是否有现有的gem或脚本将数字转换为comp-3 /压缩十进制格式？ [英] Is there an existing gem or script that converts numbers to comp-3/packed decimal format?

问题描述

继续我的冒险，将COBOL转换为Ruby程序，我必须将十进制数字转换为comp-3 /压缩十进制格式。任何人都知道这样做的简单Ruby脚本或gem吗？
Berns

Continuing with my adventure to convert COBOL to a Ruby program, I have to convert a decimal digit to a comp-3/packed decimal format. Anyone know of a simple Ruby script or gem that does this? Berns

推荐答案

Ruby知道如何打包半字节，所以事实证明这很容易：

Ruby knows how to pack nibbles, so it turns out to be quite easy:

def pack_comp(n)
  s = n.abs.to_s + (n < 0 ? "d" : "c")
  s = "0" + s if s.size.odd?
  [s].pack("H*")
end

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