Stefan Röttger

/* write a raw file */
void writefile(const char *filename,unsigned char *data,unsigned int bytes)
{
   FILE *file;

   if (bytes<1)
      ERRORMSG();

   if ((file=fopen(filename,"wb"))==NULL)
      IOERROR();

   if (fwrite(data,1,bytes,file)!=bytes)
      IOERROR();

   fclose(file);
}

/* read a raw file */
unsigned char *readfile(const char *filename,unsigned int *bytes)
{
   const unsigned int BLOCKSIZE=1<<20;

   FILE *file;

   unsigned char *data;
   unsigned int cnt,blkcnt;

   if ((file=fopen(filename,"rb"))==NULL)
      return(NULL);

   data=NULL;
   cnt=0;

   do
   {
      if (data==NULL)
      {
         if ((data=(unsigned char *)malloc(BLOCKSIZE))==NULL)
            MEMERROR();
      }
      else
      {
         if ((data=(unsigned char *)realloc(data,cnt+BLOCKSIZE))==NULL)
            MEMERROR();
      }

      blkcnt=fread(&data[cnt],1,BLOCKSIZE,file);
      cnt+=blkcnt;
   } while (blkcnt==BLOCKSIZE);

   if (cnt==0)
   {
      free(data);
      return(NULL);
   }

   if ((data=(unsigned char *)realloc(data,cnt))==NULL)
      MEMERROR();

   fclose(file);

   *bytes=cnt;

   return(data);
   }