xex_tool.c

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

//  make bin\mini.xex with mini.raw at $400 and spritedata at $10000 ( bank 1 )
//  xex -o bin\mini.xex -a 400 bin\mini.raw -a 10000 resources\prince.spr
//  -o output.xex 
//  -a address ( in hex ) filename 

void fputw(uint16_t word, FILE *file)
{
    fputc(word & 0xFF, file);
    fputc(word >> 8, file);
}

void fput_header(uint16_t offset, uint16_t size, FILE *file)
{
    fputw(offset, file);            // from
    fputw(offset + size - 1, file); // to
}

void main(int argc,char *argv[])
{
uint32_t address=0;
FILE *fout = NULL;

    for (int q=1;q<argc;q++)
    {
        if (argv[q][0]=='-')
        {
            switch(argv[q][1])
            {
                case 'a':
                {
                    address = strtoul(argv[q+1],NULL,16);
                    q+=1;
                    break;
                }
                case 'o':
                {
                    fout = fopen(argv[q+1],"wb");
                    fputw(0xffff,fout);
                    q+=1;
                    break;
                }
                default:
                {
                }
            }
        }
        else 
        {
            if (fout==NULL)
            {
                printf("Err: no outputfile specified\n");
                return;
            }
            printf("file %s\t",argv[q]);
            //  read the file into a buffer
            char *data;
            int length;
            FILE *fin = fopen(argv[q],"rb");
            fseek(fin,0,SEEK_END);
            length = ftell(fin);
            fseek(fin,0,SEEK_SET);
            data = calloc(length+1,1);
            fread(data,1,length,fin);
            fclose(fin);

            //  output bank info
            uint8_t bank = address>>16;
            printf("addr $%04X bank $%02X length $%x\n",address&0xffff,bank,length);
            //  output current bank
            fput_header(0xfffe,1,fout);
            fputc(bank,fout);
            //  output destination address
            fput_header(address&0xffff,length,fout);
            //  output data itself
            fwrite(data,1,length,fout);
            //  free this data block 
            free(data);
            //  we normally override address, this moves address to the end of last loaded file
            address += length;
        }
    }

    if (fout!=NULL)
        fclose(fout);
}