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Allow loading of huge files efficiently

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WerWolv
2020-11-22 19:43:35 +01:00
parent 5f025bcbcc
commit 43f5cc622e
8 changed files with 121 additions and 63 deletions
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90
source/views/view_information.cpp
View File

@@ -17,7 +17,15 @@ namespace hex {
ViewInformation::ViewInformation(prv::Provider* &dataProvider)
: View(), m_dataProvider(dataProvider) {
View::subscribeEvent(Events::DataChanged, [this](const void*) {
this->m_shouldInvalidate = true;
this->m_dataValid = false;
this->m_highestBlockEntropy = 0;
this->m_blockEntropy.clear();
this->m_averageEntropy = 0;
this->m_blockSize = 0;
this->m_valueCounts.fill(0x00);
this->m_mimeType = "";
this->m_fileDescription = "";
this->m_analyzedRegion = { 0, 0 };
});
}
@@ -48,6 +56,8 @@ namespace hex {
if (this->m_dataProvider != nullptr && this->m_dataProvider->isReadable()) {
if (this->m_shouldInvalidate) {
this->m_analyzedRegion = { this->m_dataProvider->getBaseAddress(), this->m_dataProvider->getBaseAddress() + this->m_dataProvider->getSize() };
{
this->m_blockSize = std::ceil(this->m_dataProvider->getSize() / 2048.0F);
std::vector<u8> buffer(this->m_blockSize, 0x00);
@@ -70,7 +80,7 @@ namespace hex {
}
{
std::vector<u8> buffer(std::min(this->m_dataProvider->getSize(), size_t(0xFF'FFFF)), 0x00);
std::vector<u8> buffer(this->m_dataProvider->getSize(), 0x00);
this->m_dataProvider->read(0x00, buffer.data(), buffer.size());
this->m_fileDescription.clear();
@@ -112,53 +122,67 @@ namespace hex {
this->m_shouldInvalidate = false;
this->m_dataValid = true;
}
}
ImGui::NewLine();
for (auto &[name, value] : this->m_dataProvider->getDataInformation()) {
ImGui::LabelText(name.c_str(), "%s", value.c_str());
}
if (ImGui::Button("Analyze current page"))
this->m_shouldInvalidate = true;
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
if (!this->m_fileDescription.empty()) {
ImGui::TextUnformatted("Description:");
ImGui::TextWrapped("%s", this->m_fileDescription.c_str());
if (this->m_dataValid) {
for (auto &[name, value] : this->m_dataProvider->getDataInformation()) {
ImGui::LabelText(name.c_str(), "%s", value.c_str());
}
ImGui::LabelText("Analyzed region", "0x%llx - 0x%llx", this->m_analyzedRegion.first, this->m_analyzedRegion.second);
ImGui::NewLine();
}
if (!this->m_mimeType.empty()) {
ImGui::TextUnformatted("MIME Type:");
ImGui::TextWrapped("%s", this->m_mimeType.c_str());
ImGui::Separator();
ImGui::NewLine();
}
ImGui::Separator();
ImGui::NewLine();
if (!this->m_fileDescription.empty()) {
ImGui::TextUnformatted("Description:");
ImGui::TextWrapped("%s", this->m_fileDescription.c_str());
ImGui::NewLine();
}
ImGui::Text("Byte Distribution");
ImGui::PlotHistogram("##nolabel", this->m_valueCounts.data(), 256, 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
if (!this->m_mimeType.empty()) {
ImGui::TextUnformatted("MIME Type:");
ImGui::TextWrapped("%s", this->m_mimeType.c_str());
ImGui::NewLine();
}
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
ImGui::Text("Entropy");
ImGui::PlotLines("##nolabel", this->m_blockEntropy.data(), this->m_blockEntropy.size(), 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
ImGui::NewLine();
ImGui::LabelText("Block size", "2048 blocks à %lu bytes", this->m_blockSize);
ImGui::LabelText("Average entropy", "%.8f", this->m_averageEntropy);
ImGui::LabelText("Highest entropy block", "%.8f", this->m_highestBlockEntropy);
if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
ImGui::Separator();
ImGui::NewLine();
ImGui::TextColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F), "This data is most likely encrypted or compressed!");
ImGui::Text("Byte Distribution");
ImGui::PlotHistogram("##nolabel", this->m_valueCounts.data(), 256, 0, nullptr, FLT_MAX, FLT_MAX,ImVec2(0, 100));
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
ImGui::Text("Entropy");
ImGui::PlotLines("##nolabel", this->m_blockEntropy.data(), this->m_blockEntropy.size(), 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
ImGui::NewLine();
ImGui::LabelText("Block size", "2048 blocks à %lu bytes", this->m_blockSize);
ImGui::LabelText("Average entropy", "%.8f", this->m_averageEntropy);
ImGui::LabelText("Highest entropy block", "%.8f", this->m_highestBlockEntropy);
if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
ImGui::NewLine();
ImGui::TextColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F),"This data is most likely encrypted or compressed!");
}
}
}