text: /*
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * 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 THRIFT_THRIFT_H_
  #define THRIFT_THRIFT_H_
  
  #include <folly/Range.h>
  #include <folly/Traits.h>
  #include <folly/lang/Bits.h>
  #include <folly/portability/Time.h>
  
  #include <thrift/lib/cpp/thrift_config.h>
  
  #ifdef THRIFT_PLATFORM_CONFIG
  #include THRIFT_PLATFORM_CONFIG
  #endif
  
  #include <assert.h>
  #include <sys/types.h>
  #if __has_include(<inttypes.h>)
  #include <inttypes.h>
  #endif
  #include <stdio.h>
  #include <string.h>
  
  #include <algorithm>
  #include <exception>
  #include <map>
  #include <memory>
  #include <set>
  #include <string>
  #include <typeinfo>
  #include <unordered_map>
  #include <unordered_set>
  #include <vector>
  
  #include <thrift/lib/cpp/TLogging.h>
  
  namespace apache {
  namespace thrift {
  
  struct ltstr {
    bool operator()(const char* s1, const char* s2) const {
      return strcmp(s1, s2) < 0;
    }
  };
  
  /**
   * Specialization fwd-decl in _types.h.
   * Specialization defn in _data.h.
   */
  template <typename T>
  struct TEnumDataStorage {
    static_assert(sizeof(T) == ~0ull, "invalid use of base template");
  };
  template <typename T>
  struct TStructDataStorage {
    static_assert(sizeof(T) == ~0ull, "invalid use of base template");
  };
  
  /**
   * Specialization defn in _types.h.
   * Specialization member defns in _types.cpp.
   */
  template <typename T>
  struct TEnumTraits {
    //  When instantiated with an enum type T, includes:
    //
    //      using type = T;
    //
    //      static constexpr std::size_t const size = /*...*/;
    //      static folly::Range<type const*> const values;
    //      static folly::Range<folly::StringPiece const*> const names;
    //
    //      static char const* findName(type value);
    //      static bool findValue(char const* name, type* out);
    //
    //  When instantiated with an enum type T which is not empty, includes:
    //
    //      static constexpr type min() { /*...*/ }
    //      static constexpr type max() { /*...*/ }
    //
    //  To test at compile time whether a given enum T is generated by thrift, the
    //  presence of TEnumTraits<T>::type may be tested. If it is present, then T
    //  is generated by thrift; if absent, then T is not generated by thrift.
  
    static char const* findName(T) {
      static_assert(sizeof(T) == ~0ull, "invalid use of base template");
      return nullptr;
    }
    static bool findValue(char const*, T*) {
      static_assert(sizeof(T) == ~0ull, "invalid use of base template");
      return false;
    }
  };
  
  namespace detail {
  
  template <typename EnumTypeT>
  struct TEnumMapFactory {
    using EnumType = EnumTypeT;
    using ValuesToNamesMapType = std::map<EnumType, const char*>;
    using NamesToValuesMapType = std::map<const char*, EnumType, ltstr>;
    using Traits = TEnumTraits<EnumType>;
  
    static ValuesToNamesMapType makeValuesToNamesMap() {
      ValuesToNamesMapType _return;
      for (size_t i = 0; i < Traits::size; ++i) {
        _return.emplace(EnumType(Traits::values[i]), Traits::names[i].data());
      }
      return _return;
    }
    static NamesToValuesMapType makeNamesToValuesMap() {
      NamesToValuesMapType _return;
      for (size_t i = 0; i < Traits::size; ++i) {
        _return.emplace(Traits::names[i].data(), EnumType(Traits::values[i]));
      }
      return _return;
    }
  };
  
  } // namespace detail
  
  class TOutput {
   public:
    TOutput() : f_(&errorTimeWrapper) {}
  
    inline void setOutputFunction(void (*function)(const char*)) {
      f_ = function;
    }
  
    inline void operator()(const char* message) {
      f_(message);
    }
  
    // It is important to have a const char* overload here instead of
    // just the string version, otherwise errno could be corrupted
    // if there is some problem allocating memory when constructing
    // the string.
    void perror(const char* message, int errno_copy);
    inline void perror(const std::string& message, int errno_copy) {
      perror(message.c_str(), errno_copy);
    }
  
    void printf(const char* message, ...);
  
    inline static void errorTimeWrapper(const char* msg) {
      time_t now;
      char dbgtime[26];
      time(&now);
      ctime_r(&now, dbgtime);
      dbgtime[24] = 0;
      fprintf(stderr, "Thrift: %s %s\n", dbgtime, msg);
    }
  
    /** Just like strerror_r but returns a C++ string object. */
    static std::string strerror_s(int errno_copy);
  
   private:
    void (*f_)(const char*);
  };
  
  extern TOutput GlobalOutput;
  
  /**
   * Base class for all Thrift exceptions.
   * Should never be instantiated, only caught.
   */
  class TException : public std::exception {
   public:
    TException() {}
    TException(TException&&) noexcept {}
    TException(const TException&) {}
    TException& operator=(const TException&) {
      return *this;
    }
    TException& operator=(TException&&) {
      return *this;
    }
  };
  
  /**
   * Base class for exceptions from the Thrift library, and occasionally
   * from the generated code.  This class should not be thrown by user code.
   * Instances of this class are not meant to be serialized.
   */
  class TLibraryException : public TException {
   public:
    TLibraryException() {}
  
    explicit TLibraryException(const std::string& message) : message_(message) {}
  
    TLibraryException(const char* message, int errnoValue);
  
    ~TLibraryException() throw() override {}
  
    const char* what() const throw() override {
      if (message_.empty()) {
        return "Default TLibraryException.";
      } else {
        return message_.c_str();
      }
    }
  
   protected:
    std::string message_;
  };
  
  } // namespace thrift
  } // namespace apache
  
  #endif // #ifndef THRIFT_THRIFT_H_
  