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ImHex/source/views/view_pattern.cpp

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