void serializeu64(unsigned long long i,char buf[]) { unsigned long long mask ...
S argument_type; typedef std::size_t result_type; result_type operator()(argument_type...S argument_type; typedef std::size_t result_type; result_type operator()(argument_type...T argument_type; typedef std::size_t result_type; result_type operator()(argument_type...= 0; uint64_t *p = (uint64_t*) std::addressof(t); uint64_t *const u...= p + obj_size/sizeof(uint64_t); const int tail=obj_size % sizeof(uint64_t);
alloc; unsigned char flags; char buf[]; }; struct __attribute__ ((__packed__)) sdshdr64 { uint64..._t len; uint64_t alloc; unsigned char flags; char buf[]; }; 2.2 List (1)使用 127.0.0.1:6379...struct dictEntry { void *key; union { void *val; uint64_t u64; int64...{ uint64_t (*hashFunction)(const void *key); void *(*keyDup)(void *privdata, const void *key)...)(void *privdata, void *key); void (*valDestructor)(void *privdata, void *obj); } dictType; /* 这是哈希表结构
简单来说,uint8_t / uint16_t / uint32_t /uint64_t这些数据类型都只是别名而来,具体如下: 一、C语言数据基本类型 在C语言中有6种基本数据类型:short、int、...char 1)整型:short int、int、long int 2)浮点型:float、double 3)字符类型:char ---- 二、分析uint8_t\uint_16_t\uint32_t\uint64...2、typedef:typedef用来定义关键字或标识符的别名 3、使用原因:方便代码的维护。..._t; typedef unsigned __INT64 uint64_t; /* 7.18.1.2 */ /* smallest type of at least n bits */ /..._t %u 3)uint64_t %llu 6、uint8_t类型的输出: typedef unsigned char uint8_t;//将uint8_t别名为无符号字符型 uint8_t buf
1、输出uint32_t uint32_t a = 888; printf("a is %ld", a); 2、输出uint64_t uint64_t b = 888; printf("b is
回顾 typedef用来定义关键字或标识符的别名,例如: typedef double wages; typedef wages salary; 三、uint8_t\uint_16_t\uint32_t...\uint64_t 1、这些类型的来源:这些数据类型中都带有_t, _t 表示这些数据类型是通过typedef定义的,而不是新的数据类型。...最好用一个typedef来定义一个统一的bool: typedef char bool; 在涉及到跨平台时,不同的平台会有不同的字长,所以利用预编译和typedef可以方便的维护代码。...uint64_t; #else __extension__ typedef unsigned long long int uint64_t; #endif 4、格式化输出: uint16..._t %hu uint32_t %u uint64_t %llu 5 、uint8_t类型的输出: 注意uint8_t的定义为 typedef unsigned char uint8
如: a> 当某个数据不可能为负数时我们一定要考虑用以下类型: unsigned char, unsigned int, uint32_t, size_t, uint64_t, unsigned long...我们都知道linux C开发中的常见扩展数据类型的定义有:uint8_t, uint16_t, uint32_t, uint64_t, size_t, ssize_t, off_t …....为了程序的可扩展性, 假如将来我们需要的数据大小变成了64bit时,我们只需要将typedef long long size_t就可以了, 不然我们可要修改好多好多的地方了.这种设计我们同样可以应用到自己的开发中来...stdint.h —————————– typedef unsigned int uint32_t; uint32_t.c —————————– #include #if 0 #...include // uint32_t #endif typedef unsigned int uint32_t; typedef unsignedlong long uint64_
; uint64_t v1 = 0x646f72616e646f6dULL; uint64_t v2 = 0x6c7967656e657261ULL; uint64_t v3 =...0x7465646279746573ULL; uint64_t k0 = U8TO64_LE(k); uint64_t k1 = U8TO64_LE(k + 8); uint64...dictionary has two of this as we * implement incremental rehashing, for the old to the new table. */ typedef...table总大小 unsigned long sizemask; //掩码 unsigned long used; //记录开的链里面有几个节点 } dictht; ---- 单个节点 typedef...如: 存数据键值对的时候,用val; 存过期时间的时候,用s64; ---- 容量变化 先说说扩容吧,拿源码直接看: typedef struct dict { dictType *type;
Platform-specific functions and macros // Microsoft Visual Studio #if defined(_MSC_VER) && (_MSC_VER < 1600) typedef...unsigned char uint8_t; typedef unsigned int uint32_t; typedef unsigned __int64 uint64_t; // Other..._t h1 = seed; uint64_t h2 = seed; const uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);...[14]) << 48; case 14: k2 ^= ((uint64_t)tail[13]) << 40; case 13: k2 ^= ((uint64_t)tail...[10]) << 16; case 10: k2 ^= ((uint64_t)tail[ 9]) << 8; case 9: k2 ^= ((uint64_t)tail
对于这两个数据结构域不了解的可以看一下这个系列前两篇 typedef struct stream { rax *rax; //存放消息内容,由于消息ID由时间戳开头,会存在大量的重复...struct streamID { uint64_t ms; /* Unix time in milliseconds. */ uint64_t seq; /...StreamCG 存储的是消费组信息,和上面Stream差不多意思: /* Consumer group. */ typedef struct streamCG { streamID last_id.../* A specific consumer in a consumer group. */ typedef struct streamConsumer { mstime_t seen_time...裁剪信息流 这是什么意思?举个例子:我只留最近十条信息。就是这个意思。
老板来了: 糖糖小伙,你搞C语言嵌入式开发这么久了,我来考考你u8、u16、u32、s8、s16、s32是什么意思啊?...signed char int8_t; typedef short int16_t; typedef long int32_t; typedef long long int64_t; typedef...long long uint64_t; stm32f10x.h文件 中: /*!...< Read Only */ typedef uint32_t u32; typedef uint16_t u16; typedef uint8_t u8; typedef const uint32..._t s32; typedef uint32_t u32; typedef int64_t s64; typedef uint64_t u64
__int8 int8_t; typedef __int16 int16_t; typedef __int32 int32_t; typedef __int64 int64_t; typedef...unsigned __int64 uint64_t; /* 7.18.1.2 Minimum-width integer types */ typedef __int8 int_least8...typedef uint64_t uintmax_t; /* 7.18.2.1 Limits of exact-width integer types */ #define INT8...define UINT16_MAX ((uint16_t) 65535) #define UINT32_MAX ((uint32_t) 4294967295) #define UINT64_MAX ((uint64...) x) #define UINT16_C(x) ((uint16_t) x) #define UINT32_C(x) ((uint32_t) x) #define UINT64_C(x) ((uint64
这是我找到最多的答案,估计是程序员想自黑还是说这个带大家步入了代码的世界。...define ENTRY(a,b) static void b(void); STATE_TABLE #undef ENTRY 用来获取函数中的可变参数,具体用法可参加printf的源码实现 typedef...,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) #define va_end(ap) ( ap = (va_list)0 ) 这是算...64位里有多少个bit是1的 const uint64_t m1 = 0x5555555555555555; //binary: 0101... const uint64_t m2 = 0x3333333333333333...uint64_t m8 = 0x00ff00ff00ff00ff; //binary: 8 zeros, 8 ones ... const uint64_t m16 = 0x0000ffff0000ffff
83011982 在vs2017的编译器里,可以直接识别 int8_t、int16_t、int32_t、int64_t、uint8_t、uint16_t、uint32_t、uint64...int16_t; typedef int int32_t; typedef long long int64_t; typedef unsigned char...uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; typedef unsigned...long long uint64_t; typedef signed char int_least8_t; typedef short int_least16..._t; typedef int int_least32_t; typedef long long int_least64_t; typedef unsigned
MurmurHash2 apply here - beware of alignment // and endian-ness issues if used across multiple platforms. typedef...unsigned long int uint64_t; // 64-bit hash for 64-bit platforms uint64_t MurmurHash64A ( const void..._t h = seed ^ (len * m); const uint64_t * data = (const uint64_t *)key; const uint64_t * end = data +...uint64_t(data2[5]) << 40; case 5: h ^= uint64_t(data2[4]) << 32; case 4: h ^= uint64_t(data2[3]) << 24...; case 3: h ^= uint64_t(data2[2]) << 16; case 2: h ^= uint64_t(data2[1]) << 8; case 1: h ^= uint64_t(
virtual ~entity_i(){} uint64_t id() const { return m_id; } protected: uint64_t m_id; }; 事件基类...class event_store_mem_t: public event_store_i { typedef vector event_record_t...; typedef map entity_event_map_t; struct snapshot_info_t...{ long event_version; string data; }; typedef vector...entity_record_t; typedef mapentity_snapshot_map_t; public: event_store_mem_t
, int iidx, int n1, int n2> class xoshinro_engine { public: typedef...xoshinro_engine base_type; typedef typename base_type::..._t, is_plus, 1, 17, 45> { public: typedef xoshinro_engine base_type; typedef typename base_type::result_type result_type...; typedef typename base_type::seed_type seed_type; public
dev-B).M2包含了2个物理虚拟磁盘(dev-C和dev-D).pool的顶层是root vdev.其数据结构把无关的字段去掉后,如下 struct vdev { // 当前vdev的唯一标识 uint64...// 当前vdev的父节点 vdev_t *vdev_parent; // 当前vdev的子节点数组 vdev_t **vdev_child; // 当前vdev子节点的个数 uint64...struct vdev_label是用来描述vdev_label的信息,具体定义如下: typedef struct vdev_label { // 填充 char vl_pad1[VDEV_PAD_SIZE...blkptr_t在zfs中定义如下: typedef struct blkptr { // 给定文件名称来确定在vdev中的数据指针(包括了vdev + offset) dva_t blk_dva...[SPA_DVAS_PER_BP]; uint64_t blk_prop; /* size, compression, type, etc */ uint64_t blk_pad[2];
我们先看程序表头的数据结构: typedef struct { unit32_t p_type; #数据类型 uint332_t p_flags; #标志位 uint64..._t p_offset; #在ELF文件中的偏移 uint64_t p_vaddr; #虚拟地址 uint64_t p_paddr; #物理地址 uint64_t p_fllesz...; #在硬盘上的大小 uint64_t p_memsz; #在内存中大小 uint64_t p_align; #内存对齐方式 } Elf64_Phdr; 使用命令 readelf...这是因为有些段在硬盘上不占据容量,只有加载到内存时才分配容量。...基本上所有版本的Linux都会附带这个代码库,该代码库提供了一个类叫Binary,用于对可执行二进制文件的抽象,同时还有Section类,它是对前面我们提到的段数据结构的抽象;同时它还提供Symbol类,这是对符号表的抽象
uint8_t / uint16_t / uint32_t /uint64_t 是什么数据类型 在nesc的代码中,你会看到很多你不认识的数据类型,比如uint8_t等。...它就是一个结构的标注,可以理解为type/typedef的缩写,表示它是通过typedef定义的,而不是其它数据类型。...不过,不要小看了typedef,它对于你代码的维护会有很好的作用。...比如C中没有bool,于是在一个软件中,一些程序员使用int,一些程序员使用short,会比较混乱,最好就是用一个typedef来定义,如: typedef char bool; 一般来说,一个C的工程中一定要做一些这方面的工作...按照posix标准,一般整形对应的*_t类型为: 1字节 uint8_t 2字节 uint16_t 4字节 uint32_t 8字节 uint64_t 附:C99
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