gnulib/import/mbsrtowcs-state.c

   1 /* Convert string to wide string.
   2    Copyright (C) 2008-2019 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2008.
   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 #include <config.h>
  19
  20 #include <wchar.h>
  21
  22 /* Internal state used by the functions mbsrtowcs() and mbsnrtowcs().  */
  23 mbstate_t _gl_mbsrtowcs_state
  24 /* The state must initially be in the "initial state"; so, zero-initialize it.
  25    On most systems, putting it into BSS is sufficient.  Not so on Mac OS X 10.3,
  26    see <https://lists.gnu.org/r/bug-gnulib/2009-01/msg00329.html>.
  27    When it needs an initializer, use 0 or {0} as initializer? 0 only works
  28    when mbstate_t is a scalar type (such as when gnulib defines it, or on
  29    AIX, IRIX, mingw). {0} works as an initializer in all cases: for a struct
  30    or union type, but also for a scalar type (ISO C 99, 6.7.8.(11)).  */
  31 #if defined __ELF__
  32   /* On ELF systems, variables in BSS behave well.  */
  33 #else
  34   /* Use braces, to be on the safe side.  */
  35   = { 0 }
  36 #endif
  37   ;