ecency-mobile/ios/Pods/boost-for-react-native/boost/locale/message.hpp

808 lines
28 KiB
C++

//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_LOCALE_MESSAGE_HPP_INCLUDED
#define BOOST_LOCALE_MESSAGE_HPP_INCLUDED
#include <boost/locale/config.hpp>
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable : 4275 4251 4231 4660)
#endif
#include <locale>
#include <string>
#include <vector>
#include <set>
#include <memory>
#include <boost/locale/formatting.hpp>
namespace boost {
namespace locale {
///
/// \defgroup message Message Formatting (translation)
///
///This module provides message translation functionality, i.e. allow your application to speak native language
///
/// @{
///
/// \cond INTERNAL
template<typename CharType>
struct base_message_format: public std::locale::facet
{
};
/// \endcond
///
/// \brief This facet provides message formatting abilities
///
template<typename CharType>
class message_format : public base_message_format<CharType>
{
public:
///
/// Character type
///
typedef CharType char_type;
///
/// String type
///
typedef std::basic_string<CharType> string_type;
///
/// Default constructor
///
message_format(size_t refs = 0) :
base_message_format<CharType>(refs)
{
}
///
/// This function returns a pointer to the string for a message defined by a \a context
/// and identification string \a id. Both create a single key for message lookup in
/// a domain defined by \a domain_id.
///
/// If \a context is NULL it is not considered to be a part of the key
///
/// If a translated string is found, it is returned, otherwise NULL is returned
///
///
virtual char_type const *get(int domain_id,char_type const *context,char_type const *id) const = 0;
///
/// This function returns a pointer to the string for a plural message defined by a \a context
/// and identification string \a single_id.
///
/// If \a context is NULL it is not considered to be a part of the key
///
/// Both create a single key for message lookup in
/// a domain defined \a domain_id. \a n is used to pick the correct translation string for a specific
/// number.
///
/// If a translated string is found, it is returned, otherwise NULL is returned
///
///
virtual char_type const *get(int domain_id,char_type const *context,char_type const *single_id,int n) const = 0;
///
/// Convert a string that defines \a domain to the integer id used by \a get functions
///
virtual int domain(std::string const &domain) const = 0;
///
/// Convert the string \a msg to target locale's encoding. If \a msg is already
/// in target encoding it would be returned otherwise the converted
/// string is stored in temporary \a buffer and buffer.c_str() is returned.
///
/// Note: for char_type that is char16_t, char32_t and wchar_t it is no-op, returns
/// msg
///
virtual char_type const *convert(char_type const *msg,string_type &buffer) const = 0;
#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
std::locale::id& __get_id (void) const { return id; }
#endif
protected:
virtual ~message_format()
{
}
};
/// \cond INTERNAL
namespace details {
inline bool is_us_ascii_char(char c)
{
// works for null terminated strings regardless char "signness"
return 0<c && c<0x7F;
}
inline bool is_us_ascii_string(char const *msg)
{
while(*msg) {
if(!is_us_ascii_char(*msg++))
return false;
}
return true;
}
template<typename CharType>
struct string_cast_traits {
static CharType const *cast(CharType const *msg,std::basic_string<CharType> &/*unused*/)
{
return msg;
}
};
template<>
struct string_cast_traits<char> {
static char const *cast(char const *msg,std::string &buffer)
{
if(is_us_ascii_string(msg))
return msg;
buffer.reserve(strlen(msg));
char c;
while((c=*msg++)!=0) {
if(is_us_ascii_char(c))
buffer+=c;
}
return buffer.c_str();
}
};
} // details
/// \endcond
///
/// \brief This class represents a message that can be converted to a specific locale message
///
/// It holds the original ASCII string that is queried in the dictionary when converting to the output string.
/// The created string may be UTF-8, UTF-16, UTF-32 or other 8-bit encoded string according to the target
/// character type and locale encoding.
///
template<typename CharType>
class basic_message {
public:
typedef CharType char_type; ///< The character this message object is used with
typedef std::basic_string<char_type> string_type; ///< The string type this object can be used with
typedef message_format<char_type> facet_type; ///< The type of the facet the messages are fetched with
///
/// Create default empty message
///
basic_message() :
n_(0),
c_id_(0),
c_context_(0),
c_plural_(0)
{
}
///
/// Create a simple message from 0 terminated string. The string should exist
/// until the message is destroyed. Generally useful with static constant strings
///
explicit basic_message(char_type const *id) :
n_(0),
c_id_(id),
c_context_(0),
c_plural_(0)
{
}
///
/// Create a simple plural form message from 0 terminated strings. The strings should exist
/// until the message is destroyed. Generally useful with static constant strings.
///
/// \a n is the number, \a single and \a plural are singular and plural forms of the message
///
explicit basic_message(char_type const *single,char_type const *plural,int n) :
n_(n),
c_id_(single),
c_context_(0),
c_plural_(plural)
{
}
///
/// Create a simple message from 0 terminated strings, with context
/// information. The string should exist
/// until the message is destroyed. Generally useful with static constant strings
///
explicit basic_message(char_type const *context,char_type const *id) :
n_(0),
c_id_(id),
c_context_(context),
c_plural_(0)
{
}
///
/// Create a simple plural form message from 0 terminated strings, with context. The strings should exist
/// until the message is destroyed. Generally useful with static constant strings.
///
/// \a n is the number, \a single and \a plural are singular and plural forms of the message
///
explicit basic_message(char_type const *context,char_type const *single,char_type const *plural,int n) :
n_(n),
c_id_(single),
c_context_(context),
c_plural_(plural)
{
}
///
/// Create a simple message from a string.
///
explicit basic_message(string_type const &id) :
n_(0),
c_id_(0),
c_context_(0),
c_plural_(0),
id_(id)
{
}
///
/// Create a simple plural form message from strings.
///
/// \a n is the number, \a single and \a plural are single and plural forms of the message
///
explicit basic_message(string_type const &single,string_type const &plural,int number) :
n_(number),
c_id_(0),
c_context_(0),
c_plural_(0),
id_(single),
plural_(plural)
{
}
///
/// Create a simple message from a string with context.
///
explicit basic_message(string_type const &context,string_type const &id) :
n_(0),
c_id_(0),
c_context_(0),
c_plural_(0),
id_(id),
context_(context)
{
}
///
/// Create a simple plural form message from strings.
///
/// \a n is the number, \a single and \a plural are single and plural forms of the message
///
explicit basic_message(string_type const &context,string_type const &single,string_type const &plural,int number) :
n_(number),
c_id_(0),
c_context_(0),
c_plural_(0),
id_(single),
context_(context),
plural_(plural)
{
}
///
/// Copy an object
///
basic_message(basic_message const &other) :
n_(other.n_),
c_id_(other.c_id_),
c_context_(other.c_context_),
c_plural_(other.c_plural_),
id_(other.id_),
context_(other.context_),
plural_(other.plural_)
{
}
///
/// Assign other message object to this one
///
basic_message const &operator=(basic_message const &other)
{
if(this==&other) {
return *this;
}
basic_message tmp(other);
swap(tmp);
return *this;
}
///
/// Swap two message objects
///
void swap(basic_message &other)
{
std::swap(n_,other.n_);
std::swap(c_id_,other.c_id_);
std::swap(c_context_,other.c_context_);
std::swap(c_plural_,other.c_plural_);
id_.swap(other.id_);
context_.swap(other.context_);
plural_.swap(other.plural_);
}
///
/// Message class can be explicitly converted to string class
///
operator string_type () const
{
return str();
}
///
/// Translate message to a string in the default global locale, using default domain
///
string_type str() const
{
std::locale loc;
return str(loc,0);
}
///
/// Translate message to a string in the locale \a locale, using default domain
///
string_type str(std::locale const &locale) const
{
return str(locale,0);
}
///
/// Translate message to a string using locale \a locale and message domain \a domain_id
///
string_type str(std::locale const &locale,std::string const &domain_id) const
{
int id=0;
if(std::has_facet<facet_type>(locale))
id=std::use_facet<facet_type>(locale).domain(domain_id);
return str(locale,id);
}
///
/// Translate message to a string using the default locale and message domain \a domain_id
///
string_type str(std::string const &domain_id) const
{
int id=0;
std::locale loc;
if(std::has_facet<facet_type>(loc))
id=std::use_facet<facet_type>(loc).domain(domain_id);
return str(loc,id);
}
///
/// Translate message to a string using locale \a loc and message domain index \a id
///
string_type str(std::locale const &loc,int id) const
{
string_type buffer;
char_type const *ptr = write(loc,id,buffer);
if(ptr == buffer.c_str())
return buffer;
else
buffer = ptr;
return buffer;
}
///
/// Translate message and write to stream \a out, using imbued locale and domain set to the
/// stream
///
void write(std::basic_ostream<char_type> &out) const
{
std::locale const &loc = out.getloc();
int id = ios_info::get(out).domain_id();
string_type buffer;
out << write(loc,id,buffer);
}
private:
char_type const *plural() const
{
if(c_plural_)
return c_plural_;
if(plural_.empty())
return 0;
return plural_.c_str();
}
char_type const *context() const
{
if(c_context_)
return c_context_;
if(context_.empty())
return 0;
return context_.c_str();
}
char_type const *id() const
{
return c_id_ ? c_id_ : id_.c_str();
}
char_type const *write(std::locale const &loc,int domain_id,string_type &buffer) const
{
char_type const *translated = 0;
static const char_type empty_string[1] = {0};
char_type const *id = this->id();
char_type const *context = this->context();
char_type const *plural = this->plural();
if(*id == 0)
return empty_string;
facet_type const *facet = 0;
if(std::has_facet<facet_type>(loc))
facet = &std::use_facet<facet_type>(loc);
if(facet) {
if(!plural) {
translated = facet->get(domain_id,context,id);
}
else {
translated = facet->get(domain_id,context,id,n_);
}
}
if(!translated) {
char_type const *msg = plural ? ( n_ == 1 ? id : plural) : id;
if(facet) {
translated = facet->convert(msg,buffer);
}
else {
translated = details::string_cast_traits<char_type>::cast(msg,buffer);
}
}
return translated;
}
/// members
int n_;
char_type const *c_id_;
char_type const *c_context_;
char_type const *c_plural_;
string_type id_;
string_type context_;
string_type plural_;
};
///
/// Convenience typedef for char
///
typedef basic_message<char> message;
///
/// Convenience typedef for wchar_t
///
typedef basic_message<wchar_t> wmessage;
#ifdef BOOST_LOCALE_ENABLE_CHAR16_T
///
/// Convenience typedef for char16_t
///
typedef basic_message<char16_t> u16message;
#endif
#ifdef BOOST_LOCALE_ENABLE_CHAR32_T
///
/// Convenience typedef for char32_t
///
typedef basic_message<char32_t> u32message;
#endif
///
/// Translate message \a msg and write it to stream
///
template<typename CharType>
std::basic_ostream<CharType> &operator<<(std::basic_ostream<CharType> &out,basic_message<CharType> const &msg)
{
msg.write(out);
return out;
}
///
/// \anchor boost_locale_translate_family \name Indirect message translation function family
/// @{
///
/// \brief Translate a message, \a msg is not copied
///
template<typename CharType>
inline basic_message<CharType> translate(CharType const *msg)
{
return basic_message<CharType>(msg);
}
///
/// \brief Translate a message in context, \a msg and \a context are not copied
///
template<typename CharType>
inline basic_message<CharType> translate( CharType const *context,
CharType const *msg)
{
return basic_message<CharType>(context,msg);
}
///
/// \brief Translate a plural message form, \a single and \a plural are not copied
///
template<typename CharType>
inline basic_message<CharType> translate( CharType const *single,
CharType const *plural,
int n)
{
return basic_message<CharType>(single,plural,n);
}
///
/// \brief Translate a plural message from in constext, \a context, \a single and \a plural are not copied
///
template<typename CharType>
inline basic_message<CharType> translate( CharType const *context,
CharType const *single,
CharType const *plural,
int n)
{
return basic_message<CharType>(context,single,plural,n);
}
///
/// \brief Translate a message, \a msg is copied
///
template<typename CharType>
inline basic_message<CharType> translate(std::basic_string<CharType> const &msg)
{
return basic_message<CharType>(msg);
}
///
/// \brief Translate a message in context,\a context and \a msg is copied
///
template<typename CharType>
inline basic_message<CharType> translate( std::basic_string<CharType> const &context,
std::basic_string<CharType> const &msg)
{
return basic_message<CharType>(context,msg);
}
///
/// \brief Translate a plural message form in constext, \a context, \a single and \a plural are copied
///
template<typename CharType>
inline basic_message<CharType> translate( std::basic_string<CharType> const &context,
std::basic_string<CharType> const &single,
std::basic_string<CharType> const &plural,
int n)
{
return basic_message<CharType>(context,single,plural,n);
}
///
/// \brief Translate a plural message form, \a single and \a plural are copied
///
template<typename CharType>
inline basic_message<CharType> translate( std::basic_string<CharType> const &single,
std::basic_string<CharType> const &plural,
int n)
{
return basic_message<CharType>(single,plural,n);
}
/// @}
///
/// \anchor boost_locale_gettext_family \name Direct message translation functions family
///
///
/// Translate message \a id according to locale \a loc
///
template<typename CharType>
std::basic_string<CharType> gettext(CharType const *id,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(id).str(loc);
}
///
/// Translate plural form according to locale \a loc
///
template<typename CharType>
std::basic_string<CharType> ngettext( CharType const *s,
CharType const *p,
int n,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(s,p,n).str(loc);
}
///
/// Translate message \a id according to locale \a loc in domain \a domain
///
template<typename CharType>
std::basic_string<CharType> dgettext( char const *domain,
CharType const *id,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(id).str(loc,domain);
}
///
/// Translate plural form according to locale \a loc in domain \a domain
///
template<typename CharType>
std::basic_string<CharType> dngettext( char const *domain,
CharType const *s,
CharType const *p,
int n,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(s,p,n).str(loc,domain);
}
///
/// Translate message \a id according to locale \a loc in context \a context
///
template<typename CharType>
std::basic_string<CharType> pgettext( CharType const *context,
CharType const *id,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(context,id).str(loc);
}
///
/// Translate plural form according to locale \a loc in context \a context
///
template<typename CharType>
std::basic_string<CharType> npgettext( CharType const *context,
CharType const *s,
CharType const *p,
int n,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(context,s,p,n).str(loc);
}
///
/// Translate message \a id according to locale \a loc in domain \a domain in context \a context
///
template<typename CharType>
std::basic_string<CharType> dpgettext( char const *domain,
CharType const *context,
CharType const *id,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(context,id).str(loc,domain);
}
///
/// Translate plural form according to locale \a loc in domain \a domain in context \a context
///
template<typename CharType>
std::basic_string<CharType> dnpgettext(char const *domain,
CharType const *context,
CharType const *s,
CharType const *p,
int n,
std::locale const &loc=std::locale())
{
return basic_message<CharType>(context,s,p,n).str(loc,domain);
}
///
/// \cond INTERNAL
///
template<>
struct BOOST_LOCALE_DECL base_message_format<char> : public std::locale::facet
{
base_message_format(size_t refs = 0) : std::locale::facet(refs)
{
}
static std::locale::id id;
};
template<>
struct BOOST_LOCALE_DECL base_message_format<wchar_t> : public std::locale::facet
{
base_message_format(size_t refs = 0) : std::locale::facet(refs)
{
}
static std::locale::id id;
};
#ifdef BOOST_LOCALE_ENABLE_CHAR16_T
template<>
struct BOOST_LOCALE_DECL base_message_format<char16_t> : public std::locale::facet
{
base_message_format(size_t refs = 0) : std::locale::facet(refs)
{
}
static std::locale::id id;
};
#endif
#ifdef BOOST_LOCALE_ENABLE_CHAR32_T
template<>
struct BOOST_LOCALE_DECL base_message_format<char32_t> : public std::locale::facet
{
base_message_format(size_t refs = 0) : std::locale::facet(refs)
{
}
static std::locale::id id;
};
#endif
/// \endcond
///
/// @}
///
namespace as {
/// \cond INTERNAL
namespace details {
struct set_domain {
std::string domain_id;
};
template<typename CharType>
std::basic_ostream<CharType> &operator<<(std::basic_ostream<CharType> &out, set_domain const &dom)
{
int id = std::use_facet<message_format<CharType> >(out.getloc()).domain(dom.domain_id);
ios_info::get(out).domain_id(id);
return out;
}
} // details
/// \endcond
///
/// \addtogroup manipulators
///
/// @{
///
/// Manipulator for switching message domain in ostream,
///
/// \note The returned object throws std::bad_cast if the I/O stream does not have \ref message_format facet installed
///
inline
#ifdef BOOST_LOCALE_DOXYGEN
unspecified_type
#else
details::set_domain
#endif
domain(std::string const &id)
{
details::set_domain tmp = { id };
return tmp;
}
/// @}
} // as
} // locale
} // boost
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
#endif
// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4