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#include "gmxpre.h"

#include "gpp_bond_atomtype.h"

#include <cstring>

#include <algorithm>
#include <vector>

#include "gromacs/gmxpreprocess/notset.h"
#include "gromacs/topology/symtab.h"
#include "gromacs/utility/cstringutil.h"
#include "gromacs/utility/smalloc.h"

class PreprocessingBondAtomType::Impl
{
public:
    //! The atom type names.
    std::vector<char**> typeNames;
};

int PreprocessingBondAtomType::bondAtomTypeFromName(const std::string& str) const
{
    /* Atom types are always case sensitive */
    auto found =
            std::find_if(impl_->typeNames.begin(), impl_->typeNames.end(),
                         [&str](const auto& type) { return str == const_cast<const char*>(*type); });
    if (found == impl_->typeNames.end())
    {
        return NOTSET;
    }
    else
    {
        return std::distance(impl_->typeNames.begin(), found);
    }
}

const char* PreprocessingBondAtomType::atomNameFromBondAtomType(int nt) const
{
    return isSet(nt) ? *impl_->typeNames[nt] : nullptr;
}

PreprocessingBondAtomType::PreprocessingBondAtomType() : impl_(new Impl) {}

PreprocessingBondAtomType::~PreprocessingBondAtomType() {}

int PreprocessingBondAtomType::addBondAtomType(t_symtab* tab, const std::string& name)
{
    int position = bondAtomTypeFromName(name);
    if (position == NOTSET)
    {
        impl_->typeNames.emplace_back(put_symtab(tab, name.c_str()));
        return bondAtomTypeFromName(name);
    }
    else
    {
        return position;
    }
}

size_t PreprocessingBondAtomType::size() const
{
    return impl_->typeNames.size();
}

bool PreprocessingBondAtomType::isSet(int nt) const
{
    return ((nt >= 0) && (nt < gmx::ssize(*this)));
}
