/* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
- Copyright (C) 2007-2011 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 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
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
/* Written by Eric Blake. */
#ifndef _@GUARD_PREFIX@_WCHAR_H
#define _@GUARD_PREFIX@_WCHAR_H
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+ The attribute __pure__ was added in gcc 2.96. */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE /* empty */
+#endif
+
/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
/* The definition of _GL_ARG_NONNULL is copied here. */
# undef btowc
# define btowc rpl_btowc
# endif
-_GL_FUNCDECL_RPL (btowc, wint_t, (int c));
+_GL_FUNCDECL_RPL (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE);
_GL_CXXALIAS_RPL (btowc, wint_t, (int c));
# else
# if !@HAVE_BTOWC@
-_GL_FUNCDECL_SYS (btowc, wint_t, (int c));
+_GL_FUNCDECL_SYS (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (btowc, wint_t, (int c));
# endif
# undef wctob
# define wctob rpl_wctob
# endif
-_GL_FUNCDECL_RPL (wctob, int, (wint_t wc));
+_GL_FUNCDECL_RPL (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE);
_GL_CXXALIAS_RPL (wctob, int, (wint_t wc));
# else
# if !defined wctob && !@HAVE_DECL_WCTOB@
/* wctob is provided by gnulib, or wctob exists but is not declared. */
-_GL_FUNCDECL_SYS (wctob, int, (wint_t wc));
+_GL_FUNCDECL_SYS (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wctob, int, (wint_t wc));
# endif
# undef wcwidth
# define wcwidth rpl_wcwidth
# endif
-_GL_FUNCDECL_RPL (wcwidth, int, (wchar_t));
+_GL_FUNCDECL_RPL (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE);
_GL_CXXALIAS_RPL (wcwidth, int, (wchar_t));
# else
# if !@HAVE_DECL_WCWIDTH@
/* wcwidth exists but is not declared. */
-_GL_FUNCDECL_SYS (wcwidth, int, (wchar_t));
+_GL_FUNCDECL_SYS (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcwidth, int, (wchar_t));
# endif
/* Search N wide characters of S for C. */
#if @GNULIB_WMEMCHR@
# if !@HAVE_WMEMCHR@
-_GL_FUNCDECL_SYS (wmemchr, wchar_t *, (const wchar_t *s, wchar_t c, size_t n));
+_GL_FUNCDECL_SYS (wmemchr, wchar_t *, (const wchar_t *s, wchar_t c, size_t n)
+ _GL_ATTRIBUTE_PURE);
# endif
/* On some systems, this function is defined as an overloaded function:
extern "C++" {
#if @GNULIB_WMEMCMP@
# if !@HAVE_WMEMCMP@
_GL_FUNCDECL_SYS (wmemcmp, int,
- (const wchar_t *s1, const wchar_t *s2, size_t n));
+ (const wchar_t *s1, const wchar_t *s2, size_t n)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wmemcmp, int,
(const wchar_t *s1, const wchar_t *s2, size_t n));
/* Return the number of wide characters in S. */
#if @GNULIB_WCSLEN@
# if !@HAVE_WCSLEN@
-_GL_FUNCDECL_SYS (wcslen, size_t, (const wchar_t *s));
+_GL_FUNCDECL_SYS (wcslen, size_t, (const wchar_t *s) _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcslen, size_t, (const wchar_t *s));
_GL_CXXALIASWARN (wcslen);
/* Return the number of wide characters in S, but at most MAXLEN. */
#if @GNULIB_WCSNLEN@
# if !@HAVE_WCSNLEN@
-_GL_FUNCDECL_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen));
+_GL_FUNCDECL_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen));
_GL_CXXALIASWARN (wcsnlen);
/* Compare S1 and S2. */
#if @GNULIB_WCSCMP@
# if !@HAVE_WCSCMP@
-_GL_FUNCDECL_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2));
+_GL_FUNCDECL_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2));
_GL_CXXALIASWARN (wcscmp);
#if @GNULIB_WCSNCMP@
# if !@HAVE_WCSNCMP@
_GL_FUNCDECL_SYS (wcsncmp, int,
- (const wchar_t *s1, const wchar_t *s2, size_t n));
+ (const wchar_t *s1, const wchar_t *s2, size_t n)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcsncmp, int,
(const wchar_t *s1, const wchar_t *s2, size_t n));
/* Compare S1 and S2, ignoring case. */
#if @GNULIB_WCSCASECMP@
# if !@HAVE_WCSCASECMP@
-_GL_FUNCDECL_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2));
+_GL_FUNCDECL_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2));
_GL_CXXALIASWARN (wcscasecmp);
#if @GNULIB_WCSNCASECMP@
# if !@HAVE_WCSNCASECMP@
_GL_FUNCDECL_SYS (wcsncasecmp, int,
- (const wchar_t *s1, const wchar_t *s2, size_t n));
+ (const wchar_t *s1, const wchar_t *s2, size_t n)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcsncasecmp, int,
(const wchar_t *s1, const wchar_t *s2, size_t n));
/* Find the first occurrence of WC in WCS. */
#if @GNULIB_WCSCHR@
# if !@HAVE_WCSCHR@
-_GL_FUNCDECL_SYS (wcschr, wchar_t *, (const wchar_t *wcs, wchar_t wc));
+_GL_FUNCDECL_SYS (wcschr, wchar_t *, (const wchar_t *wcs, wchar_t wc)
+ _GL_ATTRIBUTE_PURE);
# endif
/* On some systems, this function is defined as an overloaded function:
extern "C++" {
/* Find the last occurrence of WC in WCS. */
#if @GNULIB_WCSRCHR@
# if !@HAVE_WCSRCHR@
-_GL_FUNCDECL_SYS (wcsrchr, wchar_t *, (const wchar_t *wcs, wchar_t wc));
+_GL_FUNCDECL_SYS (wcsrchr, wchar_t *, (const wchar_t *wcs, wchar_t wc)
+ _GL_ATTRIBUTE_PURE);
# endif
/* On some systems, this function is defined as an overloaded function:
extern "C++" {
of wide characters not in REJECT. */
#if @GNULIB_WCSCSPN@
# if !@HAVE_WCSCSPN@
-_GL_FUNCDECL_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject));
+_GL_FUNCDECL_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject));
_GL_CXXALIASWARN (wcscspn);
of wide characters in ACCEPT. */
#if @GNULIB_WCSSPN@
# if !@HAVE_WCSSPN@
-_GL_FUNCDECL_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept));
+_GL_FUNCDECL_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept));
_GL_CXXALIASWARN (wcsspn);
#if @GNULIB_WCSPBRK@
# if !@HAVE_WCSPBRK@
_GL_FUNCDECL_SYS (wcspbrk, wchar_t *,
- (const wchar_t *wcs, const wchar_t *accept));
+ (const wchar_t *wcs, const wchar_t *accept)
+ _GL_ATTRIBUTE_PURE);
# endif
/* On some systems, this function is defined as an overloaded function:
extern "C++" {
#if @GNULIB_WCSSTR@
# if !@HAVE_WCSSTR@
_GL_FUNCDECL_SYS (wcsstr, wchar_t *,
- (const wchar_t *haystack, const wchar_t *needle));
+ (const wchar_t *haystack, const wchar_t *needle)
+ _GL_ATTRIBUTE_PURE);
# endif
/* On some systems, this function is defined as an overloaded function:
extern "C++" {
# undef wcswidth
# define wcswidth rpl_wcswidth
# endif
-_GL_FUNCDECL_RPL (wcswidth, int, (const wchar_t *s, size_t n));
+_GL_FUNCDECL_RPL (wcswidth, int, (const wchar_t *s, size_t n)
+ _GL_ATTRIBUTE_PURE);
_GL_CXXALIAS_RPL (wcswidth, int, (const wchar_t *s, size_t n));
# else
# if !@HAVE_WCSWIDTH@
-_GL_FUNCDECL_SYS (wcswidth, int, (const wchar_t *s, size_t n));
+_GL_FUNCDECL_SYS (wcswidth, int, (const wchar_t *s, size_t n)
+ _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (wcswidth, int, (const wchar_t *s, size_t n));
# endif