spat.h

早期freebsd实现

/* $RCSfile: spat.h,v $$Revision: 4.0.1.1 $$Date: 91/06/07 11:51:59 $
 *
 *    Copyright (c) 1991, Larry Wall
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 *
 * $Log:	spat.h,v $
 * Revision 4.0.1.1  91/06/07  11:51:59  lwall
 * patch4: new copyright notice
 * patch4: added global modifier for pattern matches
 * 
 * Revision 4.0  91/03/20  01:39:36  lwall
 * 4.0 baseline.
 * 
 */

struct scanpat {
    SPAT	*spat_next;		/* list of all scanpats */
    REGEXP	*spat_regexp;		/* compiled expression */
    ARG		*spat_repl;		/* replacement string for subst */
    ARG		*spat_runtime;		/* compile pattern at runtime */
    STR		*spat_short;		/* for a fast bypass of execute() */
    short	spat_flags;
    char	spat_slen;
};

#define SPAT_USED 1			/* spat has been used once already */
#define SPAT_ONCE 2			/* use pattern only once per reset */
#define SPAT_SCANFIRST 4		/* initial constant not anchored */
#define SPAT_ALL 8			/* initial constant is whole pat */
#define SPAT_SKIPWHITE 16		/* skip leading whitespace for split */
#define SPAT_FOLD 32			/* case insensitivity */
#define SPAT_CONST 64			/* subst replacement is constant */
#define SPAT_KEEP 128			/* keep 1st runtime pattern forever */
#define SPAT_GLOBAL 256			/* pattern had a g modifier */

EXT SPAT *curspat;		/* what to do \ interps from */
EXT SPAT *lastspat;		/* what to use in place of null pattern */

EXT char *hint INIT(Nullch);	/* hint from cmd_exec to do_match et al */

#define Nullspat Null(SPAT*)