ASCII和各种进制之间的转换

#define TOLOWER(x) ((x) | 0x20) #define isxdigit(c) (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F'))#define isdigit(c) ('0' <= (c) && (c) <= '9') //bin2str(signret,out,strlen(signret),16); ASCII转换为16进制//last char of in must be 0x00void bin2str(unsigned char* in,char* out,int size,int base){unsigned char* pt1 = in;char* pt2 = out;do{pt2 += sprintf(pt2,"%02X",*pt1++);size--;}while(*pt1 && size);}//16进制转换为ASCIIvoid str2bin(char* in,unsigned char* out,int size,int base){unsigned char* pt1 = (unsigned char*)in;unsigned char* pt2 = out; while (isxdigit(*pt1) && size--){ *pt2++ = base * ( isdigit(*pt1) ? *pt1++-'0' : TOLOWER(*pt1++)-'a'+10) + ( isdigit(*pt1) ? *pt1++-'0' : TOLOWER(*pt1++)-'a'+10);} }

在某位老兄的帖子上看到的，觉得很有用，赶紧记下来。