mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
1204c77f9b
Make isdigit into a simple range checking inline function: return '0' <= c && c <= '9'; This code is 1 branch, not 2 because any reasonable compiler can optimize this code into SUB+CMP, so the code while (isdigit((c = *s++))) ... remains 1 branch per iteration HOWEVER it suddenly doesn't do table lookup priming cacheline nobody cares about. Link: http://lkml.kernel.org/r/20160826190047.GA12536@p183.telecom.by Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
#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';
|
|
}
|
|
#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;
|
|
}
|
|
|
|
static inline unsigned char __toupper(unsigned char c)
|
|
{
|
|
if (islower(c))
|
|
c -= 'a'-'A';
|
|
return c;
|
|
}
|
|
|
|
#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;
|
|
}
|
|
|
|
/* Fast check for octal digit */
|
|
static inline int isodigit(const char c)
|
|
{
|
|
return c >= '0' && c <= '7';
|
|
}
|
|
|
|
#endif
|