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+/* Copyright (C) 1991-2024 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
+   <https://www.gnu.org/licenses/>.  */
+
+/*
+ *	ISO C99 Standard 7.4: Character handling	<ctype.h>
+ */
+
+#ifndef	_CTYPE_H
+#define	_CTYPE_H	1
+
+#include <features.h>
+#include <bits/types.h>
+
+__BEGIN_DECLS
+
+#ifndef _ISbit
+/* These are all the characteristics of characters.
+   If there get to be more than 16 distinct characteristics,
+   many things must be changed that use `unsigned short int's.
+
+   The characteristics are stored always in network byte order (big
+   endian).  We define the bit value interpretations here dependent on the
+   machine's byte order.  */
+
+# include <bits/endian.h>
+# if __BYTE_ORDER == __BIG_ENDIAN
+#  define _ISbit(bit)	(1 << (bit))
+# else /* __BYTE_ORDER == __LITTLE_ENDIAN */
+#  define _ISbit(bit)	((bit) < 8 ? ((1 << (bit)) << 8) : ((1 << (bit)) >> 8))
+# endif
+
+enum
+{
+  _ISupper = _ISbit (0),	/* UPPERCASE.  */
+  _ISlower = _ISbit (1),	/* lowercase.  */
+  _ISalpha = _ISbit (2),	/* Alphabetic.  */
+  _ISdigit = _ISbit (3),	/* Numeric.  */
+  _ISxdigit = _ISbit (4),	/* Hexadecimal numeric.  */
+  _ISspace = _ISbit (5),	/* Whitespace.  */
+  _ISprint = _ISbit (6),	/* Printing.  */
+  _ISgraph = _ISbit (7),	/* Graphical.  */
+  _ISblank = _ISbit (8),	/* Blank (usually SPC and TAB).  */
+  _IScntrl = _ISbit (9),	/* Control character.  */
+  _ISpunct = _ISbit (10),	/* Punctuation.  */
+  _ISalnum = _ISbit (11)	/* Alphanumeric.  */
+};
+#endif /* ! _ISbit  */
+
+/* These are defined in ctype-info.c.
+   The declarations here must match those in localeinfo.h.
+
+   In the thread-specific locale model (see `uselocale' in <locale.h>)
+   we cannot use global variables for these as was done in the past.
+   Instead, the following accessor functions return the address of
+   each variable, which is local to the current thread if multithreaded.
+
+   These point into arrays of 384, so they can be indexed by any `unsigned
+   char' value [0,255]; by EOF (-1); or by any `signed char' value
+   [-128,-1).  ISO C requires that the ctype functions work for `unsigned
+   char' values and for EOF; we also support negative `signed char' values
+   for broken old programs.  The case conversion arrays are of `int's
+   rather than `unsigned char's because tolower (EOF) must be EOF, which
+   doesn't fit into an `unsigned char'.  But today more important is that
+   the arrays are also used for multi-byte character sets.  */
+extern const unsigned short int **__ctype_b_loc (void)
+     __THROW __attribute__ ((__const__));
+extern const __int32_t **__ctype_tolower_loc (void)
+     __THROW __attribute__ ((__const__));
+extern const __int32_t **__ctype_toupper_loc (void)
+     __THROW __attribute__ ((__const__));
+
+
+#ifndef __cplusplus
+# define __isctype(c, type) \
+  ((*__ctype_b_loc ())[(int) (c)] & (unsigned short int) type)
+#elif defined __USE_EXTERN_INLINES
+# define __isctype_f(type) \
+  __extern_inline int							      \
+  is##type (int __c) __THROW						      \
+  {									      \
+    return (*__ctype_b_loc ())[(int) (__c)] & (unsigned short int) _IS##type; \
+  }
+#endif
+
+#define	__isascii(c)	(((c) & ~0x7f) == 0)	/* If C is a 7 bit value.  */
+#define	__toascii(c)	((c) & 0x7f)		/* Mask off high bits.  */
+
+#define	__exctype(name)	extern int name (int) __THROW
+
+/* The following names are all functions:
+     int isCHARACTERISTIC(int c);
+   which return nonzero iff C has CHARACTERISTIC.
+   For the meaning of the characteristic names, see the `enum' above.  */
+__exctype (isalnum);
+__exctype (isalpha);
+__exctype (iscntrl);
+__exctype (isdigit);
+__exctype (islower);
+__exctype (isgraph);
+__exctype (isprint);
+__exctype (ispunct);
+__exctype (isspace);
+__exctype (isupper);
+__exctype (isxdigit);
+
+
+/* Return the lowercase version of C.  */
+extern int tolower (int __c) __THROW;
+
+/* Return the uppercase version of C.  */
+extern int toupper (int __c) __THROW;
+
+
+/* ISO C99 introduced one new function.  */
+#ifdef	__USE_ISOC99
+__exctype (isblank);
+#endif
+
+#ifdef __USE_GNU
+/* Test C for a set of character classes according to MASK.  */
+extern int isctype (int __c, int __mask) __THROW;
+#endif
+
+#if defined __USE_MISC || defined __USE_XOPEN
+
+/* Return nonzero iff C is in the ASCII set
+   (i.e., is no more than 7 bits wide).  */
+extern int isascii (int __c) __THROW;
+
+/* Return the part of C that is in the ASCII set
+   (i.e., the low-order 7 bits of C).  */
+extern int toascii (int __c) __THROW;
+
+/* These are the same as `toupper' and `tolower' except that they do not
+   check the argument for being in the range of a `char'.  */
+__exctype (_toupper);
+__exctype (_tolower);
+#endif /* Use X/Open or use misc.  */
+
+/* This code is needed for the optimized mapping functions.  */
+#define __tobody(c, f, a, args) \
+  (__extension__							      \
+   ({ int __res;							      \
+      if (sizeof (c) > 1)						      \
+	{								      \
+	  if (__builtin_constant_p (c))					      \
+	    {								      \
+	      int __c = (c);						      \
+	      __res = __c < -128 || __c > 255 ? __c : (a)[__c];		      \
+	    }								      \
+	  else								      \
+	    __res = f args;						      \
+	}								      \
+      else								      \
+	__res = (a)[(int) (c)];						      \
+      __res; }))
+
+#if !defined __NO_CTYPE
+# ifdef __isctype_f
+__isctype_f (alnum)
+__isctype_f (alpha)
+__isctype_f (cntrl)
+__isctype_f (digit)
+__isctype_f (lower)
+__isctype_f (graph)
+__isctype_f (print)
+__isctype_f (punct)
+__isctype_f (space)
+__isctype_f (upper)
+__isctype_f (xdigit)
+#  ifdef __USE_ISOC99
+__isctype_f (blank)
+#  endif
+# elif defined __isctype
+# define isalnum(c)	__isctype((c), _ISalnum)
+# define isalpha(c)	__isctype((c), _ISalpha)
+# define iscntrl(c)	__isctype((c), _IScntrl)
+# define isdigit(c)	__isctype((c), _ISdigit)
+# define islower(c)	__isctype((c), _ISlower)
+# define isgraph(c)	__isctype((c), _ISgraph)
+# define isprint(c)	__isctype((c), _ISprint)
+# define ispunct(c)	__isctype((c), _ISpunct)
+# define isspace(c)	__isctype((c), _ISspace)
+# define isupper(c)	__isctype((c), _ISupper)
+# define isxdigit(c)	__isctype((c), _ISxdigit)
+#  ifdef __USE_ISOC99
+#   define isblank(c)	__isctype((c), _ISblank)
+#  endif
+# endif
+
+# ifdef __USE_EXTERN_INLINES
+__extern_inline int
+__NTH (tolower (int __c))
+{
+  return __c >= -128 && __c < 256 ? (*__ctype_tolower_loc ())[__c] : __c;
+}
+
+__extern_inline int
+__NTH (toupper (int __c))
+{
+  return __c >= -128 && __c < 256 ? (*__ctype_toupper_loc ())[__c] : __c;
+}
+# endif
+
+# if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
+#  define tolower(c)	__tobody (c, tolower, *__ctype_tolower_loc (), (c))
+#  define toupper(c)	__tobody (c, toupper, *__ctype_toupper_loc (), (c))
+# endif /* Optimizing gcc */
+
+# if defined __USE_MISC || defined __USE_XOPEN
+#  define isascii(c)	__isascii (c)
+#  define toascii(c)	__toascii (c)
+
+#  define _tolower(c)	((int) (*__ctype_tolower_loc ())[(int) (c)])
+#  define _toupper(c)	((int) (*__ctype_toupper_loc ())[(int) (c)])
+# endif
+
+#endif /* Not __NO_CTYPE.  */
+
+
+#ifdef __USE_XOPEN2K8
+/* POSIX.1-2008 extended locale interface (see locale.h).  */
+# include <bits/types/locale_t.h>
+
+/* These definitions are similar to the ones above but all functions
+   take as an argument a handle for the locale which shall be used.  */
+#  define __isctype_l(c, type, locale) \
+  ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)
+
+# define __exctype_l(name) 						      \
+  extern int name (int, locale_t) __THROW
+
+/* The following names are all functions:
+     int isCHARACTERISTIC(int c, locale_t *locale);
+   which return nonzero iff C has CHARACTERISTIC.
+   For the meaning of the characteristic names, see the `enum' above.  */
+__exctype_l (isalnum_l);
+__exctype_l (isalpha_l);
+__exctype_l (iscntrl_l);
+__exctype_l (isdigit_l);
+__exctype_l (islower_l);
+__exctype_l (isgraph_l);
+__exctype_l (isprint_l);
+__exctype_l (ispunct_l);
+__exctype_l (isspace_l);
+__exctype_l (isupper_l);
+__exctype_l (isxdigit_l);
+
+__exctype_l (isblank_l);
+
+
+/* Return the lowercase version of C in locale L.  */
+extern int __tolower_l (int __c, locale_t __l) __THROW;
+extern int tolower_l (int __c, locale_t __l) __THROW;
+
+/* Return the uppercase version of C.  */
+extern int __toupper_l (int __c, locale_t __l) __THROW;
+extern int toupper_l (int __c, locale_t __l) __THROW;
+
+# if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
+#  define __tolower_l(c, locale) \
+  __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale))
+#  define __toupper_l(c, locale) \
+  __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale))
+#  define tolower_l(c, locale)	__tolower_l ((c), (locale))
+#  define toupper_l(c, locale)	__toupper_l ((c), (locale))
+# endif	/* Optimizing gcc */
+
+
+# ifndef __NO_CTYPE
+#  define __isalnum_l(c,l)	__isctype_l((c), _ISalnum, (l))
+#  define __isalpha_l(c,l)	__isctype_l((c), _ISalpha, (l))
+#  define __iscntrl_l(c,l)	__isctype_l((c), _IScntrl, (l))
+#  define __isdigit_l(c,l)	__isctype_l((c), _ISdigit, (l))
+#  define __islower_l(c,l)	__isctype_l((c), _ISlower, (l))
+#  define __isgraph_l(c,l)	__isctype_l((c), _ISgraph, (l))
+#  define __isprint_l(c,l)	__isctype_l((c), _ISprint, (l))
+#  define __ispunct_l(c,l)	__isctype_l((c), _ISpunct, (l))
+#  define __isspace_l(c,l)	__isctype_l((c), _ISspace, (l))
+#  define __isupper_l(c,l)	__isctype_l((c), _ISupper, (l))
+#  define __isxdigit_l(c,l)	__isctype_l((c), _ISxdigit, (l))
+
+#  define __isblank_l(c,l)	__isctype_l((c), _ISblank, (l))
+
+#  ifdef __USE_MISC
+#   define __isascii_l(c,l)	((l), __isascii (c))
+#   define __toascii_l(c,l)	((l), __toascii (c))
+#  endif
+
+#  define isalnum_l(c,l)	__isalnum_l ((c), (l))
+#  define isalpha_l(c,l)	__isalpha_l ((c), (l))
+#  define iscntrl_l(c,l)	__iscntrl_l ((c), (l))
+#  define isdigit_l(c,l)	__isdigit_l ((c), (l))
+#  define islower_l(c,l)	__islower_l ((c), (l))
+#  define isgraph_l(c,l)	__isgraph_l ((c), (l))
+#  define isprint_l(c,l)	__isprint_l ((c), (l))
+#  define ispunct_l(c,l)	__ispunct_l ((c), (l))
+#  define isspace_l(c,l)	__isspace_l ((c), (l))
+#  define isupper_l(c,l)	__isupper_l ((c), (l))
+#  define isxdigit_l(c,l)	__isxdigit_l ((c), (l))
+
+#  define isblank_l(c,l)	__isblank_l ((c), (l))
+
+#  ifdef __USE_MISC
+#   define isascii_l(c,l)	__isascii_l ((c), (l))
+#   define toascii_l(c,l)	__toascii_l ((c), (l))
+#  endif
+
+# endif /* Not __NO_CTYPE.  */
+
+#endif /* Use POSIX 2008.  */
+
+__END_DECLS
+
+#endif /* ctype.h  */