xref: /third_party/lzma/CPP/Common/Common.h

// Common.h

#if defined(_MSC_VER) && _MSC_VER >= 1800
#pragma warning(disable : 4464) // relative include path contains '..'
#endif

#ifndef ZIP7_INC_COMMON_H
#define ZIP7_INC_COMMON_H

#include "../../C/Compiler.h"

/*
This file is included to all cpp files in 7-Zip.
Each folder contains StdAfx.h file that includes "Common.h".
So 7-Zip includes "Common.h" in both modes:
  with precompiled StdAfx.h
and
  without precompiled StdAfx.h

If you use 7-Zip code, you must include "Common.h" before other h files of 7-zip.
If you don't need some things that are used in 7-Zip,
you can change this h file or h files included in this file.
*/

#ifdef _MSC_VER
  #pragma warning(disable : 4710) // function not inlined
  // 'CUncopyable::CUncopyable':
  #pragma warning(disable : 4514) // unreferenced inline function has been removed
  #if _MSC_VER < 1300
    #pragma warning(disable : 4702) // unreachable code
    #pragma warning(disable : 4714) // function marked as __forceinline not inlined
    #pragma warning(disable : 4786) // identifier was truncated to '255' characters in the debug information
  #endif
  #if _MSC_VER < 1400
    #pragma warning(disable : 4511) // copy constructor could not be generated    // #pragma warning(disable : 4512) // assignment operator could not be generated
    #pragma warning(disable : 4512) // assignment operator could not be generated
  #endif
  #if _MSC_VER > 1400 && _MSC_VER <= 1900
    // #pragma warning(disable : 4996)
       // strcat: This function or variable may be unsafe
       // GetVersion was declared deprecated
  #endif

#if _MSC_VER > 1200
// -Wall warnings

#if _MSC_VER <= 1600
#pragma warning(disable : 4917) // 'OLE_HANDLE' : a GUID can only be associated with a class, interface or namespace
#endif

// #pragma warning(disable : 4061) // enumerator '' in switch of enum '' is not explicitly handled by a case label
// #pragma warning(disable : 4266) // no override available for virtual member function from base ''; function is hidden
#pragma warning(disable : 4625) // copy constructor was implicitly defined as deleted
#pragma warning(disable : 4626) // assignment operator was implicitly defined as deleted
#if _MSC_VER >= 1600 && _MSC_VER < 1920
#pragma warning(disable : 4571) // Informational: catch(...) semantics changed since Visual C++ 7.1; structured exceptions (SEH) are no longer caught
#endif
#if _MSC_VER >= 1600
#pragma warning(disable : 4365) // 'initializing' : conversion from 'int' to 'unsigned int', signed / unsigned mismatch
#endif
#if _MSC_VER < 1800
// we disable the warning, if we don't use 'final' in class
#pragma warning(disable : 4265) // class has virtual functions, but destructor is not virtual
#endif

#if _MSC_VER >= 1900
#pragma warning(disable : 5026) // move constructor was implicitly defined as deleted
#pragma warning(disable : 5027) // move assignment operator was implicitly defined as deleted
#endif
#if _MSC_VER >= 1912
#pragma warning(disable : 5039) // pointer or reference to potentially throwing function passed to 'extern "C"' function under - EHc.Undefined behavior may occur if this function throws an exception.
#endif
#if _MSC_VER >= 1925
// #pragma warning(disable : 5204) // 'ISequentialInStream' : class has virtual functions, but its trivial destructor is not virtual; instances of objects derived from this class may not be destructed correctly
#endif
#if _MSC_VER >= 1934
// #pragma warning(disable : 5264) // const variable is not used
#endif

#endif // _MSC_VER > 1200
#endif // _MSC_VER


#if defined(_MSC_VER) // && !defined(__clang__)
#define Z7_DECLSPEC_NOTHROW   __declspec(nothrow)
#elif defined(__clang__) || defined(__GNUC__)
#define Z7_DECLSPEC_NOTHROW   __attribute__((nothrow))
#else
#define Z7_DECLSPEC_NOTHROW
#endif

/*
#if defined (_MSC_VER) && _MSC_VER >= 1900 \
    || defined(__clang__) && __clang_major__ >= 6 \
    || defined(__GNUC__) && __GNUC__ >= 6
  #define Z7_noexcept noexcept
#else
  #define Z7_noexcept throw()
#endif
*/


#if defined(__clang__)

// noexcept, final, = delete
#pragma GCC diagnostic ignored "-Wc++98-compat"
#if __clang_major__ >= 4
// throw() dynamic exception specifications are deprecated
#pragma GCC diagnostic ignored "-Wdeprecated-dynamic-exception-spec"
#endif
#pragma GCC diagnostic ignored "-Wold-style-cast"
#pragma GCC diagnostic ignored "-Wglobal-constructors"
#pragma GCC diagnostic ignored "-Wexit-time-destructors"

// #pragma GCC diagnostic ignored "-Wunused-private-field"
// #pragma GCC diagnostic ignored "-Wnonportable-system-include-path"
// #pragma GCC diagnostic ignored "-Wsuggest-override"
// #pragma GCC diagnostic ignored "-Wsign-conversion"
// #pragma GCC diagnostic ignored "-Winconsistent-missing-override"
// #pragma GCC diagnostic ignored "-Wsuggest-destructor-override"
// #pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
// #pragma GCC diagnostic ignored "-Wdeprecated-copy-with-user-provided-dtor"
// #pragma GCC diagnostic ignored "-Wdeprecated-copy-dtor"
// #ifndef _WIN32
// #pragma GCC diagnostic ignored "-Wweak-vtables"
// #endif
/*
#if   defined(Z7_GCC_VERSION)   && (Z7_GCC_VERSION   >= 40400) \
   || defined(Z7_CLANG_VERSION) && (Z7_CLANG_VERSION >= 30000)
// enumeration values not explicitly handled in switch
#pragma GCC diagnostic ignored "-Wswitch-enum"
#endif
*/
#endif // __clang__


#ifdef __GNUC__
// #pragma GCC diagnostic ignored "-Wdelete-non-virtual-dtor"
#endif


/* There is BUG in MSVC 6.0 compiler for operator new[]:
   It doesn't check overflow, when it calculates size in bytes for allocated array.
   So we can use Z7_ARRAY_NEW macro instead of new[] operator. */

#if defined(_MSC_VER) && (_MSC_VER == 1200) && !defined(_WIN64)
  #define Z7_ARRAY_NEW(p, T, size)  p = new T[((size) > (unsigned)0xFFFFFFFF / sizeof(T)) ? (unsigned)0xFFFFFFFF / sizeof(T) : (size)];
#else
  #define Z7_ARRAY_NEW(p, T, size)  p = new T[size];
#endif

#if (defined(__GNUC__) && (__GNUC__ >= 8))
  #define Z7_ATTR_NORETURN  __attribute__((noreturn))
#elif (defined(__clang__) && (__clang_major__ >= 3))
  #if __has_feature(cxx_attributes)
    #define Z7_ATTR_NORETURN  [[noreturn]]
  #else
    #define Z7_ATTR_NORETURN  __attribute__((noreturn))
  #endif
#elif (defined(_MSC_VER) && (_MSC_VER >= 1900))
  #define Z7_ATTR_NORETURN  [[noreturn]]
#else
  #define Z7_ATTR_NORETURN
#endif


// final in "GCC 4.7.0"
// In C++98 and C++03 code the alternative spelling __final can be used instead (this is a GCC extension.)

#if defined (__cplusplus) && __cplusplus >= 201103L \
    || defined(_MSC_VER) && _MSC_VER >= 1800 \
    || defined(__clang__) && __clang_major__ >= 4 \
    /* || defined(__GNUC__) && __GNUC__ >= 9 */
  #define Z7_final  final
  #if defined(__clang__) && __cplusplus < 201103L
    #pragma GCC diagnostic ignored "-Wc++11-extensions"
  #endif
#elif defined (__cplusplus) && __cplusplus >= 199711L \
    && defined(__GNUC__) && __GNUC__ >= 4 && !defined(__clang__)
  #define Z7_final __final
#else
  #define Z7_final
  #if defined(__clang__) && __clang_major__ >= 4 \
     || defined(__GNUC__) && __GNUC__ >= 4
    #pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
    #pragma GCC diagnostic ignored "-Wdelete-non-virtual-dtor"
  #endif
#endif

#define Z7_class_final(c)  class c Z7_final


#if defined (__cplusplus) && __cplusplus >= 201103L \
    || (defined(_MSC_VER) && _MSC_VER >= 1800)
  #define Z7_CPP_IS_SUPPORTED_default
  #define Z7_eq_delete  = delete
  // #define Z7_DECL_DEFAULT_COPY_CONSTRUCTOR_IF_SUPPORTED(c) c(const c& k) = default;
#else
  #define Z7_eq_delete
  // #define Z7_DECL_DEFAULT_COPY_CONSTRUCTOR_IF_SUPPORTED(c)
#endif


#if defined(__cplusplus) && (__cplusplus >= 201103L) \
    || defined(_MSC_VER) && (_MSC_VER >= 1400) /* && (_MSC_VER != 1600) */ \
    || defined(__clang__) && __clang_major__ >= 4
  #if defined(_MSC_VER) && (_MSC_VER == 1600) /* && (_MSC_VER != 1600) */
    #pragma warning(disable : 4481) // nonstandard extension used: override specifier 'override'
    #define Z7_DESTRUCTOR_override
  #else
    #define Z7_DESTRUCTOR_override  override
  #endif
  #define Z7_override  override
#else
  #define Z7_override
  #define Z7_DESTRUCTOR_override
#endif



#define Z7_CLASS_NO_COPY(cls) \
  private: \
  cls(const cls &) Z7_eq_delete; \
  cls &operator=(const cls &) Z7_eq_delete;

class CUncopyable
{
protected:
  CUncopyable() {} // allow constructor
  // ~CUncopyable() {}
  Z7_CLASS_NO_COPY(CUncopyable)
};

#define MY_UNCOPYABLE  :private CUncopyable
// #define MY_UNCOPYABLE


typedef void (*Z7_void_Function)(void);

#if defined(__clang__) || defined(__GNUC__)
#define Z7_CAST_FUNC(t, e) reinterpret_cast<t>(reinterpret_cast<Z7_void_Function>(e))
#else
#define Z7_CAST_FUNC(t, e) reinterpret_cast<t>(reinterpret_cast<void*>(e))
// #define Z7_CAST_FUNC(t, e) reinterpret_cast<t>(e)
#endif

#define Z7_GET_PROC_ADDRESS(func_type, hmodule, func_name)  \
    Z7_CAST_FUNC(func_type, GetProcAddress(hmodule, func_name))

// || defined(__clang__)
// || defined(__GNUC__)

#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#define Z7_DECLSPEC_NOVTABLE __declspec(novtable)
#else
#define Z7_DECLSPEC_NOVTABLE
#endif

#ifdef __clang__
#define Z7_PURE_INTERFACES_BEGIN \
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wnon-virtual-dtor\"")
_Pragma("GCC diagnostic ignored \"-Wweak-vtables\"")
#define Z7_PURE_INTERFACES_END \
_Pragma("GCC diagnostic pop")
#else
#define Z7_PURE_INTERFACES_BEGIN
#define Z7_PURE_INTERFACES_END
#endif

// NewHandler.h and NewHandler.cpp redefine operator new() to throw exceptions, if compiled with old MSVC compilers
#include "NewHandler.h"

/*
// #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a)  Z7_ARRAY_SIZE(a)
#endif
*/

#endif // ZIP7_INC_COMMON_H



// #define Z7_REDEFINE_NULL

#if defined(Z7_REDEFINE_NULL) /* && (!defined(__clang__) || defined(_MSC_VER)) */

// NULL is defined in <stddef.h>
#include <stddef.h>
#undef NULL

#ifdef __cplusplus
  #if defined (__cplusplus) && __cplusplus >= 201103L \
    || (defined(_MSC_VER) && _MSC_VER >= 1800)
    #define NULL  nullptr
  #else
    #define NULL  0
  #endif
#else
  #define NULL  ((void *)0)
#endif

#else // Z7_REDEFINE_NULL

#if defined(__clang__) && __clang_major__ >= 5
#pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif

#endif // Z7_REDEFINE_NULL

// for precompiler:
#include "MyWindows.h"