[unix-history] / usr / src / bin / csh / char.h

/* @(#)char.h	4.1 (Berkeley) %G% */

/*
 * Table for spotting special characters quickly
 *
 * Makes for very obscure but efficient coding.
 */

extern char _cmap[];

#define _Q	0x01		/* '" */
#define _Q1	0x02		/* ` */
#define _SP	0x04		/* space and tab */
#define _NL	0x08		/* \n */
#define _META	0x10		/* lex meta characters, sp #'`";&<>()|\t\n */
#define _GLOB	0x20		/* glob characters, *?{[` */
#define _ESC	0x40		/* \ */
#define _DOL	0x80		/* $ */

#define cmap(c, bits)	(_cmap[(unsigned char)(c)] & (bits))

#define isglob(c)	cmap(c, _GLOB)
#define isspace(c)	cmap(c, _SP)
#define isspnl(c)	cmap(c, _SP|_NL)
#define ismeta(c)	cmap(c, _META)
Commit	Line	Data
13a4113c EW	1	/* @(#)char.h 4.1 (Berkeley) %G% */
	2
	3	/*
	4	* Table for spotting special characters quickly
	5	*
	6	* Makes for very obscure but efficient coding.
	7	*/
	8
	9	extern char _cmap[];
	10
	11	#define _Q 0x01 /* '" */
	12	#define _Q1 0x02 /* ` */
	13	#define _SP 0x04 /* space and tab */
	14	#define _NL 0x08 /* \n */
	15	#define _META 0x10 /* lex meta characters, sp #'`";&<>()\|\t\n */
	16	#define _GLOB 0x20 /* glob characters, ?{[` /
	17	#define _ESC 0x40 /* \ */
	18	#define _DOL 0x80 /* $ */
	19
	20	#define cmap(c, bits) (_cmap[(unsigned char)(c)] & (bits))
	21
	22	#define isglob(c) cmap(c, _GLOB)
	23	#define isspace(c) cmap(c, _SP)
	24	#define isspnl(c) cmap(c, _SP\|_NL)
	25	#define ismeta(c) cmap(c, _META)