/* demacbin.c   by Michael Thorpe   2001-01-15 */

#include <stdio.h>

#define BUF_SIZE 4096

unsigned char buf[BUF_SIZE];

int main(void) {
   size_t i;
   FILE *f;
   unsigned long datalen;

   i=fread(buf,128,1,stdin);
   if(i != 1 || buf[1]>63) {
      fprintf(stderr,"Couldn't read header\n");
      return(-1);
   }
   buf[2+buf[1]]='\0';
   f=fopen(buf+2,"wb");
   if(!f) {
      fprintf(stderr,"Couldn't open output file\n");
      return(-1);
   }
   datalen=(buf[83]<<24)+(buf[84]<<16)+(buf[85]<<8)+buf[86];
   printf("datalen=%lx\n",datalen);
   while(datalen) {
      i=fread(buf,1,BUF_SIZE,stdin);
      if(i<0) {
         fprintf(stderr,"Couldn't read input file\n");
         return(-1);
      }
      if(1 != fwrite(buf,i,1,f)) {
         fprintf(stderr,"Couldn't write output file\n");
         return(-1);
      }
      datalen-=i;
   }
   return(0);
}