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//
// 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)
//
#define BOOST_LOCALE_SOURCE
#include <boost/locale/encoding.hpp>
#include <boost/locale/encoding_errors.hpp>
#include "../encoding/conv.hpp"
#include "all_generator.hpp"
#include "uconv.hpp"
#include <unicode/ucnv.h>
#include <unicode/ucnv_err.h>
#include <boost/locale/util.hpp>
#include <boost/locale/hold_ptr.hpp>
#include "codecvt.hpp"
#ifdef BOOST_MSVC
# pragma warning(disable : 4244) // loose data
#endif
#include "icu_util.hpp"
#include <vector>
namespace boost {
namespace locale {
namespace impl_icu {
class uconv_converter : public util::base_converter {
public:
uconv_converter(std::string const &encoding) :
encoding_(encoding)
{
UErrorCode err=U_ZERO_ERROR;
// No need to check err each time, this
// is how ICU works.
cvt_ = ucnv_open(encoding.c_str(),&err);
ucnv_setFromUCallBack(cvt_,UCNV_FROM_U_CALLBACK_STOP,0,0,0,&err);
ucnv_setToUCallBack(cvt_,UCNV_TO_U_CALLBACK_STOP,0,0,0,&err);
if(!cvt_ || U_FAILURE(err)) {
if(cvt_)
ucnv_close(cvt_);
throw conv::invalid_charset_error(encoding);
}
max_len_ = ucnv_getMaxCharSize(cvt_);
}
virtual ~uconv_converter()
{
ucnv_close(cvt_);
}
virtual bool is_thread_safe() const
{
return false;
}
virtual uconv_converter *clone() const
{
return new uconv_converter(encoding_);
}
uint32_t to_unicode(char const *&begin,char const *end)
{
UErrorCode err=U_ZERO_ERROR;
char const *tmp = begin;
UChar32 c=ucnv_getNextUChar(cvt_,&tmp,end,&err);
ucnv_reset(cvt_);
if(err == U_TRUNCATED_CHAR_FOUND) {
return incomplete;
}
if(U_FAILURE(err)) {
return illegal;
}
begin = tmp;
return c;
}
uint32_t from_unicode(uint32_t u,char *begin,char const *end)
{
UChar code_point[2]={0};
int len;
if(u<=0xFFFF) {
if(0xD800 <=u && u<= 0xDFFF) // No surragates
return illegal;
code_point[0]=u;
len=1;
}
else {
u-=0x10000;
code_point[0]=0xD800 | (u>>10);
code_point[1]=0xDC00 | (u & 0x3FF);
len=2;
}
UErrorCode err=U_ZERO_ERROR;
int olen = ucnv_fromUChars(cvt_,begin,end-begin,code_point,len,&err);
ucnv_reset(cvt_);
if(err == U_BUFFER_OVERFLOW_ERROR)
return incomplete;
if(U_FAILURE(err))
return illegal;
return olen;
}
virtual int max_len() const
{
return max_len_;
}
private:
std::string encoding_;
UConverter *cvt_;
int max_len_;
};
util::base_converter *create_uconv_converter(std::string const &encoding)
{
hold_ptr<util::base_converter> cvt;
try {
cvt.reset(new uconv_converter(encoding));
}
catch(std::exception const &/*e*/)
{
// no encoding so we return empty pointer
}
return cvt.release();
}
std::locale create_codecvt(std::locale const &in,std::string const &encoding,character_facet_type type)
{
if(conv::impl::normalize_encoding(encoding.c_str())=="utf8")
return util::create_utf8_codecvt(in,type);
try {
return util::create_simple_codecvt(in,encoding,type);
}
catch(boost::locale::conv::invalid_charset_error const &) {
hold_ptr<util::base_converter> cvt;
try {
cvt.reset(create_uconv_converter(encoding));
}
catch(std::exception const &/*e*/)
{
cvt.reset(new util::base_converter());
}
return util::create_codecvt_from_pointer(in,cvt.release(),type);
}
}
} // impl_icu
} // locale
} // boost
// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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