Dump buffer in hex and dec mode as vi hex mode

gistfile1.txt

void buffer_dump(char *data, int length) {
    int row, col, idx = 0;
    for (row = 0; row <= length / 16; row++) {
        int len = row == length / 16 ? length % 16 : 16;
        printf("%d: ", row);
        //print hex
        for (col = 0; col < len; col++) {
            printf("%02X ", (unsigned char) data[idx + col]);
        }
        for (; col < 16; col++)
            printf("   ");
        
        //print split string
        printf("          ");
        //print dec
        for (col = 0; col < len; col++) {
            printf("%c", (data[idx + col] >= ' ' && data[idx + col] <= '~') ? data[idx + col] : '.');
        }
        printf("\n");
        idx += 16;
    }
}