2.int带符号整型,占64位 题目其实给定的是十进制var num uint32 = 43261596,计算机内存以32位补码形式存储此数,题目说颠倒此数的二进制位,十进制变为2进制:除2取余。
uint32类型转换为IP func UInt32ToIP(intIP uint32) net.IP { var bytes [4]byte bytes[0] = byte(intIP 3] = byte((intIP >> 24) & 0xFF) return net.IPv4(bytes[3], bytes[2], bytes[1], bytes[0]) } IP转换为uint32 类型 func IPToUInt32(ipnr net.IP) uint32 { bits := strings.Split(ipnr.String(), ".") sum += uint32(b0) << 24 sum += uint32(b1) << 16 sum += uint32(b2) << 8 sum += uint32 := IPToUInt32(IP1) fmt.Println(IPUint32) // uint32转换为IP地址 IP2 := UInt32ToIP(IPUint32) fmt.Println
于是,费尽九牛二虎之力,将每个数据都转成uint32的整数,实现代码如下(在网上找的) public static long bytes2int(byte[] src){ int firstByte
leveldb 采用 protocalbuffer 里使用的变长整形编码方案,以节省空间; 一个byte分成两部分:最高1个bit 和 剩余7个bit; 最高1个bit 以用来表示 剩余7个bit 是否能装下uint32
function intTobytes(value){ var a=new Uint8Array(4) a[3]=(value >> 24) & 0xFF
我们都知道,C语言的基本类型就char, short, int 等。但是我们在看其他源码时经常碰到int32_t, int8_t这种形式的定义,他们是什么呢。其实他们就是基本类型的typedef重定义。 也就是不同平台下,使用以下名称可以保证固定长度。 1字节 int8_t —— char 2字节 int16_t —— short 4字节 int32_t —— int 8字节 int64_t —— long long
fmt.Println("不同无符号int类型占用的字节数大小:") var i1 uint = 1 var i2 uint8 = 2 var i3 uint16 = 3 var i4 uint32 fmt.Printf("uint8 : %v\n", unsafe.Sizeof(i2)) fmt.Printf("uint16 : %v\n", unsafe.Sizeof(i3)) fmt.Printf("uint32 unsafe.Sizeof(i4)) fmt.Printf("uint64 : %v\n", unsafe.Sizeof(i5)) } 测试结果: uint : 8 uint8 : 1 uint16 : 2 uint32 fmt.Println("uint8:", 0, "~", math.MaxUint8) fmt.Println("uint16:", 0, "~", math.MaxUint16) fmt.Println("uint32 "~", math.MaxUint64) fmt.Println() } 测试结果 === RUN TestUintRange uint8: 0 ~ 255 uint16: 0 ~ 65535 uint32
unsigned char, unsigned int, uint32_t, size_t, uint64_t, unsigned long int,
几年前给公司前台业务一个QPS很高的接口做了一个优化,主要请求来源是当前在线用户,接口核心逻辑就是从codis中根据一个数字查询对应的用户id(小于1亿),这两个数字的映射关系是不变的,可以理解为codis中有一个map[uint32 ]uint32的映射表,这个映射表只增不改。 因此结合业务逻辑决定引入了一个支持LRU淘汰策略的uint32 -> uint32的高性能缓存组件。 一个lruBucket有8个lru值,采用uint32存储,每4bit存储bucket对应的每个K-V对的lru值。 2.2 写流程 func (c *IntCache) Set(key uint32, value uint32) { if key == 0 && value == 0 { panic
sequences uint32 ofsAnimations; //offset to animation sequences uint32 nC; uint32 to bones uint32 nF; //bone lookup table uint32 ofsF; uint32 nVertices uint32 nAttachments; uint32 ofsAttachments; uint32 nAttachLookup; uint32 ofsAttachLookup ; uint32 nQ; uint32 ofsQ; uint32 nLights; //number of lights uint32 uint32 ofsCameras; //offset to cameras uint32 nT; uint32 ofsT; uint32 nRibbonEmitters
S16; UINT32 S17; UINT32 S18; UINT32 S19; UINT32 S20; UINT32 S21; UINT32 S22; UINT32 S23; UINT32 S24; UINT32 S25; UINT32 S26; UINT32 S27; UINT32 S28; UINT32 S29; UINT32 S30; UINT32 S31;#endif UINT32 uwR4; UINT32 uwR5; UINT32 uwR6; UINT32 uwR7; UINT32 S0; UINT32 S1; UINT32 S2; UINT32 S3; UINT32 S4; UINT32 S5; UINT32 S6; UINT32 S7 ; UINT32 S8; UINT32 S9; UINT32 S10; UINT32 S11; UINT32 S12; UINT32 S13; UINT32 S14
local_offset, local_length uint32 } type prefixIndex struct { start_index, end_index uint32 firstStartIpOffset uint32 prefixStartOffset uint32 prefixEndOffset uint32 prefixCount , high uint32, k uint32) uint32 { var M uint32 = 0 for low <= high { mid := (low + high uint32(a) b1 := uint32(b) c1 := uint32(c) d1 := uint32(d) return (a1 & 0xFF) | ((b1 < { a1 := uint32(a) b1 := uint32(b) c1 := uint32(c) return (a1 & 0xFF) | ((b1 << 8) &
private static UInt32 G(UInt32 x, UInt32 y, UInt32 z) { return (x & z) | (y & (~z private static void FF(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti) a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti) { a = a + G(b, c, a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti) { a = a + H(b, c, a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti) { a = a + I(b, c,
RGBAPACK_8bit(float red, float green, float blue, uint32 alpha) { uint32 ARGBpixel = 0; )blue) | (((uint32)green) << 8) | (((uint32)red) << 16) | (uint32 )blue >> 2) | (((uint32)green >> 2) << 8) | (((uint32)red >> uint32 *dstImage, size_t nDestPitch, uint32 width, uint32 height , y; uint32 yuv101010Pel[2]; uint32 processingPitch = ((width) + 63) & ~63; uint32 dstImagePitch
prefix = fread(myFile, 1, 'uint32'); prefix = fread(myFile, 1, 'uint32'); wfn.step = fread(myFile, 1, = fread(myFile, 1, 'uint32'); wfn.trans=fread(myFile, 1, 'uint32')%这个数据是我手动添加的; wfn.spin=fread(myFile , 1, 'uint32')%这个数据也是手动添加; fread(myFile, 2, 'uint32'); % i_1's含义是不是读取两行数据? prefix = fread(myFile, 1, 'uint32'); fread(myFile, prefix/4, 'uint32'); % i_1's prefix = fread(myFile , 1, 'uint32'); prefix = fread(myFile, 1, 'uint32'); fread(myFile, prefix/8, 'double'); % one's prefix
// 主协议 Protocol2 uint32 // 子协议 WenTiID string // 问答的ID OpenID string // 提问者的openid // 主协议 Protocol2 uint32 // 子协议 IS_Succ bool // 是否成功 } // 数据更新操作的说明 // ------------------ // 主协议 Protocol2 uint32 // 子协议 OpenID string // 用户的唯一凭证 Data string // 组合数据发过来-- // 主协议 Protocol2 uint32 // 子协议 IS_Succ bool // 是否成功 } // 数据更新操作的说明 // ------------------ // 主协议 Protocol2 uint32 // 子协议 Code string // 1:表示邀请码已经使用,2:邀请码不存在,3:申请成功,4:已经申请中 } //-
STATIC INLINE UINT32 OsArmReadTtbr(VOID){ UINT32 val; __asm__ volatile("mrc p15, 0, %0, c2,c0,0 __asm__ volatile("isb" ::: "memory");}STATIC INLINE UINT32 OsArmReadTtbr1(VOID){ UINT32 val; __ STATIC INLINE UINT32 OsArmReadBpiall(VOID){ UINT32 val; __asm__ volatile("mrc p15, 0, %0, c7,c5,6 STATIC INLINE UINT32 OsArmReadContextidr(VOID){ UINT32 val; __asm__ volatile("mrc p15, 0, %0, c13 ⑷处把这里先把asid切到内核空间的IDVOID LOS_ArchMmuContextSwitch(LosArchMmu *archMmu){ UINT32 ttbr;⑴ UINT32 ttbcr
(b)] = new int32[][](uint32(n));for (int32 c = 0; c < n; c++) { dp[uint32(a)][uint32 (b)] [uint32(c)] = new int32[](uint32(m));for (int32 d = 0; d < m; d++) {dp[uint32(a)][uint32(b)] [uint32 (row)][uint32(col)][uint32(r)][uint32(c)] ! = -1) {return dp[uint32(row)][uint32(col)][uint32(r)][uint32(c)];}int32 p1 = process3(arr, n, m, row, = 2147483647) {p2 = 1 + next2;}int32 ans = min(p1, p2);dp[uint32(row)][uint32(col)][uint32(r)][uint32
(i)][uint32(j)] == 1) { if (i > 0 && map[uint32(i - 1)][uint32(j)] == 1) { return } } status |= map[uint32(i)][uint32(j)] *leftk(j); } arr[uint32 int32 j = 0; j < m; j++) { dp[uint32(i)][uint32(j)] = new int32[](uint32(s)); for (int32 k = 0; k < s; k++) { dp[uint32(i)][uint32(j)][uint32(k)] = -2; } } (i)][uint32(j)][uint32(status)] !
'NPK0' // magic number uint32 blockLen // number of following bytes in block uint32 dataOffset 'DIR_' // magic number of directory block uint32 blockLen // number of following bytes 'FILE' // magic number of file block uint32 blockLen // number of following bytes in block uint32 fileOffset // start of file data inside data block uint32 fileLength in block (0) } # the data block block DATA { uint32 'DATA' // magic number of data block