1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_CTYPE_H 3 #define _LINUX_CTYPE_H 4 5 #include <linux/compiler.h> 6 7 /* 8 * NOTE! This ctype does not handle EOF like the standard C 9 * library is required to. 10 */ 11 12 #define _U 0x01 /* upper */ 13 #define _L 0x02 /* lower */ 14 #define _D 0x04 /* digit */ 15 #define _C 0x08 /* cntrl */ 16 #define _P 0x10 /* punct */ 17 #define _S 0x20 /* white space (space/lf/tab) */ 18 #define _X 0x40 /* hex digit */ 19 #define _SP 0x80 /* hard space (0x20) */ 20 21 extern const unsigned char _ctype[]; 22 23 #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) 24 25 #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) 26 #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) 27 #define iscntrl(c) ((__ismask(c)&(_C)) != 0) 28 #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) 29 #define islower(c) ((__ismask(c)&(_L)) != 0) 30 #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) 31 #define ispunct(c) ((__ismask(c)&(_P)) != 0) 32 /* Note: isspace() must return false for %NUL-terminator */ 33 #define isspace(c) ((__ismask(c)&(_S)) != 0) 34 #define isupper(c) ((__ismask(c)&(_U)) != 0) 35 #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) 36 37 #define isascii(c) (((unsigned char)(c))<=0x7f) 38 #define toascii(c) (((unsigned char)(c))&0x7f) 39 40 #if __has_builtin(__builtin_isdigit) 41 #define isdigit(c) __builtin_isdigit(c) 42 #else isdigit(int c)43static inline int isdigit(int c) 44 { 45 return '0' <= c && c <= '9'; 46 } 47 #endif 48 __tolower(unsigned char c)49static inline unsigned char __tolower(unsigned char c) 50 { 51 if (isupper(c)) 52 c -= 'A'-'a'; 53 return c; 54 } 55 __toupper(unsigned char c)56static inline unsigned char __toupper(unsigned char c) 57 { 58 if (islower(c)) 59 c -= 'a'-'A'; 60 return c; 61 } 62 63 #define tolower(c) __tolower(c) 64 #define toupper(c) __toupper(c) 65 66 /* 67 * Fast implementation of tolower() for internal usage. Do not use in your 68 * code. 69 */ _tolower(const char c)70static inline char _tolower(const char c) 71 { 72 return c | 0x20; 73 } 74 75 /* Fast check for octal digit */ isodigit(const char c)76static inline int isodigit(const char c) 77 { 78 return c >= '0' && c <= '7'; 79 } 80 81 #endif 82