#include <stdio.h>
#define DUMPSIZE 16
main(int argc, char **argv){
int i;
char *n;
FILE *f;
  if (1==argc) {
    dump(0,stdin);
  } else for (i=1;i<argc;i++) {
    n=argv[i];
    if (0==strcmp("-",n)) {
      dump("(stdin)",stdin);
    } else if ( f = fopen(n,"r") ) {
      dump(n,f);
      fclose(f);
    } else {
      fprintf(stderr,"%s: cannot read %s\n",argv[0],n);
      exit(2);
    }
  }
}
dump(char *h, FILE *f){
  int m=0,n,i;
  char *p,b[DUMPSIZE+1];
  if (h) printf("%s:\n",h);
  while ( 0 != (i=n=fread(p=b,1,DUMPSIZE,f)) ) {
    printf("%3d: ",m);
    m+=DUMPSIZE;
    while (i--) {
      int c = 0xFF & *p++;
      if (!(isascii(c)&&isprint(c))) *(p-1)='.';
      printf("%02X ",c);
    }
    *p = '\0';
    i=1+3*(DUMPSIZE-n);
    while(i--) putchar(' ');
    puts(b);
    if (DUMPSIZE!=n) return;
  }
}