From:	"Andrew Davidson" <andrew AT lemure DOT freeserve DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	How do I set up predefined structures?
Date:	Tue, 10 Aug 1999 03:03:30 +0100
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I'm trying to set up a set of predefined structures for a C based emulator
I'm writing using GCC and Allegro. It's intended to allow easy definitions
of ROM loading information and the overall description of each of the ROM
sub-sets (there are 3 sub-sets in every game: program, tile, and sprite) is
NULL terminated because it can vary in length:

These make up the basic structures:

typedef struct rom_double {
    char *file1,*file2;
    int length;
}

typedef struct rom_triple {
    char *file1,*file2,*file3;
    int length;
};

struct rom_map {
    rom_double *program_roms;
    rom_triple *tile_roms;
    rom_double *sprite_roms;
};

As an example of a simple predefined structure:

struct rom_map game1_map = {
    {    /* program roms */
        {"progrom1a","progrom1b",65536},
        {"progrom2a","progrom2b",65536},
        {NULL, NULL, 0}
    },

    {    /* tile roms */
        {"tilerom1a","tilerom1b","tilerom1c",65536},
        {NULL, NULL, NULL, 0}
    },

    {    /* sprite roms */
        {"spriterom1a","spriterom1b",65536},
        {"spriterom2a","spriterom2b",65536},
        {"spriterom3a","spriterom3b",65536},
        {"spriterom4a","spriterom4b",65536},
        {NULL, NULL, 0}
    }
};


However, when I compile it tons of warnings are generated, so I'm obviously
doing something hideously wrong, but I can't see what.

Thanks for any help,

Andrew

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