Release 4.12 include/linux/ctype.h

#ifndef _LINUX_CTYPE_H

#define _LINUX_CTYPE_H

/*
 * NOTE! This ctype does not handle EOF like the standard C
 * library is required to.
 */


#define _U	0x01	
/* upper */

#define _L	0x02	
/* lower */

#define _D	0x04	
/* digit */

#define _C	0x08	
/* cntrl */

#define _P	0x10	
/* punct */

#define _S	0x20	
/* white space (space/lf/tab) */

#define _X	0x40	
/* hex digit */

#define _SP	0x80	
/* hard space (0x20) */

extern const unsigned char _ctype[];


#define __ismask(x) (_ctype[(int)(unsigned char)(x)])


#define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)

#define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)

#define iscntrl(c)	((__ismask(c)&(_C)) != 0)


static inline int isdigit(int c)
{
	return '0' <= c && c <= '9';
}
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#define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)

#define islower(c)	((__ismask(c)&(_L)) != 0)

#define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)

#define ispunct(c)	((__ismask(c)&(_P)) != 0)
/* Note: isspace() must return false for %NUL-terminator */

#define isspace(c)	((__ismask(c)&(_S)) != 0)

#define isupper(c)	((__ismask(c)&(_U)) != 0)

#define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)


#define isascii(c) (((unsigned char)(c))<=0x7f)

#define toascii(c) (((unsigned char)(c))&0x7f)



static inline unsigned char __tolower(unsigned char c)
{
	if (isupper(c))
		c -= 'A'-'a';
	return c;
}

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static inline unsigned char __toupper(unsigned char c)
{
	if (islower(c))
		c -= 'a'-'A';
	return c;
}

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#define tolower(c) __tolower(c)

#define toupper(c) __toupper(c)

/*
 * Fast implementation of tolower() for internal usage. Do not use in your
 * code.
 */


static inline char _tolower(const char c)
{
	return c | 0x20;
}

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/* Fast check for octal digit */


static inline int isodigit(const char c)
{
	return c >= '0' && c <= '7';
}

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#endif
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Directory: include/linux

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