/* crypto/stack/stack.h */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([email protected]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 cryptographic software written by
 *     Eric Young ([email protected])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([email protected])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef HEADER_STACK_H
#define HEADER_STACK_H

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct stack_st
	{
	int num;
	char **data;
	int sorted;

	int num_alloc;
	int (*comp)(const char * const *, const char * const *);
	} STACK;

#define M_sk_num(sk)		((sk) ? (sk)->num:-1)
#define M_sk_value(sk,n)	((sk) ? (sk)->data[n] : NULL)

int sk_num(const STACK *);
char *sk_value(const STACK *, int);

char *sk_set(STACK *, int, char *);

STACK *sk_new(int (*cmp)(const char * const *, const char * const *));
STACK *sk_new_null(void);
void sk_free(STACK *);
void sk_pop_free(STACK *st, void (*func)(void *));
int sk_insert(STACK *sk,char *data,int where);
char *sk_delete(STACK *st,int loc);
char *sk_delete_ptr(STACK *st, char *p);
int sk_find(STACK *st,char *data);
int sk_find_ex(STACK *st,char *data);
int sk_push(STACK *st,char *data);
int sk_unshift(STACK *st,char *data);
char *sk_shift(STACK *st);
char *sk_pop(STACK *st);
void sk_zero(STACK *st);
int (*sk_set_cmp_func(STACK *sk, int (*c)(const char * const *,
			const char * const *)))
			(const char * const *, const char * const *);
STACK *sk_dup(STACK *st);
void sk_sort(STACK *st);
int sk_is_sorted(const STACK *st);

#ifdef  __cplusplus
}
#endif

#endif