ref: 3e2b9fc5817172876d54d82e4ddc7df78b051212
dir: /lib/c/include/ctype.h/
#ifndef _CTYPE_H #define _CTYPE_H extern int isalnum(int c); extern int isalpha(int c); extern int islower(int c); extern int isupper(int c); extern int isdigit(int c); extern int isxdigit(int c); extern int iscntrl(int c); extern int isgraph(int c); extern int isspace(int c); extern int isblank(int c); extern int isprint(int c); extern int ispunct(int c); extern int tolower(int c); extern int toupper(int c); #ifdef __USE_MACROS #define _U 0x01 /* upper */ #define _L 0x02 /* lower */ #define _D 0x04 /* digit */ #define _C 0x08 /* cntrl */ #define _P 0x10 /* punct */ #define _S 0x20 /* white space (space/lf/tab) */ #define _X 0x40 /* hex char */ #define _SP 0x80 /* hard space (0x20) */ extern unsigned char __ctype[]; extern int __ctmp; #define isalnum(c) ((__ctype+1)[c] & (_U|_L|_D)) #define isalpha(c) ((__ctype+1)[c] & (_U|_L)) #define iscntrl(c) ((__ctype+1)[c] & (_C)) #define isdigit(c) ((__ctype+1)[c] & (_D)) #define isgraph(c) ((__ctype+1)[c] & (_P|_U|_L|_D)) #define islower(c) ((__ctype+1)[c] & (_L)) #define isprint(c) ((__ctype+1)[c] & (_P|_U|_L|_D|_SP)) #define ispunct(c) ((__ctype+1)[c] & (_P)) #define isspace(c) ((__ctype+1)[c] & (_S)) #define isupper(c) ((__ctype+1)[c] & (_U)) #define isxdigit(c) ((__ctype+1)[c] & (_D|_X)) #define tolower(c) ((__ctmp=c, isupper(__ctmp) ? __ctmp | 0x20 : __ctmp)) #define toupper(c) ((__ctmp=c, islower(__ctmp) ? __ctmp & ~0x20 : __ctmp)) #define isascii(c) ((unsigned)(c)<=0x7f) #endif #endif