/* Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library 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.

   The GNU C Library 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef	_STRINGS_H

#define	_STRINGS_H	1

#include <features.h>

#define __need_size_t

#include <stddef.h>

/* Tell the caller that we provide correct C++ prototypes.  */

#if defined __cplusplus && __GNUC_PREREQ (4, 4)

# define __CORRECT_ISO_CPP_STRINGS_H_PROTO

#endif

__BEGIN_DECLS

#if defined __USE_MISC || !defined __USE_XOPEN2K8

/* Compare N bytes of S1 and S2 (same as memcmp).  */

extern int bcmp (const void *__s1, const void *__s2, size_t __n)

     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Copy N bytes of SRC to DEST (like memmove, but args reversed).  */

extern void bcopy (const void *__src, void *__dest, size_t __n)

  __THROW __nonnull ((1, 2));

/* Set N bytes of S to 0.  */

extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));

/* Find the first occurrence of C in S (same as strchr).  */

# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO

extern "C++"

{

extern char *index (char *__s, int __c)

     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));

extern const char *index (const char *__s, int __c)

     __THROW __asm ("index") __attribute_pure__ __nonnull ((1));

#  if defined __OPTIMIZE__

__extern_always_inline char *

index (char *__s, int __c) __THROW

{

  return __builtin_index (__s, __c);

}

__extern_always_inline const char *

index (const char *__s, int __c) __THROW

{

  return __builtin_index (__s, __c);

}

#  endif

}

# else

extern char *index (const char *__s, int __c)

     __THROW __attribute_pure__ __nonnull ((1));

# endif

/* Find the last occurrence of C in S (same as strrchr).  */

# ifdef __CORRECT_ISO_CPP_STRINGS_H_PROTO

extern "C++"

{

extern char *rindex (char *__s, int __c)

     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));

extern const char *rindex (const char *__s, int __c)

     __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));

#  if defined __OPTIMIZE__

__extern_always_inline char *

rindex (char *__s, int __c) __THROW

{

  return __builtin_rindex (__s, __c);

}

__extern_always_inline const char *

rindex (const char *__s, int __c) __THROW

{

  return __builtin_rindex (__s, __c);

}

#  endif

}

# else

extern char *rindex (const char *__s, int __c)

     __THROW __attribute_pure__ __nonnull ((1));

# endif

#endif

#if defined __USE_MISC || !defined __USE_XOPEN2K8 || defined __USE_XOPEN2K8XSI

/* Return the position of the first bit set in I, or 0 if none are set.

   The least-significant bit is position 1, the most-significant 32.  */

extern int ffs (int __i) __THROW __attribute_const__;

#endif

/* The following two functions are non-standard but necessary for non-32 bit

   platforms.  */

# ifdef	__USE_MISC

extern int ffsl (long int __l) __THROW __attribute_const__;

__extension__ extern int ffsll (long long int __ll)

     __THROW __attribute_const__;

# endif

/* Compare S1 and S2, ignoring case.  */

extern int strcasecmp (const char *__s1, const char *__s2)

     __THROW __attribute_pure__ __nonnull ((1, 2));

/* Compare no more than N chars of S1 and S2, ignoring case.  */

extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)

     __THROW __attribute_pure__ __nonnull ((1, 2));

#ifdef	__USE_XOPEN2K8

/* POSIX.1-2008 extended locale interface (see locale.h).  */

# include <bits/types/locale_t.h>

/* Compare S1 and S2, ignoring case, using collation rules from LOC.  */

extern int strcasecmp_l (const char *__s1, const char *__s2, locale_t __loc)

     __THROW __attribute_pure__ __nonnull ((1, 2, 3));

/* Compare no more than N chars of S1 and S2, ignoring case, using

   collation rules from LOC.  */

extern int strncasecmp_l (const char *__s1, const char *__s2,

			  size_t __n, locale_t __loc)

     __THROW __attribute_pure__ __nonnull ((1, 2, 4));

#endif

__END_DECLS

#if __GNUC_PREREQ (3,4) && __USE_FORTIFY_LEVEL > 0 \

    && defined __fortify_function

/* Functions with security checks.  */

# if defined __USE_MISC || !defined __USE_XOPEN2K8

#  include <bits/strings_fortified.h>

# endif

#endif

#endif	/* strings.h  */