23、Awk函数使用与技巧详解

Awk函数使用与技巧详解

1. 位操作与字符串转换

在Awk中，位操作和字符串转换是常见的操作。下面是一段代码示例，展示了如何将二进制数转换为字符串，并进行位运算：

while ((length(data) % 8) != 0)
    data = "0" data
return data
}
BEGIN {
    printf "123 = %s\n", bits2str(123)
    printf "0123 = %s\n", bits2str(0123)
    printf "0x99 = %s\n", bits2str(0x99)
    comp = compl(0x99)
    printf "compl(0x99) = %#x = %s\n", comp, bits2str(comp)
    shift = lshift(0x99, 2)
    printf "lshift(0x99, 2) = %#x = %s\n", shift, bits2str(shift)
    shift = rshift(0x99, 2)
    printf "rshift(0x99, 2) = %#x = %s\n", shift, bits2str(shift)
}

运行该程序会得到如下输出：

$ gawk -f testbits.awk
123 = 01111011
0123 = 01010011
0x99 = 10011001
compl(0x99) = 0xffffff66 = 11111111111111111111111101100110
lsh