如何在Delphi7中定义一个无符号的64位整数？ [英] How to define an unsigned 64-bit integer in Delphi7?

问题描述

在Delphi 7中，int64s被签名，如果我尝试声明一个大于$ 8000000000000000的十六进制常量（例如，真正的一个uint64），我得到一个错误。你可以建议一些解决方法吗？

解决方案

你可以这样制作一个变体记录

  type muint64 = record 
 case boolean of 
 true：（i64：int64）; 
 false：（lo32，hi32：cardinal）; 
结束
  

现在，您可以使用红雀以无符号数据填充您的uint64。

另一个选项是使用这样的代码：

  const almostmaxint64 = $ 800000045000000; 
 var muint64：int64; 
 begin 
 muint64：= almostmaxint64; 
 muint64：= muint64 shl 1; 
 end 
  

In Delphi 7, int64s are signed, if I try to declare a hex constant larger than $8000000000000000 (eg, what is really an uint64) I get an error. Can you advise some workarounds, please?

解决方案

You can make a variant record like so

type muint64 = record
  case boolean of
    true: (i64 : int64);
    false:(lo32, hi32: cardinal);
end;

Now you can just use the cardinals to fill your uint64 with unsigned data.

The other option would be to use code like this:

const almostmaxint64 = $800000045000000; 
var muint64: int64;    
begin
   muint64:= almostmaxint64;
   muint64:= muint64 shl 1;
end

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