字符串转位序

#include 
#include 
#include 
#include 

#define ROW_UNIT	512
#define UNIT_LENGTH	500

int charindex[8] = {
                     0x80, 0x40, 0x20, 0x10,
                     0x08, 0x04, 0x02, 0x01
                   };

static inline int strtobit(void *bit, char *str)
{
	int pos = 0;
	char *bits = bit;
	memset(bits, 0, ROW_UNIT >> 3);
	while(('0' == *str) || ('1' == *str)) {
		if('1' == *str) {
			bits[pos>>3] |= charindex[pos&0x7];
		}
		++str;
		++pos;
	}
	return 0;
}