mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-06-28 16:41:01 +03:00
123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
/*
|
|
* Copyright (c) 2015-2017, Intel Corporation
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief Component tree analysis that checks that references (such as
|
|
* back-refs, conditionals) have valid referents.
|
|
*/
|
|
#include "check_refs.h"
|
|
#include "ComponentBackReference.h"
|
|
#include "ComponentCondReference.h"
|
|
#include "ConstComponentVisitor.h"
|
|
#include "parse_error.h"
|
|
#include "util/container.h"
|
|
#include "util/flat_containers.h"
|
|
|
|
#include <sstream>
|
|
|
|
using namespace std;
|
|
|
|
namespace ue2 {
|
|
|
|
/**
|
|
* \brief Visitor that checks the validity of references against a known list
|
|
* of indices and labels.
|
|
*/
|
|
class ReferenceVisitor: public DefaultConstComponentVisitor {
|
|
private:
|
|
const size_t num_ids;
|
|
const flat_set<string> &names;
|
|
|
|
public:
|
|
ReferenceVisitor(size_t num_groups, const flat_set<string> &targets)
|
|
: num_ids(num_groups), names(targets) {}
|
|
|
|
~ReferenceVisitor() override;
|
|
|
|
void invalid_index(const char *component, unsigned id) {
|
|
assert(component);
|
|
ostringstream str;
|
|
str << "Invalid " << component << " to expression " << id << ".";
|
|
throw ParseError(str.str());
|
|
}
|
|
|
|
void invalid_label(const char *component, const std::string &label) {
|
|
assert(component);
|
|
ostringstream str;
|
|
str << "Invalid " << component << " to label '" << label << "'.";
|
|
throw ParseError(str.str());
|
|
}
|
|
|
|
using DefaultConstComponentVisitor::pre;
|
|
|
|
void pre(const ComponentBackReference &c) override {
|
|
if (c.ref_id) {
|
|
if (c.ref_id >= num_ids) {
|
|
invalid_index("back reference", c.ref_id);
|
|
}
|
|
} else {
|
|
if (!contains(names, c.name)) {
|
|
invalid_label("back reference", c.name);
|
|
}
|
|
}
|
|
}
|
|
|
|
void pre(const ComponentCondReference &c) override {
|
|
switch (c.kind) {
|
|
case ComponentCondReference::CONDITION_NUMBER:
|
|
if (c.ref_id >= num_ids) {
|
|
invalid_index("conditional reference", c.ref_id);
|
|
}
|
|
break;
|
|
case ComponentCondReference::CONDITION_NAME:
|
|
if (c.ref_name == "DEFINE") {
|
|
// The string "DEFINE" is a special "always false" condition
|
|
// used to define subroutines.
|
|
break;
|
|
}
|
|
if (!contains(names, c.ref_name)) {
|
|
invalid_label("conditional reference", c.ref_name);
|
|
}
|
|
break;
|
|
case ComponentCondReference::CONDITION_ASSERTION:
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
// Out-of-line destructor to silence weak vtable warnings.
|
|
ReferenceVisitor::~ReferenceVisitor() {}
|
|
|
|
void checkReferences(const Component &root, unsigned int groupIndices,
|
|
const flat_set<std::string> &groupNames) {
|
|
ReferenceVisitor vis(groupIndices, groupNames);
|
|
root.accept(vis);
|
|
}
|
|
|
|
} // namespace ue2
|