字符串的各种操作

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/****************************************************************************** Function  : 字符串各种操作函数* Author    : Mike--->欢迎咨询单片机培训* 淘宝店铺  : https://shop114292239.taobao.com* SCDN      : http://blog.csdn.net/beyondmike *  QQ       : 276678408* Email     : [e-mail]  * Copyright : 版权归 Mike 所有，请保留本人著作权，勿随意修改、随意发布，未经              允许不得用于其他商业用途*****************************************************************************/#define u8                  unsigned char  u8 char_to_hex(u8 c) //字符转HEX{    if(c >= 'A' && c <= 'F') {        c = c - 'A' + 10;    } else if(c >= 'a' && c <= 'f') {        c = c - 'a' + 10;    } else if(c >= '0' && c <= '9') {        c -= '0';    } else {        c = 0xff;    }    return c;}//0~15转成字符，必须跟spi_bt_rfinfo_read在同个bankchar hex_to_char(u8 num)//字符转HEX{    if (num >= 10) {        return ('A' + num - 10);    } else {        return ('0' + num);    }}int my_strlen(const char *cpSrc){const char *cpTemp = cpSrc;while(*cpTemp++);return cpTemp-cpSrc-1;} /******************************************************************************** Function Name  : my_memset* Description    : write value to mem* Input          : *dst: destination pointer*                  val : value*                  cnt :length* Output         : None* Return         : None*******************************************************************************//**/void my_memset(void *dst, BYTE val, int cnt){BYTE *pDstTemp = (BYTE *)dst;while (cnt--){*pDstTemp++ = val;}}/******************************************************************************** Function Name  : zeromem* Description    : clear mem to 0* Input          : *dst: destination pointer*                  cnt :length* Output         : None* Return         : None*******************************************************************************/void zeromem(void *dst, int cnt){my_memset(dst, 0, cnt);}/******************************************************************************** Function Name  : my_memcpy* Description    : copy data from src to dst* Input          : *dst: destination pointer*                  *src: source pointer*                  cnt :length* Output         : None* Return         : None*******************************************************************************/void my_memcpy(void *dst, void *src, int cnt){BYTE *pDstTemp = (BYTE *)dst;BYTE *pSrcTemp = (BYTE *)src;while (cnt--){*pDstTemp++ = *pSrcTemp++;}}void u16memset(void *dst, BYTE val, int cnt){u16 *pdst = (u16*)dst;int cnt_temp = cnt/2;u16 u16val = (val<<8)|(val);while(cnt_temp--){*pdst++ = u16val;}if(cnt > ((cnt>>1)<<1)){u16val = *pdst;u16val &= 0xff00;u16val |= val;*pdst = u16val;}}void u16memcpy(void *dst, void *src, int cnt){u16 *pDstTemp = (u16 *)dst;u16 *pSrcTemp = (u16 *)src;int cnt_temp = cnt/2;while(cnt_temp--){*pDstTemp++ = *pSrcTemp++;}if(cnt > ((cnt>>1)<<1)){*pDstTemp &= 0xff00;*pDstTemp |= (*pSrcTemp & 0x00ff);}}/******************************************************************************** Function Name  : dma_memcpy* Description    : copy data from src to dst* Input          : *dst: destination pointer*                  *src: source pointer*                  cnt :length* Output         : None* Return         : None*******************************************************************************//* Compare memory to memory */int my_mem_cmp(const void* dst, const void* src, u8 cnt){    const char *d = (const char *)dst, *s = (const char *)src;    int r = 0;    while(cnt-- && (r = *d++ - *s++) == 0) ;    return r;}/******************************************************************************** Function Name  : bmemcmp* Description    : compare src and dst data same or different* Input          : *dst: destination pointer*                  *src: source pointer*                  cnt :length* Output         : None* Return         : 0:different; 1:same*******************************************************************************/BOOL bmemcmp(void *dst, void *src, u32 byte_len){    int i = 0;    u8 *dst_u8 = (u8*)dst;    u8 *src_u8 = (u8*)src;    for(i=0;i < byte_len;)    {       if(dst_u8[i] != src_u8[i])        {          return 0;       }          i++;         }    return 1;}/******************************************************************************** Function Name  : datacmp* Description    : u32 data compare* Input          : dst: destination data*                  src: source data* Output         : None* Return         : 0:same; 1:dst>src ; -1:dst<src*******************************************************************************/s8 datacmp(u32 dst, u32 src){s8 res = 0;if(dst > src)res = 1;else if(dst == src)res = 0;else if(dst < src)res = -1;return res;}/** * strcpy - Copy a %NUL terminated string * @dest: Where to copy the string to * @src: Where to copy the string from */char * _strcpy(char * dest, const char *src) {char *tmp = dest;while ((*dest++ = *src++) != '\0');return tmp;}/** * strncmp - Compare two length-limited strings * @cs: One string * @ct: Another string * @count: The maximum number of bytes to compare */int _strncmp(const char * cs, const char * ct, unsigned int count) {register signed char __res = 0;while (count) {if ((__res = *cs - *ct++) != 0 || !*cs++)break;count--;}return __res;}/******************************************************************************** Function Name  : XCHDWORD* Description    : exchange u32 data high_low byte* Input          : Before the exchange of data* Output         : None* Return         : After an exchange of data*******************************************************************************/u32 XCHDWORD(u32 dwXCHData){u32 dwXCHDataTmp;((BYTE *)(&dwXCHDataTmp))[0] = ((BYTE *)(&dwXCHData))[3];((BYTE *)(&dwXCHDataTmp))[1] = ((BYTE *)(&dwXCHData))[2];((BYTE *)(&dwXCHDataTmp))[2] = ((BYTE *)(&dwXCHData))[1];((BYTE *)(&dwXCHDataTmp))[3] = ((BYTE *)(&dwXCHData))[0];return dwXCHDataTmp;}/******************************************************************************** Function Name  : XCHWORD* Description    : exchange u32 data high_low byte* Input          : Before the exchange of data* Output         : None* Return         : After an exchange of data*******************************************************************************/u32 XCHWORD(u32 wXCHData){u32 wXCHDataTmp;((BYTE *)(&wXCHDataTmp))[0] = ((BYTE *)(&wXCHData))[1];((BYTE *)(&wXCHDataTmp))[1] = ((BYTE *)(&wXCHData))[0];return wXCHDataTmp;}