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/* $Id: ternary.h,v 1.4 2001-11-22 00:31:10 rjkaes Exp $
*
* See 'ternary.c' for a detailed description.
*
* Copyright (C) 2000 Robert James Kaes (rjkaes@flarenet.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef _TINYPROXY_TERNARY_H_
#define _TINYPROXY_TERNARY_H_
/*
* Holds our token for a ternary tree.
*/
typedef long int TERNARY;
/*
* Macros for testing for errors from the various functions.
*/
#define TE_ISERROR(x) ((x) < 0) /* true if x is tlib error code */
#define TE_NONE 0 /* no errors */
/*
* Contains any error messages from the functions.
*/
extern char te_errbuf[256];
/*
* Macros to fill in te_errbuf
*/
#define ERRBUF(str) strncpy(te_errbuf, str, sizeof(te_errbuf))
#define ERRBUF2(str,n) sprintf(te_errbuf, str, n)
#define ERRBUF3(str,n,m) sprintf(te_errbuf, str, n, m)
/*
* Error return codes
*/
#define TE_BADTOKEN -3 /* back token for the trees */
#define TE_EMPTY -4 /* there is no data found */
#define TE_TOOFULL -5 /* the buffers are filled */
#define TE_NOROOM -6 /* can't allocate space (sys err) */
#define TE_TOOMANYTS -7 /* too many trees in use */
#define TE_INTINCON -8 /* internal inconsistency */
#define TE_EXISTS -9 /* key already exists in tree */
/*
* Library functions.
*/
extern TERNARY ternary_new(void);
extern int ternary_destroy(TERNARY tno, void (*freeptr) (void *));
#define ternary_insert(x, y, z) ternary_insert_replace(x, y, z, 0)
#define ternary_replace(x, y, z) ternary_insert_replace(x, y, z, 1)
extern int ternary_insert_replace(TERNARY tno, const char *s, void *data,
short int replace);
extern int ternary_search(TERNARY tno, const char *s, void **data);
#endif
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