384 lines
11 KiB
C++
384 lines
11 KiB
C++
#include <hex/providers/provider.hpp>
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#include <hex.hpp>
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#include <hex/api/event.hpp>
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#include <cmath>
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#include <cstring>
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#include <map>
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#include <optional>
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#include <hex/helpers/magic.hpp>
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#include <wolv/io/file.hpp>
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namespace hex::prv {
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namespace {
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u32 s_idCounter = 0;
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}
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Provider::Provider() : m_id(s_idCounter++) {
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this->m_patches.emplace_back();
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this->m_currPatches = this->m_patches.begin();
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}
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Provider::~Provider() {
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this->m_overlays.clear();
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if (auto selection = ImHexApi::HexEditor::getSelection(); selection.has_value() && selection->provider == this)
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EventManager::post<EventRegionSelected>(ImHexApi::HexEditor::ProviderRegion { { 0x00, 0x00 }, nullptr });
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}
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void Provider::read(u64 offset, void *buffer, size_t size, bool overlays) {
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hex::unused(overlays);
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this->readRaw(offset - this->getBaseAddress(), buffer, size);
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}
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void Provider::write(u64 offset, const void *buffer, size_t size) {
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this->writeRaw(offset - this->getBaseAddress(), buffer, size);
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this->markDirty();
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}
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void Provider::save() {
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EventManager::post<EventProviderSaved>(this);
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}
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void Provider::saveAs(const std::fs::path &path) {
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wolv::io::File file(path, wolv::io::File::Mode::Create);
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if (file.isValid()) {
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std::vector<u8> buffer(std::min<size_t>(0xFF'FFFF, this->getActualSize()), 0x00);
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size_t bufferSize = 0;
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for (u64 offset = 0; offset < this->getActualSize(); offset += bufferSize) {
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bufferSize = buffer.size();
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auto [region, valid] = this->getRegionValidity(offset + this->getBaseAddress());
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if (!valid)
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offset = region.getEndAddress() + 1;
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auto [newRegion, newValid] = this->getRegionValidity(offset + this->getBaseAddress());
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bufferSize = std::min<size_t>(bufferSize, (newRegion.getEndAddress() - offset) + 1);
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bufferSize = std::min<size_t>(bufferSize, this->getActualSize() - offset);
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this->read(offset + this->getBaseAddress(), buffer.data(), bufferSize, true);
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file.writeBuffer(buffer.data(), bufferSize);
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}
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for (auto &[patchAddress, patch] : getPatches()) {
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file.seek(patchAddress - this->getBaseAddress());
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file.writeBuffer(&patch, 1);
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}
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EventManager::post<EventProviderSaved>(this);
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}
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}
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void Provider::resize(size_t newSize) {
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hex::unused(newSize);
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this->markDirty();
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}
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void Provider::insert(u64 offset, size_t size) {
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auto &patches = getPatches();
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std::vector<std::pair<u64, u8>> patchesToMove;
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for (auto &[address, value] : patches) {
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if (address > offset)
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patchesToMove.emplace_back(address, value);
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}
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for (const auto &[address, value] : patchesToMove)
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patches.erase(address);
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for (const auto &[address, value] : patchesToMove)
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patches.insert({ address + size, value });
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this->markDirty();
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}
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void Provider::remove(u64 offset, size_t size) {
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auto &patches = getPatches();
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std::vector<std::pair<u64, u8>> patchesToMove;
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for (auto &[address, value] : patches) {
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if (address > offset)
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patchesToMove.emplace_back(address, value);
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}
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for (const auto &[address, value] : patchesToMove)
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patches.erase(address);
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for (const auto &[address, value] : patchesToMove)
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patches.insert({ address - size, value });
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this->markDirty();
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}
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void Provider::applyOverlays(u64 offset, void *buffer, size_t size) {
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for (auto &overlay : this->m_overlays) {
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auto overlayOffset = overlay->getAddress();
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auto overlaySize = overlay->getSize();
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i128 overlapMin = std::max(offset, overlayOffset);
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i128 overlapMax = std::min(offset + size, overlayOffset + overlaySize);
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if (overlapMax > overlapMin)
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std::memcpy(static_cast<u8 *>(buffer) + std::max<i128>(0, overlapMin - offset), overlay->getData().data() + std::max<i128>(0, overlapMin - overlayOffset), overlapMax - overlapMin);
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}
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}
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std::map<u64, u8> &Provider::getPatches() {
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return *this->m_currPatches;
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}
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const std::map<u64, u8> &Provider::getPatches() const {
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return *this->m_currPatches;
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}
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void Provider::applyPatches() {
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if (!this->isWritable())
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return;
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this->m_patches.emplace_back();
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for (auto &[patchAddress, patch] : getPatches()) {
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u8 value = 0x00;
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this->readRaw(patchAddress - this->getBaseAddress(), &value, 1);
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this->m_patches.back().insert({ patchAddress, value });
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}
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for (auto &[patchAddress, patch] : getPatches()) {
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this->writeRaw(patchAddress - this->getBaseAddress(), &patch, 1);
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}
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this->markDirty();
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this->m_patches.emplace_back();
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this->m_currPatches = std::prev(this->m_patches.end());
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}
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Overlay *Provider::newOverlay() {
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return this->m_overlays.emplace_back(std::make_unique<Overlay>()).get();
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}
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void Provider::deleteOverlay(Overlay *overlay) {
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this->m_overlays.remove_if([overlay](const auto &item) {
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return item.get() == overlay;
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});
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}
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const std::list<std::unique_ptr<Overlay>> &Provider::getOverlays() {
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return this->m_overlays;
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}
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size_t Provider::getPageSize() const {
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return this->m_pageSize;
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}
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void Provider::setPageSize(size_t pageSize) {
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if (pageSize > MaxPageSize)
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pageSize = MaxPageSize;
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this->m_pageSize = pageSize;
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}
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u32 Provider::getPageCount() const {
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return (this->getActualSize() / this->getPageSize()) + (this->getActualSize() % this->getPageSize() != 0 ? 1 : 0);
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}
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u32 Provider::getCurrentPage() const {
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return this->m_currPage;
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}
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void Provider::setCurrentPage(u32 page) {
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if (page < getPageCount())
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this->m_currPage = page;
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}
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void Provider::setBaseAddress(u64 address) {
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this->m_baseAddress = address;
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this->markDirty();
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}
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u64 Provider::getBaseAddress() const {
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return this->m_baseAddress;
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}
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u64 Provider::getCurrentPageAddress() const {
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return this->getPageSize() * this->getCurrentPage();
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}
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size_t Provider::getSize() const {
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return std::min(this->getActualSize() - this->getPageSize() * this->m_currPage, this->getPageSize());
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}
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std::optional<u32> Provider::getPageOfAddress(u64 address) const {
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u32 page = std::floor((address - this->getBaseAddress()) / double(this->getPageSize()));
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if (page >= this->getPageCount())
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return std::nullopt;
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return page;
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}
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std::vector<Provider::Description> Provider::getDataDescription() const {
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return { };
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}
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void Provider::addPatch(u64 offset, const void *buffer, size_t size, bool createUndo) {
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if (createUndo) {
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// Delete all patches after the current one if a modification is made while
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// the current patch list is not at the end of the undo stack
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if (std::next(this->m_currPatches) != this->m_patches.end())
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this->m_patches.erase(std::next(this->m_currPatches), this->m_patches.end());
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createUndoPoint();
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}
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for (u64 i = 0; i < size; i++) {
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u8 patch = reinterpret_cast<const u8 *>(buffer)[i];
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u8 originalValue = 0x00;
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this->readRaw((offset + i) - this->getBaseAddress(), &originalValue, sizeof(u8));
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if (patch == originalValue)
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getPatches().erase(offset + i);
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else
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getPatches()[offset + i] = patch;
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EventManager::post<EventPatchCreated>(offset, originalValue, patch);
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}
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this->markDirty();
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}
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void Provider::createUndoPoint() {
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this->m_patches.push_back(getPatches());
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this->m_currPatches = std::prev(this->m_patches.end());
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}
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void Provider::undo() {
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if (canUndo())
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this->m_currPatches--;
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}
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void Provider::redo() {
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if (canRedo())
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this->m_currPatches++;
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}
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bool Provider::canUndo() const {
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return this->m_currPatches != this->m_patches.begin();
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}
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bool Provider::canRedo() const {
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return std::next(this->m_currPatches) != this->m_patches.end();
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}
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bool Provider::hasFilePicker() const {
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return false;
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}
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bool Provider::handleFilePicker() {
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return false;
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}
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bool Provider::hasLoadInterface() const {
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return false;
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}
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bool Provider::hasInterface() const {
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return false;
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}
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bool Provider::drawLoadInterface() {
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return true;
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}
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void Provider::drawInterface() {
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}
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nlohmann::json Provider::storeSettings(nlohmann::json settings) const {
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settings["displayName"] = this->getName();
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settings["type"] = this->getTypeName();
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settings["baseAddress"] = this->m_baseAddress;
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settings["currPage"] = this->m_currPage;
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return settings;
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}
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void Provider::loadSettings(const nlohmann::json &settings) {
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this->m_baseAddress = settings["baseAddress"];
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this->m_currPage = settings["currPage"];
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}
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std::pair<Region, bool> Provider::getRegionValidity(u64 address) const {
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if ((address - this->getBaseAddress()) > this->getActualSize())
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return { Region::Invalid(), false };
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bool insideValidRegion = false;
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std::optional<u64> nextRegionAddress;
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for (const auto &overlay : this->m_overlays) {
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Region overlayRegion = { overlay->getAddress(), overlay->getSize() };
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if (!nextRegionAddress.has_value() || overlay->getAddress() < nextRegionAddress) {
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nextRegionAddress = overlayRegion.getStartAddress();
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}
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if (Region { address, 1 }.overlaps(overlayRegion)) {
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insideValidRegion = true;
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}
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}
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for (const auto &[patchAddress, value] : this->m_patches.back()) {
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if (!nextRegionAddress.has_value() || patchAddress < nextRegionAddress)
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nextRegionAddress = patchAddress;
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if (address == patchAddress)
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insideValidRegion = true;
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}
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if (!nextRegionAddress.has_value())
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return { Region::Invalid(), false };
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else
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return { Region { address, *nextRegionAddress - address }, insideValidRegion };
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}
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u32 Provider::getID() const {
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return this->m_id;
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}
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void Provider::setID(u32 id) {
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this->m_id = id;
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if (id > s_idCounter)
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s_idCounter = id + 1;
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}
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[[nodiscard]] std::variant<std::string, i128> Provider::queryInformation(const std::string &category, const std::string &) {
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if (category == "mime")
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return magic::getMIMEType(this);
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else if (category == "description")
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return magic::getDescription(this);
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else if (category == "provider_type")
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return this->getTypeName();
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else
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return 0;
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}
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[[nodiscard]] bool Provider::isDumpable() const {
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return true;
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}
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}
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