2020-11-10 21:31:04 +01:00
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#include <random>
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#include "views/view_pattern.hpp"
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#include "utils.hpp"
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namespace hex {
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ViewPattern::ViewPattern(std::vector<Highlight> &highlights) : View(), m_highlights(highlights) {
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this->m_buffer = new char[0xFFFFFF];
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std::memset(this->m_buffer, 0x00, 0xFFFFFF);
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}
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ViewPattern::~ViewPattern() {
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delete[] this->m_buffer;
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}
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void ViewPattern::createMenu() {
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if (ImGui::BeginMenu("File")) {
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if (ImGui::MenuItem("Load pattern...")) {
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auto filePath = openFileDialog();
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if (filePath.has_value()) {
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FILE *file = fopen(filePath->c_str(), "r+b");
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fseek(file, 0, SEEK_END);
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size_t size = ftell(file);
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rewind(file);
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if (size > 0xFF'FFFF)
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return;
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fread(this->m_buffer, size, 1, file);
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fclose(file);
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this->parsePattern(this->m_buffer);
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}
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}
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ImGui::EndMenu();
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}
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2020-11-11 09:22:55 +01:00
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if (ImGui::BeginMenu("View")) {
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2020-11-10 21:31:04 +01:00
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ImGui::MenuItem("Pattern View", "", &this->m_windowOpen);
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ImGui::EndMenu();
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}
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}
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void ViewPattern::createView() {
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if (!this->m_windowOpen)
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return;
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ImGui::Begin("Pattern", &this->m_windowOpen, ImGuiWindowFlags_None);
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ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
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ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0, 0));
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auto size = ImGui::GetWindowSize();
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size.y -= 50;
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ImGui::InputTextMultiline("Pattern", this->m_buffer, 0xFFFF, size, ImGuiInputTextFlags_AllowTabInput | ImGuiInputTextFlags_CallbackEdit,
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[](ImGuiInputTextCallbackData* data) -> int {
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auto _this = static_cast<ViewPattern*>(data->UserData);
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_this->parsePattern(data->Buf);
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return 0;
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}, this
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);
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ImGui::PopStyleVar(2);
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ImGui::End();
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}
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void ViewPattern::setHighlight(u64 offset, size_t size, std::string name, u32 color) {
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if (color == 0)
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color = std::mt19937(std::random_device()())();
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color &= ~0xFF00'0000;
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color |= 0x5000'0000;
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this->m_highlights.emplace_back(offset, size, color, name);
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}
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template<std::derived_from<lang::ASTNode> T>
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static std::vector<T*> findNodes(const lang::ASTNode::Type type, const std::vector<lang::ASTNode*> &nodes) {
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std::vector<T*> result;
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for (const auto & node : nodes)
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if (node->getType() == type)
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result.push_back(static_cast<T*>(node));
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return result;
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}
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void ViewPattern::parsePattern(char *buffer) {
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static hex::lang::Lexer lexer;
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static hex::lang::Parser parser;
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this->m_highlights.clear();
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auto [lexResult, tokens] = lexer.lex(buffer);
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if (lexResult.failed()) {
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return;
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}
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auto [parseResult, ast] = parser.parse(tokens);
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if (parseResult.failed()) {
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for(auto &node : ast) delete node;
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return;
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}
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for (auto &varNode : findNodes<lang::ASTNodeVariableDecl>(lang::ASTNode::Type::VariableDecl, ast)) {
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if (!varNode->getOffset().has_value())
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continue;
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u64 offset = varNode->getOffset().value();
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if (varNode->getVariableType() != lang::Token::TypeToken::Type::CustomType) {
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this->setHighlight(offset, static_cast<u32>(varNode->getVariableType()) >> 4, varNode->getVariableName());
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} else {
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for (auto &structNode : findNodes<lang::ASTNodeStruct>(lang::ASTNode::Type::Struct, ast))
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if (varNode->getCustomVariableTypeName() == structNode->getName())
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if (this->highlightStruct(ast, structNode, offset) == -1)
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this->m_highlights.clear();
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for (auto &usingNode : findNodes<lang::ASTNodeTypeDecl>(lang::ASTNode::Type::TypeDecl, ast))
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if (varNode->getCustomVariableTypeName() == usingNode->getTypeName())
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if (this->highlightUsingDecls(ast, usingNode, varNode, offset) == -1)
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this->m_highlights.clear();
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}
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}
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for(auto &node : ast) delete node;
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}
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s32 ViewPattern::highlightUsingDecls(std::vector<lang::ASTNode*> &ast, lang::ASTNodeTypeDecl* currTypeDeclNode, lang::ASTNodeVariableDecl* currVarDecl, u64 offset) {
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if (currTypeDeclNode->getAssignedType() != lang::Token::TypeToken::Type::CustomType) {
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size_t size = static_cast<u32>(currTypeDeclNode->getAssignedType()) >> 4;
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this->setHighlight(offset, size, currVarDecl->getVariableName());
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offset += size;
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} else {
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bool foundType = false;
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for (auto &structNode : findNodes<lang::ASTNodeStruct>(lang::ASTNode::Type::Struct, ast))
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if (structNode->getName() == currTypeDeclNode->getAssignedCustomTypeName()) {
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offset = this->highlightStruct(ast, structNode, offset);
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foundType = true;
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break;
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}
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for (auto &typeDeclNode : findNodes<lang::ASTNodeTypeDecl>(lang::ASTNode::Type::TypeDecl, ast))
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if (typeDeclNode->getTypeName() == currTypeDeclNode->getAssignedCustomTypeName()) {
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offset = this->highlightUsingDecls(ast, typeDeclNode, currVarDecl, offset);
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foundType = true;
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break;
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}
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if (!foundType)
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return -1;
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}
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return offset;
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}
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s32 ViewPattern::highlightStruct(std::vector<lang::ASTNode*> &ast, lang::ASTNodeStruct* currStructNode, u64 offset) {
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u64 startOffset = offset;
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for (auto &node : currStructNode->getNodes()) {
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auto var = static_cast<lang::ASTNodeVariableDecl*>(node);
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if (var->getVariableType() != lang::Token::TypeToken::Type::CustomType) {
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size_t size = static_cast<u32>(var->getVariableType()) >> 4;
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this->setHighlight(offset, size, var->getVariableName());
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offset += size;
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} else {
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bool foundType = false;
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for (auto &structNode : findNodes<lang::ASTNodeStruct>(lang::ASTNode::Type::Struct, ast))
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if (structNode->getName() == var->getCustomVariableTypeName()) {
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auto size = this->highlightStruct(ast, structNode, offset);
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if (size == -1)
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return -1;
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offset += size;
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foundType = true;
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break;
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}
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for (auto &typeDeclNode : findNodes<lang::ASTNodeTypeDecl>(lang::ASTNode::Type::TypeDecl, ast))
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if (typeDeclNode->getTypeName() == var->getCustomVariableTypeName()) {
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auto size = this->highlightUsingDecls(ast, typeDeclNode, var, offset);
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if (size == -1)
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return -1;
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offset = size;
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foundType = true;
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break;
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}
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if (!foundType)
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return -1;
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}
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}
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return offset - startOffset;
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}
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}
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