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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LIB_DEMANGLE_DEMANGLER_H
#define __LIB_DEMANGLE_DEMANGLER_H
#include <assert.h>
#include <stack>
#include <string>
#include <vector>
class Demangler {
public:
Demangler() = default;
// NOTE: The max_length is not guaranteed to be the absolute max length
// of a string that will be rejected. Under certain circumstances the
// length check will not occur until after the second letter of a pair
// is checked.
std::string Parse(const char* name, size_t max_length = kMaxDefaultLength);
void AppendCurrent(const std::string& str);
void AppendCurrent(const char* str);
void AppendArgument(const std::string& str);
std::string GetArgumentsString();
void FinalizeTemplate();
const char* ParseS(const char* name);
const char* ParseT(const char* name);
const char* AppendOperatorString(const char* name);
void Save(const std::string& str, bool is_name);
private:
void Clear() {
parse_funcs_.clear();
function_name_.clear();
function_suffix_.clear();
first_save_.clear();
cur_state_.Clear();
saves_.clear();
template_saves_.clear();
while (!state_stack_.empty()) {
state_stack_.pop();
}
last_save_name_ = false;
template_found_ = false;
}
using parse_func_type = const char* (Demangler::*)(const char*);
parse_func_type parse_func_;
std::vector<parse_func_type> parse_funcs_;
std::vector<std::string> saves_;
std::vector<std::string> template_saves_;
bool last_save_name_;
bool template_found_;
std::string function_name_;
std::string function_suffix_;
struct StateData {
void Clear() {
str.clear();
args.clear();
prefix.clear();
suffixes.clear();
last_save.clear();
}
std::string str;
std::vector<std::string> args;
std::string prefix;
std::vector<std::string> suffixes;
std::string last_save;
};
std::stack<StateData> state_stack_;
std::string first_save_;
StateData cur_state_;
static const char* GetStringFromLength(const char* name, std::string* str);
// Parsing functions.
const char* ParseComplexString(const char* name);
const char* ParseComplexArgument(const char* name);
const char* ParseArgumentsAtTopLevel(const char* name);
const char* ParseArguments(const char* name);
const char* ParseTemplateArguments(const char* name);
const char* ParseTemplateArgumentsComplex(const char* name);
const char* ParseTemplateLiteral(const char* name);
const char* ParseFunctionArgument(const char* name);
const char* ParseFunctionName(const char* name);
const char* ParseFunctionNameTemplate(const char* name);
const char* ParseFunctionTemplateArguments(const char* name);
const char* FindFunctionName(const char* name);
const char* Fail(const char*) { return nullptr; }
// The default maximum string length string to process.
static constexpr size_t kMaxDefaultLength = 2048;
static constexpr const char* kTypes[] = {
"signed char", // a
"bool", // b
"char", // c
"double", // d
"long double", // e
"float", // f
"__float128", // g
"unsigned char", // h
"int", // i
"unsigned int", // j
nullptr, // k
"long", // l
"unsigned long", // m
"__int128", // n
"unsigned __int128", // o
nullptr, // p
nullptr, // q
nullptr, // r
"short", // s
"unsigned short", // t
nullptr, // u
"void", // v
"wchar_t", // w
"long long", // x
"unsigned long long", // y
"...", // z
};
static constexpr const char* kDTypes[] = {
"auto", // a
nullptr, // b
nullptr, // c
"decimal64", // d
"decimal128", // e
"decimal32", // f
nullptr, // g
"half", // h
"char32_t", // i
nullptr, // j
nullptr, // k
nullptr, // l
nullptr, // m
"decltype(nullptr)", // n
nullptr, // o
nullptr, // p
nullptr, // q
nullptr, // r
"char16_t", // s
nullptr, // t
nullptr, // u
nullptr, // v
nullptr, // w
nullptr, // x
nullptr, // y
nullptr, // z
};
static constexpr const char* kSTypes[] = {
"std::allocator", // a
"std::basic_string", // b
nullptr, // c
"std::iostream", // d
nullptr, // e
nullptr, // f
nullptr, // g
nullptr, // h
"std::istream", // i
nullptr, // j
nullptr, // k
nullptr, // l
nullptr, // m
nullptr, // n
"std::ostream", // o
nullptr, // p
nullptr, // q
nullptr, // r
"std::string", // s
nullptr, // t
nullptr, // u
nullptr, // v
nullptr, // w
nullptr, // x
nullptr, // y
nullptr, // z
};
};
#endif // __LIB_DEMANGLE_DEMANGLER_H
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