stm32HAL库里为什么给同一种数据类型那么多名字？

虎啸 · 发表于 2017-3-19 22:24:22

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 */
#if __sizeof_ptr == 8
typedef signed    __INT64 intptr_t;
typedef unsigned    __INT64 uintptr_t;
#else
typedef signed          int intptr_t;
typedef unsigned          int uintptr_t;
#endif
/* 7.18.1.5 greatest-width integer types */
typedef signed    __LONGLONG intmax_t;
typedef unsigned    __LONGLONG uintmax_t;