stdint.h头文件是什么，里面的内容有什么 |
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stdint.h头文件是什么，里面的内容有什么
一，是什么二、干什么三、大数输出四、内容方式①方式②
一，是什么
stdint.h是c99中引进的一个标准C库的头文件. 二、干什么stdint.h中定义了一些整数类型，规则如下(其中N可以为8，16，32，64) intN_t, int_leastN_t, int_fastN_t表示长度为N位的整型数； uintN_t, uint_leastN_t, uint_fastN_t表示长度为N位的无符号整型数 ； stdint.h中的常量，定义以上各类型数的最大最小值(其中N可以为8，16，32，64) INTN_MIN, UINTN_MIN, INTN_MAX, UINTN_MAX ; INT_LEASEN_MIN, INT_LEASEN_MAX ; INT_FASTN_MIN, INT_FASTN_MAX ; 以上类型的C++类型定义等 三、大数输出int64_t数的输出：%lld ; uint64_t数的输出：%llu ; uint64_t数十六进制输出：%llx ; uint64_t数八进制输出：%llo ; 按照posix标准，一般整型对应的*_t类型为： 1字节 uint8_t 2字节 uint16_t 4字节 uint32_t 8字节 uint64_t 四、内容 方式① /* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ /* * ISO C99: 7.18 Integer types */ #ifndef _STDINT_H #define _STDINT_H 1 #include #include #include /* Exact integral types. */ /* Signed. */ /* There is some amount of overlap with as known by inet code */ #ifndef __int8_t_defined # define __int8_t_defined typedef signed char int8_t; typedef short int int16_t; typedef int int32_t; # if __WORDSIZE == 64 typedef long int int64_t; # else __extension__ typedef long long int int64_t; # endif #endif /* Unsigned. */ typedef unsigned char uint8_t; typedef unsigned short int uint16_t; #ifndef __uint32_t_defined typedef unsigned int uint32_t; # define __uint32_t_defined #endif #if __WORDSIZE == 64 typedef unsigned long int uint64_t; #else __extension__ typedef unsigned long long int uint64_t; #endif /* Small types. */ /* Signed. */ typedef signed char int_least8_t; typedef short int int_least16_t; typedef int int_least32_t; #if __WORDSIZE == 64 typedef long int int_least64_t; #else __extension__ typedef long long int int_least64_t; #endif /* Unsigned. */ typedef unsigned char uint_least8_t; typedef unsigned short int uint_least16_t; typedef unsigned int uint_least32_t; #if __WORDSIZE == 64 typedef unsigned long int uint_least64_t; #else __extension__ typedef unsigned long long int uint_least64_t; #endif /* Fast types. */ /* Signed. */ typedef signed char int_fast8_t; #if __WORDSIZE == 64 typedef long int int_fast16_t; typedef long int int_fast32_t; typedef long int int_fast64_t; #else typedef int int_fast16_t; typedef int int_fast32_t; __extension__ typedef long long int int_fast64_t; #endif /* Unsigned. */ typedef unsigned char uint_fast8_t; #if __WORDSIZE == 64 typedef unsigned long int uint_fast16_t; typedef unsigned long int uint_fast32_t; typedef unsigned long int uint_fast64_t; #else typedef unsigned int uint_fast16_t; typedef unsigned int uint_fast32_t; __extension__ typedef unsigned long long int uint_fast64_t; #endif /* Types for `void *' pointers. */ #if __WORDSIZE == 64 # ifndef __intptr_t_defined typedef long int intptr_t; # define __intptr_t_defined # endif typedef unsigned long int uintptr_t; #else # ifndef __intptr_t_defined typedef int intptr_t; # define __intptr_t_defined # endif typedef unsigned int uintptr_t; #endif /* Largest integral types. */ #if __WORDSIZE == 64 typedef long int intmax_t; typedef unsigned long int uintmax_t; #else __extension__ typedef long long int intmax_t; __extension__ typedef unsigned long long int uintmax_t; #endif /* The ISO C99 standard specifies that in C++ implementations these macros should only be defined if explicitly requested. */ #if !defined __cplusplus || defined __STDC_LIMIT_MACROS # if __WORDSIZE == 64 # define __INT64_C(c) c ## L # define __UINT64_C(c) c ## UL # else # define __INT64_C(c) c ## LL # define __UINT64_C(c) c ## ULL # endif /* Limits of integral types. */ /* Minimum of signed integral types. */ # define INT8_MIN (-128) # define INT16_MIN (-32767-1) # define INT32_MIN (-2147483647-1) # define INT64_MIN (-__INT64_C(9223372036854775807)-1) /* Maximum of signed integral types. */ # define INT8_MAX (127) # define INT16_MAX (32767) # define INT32_MAX (2147483647) # define INT64_MAX (__INT64_C(9223372036854775807)) /* Maximum of unsigned integral types. */ # define UINT8_MAX (255) # define UINT16_MAX (65535) # define UINT32_MAX (4294967295U) # define UINT64_MAX (__UINT64_C(18446744073709551615)) /* Minimum of signed integral types having a minimum size. */ # define INT_LEAST8_MIN (-128) # define INT_LEAST16_MIN (-32767-1) # define INT_LEAST32_MIN (-2147483647-1) # define INT_LEAST64_MIN (-__INT64_C(9223372036854775807)-1) /* Maximum of signed integral types having a minimum size. */ # define INT_LEAST8_MAX (127) # define INT_LEAST16_MAX (32767) # define INT_LEAST32_MAX (2147483647) # define INT_LEAST64_MAX (__INT64_C(9223372036854775807)) /* Maximum of unsigned integral types having a minimum size. */ # define UINT_LEAST8_MAX (255) # define UINT_LEAST16_MAX (65535) # define UINT_LEAST32_MAX (4294967295U) # define UINT_LEAST64_MAX (__UINT64_C(18446744073709551615)) /* Minimum of fast signed integral types having a minimum size. */ # define INT_FAST8_MIN (-128) # if __WORDSIZE == 64 # define INT_FAST16_MIN (-9223372036854775807L-1) # define INT_FAST32_MIN (-9223372036854775807L-1) # else # define INT_FAST16_MIN (-2147483647-1) # define INT_FAST32_MIN (-2147483647-1) # endif # define INT_FAST64_MIN (-__INT64_C(9223372036854775807)-1) /* Maximum of fast signed integral types having a minimum size. */ # define INT_FAST8_MAX (127) # if __WORDSIZE == 64 # define INT_FAST16_MAX (9223372036854775807L) # define INT_FAST32_MAX (9223372036854775807L) # else # define INT_FAST16_MAX (2147483647) # define INT_FAST32_MAX (2147483647) # endif # define INT_FAST64_MAX (__INT64_C(9223372036854775807)) /* Maximum of fast unsigned integral types having a minimum size. */ # define UINT_FAST8_MAX (255) # if __WORDSIZE == 64 # define UINT_FAST16_MAX (18446744073709551615UL) # define UINT_FAST32_MAX (18446744073709551615UL) # else # define UINT_FAST16_MAX (4294967295U) # define UINT_FAST32_MAX (4294967295U) # endif # define UINT_FAST64_MAX (__UINT64_C(18446744073709551615)) /* Values to test for integral types holding `void *' pointer. */ # if __WORDSIZE == 64 # define INTPTR_MIN (-9223372036854775807L-1) # define INTPTR_MAX (9223372036854775807L) # define UINTPTR_MAX (18446744073709551615UL) # else # define INTPTR_MIN (-2147483647-1) # define INTPTR_MAX (2147483647) # define UINTPTR_MAX (4294967295U) # endif /* Minimum for largest signed integral type. */ # define INTMAX_MIN (-__INT64_C(9223372036854775807)-1) /* Maximum for largest signed integral type. */ # define INTMAX_MAX (__INT64_C(9223372036854775807)) /* Maximum for largest unsigned integral type. */ # define UINTMAX_MAX (__UINT64_C(18446744073709551615)) /* Limits of other integer types. */ /* Limits of `ptrdiff_t' type. */ # if __WORDSIZE == 64 # define PTRDIFF_MIN (-9223372036854775807L-1) # define PTRDIFF_MAX (9223372036854775807L) # else # define PTRDIFF_MIN (-2147483647-1) # define PTRDIFF_MAX (2147483647) # endif /* Limits of `sig_atomic_t'. */ # define SIG_ATOMIC_MIN (-2147483647-1) # define SIG_ATOMIC_MAX (2147483647) /* Limit of `size_t' type. */ # if __WORDSIZE == 64 # define SIZE_MAX (18446744073709551615UL) # else # define SIZE_MAX (4294967295U) # endif /* Limits of `wchar_t'. */ # ifndef WCHAR_MIN /* These constants might also be defined in . */ # define WCHAR_MIN __WCHAR_MIN # define WCHAR_MAX __WCHAR_MAX # endif /* Limits of `wint_t'. */ # define WINT_MIN (0u) # define WINT_MAX (4294967295u) #endif /* C++ && limit macros */ /* The ISO C99 standard specifies that in C++ implementations these should only be defined if explicitly requested. */ #if !defined __cplusplus || defined __STDC_CONSTANT_MACROS /* Signed. */ # define INT8_C(c) c # define INT16_C(c) c # define INT32_C(c) c # if __WORDSIZE == 64 # define INT64_C(c) c ## L # else # define INT64_C(c) c ## LL # endif /* Unsigned. */ # define UINT8_C(c) c ## U # define UINT16_C(c) c ## U # define UINT32_C(c) c ## U # if __WORDSIZE == 64 # define UINT64_C(c) c ## UL # else # define UINT64_C(c) c ## ULL # endif /* Maximal type. */ # if __WORDSIZE == 64 # define INTMAX_C(c) c ## L # define UINTMAX_C(c) c ## UL # else # define INTMAX_C(c) c ## LL # define UINTMAX_C(c) c ## ULL # endif #endif /* C++ && constant macros */ #endif /* stdint.h */ 方式② /* Copyright (C) ARM Ltd., 1999 */ /* All rights reserved */ /* * RCS $Revision: 180721 $ * Checkin $Date: 2013-06-24 09:41:57 +0100 (Mon, 24 Jun 2013) $ * Revising $Author: agrant $ */ #ifndef __stdint_h #define __stdint_h #define __ARMCLIB_VERSION 5040049 /* * Depending on compiler version __int64 or __INT64_TYPE__ should be defined. */ #ifndef __int64 #ifdef __INT64_TYPE__ #define __int64 __INT64_TYPE__ #endif /* On some architectures neither of these may be defined - if so, fall through and error out if used. */ #endif #ifndef __STDINT_DECLS #define __STDINT_DECLS #undef __CLIBNS #ifdef __cplusplus namespace std { #define __CLIBNS std:: extern "C" { #else #define __CLIBNS #endif /* __cplusplus */ /* * 'signed' is redundant below, except for 'signed char' and if * the typedef is used to declare a bitfield. * '__int64' is used instead of 'long long' so that this header * can be used in --strict mode. */ /* 7.18.1.1 */ /* exact-width signed integer types */ typedef signed char int8_t; typedef signed short int int16_t; typedef signed int int32_t; typedef signed __int64 int64_t; /* exact-width unsigned integer types */ typedef unsigned char uint8_t; typedef unsigned short int uint16_t; typedef unsigned int uint32_t; typedef unsigned __int64 uint64_t; /* 7.18.1.2 */ /* smallest type of at least n bits */ /* minimum-width signed integer types */ typedef signed char int_least8_t; typedef signed short int int_least16_t; typedef signed int int_least32_t; typedef signed __int64 int_least64_t; /* minimum-width unsigned integer types */ typedef unsigned char uint_least8_t; typedef unsigned short int uint_least16_t; typedef unsigned int uint_least32_t; typedef unsigned __int64 uint_least64_t; /* 7.18.1.3 */ /* fastest minimum-width signed integer types */ typedef signed int int_fast8_t; typedef signed int int_fast16_t; typedef signed int int_fast32_t; typedef signed __int64 int_fast64_t; /* fastest minimum-width unsigned integer types */ typedef unsigned int uint_fast8_t; typedef unsigned int uint_fast16_t; typedef unsigned int uint_fast32_t; typedef unsigned __int64 uint_fast64_t; /* 7.18.1.4 integer types capable of holding object pointers */ typedef signed int intptr_t; typedef unsigned int uintptr_t; /* 7.18.1.5 greatest-width integer types */ typedef signed __int64 intmax_t; typedef unsigned __int64 uintmax_t; #if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) /* 7.18.2.1 */ /* minimum values of exact-width signed integer types */ #define INT8_MIN -128 #define INT16_MIN -32768 #define INT32_MIN (~0x7fffffff) /* -2147483648 is unsigned */ #define INT64_MIN __ESCAPE__(~0x7fffffffffffffffll) /* -9223372036854775808 is unsigned */ /* maximum values of exact-width signed integer types */ #define INT8_MAX 127 #define INT16_MAX 32767 #define INT32_MAX 2147483647 #define INT64_MAX __ESCAPE__(9223372036854775807ll) /* maximum values of exact-width unsigned integer types */ #define UINT8_MAX 255 #define UINT16_MAX 65535 #define UINT32_MAX 4294967295u #define UINT64_MAX __ESCAPE__(18446744073709551615ull) /* 7.18.2.2 */ /* minimum values of minimum-width signed integer types */ #define INT_LEAST8_MIN -128 #define INT_LEAST16_MIN -32768 #define INT_LEAST32_MIN (~0x7fffffff) #define INT_LEAST64_MIN __ESCAPE__(~0x7fffffffffffffffll) /* maximum values of minimum-width signed integer types */ #define INT_LEAST8_MAX 127 #define INT_LEAST16_MAX 32767 #define INT_LEAST32_MAX 2147483647 #define INT_LEAST64_MAX __ESCAPE__(9223372036854775807ll) /* maximum values of minimum-width unsigned integer types */ #define UINT_LEAST8_MAX 255 #define UINT_LEAST16_MAX 65535 #define UINT_LEAST32_MAX 4294967295u #define UINT_LEAST64_MAX __ESCAPE__(18446744073709551615ull) /* 7.18.2.3 */ /* minimum values of fastest minimum-width signed integer types */ #define INT_FAST8_MIN (~0x7fffffff) #define INT_FAST16_MIN (~0x7fffffff) #define INT_FAST32_MIN (~0x7fffffff) #define INT_FAST64_MIN __ESCAPE__(~0x7fffffffffffffffll) /* maximum values of fastest minimum-width signed integer types */ #define INT_FAST8_MAX 2147483647 #define INT_FAST16_MAX 2147483647 #define INT_FAST32_MAX 2147483647 #define INT_FAST64_MAX __ESCAPE__(9223372036854775807ll) /* maximum values of fastest minimum-width unsigned integer types */ #define UINT_FAST8_MAX 4294967295u #define UINT_FAST16_MAX 4294967295u #define UINT_FAST32_MAX 4294967295u #define UINT_FAST64_MAX __ESCAPE__(18446744073709551615ull) /* 7.18.2.4 */ /* minimum value of pointer-holding signed integer type */ #define INTPTR_MIN (~0x7fffffff) /* maximum value of pointer-holding signed integer type */ #define INTPTR_MAX 2147483647 /* maximum value of pointer-holding unsigned integer type */ #define UINTPTR_MAX 4294967295u /* 7.18.2.5 */ /* minimum value of greatest-width signed integer type */ #define INTMAX_MIN __ESCAPE__(~0x7fffffffffffffffll) /* maximum value of greatest-width signed integer type */ #define INTMAX_MAX __ESCAPE__(9223372036854775807ll) /* maximum value of greatest-width unsigned integer type */ #define UINTMAX_MAX __ESCAPE__(18446744073709551615ull) /* 7.18.3 */ /* limits of ptrdiff_t */ #define PTRDIFF_MIN (~0x7fffffff) #define PTRDIFF_MAX 2147483647 /* limits of sig_atomic_t */ #define SIG_ATOMIC_MIN (~0x7fffffff) #define SIG_ATOMIC_MAX 2147483647 /* limit of size_t */ #define SIZE_MAX 4294967295u /* limits of wchar_t */ /* NB we have to undef and redef because they're defined in both * stdint.h and wchar.h */ #undef WCHAR_MIN #undef WCHAR_MAX #if defined(__WCHAR32) || (defined(__ARM_SIZEOF_WCHAR_T) && __ARM_SIZEOF_WCHAR_T == 4) #define WCHAR_MIN 0 #define WCHAR_MAX 0xffffffffU #else #define WCHAR_MIN 0 #define WCHAR_MAX 65535 #endif /* limits of wint_t */ #define WINT_MIN (~0x7fffffff) #define WINT_MAX 2147483647 #endif /* __STDC_LIMIT_MACROS */ #if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) /* 7.18.4.1 macros for minimum-width integer constants */ #define INT8_C(x) (x) #define INT16_C(x) (x) #define INT32_C(x) (x) #define INT64_C(x) __ESCAPE__(x ## ll) #define UINT8_C(x) (x ## u) #define UINT16_C(x) (x ## u) #define UINT32_C(x) (x ## u) #define UINT64_C(x) __ESCAPE__(x ## ull) /* 7.18.4.2 macros for greatest-width integer constants */ #define INTMAX_C(x) __ESCAPE__(x ## ll) #define UINTMAX_C(x) __ESCAPE__(x ## ull) #endif /* __STDC_CONSTANT_MACROS */ #ifdef __cplusplus } /* extern "C" */ } /* namespace std */ #endif /* __cplusplus */ #endif /* __STDINT_DECLS */ #ifdef __cplusplus #ifndef __STDINT_NO_EXPORTS using ::std::int8_t; using ::std::int16_t; using ::std::int32_t; using ::std::int64_t; using ::std::uint8_t; using ::std::uint16_t; using ::std::uint32_t; using ::std::uint64_t; using ::std::int_least8_t; using ::std::int_least16_t; using ::std::int_least32_t; using ::std::int_least64_t; using ::std::uint_least8_t; using ::std::uint_least16_t; using ::std::uint_least32_t; using ::std::uint_least64_t; using ::std::int_fast8_t; using ::std::int_fast16_t; using ::std::int_fast32_t; using ::std::int_fast64_t; using ::std::uint_fast8_t; using ::std::uint_fast16_t; using ::std::uint_fast32_t; using ::std::uint_fast64_t; using ::std::intptr_t; using ::std::uintptr_t; using ::std::intmax_t; using ::std::uintmax_t; #endif #endif /* __cplusplus */ #endif /* __stdint_h */ /* end of stdint.h */ |
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