#ifndef	_CTYPE_H#define	_CTYPE_H #ifdef __cplusplusextern "C" {#endif //#include <features.h> int   isalnum(int);int   isalpha(int);int   isblank(int);int   iscntrl(int);int   isdigit(int);int   isgraph(int);int   islower(int);int   isprint(int);int   ispunct(int);int   isspace(int);int   isupper(int);int   isxdigit(int);int   tolower(int);int   toupper(int); #ifndef __cplusplusstatic __inline int __isspace(int _c){	return _c == ' ' || (unsigned)_c-'\t' < 5;} #define isalpha(a) ( (((unsigned)(a)|32)-'a') < 26)#define isdigit(a) ( ((unsigned)(a)-'0') < 10)#define islower(a) ( ((unsigned)(a)-'a') < 26)#define isupper(a) ( ((unsigned)(a)-'A') < 26)#define isprint(a) ( ((unsigned)(a)-0x20) < 0x5f)#define isgraph(a) ( ((unsigned)(a)-0x21) < 0x5e)#define isspace(c) ((c)==' ' || (c)=='\t' || (c)=='\n')#endif #ifdef _PLAN9_SOURCE#define tolower(a) ((a)|0x20)#define toupper(a) ((a)&0x5f)#define isalnum(a) (isalpha((a)) || isdigit((a)))#endif /* prevent _XOPEN_SOURCE (default in features.h) triggering this conditional compile */#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \ || /* defined(_XOPEN_SOURCE) ||*/ defined(_GNU_SOURCE) \ || defined(_BSD_SOURCE) #define __NEED_locale_t#include <bits/alltypes.h> int   isalnum_l(int, locale_t);int   isalpha_l(int, locale_t);int   isblank_l(int, locale_t);int   iscntrl_l(int, locale_t);int   isdigit_l(int, locale_t);int   isgraph_l(int, locale_t);int   islower_l(int, locale_t);int   isprint_l(int, locale_t);int   ispunct_l(int, locale_t);int   isspace_l(int, locale_t);int   isupper_l(int, locale_t);int   isxdigit_l(int, locale_t);int   tolower_l(int, locale_t);int   toupper_l(int, locale_t); int   isascii(int);int   toascii(int);#define _tolower(a) ((a)|0x20)#define _toupper(a) ((a)&0x5f)#define isascii(a) (0 ? isascii(a) : (unsigned)(a) < 128) #endif #ifdef __cplusplus}#endif #endif