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1061 lines
33 KiB
1061 lines
33 KiB
/*
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* Copyright (C) 2019, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "aidl_language.h"
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#include "aidl_typenames.h"
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#include "logging.h"
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#include <stdlib.h>
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#include <algorithm>
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#include <iostream>
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#include <limits>
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#include <memory>
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#include <android-base/parsedouble.h>
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#include <android-base/parseint.h>
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#include <android-base/strings.h>
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using android::base::ConsumeSuffix;
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using android::base::EndsWith;
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using android::base::Join;
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using android::base::StartsWith;
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using std::string;
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using std::unique_ptr;
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using std::vector;
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template <typename T>
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constexpr int CLZ(T x) {
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// __builtin_clz(0) is undefined
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if (x == 0) return sizeof(T) * 8;
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return (sizeof(T) == sizeof(uint64_t)) ? __builtin_clzl(x) : __builtin_clz(x);
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}
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template <typename T>
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class OverflowGuard {
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public:
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OverflowGuard(T value) : mValue(value) {}
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bool Overflowed() const { return mOverflowed; }
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T operator+() { return +mValue; }
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T operator-() {
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if (isMin()) {
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mOverflowed = true;
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return 0;
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}
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return -mValue;
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}
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T operator!() { return !mValue; }
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T operator~() { return ~mValue; }
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T operator+(T o) {
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T out;
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mOverflowed = __builtin_add_overflow(mValue, o, &out);
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return out;
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}
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T operator-(T o) {
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T out;
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mOverflowed = __builtin_sub_overflow(mValue, o, &out);
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return out;
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}
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T operator*(T o) {
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T out;
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#ifdef _WIN32
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// ___mulodi4 not on windows https://bugs.llvm.org/show_bug.cgi?id=46669
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// we should still get an error here from ubsan, but the nice error
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// is needed on linux for aidl_parser_fuzzer, where we are more
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// concerned about overflows elsewhere in the compiler in addition to
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// those in interfaces.
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out = mValue * o;
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#else
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mOverflowed = __builtin_mul_overflow(mValue, o, &out);
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#endif
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return out;
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}
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T operator/(T o) {
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if (o == 0 || (isMin() && o == -1)) {
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mOverflowed = true;
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return 0;
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}
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return mValue / o;
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}
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T operator%(T o) {
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if (o == 0 || (isMin() && o == -1)) {
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mOverflowed = true;
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return 0;
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}
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return mValue % o;
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}
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T operator|(T o) { return mValue | o; }
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T operator^(T o) { return mValue ^ o; }
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T operator&(T o) { return mValue & o; }
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T operator<(T o) { return mValue < o; }
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T operator>(T o) { return mValue > o; }
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T operator<=(T o) { return mValue <= o; }
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T operator>=(T o) { return mValue >= o; }
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T operator==(T o) { return mValue == o; }
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T operator!=(T o) { return mValue != o; }
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T operator>>(T o) {
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if (o < 0 || o >= static_cast<T>(sizeof(T) * 8) || mValue < 0) {
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mOverflowed = true;
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return 0;
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}
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return mValue >> o;
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}
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T operator<<(T o) {
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if (o < 0 || mValue < 0 || o > CLZ(mValue) || o >= static_cast<T>(sizeof(T) * 8)) {
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mOverflowed = true;
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return 0;
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}
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return mValue << o;
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}
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T operator||(T o) { return mValue || o; }
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T operator&&(T o) { return mValue && o; }
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private:
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bool isMin() { return mValue == std::numeric_limits<T>::min(); }
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T mValue;
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bool mOverflowed = false;
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};
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template <typename T>
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bool processGuard(const OverflowGuard<T>& guard, const AidlConstantValue& context) {
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if (guard.Overflowed()) {
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AIDL_ERROR(context) << "Constant expression computation overflows.";
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return false;
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}
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return true;
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}
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// TODO: factor out all these macros
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#define SHOULD_NOT_REACH() AIDL_FATAL(AIDL_LOCATION_HERE) << "Should not reach."
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#define OPEQ(__y__) (string(op_) == string(__y__))
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#define COMPUTE_UNARY(T, __op__) \
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if (op == string(#__op__)) { \
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OverflowGuard<T> guard(val); \
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*out = __op__ guard; \
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return processGuard(guard, context); \
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}
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#define COMPUTE_BINARY(T, __op__) \
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if (op == string(#__op__)) { \
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OverflowGuard<T> guard(lval); \
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*out = guard __op__ rval; \
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return processGuard(guard, context); \
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}
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#define OP_IS_BIN_ARITHMETIC (OPEQ("+") || OPEQ("-") || OPEQ("*") || OPEQ("/") || OPEQ("%"))
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#define OP_IS_BIN_BITFLIP (OPEQ("|") || OPEQ("^") || OPEQ("&"))
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#define OP_IS_BIN_COMP \
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(OPEQ("<") || OPEQ(">") || OPEQ("<=") || OPEQ(">=") || OPEQ("==") || OPEQ("!="))
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#define OP_IS_BIN_SHIFT (OPEQ(">>") || OPEQ("<<"))
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#define OP_IS_BIN_LOGICAL (OPEQ("||") || OPEQ("&&"))
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// NOLINT to suppress missing parentheses warnings about __def__.
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#define SWITCH_KIND(__cond__, __action__, __def__) \
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switch (__cond__) { \
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case Type::BOOLEAN: \
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__action__(bool); \
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case Type::INT8: \
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__action__(int8_t); \
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case Type::INT32: \
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__action__(int32_t); \
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case Type::INT64: \
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__action__(int64_t); \
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default: \
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__def__; /* NOLINT */ \
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}
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template <class T>
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bool handleUnary(const AidlConstantValue& context, const string& op, T val, int64_t* out) {
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COMPUTE_UNARY(T, +)
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COMPUTE_UNARY(T, -)
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COMPUTE_UNARY(T, !)
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COMPUTE_UNARY(T, ~)
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AIDL_FATAL(context) << "Could not handleUnary for " << op << " " << val;
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return false;
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}
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template <>
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bool handleUnary<bool>(const AidlConstantValue& context, const string& op, bool val, int64_t* out) {
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COMPUTE_UNARY(bool, +)
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COMPUTE_UNARY(bool, -)
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COMPUTE_UNARY(bool, !)
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if (op == "~") {
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AIDL_ERROR(context) << "Bitwise negation of a boolean expression is always true.";
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return false;
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}
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AIDL_FATAL(context) << "Could not handleUnary for " << op << " " << val;
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return false;
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}
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template <class T>
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bool handleBinaryCommon(const AidlConstantValue& context, T lval, const string& op, T rval,
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int64_t* out) {
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COMPUTE_BINARY(T, +)
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COMPUTE_BINARY(T, -)
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COMPUTE_BINARY(T, *)
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COMPUTE_BINARY(T, /)
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COMPUTE_BINARY(T, %)
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COMPUTE_BINARY(T, |)
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COMPUTE_BINARY(T, ^)
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COMPUTE_BINARY(T, &)
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// comparison operators: return 0 or 1 by nature.
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COMPUTE_BINARY(T, ==)
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COMPUTE_BINARY(T, !=)
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COMPUTE_BINARY(T, <)
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COMPUTE_BINARY(T, >)
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COMPUTE_BINARY(T, <=)
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COMPUTE_BINARY(T, >=)
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AIDL_FATAL(context) << "Could not handleBinaryCommon for " << lval << " " << op << " " << rval;
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return false;
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}
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template <class T>
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bool handleShift(const AidlConstantValue& context, T lval, const string& op, T rval, int64_t* out) {
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// just cast rval to int64_t and it should fit.
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COMPUTE_BINARY(T, >>)
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COMPUTE_BINARY(T, <<)
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AIDL_FATAL(context) << "Could not handleShift for " << lval << " " << op << " " << rval;
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return false;
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}
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bool handleLogical(const AidlConstantValue& context, bool lval, const string& op, bool rval,
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int64_t* out) {
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COMPUTE_BINARY(bool, ||);
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COMPUTE_BINARY(bool, &&);
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AIDL_FATAL(context) << "Could not handleLogical for " << lval << " " << op << " " << rval;
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return false;
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}
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bool ParseFloating(std::string_view sv, double* parsed) {
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// float literal should be parsed successfully.
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android::base::ConsumeSuffix(&sv, "f");
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return android::base::ParseDouble(std::string(sv).data(), parsed);
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}
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bool ParseFloating(std::string_view sv, float* parsed) {
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// we only care about float literal (with suffix "f").
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if (!android::base::ConsumeSuffix(&sv, "f")) {
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return false;
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}
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return android::base::ParseFloat(std::string(sv).data(), parsed);
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}
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bool AidlUnaryConstExpression::IsCompatibleType(Type type, const string& op) {
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// Verify the unary type here
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switch (type) {
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case Type::BOOLEAN: // fall-through
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case Type::INT8: // fall-through
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case Type::INT32: // fall-through
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case Type::INT64:
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return true;
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case Type::FLOATING:
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return (op == "+" || op == "-");
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default:
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return false;
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}
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}
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bool AidlBinaryConstExpression::AreCompatibleTypes(Type t1, Type t2) {
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switch (t1) {
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case Type::STRING:
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if (t2 == Type::STRING) {
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return true;
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}
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break;
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case Type::BOOLEAN: // fall-through
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case Type::INT8: // fall-through
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case Type::INT32: // fall-through
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case Type::INT64:
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switch (t2) {
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case Type::BOOLEAN: // fall-through
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case Type::INT8: // fall-through
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case Type::INT32: // fall-through
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case Type::INT64:
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return true;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return false;
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}
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// Returns the promoted kind for both operands
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AidlConstantValue::Type AidlBinaryConstExpression::UsualArithmeticConversion(Type left,
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Type right) {
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// These are handled as special cases
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AIDL_FATAL_IF(left == Type::STRING || right == Type::STRING, AIDL_LOCATION_HERE);
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AIDL_FATAL_IF(left == Type::FLOATING || right == Type::FLOATING, AIDL_LOCATION_HERE);
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// Kinds in concern: bool, (u)int[8|32|64]
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if (left == right) return left; // easy case
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if (left == Type::BOOLEAN) return right;
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if (right == Type::BOOLEAN) return left;
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return left < right ? right : left;
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}
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// Returns the promoted integral type where INT32 is the smallest type
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AidlConstantValue::Type AidlBinaryConstExpression::IntegralPromotion(Type in) {
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return (Type::INT32 < in) ? in : Type::INT32;
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}
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AidlConstantValue* AidlConstantValue::Default(const AidlTypeSpecifier& specifier) {
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AidlLocation location = specifier.GetLocation();
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// allocation of int[0] is a bit wasteful in Java
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if (specifier.IsArray()) {
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return nullptr;
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}
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const std::string name = specifier.GetName();
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if (name == "boolean") {
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return Boolean(location, false);
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}
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if (name == "char") {
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return Character(location, "'\\0'"); // literal to be used in backends
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}
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if (name == "byte" || name == "int" || name == "long") {
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return Integral(location, "0");
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}
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if (name == "float") {
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return Floating(location, "0.0f");
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}
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if (name == "double") {
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return Floating(location, "0.0");
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}
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return nullptr;
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}
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AidlConstantValue* AidlConstantValue::Boolean(const AidlLocation& location, bool value) {
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return new AidlConstantValue(location, Type::BOOLEAN, value ? "true" : "false");
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}
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AidlConstantValue* AidlConstantValue::Character(const AidlLocation& location,
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const std::string& value) {
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return new AidlConstantValue(location, Type::CHARACTER, value);
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}
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AidlConstantValue* AidlConstantValue::Floating(const AidlLocation& location,
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const std::string& value) {
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return new AidlConstantValue(location, Type::FLOATING, value);
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}
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bool AidlConstantValue::IsHex(const string& value) {
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return StartsWith(value, "0x") || StartsWith(value, "0X");
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}
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bool AidlConstantValue::ParseIntegral(const string& value, int64_t* parsed_value,
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Type* parsed_type) {
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if (parsed_value == nullptr || parsed_type == nullptr) {
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return false;
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}
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const bool isLong = EndsWith(value, 'l') || EndsWith(value, 'L');
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const std::string value_substr = isLong ? value.substr(0, value.size() - 1) : value;
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if (IsHex(value)) {
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// AIDL considers 'const int foo = 0xffffffff' as -1, but if we want to
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// handle that when computing constant expressions, then we need to
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// represent 0xffffffff as a uint32_t. However, AIDL only has signed types;
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// so we parse as an unsigned int when possible and then cast to a signed
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// int. One example of this is in ICameraService.aidl where a constant int
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// is used for bit manipulations which ideally should be handled with an
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// unsigned int.
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//
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// Note, for historical consistency, we need to consider small hex values
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// as an integral type. Recognizing them as INT8 could break some files,
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// even though it would simplify this code.
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if (uint32_t rawValue32;
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!isLong && android::base::ParseUint<uint32_t>(value_substr, &rawValue32)) {
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*parsed_value = static_cast<int32_t>(rawValue32);
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*parsed_type = Type::INT32;
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} else if (uint64_t rawValue64; android::base::ParseUint<uint64_t>(value_substr, &rawValue64)) {
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*parsed_value = static_cast<int64_t>(rawValue64);
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*parsed_type = Type::INT64;
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} else {
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*parsed_value = 0;
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*parsed_type = Type::ERROR;
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return false;
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}
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return true;
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}
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if (!android::base::ParseInt<int64_t>(value_substr, parsed_value)) {
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*parsed_value = 0;
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*parsed_type = Type::ERROR;
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return false;
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}
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if (isLong) {
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*parsed_type = Type::INT64;
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} else {
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// guess literal type.
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if (*parsed_value <= INT8_MAX && *parsed_value >= INT8_MIN) {
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*parsed_type = Type::INT8;
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} else if (*parsed_value <= INT32_MAX && *parsed_value >= INT32_MIN) {
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*parsed_type = Type::INT32;
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} else {
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*parsed_type = Type::INT64;
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}
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}
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return true;
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}
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AidlConstantValue* AidlConstantValue::Integral(const AidlLocation& location, const string& value) {
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AIDL_FATAL_IF(value.empty(), location);
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Type parsed_type;
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int64_t parsed_value = 0;
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bool success = ParseIntegral(value, &parsed_value, &parsed_type);
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if (!success) {
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return nullptr;
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}
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return new AidlConstantValue(location, parsed_type, parsed_value, value);
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}
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AidlConstantValue* AidlConstantValue::Array(
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const AidlLocation& location, std::unique_ptr<vector<unique_ptr<AidlConstantValue>>> values) {
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AIDL_FATAL_IF(values == nullptr, location);
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std::vector<std::string> str_values;
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for (const auto& v : *values) {
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str_values.push_back(v->value_);
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}
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return new AidlConstantValue(location, Type::ARRAY, std::move(values), Join(str_values, ", "));
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}
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AidlConstantValue* AidlConstantValue::String(const AidlLocation& location, const string& value) {
|
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return new AidlConstantValue(location, Type::STRING, value);
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}
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string AidlConstantValue::ValueString(const AidlTypeSpecifier& type,
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const ConstantValueDecorator& decorator) const {
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if (type.IsGeneric()) {
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AIDL_ERROR(type) << "Generic type cannot be specified with a constant literal.";
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return "";
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}
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if (!is_evaluated_) {
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// TODO(b/142722772) CheckValid() should be called before ValueString()
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bool success = CheckValid();
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success &= evaluate();
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if (!success) {
|
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// the detailed error message shall be printed in evaluate
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return "";
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}
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}
|
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if (!is_valid_) {
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AIDL_ERROR(this) << "Invalid constant value: " + value_;
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return "";
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}
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const AidlDefinedType* defined_type = type.GetDefinedType();
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if (defined_type && !type.IsArray()) {
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const AidlEnumDeclaration* enum_type = defined_type->AsEnumDeclaration();
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if (!enum_type) {
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AIDL_ERROR(this) << "Invalid type (" << defined_type->GetCanonicalName()
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<< ") for a const value (" << value_ << ")";
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return "";
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}
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if (type_ != Type::REF) {
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AIDL_ERROR(this) << "Invalid value (" << value_ << ") for enum "
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<< enum_type->GetCanonicalName();
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return "";
|
|
}
|
|
return decorator(type, value_);
|
|
}
|
|
|
|
const string& type_string = type.GetName();
|
|
int err = 0;
|
|
|
|
switch (final_type_) {
|
|
case Type::CHARACTER:
|
|
if (type_string == "char") {
|
|
return decorator(type, final_string_value_);
|
|
}
|
|
err = -1;
|
|
break;
|
|
case Type::STRING:
|
|
if (type_string == "String") {
|
|
return decorator(type, final_string_value_);
|
|
}
|
|
err = -1;
|
|
break;
|
|
case Type::BOOLEAN: // fall-through
|
|
case Type::INT8: // fall-through
|
|
case Type::INT32: // fall-through
|
|
case Type::INT64:
|
|
if (type_string == "byte") {
|
|
if (final_value_ > INT8_MAX || final_value_ < INT8_MIN) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
return decorator(type, std::to_string(static_cast<int8_t>(final_value_)));
|
|
} else if (type_string == "int") {
|
|
if (final_value_ > INT32_MAX || final_value_ < INT32_MIN) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
return decorator(type, std::to_string(static_cast<int32_t>(final_value_)));
|
|
} else if (type_string == "long") {
|
|
return decorator(type, std::to_string(final_value_));
|
|
} else if (type_string == "boolean") {
|
|
return decorator(type, final_value_ ? "true" : "false");
|
|
}
|
|
err = -1;
|
|
break;
|
|
case Type::ARRAY: {
|
|
if (!type.IsArray()) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
vector<string> value_strings;
|
|
value_strings.reserve(values_.size());
|
|
bool success = true;
|
|
|
|
for (const auto& value : values_) {
|
|
const AidlTypeSpecifier& array_base = type.ArrayBase();
|
|
const string value_string = value->ValueString(array_base, decorator);
|
|
if (value_string.empty()) {
|
|
success = false;
|
|
break;
|
|
}
|
|
value_strings.push_back(value_string);
|
|
}
|
|
if (!success) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
return decorator(type, "{" + Join(value_strings, ", ") + "}");
|
|
}
|
|
case Type::FLOATING: {
|
|
if (type_string == "double") {
|
|
double parsed_value;
|
|
if (!ParseFloating(value_, &parsed_value)) {
|
|
AIDL_ERROR(this) << "Could not parse " << value_;
|
|
err = -1;
|
|
break;
|
|
}
|
|
return decorator(type, std::to_string(parsed_value));
|
|
}
|
|
if (type_string == "float") {
|
|
float parsed_value;
|
|
if (!ParseFloating(value_, &parsed_value)) {
|
|
AIDL_ERROR(this) << "Could not parse " << value_;
|
|
err = -1;
|
|
break;
|
|
}
|
|
return decorator(type, std::to_string(parsed_value) + "f");
|
|
}
|
|
err = -1;
|
|
break;
|
|
}
|
|
default:
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
AIDL_FATAL_IF(err == 0, this);
|
|
AIDL_ERROR(this) << "Invalid type specifier for " << ToString(final_type_) << ": " << type_string;
|
|
return "";
|
|
}
|
|
|
|
bool AidlConstantValue::CheckValid() const {
|
|
// Nothing needs to be checked here. The constant value will be validated in
|
|
// the constructor or in the evaluate() function.
|
|
if (is_evaluated_) return is_valid_;
|
|
|
|
switch (type_) {
|
|
case Type::BOOLEAN: // fall-through
|
|
case Type::INT8: // fall-through
|
|
case Type::INT32: // fall-through
|
|
case Type::INT64: // fall-through
|
|
case Type::CHARACTER: // fall-through
|
|
case Type::STRING: // fall-through
|
|
case Type::REF: // fall-through
|
|
case Type::FLOATING: // fall-through
|
|
case Type::UNARY: // fall-through
|
|
case Type::BINARY:
|
|
is_valid_ = true;
|
|
break;
|
|
case Type::ARRAY:
|
|
is_valid_ = true;
|
|
for (const auto& v : values_) is_valid_ &= v->CheckValid();
|
|
break;
|
|
case Type::ERROR:
|
|
return false;
|
|
default:
|
|
AIDL_FATAL(this) << "Unrecognized constant value type: " << ToString(type_);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool AidlConstantValue::evaluate() const {
|
|
if (is_evaluated_) {
|
|
return is_valid_;
|
|
}
|
|
int err = 0;
|
|
is_evaluated_ = true;
|
|
|
|
switch (type_) {
|
|
case Type::ARRAY: {
|
|
Type array_type = Type::ERROR;
|
|
bool success = true;
|
|
for (const auto& value : values_) {
|
|
success = value->CheckValid();
|
|
if (success) {
|
|
success = value->evaluate();
|
|
if (!success) {
|
|
AIDL_ERROR(this) << "Invalid array element: " << value->value_;
|
|
break;
|
|
}
|
|
if (array_type == Type::ERROR) {
|
|
array_type = value->final_type_;
|
|
} else if (!AidlBinaryConstExpression::AreCompatibleTypes(array_type,
|
|
value->final_type_)) {
|
|
AIDL_ERROR(this) << "Incompatible array element type: " << ToString(value->final_type_)
|
|
<< ". Expecting type compatible with " << ToString(array_type);
|
|
success = false;
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (!success) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
final_type_ = type_;
|
|
break;
|
|
}
|
|
case Type::BOOLEAN:
|
|
if ((value_ != "true") && (value_ != "false")) {
|
|
AIDL_ERROR(this) << "Invalid constant boolean value: " << value_;
|
|
err = -1;
|
|
break;
|
|
}
|
|
final_value_ = (value_ == "true") ? 1 : 0;
|
|
final_type_ = type_;
|
|
break;
|
|
case Type::INT8: // fall-through
|
|
case Type::INT32: // fall-through
|
|
case Type::INT64:
|
|
// Parsing happens in the constructor
|
|
final_type_ = type_;
|
|
break;
|
|
case Type::CHARACTER: // fall-through
|
|
case Type::STRING:
|
|
final_string_value_ = value_;
|
|
final_type_ = type_;
|
|
break;
|
|
case Type::FLOATING:
|
|
// Just parse on the fly in ValueString
|
|
final_type_ = type_;
|
|
break;
|
|
default:
|
|
AIDL_FATAL(this) << "Unrecognized constant value type: " << ToString(type_);
|
|
err = -1;
|
|
}
|
|
|
|
return (err == 0) ? true : false;
|
|
}
|
|
|
|
string AidlConstantValue::ToString(Type type) {
|
|
switch (type) {
|
|
case Type::BOOLEAN:
|
|
return "a literal boolean";
|
|
case Type::INT8:
|
|
return "an int8 literal";
|
|
case Type::INT32:
|
|
return "an int32 literal";
|
|
case Type::INT64:
|
|
return "an int64 literal";
|
|
case Type::ARRAY:
|
|
return "a literal array";
|
|
case Type::CHARACTER:
|
|
return "a literal char";
|
|
case Type::STRING:
|
|
return "a literal string";
|
|
case Type::REF:
|
|
return "a reference";
|
|
case Type::FLOATING:
|
|
return "a literal float";
|
|
case Type::UNARY:
|
|
return "a unary expression";
|
|
case Type::BINARY:
|
|
return "a binary expression";
|
|
case Type::ERROR:
|
|
AIDL_FATAL(AIDL_LOCATION_HERE) << "aidl internal error: error type failed to halt program";
|
|
return "";
|
|
default:
|
|
AIDL_FATAL(AIDL_LOCATION_HERE)
|
|
<< "aidl internal error: unknown constant type: " << static_cast<int>(type);
|
|
return ""; // not reached
|
|
}
|
|
}
|
|
|
|
AidlConstantReference::AidlConstantReference(const AidlLocation& location, const std::string& value)
|
|
: AidlConstantValue(location, Type::REF, value) {
|
|
const auto pos = value.find_last_of('.');
|
|
if (pos == string::npos) {
|
|
field_name_ = value;
|
|
} else {
|
|
ref_type_ = std::make_unique<AidlTypeSpecifier>(location, value.substr(0, pos), false, nullptr,
|
|
Comments{});
|
|
field_name_ = value.substr(pos + 1);
|
|
}
|
|
}
|
|
|
|
const AidlConstantValue* AidlConstantReference::Resolve(const AidlDefinedType* scope) const {
|
|
if (resolved_) return resolved_;
|
|
|
|
const AidlDefinedType* defined_type;
|
|
if (ref_type_) {
|
|
defined_type = ref_type_->GetDefinedType();
|
|
} else {
|
|
defined_type = scope;
|
|
}
|
|
|
|
if (!defined_type) {
|
|
// This can happen when "const reference" is used in an unsupported way,
|
|
// but missed in checks there. It works as a safety net.
|
|
AIDL_ERROR(*this) << "Can't resolve the reference (" << value_ << ")";
|
|
return nullptr;
|
|
}
|
|
|
|
if (auto enum_decl = defined_type->AsEnumDeclaration(); enum_decl) {
|
|
for (const auto& e : enum_decl->GetEnumerators()) {
|
|
if (e->GetName() == field_name_) {
|
|
return resolved_ = e->GetValue();
|
|
}
|
|
}
|
|
} else {
|
|
for (const auto& c : defined_type->GetConstantDeclarations()) {
|
|
if (c->GetName() == field_name_) {
|
|
return resolved_ = &c->GetValue();
|
|
}
|
|
}
|
|
}
|
|
AIDL_ERROR(*this) << "Can't find " << field_name_ << " in " << defined_type->GetName();
|
|
return nullptr;
|
|
}
|
|
|
|
bool AidlConstantReference::CheckValid() const {
|
|
if (is_evaluated_) return is_valid_;
|
|
AIDL_FATAL_IF(!resolved_, this) << "Should be resolved first: " << value_;
|
|
is_valid_ = resolved_->CheckValid();
|
|
return is_valid_;
|
|
}
|
|
|
|
bool AidlConstantReference::evaluate() const {
|
|
if (is_evaluated_) return is_valid_;
|
|
AIDL_FATAL_IF(!resolved_, this) << "Should be resolved first: " << value_;
|
|
is_evaluated_ = true;
|
|
|
|
resolved_->evaluate();
|
|
is_valid_ = resolved_->is_valid_;
|
|
final_type_ = resolved_->final_type_;
|
|
if (is_valid_) {
|
|
if (final_type_ == Type::STRING) {
|
|
final_string_value_ = resolved_->final_string_value_;
|
|
} else {
|
|
final_value_ = resolved_->final_value_;
|
|
}
|
|
}
|
|
return is_valid_;
|
|
}
|
|
|
|
bool AidlUnaryConstExpression::CheckValid() const {
|
|
if (is_evaluated_) return is_valid_;
|
|
AIDL_FATAL_IF(unary_ == nullptr, this);
|
|
|
|
is_valid_ = unary_->CheckValid();
|
|
if (!is_valid_) {
|
|
final_type_ = Type::ERROR;
|
|
return false;
|
|
}
|
|
|
|
return AidlConstantValue::CheckValid();
|
|
}
|
|
|
|
bool AidlUnaryConstExpression::evaluate() const {
|
|
if (is_evaluated_) {
|
|
return is_valid_;
|
|
}
|
|
is_evaluated_ = true;
|
|
|
|
// Recursively evaluate the expression tree
|
|
if (!unary_->is_evaluated_) {
|
|
// TODO(b/142722772) CheckValid() should be called before ValueString()
|
|
bool success = CheckValid();
|
|
success &= unary_->evaluate();
|
|
if (!success) {
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
}
|
|
if (!IsCompatibleType(unary_->final_type_, op_)) {
|
|
AIDL_ERROR(unary_) << "'" << op_ << "'"
|
|
<< " is not compatible with " << ToString(unary_->final_type_)
|
|
<< ": " + value_;
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
if (!unary_->is_valid_) {
|
|
AIDL_ERROR(unary_) << "Invalid constant unary expression: " + value_;
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
final_type_ = unary_->final_type_;
|
|
|
|
if (final_type_ == Type::FLOATING) {
|
|
// don't do anything here. ValueString() will handle everything.
|
|
is_valid_ = true;
|
|
return true;
|
|
}
|
|
|
|
#define CASE_UNARY(__type__) \
|
|
return is_valid_ = \
|
|
handleUnary(*this, op_, static_cast<__type__>(unary_->final_value_), &final_value_);
|
|
|
|
SWITCH_KIND(final_type_, CASE_UNARY, SHOULD_NOT_REACH(); final_type_ = Type::ERROR;
|
|
is_valid_ = false; return false;)
|
|
}
|
|
|
|
bool AidlBinaryConstExpression::CheckValid() const {
|
|
bool success = false;
|
|
if (is_evaluated_) return is_valid_;
|
|
AIDL_FATAL_IF(left_val_ == nullptr, this);
|
|
AIDL_FATAL_IF(right_val_ == nullptr, this);
|
|
|
|
success = left_val_->CheckValid();
|
|
if (!success) {
|
|
final_type_ = Type::ERROR;
|
|
AIDL_ERROR(this) << "Invalid left operand in binary expression: " + value_;
|
|
}
|
|
|
|
success = right_val_->CheckValid();
|
|
if (!success) {
|
|
AIDL_ERROR(this) << "Invalid right operand in binary expression: " + value_;
|
|
final_type_ = Type::ERROR;
|
|
}
|
|
|
|
if (final_type_ == Type::ERROR) {
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
|
|
is_valid_ = true;
|
|
return AidlConstantValue::CheckValid();
|
|
}
|
|
|
|
bool AidlBinaryConstExpression::evaluate() const {
|
|
if (is_evaluated_) {
|
|
return is_valid_;
|
|
}
|
|
is_evaluated_ = true;
|
|
AIDL_FATAL_IF(left_val_ == nullptr, this);
|
|
AIDL_FATAL_IF(right_val_ == nullptr, this);
|
|
|
|
// Recursively evaluate the binary expression tree
|
|
if (!left_val_->is_evaluated_ || !right_val_->is_evaluated_) {
|
|
// TODO(b/142722772) CheckValid() should be called before ValueString()
|
|
bool success = CheckValid();
|
|
success &= left_val_->evaluate();
|
|
success &= right_val_->evaluate();
|
|
if (!success) {
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
}
|
|
if (!left_val_->is_valid_ || !right_val_->is_valid_) {
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
is_valid_ = AreCompatibleTypes(left_val_->final_type_, right_val_->final_type_);
|
|
if (!is_valid_) {
|
|
AIDL_ERROR(this) << "Cannot perform operation '" << op_ << "' on "
|
|
<< ToString(right_val_->GetType()) << " and " << ToString(left_val_->GetType())
|
|
<< ".";
|
|
return false;
|
|
}
|
|
|
|
bool isArithmeticOrBitflip = OP_IS_BIN_ARITHMETIC || OP_IS_BIN_BITFLIP;
|
|
|
|
// Handle String case first
|
|
if (left_val_->final_type_ == Type::STRING) {
|
|
AIDL_FATAL_IF(right_val_->final_type_ != Type::STRING, this);
|
|
if (!OPEQ("+")) {
|
|
AIDL_ERROR(this) << "Only '+' is supported for strings, not '" << op_ << "'.";
|
|
final_type_ = Type::ERROR;
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
|
|
// Remove trailing " from lhs
|
|
const string& lhs = left_val_->final_string_value_;
|
|
if (lhs.back() != '"') {
|
|
AIDL_ERROR(this) << "'" << lhs << "' is missing a trailing quote.";
|
|
final_type_ = Type::ERROR;
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
const string& rhs = right_val_->final_string_value_;
|
|
// Remove starting " from rhs
|
|
if (rhs.front() != '"') {
|
|
AIDL_ERROR(this) << "'" << rhs << "' is missing a leading quote.";
|
|
final_type_ = Type::ERROR;
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
|
|
final_string_value_ = string(lhs.begin(), lhs.end() - 1).append(rhs.begin() + 1, rhs.end());
|
|
final_type_ = Type::STRING;
|
|
return true;
|
|
}
|
|
|
|
// CASE: + - * / % | ^ & < > <= >= == !=
|
|
if (isArithmeticOrBitflip || OP_IS_BIN_COMP) {
|
|
// promoted kind for both operands.
|
|
Type promoted = UsualArithmeticConversion(IntegralPromotion(left_val_->final_type_),
|
|
IntegralPromotion(right_val_->final_type_));
|
|
// result kind.
|
|
final_type_ = isArithmeticOrBitflip
|
|
? promoted // arithmetic or bitflip operators generates promoted type
|
|
: Type::BOOLEAN; // comparison operators generates bool
|
|
|
|
#define CASE_BINARY_COMMON(__type__) \
|
|
return is_valid_ = \
|
|
handleBinaryCommon(*this, static_cast<__type__>(left_val_->final_value_), op_, \
|
|
static_cast<__type__>(right_val_->final_value_), &final_value_);
|
|
|
|
SWITCH_KIND(promoted, CASE_BINARY_COMMON, SHOULD_NOT_REACH(); final_type_ = Type::ERROR;
|
|
is_valid_ = false; return false;)
|
|
}
|
|
|
|
// CASE: << >>
|
|
string newOp = op_;
|
|
if (OP_IS_BIN_SHIFT) {
|
|
// promoted kind for both operands.
|
|
final_type_ = UsualArithmeticConversion(IntegralPromotion(left_val_->final_type_),
|
|
IntegralPromotion(right_val_->final_type_));
|
|
auto numBits = right_val_->final_value_;
|
|
if (numBits < 0) {
|
|
// shifting with negative number of bits is undefined in C. In AIDL it
|
|
// is defined as shifting into the other direction.
|
|
newOp = OPEQ("<<") ? ">>" : "<<";
|
|
numBits = -numBits;
|
|
}
|
|
|
|
#define CASE_SHIFT(__type__) \
|
|
return is_valid_ = handleShift(*this, static_cast<__type__>(left_val_->final_value_), newOp, \
|
|
static_cast<__type__>(numBits), &final_value_);
|
|
|
|
SWITCH_KIND(final_type_, CASE_SHIFT, SHOULD_NOT_REACH(); final_type_ = Type::ERROR;
|
|
is_valid_ = false; return false;)
|
|
}
|
|
|
|
// CASE: && ||
|
|
if (OP_IS_BIN_LOGICAL) {
|
|
final_type_ = Type::BOOLEAN;
|
|
// easy; everything is bool.
|
|
return handleLogical(*this, left_val_->final_value_, op_, right_val_->final_value_,
|
|
&final_value_);
|
|
}
|
|
|
|
SHOULD_NOT_REACH();
|
|
is_valid_ = false;
|
|
return false;
|
|
}
|
|
|
|
// Constructor for integer(byte, int, long)
|
|
// Keep parsed integer & literal
|
|
AidlConstantValue::AidlConstantValue(const AidlLocation& location, Type parsed_type,
|
|
int64_t parsed_value, const string& checked_value)
|
|
: AidlNode(location),
|
|
type_(parsed_type),
|
|
value_(checked_value),
|
|
final_type_(parsed_type),
|
|
final_value_(parsed_value) {
|
|
AIDL_FATAL_IF(value_.empty() && type_ != Type::ERROR, location);
|
|
AIDL_FATAL_IF(type_ != Type::INT8 && type_ != Type::INT32 && type_ != Type::INT64, location);
|
|
}
|
|
|
|
// Constructor for non-integer(String, char, boolean, float, double)
|
|
// Keep literal as it is. (e.g. String literal has double quotes at both ends)
|
|
AidlConstantValue::AidlConstantValue(const AidlLocation& location, Type type,
|
|
const string& checked_value)
|
|
: AidlNode(location),
|
|
type_(type),
|
|
value_(checked_value),
|
|
final_type_(type) {
|
|
AIDL_FATAL_IF(value_.empty() && type_ != Type::ERROR, location);
|
|
switch (type_) {
|
|
case Type::INT8:
|
|
case Type::INT32:
|
|
case Type::INT64:
|
|
case Type::ARRAY:
|
|
AIDL_FATAL(this) << "Invalid type: " << ToString(type_);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Constructor for array
|
|
AidlConstantValue::AidlConstantValue(const AidlLocation& location, Type type,
|
|
std::unique_ptr<vector<unique_ptr<AidlConstantValue>>> values,
|
|
const std::string& value)
|
|
: AidlNode(location),
|
|
type_(type),
|
|
values_(std::move(*values)),
|
|
value_(value),
|
|
is_valid_(false),
|
|
is_evaluated_(false),
|
|
final_type_(type) {
|
|
AIDL_FATAL_IF(type_ != Type::ARRAY, location);
|
|
}
|
|
|
|
AidlUnaryConstExpression::AidlUnaryConstExpression(const AidlLocation& location, const string& op,
|
|
std::unique_ptr<AidlConstantValue> rval)
|
|
: AidlConstantValue(location, Type::UNARY, op + rval->value_),
|
|
unary_(std::move(rval)),
|
|
op_(op) {
|
|
final_type_ = Type::UNARY;
|
|
}
|
|
|
|
AidlBinaryConstExpression::AidlBinaryConstExpression(const AidlLocation& location,
|
|
std::unique_ptr<AidlConstantValue> lval,
|
|
const string& op,
|
|
std::unique_ptr<AidlConstantValue> rval)
|
|
: AidlConstantValue(location, Type::BINARY, lval->value_ + op + rval->value_),
|
|
left_val_(std::move(lval)),
|
|
right_val_(std::move(rval)),
|
|
op_(op) {
|
|
final_type_ = Type::BINARY;
|
|
}
|