FUNCTIONS

1. main
2. hd

   1 /* 
   2  * hd.c - a hexadecimal dump 
   3  * by Hirotsugu Kakugawa
   4  *
   5  */
   6 /*
   7  * Copyright (C) 1996 Hirotsugu Kakugawa. 
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  * 
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  * 
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
  23  */
  24 
  25 
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 
  29 #define SEPARETER  "  "
  30 int hd(FILE*);
  31 
  32 
  33 int
  34 main(argc, argv)
     /* [<][>][^][v][top][bottom][index][help] */
  35      int argc;
  36      char **argv;
  37 {
  38   if (argc > 1){
  39     if (strncmp(argv[1], "-h", 2) == 0){
  40       printf("hd --- hex dump\n");
  41       printf("Usage: hd [file ... ]\n");
  42       exit(0);
  43     }
hd(fopen(argv[1], "rb"));
  45   } else 
hd(stdin);
  47 
  48   return 0;
  49 }
  50  
  51 int hd(FILE *fp)
     /* [<][>][^][v][top][bottom][index][help] */
  52 {
  53   int  c, addr, oaddr, i;
  54   char cstr[17];
  55 
  56   if (fp == NULL)
  57     exit(1);
  58 
  59   addr = 0;
  60   while ((c = getc(fp)) >= 0){
  61     if (addr % 256 == 0)
  62       printf("          +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F\n");
  63     if (addr % 16 == 0)
  64       printf("%08x: ", addr);
  65 
  66     printf("%02x ", c);
  67     cstr[addr%16] = ((c <= 0x1f)||(0x7f <= c)) ? '.': (char)c;
  68 
  69     addr++;
  70     if (addr % 16 == 0){
  71       printf("%s", SEPARETER);
  72       for (i = 0; i < 16; i++)
  73         printf("%c", cstr[i]);
  74       putchar('\n');
  75     }
  76     if (addr % 256 == 0)
  77       putchar('\n');
  78   }
  79 
  80   addr = addr % 16;
  81   if (addr != 0){
  82     for (oaddr = addr; addr < 16; addr++)
  83       printf("%s", "   ");
  84     printf("%s", SEPARETER);
  85     for (i = 0; i < oaddr; i++)
  86       printf("%c", cstr[i]);
  87     putchar('\n');
  88   }
  89 
  90   return 0;
  91 }
  92 
  93 /*EOF*/