1 #ifndef _LINUX_CTYPE_H 2 #define _LINUX_CTYPE_H 3 4 /* 5 * NOTE! This ctype does not handle EOF like the standard C 6 * library is required to. 7 */ 8 9 #define _U 0x01 /* upper */ 10 #define _L 0x02 /* lower */ 11 #define _D 0x04 /* digit */ 12 #define _C 0x08 /* cntrl */ 13 #define _P 0x10 /* punct */ 14 #define _S 0x20 /* white space (space/lf/tab) */ 15 #define _X 0x40 /* hex digit */ 16 #define _SP 0x80 /* hard space (0x20) */ 17 18 extern unsigned char _ctype[]; 19 20 #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) 21 22 #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) 23 #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) 24 #define iscntrl(c) ((__ismask(c)&(_C)) != 0) 25 #define isdigit(c) ((__ismask(c)&(_D)) != 0) 26 #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) 27 #define islower(c) ((__ismask(c)&(_L)) != 0) 28 #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) 29 #define ispunct(c) ((__ismask(c)&(_P)) != 0) 30 #define isspace(c) ((__ismask(c)&(_S)) != 0) 31 #define isupper(c) ((__ismask(c)&(_U)) != 0) 32 #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) 33 34 #define isascii(c) (((unsigned char)(c))<=0x7f) 35 #define toascii(c) (((unsigned char)(c))&0x7f) 36 37 static inline unsigned char __tolower(unsigned char c) 38 { 39 if (isupper(c)) 40 c -= 'A'-'a'; 41 return c; 42 } 43 44 static inline unsigned char __toupper(unsigned char c) 45 { 46 if (islower(c)) 47 c -= 'a'-'A'; 48 return c; 49 } 50 51 #define tolower(c) __tolower(c) 52 #define toupper(c) __toupper(c) 53 54 #endif 55