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mirror of https://github.com/paboyle/Grid.git synced 2025-04-07 04:35:56 +01:00

Utilities for reading and writing "pair" objects.

This commit is contained in:
Lanny91 2017-02-06 14:08:59 +00:00
parent f510002a62
commit b7cd1a19e3
3 changed files with 62 additions and 18 deletions

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@ -36,22 +36,6 @@ See the full license in the file "LICENSE" in the top level distribution directo
#include <Grid/Hadrons/Module.hpp>
#include <Grid/Hadrons/ModuleFactory.hpp>
namespace Grid {
// Overload >> to extract gamma pair from "<g1 g2>" string.
template <typename T1, typename T2>
inline std::istringstream &operator>>(std::istringstream &sstr,
std::pair<T1, T2> &buf)
{
unsigned int buf1;
unsigned int buf2;
char c;
sstr >> c >> buf1 >> buf2 >> c;
sstr.peek();
buf = std::make_pair((T1)buf1, (T2)buf2);
return sstr;
}
}
BEGIN_HADRONS_NAMESPACE
/*
@ -63,8 +47,8 @@ BEGIN_HADRONS_NAMESPACE
- q1: input propagator 1 (string)
- q2: input propagator 2 (string)
- gammas: gamma products to insert at sink & source, pairs of gamma matrices
(space-separated integers) in square brackets (i.e. [g_sink g_src]),
in a sequence (e.g. "[15 7][7 15][7 7]").
(space-separated strings) in angled brackets (i.e. <g_sink g_src>),
in a sequence (e.g. "<Gamma5 Gamma5><Gamma5 GammaT>").
Special values: "all" - perform all possible contractions.
- mom: momentum insertion, space-separated float sequence (e.g ".1 .2 1. 0."),

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@ -138,6 +138,54 @@ namespace Grid {
unsigned int dimInd_{0};
};
// Pair IO utilities /////////////////////////////////////////////////////////
// helper function to parse input in the format "<obj1 obj2>"
template <typename T1, typename T2>
inline std::istream & operator>>(std::istream &is, std::pair<T1, T2> &buf)
{
T1 buf1;
T2 buf2;
char c;
// Search for "pair" delimiters.
do
{
is.get(c);
} while (c != '<' && !is.eof());
if (c == '<')
{
int start = is.tellg();
do
{
is.get(c);
} while (c != '>' && !is.eof());
if (c == '>')
{
int end = is.tellg();
int psize = end - start - 1;
// Only read data between pair limiters.
is.seekg(start);
std::string tmpstr(psize, ' ');
is.read(&tmpstr[0], psize);
std::istringstream temp(tmpstr);
temp >> buf1 >> buf2;
buf = std::make_pair(buf1, buf2);
is.seekg(end);
}
}
is.peek();
return is;
}
// output to streams for pairs
template <class T1, class T2>
inline std::ostream & operator<<(std::ostream &os, const std::pair<T1, T2> &p)
{
os << "<" << p.first << " " << p.second << ">";
return os;
}
// Abstract writer/reader classes ////////////////////////////////////////////
// static polymorphism implemented using CRTP idiom
class Serializable;

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@ -113,6 +113,7 @@ int main(int argc,char **argv)
// test serializable class writing
myclass obj(1234); // non-trivial constructor
std::vector<myclass> vec;
std::pair<myenum, myenum> pair;
std::cout << "-- serialisable class writing to 'bother.xml'..." << std::endl;
write(WR,"obj",obj);
@ -120,6 +121,8 @@ int main(int argc,char **argv)
vec.push_back(myclass(1234));
vec.push_back(myclass(5678));
vec.push_back(myclass(3838));
pair = std::make_pair(myenum::red, myenum::blue);
write(WR, "objvec", vec);
std::cout << "-- serialisable class writing to std::cout:" << std::endl;
std::cout << obj << std::endl;
@ -127,21 +130,30 @@ int main(int argc,char **argv)
std::cout << "vec[0] == obj: " << ((vec[0] == obj) ? "true" : "false") << std::endl;
std::cout << "vec[1] == obj: " << ((vec[1] == obj) ? "true" : "false") << std::endl;
write(WR, "objpair", pair);
std::cout << "-- pair writing to std::cout:" << std::endl;
std::cout << pair << std::endl;
// read tests
std::cout << "\n==== IO self-consistency tests" << std::endl;
//// XML
ioTest<XmlWriter, XmlReader>("iotest.xml", obj, "XML (object) ");
ioTest<XmlWriter, XmlReader>("iotest.xml", vec, "XML (vector of objects)");
ioTest<XmlWriter, XmlReader>("iotest.xml", pair, "XML (pair of objects)");
//// binary
ioTest<BinaryWriter, BinaryReader>("iotest.bin", obj, "binary (object) ");
ioTest<BinaryWriter, BinaryReader>("iotest.bin", vec, "binary (vector of objects)");
ioTest<BinaryWriter, BinaryReader>("iotest.bin", pair, "binary (pair of objects)");
//// text
ioTest<TextWriter, TextReader>("iotest.dat", obj, "text (object) ");
ioTest<TextWriter, TextReader>("iotest.dat", vec, "text (vector of objects)");
ioTest<TextWriter, TextReader>("iotest.dat", pair, "text (pair of objects)");
//// HDF5
#undef HAVE_HDF5
#ifdef HAVE_HDF5
ioTest<Hdf5Writer, Hdf5Reader>("iotest.h5", obj, "HDF5 (object) ");
ioTest<Hdf5Writer, Hdf5Reader>("iotest.h5", vec, "HDF5 (vector of objects)");
ioTest<Hdf5Writer, Hdf5Reader>("iotest.h5", pair, "HDF5 (pair of objects)");
#endif
std::cout << "\n==== vector flattening/reconstruction" << std::endl;