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patterns: Added continue and break statements to arrays of structs

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This commit is contained in:
WerWolv 2021-12-30 18:31:24 +01:00
parent 3ce0f8f4a8
commit 0884025b82
2 changed files with 77 additions and 21 deletions
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94
plugins/libimhex/include/hex/pattern_language/ast_node.hpp
View File

@ -561,7 +561,10 @@ namespace hex::pl {
for (auto &statement : other.m_body)
this->m_body.push_back(statement->clone());
this->m_postExpression = other.m_postExpression->clone();
if (other.m_postExpression != nullptr)
this->m_postExpression = other.m_postExpression->clone();
else
this->m_postExpression = nullptr;
}
[[nodiscard]] ASTNode* clone() const override {
@ -974,6 +977,13 @@ namespace hex::pl {
evaluator->handleAbort();
};
auto discardEntry = [&] {
delete entries.back();
entries.pop_back();
entryIndex--;
};
if (this->m_size != nullptr) {
auto sizeNode = this->m_size->evaluate(evaluator);
ON_SCOPE_EXIT { delete sizeNode; };
@ -990,9 +1000,18 @@ namespace hex::pl {
LogConsole::abortEvaluation(hex::format("array grew past set limit of {}", limit), this);
for (u64 i = 0; i < entryCount; i++) {
auto pattern = this->m_type->createPatterns(evaluator).front();
auto patterns = this->m_type->createPatterns(evaluator);
addEntry(pattern);
if (!patterns.empty())
addEntry(patterns.front());
auto ctrlFlow = evaluator->getCurrentControlFlowStatement();
if (ctrlFlow == ControlFlowStatement::Break)
break;
else if (ctrlFlow == ControlFlowStatement::Continue) {
discardEntry();
continue;
}
}
} else if (auto whileStatement = dynamic_cast<ASTNodeWhileStatement*>(sizeNode)) {
while (whileStatement->evaluateCondition(evaluator)) {
@ -1000,9 +1019,18 @@ namespace hex::pl {
if (entryIndex > limit)
LogConsole::abortEvaluation(hex::format("array grew past set limit of {}", limit), this);
auto pattern = this->m_type->createPatterns(evaluator).front();
auto patterns = this->m_type->createPatterns(evaluator);
addEntry(pattern);
if (!patterns.empty())
addEntry(patterns.front());
auto ctrlFlow = evaluator->getCurrentControlFlowStatement();
if (ctrlFlow == ControlFlowStatement::Break)
break;
else if (ctrlFlow == ControlFlowStatement::Continue) {
discardEntry();
continue;
}
}
}
} else {
@ -1011,26 +1039,39 @@ namespace hex::pl {
if (entryIndex > limit)
LogConsole::abortEvaluation(hex::format("array grew past set limit of {}", limit), this);
auto pattern = this->m_type->createPatterns(evaluator).front();
std::vector<u8> buffer(pattern->getSize());
auto patterns = this->m_type->createPatterns(evaluator);
if (evaluator->dataOffset() >= evaluator->getProvider()->getActualSize() - buffer.size()) {
delete pattern;
LogConsole::abortEvaluation("reached end of file before finding end of unsized array", this);
}
if (!patterns.empty()) {
auto pattern = patterns.front();
addEntry(pattern);
std::vector<u8> buffer(pattern->getSize());
evaluator->getProvider()->read(evaluator->dataOffset() - pattern->getSize(), buffer.data(), buffer.size());
bool reachedEnd = true;
for (u8 &byte : buffer) {
if (byte != 0x00) {
reachedEnd = false;
break;
if (evaluator->dataOffset() >= evaluator->getProvider()->getActualSize() - buffer.size()) {
delete pattern;
LogConsole::abortEvaluation("reached end of file before finding end of unsized array", this);
}
}
if (reachedEnd) break;
addEntry(pattern);
auto ctrlFlow = evaluator->getCurrentControlFlowStatement();
if (ctrlFlow == ControlFlowStatement::Break)
break;
else if (ctrlFlow == ControlFlowStatement::Continue) {
discardEntry();
continue;
}
evaluator->getProvider()->read(evaluator->dataOffset() - pattern->getSize(), buffer.data(), buffer.size());
bool reachedEnd = true;
for (u8 &byte : buffer) {
if (byte != 0x00) {
reachedEnd = false;
break;
}
}
if (reachedEnd) break;
}
}
}
@ -2044,7 +2085,11 @@ namespace hex::pl {
ASTNodeControlFlowStatement(const ASTNodeControlFlowStatement &other) : ASTNode(other) {
this->m_type = other.m_type;
this->m_rvalue = other.m_rvalue->clone();
if (other.m_rvalue != nullptr)
this->m_rvalue = other.m_rvalue->clone();
else
this->m_rvalue = nullptr;
}
[[nodiscard]] ASTNode* clone() const override {
@ -2059,6 +2104,13 @@ namespace hex::pl {
return this->m_rvalue;
}
[[nodiscard]] std::vector<PatternData*> createPatterns(Evaluator *evaluator) const override {
this->execute(evaluator);
return { };
}
FunctionResult execute(Evaluator *evaluator) const override {
auto returnValue = this->getReturnValue();

4
plugins/libimhex/source/pattern_language/parser.cpp
View File

@ -880,6 +880,10 @@ namespace hex::pl {
return parseConditional();
else if (MATCHES(sequence(SEPARATOR_ENDOFPROGRAM)))
throwParseError("unexpected end of program", -2);
else if (MATCHES(sequence(KEYWORD_BREAK)))
member = new ASTNodeControlFlowStatement(ControlFlowStatement::Break, nullptr);
else if (MATCHES(sequence(KEYWORD_CONTINUE)))
member = new ASTNodeControlFlowStatement(ControlFlowStatement::Continue, nullptr);
else
throwParseError("invalid struct member", 0);