/*
 * Copyright (c) 2002, The Tendra Project <http://www.ten15.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 unmodified, 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 *
 *    		 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.
 *
 * $TenDRA: tendra/src/tools/tnc/file.c,v 1.7 2004/09/05 03:47:06 bp Exp $
 */


#include "config.h"
#include "fmm.h"
#include "msgcat.h"
#include "tdf_types.h"
#include "tdf_stream.h"

#include "types.h"
#include "read_types.h"
#include "analyser.h"
#include "utility.h"


/*
 *    LIST OF DIRECTORIES
 *
 *    This is the list of all directories to be searched for included files.
 */

static directory *search_path = null;


/*
 *    INPUT FILE
 *
 *    The current input file, together with its name.
 */

FILE *input;
char *input_file = null;
struct tdf_stream *tdfr;


/*
 *    OPEN INPUT FILE
 *
 *    This routine opens the file nm.  If search is true it will search
 *    for it along search_path.
 */

void
open_input(char *nm, int search)
{
    input = fopen (nm, (text_input ? "r" : "rb"));
    if (search && input == null) {
		directory *d = search_path;
		while (input == null && d) {
			char buff [1000];
			IGNORE sprintf (buff, "%s/%s", d->dirname, nm);
			input = fopen (buff, (text_input ? "r" : "rb"));
			d = d->next;
		}
    }
    if (input == null) MSG_cant_open_input_file (nm);
    input_file = nm;
    crt_line_no = 1;
    line_no = 1;
    looked_ahead = 0;
	if (!text_input)
		tdfr = tdf_fstream_createf (input, input_file);
    return;
}


/*
 *    ADD A DIRECTORY TO THE SEARCH PATH
 *
 *    The directory nm is added to search_path.
 */

void
add_directory(char *nm)
{
    directory *d = xalloc (sizeof (*d));
    d->dirname = nm;
    d->next = null;
    if (search_path == null) {
		search_path = d;
    } else {
		directory *p = search_path;
		while (p->next) p = p->next;
		p->next = d;
    }
    return;
}


/*
 *    OUTPUT FILE
 *
 *    The current output file.
 */

FILE *output /* = stdout */;


/*
 *    OPEN OUTPUT FILE
 *
 *    The output file nm is opened.
 */

void
open_output(char *nm)
{
    static char *opened = null;
    if (opened) {
		MSG_multiple_output_files_given (opened);
		return;
    }
    output = fopen (nm, (text_output ? "w" : "wb"));
    if (output == null) MSG_cant_open_output_file (nm);
    opened = nm;
    return;
}
