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/****************************************************************** |
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* * |
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* intsafe.h -- This module defines helper functions to prevent * |
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* integer overflow bugs. * |
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* * |
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* Copyright (c) Microsoft Corp. All rights reserved. * |
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* * |
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******************************************************************/ |
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#ifndef _INTSAFE_H_INCLUDED_ |
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#define _INTSAFE_H_INCLUDED_ |
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#if (_MSC_VER > 1000) |
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#pragma once |
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#endif |
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#include <specstrings.h> // for __in, etc. |
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#if !defined(_W64) |
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#if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && (_MSC_VER >= 1300) |
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#define _W64 __w64 |
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#else |
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#define _W64 |
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#endif |
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#endif |
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// |
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// typedefs |
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// |
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typedef char CHAR; |
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typedef signed char INT8; |
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typedef unsigned char UCHAR; |
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typedef unsigned char UINT8; |
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typedef unsigned char BYTE; |
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typedef short SHORT; |
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typedef signed short INT16; |
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typedef unsigned short USHORT; |
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typedef unsigned short UINT16; |
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typedef unsigned short WORD; |
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typedef int INT; |
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typedef signed int INT32; |
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typedef unsigned int UINT; |
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typedef unsigned int UINT32; |
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typedef long LONG; |
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typedef unsigned long ULONG; |
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typedef unsigned long DWORD; |
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typedef __int64 LONGLONG; |
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typedef __int64 LONG64; |
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typedef signed __int64 INT64; |
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typedef unsigned __int64 ULONGLONG; |
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typedef unsigned __int64 DWORDLONG; |
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typedef unsigned __int64 ULONG64; |
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typedef unsigned __int64 DWORD64; |
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typedef unsigned __int64 UINT64; |
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#if (__midl > 501) |
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typedef [public] __int3264 INT_PTR; |
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typedef [public] unsigned __int3264 UINT_PTR; |
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typedef [public] __int3264 LONG_PTR; |
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typedef [public] unsigned __int3264 ULONG_PTR; |
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#else |
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#ifdef _WIN64 |
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typedef __int64 INT_PTR; |
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typedef unsigned __int64 UINT_PTR; |
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typedef __int64 LONG_PTR; |
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typedef unsigned __int64 ULONG_PTR; |
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#else |
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typedef _W64 int INT_PTR; |
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typedef _W64 unsigned int UINT_PTR; |
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typedef _W64 long LONG_PTR; |
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typedef _W64 unsigned long ULONG_PTR; |
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#endif // WIN64 |
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#endif // (__midl > 501) |
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#ifdef _WIN64 |
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typedef __int64 ptrdiff_t; |
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typedef unsigned __int64 size_t; |
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#else |
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typedef _W64 int ptrdiff_t; |
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typedef _W64 unsigned int size_t; |
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#endif |
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typedef ULONG_PTR DWORD_PTR; |
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typedef LONG_PTR SSIZE_T; |
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typedef ULONG_PTR SIZE_T; |
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#if defined(_AMD64_) |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define UnsignedMultiply128 _umul128 |
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ULONG64 |
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UnsignedMultiply128 ( |
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__in ULONG64 Multiplier, |
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__in ULONG64 Multiplicand, |
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__out __deref_out_range(==,Multiplier * Multiplicand) ULONG64 *HighProduct |
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); |
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#pragma intrinsic(_umul128) |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif // _AMD64_ |
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typedef __success(return >= 0) long HRESULT; |
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#define SUCCEEDED(hr) (((HRESULT)(hr)) >= 0) |
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#define FAILED(hr) (((HRESULT)(hr)) < 0) |
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#define S_OK ((HRESULT)0L) |
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#define INTSAFE_E_ARITHMETIC_OVERFLOW ((HRESULT)0x80070216L) // 0x216 = 534 = ERROR_ARITHMETIC_OVERFLOW |
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#ifndef SORTPP_PASS |
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// compiletime asserts (failure results in error C2118: negative subscript) |
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#define C_ASSERT(e) typedef char __C_ASSERT__[(e)?1:-1] |
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#else |
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#define C_ASSERT(e) |
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#endif |
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// |
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// UInt32x32To64 macro |
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// |
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#if defined(MIDL_PASS) || defined(RC_INVOKED) || defined(_M_CEE_PURE) \ |
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|| defined(_68K_) || defined(_MPPC_) \ |
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|| defined(_M_IA64) || defined(_M_AMD64) |
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#define UInt32x32To64(a, b) (((unsigned __int64)((unsigned int)(a))) * ((unsigned __int64)((unsigned int)(b)))) |
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#elif defined(_M_IX86) |
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#define UInt32x32To64(a, b) ((unsigned __int64)(((unsigned __int64)((unsigned int)(a))) * ((unsigned int)(b)))) |
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#else |
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#error Must define a target architecture. |
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#endif |
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// |
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// Min/Max type values |
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// |
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#define INT8_MIN (-127i8 - 1) |
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#define SHORT_MIN (-32768) |
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#define INT16_MIN (-32767i16 - 1) |
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#define INT_MIN (-2147483647 - 1) |
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#define INT32_MIN (-2147483647i32 - 1) |
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#define LONG_MIN (-2147483647L - 1) |
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#define LONGLONG_MIN (-9223372036854775807i64 - 1) |
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#define LONG64_MIN (-9223372036854775807i64 - 1) |
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#define INT64_MIN (-9223372036854775807i64 - 1) |
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#define INT128_MIN (-170141183460469231731687303715884105727i128 - 1) |
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#ifdef _WIN64 |
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#define INT_PTR_MIN (-9223372036854775807i64 - 1) |
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#define LONG_PTR_MIN (-9223372036854775807i64 - 1) |
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#define PTRDIFF_T_MIN (-9223372036854775807i64 - 1) |
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#define SSIZE_T_MIN (-9223372036854775807i64 - 1) |
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#else |
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#define INT_PTR_MIN (-2147483647 - 1) |
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#define LONG_PTR_MIN (-2147483647L - 1) |
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#define PTRDIFF_T_MIN (-2147483647 - 1) |
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#define SSIZE_T_MIN (-2147483647L - 1) |
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#endif |
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#define INT8_MAX 127i8 |
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#define UINT8_MAX 0xffui8 |
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#define BYTE_MAX 0xff |
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#define SHORT_MAX 32767 |
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#define INT16_MAX 32767i16 |
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#define USHORT_MAX 0xffff |
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#define UINT16_MAX 0xffffui16 |
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#define WORD_MAX 0xffff |
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#define INT_MAX 2147483647 |
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#define INT32_MAX 2147483647i32 |
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#define UINT_MAX 0xffffffff |
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#define UINT32_MAX 0xffffffffui32 |
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#define LONG_MAX 2147483647L |
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#define ULONG_MAX 0xffffffffUL |
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#define DWORD_MAX 0xffffffffUL |
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#define LONGLONG_MAX 9223372036854775807i64 |
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#define LONG64_MAX 9223372036854775807i64 |
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#define INT64_MAX 9223372036854775807i64 |
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#define ULONGLONG_MAX 0xffffffffffffffffui64 |
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#define DWORDLONG_MAX 0xffffffffffffffffui64 |
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#define ULONG64_MAX 0xffffffffffffffffui64 |
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#define DWORD64_MAX 0xffffffffffffffffui64 |
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#define UINT64_MAX 0xffffffffffffffffui64 |
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#define INT128_MAX 170141183460469231731687303715884105727i128 |
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#define UINT128_MAX 0xffffffffffffffffffffffffffffffffui128 |
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#undef SIZE_T_MAX |
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#ifdef _WIN64 |
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#define INT_PTR_MAX 9223372036854775807i64 |
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#define UINT_PTR_MAX 0xffffffffffffffffui64 |
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#define LONG_PTR_MAX 9223372036854775807i64 |
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#define ULONG_PTR_MAX 0xffffffffffffffffui64 |
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#define DWORD_PTR_MAX 0xffffffffffffffffui64 |
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#define PTRDIFF_T_MAX 9223372036854775807i64 |
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#define SIZE_T_MAX 0xffffffffffffffffui64 |
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#define SSIZE_T_MAX 9223372036854775807i64 |
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#define _SIZE_T_MAX 0xffffffffffffffffui64 |
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#else |
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#define INT_PTR_MAX 2147483647 |
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#define UINT_PTR_MAX 0xffffffff |
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#define LONG_PTR_MAX 2147483647L |
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#define ULONG_PTR_MAX 0xffffffffUL |
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#define DWORD_PTR_MAX 0xffffffffUL |
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#define PTRDIFF_T_MAX 2147483647 |
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#define SIZE_T_MAX 0xffffffff |
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#define SSIZE_T_MAX 2147483647L |
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#define _SIZE_T_MAX 0xffffffffUL |
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#endif |
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// |
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// It is common for -1 to be used as an error value |
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// |
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#define INT8_ERROR (-1i8) |
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#define UINT8_ERROR 0xffui8 |
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#define BYTE_ERROR 0xff |
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#define SHORT_ERROR (-1) |
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#define INT16_ERROR (-1i16) |
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#define USHORT_ERROR 0xffff |
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#define UINT16_ERROR 0xffffui16 |
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#define WORD_ERROR 0xffff |
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#define INT_ERROR (-1) |
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#define INT32_ERROR (-1i32) |