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authorJörg Frings-Fürst <debian@jff.email>2024-03-03 19:11:58 +0100
committerJörg Frings-Fürst <debian@jff.email>2024-03-03 19:11:58 +0100
commit9853b168f68cbb09b75a817343cedde2aca4c76c (patch)
treedb628840acea83dbccaf5676b89579a80e02ef51 /lib/c32is-impl.h
parentd83e85a2e6064c36f6ad3c848e39d8b8c101c4f7 (diff)
parent7cf710f6587e71a193a55d84dd6d8ae1a8a69ce0 (diff)
Merge branch 'feature/upstream' into develop
Diffstat (limited to 'lib/c32is-impl.h')
-rw-r--r--lib/c32is-impl.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/c32is-impl.h b/lib/c32is-impl.h
new file mode 100644
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+++ b/lib/c32is-impl.h
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+/* Test whether a 32-bit wide character belongs to a specific character class.
+ Copyright (C) 2020-2024 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020. */
+
+#include <wchar.h>
+#include <wctype.h>
+
+#ifdef __CYGWIN__
+# include <cygwin/version.h>
+#endif
+
+#if GNULIB_defined_mbstate_t
+# include "localcharset.h"
+# include "streq.h"
+#endif
+
+#if GL_CHAR32_T_IS_UNICODE
+# include "lc-charset-unicode.h"
+#endif
+
+#include "unictype.h"
+
+#if _GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t
+_GL_EXTERN_INLINE
+#endif
+int
+FUNC (wint_t wc)
+{
+ /* The char32_t encoding of a multibyte character is defined by the way
+ mbrtoc32() is defined. */
+
+#if GNULIB_defined_mbstate_t /* AIX, IRIX */
+ /* mbrtoc32() is defined on top of mbtowc() for the non-UTF-8 locales
+ and directly for the UTF-8 locales. */
+ if (wc != WEOF)
+ {
+ const char *encoding = locale_charset ();
+ if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
+ return UCS_FUNC (wc);
+ else
+ return WCHAR_FUNC (wc);
+ }
+ else
+ return 0;
+
+#elif HAVE_WORKING_MBRTOC32 /* glibc, Android */
+ /* mbrtoc32() is essentially defined by the system libc. */
+
+# if _GL_WCHAR_T_IS_UCS4
+ /* The char32_t encoding of a multibyte character is known to be the same as
+ the wchar_t encoding. */
+ return WCHAR_FUNC (wc);
+# else
+ /* The char32_t encoding of a multibyte character is known to be UCS-4,
+ different from the wchar_t encoding. */
+ if (wc != WEOF)
+ return UCS_FUNC (wc);
+ else
+ return 0;
+# endif
+
+#elif _GL_SMALL_WCHAR_T /* Cygwin, mingw, MSVC */
+ /* The wchar_t encoding is UTF-16.
+ The char32_t encoding is UCS-4. */
+
+# if defined __CYGWIN__ && CYGWIN_VERSION_DLL_MAJOR >= 1007
+ /* As an extension to POSIX, the iswalnum() function of Cygwin >= 1.7
+ supports also wc arguments outside the Unicode BMP, that is, outside
+ the 'wchar_t' range. See
+ <https://lists.gnu.org/archive/html/bug-gnulib/2011-02/msg00019.html>
+ = <https://cygwin.com/ml/cygwin/2011-02/msg00044.html>. */
+ return WCHAR_FUNC (wc);
+# else
+ if (wc == WEOF || wc == (wchar_t) wc)
+ /* wc is in the range for the isw* functions. */
+ return WCHAR_FUNC (wc);
+ else
+ return UCS_FUNC (wc);
+# endif
+
+#else /* macOS, FreeBSD, NetBSD, OpenBSD, HP-UX, Solaris, Minix, Android */
+ /* char32_t and wchar_t are equivalent. */
+ static_assert (sizeof (char32_t) == sizeof (wchar_t));
+
+# if GL_CHAR32_T_IS_UNICODE && GL_CHAR32_T_VS_WCHAR_T_NEEDS_CONVERSION
+ return UCS_FUNC (wc);
+# else
+ return WCHAR_FUNC (wc);
+# endif
+#endif
+}