/usr/include/newlib/ctype.h is in libnewlib-dev 2.4.0.20160527-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | #ifndef _CTYPE_H_
#define _CTYPE_H_
#include "_ansi.h"
#include <sys/cdefs.h>
_BEGIN_STD_C
int _EXFUN(isalnum, (int __c));
int _EXFUN(isalpha, (int __c));
int _EXFUN(iscntrl, (int __c));
int _EXFUN(isdigit, (int __c));
int _EXFUN(isgraph, (int __c));
int _EXFUN(islower, (int __c));
int _EXFUN(isprint, (int __c));
int _EXFUN(ispunct, (int __c));
int _EXFUN(isspace, (int __c));
int _EXFUN(isupper, (int __c));
int _EXFUN(isxdigit,(int __c));
int _EXFUN(tolower, (int __c));
int _EXFUN(toupper, (int __c));
#if __ISO_C_VISIBLE >= 1999
int _EXFUN(isblank, (int __c));
#endif
#if __MISC_VISIBLE || __XSI_VISIBLE
int _EXFUN(isascii, (int __c));
int _EXFUN(toascii, (int __c));
#define _tolower(__c) ((unsigned char)(__c) - 'A' + 'a')
#define _toupper(__c) ((unsigned char)(__c) - 'a' + 'A')
#endif
#define _U 01
#define _L 02
#define _N 04
#define _S 010
#define _P 020
#define _C 040
#define _X 0100
#define _B 0200
#ifndef _MB_CAPABLE
_CONST
#endif
extern __IMPORT char *__ctype_ptr__;
#ifndef __cplusplus
/* These macros are intentionally written in a manner that will trigger
a gcc -Wall warning if the user mistakenly passes a 'char' instead
of an int containing an 'unsigned char'. Note that the sizeof will
always be 1, which is what we want for mapping EOF to __ctype_ptr__[0];
the use of a raw index inside the sizeof triggers the gcc warning if
__c was of type char, and sizeof masks side effects of the extra __c.
Meanwhile, the real index to __ctype_ptr__+1 must be cast to int,
since isalpha(0x100000001LL) must equal isalpha(1), rather than being
an out-of-bounds reference on a 64-bit machine. */
#define __ctype_lookup(__c) ((__ctype_ptr__+sizeof(""[__c]))[(int)(__c)])
#define isalpha(__c) (__ctype_lookup(__c)&(_U|_L))
#define isupper(__c) ((__ctype_lookup(__c)&(_U|_L))==_U)
#define islower(__c) ((__ctype_lookup(__c)&(_U|_L))==_L)
#define isdigit(__c) (__ctype_lookup(__c)&_N)
#define isxdigit(__c) (__ctype_lookup(__c)&(_X|_N))
#define isspace(__c) (__ctype_lookup(__c)&_S)
#define ispunct(__c) (__ctype_lookup(__c)&_P)
#define isalnum(__c) (__ctype_lookup(__c)&(_U|_L|_N))
#define isprint(__c) (__ctype_lookup(__c)&(_P|_U|_L|_N|_B))
#define isgraph(__c) (__ctype_lookup(__c)&(_P|_U|_L|_N))
#define iscntrl(__c) (__ctype_lookup(__c)&_C)
#if defined(__GNUC__) && __ISO_C_VISIBLE >= 1999
#define isblank(__c) \
__extension__ ({ __typeof__ (__c) __x = (__c); \
(__ctype_lookup(__x)&_B) || (int) (__x) == '\t';})
#endif
/* Non-gcc versions will get the library versions, and will be
slightly slower. These macros are not NLS-aware so they are
disabled if the system supports the extended character sets. */
# if defined(__GNUC__)
# if !defined (_MB_EXTENDED_CHARSETS_ISO) && !defined (_MB_EXTENDED_CHARSETS_WINDOWS)
# define toupper(__c) \
__extension__ ({ __typeof__ (__c) __x = (__c); \
islower (__x) ? (int) __x - 'a' + 'A' : (int) __x;})
# define tolower(__c) \
__extension__ ({ __typeof__ (__c) __x = (__c); \
isupper (__x) ? (int) __x - 'A' + 'a' : (int) __x;})
# else /* _MB_EXTENDED_CHARSETS* */
/* Allow a gcc warning if the user passed 'char', but defer to the
function. */
# define toupper(__c) \
__extension__ ({ __typeof__ (__c) __x = (__c); \
(void) __ctype_ptr__[__x]; (toupper) (__x);})
# define tolower(__c) \
__extension__ ({ __typeof__ (__c) __x = (__c); \
(void) __ctype_ptr__[__x]; (tolower) (__x);})
# endif /* _MB_EXTENDED_CHARSETS* */
# endif /* __GNUC__ */
#if __MISC_VISIBLE || __XSI_VISIBLE
#define isascii(__c) ((unsigned)(__c)<=0177)
#define toascii(__c) ((__c)&0177)
#endif
#endif /* !__cplusplus */
/* For C++ backward-compatibility only. */
extern __IMPORT _CONST char _ctype_[];
_END_STD_C
#endif /* _CTYPE_H_ */
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