/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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/*
 * shexp.h: Defines and prototypes for shell exp. match routines
 * 
 *
 * This routine will match a string with a shell expression. The expressions
 * accepted are based loosely on the expressions accepted by zsh.
 * 
 * o * matches anything
 * o ? matches one character
 * o \ will escape a special character
 * o $ matches the end of the string
 * o [abc] matches one occurence of a, b, or c. The only character that needs
 *         to be escaped in this is ], all others are not special.
 * o [a-z] matches any character between a and z
 * o [^az] matches any character except a or z
 * o ~ followed by another shell expression will remove any pattern
 *     matching the shell expression from the match list
 * o (foo|bar) will match either the substring foo, or the substring bar.
 *             These can be shell expressions as well.
 * 
 * The public interface to these routines is documented below.
 * 
 */
 
#ifndef SHEXP_H
#define SHEXP_H

/*
 * Requires that the macro MALLOC be set to a "safe" malloc that will 
 * exit if no memory is available. 
 */


/* --------------------------- Public routines ---------------------------- */


/*
 * shexp_valid takes a shell expression exp as input. It returns:
 * 
 *  NON_SXP      if exp is a standard string
 *  INVALID_SXP  if exp is a shell expression, but invalid
 *  VALID_SXP    if exp is a valid shell expression
 */

#define NON_SXP -1
#define INVALID_SXP -2
#define VALID_SXP 1

SEC_BEGIN_PROTOS

extern int PORT_RegExpValid(const char *exp);

extern int PORT_RegExpSearch(const char *str, const char *exp);

/* same as above but uses case insensitive search */
extern int PORT_RegExpCaseSearch(const char *str, const char *exp);

SEC_END_PROTOS

#endif
