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/* Demangler test program,

   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.

   Written by Zack Weinberg <zack@codesourcery.com

   This file is part of GNU libiberty.

   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 2 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.

*/

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "ansidecl.h"

#include <stdio.h>

#include "libiberty.h"

#include "demangle.h"

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#if HAVE_STDLIB_H

# include <stdlib.h>

#endif

struct line

{

  size_t alloced;

  char *data;

};

static unsigned int lineno;

/* Safely read a single line of arbitrary length from standard input.  */

#define LINELEN 80

static void

getline(buf)

     struct line *buf;

{

  char *data = buf->data;

  size_t alloc = buf->alloced;

  size_t count = 0;

  int c;

  if (data == 0)

    {

      data = xmalloc (LINELEN);

      alloc = LINELEN;

    }

  /* Skip comment lines.  */

  while ((c = getchar()) == '#')

    {

      while ((c = getchar()) != EOF && c != '\n');

      lineno++;

    }

  /* c is the first character on the line, and it's not a comment

     line: copy this line into the buffer and return.  */

  while (c != EOF && c != '\n')

    {

      if (count + 1 >= alloc)

        {

          alloc *= 2;

          data = xrealloc (data, alloc);

        }

      data[count++] = c;

      c = getchar();

    }

  lineno++;

  data[count] = '\0';

  buf->data = data;

  buf->alloced = alloc;

}

/* If we have mmap() and mprotect(), copy the string S just before a

   protected page, so that if the demangler runs over the end of the

   string we'll get a fault, and return the address of the new string.

   If no mmap, or it fails, or it looks too hard, just return S.  */

#ifdef HAVE_SYS_MMAN_H

#include <sys/mman.h>

#endif

#if defined(MAP_ANON) && ! defined (MAP_ANONYMOUS)

#define MAP_ANONYMOUS MAP_ANON

#endif

static const char *

protect_end (const char * s)

{

#if defined(HAVE_MMAP) && defined (MAP_ANONYMOUS)

  size_t pagesize = getpagesize();

  static char * buf;

  size_t s_len = strlen (s);

  char * result;

  /* Don't try if S is too long.  */

  if (s_len >= pagesize)

    return s;

  /* Allocate one page of allocated space followed by an unmapped

     page.  */

  if (buf == NULL)

    {

      buf = mmap (NULL, pagesize * 2, PROT_READ | PROT_WRITE,

                  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

      if (! buf)

        return s;

      munmap (buf + pagesize, pagesize);

    }

  result = buf + (pagesize - s_len - 1);

  memcpy (result, s, s_len + 1);

  return result;

#else

  return s;

#endif

}

static void

fail (lineno, opts, in, out, exp)

     int lineno;

     const char *opts;

     const char *in;

     const char *out;

     const char *exp;

{

  printf ("\

FAIL at line %d, options %s:\n\

in:  %s\n\

out: %s\n\

exp: %s\n",

          lineno, opts, in, out != NULL ? out : "(null)", exp);

}

/* The tester operates on a data file consisting of groups of lines:

   options

   input to be demangled

   expected output

   Supported options:

     --format=<name>     Sets the demangling style.

     --no-params         There are two lines of expected output; the first

                         is with DMGL_PARAMS, the second is without it.

     --is-v3-ctor        Calls is_gnu_v3_mangled_ctor on input; expected

                         output is an integer representing ctor_kind.

     --is-v3-dtor        Likewise, but for dtors.

     --ret-postfix       Passes the DMGL_RET_POSTFIX option

   For compatibility, just in case it matters, the options line may be

   empty, to mean --format=auto.  If it doesn't start with --, then it

   may contain only a format name.

*/

int

main(argc, argv)

     int argc;

     char **argv;

{

  enum demangling_styles style = auto_demangling;

  int no_params;

  int is_v3_ctor;

  int is_v3_dtor;

  int ret_postfix;

  struct line format;

  struct line input;

  struct line expect;

  char *result;

  int failures = 0;

  int tests = 0;

  if (argc > 1)

    {

      fprintf (stderr, "usage: %s < test-set\n", argv[0]);

      return 2;

    }

  format.data = 0;

  input.data = 0;

  expect.data = 0;

  for (;;)

    {

      const char *inp;

      getline (&format);

      if (feof (stdin))

        break;

      getline (&input);

      getline (&expect);

      inp = protect_end (input.data);

      tests++;

      no_params = 0;

      ret_postfix = 0;

      is_v3_ctor = 0;

      is_v3_dtor = 0;

      if (format.data[0] == '\0')

        style = auto_demangling;

      else if (format.data[0] != '-')

        {

          style = cplus_demangle_name_to_style (format.data);

          if (style == unknown_demangling)

            {

              printf ("FAIL at line %d: unknown demangling style %s\n",

                      lineno, format.data);

              failures++;

              continue;

            }

        }

      else

        {

          char *p;

          char *opt;

          p = format.data;

          while (*p != '\0')

            {

              char c;

              opt = p;

              p += strcspn (p, " \t=");

              c = *p;

              *p = '\0';

              if (strcmp (opt, "--format") == 0 && c == '=')

                {

                  char *fstyle;

                  *p = c;

                  ++p;

                  fstyle = p;

                  p += strcspn (p, " \t");

                  c = *p;

                  *p = '\0';

                  style = cplus_demangle_name_to_style (fstyle);

                  if (style == unknown_demangling)

                    {

                      printf ("FAIL at line %d: unknown demangling style %s\n",

                              lineno, fstyle);

                      failures++;

                      continue;

                    }

                }

              else if (strcmp (opt, "--no-params") == 0)

                no_params = 1;

              else if (strcmp (opt, "--is-v3-ctor") == 0)

                is_v3_ctor = 1;

              else if (strcmp (opt, "--is-v3-dtor") == 0)

                is_v3_dtor = 1;

              else if (strcmp (opt, "--ret-postfix") == 0)

                ret_postfix = 1;

              else

                {

                  printf ("FAIL at line %d: unrecognized option %s\n",

                          lineno, opt);

                  failures++;

                  continue;

                }

              *p = c;

              p += strspn (p, " \t");

            }

        }

      if (is_v3_ctor || is_v3_dtor)

        {

          char buf[20];

          if (is_v3_ctor)

            {

              enum gnu_v3_ctor_kinds kc;

              kc = is_gnu_v3_mangled_ctor (inp);

              sprintf (buf, "%d", (int) kc);

            }

          else

            {

              enum gnu_v3_dtor_kinds kd;

              kd = is_gnu_v3_mangled_dtor (inp);

              sprintf (buf, "%d", (int) kd);

            }

          if (strcmp (buf, expect.data) != 0)

            {

              fail (lineno, format.data, input.data, buf, expect.data);

              failures++;

            }

          continue;

        }

      cplus_demangle_set_style (style);

      result = cplus_demangle (inp,

                               DMGL_PARAMS|DMGL_ANSI|DMGL_TYPES

                               |(ret_postfix ? DMGL_RET_POSTFIX : 0));

      if (result

          ? strcmp (result, expect.data)

          : strcmp (input.data, expect.data))

        {

          fail (lineno, format.data, input.data, result, expect.data);

          failures++;

        }

      free (result);

      if (no_params)

        {

          getline (&expect);

          result = cplus_demangle (inp, DMGL_ANSI|DMGL_TYPES);

          if (result

              ? strcmp (result, expect.data)

              : strcmp (input.data, expect.data))

            {

              fail (lineno, format.data, input.data, result, expect.data);

              failures++;

            }

          free (result);

        }

    }

  free (format.data);

  free (input.data);

  free (expect.data);

  printf ("%s: %d tests, %d failures\n", argv[0], tests, failures);

  return failures ? 1 : 0;

}