path: root/common/filelist-vfs-intf.c

/*  Tux Commander VFS: convenient interface for VFS modules to a filelist tree
 *  Copyright (C) 2007-2009 Tomas Bzatek <tbzatek@users.sourceforge.net>
 *   Check for updates on tuxcmd.sourceforge.net
 *
 * 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 Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <gio/gio.h>

#include "tuxcmd-vfs.h"
#include "strutils.h"
#include "logutils.h"
#include "vfsutils.h"
#include "filelist.h"
#include "filelist-vfs-intf.h"






struct VfsFilelistData *
vfs_filelist_new (struct PathTree *files)
{
  struct VfsFilelistData * data;

  data = g_malloc0 (sizeof (struct VfsFilelistData));
  data->files = files;

  return data;
}

void
vfs_filelist_free (struct VfsFilelistData *data)
{
  if (data == NULL)
    return;
  g_free (data->list_dir_path);
  g_free (data);
}


/* -------------------------------------------------------------------------------------- */

guint64
internal_get_dir_size (struct VfsFilelistData *data, struct PathTree *tree)
{
  guint64 Size;
  struct PathTree *n;
  unsigned long idx;

  Size = 0;
  if (! data->break_get_dir_size && tree) {
    n = NULL;
    idx = 0;
    while ((n = filelist_tree_get_item_by_index (tree, idx))) {
      if (data->break_get_dir_size)
        break;
      if (n->data) {
        log_debug ("internal_get_dir_size: found item '%s', size = %zd", n->node, n->data->iSize);
        Size += (n->data->ItemType == vDirectory) ? internal_get_dir_size (data, n) : n->data->iSize;
      }
      idx++;
    }
  }
  return Size;
}

guint64
vfs_filelist_get_dir_size (struct VfsFilelistData *data, const char *APath)
{
  struct PathTree *node;

  if (! data)
    return 0;
  data->break_get_dir_size = FALSE;

  node = filelist_tree_find_node_by_path (data->files, APath);
  if (node) {
    return internal_get_dir_size (data, node);
  } else {
    log_error ("VFSGetDirSize: path '%s' not found", APath);
    return 0;
  }
}

void
vfs_filelist_get_dir_size_break (struct VfsFilelistData *data)
{
  if (data)
    data->break_get_dir_size = TRUE;
}


/* -------------------------------------------------------------------------------------- */

static struct TVFSItem *
assign_file_info (struct PathTree* node, const char *reference_full_path, gboolean follow_symlinks, gboolean add_full_path)
{
  struct TVFSItem *Item;

  Item = g_malloc (sizeof (struct TVFSItem));
  copy_vfs_item (node->data, Item);
  if (add_full_path && reference_full_path) {
    g_free (Item->FName);
    g_free (Item->FDisplayName);
    Item->FName = g_strdup (reference_full_path);
    Item->FDisplayName = g_filename_display_name (reference_full_path);
  }
  if (follow_symlinks && node->symlink_target_data) {
    Item->iSize = node->symlink_target_data->iSize;
    Item->iPackedSize = node->symlink_target_data->iPackedSize;
    Item->ItemType = node->symlink_target_data->ItemType;
  }
  return Item;
}

struct TVFSItem *
vfs_filelist_file_info (struct VfsFilelistData *data, const char *AFileName, gboolean FollowSymlinks, gboolean AddFullPath, GError **error)
{
  struct PathTree *node;

  if (data && data->files) {
    node = filelist_tree_find_node_by_path (data->files, AFileName);
    if (node) {
      if (node->data) {
        log_debug ("vfs_filelist_file_info: found file: '%s'", node->node);
        return assign_file_info (node, AFileName, FollowSymlinks, AddFullPath);
      } else {
        log_error ("vfs_filelist_file_info: node->data == NULL!");
        g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED, "node->data == NULL");
        return NULL;
      }
    } else {
      log_error ("vfs_filelist_file_info: file specified not found");
      g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND, "File specified not found.");
      return NULL;
    }
  } else {
    log_error ("vfs_filelist_file_info: Invalid pointers to data objects.");
    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, "Invalid pointers to data objects.");
    return NULL;
  }
}

struct TVFSItem *
vfs_filelist_list_first (struct VfsFilelistData *data, const char *sDir, gboolean FollowSymlinks, gboolean AddFullPath, GError **error)
{
  struct PathTree *node;
  char *full_path;
  struct TVFSItem *Item;

  data->list_dir_index = -1;
  data->list_dir_node = NULL;

  if (sDir == NULL) {
    log_error ("vfs_filelist_list_first: sDir is NULL!");
    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, "NewPath is NULL");
    return NULL;
  }

  data->list_dir_index = 0;
  data->list_dir_node = filelist_tree_find_node_by_path (data->files, sDir);
  data->follow_symlinks = FollowSymlinks;
  data->add_full_path = AddFullPath;
  data->list_dir_path = include_trailing_path_sep (sDir);

  /*  Find the directory in the filelist  */
  if (data->list_dir_node) {
    node = filelist_tree_get_item_by_index (data->list_dir_node, data->list_dir_index);
    if (node) {
      full_path = NULL;
      if (AddFullPath)
        full_path = g_build_filename (sDir, node->data->FName, NULL);
      Item = assign_file_info (node, full_path, FollowSymlinks, AddFullPath);
      g_free (full_path);
      log_debug ("vfs_filelist_list_first: found file: %s", Item->FName);
      return Item;
    } else {
      log_debug ("vfs_filelist_list_first: no more files");
      return NULL;
    }
  } else {
    log_error ("vfs_filelist_list_first: Directory '%s' not found.", sDir);
    g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND, "Directory '%s' not found.", sDir);
    return NULL;
  }
}

struct TVFSItem *
vfs_filelist_list_next (struct VfsFilelistData *data, GError **error)
{
  struct PathTree *node;
  char *full_path;
  struct TVFSItem *Item;

  full_path = NULL;
  if (! data->list_dir_node) {
    log_error ("vfs_filelist_list_next: data->list_dir_node is NULL!");
    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED, "data->list_dir_node is NULL");
    return NULL;
  }
  data->list_dir_index++;

  node = filelist_tree_get_item_by_index (data->list_dir_node, data->list_dir_index);
  if (node) {
    if (data->add_full_path)
      full_path = g_build_filename (data->list_dir_path, node->data->FName, NULL);
    Item = assign_file_info (node, full_path, data->follow_symlinks, data->add_full_path);
    g_free (full_path);
    log_debug ("vfs_filelist_list_next: found file: %s", Item->FName);
    return Item;
  } else {
    log_debug ("vfs_filelist_list_next: no more files");
    return NULL;
  }
}

gboolean
vfs_filelist_list_close (struct VfsFilelistData *data, GError **error)
{
  data->list_dir_index = -1;
  data->list_dir_node = NULL;
  g_free (data->list_dir_path);
  data->list_dir_path = NULL;
  return TRUE;
}


/* -------------------------------------------------------------------------------------- */

char *
vfs_filelist_change_dir (struct VfsFilelistData *data, const char *NewPath, GError **error)
{
  char *ANewPath;

  if (NewPath == NULL) {
    log_error ("VFSChangeDir: NewPath is NULL!");
    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, "NewPath is NULL");
    return NULL;
  }

  /*  make up the target path  */
  log_debug ("VFSChangeDir: Going to change dir from '%s'", NewPath);
  ANewPath = exclude_trailing_path_sep (NewPath);
  if (! ANewPath || strlen (ANewPath) <= 0)
    ANewPath = g_strdup ("/");
  log_debug ("VFSChangeDir: Going to change dir to   '%s'", ANewPath);

  /*  find the directory in the filelist  */
  if (filelist_tree_find_node_by_path (data->files, ANewPath)) {
    return ANewPath;
  } else {
    log_error ("VFSChangeDir: Directory '%s' not found.", ANewPath);
    g_free (ANewPath);
    g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND, "Directory '%s' not found.", ANewPath);
    return NULL;
  }
}