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/*
 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
 * All rights reserved.
 *
 * 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. Neither the name of The TenDRA Project 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.
 *
 * $Id$
 */
/*
                 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;

        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/


#ifndef TREE_INCLUDED
#define TREE_INCLUDED


/*
    STRUCTURE DEFINITION : WORD

    The structure word is used to record the layout of the pretty
    printed TDF tree.  It consists of a layout type (see below
    for details), a string of characters, together with the length
    of this string, and pointers to the "son" and "brother" words.
*/


typedef struct s_word {
    char type;
    int length;
    char *text;
    struct s_word *son;
    struct s_word *bro;
} word;


/*
    WORD LAYOUT TYPES

    The available layout types are :

        SIMPLE - representing a simple word,
        HORIZ_NONE - a word with a number of arguments listed horizontally,
        HORIZ_BRACKETS - a word with arguments listed horizontally in brackets,
        VERT_NONE - a word with arguments listed vertically,
        VERT_BRACKETS - a word with arguments listed vertically in brackets.
*/

#define SIMPLE                  0
#define HORIZ_BRACKETS          1
#define VERT_BRACKETS           2
#define HORIZ_NONE              3
#define VERT_NONE               4


/*
    TDF TREE MANIPULATION

    The layout of the pretty-printed TDF tree is recorded in the
    structure word. The routine new_word allocates a new word of
    a given type.  The macro end_word is used to indicate the end
    of a complex word.  The routine format combines these with
    decode to provide a convenient way of decoding a word with a
    number of arguments of given sorts.
*/

#define blank_line()            (void)new_word(SIMPLE)
#define end_word(X)             word_ptr = (X); word_ptr->bro = null

extern int length;
extern word word1;
extern word *word_ptr;

extern void initialize_tree(void);
extern word *new_word(int);
extern void out_char(int);
extern void out_string(char *);
extern void out(char *);
extern void out_int(long);
extern void out_signed(char *, int);
extern void out_unique(unique);
extern void format(int, char *, char *);


#endif