| /*************************************************************************** |
| * |
| * locale_body.cpp - implementation of the std::locale and __rw_locale class |
| * |
| * This is an internal header file used to implement the C++ Standard |
| * Library. It should never be #included directly by a program. |
| * |
| * $Id$ |
| * |
| *************************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed |
| * with this work for additional information regarding copyright |
| * ownership. The ASF licenses this file to you under the Apache |
| * License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| * |
| * Copyright 2001-2008 Rogue Wave Software, Inc. |
| * |
| **************************************************************************/ |
| |
| #define _RWSTD_LIB_SRC |
| |
| #include <rw/_defs.h> |
| |
| #include <new> // for placement new |
| #include <locale.h> |
| #include <stdio.h> |
| #include <stdlib.h> // for bsearch(), qsort() |
| #include <string.h> // for memxxx() and strxxx() functions |
| |
| #include <loc/_locale.h> |
| |
| #include "access.h" |
| #include "locale_body.h" |
| #include "setlocale.h" |
| |
| |
| #ifdef _RWSTD_NO_LOCALE_NAME_FMAT |
| |
| // pick an arbitrary order for categories in locale names |
| # define _RWSTD_CAT_0(pfx) \ |
| { _RWSTD_LC_CTYPE, "LC_CTYPE", pfx::_C_ctype } |
| # define _RWSTD_CAT_1(pfx) \ |
| { _RWSTD_LC_NUMERIC, "LC_NUMERIC", pfx::_C_numeric } |
| # define _RWSTD_CAT_2(pfx) \ |
| { _RWSTD_LC_TIME, "LC_TIME", pfx::_C_time } |
| # define _RWSTD_CAT_3(pfx) \ |
| { _RWSTD_LC_COLLATE, "LC_COLLATE", pfx::_C_collate } |
| # define _RWSTD_CAT_4(pfx) \ |
| { _RWSTD_LC_MONETARY, "LC_MONETARY", pfx::_C_monetary } |
| # define _RWSTD_CAT_5(pfx) \ |
| { _RWSTD_LC_MESSAGES, "LC_MESSAGES", pfx::_C_messages } |
| |
| #endif // _RWSTD_NO_LOCALE_NAME_FMAT |
| |
| |
| #if 6 == _RWSTD_HP_aCC_MAJOR && _RWSTD_HP_aCC_MINOR <= 1600 |
| // silence bogus HP aCC 6.16/cadvise warning #20200-D: |
| // Potential null pointer dereference |
| # pragma diag_suppress 20200 |
| #endif |
| |
| |
| _RWSTD_NAMESPACE (__rw) { |
| |
| |
| // maps LC_XXX category values to their names |
| extern const __rw_cats_t |
| __rw_cats [] = { |
| |
| // expands to { LC_XXX, "LC_XXX", _RW::__rw_locale::_C_xxx } |
| // the order of these is determined at config time and corresponds to |
| // the order mixed/combined locale categories returned by setlocale() |
| _RWSTD_CAT_0 (_RW::__rw_locale), |
| _RWSTD_CAT_1 (_RW::__rw_locale), |
| _RWSTD_CAT_2 (_RW::__rw_locale), |
| _RWSTD_CAT_3 (_RW::__rw_locale), |
| _RWSTD_CAT_4 (_RW::__rw_locale), |
| |
| #ifdef _RWSTD_CAT_5 |
| _RWSTD_CAT_5 (_RW::__rw_locale) |
| #else // if !defined (_RWSTD_CAT_5) |
| // for Windoze (no LC_MESSAGES there) |
| _RWSTD_CAT_0 (_RW::__rw_locale) |
| #endif // _RWSTD_CAT_5 |
| |
| }; |
| |
| |
| // fills provided buffer (if large anough) with the names of locales |
| // for each of the standard LC_XXX categories; if all categories come |
| // from the same locale, copies the name of the common locale into |
| // the provided buffer |
| // |
| // names of categories are in the following order: |
| // LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME, LC_MESSAGES |
| // |
| // examples of output (assuming ';' as a separator): |
| // "C" |
| // all facets of all categories come from the "C" locale |
| // |
| // "C;C;de_DE;C;C;C;" |
| // all facets come from the "C" locale except those that belong |
| // to the LC_MONETARY category, which all come from "de_DE" |
| // |
| // "C;en_US;*;*;*;*;" |
| // facets the belong to the LC_COLLATE category come from the |
| // "C" locale, those belonging to the LC_CTYPE category come |
| // from "en_US", all others are from mixed locales within |
| // their respective categories |
| // |
| // "*" |
| // facets belonging to each category come from all different |
| // locales (e.g., ctype<char> might come from the "C" locale, |
| // and ctype<wchar_t> from "ja_JP", etc.) |
| |
| char* __rw_locale:: |
| _C_get_cat_names (char *buf, size_t bufsize) const |
| { |
| const size_t savesize = bufsize; |
| char *savebuf = buf; |
| |
| if (!buf) |
| buf = new char [bufsize ? bufsize : (bufsize = 256)]; |
| |
| *buf = '\0'; |
| |
| // will point at the locale name common across all categories |
| // if one such name exists; otherwise at "*" (mixed locale) |
| const char *common_name = 0; |
| |
| // iterate over all categories, searching for all facets that belong |
| // to that category and comparing their names. if all such facets come |
| // from the same locale, the name of the category is the name of the |
| // locale; otherwise "*" |
| for (size_t i = 0; i != __rw_n_cats; ++i) { |
| |
| const char *cat_name = 0; |
| |
| for (size_t j = 0; j != _C_n_std_facets; ++j) { |
| |
| // verify that all facet pointers are set |
| _RWSTD_ASSERT (_C_std_facets [j]); |
| |
| // ignore the non-localized {money,num}_{get,put} facets |
| // and consider only moneypunct and numpunct for the |
| // monetary category |
| switch (_C_std_facets [j]->_C_type) { |
| case __rw_facet::_C_num_get: |
| case __rw_facet::_C_wnum_get: |
| case __rw_facet::_C_num_put: |
| case __rw_facet::_C_wnum_put: |
| case __rw_facet::_C_money_get: |
| case __rw_facet::_C_wmoney_get: |
| case __rw_facet::_C_money_put: |
| case __rw_facet::_C_wmoney_put: |
| continue; |
| default: |
| break; |
| } |
| |
| _RWSTD_ASSERT (0 != _C_std_facets [j]->_C_pid); |
| |
| // one category at a time |
| if ( __rw_cats [i].cat |
| != __rw_get_cat (int (*_C_std_facets [j]->_C_pid))) |
| continue; |
| |
| // default facet name (if 0) is "C" |
| const char *facet_name = _C_std_facets [j]->_C_name |
| ? _C_std_facets [j]->_C_name : "C"; |
| |
| if (cat_name && strcmp (cat_name, facet_name)) |
| cat_name = "*"; |
| else |
| cat_name = facet_name; |
| |
| if (common_name) { |
| // if the name of the locale for this category doesn't |
| // match the common locale name so far, assign "*" |
| if (strcmp (common_name, cat_name)) |
| common_name = "*"; |
| } |
| else |
| common_name = cat_name; |
| } |
| |
| // will be 0 iff all facets in a category are 0 |
| // (i.e., an internal logic error) |
| _RWSTD_ASSERT (cat_name); |
| |
| if ( strlen (buf) + strlen (cat_name) + 2 |
| >= bufsize) { |
| // reallocate buffer if necessary |
| char *tmp = 0; |
| |
| _TRY { |
| tmp = new char [bufsize *= 2]; |
| } |
| _CATCH (...) { |
| if (buf != savebuf) |
| delete[] buf; |
| _RETHROW; |
| } |
| |
| strcpy (tmp, buf); |
| if (buf != savebuf) |
| delete[] buf; |
| buf = tmp; |
| } |
| |
| strcat (buf, cat_name); |
| strcat (buf, _RWSTD_CAT_SEP); |
| } |
| |
| _RWSTD_ASSERT (common_name); |
| |
| if (__rw_facet::_C_opts & __rw_facet::_C_condensed_name) { |
| // if all categories come from the same locale, copy the name |
| // of that locale into the buffer |
| if ('*' != common_name [0] || '\0' != common_name [1]) { |
| if ( savebuf && buf != savebuf |
| && savesize >= strlen (common_name)) { |
| // delete allocated memory and repoint at original buffer |
| delete[] buf; |
| buf = savebuf; |
| } |
| strcpy (buf, common_name); |
| } |
| } |
| |
| // remove trailing separator |
| const size_t len = strlen (buf); |
| if (len && *_RWSTD_CAT_SEP == buf [len - 1]) |
| buf [len - 1] = '\0'; |
| |
| return buf; |
| } |
| |
| |
| // returns a pointer to a character array containing locale names separated |
| // by _RWSTD_CAT_SEP corresponding to the named locale (typically all the |
| // names will be the same except possibly for the native locale which can |
| // consist of facets from different named locales specified by the LC_XXX |
| // environment variables) |
| static const char* |
| __rw_expand_name (__rw_chararray &namebuf, const char *name) |
| { |
| const char *sep = strchr (name, *_RWSTD_CAT_SEP); |
| |
| if (sep == name) { |
| // skip the first separator if it's at the beginning of `name' |
| // (e.g., SunOS locale names have the format "/en/C/ja/C/it/de") |
| sep = strchr (++name, *_RWSTD_CAT_SEP); |
| } |
| |
| // true if all ctaegories are from the same locale, false otherwise |
| bool same_cats = true; |
| |
| if (sep) { |
| |
| // `name' contains a locale category separator; iterate over |
| // all locale categories to determine the name of the locale |
| // for each one of them |
| |
| for (size_t i = 0; ; sep = strchr (name, *_RWSTD_CAT_SEP)) { |
| |
| if (!sep) |
| sep = name + strlen (name); |
| |
| const size_t catlen = sep - name; |
| |
| // copy the read-only substring forming a locale name |
| // into a writeable buffer so that it can be NUL-terminated |
| const __rw_chararray shortname (name, catlen); |
| |
| __rw_chararray longname; |
| |
| // convert the (possibly abbreviated) name or a locale alias |
| // into the full name uniquely identifying the locale (e.g., |
| // all of "de," "de_DE," and "german" can expand into the |
| // full canonical name "de_DE.ISO-8869-1"; this is necessary |
| // to guarantee that the internal locale repository doesn't |
| // contain duplicate entries) |
| const char* const fullname = |
| __rw_locale_name (__rw_cats [i].cat, shortname.data (), |
| longname); |
| |
| if (!fullname) |
| return 0; |
| |
| const size_t namelen = strlen (fullname); |
| |
| _RWSTD_ASSERT (0 != namelen); |
| |
| // determine if the new category name is the same as the first |
| // one (if it is, it is also the same as all subsequent ones, |
| // otherwise `same_cats' is already set to false) |
| if (same_cats && i) |
| same_cats = !memcmp (namebuf.data (), fullname, namelen) |
| && *_RWSTD_CAT_SEP == namebuf.data () [namelen]; |
| |
| namebuf.append (fullname, namelen); |
| |
| if (++i == __rw_n_cats || !*sep) |
| break; |
| |
| namebuf.append (_RWSTD_CAT_SEP, 1); |
| |
| name = sep + 1; |
| } |
| } |
| else if ('\0' == *name) { |
| |
| // no separator found, set all categories |
| const __rw_setlocale loc (name, _RWSTD_LC_ALL, 1 /* nothrow */); |
| |
| if (!loc.name ()) |
| return 0; |
| |
| // compose a string of category names separated by CAT_SEP |
| for (size_t i = 0; ; ) { |
| |
| // retrieve the name of each idividual category |
| const char* const fullname = setlocale (__rw_cats [i].cat, 0); |
| |
| // call to setlocale() must succeed if `loc' succeeded |
| _RWSTD_ASSERT (0 != fullname); |
| |
| const size_t namelen = strlen (fullname); |
| |
| if (same_cats && i) |
| same_cats = !memcmp (namebuf.data (), fullname, namelen) |
| && *_RWSTD_CAT_SEP == namebuf.data () [namelen]; |
| |
| namebuf.append (fullname, namelen); |
| |
| if (++i == __rw_n_cats) |
| break; |
| |
| namebuf.append (_RWSTD_CAT_SEP, 1); |
| } |
| } |
| |
| if (*namebuf.data ()) { |
| |
| if (same_cats && __rw_facet::_C_opts & __rw_facet::_C_condensed_name) { |
| |
| // all categories were the same, store just the first one |
| |
| char* const data = namebuf.data (); |
| const size_t sepinx = strchr (data, *_RWSTD_CAT_SEP) - data; |
| |
| // NUL-terminate at the first separator |
| namebuf.acquire (data, sepinx); |
| namebuf.append ("", 1); |
| } |
| } |
| else { |
| |
| const char* const fullname = |
| __rw_locale_name (_RWSTD_LC_ALL, name, namebuf); |
| |
| if (!fullname) |
| return 0; |
| } |
| |
| return namebuf.data (); |
| |
| |
| #if 0 |
| |
| // points to the next category name |
| const char *next = strchr (name, *_RWSTD_CAT_SEP); |
| |
| if (next && *next) { |
| |
| // save the end of the first name to detect combined locale |
| // names composed of categories referring to the same locale |
| char *first_end = bufbeg; |
| |
| // name is a string of locale category names; compose |
| // an equivalent string obtained by concatenating the |
| // results of calling setlocale() on each |
| // substring |
| |
| const char *ps = name; |
| |
| size_t __i = 0; |
| do { |
| if (!next) |
| next = ps + strlen (ps); |
| |
| memcpy (pbuf, ps, next - ps); |
| pbuf [next - ps] = '\0'; |
| |
| if (__i < __rw_n_cats) { |
| |
| const int cat = __rw_cats [__i++].cat; |
| |
| // get the actual locale name for each category |
| // and append it to the end of the name buffer |
| if (!__rw_locale_name (cat, pbuf, pbuf, pbuf - bufbeg)) |
| return 0; // name not recognized |
| } |
| |
| const size_t len = strlen (pbuf); |
| |
| if (first_end == bufbeg) |
| first_end = pbuf + len; |
| else if ( first_end |
| && ( size_t (first_end - bufbeg) != len |
| || memcmp (bufbeg, pbuf, len))) { |
| // category name differs from the first (i.e., category |
| // names will be cobined) no need to check further |
| first_end = 0; |
| } |
| |
| // advance to the next name |
| pbuf += len; |
| *pbuf++ = *_RWSTD_CAT_SEP; |
| |
| // reached the end of the (not `sep'-terminated) list |
| if ('\0' == *next) |
| break; |
| |
| ps = next + 1; |
| next = strchr (ps, *_RWSTD_CAT_SEP); |
| } while (*ps); |
| |
| *pbuf = '\0'; |
| |
| // assume the native locale for all missing categories |
| while (__i < __rw_n_cats) { |
| |
| const int cat = __rw_cats [__i++].cat; |
| |
| const __rw_setlocale loc ("", cat, 1 /* nothrow */); |
| |
| if (!loc.name ()) |
| return 0; |
| |
| const char* catname = setlocale (cat, 0); |
| |
| _RWSTD_ASSERT (0 != catname); |
| |
| strcat (pbuf, catname); |
| |
| // compare the category name with the first one and remember |
| // if they differ (to detect all the same category names) |
| if (first_end && memcmp (bufbeg, name, first_end - name)) |
| first_end = 0; |
| |
| pbuf += strlen (pbuf); |
| *pbuf++ = *_RWSTD_CAT_SEP; |
| } |
| |
| // remove the last separator |
| if (pbuf [-1] == *_RWSTD_CAT_SEP) |
| pbuf [-1] = '\0'; |
| |
| // if non-0, all categories come from the same locale |
| // keep the first name and chop off the rest |
| if ( __rw_facet::_C_opts & __rw_facet::_C_condensed_name |
| && first_end) |
| bufbeg [first_end - bufbeg] = '\0'; |
| } |
| else { |
| // all categories have the same name in named locales |
| |
| name = __rw_locale_name (_RWSTD_LC_ALL, name, bufbeg, bufsize); |
| if (!name) |
| return 0; |
| } |
| } |
| |
| return bufbeg; |
| |
| #endif |
| } |
| |
| |
| size_t __rw_locale:: |
| _C_get_facet_inx (size_t id) const _THROWS (()) |
| { |
| // verify that facet's id is initialized |
| _RWSTD_ASSERT (id); |
| |
| // standard facet's id are one greater than their index |
| if (id <= _C_n_std_facets) |
| return id - 1; |
| |
| _RWSTD_ASSERT (!_C_n_usr_facets || _C_usr_facets); |
| |
| // linear search through user-defined facets (if any) |
| for (size_t i = 0; i != _C_n_usr_facets; ++i) { |
| |
| _RWSTD_ASSERT (_C_usr_facets [i]->_C_pid); |
| |
| if (*_C_usr_facets [i]->_C_pid == id) |
| return i + _C_n_std_facets; |
| } |
| |
| return _RWSTD_SIZE_MAX; |
| } |
| |
| |
| __rw_locale:: |
| __rw_locale (const char *name) |
| : _C_usr_facets (0), _C_n_usr_facets (0), _C_ref (1), |
| _C_std_facet_bits (0), _C_byname_facet_bits (0) |
| { |
| _RWSTD_ASSERT (name); |
| |
| // verify that name doesn't refer to an unnamed (combined) locale |
| _RWSTD_ASSERT (!strchr (name, '*')); |
| |
| if ('\0' == *name) { |
| |
| __rw_chararray fullname; |
| fullname.acquire (_C_namebuf, 0); |
| |
| // get the names of locales for all standard categories |
| // avoiding dynamic memory allocation if possible |
| _C_name = __rw_expand_name (fullname, name); |
| |
| fullname.release (); |
| |
| // caller must guarantee that `name' is valid |
| _RWSTD_ASSERT (0 != _C_name); |
| |
| // note that `name' may not be the same as `_C_name' at this point |
| } |
| else { |
| const size_t namelen = strlen (name) + 1; |
| |
| // assume name is well-formed and valid (checked by caller) |
| char* const tmp = namelen < sizeof _C_namebuf |
| ? _C_namebuf : new char [namelen]; |
| |
| memcpy (tmp, name, namelen); |
| |
| _C_name = tmp; |
| } |
| |
| // all facets are standard |
| _C_std_facet_bits = _C_all; |
| |
| // byname facets determined below |
| _C_byname_facet_bits = 0; |
| |
| if (strchr (_C_name, *_RWSTD_CAT_SEP)) { |
| |
| // name consist of multiple locale names; iterate over them all |
| // setting byname facet bits for each named category |
| size_t inx = 0; |
| |
| for (const char *nm = _C_name; *nm && inx != __rw_n_cats; ++nm) { |
| |
| if ('C' != nm [0] || *_RWSTD_CAT_SEP != nm [1]) |
| _C_byname_facet_bits |= __rw_cats [inx].facet_bits; |
| |
| nm = strchr (nm, *_RWSTD_CAT_SEP); |
| if (!nm) |
| break; |
| |
| ++inx; |
| } |
| } |
| else { |
| // all facets (except for num_{get,put}) are byname in non-C locales |
| if (!__rw_is_C (_C_name)) |
| _C_byname_facet_bits = _C_all; |
| } |
| |
| #if defined (__i386__) || !defined (__GNUG__) || __GNUG__ < 3 |
| |
| memset (_C_std_facets, 0, sizeof _C_std_facets); |
| |
| #else // !i86 || !gcc 3.x |
| |
| // Working around a gcc 3.1 optimizer bug on SPARC (and possibly |
| // other RISC architectures) where, when generating PIC, _C_std_facets |
| // ends up being 4-byte aligned and gcc replaces memset() with a series |
| // of std %o1, [_C_std_facets + i] instructions with %o1 being 0 and i |
| // being 0, 8, 16, etc. and std operating on 64-bit double words. The |
| // first such misaligned std operation causes a SIGBUS |
| |
| for (size_t i = 0; i != _C_n_std_facets; ++i) |
| _C_std_facets [i] = 0; |
| |
| #endif // i86/gcc 3.x |
| |
| } |
| |
| |
| // convert a LC_XXX constant to a locale::category value |
| /* static */ int __rw_locale:: |
| _C_LC2category (int cat) _THROWS (()) |
| { |
| switch (cat) { |
| case _RWSTD_LC_ALL: cat = __rw_cat_all; break; |
| case _RWSTD_LC_COLLATE: cat = __rw_cat_collate; break; |
| case _RWSTD_LC_CTYPE: cat = __rw_cat_ctype; break; |
| case _RWSTD_LC_MONETARY: cat = __rw_cat_monetary; break; |
| case _RWSTD_LC_NUMERIC: cat = __rw_cat_numeric; break; |
| case _RWSTD_LC_TIME: cat = __rw_cat_time; break; |
| #ifdef _RWSTD_LC_MESSAGES |
| case _RWSTD_LC_MESSAGES: cat = __rw_cat_messages; break; |
| #endif |
| |
| default: |
| // assume `cat' is already a locale::category value |
| break; |
| } |
| return cat; |
| } |
| |
| |
| // convert a LC_XXX constant to an internal bitset of facets |
| /* static */ int __rw_locale:: |
| _C_LC2facet_bits (int cat) _THROWS (()) |
| { |
| int bits; |
| |
| switch (cat) { |
| case _RWSTD_LC_ALL: bits = __rw_locale::_C_all; break; |
| case _RWSTD_LC_COLLATE: bits = __rw_locale::_C_collate; break; |
| case _RWSTD_LC_CTYPE: bits = __rw_locale::_C_ctype; break; |
| case _RWSTD_LC_MONETARY: bits = __rw_locale::_C_monetary; break; |
| case _RWSTD_LC_NUMERIC: bits = __rw_locale::_C_numeric; break; |
| case _RWSTD_LC_TIME: bits = __rw_locale::_C_time; break; |
| #ifdef _RWSTD_LC_MESSAGES |
| case _RWSTD_LC_MESSAGES: bits = __rw_locale::_C_messages; break; |
| #endif |
| |
| default: { |
| |
| // assume `cat' is a locale::category value |
| bits = 0; |
| |
| if (cat & __rw_cat_collate) |
| bits |= _RW::__rw_locale::_C_collate; |
| if (cat & __rw_cat_ctype) |
| bits |= _RW::__rw_locale::_C_ctype; |
| if (cat & __rw_cat_monetary) |
| bits |= _RW::__rw_locale::_C_monetary; |
| if (cat & __rw_cat_numeric) |
| bits |= _RW::__rw_locale::_C_numeric; |
| if (cat & __rw_cat_time) |
| bits |= _RW::__rw_locale::_C_time; |
| if (cat & __rw_cat_messages) |
| bits |= _RW::__rw_locale::_C_messages; |
| break; |
| } |
| |
| } |
| return bits; |
| } |
| |
| |
| __rw_locale:: |
| ~__rw_locale () _THROWS (()) |
| { |
| // verify that object isn't being destroyed prematurely |
| _RWSTD_ASSERT (0 == _C_ref); |
| |
| if (_C_name != _C_namebuf) |
| delete[] _RWSTD_CONST_CAST (char*, _C_name); |
| |
| // decrement the reference count of each installed facet |
| // and delete each facet whose refcount drops to zero |
| for (size_t i = 0; i != _C_n_std_facets; ++i) { |
| |
| if (!_C_std_facets [i]) |
| continue; |
| |
| _RWSTD_ASSERT (_C_std_facets [i]->_C_type != __rw_facet::_C_invalid); |
| |
| if (_C_std_facets [i]->_C_type) { |
| |
| // only standard facets (non-zero type) are managed |
| // decrement the facet's reference count and remove |
| // it from the global repository if it is 0 |
| const __rw_facet* const pfacet = |
| __rw_facet::_C_manage (_C_std_facets [i], |
| _C_std_facets [i]->_C_type, |
| _C_std_facets [i]->_C_name, |
| 0); |
| |
| // verify that facet has been disposed of |
| _RWSTD_ASSERT (0 == pfacet); |
| _RWSTD_UNUSED (pfacet); |
| } |
| else { |
| // decrement ref count (must not drop below 0) |
| const size_t ref = _C_remove_ref (*_C_std_facets [i]); |
| |
| _RWSTD_ASSERT (ref + 1U != 0); |
| |
| if (0 == ref) |
| delete _C_std_facets [i]; |
| } |
| } |
| |
| // verify that either both are 0 or neither is 0 |
| _RWSTD_ASSERT (!_C_n_usr_facets == !_C_usr_facets); |
| |
| // decrement ref counts of user-defined facets and delete if necessary |
| for (size_t j = 0; j != _C_n_usr_facets; ++j) { |
| |
| _RWSTD_ASSERT (_C_usr_facets [j]); |
| |
| _RWSTD_ASSERT (_C_usr_facets [j]->_C_type != __rw_facet::_C_invalid); |
| |
| // decrement ref count (must not drop below 0) |
| const size_t ref = _C_remove_ref (*_C_usr_facets [j]); |
| |
| _RWSTD_ASSERT (ref + 1U != 0); |
| |
| if (0 == ref) |
| delete _C_usr_facets [j]; |
| } |
| |
| delete[] _C_usr_facets; |
| } |
| |
| |
| extern "C" { |
| |
| // compares two locales, returns 0 if equal, -1 if less, +1 otherwise |
| static int |
| cmplocales (const void *pv1, const void *pv2) _THROWS (()) |
| { |
| _RWSTD_ASSERT (0 != pv1); |
| _RWSTD_ASSERT (0 != pv2); |
| |
| const __rw_locale* const pl1 = |
| *_RWSTD_STATIC_CAST (const __rw_locale* const*, pv1); |
| const __rw_locale* const pl2 = |
| *_RWSTD_STATIC_CAST (const __rw_locale* const*, pv2); |
| |
| _RWSTD_ASSERT (0 != pl1->_C_get_name ()); |
| _RWSTD_ASSERT (0 != pl1->_C_get_name ()); |
| |
| return strcmp (pl1->_C_get_name (), pl2->_C_get_name ()); |
| } |
| |
| |
| // compares a key to a locale, returns 0 if equal, -1 if less, +1 otherwise |
| static int |
| cmplocale (const void *pv1, const void *pv2) _THROWS (()) |
| { |
| _RWSTD_ASSERT (0 != pv1); |
| _RWSTD_ASSERT (0 != pv2); |
| |
| const char* const nm1 = _RWSTD_STATIC_CAST (const char*, pv1); |
| |
| const __rw_locale* const plocale = |
| *_RWSTD_STATIC_CAST (const __rw_locale* const*, pv2); |
| |
| _RWSTD_ASSERT (0 != nm1); |
| _RWSTD_ASSERT (0 != plocale->_C_get_name ()); |
| |
| return strcmp (nm1, plocale->_C_get_name ()); |
| } |
| |
| } // extern "C" |
| |
| |
| // manages a global, per-process repository of locale bodies according |
| // to the following table: |
| |
| // plocale locname algorithm |
| // 0 0 retrieve the global locale |
| // 0 non-0 find named locale in repository and increment |
| // its ref count if found, or construct it with |
| // ref count of 1 and add it otherwise |
| // non-0 0 make `plocale' the new global locale and |
| // return the previous global locale |
| // non-0 non-0 find locale in repository, decrement its ref |
| // count, and remove it if the ref count is 0 |
| |
| /* static */ __rw_locale* |
| __rw_locale:: |
| _C_manage (__rw_locale *plocale, const char *locname) |
| { |
| // a per-process array of locale body pointers |
| static __rw_locale* locale_buf [8]; |
| static __rw_locale** locales = locale_buf; |
| static __rw_locale* classic = 0; |
| static size_t n_locales = 0; |
| static size_t locale_bufsize = |
| sizeof locale_buf / sizeof *locale_buf; |
| |
| if (!locname) { |
| |
| // manage the global locale |
| |
| static __rw_locale* global = 0; |
| |
| if (!global) { |
| |
| // volatile to prevent optimizers from turning |
| // the while statement below into an infinite loop |
| static volatile int ginit /* = 0 */; |
| |
| // cast ginit to int& (STDCXX-792) |
| // casting should be removed after fixing STDCXX-794 |
| if (!ginit && 1 == _RWSTD_ATOMIC_PREINCREMENT ( |
| _RWSTD_CONST_CAST (int&, ginit), false)) { |
| global = _C_manage (0, "C"); |
| ginit += 1000; |
| } |
| else { |
| // ginit must be volatile to prevent optimizers |
| // from turning this into an infinite loop |
| while (ginit < 1000) { /* empty */ } |
| } |
| } |
| |
| // re-entrant |
| _RWSTD_MT_STATIC_GUARD (_RW::__rw_locale); |
| |
| __rw_locale* const tmp = global; |
| |
| _RWSTD_ASSERT (0 != tmp); |
| |
| if (plocale) { |
| // replace the global locale with `plocale' |
| |
| // increment the future global locale's ref count first |
| _RWSTD_ATOMIC_PREINCREMENT (plocale->_C_ref, false); |
| |
| // and then set the global locale |
| global = plocale; |
| } |
| else { |
| |
| // retrieve the global locale |
| |
| // always increment a ref count, even if `global' is being set |
| // (and its ref count is > 0), to prevent its ref count from |
| // dropping to 0 |
| _RWSTD_ATOMIC_PREINCREMENT (tmp->_C_ref, false); |
| } |
| |
| return tmp; |
| } |
| |
| if (plocale && plocale == classic) { |
| // optimize the "destruction" of the classic C locale |
| // the object is never destroyed and its reference count |
| // never drops to 0 |
| _RWSTD_ASSERT (__rw_is_C (locname)); |
| _RWSTD_ASSERT (__rw_is_C (plocale->_C_name)); |
| |
| const size_t ref = |
| _RWSTD_ATOMIC_PREDECREMENT (plocale->_C_ref, false); |
| |
| _RWSTD_ASSERT (ref + 1U != 0); |
| _RWSTD_UNUSED (ref); |
| |
| return 0; |
| } |
| |
| // re-entrant to protect static local data structures |
| // (not the locales themselves) |
| _RWSTD_MT_STATIC_GUARD (_RW::__rw_locale); |
| |
| // determine whether `locname' refers to the classic C locale |
| // (e.g., it could be any of "C", "POSIX", "C C C C C C", etc.) |
| bool is_C_locale = __rw_is_C (locname); |
| |
| // substitute the fully expanded libc name for the classic C locale, |
| // i.e., the result of calling std::setlocale ("C") |
| if (is_C_locale) |
| locname = __rw_C_locale_name; |
| |
| __rw_chararray fullname; |
| |
| if (!plocale && !is_C_locale) { |
| // to avoid unnecessary calls to setlocale() only get cat names |
| // when composing a locale name, otherwise the locale name is |
| // assumed to be correct and complete |
| locname = __rw_expand_name (fullname, locname); |
| |
| if (!locname) |
| return 0; // program error |
| |
| is_C_locale = __rw_is_C (locname); |
| |
| if (is_C_locale) |
| locname = __rw_C_locale_name; |
| } |
| |
| if (plocale) { |
| // remove locale from the locale repository (if it is found) and |
| // destroy it (the classic C locale is never destroyed) |
| |
| _RWSTD_ASSERT (0 != n_locales); |
| |
| const void* const pl = |
| bsearch (locname, locales, n_locales, sizeof *locales, &cmplocale); |
| if (pl) { |
| |
| const size_t inx = |
| _RWSTD_STATIC_CAST (const __rw_locale* const*, pl) |
| - _RWSTD_CONST_CAST (const __rw_locale* const*, locales); |
| |
| plocale = locales [inx]; |
| |
| const size_t ref = |
| _RWSTD_ATOMIC_PREDECREMENT (plocale->_C_ref, false); |
| |
| _RWSTD_ASSERT (_RWSTD_SIZE_MAX != ref); |
| |
| if (0 == ref) { |
| |
| static const size_t bufsize = |
| sizeof locale_buf / sizeof *locale_buf; |
| |
| --n_locales; |
| |
| if (n_locales < bufsize / 2 && locales != locale_buf) { |
| |
| _RWSTD_ASSERT (inx < bufsize); |
| |
| // when the number of locales in the dynamically |
| // allocated repository drops below half the capacity |
| // of the statically allocated buffer, copy locales |
| // from the former into the latter and deallocate the |
| // former |
| memcpy (locale_buf, locales, inx * sizeof (*locales)); |
| |
| memcpy (locale_buf + inx, locales + inx + 1, |
| (n_locales - inx) * sizeof (*locales)); |
| |
| delete[] locales; |
| |
| // point at the statically allocated buffer and reset |
| // the current capacity to the original capacity |
| locales = locale_buf; |
| locale_bufsize = bufsize; |
| } |
| else { |
| // move facet pointers back |
| memmove (locales + inx, locales + inx + 1, |
| (n_locales - inx) * sizeof (*locales)); |
| } |
| |
| _RWSTD_ASSERT (0 != plocale->_C_name); |
| |
| // only named locales (i.e., other than the C locale) |
| // are deleted |
| if (!__rw_is_C (plocale->_C_name)) |
| delete plocale; |
| } |
| } |
| else { |
| |
| // object is the classic C locale which is never destroyed |
| _RWSTD_ASSERT (plocale->_C_name); |
| _RWSTD_ASSERT (__rw_is_C (plocale->_C_name)); |
| |
| const size_t ref = |
| _RWSTD_ATOMIC_PREDECREMENT (plocale->_C_ref, false); |
| |
| _RWSTD_ASSERT (ref + 1U != 0); |
| _RWSTD_UNUSED (ref); |
| } |
| |
| plocale = 0; |
| } |
| else { |
| |
| // find locale in the repository or construct it if not found |
| |
| const void* const pcl = |
| bsearch (locname, locales, n_locales, sizeof *locales, &cmplocale); |
| |
| if (pcl) { |
| // facet already exists in the repository, bump up its ref count |
| |
| void* const pl = _RWSTD_CONST_CAST (void*, pcl); |
| |
| plocale = *_RWSTD_STATIC_CAST (__rw_locale**, pl); |
| |
| _RWSTD_ASSERT (0 != plocale); |
| |
| _RWSTD_ATOMIC_PREINCREMENT (plocale->_C_ref, false); |
| } |
| else { |
| |
| if (n_locales == locale_bufsize) { |
| |
| // reallocate buffer of facet pointers |
| __rw_locale** const tmp = |
| new __rw_locale* [n_locales * 2]; |
| |
| memcpy (tmp, locales, n_locales * sizeof *tmp); |
| |
| if (locales != locale_buf) |
| delete[] locales; |
| |
| locales = tmp; |
| locale_bufsize *= 2; |
| } |
| |
| if (__rw_is_C (locname)) { |
| |
| if (!classic) { |
| |
| // the classic C locale is statically allocated |
| // and not destroyed during the lifetime of the process |
| static __rw_aligned_buffer<__rw_locale> classic_body; |
| |
| // construct a locale body in place |
| // with the initial reference count of 1 |
| classic = new (classic_body._C_store ()) |
| __rw_locale (locname); |
| |
| _RWSTD_ASSERT (1 == classic->_C_ref); |
| } |
| else { |
| _RWSTD_ASSERT (0 != classic); |
| |
| _RWSTD_ATOMIC_PREINCREMENT (classic->_C_ref, false); |
| } |
| |
| plocale = classic; |
| } |
| else { |
| plocale = new __rw_locale (locname); |
| |
| _RWSTD_ASSERT (1 == plocale->_C_ref); |
| } |
| |
| _RWSTD_ASSERT (plocale); |
| |
| // add locale body pointer to the end of the repository |
| locales [n_locales++] = plocale; |
| |
| // sort pointers for fast access |
| qsort (locales, n_locales, sizeof *locales, &cmplocales); |
| } |
| } |
| |
| return plocale; |
| } |
| |
| |
| // returns true iff all the facets in the given locale category |
| // installed in `*this' are being globally managed by the library |
| // if (cat == locale::none) holds, returns true iff the entire |
| // locale body is being managed |
| bool __rw_locale:: |
| _C_is_managed (int cat) const _THROWS (()) |
| { |
| // `cat' must be a valid category |
| _RWSTD_ASSERT (_C_check_category (_C_LC2category (cat))); |
| |
| if (cat == __rw_cat_none) { |
| |
| // locales containing any user-defined facets are not globally managed |
| if (_C_n_usr_facets) { |
| _RWSTD_ASSERT (0 != _C_usr_facets); |
| return false; |
| } |
| |
| _RWSTD_ASSERT (0 == _C_usr_facets); |
| |
| if (_C_all == _C_std_facet_bits && 0 == _C_byname_facet_bits) { |
| // optimized for the C locale |
| _RWSTD_ASSERT (__rw_is_C (_C_name)); |
| |
| return true; |
| } |
| |
| // unless all facets in the same category come either from |
| // the C locale or from some named locale the locale object |
| // containing the facets is not managed (this test doesn't |
| // detect categores of all byname facets not all of which |
| // belong to the same named locale) |
| if ( (_C_std_facet_bits & _C_all) != _C_all |
| || ( (_C_byname_facet_bits & _C_collate) |
| && (_C_byname_facet_bits & _C_collate) != _C_collate) |
| || ( (_C_byname_facet_bits & _C_ctype) |
| && (_C_byname_facet_bits & _C_ctype) != _C_ctype) |
| || ( (_C_byname_facet_bits & _C_monetary) |
| && (_C_byname_facet_bits & _C_monetary) != _C_monetary) |
| || ( (_C_byname_facet_bits & _C_numeric) |
| && (_C_byname_facet_bits & _C_numeric) != _C_numeric) |
| || ( (_C_byname_facet_bits & _C_time) |
| && (_C_byname_facet_bits & _C_time) != _C_time) |
| || ( (_C_byname_facet_bits & _C_messages) |
| && (_C_byname_facet_bits & _C_messages) != _C_messages)) |
| return false; |
| |
| // check whether all _byname facets in each category belong |
| // to the same named locale; facets witout byname forms are |
| // excluded from this test |
| // note that the locale may have a combined name such as |
| // "/de/en/fr/it/ja/ru" |
| const char* locname = _C_name ? _C_name : "C"; |
| |
| if (*_RWSTD_CAT_SEP == *locname) |
| ++locname; |
| |
| // find the first category separator (if any) and compute |
| // the length of the name of the first category's locale |
| // (don't bother when combined locales don't exist, i.e., |
| // when no locale separator is defined) |
| const char* next = |
| *_RWSTD_CAT_SEP ? strchr (locname, *_RWSTD_CAT_SEP) : 0; |
| |
| size_t loclen = next ? next - locname : strlen (locname); |
| |
| // iterate over all standard facets, comparing the name of the |
| // locale each comes from with the name of the category encoded |
| // in the locale name for equality; a mismatch indicates that |
| // the locale is not managed |
| for (size_t i = 0, catinx = 0; i != _C_n_std_facets; ++i) { |
| |
| if (0 == _C_std_facets [i]) { |
| // skip facets that are not installed |
| continue; |
| } |
| |
| const __rw_facet::_C_facet_type facet_type = |
| _C_get_facet_type (*_C_std_facets [i]); |
| |
| switch (facet_type) { |
| case __rw_facet::_C_money_get: |
| case __rw_facet::_C_money_put: |
| case __rw_facet::_C_num_get: |
| case __rw_facet::_C_num_put: |
| case __rw_facet::_C_wmoney_get: |
| case __rw_facet::_C_wmoney_put: |
| case __rw_facet::_C_wnum_get: |
| case __rw_facet::_C_wnum_put: |
| // skip facets with no _byname forms |
| continue; |
| default: |
| break; |
| } |
| |
| // iterate through the names of categories in the combined |
| // locale name looking for one that the facet belongs to |
| while (next && !(__rw_cats [catinx].facet_bits & (1 << i))) { |
| |
| if (*next) { |
| // advance past the category separator to the name |
| // of the next category in the (potentially combined) |
| // locale name |
| _RWSTD_ASSERT (*next == *_RWSTD_CAT_SEP); |
| |
| locname = ++next; |
| ++catinx; |
| } |
| else { |
| // reset to the name of the first category |
| locname = _C_name ? _C_name : "C"; |
| catinx = 0; |
| } |
| |
| // skip over the category separator |
| if (*_RWSTD_CAT_SEP == *locname) |
| ++locname; |
| |
| next = strchr (locname, *_RWSTD_CAT_SEP); |
| if (next) |
| loclen = next - locname; |
| else { |
| loclen = strlen (locname); |
| next = ""; |
| } |
| } |
| |
| // get the facet name (or "C" if null) |
| const char* const facet_name = |
| _C_std_facets [i]->_C_get_name (); |
| |
| _RWSTD_ASSERT (0 != facet_name); |
| _RWSTD_ASSERT (0 != locname); |
| |
| // mismatch indicates a combined category |
| if ( strlen (facet_name) != loclen |
| || memcmp (locname, facet_name, loclen)) { |
| // locales with heterogeneous categories are not managed |
| return false; |
| } |
| } |
| |
| // locales with all heterogeneous categories are managed |
| return true; |
| } |
| |
| // in order for the entire category to be considered globally managed, |
| // all its facets must come from the same (named or unnamed) locale |
| // i.e., if the LC_CTYPE category contains codecvt from "de_DE" and |
| // ctype from "en_US", the category is not considered globally managed |
| // because it doesn't have a unambiguous name |
| const int bits = _C_LC2facet_bits (cat); |
| |
| const int std_bits = bits & int (_C_std_facet_bits); |
| |
| if (std_bits ? bits == std_bits |
| : bits == (bits & int (_C_byname_facet_bits))) |
| return true; |
| |
| return false; |
| } |
| |
| |
| } // namespace __rw |
| |
| |
| /***************************************************************************/ |
| |
| |
| #include <memory> |
| #include <loc/_locale.h> |
| |
| #include <rw/_defs.h> |
| |
| |
| _RWSTD_NAMESPACE (std) { |
| |
| |
| const locale& |
| locale:: |
| operator= (const locale &rhs) _THROWS (()) |
| { |
| // copy body and bump up a ref count in `rhs' |
| _RW::__rw_locale* const body = rhs._C_body; |
| |
| _RWSTD_ATOMIC_PREINCREMENT (rhs._C_body->_C_ref, false); |
| |
| |
| // _C_body is never 0 except in objects still being constructed by |
| // the combining ctor locale::locale<Facet>(const locale&, Facet*) |
| |
| if (_C_body) { |
| // dispose of old body (dtor decrements ref count and possibly deletes) |
| locale destroy (*_C_body); |
| |
| _RWSTD_UNUSED (destroy); |
| } |
| |
| // assign new body |
| _C_body = body; |
| |
| return *this; |
| } |
| |
| |
| } // namespace std |
