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 18extern const 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/* 35 * Rather than doubling the size of the _ctype lookup table to hold a 'blank' 36 * flag, just check for space or tab. 37 */ 38#define isblank(c) (c == ' ' || c == '\t') 39 40#define isascii(c) (((unsigned char)(c))<=0x7f) 41#define toascii(c) (((unsigned char)(c))&0x7f) 42 43static inline unsigned char __tolower(unsigned char c) 44{ 45 if (isupper(c)) 46 c -= 'A'-'a'; 47 return c; 48} 49 50static inline unsigned char __toupper(unsigned char c) 51{ 52 if (islower(c)) 53 c -= 'a'-'A'; 54 return c; 55} 56 57#define tolower(c) __tolower(c) 58#define toupper(c) __toupper(c) 59 60#endif 61