// -*- C++ -*- //===----------------------- support/win32/support.h ----------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #ifndef _LIBCPP_SUPPORT_WIN32_SUPPORT_H #define _LIBCPP_SUPPORT_WIN32_SUPPORT_H /* Functions and constants used in libc++ that are missing from the Windows C library. */ #include <__config> #include // mbstate_t #include // _snwprintf #define swprintf _snwprintf #define vswprintf _vsnwprintf #define vfscnaf fscanf int vasprintf( char **sptr, const char *__restrict fmt , va_list ap ); int asprintf( char **sptr, const char *__restrict fmt, ...); //int vfscanf( FILE *__restrict stream, const char *__restrict format, // va_list arg); size_t mbsnrtowcs( wchar_t *__restrict dst, const char **__restrict src, size_t nmc, size_t len, mbstate_t *__restrict ps ); size_t wcsnrtombs( char *__restrict dst, const wchar_t **__restrict src, size_t nwc, size_t len, mbstate_t *__restrict ps ); #if defined(_MSC_VER) #define snprintf _snprintf #include #define atoll _atoi64 #define strtoll _strtoi64 #define strtoull _strtoui64 #define wcstoll _wcstoi64 #define wcstoull _wcstoui64 _LIBCPP_ALWAYS_INLINE float strtof( const char *nptr, char **endptr ) { return _Stof(nptr, endptr, 0); } _LIBCPP_ALWAYS_INLINE double strtod( const char *nptr, char **endptr ) { return _Stod(nptr, endptr, 0); } _LIBCPP_ALWAYS_INLINE long double strtold( const char *nptr, char **endptr ) { return _Stold(nptr, endptr, 0); } #define _Exit _exit #ifndef __clang__ // MSVC-based Clang also defines _MSC_VER #include _LIBCPP_ALWAYS_INLINE int __builtin_popcount(unsigned int x) { static const unsigned int m1 = 0x55555555; //binary: 0101... static const unsigned int m2 = 0x33333333; //binary: 00110011.. static const unsigned int m4 = 0x0f0f0f0f; //binary: 4 zeros, 4 ones ... static const unsigned int h01= 0x01010101; //the sum of 256 to the power of 0,1,2,3... x -= (x >> 1) & m1; //put count of each 2 bits into those 2 bits x = (x & m2) + ((x >> 2) & m2); //put count of each 4 bits into those 4 bits x = (x + (x >> 4)) & m4; //put count of each 8 bits into those 8 bits return (x * h01) >> 24; //returns left 8 bits of x + (x<<8) + (x<<16) + (x<<24) } _LIBCPP_ALWAYS_INLINE int __builtin_popcountl(unsigned long x) { return __builtin_popcount(static_cast(x)); } _LIBCPP_ALWAYS_INLINE int __builtin_popcountll(unsigned long long x) { static const unsigned long long m1 = 0x5555555555555555; //binary: 0101... static const unsigned long long m2 = 0x3333333333333333; //binary: 00110011.. static const unsigned long long m4 = 0x0f0f0f0f0f0f0f0f; //binary: 4 zeros, 4 ones ... static const unsigned long long h01 = 0x0101010101010101; //the sum of 256 to the power of 0,1,2,3... x -= (x >> 1) & m1; //put count of each 2 bits into those 2 bits x = (x & m2) + ((x >> 2) & m2); //put count of each 4 bits into those 4 bits x = (x + (x >> 4)) & m4; //put count of each 8 bits into those 8 bits return static_cast((x * h01)>>56); //returns left 8 bits of x + (x<<8) + (x<<16) + (x<<24) + ... } _LIBCPP_ALWAYS_INLINE int __builtin_ctz( unsigned int x ) { DWORD r = 0; _BitScanReverse(&r, x); return static_cast(r); } // sizeof(long) == sizeof(int) on Windows _LIBCPP_ALWAYS_INLINE int __builtin_ctzl( unsigned long x ) { return __builtin_ctz( static_cast(x) ); } _LIBCPP_ALWAYS_INLINE int __builtin_ctzll( unsigned long long x ) { DWORD r = 0; _BitScanReverse64(&r, x); return static_cast(r); } _LIBCPP_ALWAYS_INLINE int __builtin_clz( unsigned int x ) { DWORD r = 0; _BitScanForward(&r, x); return static_cast(r); } // sizeof(long) == sizeof(int) on Windows _LIBCPP_ALWAYS_INLINE int __builtin_clzl( unsigned long x ) { return __builtin_clz( static_cast(x) ); } _LIBCPP_ALWAYS_INLINE int __builtin_clzll( unsigned long long x ) { DWORD r = 0; _BitScanForward64(&r, x); return static_cast(r); } #endif // !__clang__ #endif // _MSC_VER #endif // _LIBCPP_SUPPORT_WIN32_SUPPORT_H