Hallo, dies ist ein Test.

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/*
 * Copyright (c) 1989, 2020, Oracle and/or its affiliates.
 */

#ifndef _STRING_H
#define	_STRING_H

#include <sys/feature_tests.h>
#include <iso/string_iso.h>
#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
#include <sys/types.h>
#endif

/*
 * Allow global visibility for symbols defined in
 * C++ "std" namespace in <iso/string_iso.h>.
 */
#if __cplusplus >= 199711L
using std::size_t;
using std::memchr;
using std::memcmp;
using std::memcpy;
using std::memmove;
using std::memset;
using std::strcat;
using std::strchr;
using std::strcmp;
using std::strcoll;
using std::strcpy;
using std::strcspn;
using std::strerror;
using std::strlen;
using std::strncat;
using std::strncmp;
using std::strncpy;
using std::strpbrk;
using std::strrchr;
using std::strspn;
using std::strstr;
using std::strtok;
using std::strxfrm;

#if defined(_STDC_C11_BCI)
using std::memcpy_s;
using std::memmove_s;
using std::memset_s;
using std::strcpy_s;
using std::strncpy_s;
using std::strcat_s;
using std::strncat_s;
using std::strtok_s;
using std::strerror_s;
using std::strerrorlen_s;
using std::strnlen_s;
#endif  /* (_STDC_C11_BCI) */

#endif

#ifdef	__cplusplus
extern "C" {
#endif

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	defined(_XPG7)
#ifndef _LOCALE_T
#define	_LOCALE_T
typedef struct _LC_locale_t **locale_t;
#endif /* !_LOCALE_T */
#endif	/* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) && .. */

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	defined(_XPG6)
extern int strerror_r(int, char *, size_t);
#endif

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	(_POSIX_C_SOURCE - 0 >= 199506L)
extern char *strtok_r(char *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
	char **_RESTRICT_KYWD);
#endif

#if defined(__EXTENSIONS__) || !defined(_STRICT_STDC) || \
	defined(__XOPEN_OR_POSIX)
extern void *memccpy(void *_RESTRICT_KYWD, const void *_RESTRICT_KYWD,
		int, size_t);
#endif

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	defined(_XPG7)
extern char *stpcpy(char *_RESTRICT_KYWD, const char *_RESTRICT_KYWD);
extern char *stpncpy(char *_RESTRICT_KYWD, const char *_RESTRICT_KYWD, size_t);
extern char *strndup(const char *, size_t);
extern size_t strnlen(const char *, size_t);
extern char *strsignal(int);

#endif /* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) .. */

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))

#if defined(_STRCASECMP_XPG7) && !defined(_STRCASECMP_ASCII_ONLY)

#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname strcasecmp __strcasecmp_xpg7
#pragma redefine_extname strncasecmp __strncasecmp_xpg7
#else
extern int __strcasecmp_xpg7(const char *, const char *);
extern int __strncasecmp_xpg7(const char *, const char *, size_t);
#define	strcasecmp	__strcasecmp_xpg7
#define	strncasecmp	__strncasecmp_xpg7
#endif /* __PRAGMA_REDEFINE_EXTNAME */

#endif /* defined(_STRCASECMP_XPG7) && !defined(_STRCASECMP_ASCII_ONLY) */

extern int uucopy(const void *_RESTRICT_KYWD, void *_RESTRICT_KYWD, size_t);
extern int uucopystr(const void *_RESTRICT_KYWD, void *_RESTRICT_KYWD, size_t);
extern int ffs(int);
extern int ffsl(long);
extern int ffsll(long long);
extern int fls(int);
extern int flsl(long);
extern int flsll(long long);
extern void *memmem(const void *, size_t, const void *, size_t);
extern int strcasecmp(const char *, const char *);
extern int strncasecmp(const char *, const char *, size_t);
extern char *strcasestr(const char *, const char *);
extern char *strnstr(const char *, const char *, size_t);
extern size_t strlcpy(char *, const char *, size_t);
extern size_t strlcat(char *, const char *, size_t);
extern char *strsep(char **stringp, const char *delim);
extern char *strchrnul(const char *, int);

#endif /* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) .. */

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	defined(_XPG4_2)
extern char *strdup(const char *);
#endif

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
#if defined(__GNUC__)

/*
 * gcc provides this inlining facility but Studio C does not.
 * We should use it exclusively once Studio C also provides it.
 */
extern void *__builtin_alloca(size_t);

#define	strdupa(s)							\
	(__extension__(							\
	{								\
	char *__str = (char *)(s);					\
	strcpy((char *)__builtin_alloca(strlen(__str) + 1), __str);	\
	}))

#define	strndupa(s, n)							\
	(__extension__(							\
	{								\
	char *__str = (char *)(s);					\
	size_t __len = strnlen(__str, (n));				\
	(__str = strncpy((char *)__builtin_alloca(__len + 1),		\
	    __str, __len),						\
	__str[__len] = '\0', __str);					\
	}))

#else	/* __GNUC__ */

#if (defined(unix) || defined(__unix__)) && \
	(__SUNPRO_C >= 0x550)		/* excludes c99 and */
					/* SunStudio prior to SOS8 */
/*
 * __thread not support until SOS8.
 *
 * Studio C currently can't do the gcc-style inlining,
 * so we use thread-local storage instead.
 */
extern void *__builtin_alloca(size_t);
extern __thread char *__strdupa_str;
extern __thread size_t __strdupa_len;

#define	strdupa(s)							\
	(__strdupa_str = (char *)(s), 					\
	strcpy((char *)__builtin_alloca(strlen(__strdupa_str) + 1),	\
	    __strdupa_str))

#define	strndupa(s, n)							\
	(__strdupa_str = (char *)(s),					\
	__strdupa_len = strnlen(__strdupa_str, (n)),			\
	__strdupa_str = strncpy((char *)__builtin_alloca(__strdupa_len + 1), \
	    __strdupa_str, __strdupa_len),				\
	__strdupa_str[__strdupa_len] = '\0', __strdupa_str)
#endif	/* unix */

#endif	/* __GNUC__ */
#endif	/* __EXTENSIONS__ ... */

#if defined(__EXTENSIONS__) || \
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
	defined(_XPG7)
extern int strcoll_l(const char *, const char *, locale_t);
extern char *strerror_l(int, locale_t);
extern size_t strxfrm_l(char *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
    size_t, locale_t);
#endif	/* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) .. */

#if defined(__EXTENSIONS__) ||					\
	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
extern ssize_t b32_encode(char *_RESTRICT_KYWD outbuf, size_t outbufsz,
    const void *_RESTRICT_KYWD inbuf, size_t inbufsz, const char *alpha,
    uint64_t flags);
extern ssize_t b32_decode(void *outbuf, size_t outbufsz, const char *inbuf,
    const char *alpha, uint64_t flags);
extern ssize_t b64_encode(char *_RESTRICT_KYWD outbuf, size_t outbufsz,
    const void *_RESTRICT_KYWD inbuf, size_t inbufsz, const char *alpha,
    uint64_t flags);
extern ssize_t b64_decode(void *outbuf, size_t outbufsz, const char *inbuf,
    const char *alpha, uint64_t flags);
extern const char *BASE64_URL_ALPHABET;
extern const char *BASE32_HEX_ALPHABET;

extern void explicit_bzero(void *, size_t);
extern void *explicit_memset(void *, int, size_t);

extern const char *strerrordesc_np(int);
extern const char *strerrorname_np(int);

extern int timingsafe_bcmp(const void *s1, const void *s2, size_t len);
extern int timingsafe_memcmp(const void *s1, const void *s2, size_t n);
#endif	/* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) .. */

#ifdef	__cplusplus
}
#endif

#endif	/* _STRING_H */