qacl: new module, broken out from the acl module This is for GNU Emacs, which wants the acl functions but does not want 'error' invoked when they fail. * lib/acl-internal.h: Do not include error.h, quote.h. (ENOSYS, ENOTSUP): Remove; no longer needed. (ACL_NOT_WELL_SUPPORTED): Remove; replaced by acl_errno_valid. * lib/acl.h: Include <stdbool.h>. (acl_errno_valid): New function. * lib/copy-acl.c, lib/set-acl.c: Include errno,h, not acl-internal.h. * lib/copy-acl.c (qcopy_acl): Move to lib/qcopy-acl.c. * lib/set-acl.c: Rename from lib/set-mode-acl.c. (chmod_or_fchmod, qset_acl): Move to lib/qset-acl.c. (ACL_INTERNAL_INLINE): Remove; no longer needed. * lib/file-has-acl.c (file_has_acl): * lib/qcopy-acl.c (qcopy_acl): * lib/qset-acl.c (qset_acl): Use acl_errno_valid instead of ACL_NOT_WELL_SUPPORTED. * modules/acl (Files): Move lib/acl.h, lib/acl-internal.h, lib/acl_entries.c, lib/set-mode-acl.c (renamed to lib/set-acl.c), lib/file-has-acl.c, m4/acl.m4 to qacl module. Add lib/set-acl.c. (Depends-on): Move extern-inline, fstat, sys_stat to qacl module. Add qacl. (configure.ac): Move gl_FUNC_ACL to qacl module. (lib_SOURCES): Remove file-has-acl.c (moved to qacl module). Rename set-mode-acl.c to set-acl.c. * lib/acl-errno-valid.c: New file. * lib/qcopy-acl.c: New file, moved from the old lib/copy-acl.c; the copy_acl function remains in copy-acl.c. * lib/qcopy-acl.c, lib/qset-acl.c: Do not include gettext.h. (_): Remove; not needed. * lib/qset-acl.c: New file, moved from the old lib/set-mode-acl.c; the set_acl function remains in set-acl.c (renamed from set-mode-acl.c). * modules/qacl: New file, moved from the old modules/acl. (Files, lib_SOURCES): Add acl-errno-valid.c, qcopy-acl.c, qset-acl.c. Remove set-mode-acl.c, copy-acl.c. (Depends-on): Remove error, gettext-h, quote. Add stdbool.

/* Determine number of screen columns needed for a size-bounded wide string.
   Copyright (C) 1999, 2011-2013 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 1999.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

int
wcswidth (const wchar_t *s, size_t n)
{
  int count = 0;
  for (; n > 0; s++, n--)
    {
      wchar_t c = *s;
      if (c == (wchar_t)'\0')
        break;
      {
        int width = wcwidth (c);
        if (width < 0)
          goto found_nonprinting;
        if (width > INT_MAX - count)
          goto overflow;
        count += width;
      }
    }
  return count;

 found_nonprinting:
  return -1;

 overflow:
  return INT_MAX;
}