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81 lines
1.9 KiB
81 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_CTYPE_H |
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#define _LINUX_CTYPE_H |
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#include <linux/compiler.h> |
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/* |
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* NOTE! This ctype does not handle EOF like the standard C |
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* library is required to. |
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*/ |
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#define _U 0x01 /* upper */ |
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#define _L 0x02 /* lower */ |
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#define _D 0x04 /* digit */ |
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#define _C 0x08 /* cntrl */ |
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#define _P 0x10 /* punct */ |
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#define _S 0x20 /* white space (space/lf/tab) */ |
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#define _X 0x40 /* hex digit */ |
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#define _SP 0x80 /* hard space (0x20) */ |
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extern const unsigned char _ctype[]; |
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#define __ismask(x) (_ctype[(int)(unsigned char)(x)]) |
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#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) |
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#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) |
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#define iscntrl(c) ((__ismask(c)&(_C)) != 0) |
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#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) |
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#define islower(c) ((__ismask(c)&(_L)) != 0) |
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#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) |
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#define ispunct(c) ((__ismask(c)&(_P)) != 0) |
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/* Note: isspace() must return false for %NUL-terminator */ |
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#define isspace(c) ((__ismask(c)&(_S)) != 0) |
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#define isupper(c) ((__ismask(c)&(_U)) != 0) |
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#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) |
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#define isascii(c) (((unsigned char)(c))<=0x7f) |
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#define toascii(c) (((unsigned char)(c))&0x7f) |
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#if __has_builtin(__builtin_isdigit) |
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#define isdigit(c) __builtin_isdigit(c) |
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#else |
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static inline int isdigit(int c) |
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{ |
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return '0' <= c && c <= '9'; |
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} |
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#endif |
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static inline unsigned char __tolower(unsigned char c) |
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{ |
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if (isupper(c)) |
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c -= 'A'-'a'; |
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return c; |
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} |
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static inline unsigned char __toupper(unsigned char c) |
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{ |
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if (islower(c)) |
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c -= 'a'-'A'; |
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return c; |
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} |
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#define tolower(c) __tolower(c) |
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#define toupper(c) __toupper(c) |
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/* |
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* Fast implementation of tolower() for internal usage. Do not use in your |
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* code. |
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*/ |
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static inline char _tolower(const char c) |
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{ |
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return c | 0x20; |
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} |
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/* Fast check for octal digit */ |
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static inline int isodigit(const char c) |
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{ |
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return c >= '0' && c <= '7'; |
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} |
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#endif
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