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-rw-r--r--lib/string.in.h1269
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diff --git a/lib/string.in.h b/lib/string.in.h
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--- /dev/null
+++ b/lib/string.in.h
@@ -0,0 +1,1269 @@
+/* A GNU-like <string.h>.
+
+ Copyright (C) 1995-1996, 2001-2022 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/>. */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_STRING_H
+/* Special invocation convention:
+ - On OS X/NetBSD we have a sequence of nested includes
+ <string.h> -> <strings.h> -> "string.h"
+ In this situation system _chk variants due to -D_FORTIFY_SOURCE
+ might be used after any replacements defined here. */
+
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#else
+/* Normal invocation convention. */
+
+#ifndef _@GUARD_PREFIX@_STRING_H
+
+#define _GL_ALREADY_INCLUDING_STRING_H
+
+/* The include_next requires a split double-inclusion guard. */
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#undef _GL_ALREADY_INCLUDING_STRING_H
+
+#ifndef _@GUARD_PREFIX@_STRING_H
+#define _@GUARD_PREFIX@_STRING_H
+
+/* NetBSD 5.0 mis-defines NULL. */
+#include <stddef.h>
+
+/* MirBSD defines mbslen as a macro. */
+#if @GNULIB_MBSLEN@ && defined __MirBSD__
+# include <wchar.h>
+#endif
+
+/* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>. */
+/* But in any case avoid namespace pollution on glibc systems. */
+#if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK) && defined __NetBSD__ \
+ && ! defined __GLIBC__
+# include <unistd.h>
+#endif
+
+/* AIX 7.2 declares ffsl and ffsll in <strings.h>, not in <string.h>. */
+/* But in any case avoid namespace pollution on glibc systems. */
+#if ((@GNULIB_FFSL@ || @GNULIB_FFSLL@ || defined GNULIB_POSIXCHECK) \
+ && defined _AIX) \
+ && ! defined __GLIBC__
+# include <strings.h>
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC (F, I) declares that the function returns pointers
+ that can be freed by passing them as the Ith argument to the
+ function F. */
+#ifndef _GL_ATTRIBUTE_DEALLOC
+# if __GNUC__ >= 11
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+# else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+# endif
+#endif
+
+/* _GL_ATTRIBUTE_DEALLOC_FREE declares that the function returns pointers that
+ can be freed via 'free'; it can be used only after declaring 'free'. */
+/* Applies to: functions. Cannot be used on inline functions. */
+#ifndef _GL_ATTRIBUTE_DEALLOC_FREE
+# define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+#endif
+
+/* _GL_ATTRIBUTE_MALLOC declares that the function returns a pointer to freshly
+ allocated memory. */
+/* Applies to: functions. */
+#ifndef _GL_ATTRIBUTE_MALLOC
+# if __GNUC__ >= 3 || defined __clang__
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+# else
+# define _GL_ATTRIBUTE_MALLOC
+# endif
+#endif
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+ The attribute __pure__ was added in gcc 2.96. */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+# define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
+
+/* The definition of _GL_ARG_NONNULL is copied here. */
+
+/* The definition of _GL_WARN_ON_USE is copied here. */
+
+/* Make _GL_ATTRIBUTE_DEALLOC_FREE work, even though <stdlib.h> may not have
+ been included yet. */
+#if @GNULIB_FREE_POSIX@
+# if (@REPLACE_FREE@ && !defined free \
+ && !(defined __cplusplus && defined GNULIB_NAMESPACE))
+/* We can't do '#define free rpl_free' here. */
+_GL_EXTERN_C void rpl_free (void *);
+# undef _GL_ATTRIBUTE_DEALLOC_FREE
+# define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (rpl_free, 1)
+# else
+# if defined _MSC_VER
+_GL_EXTERN_C void __cdecl free (void *);
+# else
+_GL_EXTERN_C void free (void *);
+# endif
+# endif
+#else
+# if defined _MSC_VER
+_GL_EXTERN_C void __cdecl free (void *);
+# else
+_GL_EXTERN_C void free (void *);
+# endif
+#endif
+
+/* Clear a block of memory. The compiler will not delete a call to
+ this function, even if the block is dead after the call. */
+#if @GNULIB_EXPLICIT_BZERO@
+# if ! @HAVE_EXPLICIT_BZERO@
+_GL_FUNCDECL_SYS (explicit_bzero, void,
+ (void *__dest, size_t __n) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (explicit_bzero, void, (void *__dest, size_t __n));
+_GL_CXXALIASWARN (explicit_bzero);
+#elif defined GNULIB_POSIXCHECK
+# undef explicit_bzero
+# if HAVE_RAW_DECL_EXPLICIT_BZERO
+_GL_WARN_ON_USE (explicit_bzero, "explicit_bzero is unportable - "
+ "use gnulib module explicit_bzero for portability");
+# endif
+#endif
+
+/* Find the index of the least-significant set bit. */
+#if @GNULIB_FFSL@
+# if !@HAVE_FFSL@
+_GL_FUNCDECL_SYS (ffsl, int, (long int i));
+# endif
+_GL_CXXALIAS_SYS (ffsl, int, (long int i));
+_GL_CXXALIASWARN (ffsl);
+#elif defined GNULIB_POSIXCHECK
+# undef ffsl
+# if HAVE_RAW_DECL_FFSL
+_GL_WARN_ON_USE (ffsl, "ffsl is not portable - use the ffsl module");
+# endif
+#endif
+
+
+/* Find the index of the least-significant set bit. */
+#if @GNULIB_FFSLL@
+# if @REPLACE_FFSLL@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define ffsll rpl_ffsll
+# endif
+_GL_FUNCDECL_RPL (ffsll, int, (long long int i));
+_GL_CXXALIAS_RPL (ffsll, int, (long long int i));
+# else
+# if !@HAVE_FFSLL@
+_GL_FUNCDECL_SYS (ffsll, int, (long long int i));
+# endif
+_GL_CXXALIAS_SYS (ffsll, int, (long long int i));
+# endif
+_GL_CXXALIASWARN (ffsll);
+#elif defined GNULIB_POSIXCHECK
+# undef ffsll
+# if HAVE_RAW_DECL_FFSLL
+_GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
+# endif
+#endif
+
+
+#if @GNULIB_MDA_MEMCCPY@
+/* On native Windows, map 'memccpy' to '_memccpy', so that -loldnames is not
+ required. In C++ with GNULIB_NAMESPACE, avoid differences between
+ platforms by defining GNULIB_NAMESPACE::memccpy always. */
+# if defined _WIN32 && !defined __CYGWIN__
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef memccpy
+# define memccpy _memccpy
+# endif
+_GL_CXXALIAS_MDA (memccpy, void *,
+ (void *dest, const void *src, int c, size_t n));
+# else
+_GL_CXXALIAS_SYS (memccpy, void *,
+ (void *dest, const void *src, int c, size_t n));
+# endif
+_GL_CXXALIASWARN (memccpy);
+#endif
+
+
+/* Return the first instance of C within N bytes of S, or NULL. */
+#if @GNULIB_MEMCHR@
+# if @REPLACE_MEMCHR@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef memchr
+# define memchr rpl_memchr
+# endif
+_GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
+# else
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C" { const void * std::memchr (const void *, int, size_t); }
+ extern "C++" { void * std::memchr (void *, int, size_t); } */
+_GL_CXXALIAS_SYS_CAST2 (memchr,
+ void *, (void const *__s, int __c, size_t __n),
+ void const *, (void const *__s, int __c, size_t __n));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
+_GL_CXXALIASWARN1 (memchr, void const *,
+ (void const *__s, int __c, size_t __n));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (memchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memchr
+/* Assume memchr is always declared. */
+_GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
+ "use gnulib module memchr for portability" );
+#endif
+
+/* Return the first occurrence of NEEDLE in HAYSTACK. */
+#if @GNULIB_MEMMEM@
+# if @REPLACE_MEMMEM@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define memmem rpl_memmem
+# endif
+_GL_FUNCDECL_RPL (memmem, void *,
+ (void const *__haystack, size_t __haystack_len,
+ void const *__needle, size_t __needle_len)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (memmem, void *,
+ (void const *__haystack, size_t __haystack_len,
+ void const *__needle, size_t __needle_len));
+# else
+# if ! @HAVE_DECL_MEMMEM@
+_GL_FUNCDECL_SYS (memmem, void *,
+ (void const *__haystack, size_t __haystack_len,
+ void const *__needle, size_t __needle_len)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 3)));
+# endif
+_GL_CXXALIAS_SYS (memmem, void *,
+ (void const *__haystack, size_t __haystack_len,
+ void const *__needle, size_t __needle_len));
+# endif
+_GL_CXXALIASWARN (memmem);
+#elif defined GNULIB_POSIXCHECK
+# undef memmem
+# if HAVE_RAW_DECL_MEMMEM
+_GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
+ "use gnulib module memmem-simple for portability, "
+ "and module memmem for speed" );
+# endif
+#endif
+
+/* Copy N bytes of SRC to DEST, return pointer to bytes after the
+ last written byte. */
+#if @GNULIB_MEMPCPY@
+# if ! @HAVE_MEMPCPY@
+_GL_FUNCDECL_SYS (mempcpy, void *,
+ (void *restrict __dest, void const *restrict __src,
+ size_t __n)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (mempcpy, void *,
+ (void *restrict __dest, void const *restrict __src,
+ size_t __n));
+_GL_CXXALIASWARN (mempcpy);
+#elif defined GNULIB_POSIXCHECK
+# undef mempcpy
+# if HAVE_RAW_DECL_MEMPCPY
+_GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
+ "use gnulib module mempcpy for portability");
+# endif
+#endif
+
+/* Search backwards through a block for a byte (specified as an int). */
+#if @GNULIB_MEMRCHR@
+# if ! @HAVE_DECL_MEMRCHR@
+_GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+# endif
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C++" { const void * std::memrchr (const void *, int, size_t); }
+ extern "C++" { void * std::memrchr (void *, int, size_t); } */
+_GL_CXXALIAS_SYS_CAST2 (memrchr,
+ void *, (void const *, int, size_t),
+ void const *, (void const *, int, size_t));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
+_GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
+# else
+_GL_CXXALIASWARN (memrchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memrchr
+# if HAVE_RAW_DECL_MEMRCHR
+_GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
+ "use gnulib module memrchr for portability");
+# endif
+#endif
+
+/* Find the first occurrence of C in S. More efficient than
+ memchr(S,C,N), at the expense of undefined behavior if C does not
+ occur within N bytes. */
+#if @GNULIB_RAWMEMCHR@
+# if ! @HAVE_RAWMEMCHR@
+_GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+# endif
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C++" { const void * std::rawmemchr (const void *, int); }
+ extern "C++" { void * std::rawmemchr (void *, int); } */
+_GL_CXXALIAS_SYS_CAST2 (rawmemchr,
+ void *, (void const *__s, int __c_in),
+ void const *, (void const *__s, int __c_in));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
+_GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
+# else
+_GL_CXXALIASWARN (rawmemchr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef rawmemchr
+# if HAVE_RAW_DECL_RAWMEMCHR
+_GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
+ "use gnulib module rawmemchr for portability");
+# endif
+#endif
+
+/* Copy SRC to DST, returning the address of the terminating '\0' in DST. */
+#if @GNULIB_STPCPY@
+# if ! @HAVE_STPCPY@
+_GL_FUNCDECL_SYS (stpcpy, char *,
+ (char *restrict __dst, char const *restrict __src)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (stpcpy, char *,
+ (char *restrict __dst, char const *restrict __src));
+_GL_CXXALIASWARN (stpcpy);
+#elif defined GNULIB_POSIXCHECK
+# undef stpcpy
+# if HAVE_RAW_DECL_STPCPY
+_GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
+ "use gnulib module stpcpy for portability");
+# endif
+#endif
+
+/* Copy no more than N bytes of SRC to DST, returning a pointer past the
+ last non-NUL byte written into DST. */
+#if @GNULIB_STPNCPY@
+# if @REPLACE_STPNCPY@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef stpncpy
+# define stpncpy rpl_stpncpy
+# endif
+_GL_FUNCDECL_RPL (stpncpy, char *,
+ (char *restrict __dst, char const *restrict __src,
+ size_t __n)
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (stpncpy, char *,
+ (char *restrict __dst, char const *restrict __src,
+ size_t __n));
+# else
+# if ! @HAVE_STPNCPY@
+_GL_FUNCDECL_SYS (stpncpy, char *,
+ (char *restrict __dst, char const *restrict __src,
+ size_t __n)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (stpncpy, char *,
+ (char *restrict __dst, char const *restrict __src,
+ size_t __n));
+# endif
+_GL_CXXALIASWARN (stpncpy);
+#elif defined GNULIB_POSIXCHECK
+# undef stpncpy
+# if HAVE_RAW_DECL_STPNCPY
+_GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
+ "use gnulib module stpncpy for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strchr() does not work with multibyte strings if the locale encoding is
+ GB18030 and the character to be searched is a digit. */
+# undef strchr
+/* Assume strchr is always declared. */
+_GL_WARN_ON_USE_CXX (strchr,
+ const char *, char *, (const char *, int),
+ "strchr cannot work correctly on character strings "
+ "in some multibyte locales - "
+ "use mbschr if you care about internationalization");
+#endif
+
+/* Find the first occurrence of C in S or the final NUL byte. */
+#if @GNULIB_STRCHRNUL@
+# if @REPLACE_STRCHRNUL@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define strchrnul rpl_strchrnul
+# endif
+_GL_FUNCDECL_RPL (strchrnul, char *, (const char *__s, int __c_in)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strchrnul, char *,
+ (const char *str, int ch));
+# else
+# if ! @HAVE_STRCHRNUL@
+_GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+# endif
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C++" { const char * std::strchrnul (const char *, int); }
+ extern "C++" { char * std::strchrnul (char *, int); } */
+_GL_CXXALIAS_SYS_CAST2 (strchrnul,
+ char *, (char const *__s, int __c_in),
+ char const *, (char const *__s, int __c_in));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
+_GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
+# else
+_GL_CXXALIASWARN (strchrnul);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strchrnul
+# if HAVE_RAW_DECL_STRCHRNUL
+_GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
+ "use gnulib module strchrnul for portability");
+# endif
+#endif
+
+/* Duplicate S, returning an identical malloc'd string. */
+#if @GNULIB_STRDUP@
+# if @REPLACE_STRDUP@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strdup
+# define strdup rpl_strdup
+# endif
+_GL_FUNCDECL_RPL (strdup, char *,
+ (char const *__s)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
+# elif defined _WIN32 && !defined __CYGWIN__
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strdup
+# define strdup _strdup
+# endif
+_GL_CXXALIAS_MDA (strdup, char *, (char const *__s));
+# else
+# if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
+ /* strdup exists as a function and as a macro. Get rid of the macro. */
+# undef strdup
+# endif
+# if (!@HAVE_DECL_STRDUP@ || __GNUC__ >= 11) && !defined strdup
+_GL_FUNCDECL_SYS (strdup, char *,
+ (char const *__s)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+_GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
+# endif
+_GL_CXXALIASWARN (strdup);
+#else
+# if __GNUC__ >= 11 && !defined strdup
+/* For -Wmismatched-dealloc: Associate strdup with free or rpl_free. */
+_GL_FUNCDECL_SYS (strdup, char *,
+ (char const *__s)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+# undef strdup
+# if HAVE_RAW_DECL_STRDUP
+_GL_WARN_ON_USE (strdup, "strdup is unportable - "
+ "use gnulib module strdup for portability");
+# endif
+# elif @GNULIB_MDA_STRDUP@
+/* On native Windows, map 'creat' to '_creat', so that -loldnames is not
+ required. In C++ with GNULIB_NAMESPACE, avoid differences between
+ platforms by defining GNULIB_NAMESPACE::strdup always. */
+# if defined _WIN32 && !defined __CYGWIN__
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strdup
+# define strdup _strdup
+# endif
+_GL_CXXALIAS_MDA (strdup, char *, (char const *__s));
+# else
+# if defined __cplusplus && defined GNULIB_NAMESPACE && defined strdup
+# undef strdup
+# endif
+_GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
+# endif
+_GL_CXXALIASWARN (strdup);
+# endif
+#endif
+
+/* Append no more than N characters from SRC onto DEST. */
+#if @GNULIB_STRNCAT@
+# if @REPLACE_STRNCAT@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strncat
+# define strncat rpl_strncat
+# endif
+_GL_FUNCDECL_RPL (strncat, char *,
+ (char *restrict dest, const char *restrict src, size_t n)
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strncat, char *,
+ (char *restrict dest, const char *restrict src, size_t n));
+# else
+_GL_CXXALIAS_SYS (strncat, char *,
+ (char *restrict dest, const char *restrict src, size_t n));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strncat);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strncat
+# if HAVE_RAW_DECL_STRNCAT
+_GL_WARN_ON_USE (strncat, "strncat is unportable - "
+ "use gnulib module strncat for portability");
+# endif
+#endif
+
+/* Return a newly allocated copy of at most N bytes of STRING. */
+#if @GNULIB_STRNDUP@
+# if @REPLACE_STRNDUP@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strndup
+# define strndup rpl_strndup
+# endif
+_GL_FUNCDECL_RPL (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+_GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
+# else
+# if !@HAVE_DECL_STRNDUP@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+_GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
+# endif
+_GL_CXXALIASWARN (strndup);
+#else
+# if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate strndup with free or rpl_free. */
+_GL_FUNCDECL_SYS (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+# undef strndup
+# if HAVE_RAW_DECL_STRNDUP
+_GL_WARN_ON_USE (strndup, "strndup is unportable - "
+ "use gnulib module strndup for portability");
+# endif
+# endif
+#endif
+
+/* Find the length (number of bytes) of STRING, but scan at most
+ MAXLEN bytes. If no '\0' terminator is found in that many bytes,
+ return MAXLEN. */
+#if @GNULIB_STRNLEN@
+# if @REPLACE_STRNLEN@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strnlen
+# define strnlen rpl_strnlen
+# endif
+_GL_FUNCDECL_RPL (strnlen, size_t, (char const *__s, size_t __maxlen)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strnlen, size_t, (char const *__s, size_t __maxlen));
+# else
+# if ! @HAVE_DECL_STRNLEN@
+_GL_FUNCDECL_SYS (strnlen, size_t, (char const *__s, size_t __maxlen)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
+# endif
+_GL_CXXALIASWARN (strnlen);
+#elif defined GNULIB_POSIXCHECK
+# undef strnlen
+# if HAVE_RAW_DECL_STRNLEN
+_GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
+ "use gnulib module strnlen for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strcspn() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it does not work with multibyte strings if the
+ locale encoding is GB18030 and one of the characters to be searched is a
+ digit. */
+# undef strcspn
+/* Assume strcspn is always declared. */
+_GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
+ "in multibyte locales - "
+ "use mbscspn if you care about internationalization");
+#endif
+
+/* Find the first occurrence in S of any character in ACCEPT. */
+#if @GNULIB_STRPBRK@
+# if ! @HAVE_STRPBRK@
+_GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C" { const char * strpbrk (const char *, const char *); }
+ extern "C++" { char * strpbrk (char *, const char *); } */
+_GL_CXXALIAS_SYS_CAST2 (strpbrk,
+ char *, (char const *__s, char const *__accept),
+ const char *, (char const *__s, char const *__accept));
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
+_GL_CXXALIASWARN1 (strpbrk, char const *,
+ (char const *__s, char const *__accept));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (strpbrk);
+# endif
+# if defined GNULIB_POSIXCHECK
+/* strpbrk() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it does not work with multibyte strings if the
+ locale encoding is GB18030 and one of the characters to be searched is a
+ digit. */
+# undef strpbrk
+_GL_WARN_ON_USE_CXX (strpbrk,
+ const char *, char *, (const char *, const char *),
+ "strpbrk cannot work correctly on character strings "
+ "in multibyte locales - "
+ "use mbspbrk if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strpbrk
+# if HAVE_RAW_DECL_STRPBRK
+_GL_WARN_ON_USE_CXX (strpbrk,
+ const char *, char *, (const char *, const char *),
+ "strpbrk is unportable - "
+ "use gnulib module strpbrk for portability");
+# endif
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strspn() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it cannot work with multibyte strings. */
+# undef strspn
+/* Assume strspn is always declared. */
+_GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
+ "in multibyte locales - "
+ "use mbsspn if you care about internationalization");
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strrchr() does not work with multibyte strings if the locale encoding is
+ GB18030 and the character to be searched is a digit. */
+# undef strrchr
+/* Assume strrchr is always declared. */
+_GL_WARN_ON_USE_CXX (strrchr,
+ const char *, char *, (const char *, int),
+ "strrchr cannot work correctly on character strings "
+ "in some multibyte locales - "
+ "use mbsrchr if you care about internationalization");
+#endif
+
+/* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
+ If one is found, overwrite it with a NUL, and advance *STRINGP
+ to point to the next char after it. Otherwise, set *STRINGP to NULL.
+ If *STRINGP was already NULL, nothing happens.
+ Return the old value of *STRINGP.
+
+ This is a variant of strtok() that is multithread-safe and supports
+ empty fields.
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+ Caveat: It doesn't work with multibyte strings unless all of the delimiter
+ characters are ASCII characters < 0x30.
+
+ See also strtok_r(). */
+#if @GNULIB_STRSEP@
+# if ! @HAVE_STRSEP@
+_GL_FUNCDECL_SYS (strsep, char *,
+ (char **restrict __stringp, char const *restrict __delim)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (strsep, char *,
+ (char **restrict __stringp, char const *restrict __delim));
+_GL_CXXALIASWARN (strsep);
+# if defined GNULIB_POSIXCHECK
+# undef strsep
+_GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
+ "in multibyte locales - "
+ "use mbssep if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strsep
+# if HAVE_RAW_DECL_STRSEP
+_GL_WARN_ON_USE (strsep, "strsep is unportable - "
+ "use gnulib module strsep for portability");
+# endif
+#endif
+
+#if @GNULIB_STRSTR@
+# if @REPLACE_STRSTR@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define strstr rpl_strstr
+# endif
+_GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
+# else
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C++" { const char * strstr (const char *, const char *); }
+ extern "C++" { char * strstr (char *, const char *); } */
+_GL_CXXALIAS_SYS_CAST2 (strstr,
+ char *, (const char *haystack, const char *needle),
+ const char *, (const char *haystack, const char *needle));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
+_GL_CXXALIASWARN1 (strstr, const char *,
+ (const char *haystack, const char *needle));
+# elif __GLIBC__ >= 2
+_GL_CXXALIASWARN (strstr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strstr() does not work with multibyte strings if the locale encoding is
+ different from UTF-8:
+ POSIX says that it operates on "strings", and "string" in POSIX is defined
+ as a sequence of bytes, not of characters. */
+# undef strstr
+/* Assume strstr is always declared. */
+_GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
+ "work correctly on character strings in most "
+ "multibyte locales - "
+ "use mbsstr if you care about internationalization, "
+ "or use strstr if you care about speed");
+#endif
+
+/* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
+ comparison. */
+#if @GNULIB_STRCASESTR@
+# if @REPLACE_STRCASESTR@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define strcasestr rpl_strcasestr
+# endif
+_GL_FUNCDECL_RPL (strcasestr, char *,
+ (const char *haystack, const char *needle)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strcasestr, char *,
+ (const char *haystack, const char *needle));
+# else
+# if ! @HAVE_STRCASESTR@
+_GL_FUNCDECL_SYS (strcasestr, char *,
+ (const char *haystack, const char *needle)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+ /* On some systems, this function is defined as an overloaded function:
+ extern "C++" { const char * strcasestr (const char *, const char *); }
+ extern "C++" { char * strcasestr (char *, const char *); } */
+_GL_CXXALIAS_SYS_CAST2 (strcasestr,
+ char *, (const char *haystack, const char *needle),
+ const char *, (const char *haystack, const char *needle));
+# endif
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
+ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+_GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
+_GL_CXXALIASWARN1 (strcasestr, const char *,
+ (const char *haystack, const char *needle));
+# else
+_GL_CXXALIASWARN (strcasestr);
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strcasestr() does not work with multibyte strings:
+ It is a glibc extension, and glibc implements it only for unibyte
+ locales. */
+# undef strcasestr
+# if HAVE_RAW_DECL_STRCASESTR
+_GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
+ "strings in multibyte locales - "
+ "use mbscasestr if you care about "
+ "internationalization, or use c-strcasestr if you want "
+ "a locale independent function");
+# endif
+#endif
+
+/* Parse S into tokens separated by characters in DELIM.
+ If S is NULL, the saved pointer in SAVE_PTR is used as
+ the next starting point. For example:
+ char s[] = "-abc-=-def";
+ char *sp;
+ x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def"
+ x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL
+ x = strtok_r(NULL, "=", &sp); // x = NULL
+ // s = "abc\0-def\0"
+
+ This is a variant of strtok() that is multithread-safe.
+
+ For the POSIX documentation for this function, see:
+ https://pubs.opengroup.org/onlinepubs/9699919799/functions/strtok.html
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+ Caveat: It doesn't work with multibyte strings unless all of the delimiter
+ characters are ASCII characters < 0x30.
+
+ See also strsep(). */
+#if @GNULIB_STRTOK_R@
+# if @REPLACE_STRTOK_R@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strtok_r
+# define strtok_r rpl_strtok_r
+# endif
+_GL_FUNCDECL_RPL (strtok_r, char *,
+ (char *restrict s, char const *restrict delim,
+ char **restrict save_ptr)
+ _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (strtok_r, char *,
+ (char *restrict s, char const *restrict delim,
+ char **restrict save_ptr));
+# else
+# if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
+# undef strtok_r
+# endif
+# if ! @HAVE_DECL_STRTOK_R@
+_GL_FUNCDECL_SYS (strtok_r, char *,
+ (char *restrict s, char const *restrict delim,
+ char **restrict save_ptr)
+ _GL_ARG_NONNULL ((2, 3)));
+# endif
+_GL_CXXALIAS_SYS (strtok_r, char *,
+ (char *restrict s, char const *restrict delim,
+ char **restrict save_ptr));
+# endif
+_GL_CXXALIASWARN (strtok_r);
+# if defined GNULIB_POSIXCHECK
+_GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
+ "strings in multibyte locales - "
+ "use mbstok_r if you care about internationalization");
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strtok_r
+# if HAVE_RAW_DECL_STRTOK_R
+_GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
+ "use gnulib module strtok_r for portability");
+# endif
+#endif
+
+
+/* The following functions are not specified by POSIX. They are gnulib
+ extensions. */
+
+#if @GNULIB_MBSLEN@
+/* Return the number of multibyte characters in the character string STRING.
+ This considers multibyte characters, unlike strlen, which counts bytes. */
+# ifdef __MirBSD__ /* MirBSD defines mbslen as a macro. Override it. */
+# undef mbslen
+# endif
+# if @HAVE_MBSLEN@ /* AIX, OSF/1, MirBSD define mbslen already in libc. */
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define mbslen rpl_mbslen
+# endif
+_GL_FUNCDECL_RPL (mbslen, size_t, (const char *string)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
+# else
+_GL_FUNCDECL_SYS (mbslen, size_t, (const char *string)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
+# endif
+_GL_CXXALIASWARN (mbslen);
+#endif
+
+#if @GNULIB_MBSNLEN@
+/* Return the number of multibyte characters in the character string starting
+ at STRING and ending at STRING + LEN. */
+_GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1));
+#endif
+
+#if @GNULIB_MBSCHR@
+/* Locate the first single-byte character C in the character string STRING,
+ and return a pointer to it. Return NULL if C is not found in STRING.
+ Unlike strchr(), this function works correctly in multibyte locales with
+ encodings such as GB18030. */
+# if defined __hpux
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define mbschr rpl_mbschr /* avoid collision with HP-UX function */
+# endif
+_GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
+# else
+_GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
+# endif
+_GL_CXXALIASWARN (mbschr);
+#endif
+
+#if @GNULIB_MBSRCHR@
+/* Locate the last single-byte character C in the character string STRING,
+ and return a pointer to it. Return NULL if C is not found in STRING.
+ Unlike strrchr(), this function works correctly in multibyte locales with
+ encodings such as GB18030. */
+# if defined __hpux || defined __INTERIX
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define mbsrchr rpl_mbsrchr /* avoid collision with system function */
+# endif
+_GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
+# else
+_GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
+# endif
+_GL_CXXALIASWARN (mbsrchr);
+#endif
+
+#if @GNULIB_MBSSTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+ string HAYSTACK. Return NULL if NEEDLE is not found in HAYSTACK.
+ Unlike strstr(), this function works correctly in multibyte locales with
+ encodings different from UTF-8. */
+_GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCASECMP@
+/* Compare the character strings S1 and S2, ignoring case, returning less than,
+ equal to or greater than zero if S1 is lexicographically less than, equal to
+ or greater than S2.
+ Note: This function may, in multibyte locales, return 0 for strings of
+ different lengths!
+ Unlike strcasecmp(), this function works correctly in multibyte locales. */
+_GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSNCASECMP@
+/* Compare the initial segment of the character string S1 consisting of at most
+ N characters with the initial segment of the character string S2 consisting
+ of at most N characters, ignoring case, returning less than, equal to or
+ greater than zero if the initial segment of S1 is lexicographically less
+ than, equal to or greater than the initial segment of S2.
+ Note: This function may, in multibyte locales, return 0 for initial segments
+ of different lengths!
+ Unlike strncasecmp(), this function works correctly in multibyte locales.
+ But beware that N is not a byte count but a character count! */
+_GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSPCASECMP@
+/* Compare the initial segment of the character string STRING consisting of
+ at most mbslen (PREFIX) characters with the character string PREFIX,
+ ignoring case. If the two match, return a pointer to the first byte
+ after this prefix in STRING. Otherwise, return NULL.
+ Note: This function may, in multibyte locales, return non-NULL if STRING
+ is of smaller length than PREFIX!
+ Unlike strncasecmp(), this function works correctly in multibyte
+ locales. */
+_GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCASESTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+ string HAYSTACK, using case-insensitive comparison.
+ Note: This function may, in multibyte locales, return success even if
+ strlen (haystack) < strlen (needle) !
+ Unlike strcasestr(), this function works correctly in multibyte locales. */
+_GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSCSPN@
+/* Find the first occurrence in the character string STRING of any character
+ in the character string ACCEPT. Return the number of bytes from the
+ beginning of the string to this occurrence, or to the end of the string
+ if none exists.
+ Unlike strcspn(), this function works correctly in multibyte locales. */
+_GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSPBRK@
+/* Find the first occurrence in the character string STRING of any character
+ in the character string ACCEPT. Return the pointer to it, or NULL if none
+ exists.
+ Unlike strpbrk(), this function works correctly in multibyte locales. */
+# if defined __hpux
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
+# endif
+_GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
+# else
+_GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
+# endif
+_GL_CXXALIASWARN (mbspbrk);
+#endif
+
+#if @GNULIB_MBSSPN@
+/* Find the first occurrence in the character string STRING of any character
+ not in the character string REJECT. Return the number of bytes from the
+ beginning of the string to this occurrence, or to the end of the string
+ if none exists.
+ Unlike strspn(), this function works correctly in multibyte locales. */
+_GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSSEP@
+/* Search the next delimiter (multibyte character listed in the character
+ string DELIM) starting at the character string *STRINGP.
+ If one is found, overwrite it with a NUL, and advance *STRINGP to point
+ to the next multibyte character after it. Otherwise, set *STRINGP to NULL.
+ If *STRINGP was already NULL, nothing happens.
+ Return the old value of *STRINGP.
+
+ This is a variant of mbstok_r() that supports empty fields.
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+
+ See also mbstok_r(). */
+_GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
+ _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_MBSTOK_R@
+/* Parse the character string STRING into tokens separated by characters in
+ the character string DELIM.
+ If STRING is NULL, the saved pointer in SAVE_PTR is used as
+ the next starting point. For example:
+ char s[] = "-abc-=-def";
+ char *sp;
+ x = mbstok_r(s, "-", &sp); // x = "abc", sp = "=-def"
+ x = mbstok_r(NULL, "-=", &sp); // x = "def", sp = NULL
+ x = mbstok_r(NULL, "=", &sp); // x = NULL
+ // s = "abc\0-def\0"
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+
+ See also mbssep(). */
+_GL_EXTERN_C char * mbstok_r (char *restrict string, const char *delim,
+ char **save_ptr)
+ _GL_ARG_NONNULL ((2, 3));
+#endif
+
+/* Map any int, typically from errno, into an error message. */
+#if @GNULIB_STRERROR@
+# if @REPLACE_STRERROR@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strerror
+# define strerror rpl_strerror
+# endif
+_GL_FUNCDECL_RPL (strerror, char *, (int));
+_GL_CXXALIAS_RPL (strerror, char *, (int));
+# else
+_GL_CXXALIAS_SYS (strerror, char *, (int));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strerror);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror
+/* Assume strerror is always declared. */
+_GL_WARN_ON_USE (strerror, "strerror is unportable - "
+ "use gnulib module strerror to guarantee non-NULL result");
+#endif
+
+/* Map any int, typically from errno, into an error message. Multithread-safe.
+ Uses the POSIX declaration, not the glibc declaration. */
+#if @GNULIB_STRERROR_R@
+# if @REPLACE_STRERROR_R@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strerror_r
+# define strerror_r rpl_strerror_r
+# endif
+_GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
+ _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# else
+# if !@HAVE_DECL_STRERROR_R@
+_GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
+ _GL_ARG_NONNULL ((2)));
+# endif
+_GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# endif
+# if @HAVE_DECL_STRERROR_R@
+_GL_CXXALIASWARN (strerror_r);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror_r
+# if HAVE_RAW_DECL_STRERROR_R
+_GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
+ "use gnulib module strerror_r-posix for portability");
+# endif
+#endif
+
+/* Return the name of the system error code ERRNUM. */
+#if @GNULIB_STRERRORNAME_NP@
+# if @REPLACE_STRERRORNAME_NP@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strerrorname_np
+# define strerrorname_np rpl_strerrorname_np
+# endif
+_GL_FUNCDECL_RPL (strerrorname_np, const char *, (int errnum));
+_GL_CXXALIAS_RPL (strerrorname_np, const char *, (int errnum));
+# else
+# if !@HAVE_STRERRORNAME_NP@
+_GL_FUNCDECL_SYS (strerrorname_np, const char *, (int errnum));
+# endif
+_GL_CXXALIAS_SYS (strerrorname_np, const char *, (int errnum));
+# endif
+_GL_CXXALIASWARN (strerrorname_np);
+#elif defined GNULIB_POSIXCHECK
+# undef strerrorname_np
+# if HAVE_RAW_DECL_STRERRORNAME_NP
+_GL_WARN_ON_USE (strerrorname_np, "strerrorname_np is unportable - "
+ "use gnulib module strerrorname_np for portability");
+# endif
+#endif
+
+/* Return an abbreviation string for the signal number SIG. */
+#if @GNULIB_SIGABBREV_NP@
+# if ! @HAVE_SIGABBREV_NP@
+_GL_FUNCDECL_SYS (sigabbrev_np, const char *, (int sig));
+# endif
+_GL_CXXALIAS_SYS (sigabbrev_np, const char *, (int sig));
+_GL_CXXALIASWARN (sigabbrev_np);
+#elif defined GNULIB_POSIXCHECK
+# undef sigabbrev_np
+# if HAVE_RAW_DECL_SIGABBREV_NP
+_GL_WARN_ON_USE (sigabbrev_np, "sigabbrev_np is unportable - "
+ "use gnulib module sigabbrev_np for portability");
+# endif
+#endif
+
+/* Return an English description string for the signal number SIG. */
+#if @GNULIB_SIGDESCR_NP@
+# if ! @HAVE_SIGDESCR_NP@
+_GL_FUNCDECL_SYS (sigdescr_np, const char *, (int sig));
+# endif
+_GL_CXXALIAS_SYS (sigdescr_np, const char *, (int sig));
+_GL_CXXALIASWARN (sigdescr_np);
+#elif defined GNULIB_POSIXCHECK
+# undef sigdescr_np
+# if HAVE_RAW_DECL_SIGDESCR_NP
+_GL_WARN_ON_USE (sigdescr_np, "sigdescr_np is unportable - "
+ "use gnulib module sigdescr_np for portability");
+# endif
+#endif
+
+#if @GNULIB_STRSIGNAL@
+# if @REPLACE_STRSIGNAL@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define strsignal rpl_strsignal
+# endif
+_GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
+_GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
+# else
+# if ! @HAVE_DECL_STRSIGNAL@
+_GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
+# endif
+/* Need to cast, because on Cygwin 1.5.x systems, the return type is
+ 'const char *'. */
+_GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
+# endif
+_GL_CXXALIASWARN (strsignal);
+#elif defined GNULIB_POSIXCHECK
+# undef strsignal
+# if HAVE_RAW_DECL_STRSIGNAL
+_GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
+ "use gnulib module strsignal for portability");
+# endif
+#endif
+
+#if @GNULIB_STRVERSCMP@
+# if !@HAVE_STRVERSCMP@
+_GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
+ _GL_ATTRIBUTE_PURE
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
+_GL_CXXALIASWARN (strverscmp);
+#elif defined GNULIB_POSIXCHECK
+# undef strverscmp
+# if HAVE_RAW_DECL_STRVERSCMP
+_GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
+ "use gnulib module strverscmp for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_STRING_H */
+#endif /* _@GUARD_PREFIX@_STRING_H */
+#endif