array2DWrapper.h

 
#ifndef ARRAY_2D_WRAPPER_H
#define ARRAY_2D_WRAPPER_H
 
#include "data/arrayWrapper.h"
#include "data/dataHandler.h"
#include "data/demangle.h"
 
namespace Data {
 
    template <class T> class Array2DWrapper : public ArrayWrapper<T>
    {
      private:
        mutable std::map<std::type_index, std::tuple<size_t, size_t, size_t>>
            cachedAddressSpace;
 
      protected:
        size_t width;
 
        size_t height;
 
        size_t getAddressSpace(const std::type_info& type, size_t* dim1,
                               size_t* dim2) const;
 
      public:
        Array2DWrapper(const size_t w = 2, const size_t h = 4,
                       std::vector<T>* ptr = nullptr);
 
        Array2DWrapper(const Array2DWrapper& other) = default;
 
        virtual ~Array2DWrapper() = default;
 
        virtual DataHandler* clone() const override;
 
        virtual size_t getAddressSpace(
            const std::type_info& type) const override;
 
        virtual std::vector<size_t> getAddressesAccessed(
            const std::type_info& type, const size_t address) const override;
 
        virtual UntypedSharedPtr getDataAt(const std::type_info& type,
                                           const size_t address) const override;
 
#ifdef CODE_GENERATION
        virtual std::vector<size_t> getDimensionsSize() const override;
#endif
    };
 
    template <class T>
    inline Array2DWrapper<T>::Array2DWrapper(const size_t w, const size_t h,
                                             std::vector<T>* ptr)
        : ArrayWrapper<T>(w * h, ptr), height(h), width(w)
    {
    }
 
    // Declare the child class for use in clone
    template <class T> class PrimitiveTypeArray2D;
 
    template <class T> DataHandler* Array2DWrapper<T>::clone() const
    {
        // Create a constantCopy of the ArrayWrapper content.
        DataHandler* result = new PrimitiveTypeArray2D<T>(*this);
 
        return result;
    }
 
    template <typename T>
    std::vector<size_t> Array2DWrapper<T>::getAddressesAccessed(
        const std::type_info& type, const size_t address) const
    {
        // Initialize the result
        std::vector<size_t> result;
 
        // If the accessed address is valid fill the result.
        size_t arrayHeight;
        size_t arrayWidth;
        const size_t space =
            this->getAddressSpace(type, &arrayHeight, &arrayWidth);
        if (space > address) {
            // For the native type.
            if (type == typeid(T)) {
                result.push_back(address);
            }
            else {
                // Else, the type is the array type.
                size_t addressH = address / (this->width - arrayWidth + 1);
                size_t addressW = address % (this->width - arrayWidth + 1);
                size_t addressSrc = (addressH * this->width) + addressW;
                size_t idxDst = 0;
                for (size_t idxHeight = 0; idxHeight < arrayHeight;
                     idxHeight++) {
                    for (size_t idxWidth = 0; idxWidth < arrayWidth;
                         idxWidth++) {
                        size_t idxSrc = (idxHeight * this->width) + idxWidth;
                        result.push_back(addressSrc + idxSrc);
                    }
                }
            }
        }
        return result;
    }
 
    template <typename T>
    size_t Array2DWrapper<T>::getAddressSpace(const std::type_info& type) const
    {
        // Use the utility function
        return this->getAddressSpace(type, nullptr, nullptr);
    }
 
    template <typename T>
    size_t Array2DWrapper<T>::getAddressSpace(const std::type_info& type,
                                              size_t* dim1, size_t* dim2) const
    {
        // Has the result been cached
        auto iter = this->cachedAddressSpace.find(type);
        if (iter != this->cachedAddressSpace.end()) {
            if (dim1 != nullptr) {
                *dim1 = std::get<1>(iter->second);
            }
            if (dim2 != nullptr) {
                *dim2 = std::get<2>(iter->second);
            }
            return std::get<0>(iter->second);
        }
 
        size_t result = 0;
        // The parent function is not used to avoid performing 2 regex matches.
        if (type == typeid(T)) {
            this->cachedAddressSpace.emplace(
                type, std::make_tuple(this->nbElements, 0, 0));
            result = this->nbElements;
        }
 
        // Check if it is a 1D or 2D array
        // with a size (h and w) inferior to the container dimensions.
        if (result == 0) {
            std::string typeName = DEMANGLE_TYPEID_NAME(type.name());
            std::string regex{DEMANGLE_TYPEID_NAME(typeid(T).name())};
            regex.append("\\s*(const\\s*)?\\[([0-9]+)\\](\\[([0-9]+)\\])?");
            std::regex arrayType(regex);
            std::cmatch cm;
            if (std::regex_match(typeName.c_str(), cm, arrayType)) {
                int typeH = 0;
                int typeW = 0;
                if (cm[2].matched && !cm[4].matched) {
                    // 1D array
                    typeH = 1;
                    typeW = std::atoi(cm[2].str().c_str());
                }
                else if (cm[2].matched && cm[4].matched) {
                    // 2D array
                    typeH = std::atoi(cm[2].str().c_str());
                    typeW = std::atoi(cm[4].str().c_str());
                }
 
                // Make sure dimensions are valid for this array
                // Only spatially coherent data can be provided.
                // Data spanning over several lines can not be
                // provided
                if (typeH <= this->height && typeW <= this->width) {
                    result = (this->height - typeH + 1) *
                             ((this->width - typeW + 1));
                    if (dim1 != nullptr) {
                        *dim1 = typeH;
                    }
                    if (dim2 != nullptr) {
                        *dim2 = typeW;
                    }
                    this->cachedAddressSpace.emplace(
                        type, std::make_tuple(result, typeH, typeW));
                }
            }
        }
 
        return result;
    }
 
    template <typename T>
    UntypedSharedPtr Array2DWrapper<T>::getDataAt(const std::type_info& type,
                                                  const size_t address) const
    {
#ifndef NDEBUG
        // Throw exception in case of invalid arguments.
        ArrayWrapper<T>::checkAddressAndType(type, address);
#endif
 
        if (type == typeid(T)) {
            UntypedSharedPtr result(
                &(this->containerPtr->at(address)),
                UntypedSharedPtr::emptyDestructor<const T>());
            return result;
        }
 
        // Else, the only other supported type is cstyle array (1D or 2D).
        // Because 2D arrays are array with the second dimension set to 1,
        // all the following code is generic
 
        size_t arrayHeight = 0;
        size_t arrayWidth = 0;
        size_t addressableSpace =
            this->getAddressSpace(type, &arrayHeight, &arrayWidth);
 
        // Types was checked before trying to produce
        // a return value
        auto array = new T[arrayHeight * arrayWidth];
 
        // Copy its content
        size_t addressH = address / (this->width - arrayWidth + 1);
        size_t addressW = address % (this->width - arrayWidth + 1);
        size_t addressSrc = (addressH * this->width) + addressW;
        size_t idxDst = 0;
        for (size_t idxHeight = 0; idxHeight < arrayHeight; idxHeight++) {
            for (size_t idxWidth = 0; idxWidth < arrayWidth; idxWidth++) {
                size_t idxSrc = (idxHeight * this->width) + idxWidth;
                array[idxDst++] = this->containerPtr->at(addressSrc + idxSrc);
            }
        }
 
        // Create the UntypedSharedPtr
        UntypedSharedPtr result{
            std::make_shared<UntypedSharedPtr::Model<const T[]>>(array)};
        return result;
    }
 
#ifdef CODE_GENERATION
    template <class T>
    std::vector<size_t> Array2DWrapper<T>::getDimensionsSize() const
    {
        std::vector<size_t> sizes = {height, width};
        return sizes;
    }
#endif
} // namespace Data
#endif // !ARRAY_2D_WRAPPER_H
 
// Include PrimitiveTypeArray2D to ensure availability of the used clone method.
#include "data/primitiveTypeArray2D.h"