/* Sysroff object format dumper.
   Copyright (C) 1994-2021 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */


/* Written by Steve Chamberlain <sac@cygnus.com>.

 This program reads a SYSROFF object file and prints it in an
 almost human readable form to stdout.  */

#include "sysdep.h"
#include "bfd.h"
#include "safe-ctype.h"
#include "libiberty.h"
#include "getopt.h"
#include "bucomm.h"
#include "sysroff.h"

static int dump = 1;
static int segmented_p;
static int code;
static int addrsize = 4;
static FILE *file;

static void derived_type (void);

static char *
getCHARS (unsigned char *ptr, int *idx, int size, int max)
{
  int oc = *idx / 8;
  char *r;
  int b = size;

  if (b >= max)
    return _("*undefined*");

  if (b == 0)
    {
      /* PR 17512: file: 13caced2.  */
      if (oc >= max)
	return _("*corrupt*");
      /* Got to work out the length of the string from self.  */
      b = ptr[oc++];
      (*idx) += 8;
    }

  *idx += b * 8;
  r = xcalloc (b + 1, 1);
  memcpy (r, ptr + oc, b);
  r[b] = 0;

  return r;
}

static void
dh (unsigned char *ptr, int size)
{
  int i;
  int j;
  int span = 16;

  printf ("\n************************************************************\n");

  for (i = 0; i < size; i += span)
    {
      for (j = 0; j < span; j++)
	{
	  if (j + i < size)
	    printf ("%02x ", ptr[i + j]);
	  else
	    printf ("   ");
	}

      for (j = 0; j < span && j + i < size; j++)
	{
	  int c = ptr[i + j];

	  if (c < 32 || c > 127)
	    c = '.';
	  printf ("%c", c);
	}

      printf ("\n");
    }
}

static int
fillup (unsigned char *ptr)
{
  int size;
  int sum;
  int i;

  size = getc (file);
  if (size == EOF
      || size <= 2)
    return 0;

  size -= 2;
  if (fread (ptr, size, 1, file) != 1)
    return 0;

  sum = code + size + 2;

  for (i = 0; i < size; i++)
    sum += ptr[i];

  if ((sum & 0xff) != 0xff)
    printf (_("SUM IS %x\n"), sum);

  if (dump)
    dh (ptr, size);

  return size;
}

static barray
getBARRAY (unsigned char *ptr, int *idx, int dsize ATTRIBUTE_UNUSED, int max)
{
  barray res;
  int i;
  int byte = *idx / 8;
  int size = 0;

  if (byte < max)
    size = ptr[byte++];

  res.len = size;
  res.data = (unsigned char *) xmalloc (size);

  for (i = 0; i < size; i++)
    res.data[i] = byte < max ? ptr[byte++] : 0;

  return res;
}

static int
getINT (unsigned char *ptr, int *idx, int size, int max)
{
  int n = 0;
  int byte = *idx / 8;

  if (byte >= max)
    {
      /* PR 17512: file: id:000001,src:000002,op:flip1,pos:45.  */
      /* Prevent infinite loops re-reading beyond the end of the buffer.  */
      fatal (_("ICE: getINT: Out of buffer space"));
      return 0;
    }

  if (size == -2)
    size = addrsize;

  if (size == -1)
    size = 0;

  switch (size)
    {
    case 0:
      return 0;
    case 1:
      n = (ptr[byte]);
      break;
    case 2:
      n = (ptr[byte + 0] << 8) + ptr[byte + 1];
      break;
    case 4:
      n = (((unsigned) ptr[byte + 0] << 24) + (ptr[byte + 1] << 16)
	   + (ptr[byte + 2] << 8) + (ptr[byte + 3]));
      break;
    default:
      fatal (_("Unsupported read size: %d"), size);
    }

  *idx += size * 8;
  return n;
}

static int
getBITS (unsigned char *ptr, int *idx, int size, int max)
{
  int byte = *idx / 8;
  int bit = *idx % 8;

  if (byte >= max)
    return 0;

  *idx += size;

  return (ptr[byte] >> (8 - bit - size)) & ((1 << size) - 1);
}

static void
itheader (char *name, int icode)
{
  printf ("\n%s 0x%02x\n", name, icode);
}

static int indent;

static void
p (void)
{
  int i;

  for (i = 0; i < indent; i++)
    printf ("| ");

  printf ("> ");
}

static void
tabout (void)
{
  p ();
}

static void
pbarray (barray *y)
{
  int x;

  printf ("%d (", y->len);

  for (x = 0; x < y->len; x++)
    printf ("(%02x %c)", y->data[x],
	    ISPRINT (y->data[x]) ? y->data[x] : '.');

  printf (")\n");
}

#define SYSROFF_PRINT
#define SYSROFF_SWAP_IN

#include "sysroff.c"

/* FIXME: sysinfo, which generates sysroff.[ch] from sysroff.info, can't
   hack the special case of the tr block, which has no contents.  So we
   implement our own functions for reading in and printing out the tr
   block.  */

#define IT_tr_CODE	0x7f

static void
sysroff_swap_tr_in (void)
{
  unsigned char raw[255];

  memset (raw, 0, 255);
  fillup (raw);
}

static void
sysroff_print_tr_out (void)
{
  itheader ("tr", IT_tr_CODE);
}

static int
getone (int type)
{
  int c = getc (file);

  code = c;

  if ((c & 0x7f) != type)
    {
      ungetc (c, file);
      return 0;
    }

  switch (c & 0x7f)
    {
    case IT_cs_CODE:
      {
	struct IT_cs dummy;
	sysroff_swap_cs_in (&dummy);
	sysroff_print_cs_out (&dummy);
      }
      break;

    case IT_dln_CODE:
      {
	struct IT_dln dummy;
	sysroff_swap_dln_in (&dummy);
	sysroff_print_dln_out (&dummy);
      }
      break;

    case IT_hd_CODE:
      {
	struct IT_hd dummy;
	sysroff_swap_hd_in (&dummy);
	addrsize = dummy.afl;
	sysroff_print_hd_out (&dummy);
      }
      break;

    case IT_dar_CODE:
      {
	struct IT_dar dummy;
	sysroff_swap_dar_in (&dummy);
	sysroff_print_dar_out (&dummy);
      }
      break;

    case IT_dsy_CODE:
      {
	struct IT_dsy dummy;
	sysroff_swap_dsy_in (&dummy);
	sysroff_print_dsy_out (&dummy);
      }
      break;

    case IT_dfp_CODE:
      {
	struct IT_dfp dummy;
	sysroff_swap_dfp_in (&dummy);
	sysroff_print_dfp_out (&dummy);
      }
      break;

    case IT_dso_CODE:
      {
	struct IT_dso dummy;
	sysroff_swap_dso_in (&dummy);
	sysroff_print_dso_out (&dummy);
      }
      break;

    case IT_dpt_CODE:
      {
	struct IT_dpt dummy;
	sysroff_swap_dpt_in (&dummy);
	sysroff_print_dpt_out (&dummy);
      }
      break;

    case IT_den_CODE:
      {
	struct IT_den dummy;
	sysroff_swap_den_in (&dummy);
	sysroff_print_den_out (&dummy);
      }
      break;

    case IT_dbt_CODE:
      {
	struct IT_dbt dummy;
	sysroff_swap_dbt_in (&dummy);
	sysroff_print_dbt_out (&dummy);
      }
      break;

    case IT_dty_CODE:
      {
	struct IT_dty dummy;
	sysroff_swap_dty_in (&dummy);
	sysroff_print_dty_out (&dummy);
      }
      break;

    case IT_un_CODE:
      {
	struct IT_un dummy;
	sysroff_swap_un_in (&dummy);
	sysroff_print_un_out (&dummy);
      }
      break;

    case IT_sc_CODE:
      {
	struct IT_sc dummy;
	sysroff_swap_sc_in (&dummy);
	sysroff_print_sc_out (&dummy);
      }
      break;

    case IT_er_CODE:
      {
	struct IT_er dummy;
	sysroff_swap_er_in (&dummy);
	sysroff_print_er_out (&dummy);
      }
      break;

    case IT_ed_CODE:
      {
	struct IT_ed dummy;
	sysroff_swap_ed_in (&dummy);
	sysroff_print_ed_out (&dummy);
      }
      break;

    case IT_sh_CODE:
      {
	struct IT_sh dummy;
	sysroff_swap_sh_in (&dummy);
	sysroff_print_sh_out (&dummy);
      }
      break;

    case IT_ob_CODE:
      {
	struct IT_ob dummy;
	sysroff_swap_ob_in (&dummy);
	sysroff_print_ob_out (&dummy);
      }
      break;

    case IT_rl_CODE:
      {
	struct IT_rl dummy;
	sysroff_swap_rl_in (&dummy);
	sysroff_print_rl_out (&dummy);
      }
      break;

    case IT_du_CODE:
      {
	struct IT_du dummy;
	sysroff_swap_du_in (&dummy);

	sysroff_print_du_out (&dummy);
      }
      break;

    case IT_dus_CODE:
      {
	struct IT_dus dummy;
	sysroff_swap_dus_in (&dummy);
	sysroff_print_dus_out (&dummy);
      }
      break;

    case IT_dul_CODE:
      {
	struct IT_dul dummy;
	sysroff_swap_dul_in (&dummy);
	sysroff_print_dul_out (&dummy);
      }
      break;

    case IT_dss_CODE:
      {
	struct IT_dss dummy;
	sysroff_swap_dss_in (&dummy);
	sysroff_print_dss_out (&dummy);
      }
      break;

    case IT_hs_CODE:
      {
	struct IT_hs dummy;
	sysroff_swap_hs_in (&dummy);
	sysroff_print_hs_out (&dummy);
      }
      break;

    case IT_dps_CODE:
      {
	struct IT_dps dummy;
	sysroff_swap_dps_in (&dummy);
	sysroff_print_dps_out (&dummy);
      }
      break;

    case IT_tr_CODE:
      sysroff_swap_tr_in ();
      sysroff_print_tr_out ();
      break;

    case IT_dds_CODE:
      {
	struct IT_dds dummy;

	sysroff_swap_dds_in (&dummy);
	sysroff_print_dds_out (&dummy);
      }
      break;

    default:
      printf (_("GOT A %x\n"), c);
      return 0;
      break;
    }

  return 1;
}

static int
opt (int x)
{
  return getone (x);
}

static void
must (int x)
{
  if (!getone (x))
    printf (_("WANTED %x!!\n"), x);
}

static void
tab (int i, char *s)
{
  indent += i;

  if (s)
    {
      p ();
      puts (s);
    }
}

static void
dump_symbol_info (void)
{
  tab (1, _("SYMBOL INFO"));

  while (opt (IT_dsy_CODE))
    {
      if (opt (IT_dty_CODE))
	{
	  must (IT_dbt_CODE);
	  derived_type ();
	  must (IT_dty_CODE);
	}
    }

  tab (-1, "");
}

static void
derived_type (void)
{
  tab (1, _("DERIVED TYPE"));

  while (1)
    {
      if (opt (IT_dpp_CODE))
	{
	  dump_symbol_info ();
	  must (IT_dpp_CODE);
	}
      else if (opt (IT_dfp_CODE))
	{
	  dump_symbol_info ();
	  must (IT_dfp_CODE);
	}
      else if (opt (IT_den_CODE))
	{
	  dump_symbol_info ();
	  must (IT_den_CODE);
	}
      else if (opt (IT_den_CODE))
	{
	  dump_symbol_info ();
	  must (IT_den_CODE);
	}
      else if (opt (IT_dds_CODE))
	{
	  dump_symbol_info ();
	  must (IT_dds_CODE);
	}
      else if (opt (IT_dar_CODE))
	{
	}
      else if (opt (IT_dpt_CODE))
	{
	}
      else if (opt (IT_dul_CODE))
	{
	}
      else if (opt (IT_dse_CODE))
	{
	}
      else if (opt (IT_dot_CODE))
	{
	}
      else
	break;
    }

  tab (-1, "");
}

static void
module (void)
{
  int c = 0;
  int l = 0;

  tab (1, _("MODULE***\n"));

  do
    {
      c = getc (file);
      if (c == EOF)
	break;
      ungetc (c, file);

      c &= 0x7f;
    }
  while (getone (c) && c != IT_tr_CODE);

  tab (-1, "");

  c = getc (file);
  while (c != EOF)
    {
      printf ("%02x ", c);
      l++;
      if (l == 32)
	{
	  printf ("\n");
	  l = 0;
	}
      c = getc (file);
    }
}

ATTRIBUTE_NORETURN static void
show_usage (FILE *ffile, int status)
{
  fprintf (ffile, _("Usage: %s [option(s)] in-file\n"), program_name);
  fprintf (ffile, _("Print a human readable interpretation of a SYSROFF object file\n"));
  fprintf (ffile, _(" The options are:\n\
  -h --help        Display this information\n\
  -v --version     Print the program's version number\n"));

  if (REPORT_BUGS_TO[0] && status == 0)
    fprintf (ffile, _("Report bugs to %s\n"), REPORT_BUGS_TO);
  exit (status);
}

int
main (int ac, char **av)
{
  char *input_file = NULL;
  int option;
  static struct option long_options[] =
  {
    {"help", no_argument, 0, 'h'},
    {"version", no_argument, 0, 'V'},
    {NULL, no_argument, 0, 0}
  };

#ifdef HAVE_LC_MESSAGES
  setlocale (LC_MESSAGES, "");
#endif
  setlocale (LC_CTYPE, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  program_name = av[0];
  xmalloc_set_program_name (program_name);
  bfd_set_error_program_name (program_name);

  expandargv (&ac, &av);

  while ((option = getopt_long (ac, av, "HhVv", long_options, (int *) NULL)) != EOF)
    {
      switch (option)
	{
	case 'H':
	case 'h':
	  show_usage (stdout, 0);
	  /*NOTREACHED*/
	case 'v':
	case 'V':
	  print_version ("sysdump");
	  exit (0);
	  /*NOTREACHED*/
	case 0:
	  break;
	default:
	  show_usage (stderr, 1);
	  /*NOTREACHED*/
	}
    }

  /* The input and output files may be named on the command line.  */

  if (optind < ac)
    input_file = av[optind];

  if (!input_file)
    fatal (_("no input file specified"));

  file = fopen (input_file, FOPEN_RB);

  if (!file)
    fatal (_("cannot open input file %s"), input_file);

  module ();
  return 0;
}