lib/gl_sublist.h

   1 /* Sequential list data type backed by another list.
   2    Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2006.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _GL_SUBLIST_H
  19 #define _GL_SUBLIST_H
  20
  21 #include "gl_list.h"
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27
  28 /* Creates a sublist of a given list.
  29    This is the list of elements with indices i, start_index <= i < end_index.
  30    The sublist is backed by the given list, which means:
  31      - Modifications to the sublist affect the whole list.
  32      - Modifications to the whole list are immediately visible in the sublist.
  33      - The sublist is only valid as long as the whole list is valid.
  34      - The sublist must not be passed to the gl_list_sortedlist_add() function.
  35  */
  36 #if 0 /* declared in gl_xsublist.h */
  37 extern gl_list_t gl_sublist_create (gl_list_t whole_list,
  38                                     size_t start_index, size_t end_index);
  39 #endif
  40 /* Likewise.  Returns NULL upon out-of-memory.  */
  41 extern gl_list_t gl_sublist_nx_create (gl_list_t whole_list,
  42                                        size_t start_index, size_t end_index);
  43
  44
  45 #ifdef __cplusplus
  46 }
  47 #endif
  48
  49 #endif /* _GL_SUBLIST_H */