9 --- /dev/null +++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11544-2.cc @@ -0,0 +1,184 @@ +// Copyright (C) 2003, 2009 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +// 27.8.1.4 Overridden virtual functions + +#include <fstream> +#include <locale> +#include <cstdio> +#include <testsuite_hooks.h> + +template <typename InternT, typename StateT = mbstate_t> +class checksumcvt : public std::codecvt<InternT, char, StateT> +{ + typedef std::codecvt<InternT, char, StateT> Base; + static const size_t width = sizeof(InternT) + 1; + +public: + typedef InternT intern_type; + typedef char extern_type; + + explicit checksumcvt(size_t refs = 0) + : Base(refs) + { } + +protected: + virtual typename std::codecvt<InternT, char, StateT>::result + do_out(StateT&, const intern_type* from, + const intern_type* from_end, const intern_type*& from_next, + extern_type* to, extern_type* to_end, + extern_type*& to_next) const + { + size_t len = std::min(static_cast<size_t>(from_end - from), + static_cast<size_t>(to_end - to) / width); + + while (len--) + { + const char* p = reinterpret_cast<const char*>(from); + unsigned char checksum = 0; + + for (size_t i = 0; i < sizeof(intern_type); ++i) + { + *to++ = p[i]; + checksum ^= static_cast<unsigned char>(p[i]); + } + + *to++ = checksum; + ++from; + } + + from_next = from; + to_next = to; + return from_next == from_end ? std::codecvt<InternT, char, StateT>::ok + : std::codecvt<InternT, char, StateT>::partial; + } + + virtual typename std::codecvt<InternT, char, StateT>::result + do_unshift(StateT&, extern_type* to, + extern_type*, extern_type*& to_next) const + { + to_next = to; + return std::codecvt<InternT, char, StateT>::ok; + } + + virtual typename std::codecvt<InternT, char, StateT>::result + do_in(StateT&, const extern_type* from, + const extern_type* from_end, const extern_type*& from_next, + intern_type* to, intern_type* to_end, + intern_type*& to_next) const + { + size_t len = std::min(static_cast<size_t>(to_end - to), + static_cast<size_t>(from_end - from) / width); + + while (len) + { + const char* f = from; + intern_type tmp; + char* p = reinterpret_cast<char*>(&tmp); + unsigned char checksum = 0; + + for (size_t i = 0; i < sizeof(intern_type); ++i) + { + p[i] = *f; + checksum ^= static_cast<unsigned char>(*f++); + } + + if (*f++ != checksum) + break; + + from = f; + *to++ = tmp; + len--; + } + + from_next = from; + to_next = to; + return len ? std::codecvt<InternT, char, StateT>::error : + (from_next == from_end ? std::codecvt<InternT, char, StateT>::ok + : std::codecvt<InternT, char, StateT>::partial); + } + + virtual int + do_encoding() const throw() + { return width; } + + virtual int + do_length(StateT&, const extern_type* from, + const extern_type* end, size_t max) const + { + size_t len = std::min(max, static_cast<size_t>(end - from) / width); + + int ret = 0; + while (len--) + { + unsigned char checksum = 0; + + for (size_t i = 0; i < sizeof(intern_type); ++i) + { + checksum ^= static_cast<unsigned char>(*from++); + } + + if (*from++ != checksum) + break; + + ret++; + } + + return ret; + } + + virtual int + do_max_length() const throw() + { return width; } + + virtual bool + do_always_noconv() const throw() + { return false; } +}; + +// libstdc++/11544 (invalid byte sequence in file) +void test02() +{ + using namespace std; + bool test __attribute__((unused)) = true; + + locale loc(locale::classic(), new checksumcvt<wchar_t>); + + const char* name = "tmp_11544-2"; + + FILE* f = fopen(name, "w"); + VERIFY( fwrite("aaaab", 1, 5, f) == 5 ); + fclose(f); + + wifstream in; + in.imbue(loc); + in.open(name); + + VERIFY( in.good() ); + in.get(); + VERIFY( !in.good() ); + VERIFY( in.bad() ); + VERIFY( !in.eof() ); + + in.close(); +} + +int main() +{ + test02(); + return 0; +} |