mirror of https://github.com/qpdf/qpdf.git
124 lines
2.7 KiB
C++
124 lines
2.7 KiB
C++
#include <qpdf/SparseOHArray.hh>
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#include <stdexcept>
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SparseOHArray::SparseOHArray() :
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n_elements(0)
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{
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}
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size_t
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SparseOHArray::size() const
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{
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return this->n_elements;
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}
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void
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SparseOHArray::append(QPDFObjectHandle oh)
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{
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if (!oh.isDirectNull()) {
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this->elements[this->n_elements] = oh;
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}
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++this->n_elements;
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}
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QPDFObjectHandle
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SparseOHArray::at(size_t idx) const
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{
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if (idx >= this->n_elements) {
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throw std::logic_error(
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"INTERNAL ERROR: bounds error accessing SparseOHArray element");
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}
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auto const& iter = this->elements.find(idx);
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if (iter == this->elements.end()) {
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return QPDFObjectHandle::newNull();
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} else {
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return (*iter).second;
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}
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}
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void
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SparseOHArray::remove_last()
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{
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if (this->n_elements == 0) {
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throw std::logic_error("INTERNAL ERROR: attempt to remove"
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" last item from empty SparseOHArray");
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}
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--this->n_elements;
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this->elements.erase(this->n_elements);
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}
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void
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SparseOHArray::releaseResolved()
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{
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for (auto& iter: this->elements) {
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QPDFObjectHandle::ReleaseResolver::releaseResolved(iter.second);
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}
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}
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void
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SparseOHArray::setAt(size_t idx, QPDFObjectHandle oh)
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{
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if (idx >= this->n_elements) {
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throw std::logic_error("bounds error setting item in SparseOHArray");
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}
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if (oh.isDirectNull()) {
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this->elements.erase(idx);
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} else {
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this->elements[idx] = oh;
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}
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}
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void
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SparseOHArray::erase(size_t idx)
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{
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if (idx >= this->n_elements) {
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throw std::logic_error("bounds error erasing item from SparseOHArray");
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}
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decltype(this->elements) dest;
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for (auto const& iter: this->elements) {
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if (iter.first < idx) {
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dest.insert(iter);
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} else if (iter.first > idx) {
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dest[iter.first - 1] = iter.second;
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}
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}
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this->elements = dest;
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--this->n_elements;
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}
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void
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SparseOHArray::insert(size_t idx, QPDFObjectHandle oh)
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{
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if (idx > this->n_elements) {
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throw std::logic_error("bounds error inserting item to SparseOHArray");
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} else if (idx == this->n_elements) {
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// Allow inserting to the last position
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append(oh);
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} else {
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decltype(this->elements) dest;
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for (auto const& iter: this->elements) {
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if (iter.first < idx) {
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dest.insert(iter);
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} else {
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dest[iter.first + 1] = iter.second;
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}
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}
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this->elements = dest;
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this->elements[idx] = oh;
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++this->n_elements;
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}
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}
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SparseOHArray::const_iterator
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SparseOHArray::begin() const
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{
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return this->elements.begin();
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}
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SparseOHArray::const_iterator
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SparseOHArray::end() const
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{
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return this->elements.end();
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}
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