ctype.h,v

linux-0.10 对于想了解linux内核,而又不想花太多精力的人,最好就是这种低版本,而具有核心价值的程序

head     1.2;
branch   ;
access   ;
symbols  ;
locks    ; strict;
comment  @ * @;


1.2
date     91.11.15.19.30.40;  author tytso;  state Exp;
branches ;
next     1.1;

1.1
date     91.11.15.16.16.12;  author tytso;  state Exp;
branches ;
next     ;


desc
@@


1.2
log
@Fixed bug in tolower().  Plus sign should have been a minus sign.
@
text
@#ifndef _CTYPE_H
#define _CTYPE_H

#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 unsigned char _ctype[];
extern char _ctmp;

#define isalnum(c) ((_ctype+1)[c]&(_U|_L|_D))
#define isalpha(c) ((_ctype+1)[c]&(_U|_L))
#define iscntrl(c) ((_ctype+1)[c]&(_C))
#define isdigit(c) ((_ctype+1)[c]&(_D))
#define isgraph(c) ((_ctype+1)[c]&(_P|_U|_L|_D))
#define islower(c) ((_ctype+1)[c]&(_L))
#define isprint(c) ((_ctype+1)[c]&(_P|_U|_L|_D|_SP))
#define ispunct(c) ((_ctype+1)[c]&(_P))
#define isspace(c) ((_ctype+1)[c]&(_S))
#define isupper(c) ((_ctype+1)[c]&(_U))
#define isxdigit(c) ((_ctype+1)[c]&(_D|_X))

#define isascii(c) (((unsigned) c)<=0x7f)
#define toascii(c) (((unsigned) c)&0x7f)

#define tolower(c) (_ctmp=c,isupper(_ctmp)?_ctmp+('a'-'A'):_ctmp)
#define toupper(c) (_ctmp=c,islower(_ctmp)?_ctmp+('A'-'a'):_ctmp)

#endif
@


1.1
log
@Initial revision
@
text
@d31 1
a31 1
#define tolower(c) (_ctmp=c,isupper(_ctmp)?_ctmp+('a'+'A'):_ctmp)
@