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@@ -9,6 +9,8 @@
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#include <math.h>
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#include <chrono>
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#include <ctime>
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#include <time.h>
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#include <iconv.h>
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//---------------------------------------------------------------------------//
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@@ -142,6 +144,78 @@ namespace imc
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return sumstr;
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}
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// convert encoding of any descriptions, channel-names, units etc.
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class iconverter
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{
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std::string in_enc_, out_enc_;
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iconv_t cd_;
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size_t out_buffer_size_;
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public:
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iconverter(std::string in_enc, std::string out_enc, size_t out_buffer_size = 1024) :
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in_enc_(in_enc), out_enc_(out_enc), out_buffer_size_(out_buffer_size)
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{
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// allocate descriptor for character set conversion
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// (https://man7.org/linux/man-pages/man3/iconv_open.3.html)
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cd_ = iconv_open(out_enc.c_str(), in_enc.c_str());
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if ( (iconv_t)-1 == cd_ )
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{
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if ( errno == EINVAL )
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{
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std::string errmsg = std::string("The encoding conversion from ") + in_enc
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+ std::string(" to ") + out_enc + std::string(" is not supported by the implementation.");
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throw std::runtime_error(errmsg);
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}
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}
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}
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void convert(std::string &astring)
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{
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if ( astring.empty() ) return;
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std::vector<char> in_buffer(astring.begin(),astring.end());
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char *inbuf = &in_buffer[0];
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size_t inbytes = in_buffer.size();
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std::vector<char> out_buffer(out_buffer_size_);
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char *outbuf = &out_buffer[0];
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size_t outbytes = out_buffer.size();
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// perform character set conversion
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// ( - https://man7.org/linux/man-pages/man3/iconv.3.html
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// - https://www.ibm.com/docs/en/zos/2.2.0?topic=functions-iconv-code-conversion )
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while ( inbytes > 0 )
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{
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size_t res = iconv(cd_,&inbuf,&inbytes,&outbuf,&outbytes);
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if ( (size_t)-1 == res )
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{
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std::string errmsg;
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if ( errno == EILSEQ )
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{
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errmsg = std::string("An invalid multibyte sequence is encountered in the input.");
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throw std::runtime_error(errmsg);
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}
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else if ( errno == EINVAL )
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{
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errmsg = std::string("An incomplete multibyte sequence is encountered in the input")
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+ std::string(" and the input byte sequence terminates after it.");
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}
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else if ( errno == E2BIG )
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{
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errmsg = std::string("The output buffer has no more room for the next converted character.");
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}
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throw std::runtime_error(errmsg);
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}
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}
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std::string outstring(out_buffer.begin(),out_buffer.end()-outbytes);
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astring = outstring;
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}
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};
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// channel
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struct channel
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{
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@@ -301,9 +375,12 @@ namespace imc
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double secs_int;
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trigger_time_frac_secs_ = modf((double)secs,&secs_int);
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tms.tm_sec = (int)secs_int;
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//tms.tm_isdst = -1;
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// generate std::chrono::system_clock::time_point type
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std::time_t ts = std::mktime(&tms);
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// ( - https://www.gnu.org/software/libc/manual/html_node/Broken_002ddown-Time.html
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// - https://man7.org/linux/man-pages/man3/tzset.3.html )
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std::time_t ts = timegm(&tms); //std::mktime(&tms);
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trigger_time_ = std::chrono::system_clock::from_time_t(ts);
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}
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@@ -313,6 +390,9 @@ namespace imc
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// calculate absolute trigger-time
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absolute_trigger_time_ = trigger_time_ + std::chrono::seconds(addtime_);
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// + std::chrono::nanoseconds((long int)(trigger_time_frac_secs_*1.e9));
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// convert any non-UTF-8 codepage to UTF-8
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convert_encoding();
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}
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// convert buffer to actual datatype
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@@ -400,6 +480,33 @@ namespace imc
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}
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}
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// convert any description, units etc. to UTF-8 (by default)
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void convert_encoding()
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{
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if ( !codepage_.empty() )
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{
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// construct iconv-compatible name for respective codepage
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std::string cpn = std::string("CP") + codepage_;
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// set up converter
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std::string utf = std::string("UTF-8");
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iconverter conv(cpn,utf);
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conv.convert(name_);
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conv.convert(comment_);
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conv.convert(origin_);
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conv.convert(origin_comment_);
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conv.convert(text_);
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conv.convert(language_code_);
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conv.convert(yname_);
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conv.convert(yunit_);
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conv.convert(xname_);
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conv.convert(xunit_);
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conv.convert(group_name_);
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conv.convert(group_comment_);
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}
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}
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// get info string
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std::string get_info(int width = 20)
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{
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@@ -413,8 +520,8 @@ namespace imc
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<<std::setw(width)<<std::left<<"comment:"<<comment_<<"\n"
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<<std::setw(width)<<std::left<<"origin:"<<origin_<<"\n"
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<<std::setw(width)<<std::left<<"description:"<<text_<<"\n"
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<<std::setw(width)<<std::left<<"trigger-time-nt:"<<std::put_time(std::localtime(&tt),"%FT%T")<<"\n"
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<<std::setw(width)<<std::left<<"trigger-time:"<<std::put_time(std::localtime(&att),"%FT%T")<<"\n"
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<<std::setw(width)<<std::left<<"trigger-time-nt:"<<std::put_time(std::gmtime(&tt),"%FT%T")<<"\n"
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<<std::setw(width)<<std::left<<"trigger-time:"<<std::put_time(std::gmtime(&att),"%FT%T")<<"\n"
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<<std::setw(width)<<std::left<<"language-code:"<<language_code_<<"\n"
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<<std::setw(width)<<std::left<<"codepage:"<<codepage_<<"\n"
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<<std::setw(width)<<std::left<<"yname:"<<yname_<<"\n"
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@@ -451,8 +558,8 @@ namespace imc
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<<"\",\"comment\":\""<<comment_
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<<"\",\"origin\":\""<<origin_
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<<"\",\"description\":\""<<text_
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<<"\",\"trigger-time-nt\":\""<<std::put_time(std::localtime(&tt),"%FT%T")
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<<"\",\"trigger-time\":\""<<std::put_time(std::localtime(&att),"%FT%T")
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<<"\",\"trigger-time-nt\":\""<<std::put_time(std::gmtime(&tt),"%FT%T")
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<<"\",\"trigger-time\":\""<<std::put_time(std::gmtime(&att),"%FT%T")
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<<"\",\"language-code\":\""<<language_code_
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<<"\",\"codepage\":\""<<codepage_
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<<"\",\"yname\":\""<<prepjsonstr(yname_)
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