如何定义“UCHAR * POINTER_32"和“VOID * POINTER_32"Delphi 中的类型? [英] How to define "UCHAR * POINTER_32" and "VOID * POINTER_32" types in Delphi?

问题描述

翻译IP_OPTION_INFORMATION32 和 ICMP_ECHO_REPLY32 用于 64 位编译器的结构我被困在那里使用的数据类型.参考文献中的结构定义:

Translating the IP_OPTION_INFORMATION32 and ICMP_ECHO_REPLY32 structures for 64-bit compiler I got stucked with data types to use there. Structure definitions from the reference:

IP_OPTION_INFORMATION32 结构:

typedef struct _IP_OPTION_INFORMATION32 {
  UCHAR              Ttl;
  UCHAR              Tos;
  UCHAR              Flags;
  UCHAR              OptionsSize;
  UCHAR * POINTER_32 OptionsData;
} IP_OPTION_INFORMATION32, *PIP_OPTION_INFORMATION32;

我会这样翻译(对于 Delphi XE2，64 位目标平台).如您所见，我不知道该结构的 OptionsData 字段使用什么类型:

I would translate this way (for Delphi XE2, 64-bit target platform). As you can see, I don't know what type to use for the OptionsData field of the structure:

IP_OPTION_INFORMATION32 = record
  Ttl: UCHAR;
  Tos: UCHAR;
  Flags: UCHAR;
  OptionsSize: UCHAR;
  OptionsData:       // what should I use here for UCHAR * POINTER_32 ?
end;

ICMP_ECHO_REPLY32 结构:

typedef struct icmp_echo_reply32 {
  IPAddr                         Address;
  ULONG                          Status;
  ULONG                          RoundTripTime;
  USHORT                         DataSize;
  USHORT                         Reserved;
  VOID * POINTER_32              Data;
  struct ip_option_information32  Options;
} ICMP_ECHO_REPLY32, *PICMP_ECHO_REPLY32;

对于 Delphi XE2 64 位目标平台，我会写:

For Delphi XE2 64-bit target platform I would write:

ICMP_ECHO_REPLY32 = record
  Address: TIPAddr;  // defined before
  Status: ULONG;
  RoundTripTime: ULONG;
  DataSize: USHORT;
  Reserved: USHORT;
  Data:              // what should I use here for VOID * POINTER_32 ?
  Options: IP_OPTION_INFORMATION32;
end;

问题:

您将如何在 Delphi 中为 64 位平台目标定义 UCHAR * POINTER_32 和 VOID * POINTER_32 类型?据我所知，没有可用于 64 位平台目标的 32 位指针类型，我只是不喜欢定义它，例如作为 Int32 类型:-)

Question:

How would you define the UCHAR * POINTER_32 and VOID * POINTER_32 types in Delphi for 64-bit platform target ? As far as I know, there is no 32-bit pointer type available for 64-bit platform target and I just don't like it to be defined e.g. as a Int32 type :-)

上述类型最准确的翻译是什么?

What is the most precise translation for the mentioned types ?

推荐答案

POINTER_32 在另一个 Stack Overflow 问题中涵盖的问题:POINTER_32 - 它是什么，为什么?

The issue of what POINTER_32 is covered in another Stack Overflow question: POINTER_32 - what is it, and why?

在与在不同进程中定义的结构(具有 32 位指针)执行互操作时，您会使用它.

You would use it when performing interop with structs that are defined in a different process, one that has 32 bit pointers.

您在 Delphi 中没有 __ptr32 等价物，因此您别无选择，只能将其声明为 32 位整数.我会使用无符号类型.

You don't have the equivalent of __ptr32 in Delphi so you have simply no choice other than to declare it as a 32 bit integer. I would use an unsigned type.

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