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/* Note: isspace() must return false for %NUL-terminator */ 31#define isspace(c) ((__ismask(c)&(_S)) != 0) 32#define isupper(c) ((__ismask(c)&(_U)) != 0) 33#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) 34 35#define isascii(c) (((unsigned char)(c))<=0x7f) 36#define toascii(c) (((unsigned char)(c))&0x7f) 37 38static inline unsigned char __tolower(unsigned char c) 39{ 40 if (isupper(c)) 41 c -= 'A'-'a'; 42 return c; 43} 44 45static inline unsigned char __toupper(unsigned char c) 46{ 47 if (islower(c)) 48 c -= 'a'-'A'; 49 return c; 50} 51 52#define tolower(c) __tolower(c) 53#define toupper(c) __toupper(c) 54 55/* 56 * Fast implementation of tolower() for internal usage. Do not use in your 57 * code. 58 */ 59static inline char _tolower(const char c) 60{ 61 return c | 0x20; 62} 63 64/* Fast check for octal digit */ 65static inline int isodigit(const char c) 66{ 67 return c >= '0' && c <= '7'; 68} 69 70#endif 71