remove boost::date_time dependency

CMakeLists.txt

@@ -180,7 +180,7 @@ set(Boost_DETAILED_FAILURE_MSG ON)
 if(NOT BUILD_SHARED_LIBS)
 	set(Boost_USE_STATIC_LIBS ON)
 endif()
-find_package(Boost 1.70.0 REQUIRED COMPONENTS system iostreams regex date_time program_options)
+find_package(Boost 1.70.0 REQUIRED COMPONENTS system iostreams regex program_options)
 
 if(NOT MSVC AND Boost_USE_STATIC_LIBS)
 	find_package(ZLIB REQUIRED)

src/BondMap.cpp

@@ -28,10 +28,6 @@
 #include <algorithm>
 #include <mutex>
 
-#include <boost/iostreams/filtering_stream.hpp>
-#include <boost/iostreams/filter/gzip.hpp>
-#include <boost/iostreams/copy.hpp>
-
 #include "cif++/Cif++.hpp"
 #include "cif++/Compound.hpp"
 #include "cif++/CifUtils.hpp"

src/Cif2PDB.cpp

@@ -27,8 +27,8 @@
 #include <map>
 #include <set>
 #include <regex>
+#include <cmath>
 
-#include <boost/date_time/gregorian/gregorian.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/format.hpp>
 
@@ -3638,12 +3638,12 @@ std::tuple<int,int> WriteCoordinatesForModel(std::ostream& pdbFile, Datablock& d
 				% chainID
 				% resSeq
 				% iCode
-				% lrintf(u11 * 10000)
-				% lrintf(u22 * 10000)
-				% lrintf(u33 * 10000)
-				% lrintf(u12 * 10000)
-				% lrintf(u13 * 10000)
-				% lrintf(u23 * 10000)
+				% std::lrintf(u11 * 10000)
+				% std::lrintf(u22 * 10000)
+				% std::lrintf(u33 * 10000)
+				% std::lrintf(u12 * 10000)
+				% std::lrintf(u13 * 10000)
+				% std::lrintf(u23 * 10000)
 				% element
 				% sCharge) << std::endl;
 		}

src/PDB2Cif.cpp

@@ -28,9 +28,9 @@
 #include <set>
 #include <stack>
 #include <system_error>
+#include <iomanip>
 
 #include <boost/algorithm/string.hpp>
-#include <boost/date_time/gregorian/gregorian.hpp>
 #include <boost/format.hpp>
 #include <boost/numeric/ublas/matrix.hpp>
 
@@ -896,8 +896,6 @@ class PDBFileParser
 		{
 			if (regex_match(s, m, rx1))
 			{
-				using namespace boost::gregorian;
-
 				int day = stoi(m[1].str());
 				auto mi = kMonths.find(m[2].str());
 				if (mi == kMonths.end())
@@ -907,9 +905,12 @@ class PDBFileParser
 				if (year < 1950)
 					year += 100;
 
-				date dateOriginal(static_cast<uint16_t>(year), static_cast<uint16_t>(month), static_cast<uint16_t>(day));
+				std::stringstream ss;
+				ss << std::setw(4) << std::setfill('0') << year << '-'
+				   << std::setw(2) << std::setfill('0') << month << '-'
+				   << std::setw(2) << std::setfill('0') << day;
 
-				s = to_iso_extended_string(dateOriginal);
+				s = ss.str();
 			}
 			else if (regex_match(s, m, rx2))
 			{

src/PDB2CifRemark3.cpp

@@ -29,7 +29,6 @@
 #include <map>
 #include <set>
 
-#include <boost/date_time/gregorian/gregorian.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/format.hpp>