How to implement an enum with 2 possible values

Templates/Scripts
1

I’m trying to consolidate a couple of enums that are technically the same type, but have different values depending on the version of the file.

enum <ushort> CHUNKTYPE { 
        Any = 0x0,
        Mesh = 0x1000,
        Helper = 0x1001,
        ...
};

enum <uint> CHUNKTYPE {
        Any = 0x0,
        Mesh = 0xCCCC0000,
        Helper = 0xCCCC0001,
        ...
};

I’m running into namespace issues where I can’t have the same const values in a file. And the size difference between the enums (one is ushort, other is uint) also causes problems.

I’d like to be able to use the enum as a type, but have the correct version load up dependent on the file version from the header. Any thoughts on how to approach this?

2

Assuming that both styles of CHUNKTYPE could be in the same file, you would have to add either a prefix or postfix to the names so there won’t be a name collision. For example:

enum <ushort> CHUNKTYPE_US { 
        us_Any = 0x0,
        us_Mesh = 0x1000,
        us_Helper = 0x1001,
        ...
};
enum <uint> CHUNKTYPE_IS { 
        is_Any = 0x0,
        is_Mesh = 0x1000,
        is_Helper = 0x1001,
        ...
};

Then in your code you could use an if statement to check which one to use:

if( header.useUshortChunks )
     CHUNKTYPE_US chunk;
else
     CHUNKTYPE_UI chunk;

You could also put this code in a function if it is used a lot.

Graeme
SweetScape Software

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