forked from OSchip/llvm-project
102 lines
3.4 KiB
C++
102 lines
3.4 KiB
C++
//==-- proto_to_cxx.cpp - Protobuf-C++ conversion --------------------------==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements functions for converting between protobufs and C++.
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//
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//===----------------------------------------------------------------------===//
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#include "proto_to_cxx.h"
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#include "cxx_proto.pb.h"
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#include <ostream>
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#include <sstream>
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namespace clang_fuzzer {
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// Forward decls.
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std::ostream &operator<<(std::ostream &os, const BinaryOp &x);
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std::ostream &operator<<(std::ostream &os, const StatementSeq &x);
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// Proto to C++.
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std::ostream &operator<<(std::ostream &os, const Const &x) {
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return os << "(" << x.val() << ")";
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}
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std::ostream &operator<<(std::ostream &os, const VarRef &x) {
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return os << "a[" << (static_cast<uint32_t>(x.varnum()) % 100) << "]";
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}
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std::ostream &operator<<(std::ostream &os, const Lvalue &x) {
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return os << x.varref();
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}
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std::ostream &operator<<(std::ostream &os, const Rvalue &x) {
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if (x.has_varref()) return os << x.varref();
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if (x.has_cons()) return os << x.cons();
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if (x.has_binop()) return os << x.binop();
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return os << "1";
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}
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std::ostream &operator<<(std::ostream &os, const BinaryOp &x) {
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os << "(" << x.left();
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switch (x.op()) {
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case BinaryOp::PLUS: os << "+"; break;
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case BinaryOp::MINUS: os << "-"; break;
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case BinaryOp::MUL: os << "*"; break;
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case BinaryOp::DIV: os << "/"; break;
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case BinaryOp::MOD: os << "%"; break;
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case BinaryOp::XOR: os << "^"; break;
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case BinaryOp::AND: os << "&"; break;
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case BinaryOp::OR: os << "|"; break;
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case BinaryOp::EQ: os << "=="; break;
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case BinaryOp::NE: os << "!="; break;
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case BinaryOp::LE: os << "<="; break;
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case BinaryOp::GE: os << ">="; break;
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case BinaryOp::LT: os << "<"; break;
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case BinaryOp::GT: os << ">"; break;
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}
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return os << x.right() << ")";
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}
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std::ostream &operator<<(std::ostream &os, const AssignmentStatement &x) {
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return os << x.lvalue() << "=" << x.rvalue() << ";\n";
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}
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std::ostream &operator<<(std::ostream &os, const IfElse &x) {
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return os << "if (" << x.cond() << "){\n"
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<< x.if_body() << "} else { \n"
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<< x.else_body() << "}\n";
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}
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std::ostream &operator<<(std::ostream &os, const While &x) {
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return os << "while (" << x.cond() << "){\n" << x.body() << "}\n";
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}
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std::ostream &operator<<(std::ostream &os, const Statement &x) {
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if (x.has_assignment()) return os << x.assignment();
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if (x.has_ifelse()) return os << x.ifelse();
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if (x.has_while_loop()) return os << x.while_loop();
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return os << "(void)0;\n";
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}
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std::ostream &operator<<(std::ostream &os, const StatementSeq &x) {
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for (auto &st : x.statements()) os << st;
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return os;
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}
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std::ostream &operator<<(std::ostream &os, const Function &x) {
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return os << "void foo(int *a) {\n" << x.statements() << "}\n";
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}
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// ---------------------------------
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std::string FunctionToString(const Function &input) {
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std::ostringstream os;
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os << input;
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return os.str();
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}
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std::string ProtoToCxx(const uint8_t *data, size_t size) {
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Function message;
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if (!message.ParsePartialFromArray(data, size))
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return "#error invalid proto\n";
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return FunctionToString(message);
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}
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} // namespace clang_fuzzer
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