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PR libstdc++/28277 (partial: collate bits)
2006-07-11 Paolo Carlini <pcarlini@suse.de> PR libstdc++/28277 (partial: collate bits) * include/bits/locale_facets.tcc (collate<>::do_transform( const _CharT*, const _CharT*)): Avoid __builtin_alloca with no limit; also avoid multiple calls (in a loop). * testsuite/22_locale/collate/transform/char/28277.cc: New. * testsuite/22_locale/collate/transform/wchar_t/28277.cc: Likewise. From-SVN: r115332
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Paolo Carlini
Paolo Carlini
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@ -1,3 +1,12 @@
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2006-07-11 Paolo Carlini <pcarlini@suse.de>
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PR libstdc++/28277 (partial: collate bits)
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* include/bits/locale_facets.tcc (collate<>::do_transform(
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const _CharT*, const _CharT*)): Avoid __builtin_alloca with no
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limit; also avoid multiple calls (in a loop).
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* testsuite/22_locale/collate/transform/char/28277.cc: New.
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* testsuite/22_locale/collate/transform/wchar_t/28277.cc: Likewise.
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2006-07-10 Mike Stump <mrs@apple.com>
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* libsupc++/eh_globals.cc (~__eh_globals_init): Unset _M_init.
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@ -2455,43 +2455,62 @@ _GLIBCXX_END_LDBL_NAMESPACE
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collate<_CharT>::
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do_transform(const _CharT* __lo, const _CharT* __hi) const
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{
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// strxfrm assumes zero-terminated strings so we make a copy
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string_type __str(__lo, __hi);
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const _CharT* __p = __str.c_str();
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const _CharT* __pend = __str.data() + __str.length();
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size_t __len = (__hi - __lo) * 2;
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string_type __ret;
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// strxfrm stops when it sees a nul character so we break
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// the string into zero-terminated substrings and pass those
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// to strxfrm.
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for (;;)
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// Use alloca for an _M_transform temporary buffer up to an arbitrary,
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// but limited, asize, to avoid abusing the stack. Otherwise fall back
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// to dynamic memory allocation. This means splitting the computation
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// itself in hunks: a size <= 8k (thus <= 16k asize) appear sufficient
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// for optimal performance.
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const size_t __size = std::min(size_t(__hi - __lo), size_t(8192));
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const size_t __asize = 2 * __size;
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size_t __len = __asize;
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_CharT* __c =
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static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __len));
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for (size_t __hunk = __size; __lo < __hi;
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__lo += __hunk, __hunk = std::min(size_t(__hi - __lo), __hunk))
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{
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// First try a buffer perhaps big enough.
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_CharT* __c =
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static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __len));
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size_t __res = _M_transform(__c, __p, __len);
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// If the buffer was not large enough, try again with the
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// correct size.
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if (__res >= __len)
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// strxfrm assumes zero-terminated strings so we make a copy
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const string_type __str(__lo, __lo + __hunk);
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const _CharT* __p = __str.c_str();
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const _CharT* __pend = __str.data() + __hunk;
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// strxfrm stops when it sees a nul character so we break
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// the string into zero-terminated substrings and pass those
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// to strxfrm.
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for (;;)
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{
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__len = __res + 1;
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__c = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
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* __len));
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__res = _M_transform(__c, __p, __len);
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// First try a buffer perhaps big enough.
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size_t __res = _M_transform(__c, __p, __len);
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// If the buffer was not large enough, try again with the
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// correct size.
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if (__res >= __len)
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{
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if (__len > __asize)
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delete [] __c;
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__len = __res + 1;
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__c = new _CharT[__len];
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__res = _M_transform(__c, __p, __len);
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}
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__ret.append(__c, __res);
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__p += char_traits<_CharT>::length(__p);
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if (__p == __pend)
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break;
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__p++;
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__ret.push_back(_CharT());
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}
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__ret.append(__c, __res);
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__p += char_traits<_CharT>::length(__p);
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if (__p == __pend)
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return __ret;
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__p++;
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__ret.push_back(_CharT());
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}
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if (__len > __asize)
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delete [] __c;
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return __ret;
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}
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template<typename _CharT>
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@ -0,0 +1,52 @@
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// 2006-07-11 Paolo Carlini <pcarlini@suse.de>
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// Copyright (C) 2006 Free Software Foundation
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// 22.2.4.1.1 collate members
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#include <locale>
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#include <testsuite_hooks.h>
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// libstdc++/28277
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void test01()
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{
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using namespace std;
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typedef collate<char>::string_type string_type;
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bool test __attribute__((unused)) = true;
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// basic construction
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locale loc_c = locale::classic();
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// cache the collate facets
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const collate<char>& coll_c = use_facet<collate<char> >(loc_c);
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const string_type sstr(10000000, 'a');
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const string_type dstr = coll_c.transform(sstr.data(),
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sstr.data() + sstr.size());
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VERIFY( dstr == sstr );
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}
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int main()
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{
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test01();
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return 0;
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}
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@ -0,0 +1,52 @@
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// 2006-07-11 Paolo Carlini <pcarlini@suse.de>
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// Copyright (C) 2006 Free Software Foundation
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// 22.2.4.1.1 collate members
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#include <locale>
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#include <testsuite_hooks.h>
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// libstdc++/28277
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void test01()
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{
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using namespace std;
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typedef collate<wchar_t>::string_type string_type;
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bool test __attribute__((unused)) = true;
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// basic construction
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locale loc_c = locale::classic();
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// cache the collate facets
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const collate<wchar_t>& coll_c = use_facet<collate<wchar_t> >(loc_c);
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const string_type sstr(10000000, L'a');
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const string_type dstr = coll_c.transform(sstr.data(),
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sstr.data() + sstr.size());
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VERIFY( dstr == sstr );
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}
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int main()
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{
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test01();
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return 0;
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}
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