// std::codecvt implementation details, GNU version -*- C++ -*-
-// Copyright (C) 2002 Free Software Foundation, Inc.
+// Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 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 2, or (at your option)
+// 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,
// 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 COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
//
// ISO C++ 14882: 22.2.1.5 - Template class codecvt
// Written by Benjamin Kosnik <bkoz@redhat.com>
#include <locale>
-#include "c++locale_internal.h"
+#include <cstdlib> // For MB_CUR_MAX
+#include <climits> // For MB_LEN_MAX
+#include <bits/c++locale_internal.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
-namespace std
-{
// Specializations.
-#ifdef _GLIBCPP_USE_WCHAR_T
+#ifdef _GLIBCXX_USE_WCHAR_T
codecvt_base::result
codecvt<wchar_t, char, mbstate_t>::
do_out(state_type& __state, const intern_type* __from,
extern_type* __to, extern_type* __to_end,
extern_type*& __to_next) const
{
- result __ret = error;
- size_t __len = min(__from_end - __from, __to_end - __to);
+ result __ret = ok;
+ state_type __tmp_state(__state);
+
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
- __c_locale __old = __uselocale(_S_c_locale);
+ __c_locale __old = __uselocale(_M_c_locale_codecvt);
#endif
- size_t __conv = wcsrtombs(__to, &__from, __len, &__state);
+
+ // wcsnrtombs is *very* fast but stops if encounters NUL characters:
+ // in case we fall back to wcrtomb and then continue, in a loop.
+ // NB: wcsnrtombs is a GNU extension
+ for (__from_next = __from, __to_next = __to;
+ __from_next < __from_end && __to_next < __to_end
+ && __ret == ok;)
+ {
+ const intern_type* __from_chunk_end = wmemchr(__from_next, L'\0',
+ __from_end - __from_next);
+ if (!__from_chunk_end)
+ __from_chunk_end = __from_end;
+
+ __from = __from_next;
+ const size_t __conv = wcsnrtombs(__to_next, &__from_next,
+ __from_chunk_end - __from_next,
+ __to_end - __to_next, &__state);
+ if (__conv == static_cast<size_t>(-1))
+ {
+ // In case of error, in order to stop at the exact place we
+ // have to start again from the beginning with a series of
+ // wcrtomb.
+ for (; __from < __from_next; ++__from)
+ __to_next += wcrtomb(__to_next, *__from, &__tmp_state);
+ __state = __tmp_state;
+ __ret = error;
+ }
+ else if (__from_next && __from_next < __from_chunk_end)
+ {
+ __to_next += __conv;
+ __ret = partial;
+ }
+ else
+ {
+ __from_next = __from_chunk_end;
+ __to_next += __conv;
+ }
+
+ if (__from_next < __from_end && __ret == ok)
+ {
+ extern_type __buf[MB_LEN_MAX];
+ __tmp_state = __state;
+ const size_t __conv2 = wcrtomb(__buf, *__from_next, &__tmp_state);
+ if (__conv2 > static_cast<size_t>(__to_end - __to_next))
+ __ret = partial;
+ else
+ {
+ memcpy(__to_next, __buf, __conv2);
+ __state = __tmp_state;
+ __to_next += __conv2;
+ ++__from_next;
+ }
+ }
+ }
+
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
__uselocale(__old);
#endif
- if (__conv == __len)
- {
- __from_next = __from;
- __to_next = __to + __conv;
- __ret = ok;
- }
- else if (__conv > 0 && __conv < __len)
- {
- __from_next = __from;
- __to_next = __to + __conv;
- __ret = partial;
- }
- else
- __ret = error;
-
return __ret;
}
intern_type* __to, intern_type* __to_end,
intern_type*& __to_next) const
{
- result __ret = error;
- size_t __len = min(__from_end - __from, __to_end - __to);
+ result __ret = ok;
+ state_type __tmp_state(__state);
+
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
- __c_locale __old = __uselocale(_S_c_locale);
+ __c_locale __old = __uselocale(_M_c_locale_codecvt);
#endif
- size_t __conv = mbsrtowcs(__to, &__from, __len, &__state);
+
+ // mbsnrtowcs is *very* fast but stops if encounters NUL characters:
+ // in case we store a L'\0' and then continue, in a loop.
+ // NB: mbsnrtowcs is a GNU extension
+ for (__from_next = __from, __to_next = __to;
+ __from_next < __from_end && __to_next < __to_end
+ && __ret == ok;)
+ {
+ const extern_type* __from_chunk_end;
+ __from_chunk_end = static_cast<const extern_type*>(memchr(__from_next, '\0',
+ __from_end
+ - __from_next));
+ if (!__from_chunk_end)
+ __from_chunk_end = __from_end;
+
+ __from = __from_next;
+ size_t __conv = mbsnrtowcs(__to_next, &__from_next,
+ __from_chunk_end - __from_next,
+ __to_end - __to_next, &__state);
+ if (__conv == static_cast<size_t>(-1))
+ {
+ // In case of error, in order to stop at the exact place we
+ // have to start again from the beginning with a series of
+ // mbrtowc.
+ for (;; ++__to_next, __from += __conv)
+ {
+ __conv = mbrtowc(__to_next, __from, __from_end - __from,
+ &__tmp_state);
+ if (__conv == static_cast<size_t>(-1)
+ || __conv == static_cast<size_t>(-2))
+ break;
+ }
+ __from_next = __from;
+ __state = __tmp_state;
+ __ret = error;
+ }
+ else if (__from_next && __from_next < __from_chunk_end)
+ {
+ // It is unclear what to return in this case (see DR 382).
+ __to_next += __conv;
+ __ret = partial;
+ }
+ else
+ {
+ __from_next = __from_chunk_end;
+ __to_next += __conv;
+ }
+
+ if (__from_next < __from_end && __ret == ok)
+ {
+ if (__to_next < __to_end)
+ {
+ // XXX Probably wrong for stateful encodings
+ __tmp_state = __state;
+ ++__from_next;
+ *__to_next++ = L'\0';
+ }
+ else
+ __ret = partial;
+ }
+ }
+
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
__uselocale(__old);
#endif
- if (__conv == __len)
- {
- __from_next = __from;
- __to_next = __to + __conv;
- __ret = ok;
- }
- else if (__conv > 0 && __conv < __len)
+ return __ret;
+ }
+
+ int
+ codecvt<wchar_t, char, mbstate_t>::
+ do_encoding() const throw()
+ {
+ // XXX This implementation assumes that the encoding is
+ // stateless and is either single-byte or variable-width.
+ int __ret = 0;
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __c_locale __old = __uselocale(_M_c_locale_codecvt);
+#endif
+ if (MB_CUR_MAX == 1)
+ __ret = 1;
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __uselocale(__old);
+#endif
+ return __ret;
+ }
+
+ int
+ codecvt<wchar_t, char, mbstate_t>::
+ do_max_length() const throw()
+ {
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __c_locale __old = __uselocale(_M_c_locale_codecvt);
+#endif
+ // XXX Probably wrong for stateful encodings.
+ int __ret = MB_CUR_MAX;
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __uselocale(__old);
+#endif
+ return __ret;
+ }
+
+ int
+ codecvt<wchar_t, char, mbstate_t>::
+ do_length(state_type& __state, const extern_type* __from,
+ const extern_type* __end, size_t __max) const
+ {
+ int __ret = 0;
+ state_type __tmp_state(__state);
+
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __c_locale __old = __uselocale(_M_c_locale_codecvt);
+#endif
+
+ // mbsnrtowcs is *very* fast but stops if encounters NUL characters:
+ // in case we advance past it and then continue, in a loop.
+ // NB: mbsnrtowcs is a GNU extension
+
+ // A dummy internal buffer is needed in order for mbsnrtocws to consider
+ // its fourth parameter (it wouldn't with NULL as first parameter).
+ wchar_t* __to = static_cast<wchar_t*>(__builtin_alloca(sizeof(wchar_t)
+ * __max));
+ while (__from < __end && __max)
{
- __from_next = __from;
- __to_next = __to + __conv;
- __ret = partial;
- }
- else
- __ret = error;
+ const extern_type* __from_chunk_end;
+ __from_chunk_end = static_cast<const extern_type*>(memchr(__from, '\0',
+ __end
+ - __from));
+ if (!__from_chunk_end)
+ __from_chunk_end = __end;
+
+ const extern_type* __tmp_from = __from;
+ size_t __conv = mbsnrtowcs(__to, &__from,
+ __from_chunk_end - __from,
+ __max, &__state);
+ if (__conv == static_cast<size_t>(-1))
+ {
+ // In case of error, in order to stop at the exact place we
+ // have to start again from the beginning with a series of
+ // mbrtowc.
+ for (__from = __tmp_from;; __from += __conv)
+ {
+ __conv = mbrtowc(NULL, __from, __end - __from,
+ &__tmp_state);
+ if (__conv == static_cast<size_t>(-1)
+ || __conv == static_cast<size_t>(-2))
+ break;
+ }
+ __state = __tmp_state;
+ __ret += __from - __tmp_from;
+ break;
+ }
+ if (!__from)
+ __from = __from_chunk_end;
+ __ret += __from - __tmp_from;
+ __max -= __conv;
+
+ if (__from < __end && __max)
+ {
+ // XXX Probably wrong for stateful encodings
+ __tmp_state = __state;
+ ++__from;
+ ++__ret;
+ --__max;
+ }
+ }
+
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
+ __uselocale(__old);
+#endif
+
return __ret;
}
#endif
-}
+
+_GLIBCXX_END_NAMESPACE
projects / msp430-gcc.git / blobdiff