在将红宝石中的数据从十六进制转换为整数时,我们遇到了一些小问题。
我们得到一个硬件信号,它是整数数据->转换为高字节和低字节,按位取反->字符串。
这是一个例子:
Something between 0 and 75 => will be converted to "0x3938"...
但是,如何将“ 0x3938”转换回75?
我已经尝试过:
"0x3938".to_i(16) => 14648 # wrong results (also with "0x3938".hex)
但这会返回错误的值。
有什么提示吗?我没有得到这个高/低字节分割吗?
编辑:这是一些示例值,所有这些值都应导致0到75之间的整数。计算是使用joelparkerhenderson的答案完成的。
Hex: 0x0000 - calculated integer: 0.0
Hex: 0x0000 - calculated integer: 0.0
Hex: 0x0000 - calculated integer: 0.0
Hex: 0x025d - calculated integer: 186.0
Hex: 0x0ad3 - calculated integer: 203.0
Hex: 0x0fe1 - calculated integer: 135.0
Hex: 0x1508 - calculated integer: 16.0
Hex: 0x1a8a - calculated integer: 81.0
Hex: 0x1f6e - calculated integer: 118.0
Hex: 0x244f - calculated integer: 242.0
Hex: 0x28b2 - calculated integer: 77.0
Hex: 0x2a0a - calculated integer: 80.0
Hex: 0x2aa8 - calculated integer: 21.0
Hex: 0x2ae6 - calculated integer: 103.0
Hex: 0x2add - calculated integer: 187.0
Hex: 0x2adc - calculated integer: 59.0
Hex: 0x2aea - calculated integer: 87.0
Hex: 0x2abf - calculated integer: 253.0
Hex: 0x2a87 - calculated integer: 225.0
Hex: 0x2a4a - calculated integer: 82.0
Hex: 0x2a56 - calculated integer: 106.0
Hex: 0x2a91 - calculated integer: 137.0
Hex: 0x2aee - calculated integer: 119.0
Hex: 0x2b64 - calculated integer: 38.0
Hex: 0x2f41 - calculated integer: 130.0
Hex: 0x32dc - calculated integer: 59.0
Hex: 0x341d - calculated integer: 184.0
Hex: 0x34e7 - calculated integer: 231.0
Hex: 0x35af - calculated integer: 245.0
Hex: 0x369f - calculated integer: 249.0
Hex: 0x377e - calculated integer: 126.0
Hex: 0x3873 - calculated integer: 206.0
Hex: 0x3959 - calculated integer: 154.0
Hex: 0x3a33 - calculated integer: 204.0
Hex: 0x3b4f - calculated integer: 242.0
Hex: 0x3c1b - calculated integer: 216.0
这可以为您提供帮助:
def rbit(n)
r = 0
8.times{|i| r = r * 2 + n[i] }
r
end
或者,如果您更喜欢位运算符,则如下所示:
def rbit(n)
(((n & 0x01) << 7)
|((n & 0x02) << 5)
|((n & 0x04) << 3)
|((n & 0x08) << 1)
|((n & 0x10) >> 1)
|((n & 0x20) >> 3)
|((n & 0x40) >> 5)
|((n & 0x80) >> 7))
n
end
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句