root/tools/include/linux/ctype.h

INCLUDED FROM

DEFINITIONS

1. __isdigit
2. __tolower
3. __toupper
4. _tolower
5. isodigit

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