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PoC for the issue #980 #1449

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PoC for the issue #980 #1449

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14 changes: 13 additions & 1 deletion plugins/builtin/include/content/views/view_find.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,8 @@ namespace hex::plugin::builtin {
Sequence,
Regex,
BinaryPattern,
Value
Value,
Approximate
} mode = Mode::Strings;

enum class StringType : int { ASCII = 0, UTF16LE = 1, UTF16BE = 2, ASCII_UTF16LE = 3, ASCII_UTF16BE = 4 };
Expand Down Expand Up @@ -93,6 +94,16 @@ namespace hex::plugin::builtin {
} type = Type::U8;
} value;

struct Approximate {
std::endian endian = std::endian::native;
bool aligned = true;
bool ignore_zeroes = true;
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Use camelCase


enum class Type {
F32 = 0, F64 = 1
} type = Type::F32;
} approximate;

} m_searchSettings, m_decodeSettings;

using OccurrenceTree = wolv::container::IntervalTree<Occurrence>;
Expand All @@ -111,6 +122,7 @@ namespace hex::plugin::builtin {
static std::vector<Occurrence> searchRegex(Task &task, prv::Provider *provider, Region searchRegion, const SearchSettings::Regex &settings);
static std::vector<Occurrence> searchBinaryPattern(Task &task, prv::Provider *provider, Region searchRegion, const SearchSettings::BinaryPattern &settings);
static std::vector<Occurrence> searchValue(Task &task, prv::Provider *provider, Region searchRegion, const SearchSettings::Value &settings);
static std::vector<Occurrence> searchApproximate(Task &task, prv::Provider *provider, Region searchRegion, const SearchSettings::Approximate &settings);

void drawContextMenu(Occurrence &target, const std::string &value);

Expand Down
3 changes: 3 additions & 0 deletions plugins/builtin/romfs/lang/en_US.json
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Original file line number Diff line number Diff line change
Expand Up @@ -853,6 +853,9 @@
"hex.builtin.view.find.value.max": "Maximum Value",
"hex.builtin.view.find.value.min": "Minimum Value",
"hex.builtin.view.find.value.range": "Ranged Search",
"hex.builtin.view.find.approximate": "Almost integers",
"hex.builtin.view.find.approximate.aligned": "Aligned",
"hex.builtin.view.find.approximate.ignore_zeroes": "Skip zeroes",
"hex.builtin.view.hashes.function": "Hash function",
"hex.builtin.view.hashes.hash": "Hash",
"hex.builtin.view.hashes.hover_info": "Hover over the Hex Editor selection and hold down SHIFT to view the hashes of that region.",
Expand Down
107 changes: 107 additions & 0 deletions plugins/builtin/source/content/views/view_find.cpp
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Expand Up @@ -437,6 +437,62 @@ namespace hex::plugin::builtin {
return results;
}

std::vector<ViewFind::Occurrence> ViewFind::searchApproximate(Task &task, prv::Provider *provider, Region searchRegion, const SearchSettings::Approximate &settings) {
std::vector<Occurrence> results;

auto reader = prv::ProviderReader(provider);
reader.seek(searchRegion.getStartAddress());
reader.setEndAddress(searchRegion.getEndAddress());

using FloatingType = ViewFind::SearchSettings::Approximate::Type;
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FloatingPointType


const size_t size = settings.type == FloatingType::F32 ? sizeof(float) : sizeof(double);
const auto advance = settings.aligned ? size : 1;

std::variant<float, double> floating_var;
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Use a more descriptive name for this. What does the variable do?

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I've adapted the code for the Numeric search as we may want to add more floating types here. Please note that you used a return value of parseNumericValueInput (the middle one, min), which I thought was a dirty trick to acquire an instance of std::variant. So I made my own here.

if (settings.type == FloatingType::F32) {
floating_var = 0.F;
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0.0F
I'd probably also be explicit here and use float(0) and double(0) to make sure the right alternative is being set in the variant

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The literal suffix "f" (or "F" which Clang-tidy wanted me to use) is used to turn doubles into floats. It's what forces std::variant to accept the desired type.

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I know the suffix makes it a float but explicitly writing out the type is better in my opinion

} else {
floating_var = 0.0;
}

for (u64 address = searchRegion.getStartAddress(); address <= searchRegion.getEndAddress() - size + 1; address += advance) {
task.update(address);

auto result = std::visit([&]<typename T>(T) {
using DecayedType = std::remove_cvref_t<std::decay_t<T>>;

DecayedType value = 0;
reader.read(address, reinterpret_cast<u8*>(&value), size);
value = hex::changeEndianess(value, size, settings.endian);

if (settings.ignore_zeroes && value == T(0)) {
return false;
}

return std::floor(value) == value;
}, floating_var);

if (result) {
Occurrence::DecodeType decodeType = [&]{
switch (settings.type) {
using enum Occurrence::DecodeType;

case FloatingType::F32:
return Float;
case FloatingType::F64:
return Double;
default:
return Binary;
}
}();

results.push_back(Occurrence { Region { address, size }, decodeType, settings.endian, false });
}
}
return results;
}

void ViewFind::runSearch() {
Region searchRegion = this->m_searchSettings.region;

Expand Down Expand Up @@ -472,6 +528,9 @@ namespace hex::plugin::builtin {
case Value:
this->m_foundOccurrences.get(provider) = searchValue(task, provider, searchRegion, settings.value);
break;
case Approximate:
this->m_foundOccurrences.get(provider) = searchApproximate(task, provider, searchRegion, settings.approximate);
break;
}

this->m_sortedOccurrences.get(provider) = this->m_foundOccurrences.get(provider);
Expand All @@ -494,6 +553,7 @@ namespace hex::plugin::builtin {
using enum SearchSettings::Mode;

case Value:
case Approximate:
case Strings:
{
switch (occurrence.decodeType) {
Expand Down Expand Up @@ -800,6 +860,53 @@ namespace hex::plugin::builtin {

ImGui::EndTabItem();
}
if (ImGui::BeginTabItem("hex.builtin.view.find.approximate"_lang)) {
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Does it make sense to separate this out to a separate search tool instead of merging it into the numeric find tool?

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image
How would it fit here? I'm not trying to say it's impossible, just show me your PoC.

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I didn't compile it yet but if it's just a few extra options, they could be hidden unless a floating point type is selected.
I'm fine with having it as a separate tool too but functionality-wise it would fit in the Numeric search tool

auto &settings = this->m_searchSettings.approximate;

mode = SearchSettings::Mode::Approximate;

this->m_settingsValid = true;

const std::array<std::string, 2> InputTypes = {
"hex.builtin.common.type.f32"_lang,
"hex.builtin.common.type.f64"_lang
};

if (ImGui::BeginCombo("hex.builtin.common.type"_lang, InputTypes[std::to_underlying(settings.type)].c_str())) {
for (size_t i = 0; i < InputTypes.size(); i++) {
auto type = static_cast<SearchSettings::Approximate::Type>(i);

if (ImGui::Selectable(InputTypes[i].c_str(), type == settings.type)) {
settings.type = type;
}
}
ImGui::EndCombo();
}

{
int selection = [&] {
switch (settings.endian) {
default:
case std::endian::little: return 0;
case std::endian::big: return 1;
}
}();

std::array options = { "hex.builtin.common.little"_lang, "hex.builtin.common.big"_lang };
if (ImGui::SliderInt("hex.builtin.common.endian"_lang, &selection, 0, options.size() - 1, options[selection], ImGuiSliderFlags_NoInput)) {
switch (selection) {
default:
case 0: settings.endian = std::endian::little; break;
case 1: settings.endian = std::endian::big; break;
}
}
}

ImGui::Checkbox("hex.builtin.view.find.approximate.aligned"_lang, &settings.aligned);
ImGui::Checkbox("hex.builtin.view.find.approximate.ignore_zeroes"_lang, &settings.ignore_zeroes);

ImGui::EndTabItem();
}

ImGui::EndTabBar();
}
Expand Down
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