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/* VMS archive wrapper.

   Copyright (C) 2011 Free Software Foundation, Inc.

   Contributed by AdaCore.

This file is part of GCC.

GCC 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, or (at your option)

any later version.

GCC 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 GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "libiberty.h"

#define FATAL_EXIT_CODE (44 | 0x10000000)

/* Librarian arguments.  */

static int lib_arg_max = 0;

static const char **lib_args;

static int lib_arg_index = -1;

/* Set for r/c/x/v command.  */

static int replace_mode = 0;

static int create_mode = 0;

static int extract_mode = 0;

static int verbose_mode = 0;

static char modecmd[32];

static char libname[256];

#define TEMP_FILE "arXXXXXX"

#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)

#define SUFFIX ".com"

#define SUFFIX_LEN (sizeof(SUFFIX) - 1)

static char *to_host_file_spec (char *filespec);

static int is_regular_file (char *name);

#ifdef VMS

static char new_host_filespec [255];

static char filename_buff [256];

static int

translate_unix (char *name, int type)

{

  strcpy (filename_buff, name);

  return 0;

}

#endif

static char *

to_host_file_spec (char *filespec)

{

#ifdef VMS

  if (strchr (filespec, ']') || strchr (filespec, ':'))

    return filespec;

  else

    {

      strcpy (filename_buff, filespec);

      decc$to_vms (filespec, translate_unix, 1, 1);

      strcpy (new_host_filespec, filename_buff);

      return new_host_filespec;

    }

#else

  return filespec;

#endif

}

/* Check to see if the file named in NAME is a regular file, i.e. not a

   directory.  */

static int

is_regular_file (char *name)

{

  int ret;

  struct stat statbuf;

  ret = stat (name, &statbuf);

  return !ret && S_ISREG (statbuf.st_mode);

}

/* Add the argument contained in STR to the list of arguments to pass to the

   archiver.  */

static void

addarg (const char *str)

{

  if (++lib_arg_index >= lib_arg_max)

    {

      lib_arg_max += 1000;

      lib_args = XRESIZEVEC (const char *, lib_args, lib_arg_max);

    }

  lib_args[lib_arg_index] = str;

}

static void

usage (void)

{

  printf ("usage: ar -r [-cv] archive file...\n");

  printf ("       ar -c [-rv] archive file...\n");

  printf ("       ar -x [-v] archive [module...]\n");

}

int

main (int argc, char *argv[])

{

  int i, nexti, iarg;

  FILE *comfile;

  int comfd;

  int outlen, maxoutlen = 4000;

  char temp_filename[] = TEMP_FILE SUFFIX;

  char command[256];

  int status;

  if (argc < 2)

    {

      fprintf (stderr, "ar: no command or archive\n");

      exit (FATAL_EXIT_CODE);

    }

  if (argv[1][0] != '-')

    {

      int arglen = strlen (argv[1]);

      /* Compatibility mode.  */

      for (i = 0; i < arglen; i++)

        {

          if (argv[1][i] == 'r')

            {

              replace_mode = 1;

            }

          else if (argv[1][i] == 'c')

            {

              create_mode = 1;

            }

          else if (argv[1][i] == 'x')

            {

              extract_mode = 1;

            }

          else if (argv[1][i] == 'v')

            {

              verbose_mode = 1;

            }

          else

            {

              fprintf (stderr, "ar: unknown command '%c'\n", argv[1][i]);

              exit (FATAL_EXIT_CODE);

            }

        }

      nexti = 2;

    }

  else

    {

      /* Option mode.  */

      nexti = 1;

      for (i = 1; i < argc; i++)

        {

          if (argv[i][0] != '-')

            {

              nexti = i;

              break;

            }

          else if (strcmp (argv[i], "-r") == 0)

            {

              replace_mode = 1;

            }

          else if (strcmp (argv[i], "-c") == 0)

            {

              create_mode = 1;

            }

          else if (strcmp (argv[i], "-x") == 0)

            {

              extract_mode = 1;

            }

          else if (strcmp (argv[i], "-v") == 0)

            {

              verbose_mode = 1;

            }

          else if (strcmp (argv[i], "--help") == 0)

            {

              usage ();

              exit (EXIT_SUCCESS);

            }

          else

            {

              fprintf (stderr, "ar: unknown option %s\n", argv[i]);

              exit (FATAL_EXIT_CODE);

            }

        }

    }

  if (extract_mode)

    {

      do

        {

          char *lname = argv[nexti];

          int lnamelen;

          /* Next argument is the archive name.  */

          if (is_regular_file (lname))

            {

              addarg (xstrdup (to_host_file_spec (lname)));

              break;

            }

          /* If not found, try with .olb instead of .a.  */

          lnamelen = strlen (lname);

          if (lnamelen > 2

              && strcmp (&lname [lnamelen - 2], ".a") == 0)

            {

              char *nlibname;

              nlibname = (char *)alloca (lnamelen + 3);

              strcpy (nlibname, lname);

              strcpy (&nlibname [lnamelen - 2], ".olb");

              if (is_regular_file (nlibname))

                {

                  addarg (xstrdup (to_host_file_spec (nlibname)));

                  break;

                }

            }

          fprintf (stderr, "ar: file '%s' doesn't exist\n", lname);

          exit (FATAL_EXIT_CODE);

        } while (0);

    }

  else

    strcpy (libname, to_host_file_spec (argv[nexti]));

  nexti++;

  /* Build command mode.  */

  if (replace_mode)

    {

      strcat (modecmd, "/replace");

      if (!is_regular_file (libname) || !replace_mode)

        {

          /* Really create if the archive doesn't exist.  */

          strcat (modecmd, "/create");

        }

    }

  else if (extract_mode)

    {

      if (nexti == argc)

        {

          /* Extract all.  */

          strcat (modecmd, "/extract=(*");

        }

      else

        strcat (modecmd, "/extract=(");

    }

  /* Add files.  */

  for (i = nexti; i < argc; i++)

    {

      if (extract_mode)

        {

          /* Convert to module name (remove extension) and quote it.  */

          char *module = argv[i];

          int module_len = strlen (module);

          char *newarg = (char *)xmalloc (module_len + 3);

          int l;

          newarg[0] = '"';

          memcpy (newarg + 1, module, module_len);

          l = 1 + module_len;

          if (module_len > 4

              && strcmp (&module[module_len - 4], ".obj") == 0)

            l -= 4;

          newarg[l] = '"';

          newarg[l + 1] = 0;

          addarg (newarg);

        }

      else

        {

          /* Add the filename.  */

          addarg (xstrdup (to_host_file_spec (argv[i])));

        }

    }

  if (extract_mode)

    addarg (")");

  /* Create the command file name.  */

  strcpy (temp_filename, TEMP_FILE SUFFIX);

  comfd = mkstemps (temp_filename, SUFFIX_LEN);

  comfile = fdopen (comfd, "w");

  /* Write the command file.

     We need to split to command into severals ones if it is too long.  */

  outlen = 0;

  for (iarg = 0; iarg <= lib_arg_index; iarg++)

    {

      if (outlen == 0)

        {

          fprintf (comfile, "$ library %s %s -\n", modecmd, libname);

          if (create_mode && iarg == 0)

            strcpy (modecmd, "/replace");

        }

      fprintf (comfile, "%s", lib_args [iarg]);

      outlen += strlen (lib_args [iarg]) + 2;

      if (outlen > maxoutlen || iarg == lib_arg_index)

        {

          /* Will write a new command.  */

          fprintf (comfile, "\n");

          outlen = 0;

        }

      else

        {

          /* Continuation line.  */

          fprintf (comfile, ",-\n");

        }

    }

  fclose (comfile);

  sprintf (command, "@%s", temp_filename);

  status = system (command);

  remove (temp_filename);

  exit (status);

}