C常用基础函数集合

/***  字符处理  ***/

#define MAKEWORD(a, b)      ((WORD)(((BYTE)(((DWORD_PTR)(a)) & 0xff)) | ((WORD)((BYTE)(((DWORD_PTR)(b)) & 0xff))) << 8))#define MAKELONG(a, b)      ((LONG)(((WORD)(((DWORD_PTR)(a)) & 0xffff)) | ((DWORD)((WORD)(((DWORD_PTR)(b)) & 0xffff))) << 16))#define LOWORD(l)           ((WORD)(((DWORD_PTR)(l)) & 0xffff))#define HIWORD(l)           ((WORD)((((DWORD_PTR)(l)) >> 16) & 0xffff))#define LOBYTE(w)           ((BYTE)(((DWORD_PTR)(w)) & 0xff))#define HIBYTE(w)           ((BYTE)((((DWORD_PTR)(w)) >> 8) & 0xff))

字符提取，复制函数

// Copy一个WORD// 指针变量按照大端字节：高位字节在低位字节的前面,也就是高位在内存地址低的一端void CopyWord(void * pDest, const u16 value){*((BYTE *)pDest) = HIBYTE(value);*(((BYTE *)pDest) + 1) = LOBYTE(value);}// Copy一个DWORD// 指针变量按照大端字节：高位字节在低位字节的前面,也就是高位在内存地址低的一端void CopyDword(void * pDest, const u32 value){*((BYTE *)pDest) = HIBYTE(HIWORD(value));*(((BYTE *)pDest) + 1) = LOBYTE(HIWORD(value));*(((BYTE *)pDest) + 2) = HIBYTE(LOWORD(value));*(((BYTE *)pDest) + 3) = LOBYTE(LOWORD(value));}

数制转换

// 十进制数转换为BCD数0X09->0X090X0B->0X11BYTE ByteToBcd(BYTE num){return (num / 10) * 16 + (num % 10);}// BCD数转换为十进制数字节0X12->0X0CBYTE BcdToByte(BYTE uBcd){return (uBcd / 16) * 10 + (uBcd % 16);}

eg:

// 输入信号ymemset(msgReport->sign, 0, sizeof(msgReport->sign));{u32 inSignal = Frm_GetSignalGroup();msgReport->sign[0] = LOBYTEL(inSignal);msgReport->sign[1] = HIBYTEL(inSignal);}