see_binary函数

#include

/*
 * 查看从地址addr开始的bytes字节的二进制状态。
 */
int
see_binary(char * addr, int bytes)
{
        unsigned char mask = 1;
        int i, j;
        int newline = 0;

        for (i = 0; i < bytes; ++i) {
                newline = !(i%4);
                newline && printf("\n%p: ", &addr[i]);

                for (j = 7; j >= 0; --j) {
                        printf("%d ", ((mask << j) & addr[i]) ? 1 : 0);
                }
                putchar(' ');
        }
        putchar('\n');

        return 0;
}

/*
 * 带高亮显示的版本，，
 */
int
see_binary(char * addr, int bytes)
{
        unsigned char mask = 1;
        int i, j;
        int newline = 0;
        char *CL_NULL = "\033[0m";
        char *CL_BLUE = "\033[34m";
        char *CL_HBLUE = "\033[1;34m";

        for (i = 0; i < bytes; ++i) {
                newline = !(i%4);
                newline && printf("\n%p: ", &addr[i]);

printf(CL_HBLUE);
                for (j = 7; j >= 0; --j) {
                        printf("%d ", ((mask << j) & addr[i]) ? 1 : 0);
                }
printf(CL_NULL);
                putchar(' ');
        }
        putchar('\n');

        return 0;
}