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Diffstat (limited to 'lib/libc/locale/xlocale_private.h')
| -rw-r--r-- | lib/libc/locale/xlocale_private.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/lib/libc/locale/xlocale_private.h b/lib/libc/locale/xlocale_private.h new file mode 100644 index 000000000000..272d15ec8c83 --- /dev/null +++ b/lib/libc/locale/xlocale_private.h @@ -0,0 +1,198 @@ +/*- + * Copyright (c) 2011 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by David Chisnall under sponsorship from + * the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _XLOCALE_PRIVATE__H_ +#define _XLOCALE_PRIVATE__H_ + +#include <xlocale.h> +#include <locale.h> +#include <stdlib.h> +#include <stdint.h> +#include <sys/types.h> +#include <machine/atomic.h> +#include "setlocale.h" + +enum { + XLC_COLLATE = 0, + XLC_CTYPE, + XLC_MONETARY, + XLC_NUMERIC, + XLC_TIME, + XLC_MESSAGES, + XLC_LAST +}; + + +/** + * Header used for objects that are reference counted. Objects may optionally + * have a destructor associated, which is responsible for destroying the + * structure. Global / static versions of the structure should have no + * destructor set - they can then have their reference counts manipulated as + * normal, but will not do anything with them. + * + * The header stores a retain count - objects are assumed to have a reference + * count of 1 when they are created, but the retain count is 0. When the + * retain count is less than 0, they are freed. + */ +struct xlocale_refcounted { + /** Number of references to this component. */ + long retain_count; + /** Function used to destroy this component, if one is required*/ + void(*destructor)(void*); +}; +/** + * Header for a locale component. All locale components must begin with this + * header. + */ +struct xlocale_component { + struct xlocale_refcounted header; + /** Name of the locale used for this component. */ + char locale[ENCODING_LEN+1]; +}; + +/** + * xlocale structure, stores per-thread locale information. + */ +struct _xlocale { + struct xlocale_refcounted header; + /** Components for the locale. */ + struct xlocale_component *components[XLC_LAST]; + /** Flag indicating if components[XLC_MONETARY] has changed since the last + * call to localeconv_l() with this locale. */ + int monetary_locale_changed; + /** Flag indicating whether this locale is actually using a locale for + * LC_MONETARY (1), or if it should use the C default instead (0). */ + int using_monetary_locale; + /** Flag indicating if components[XLC_NUMERIC] has changed since the last + * call to localeconv_l() with this locale. */ + int numeric_locale_changed; + /** Flag indicating whether this locale is actually using a locale for + * LC_NUMERIC (1), or if it should use the C default instead (0). */ + int using_numeric_locale; + /** Flag indicating whether this locale is actually using a locale for + * LC_TIME (1), or if it should use the C default instead (0). */ + int using_time_locale; + /** Flag indicating whether this locale is actually using a locale for + * LC_MESSAGES (1), or if it should use the C default instead (0). */ + int using_messages_locale; + /** The structure to be returned from localeconv_l() for this locale. */ + struct lconv lconv; + /** Persistent state used by mblen() calls. */ + __mbstate_t mblen; + /** Persistent state used by mbrlen() calls. */ + __mbstate_t mbrlen; + /** Persistent state used by mbrtowc() calls. */ + __mbstate_t mbrtowc; + /** Persistent state used by mbsnrtowcs() calls. */ + __mbstate_t mbsnrtowcs; + /** Persistent state used by mbsrtowcs() calls. */ + __mbstate_t mbsrtowcs; + /** Persistent state used by mbtowc() calls. */ + __mbstate_t mbtowc; + /** Persistent state used by wcrtomb() calls. */ + __mbstate_t wcrtomb; + /** Persistent state used by wcsnrtombs() calls. */ + __mbstate_t wcsnrtombs; + /** Persistent state used by wcsrtombs() calls. */ + __mbstate_t wcsrtombs; + /** Persistent state used by wctomb() calls. */ + __mbstate_t wctomb; + /** Buffer used by nl_langinfo_l() */ + char *csym; +}; + +/** + * Increments the reference count of a reference-counted structure. + */ +__attribute__((unused)) static void* +xlocale_retain(void *val) +{ + struct xlocale_refcounted *obj = val; + atomic_add_long(&(obj->retain_count), 1); + return (val); +} +/** + * Decrements the reference count of a reference-counted structure, freeing it + * if this is the last reference, calling its destructor if it has one. + */ +__attribute__((unused)) static void +xlocale_release(void *val) +{ + struct xlocale_refcounted *obj = val; + long count = atomic_fetchadd_long(&(obj->retain_count), -1) - 1; + if (count < 0) { + if (0 != obj->destructor) { + obj->destructor(obj); + } + } +} + +/** + * Load functions. Each takes the name of a locale and a pointer to the data + * to be initialised as arguments. Two special values are allowed for the + */ +extern void* __collate_load(const char*, locale_t); +extern void* __ctype_load(const char*, locale_t); +extern void* __messages_load(const char*, locale_t); +extern void* __monetary_load(const char*, locale_t); +extern void* __numeric_load(const char*, locale_t); +extern void* __time_load(const char*, locale_t); + +extern struct _xlocale __xlocale_global_locale; +extern struct _xlocale __xlocale_C_locale; + +/** + * Returns the current locale for this thread, or the global locale if none is + * set. The caller does not have to free the locale. The return value from + * this call is not guaranteed to remain valid after the locale changes. As + * such, this should only be called within libc functions. + */ +locale_t __get_locale(void); + +/** + * Two magic values are allowed for locale_t objects. NULL and -1. This + * function maps those to the real locales that they represent. + */ +static inline locale_t get_real_locale(locale_t locale) +{ + switch ((intptr_t)locale) { + case 0: return (&__xlocale_C_locale); + case -1: return (&__xlocale_global_locale); + default: return (locale); + } +} + +/** + * Replace a placeholder locale with the real global or thread-local locale_t. + */ +#define FIX_LOCALE(l) (l = get_real_locale(l)) + +#endif |