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/***********************************************/
/**
* @file format.cpp
*
* @brief Format of numbers.
*
* @author Torsten Mayer-Guerr
* @author Sebastian Strasser
* @date 2016-07-15
*
*/
/***********************************************/
#include "base/importStd.h"
#include "base/time.h"
#include "base/format.h"
#include <regex>
/***** FUNCTIONS *******************************/
std::string operator%(LongDouble value, const std::string &format)
{
try
{
UInt year=0, month=0, day=0, hour=0, min=0;
Double sec=0;
Int secondPrecision = -1;
// parse format string -> calculate new result string
std::string result;
std::string::size_type posFormat = 0;
for(;;)
{
if(posFormat >= format.size())
break;
std::string::size_type posFormatOld = posFormat;
posFormat = format.find('%', posFormatOld);
result += format.substr(posFormatOld, posFormat-posFormatOld);
if(posFormat == std::string::npos)
break;
posFormat++;
if(posFormat>=format.size())
throw(Exception("expecting qualifier after '%'"));
// parse %[flags][width][.precision]specifier format
std::stringstream ss;
auto c = format.at(posFormat++);
Bool hasSubSpecifiers = FALSE;
// [flags]
for(;;)
{
if(c=='0') ss.fill('0');
else if(c==' ') ss.fill(' ');
else if(c=='-') ss.setf(std::ios_base::left, std::ios_base::adjustfield);
else if(c=='#') throw(Exception("'#' not supported"));
else if(c=='+') throw(Exception("'+' not supported"));
else break;
c = format.at(posFormat++);
hasSubSpecifiers = TRUE;
}
// [width]
if(std::isdigit(c))
{
const char *ptr1 = format.c_str()+posFormat-1;
char *ptr2;
ss.width(std::strtol(ptr1, &ptr2, 10));
posFormat += ptr2-ptr1-1;
c = format.at(posFormat++);
hasSubSpecifiers = TRUE;
}
// [.precision]
if(c=='.')
{
const char *ptr1 = format.c_str()+posFormat;
char *ptr2;
ss.precision(std::strtol(ptr1, &ptr2, 10));
posFormat += ptr2-ptr1;
c = format.at(posFormat++);
hasSubSpecifiers = TRUE;
}
// specifier
switch(c)
{
case '%':
{
ss<<'%';
break;
}
case 'c': // character
{
ss<<static_cast<char>(std::round(value));
break;
}
case 'i': // integer
{
ss<<static_cast<long int>(std::round(value));
break;
}
case 'f': // float
case 'e':
case 'g':
{
if(c=='e') ss.setf(std::ios::scientific, std::ios::floatfield);
if(c=='f') ss.setf(std::ios::fixed, std::ios::floatfield);
ss<<value;
break;
}
case 'O': // day of year
{
ss<<mjd2time(value).dayOfYear();
break;
}
case 'W':
{
ss<<static_cast<int>(std::floor(value)-44244)/7; //GPS week
break;
}
case 'w':
{
ss<<static_cast<int>(std::floor(value)-44244)%7; // GPS day of week
break;
}
// date/time preparation
case 'y': case 'm': case 'd':
case 'H': case 'M': case 'S':
case 'D': case 'T': case 'Y':
{
// check (once) if complete format string contains %S with precision (e.g. %.2S), find maximum precision of any %S, and round time accordingly
if(secondPrecision == -1)
{
secondPrecision = 0;
static const std::regex regexPattern("%[[\\d #+\\-]*\\.(\\d+)[S]");
std::sregex_iterator next(format.begin(), format.end(), regexPattern);
std::sregex_iterator end;
while(next != end)
{
std::smatch match = *next;
secondPrecision = std::max(std::atoi(match[1].str().c_str()), secondPrecision);
next++;
}
// round seconds to precision considering rollovers
mjd2time(value).date(year, month, day, hour, min, sec);
sec = std::round(sec*std::pow(10., secondPrecision))/std::pow(10., secondPrecision) + std::pow(10., -(secondPrecision+1));
date2time(year, month, day, hour, min, sec).date(year, month, day, hour, min, sec);
}
if(c=='y') {ss<<std::setw(4)<<std::setfill('0')<<year;}
else if(c=='m') {ss<<std::setw(2)<<std::setfill('0')<<month;}
else if(c=='d') {ss<<std::setw(2)<<std::setfill('0')<<day;}
else if(c=='H') {ss<<std::setw(2)<<std::setfill('0')<<hour;}
else if(c=='M') {ss<<std::setw(2)<<std::setfill('0')<<min;}
else if(c=='S')
{
if(hasSubSpecifiers)
{
ss.setf(std::ios::fixed, std::ios::floatfield);
ss<<sec;
}
else
ss<<std::setw(2)<<std::setfill('0')<<std::round(sec);
}
else if(c=='D') {ss<<std::setw(4)<<std::setfill('0')<<year<<"-"<<std::setw(2)<<std::setfill('0')<<month<<"-"<<std::setw(2)<<std::setfill('0')<<day;}
else if(c=='T') {ss<<std::setw(2)<<std::setfill('0')<<hour<<"-"<<std::setw(2)<<std::setfill('0')<<min<<"-"<<std::setw(2)<<std::setfill('0')<<std::round(sec);}
else if(c=='Y') {ss<<std::setw(2)<<std::setfill('0')<<year%100;}; // two digit year
break;
}
default:
throw(Exception(std::string("unknown formater '%")+c+"'"));
} // switch
result += ss.str();
} // for(;;)
return result;
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/*************************************************/
std::string operator%(const Time &x, const std::string &format)
{
LongDouble value = x.mjdMod();
value += x.mjdInt();
return value%format;
}
/*************************************************/
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