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Synch with my current work.
Numerous changes:
- generate can build several tables
- style cleanup
- statistics code
- use variable names throughout (struct Name)
- recursive variables everywhere
- faster parser (pass buffer along instead of allocating multiple copies)
- correct parser. Handles comments everywhere, and ; correctly
- more string intervals
- simplified dir.c, less recursion.
- extended for loops
- sinclude()
- finished removing extra junk from Lst_*
- handles ${@D} and friends in a simpler way
- cleaned up and modular VarModifiers handling.
- recognizes some gnu Makefile usages and errors out about them.

Additionally, some extra functionality is defined by FEATURES. The set of
functionalities is currently hardcoded to OpenBSD defaults, but this may
include support for some NetBSD extensions, like ODE modifiers.

Backed by miod@ and millert@, who finally got sick of my endless patches...

/*	$OpenPackages$ */
/*	$OpenBSD: dir.h,v 1.14 2001/05/03 13:41:04 espie Exp $	*/
/*	$NetBSD: dir.h,v 1.4 1996/11/06 17:59:05 christos Exp $ */

/*
 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
 * Copyright (c) 1988, 1989 by Adam de Boor
 * Copyright (c) 1989 by Berkeley Softworks
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Adam de Boor.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)dir.h 8.1 (Berkeley) 6/6/93
 */

/* dir.h --
 */

#ifndef DIR_H
#define DIR_H

typedef struct Path_ {
    int 	  refCount;	/* Number of paths with this directory */
    int 	  hits; 	/* the number of times a file in this
				 * directory has been found */
    struct ohash   files;	/* Hash table of files in directory */
    char	  name[1];	/* Name of directory */
} Path;

extern void Dir_Init(void);
extern void Dir_End(void);
extern Boolean Dir_HasWildcards(const char *);
extern void Dir_Expand(const char *, Lst, Lst);
extern char *Dir_FindFilei(const char *, const char *, Lst);
#define Dir_FindFile(n, e) Dir_FindFilei(n, strchr(n, '\0'), e)
extern TIMESTAMP Dir_MTime(GNode *);
extern void Dir_AddDir(Lst, const char *, const char *);
extern char *Dir_MakeFlags(const char *, Lst);
extern void Dir_Concat(Lst, Lst);
extern void Dir_PrintDirectories(void);
extern void Dir_PrintPath(Lst);
extern void Dir_Destroy(void *);
extern void *Dir_CopyDir(void *);
extern int set_times(const char *);

#endif /* DIR_H */