example.cpp

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#include <stdio.h>
#include "../comprlib.h"       /* Link with: comprlib.o */
#include "../io/fileio.h"
};                          /* What is that doing there? ;} */

int main(int argc, char* argv[])
{
    int i;
    
    if (argc != 5)
    {
        printf("Usage: %s method e/d input output\n", argv[0]);
        printf("Methods: ");
        for (i = 0; methods[i].name; ++i)
        {
            printf("%s ", methods[i].name);
        }
        return 0;
    }

    FILE* in = fopen(argv[3], "rb");
    FILE* out = fopen(argv[4], "wb");
    int (*encode)() = 0;
    int (*decode)() = 0;

    if (!in || !out) { printf("cannot open files"); return -1; }
    FileIO::FileIO(in, out);

    end_of_data = FileIO::end_of_data;
    read_byte = FileIO::read_byte;
    write_byte = FileIO::write_byte;
    stream_size = FileIO::stream_size;
    beginning_of_data = FileIO::beginning_of_data;
    write_array = FileIO::write_array;
    write_block = FileIO::write_block;

    for (i = 0; methods[i].name; ++i)
    {
        if (!stricmp(methods[i].name, argv[1]))
        {
            encode = methods[i].encode;
            decode = methods[i].decode;
            break;
        }
    }

    if (!encode || !decode) {
        printf("No valid method selected, choose one of: ");
        for (i = 0; methods[i].name; ++i)
        {
            printf("%s ", methods[i].name);
        }
        return -2;
    }


    if (argv[2][0] & 1)     /* e(ncode) or another odd letter */
        encode();
    else                    /* d(ecode) or another even letter */
        decode();           
    
    fclose(in);
    fclose(out);
}