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fr-command-lha.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 *  File-Roller
 *
 *  Copyright (C) 2001 The Free Software Foundation, Inc.
 *
 *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 */

#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <glib.h>
#include <libgnomevfs/gnome-vfs-types.h>
#include <libgnomevfs/gnome-vfs-mime.h>

#include "file-data.h"
#include "file-utils.h"
#include "glib-utils.h"
#include "fr-command.h"
#include "fr-command-lha.h"

static void fr_command_lha_class_init  (FRCommandLhaClass *class);
static void fr_command_lha_init        (FRCommand         *afile);
static void fr_command_lha_finalize    (GObject           *object);

/* Parent Class */

static FRCommandClass *parent_class = NULL;


/* -- list -- */

static time_t
mktime_from_string (char *month, 
                char *mday, 
                char *time_or_year)
{
      static char  *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", 
                           "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
      struct tm     tm = {0, };
      char        **fields;

      /* date */

      if (month != NULL) {
            int i;
            for (i = 0; i < 12; i++)
                  if (strcmp (months[i], month) == 0) {
                        tm.tm_mon = i;
                        break;
                  }
      }
      tm.tm_mday = atoi (mday);
      if (strchr (time_or_year, ':') == NULL)
            tm.tm_year = atoi (time_or_year) - 1900;
      else {
            time_t     now;
            struct tm *tm_now;

            now = time (NULL);
            tm_now = localtime (&now);
            if (tm_now != NULL)
                  tm.tm_year = tm_now->tm_year;

            /* time */

            fields = g_strsplit (time_or_year, ":", 2);
            if (fields[0] != NULL) {
                  tm.tm_hour = atoi (fields[0]) - 1;
                  if (fields[1] != NULL) 
                        tm.tm_min = atoi (fields[1]);
            }
            g_strfreev (fields);
      }

      return mktime (&tm);
}


static char **
split_line_lha (char *line)
{
      char       **fields;
      int          n_fields = 7;
      const char  *scan, *field_end;
      int          i;

      fields = g_new0 (char *, n_fields + 1);
      fields[n_fields] = NULL;

      i = 0;

      if (strncmp (line, "[MS-DOS]", 8) == 0) {
            fields[i++] = g_strdup ("");
            fields[i++] = g_strdup ("");
            line += strlen ("[MS-DOS]");

      } else if (strncmp (line, "[generic]", 9) == 0) {
            fields[i++] = g_strdup ("");
            fields[i++] = g_strdup ("");
            line += strlen ("[generic]");
      }

      scan = eat_spaces (line);
      for (; i < n_fields; i++) {
            field_end = strchr (scan, ' ');
            if (field_end != NULL) {
                  fields[i] = g_strndup (scan, field_end - scan);
                  scan = eat_spaces (field_end);
            }
      }

      return fields;
}


static const char *
get_last_field_lha (char *line)
{
      int         i;
      const char *field;
      int         n = 7;

      if (strncmp (line, "[MS-DOS]", 8) == 0) 
            n--;

      if (strncmp (line, "[generic]", 9) == 0) 
            n--;

      field = eat_spaces (line);
      for (i = 0; i < n; i++) {
            field = strchr (field, ' ');
            field = eat_spaces (field);
      }

      return field;
}


static void
process_line (char     *line, 
            gpointer  data)
{
      FileData    *fdata;
      FRCommand   *comm = FR_COMMAND (data);
      char       **fields;
      const char  *name_field;

      g_return_if_fail (line != NULL);

      fdata = file_data_new ();

      fields = split_line_lha (line);
      fdata->size = g_ascii_strtoull (fields[2], NULL, 10);
      fdata->modified = mktime_from_string (fields[4], 
                                    fields[5], 
                                    fields[6]);
      g_strfreev (fields);

      /* Full path */

      name_field = get_last_field_lha (line);

      if (*name_field == '/') {
            fdata->full_path = g_strdup (name_field);
            fdata->original_path = fdata->full_path;
      } else {
            fdata->full_path = g_strconcat ("/", name_field, NULL);
            fdata->original_path = fdata->full_path + 1;
      }

      fdata->link = NULL;

      fdata->name = g_strdup (file_name_from_path (fdata->full_path));
      fdata->path = remove_level_from_path (fdata->full_path);
      fdata->type = gnome_vfs_mime_type_from_name_or_default (fdata->name, GNOME_VFS_MIME_TYPE_UNKNOWN);

      if (*fdata->name == 0)
            file_data_free (fdata);
      else
            comm->file_list = g_list_prepend (comm->file_list, fdata);
}


static void
fr_command_lha_list (FRCommand *comm)
{
      fr_process_set_out_line_func (FR_COMMAND (comm)->process, 
                              process_line,
                              comm);

      fr_process_begin_command (comm->process, "lha");
      fr_process_add_arg (comm->process, "lq");
      fr_process_add_arg (comm->process, comm->e_filename);
      fr_process_end_command (comm->process);
      fr_process_start (comm->process);
}


static void
fr_command_lha_add (FRCommand     *comm,
                GList         *file_list,
                const char    *base_dir,
                gboolean       update,
                const char    *password,
                FRCompression  compression)
{
      GList *scan;

      fr_process_begin_command (comm->process, "lha");
      if (base_dir != NULL) 
            fr_process_set_working_dir (comm->process, base_dir);
      if (update)
            fr_process_add_arg (comm->process, "u");
      else
            fr_process_add_arg (comm->process, "a");
      fr_process_add_arg (comm->process, comm->e_filename);
      for (scan = file_list; scan; scan = scan->next) 
            fr_process_add_arg (comm->process, (gchar*) scan->data);
      fr_process_end_command (comm->process);
}


static void
fr_command_lha_delete (FRCommand *comm,
                   GList     *file_list)
{
      GList *scan;

      fr_process_begin_command (comm->process, "lha");
      fr_process_add_arg (comm->process, "d");
      fr_process_add_arg (comm->process, comm->e_filename);

      for (scan = file_list; scan; scan = scan->next)
            fr_process_add_arg (comm->process, scan->data);
      fr_process_end_command (comm->process);
}


static void
fr_command_lha_extract (FRCommand  *comm,
                  GList      *file_list,
                  const char *dest_dir,
                  gboolean    overwrite,
                  gboolean    skip_older,
                  gboolean    junk_paths,
                  const char *password)
{
      GList *scan;
      char   options[5];
      int    i = 0;

      fr_process_begin_command (comm->process, "lha");
      
      if (dest_dir != NULL) 
            fr_process_set_working_dir (comm->process, dest_dir);

      options[i++] = 'x';
      options[i++] = 'f'; /* Always overwrite.
                       * The overwrite option is handled in 
                       * fr_archive_extract,
                       * this is because lha asks the user whether he
                       * wants to overwrite a file. */

      if (junk_paths)
            options[i++] = 'i';
      
      options[i++] = 0;
      fr_process_add_arg (comm->process, options);
      fr_process_add_arg (comm->process, comm->e_filename);

      for (scan = file_list; scan; scan = scan->next)
            fr_process_add_arg (comm->process, scan->data);

      fr_process_end_command (comm->process);
}


static void 
fr_command_lha_class_init (FRCommandLhaClass *class)
{
        GObjectClass   *gobject_class = G_OBJECT_CLASS (class);
        FRCommandClass *afc;

        parent_class = g_type_class_peek_parent (class);
      afc = (FRCommandClass*) class;

      gobject_class->finalize = fr_command_lha_finalize;

        afc->list         = fr_command_lha_list;
      afc->add          = fr_command_lha_add;
      afc->delete       = fr_command_lha_delete;
      afc->extract      = fr_command_lha_extract;
}

 
static void 
fr_command_lha_init (FRCommand *comm)
{
      comm->file_type = FR_FILE_TYPE_LHA;

      comm->propAddCanUpdate             = TRUE; 
      comm->propAddCanReplace            = TRUE; 
      comm->propExtractCanAvoidOverwrite = FALSE;
      comm->propExtractCanSkipOlder      = FALSE;
      comm->propExtractCanJunkPaths      = TRUE;
      comm->propPassword                 = FALSE;
      comm->propTest                     = FALSE;
}


static void 
fr_command_lha_finalize (GObject *object)
{
        g_return_if_fail (object != NULL);
        g_return_if_fail (FR_IS_COMMAND_LHA (object));

       /* Chain up */
        if (G_OBJECT_CLASS (parent_class)->finalize)
            G_OBJECT_CLASS (parent_class)->finalize (object);
}


GType
fr_command_lha_get_type ()
{
        static GType type = 0;

        if (! type) {
                GTypeInfo type_info = {
                  sizeof (FRCommandLhaClass),
                  NULL,
                  NULL,
                  (GClassInitFunc) fr_command_lha_class_init,
                  NULL,
                  NULL,
                  sizeof (FRCommandLha),
                  0,
                  (GInstanceInitFunc) fr_command_lha_init
            };

            type = g_type_register_static (FR_TYPE_COMMAND,
                                     "FRCommandLha",
                                     &type_info,
                                     0);
        }

        return type;
}


FRCommand *
fr_command_lha_new (FRProcess  *process,
                const char *filename)
{
      FRCommand *comm;

      if (!is_program_in_path("lha")) {
            return NULL;
      }

      comm = FR_COMMAND (g_object_new (FR_TYPE_COMMAND_LHA, NULL));
      fr_command_construct (comm, process, filename);

      return comm;
}

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