/*
 * 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/pl/units.c,v 1.9 2005/09/18 20:28:57 stefanf Exp $
 */


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

#include "readstreams.h"
#include "streams.h"
#include "units.h"
#include "encodings.h"
#include "enc_nos.h"
#include "includes.h"
#include "errors.h"
#include "defs.h"
#include "syntax.h"


FILE *out_file;
Unit units[NO_OF_UNITS];
int current_Unit;
int capsule_names[NO_OF_ENTITIES];
TDF lk_externs[NO_OF_ENTITIES];
char * ent_names[NO_OF_ENTITIES] = {"token","tag","alignment"};
char * unit_names[NO_OF_UNITS] =
{"tld", "versions", "tokdec", "tokdef", "aldef", "tagdec",
 "tagdef"};

int line_no_tok = -1;


int
next_label(void)
{
	return (units[current_Unit].no_labs++);
}


int
next_unit_name(int ent)
{
	return ((units[current_Unit].no_entity)[ent]++);
}


Name
next_name(int ent)
{
	Name ans;
	ans.unit_no = current_Unit;
	ans.unit_name = next_unit_name(ent);
	return ans;
}


int
next_capsule_name(int ent)
{
	return (capsule_names[ent]++);
}


int
capsule_name(Name * n, int ent)
{
	Unit * nl_unit = & units[n->unit_no];
	Link * nl_links = (nl_unit->links)[ent];
	while (nl_links != (Link*)0) {
		if (n->unit_name == nl_links->unit_name)
			return nl_links->capsule_name;
		nl_links = nl_links->next;
	}
	Assert(n->unit_name < (nl_unit->no_entity)[ent]);
	nl_links = xalloc(sizeof(*nl_links));
	nl_links->capsule_name = next_capsule_name(ent);
	nl_links->unit_name = n->unit_name;
	nl_links->next = (nl_unit->links)[ent];
	(nl_unit->links)[ent] = nl_links;
	return nl_links->capsule_name;
}


int
cname_to_lname(int c_name, int ent)
{
	Link * links = (units[current_Unit].links)[ent];
	while (links != (Link*)0) {
		if (c_name == links->capsule_name) return links->unit_name;
		links = links->next;
	}
	links = xalloc(sizeof(*links));
	links->capsule_name = c_name;
	links->unit_name = next_unit_name(ent);
	links->next = (units[current_Unit].links)[ent];
	(units[current_Unit].links)[ent] = links;
	return links->unit_name;
}


int
non_local(Name * n, int ent)
{
	return cname_to_lname(capsule_name(n, ent),ent);
}


void
make_tag(Name * n)
{
  	int loc_name = (current_Unit == n->unit_no)? n->unit_name:
		non_local(n, tag_ent);
	Assert(loc_name<(units[current_Unit].no_entity)[tag_ent]);
	o_make_tag(out_tdfint32(UL(loc_name)));
}


void
make_tok(Name * n)
{
  	int loc_name = (current_Unit == n->unit_no)? n->unit_name:
		non_local(n, tok_ent);
	Assert(loc_name<(units[current_Unit].no_entity)[tok_ent]);
	o_make_tok(out_tdfint32(UL(loc_name)));
}


void
make_al_tag(Name * n)
{
  	int loc_name = (current_Unit == n->unit_no)? n->unit_name:
		non_local(n, al_tag_ent);
	Assert(loc_name<(units[current_Unit].no_entity)[al_tag_ent]);
	o_make_al_tag(out_tdfint32(UL(loc_name)));
}


long
local_name(Name * n, int ent)
{
	int loc_name = (current_Unit == n->unit_no)? n->unit_name:
		non_local(n, ent);
	Assert(loc_name<(units[current_Unit].no_entity)[ent]);
	return loc_name;
}


void
FILENAME(void)
{
	o_make_filename(
		o_make_nat(out_tdfint32(UL(0))),
		out_tdfstring_bytes("?",8,1),
		out_tdfstring_bytes(file_name, 8, UI(strlen(file_name)))
		);
}


void
init_units(void)
{
	int i,j;
	if (MAJOR_NO == 4 && MINOR_NO == 1) {
		MINOR_NO = 0;
	}
	for (i=0; i<NO_OF_UNITS; i++) {
		Unit * u = & units[i];
		INIT_TDF(&u->tdf);
		u->no_labs = 0;
		u->present = (i==version_unit || i == tld2_unit);
		for (j=0; j<NO_OF_ENTITIES; j++) {
			(u->no_entity)[j] = 0;
			(u->links)[j] = (Link*)0;
		}
	}
}


static void
make_links(Link * l)
{
	o_make_links(
	{ while (l!=(Link*)0) {
	   	LIST_ELEM(
			o_make_link(out_tdfint32(UL(l->unit_name)),
						out_tdfint32(UL(l->capsule_name))
				)
			);
	   	l = l->next;
	}
	}
		);
}


static void
props(int unit_no)
{
	Unit * u = units+unit_no;
	TDF temp;
	NEW_STREAM (&temp,
				switch (unit_no) {
				case version_unit:
					o_make_versions(
					{ LIST_ELEM(o_make_version(out_tdfint32(MAJOR_NO),
											   out_tdfint32(MINOR_NO)
									)
						);
					}
						);
					break;
				case tokdec_unit:
					o_make_tokdecs({ append_TDF(&u->tdf, 1);
					current_TDF->no = u->tdf.no;
					}
						);
					break;
				case tokdef_unit:
					o_make_tokdefs(out_tdfint32(UL(u->no_labs)),
					{ append_TDF(&u->tdf, 1);
					current_TDF->no = u->tdf.no;
					}
						);
					break;
				case tagdec_unit:
					o_make_tagdecs(out_tdfint32(UL(u->no_labs)),
					{ append_TDF(&u->tdf, 1);
					current_TDF->no = u->tdf.no;
					}
						);
					break;
				case tagdef_unit:
					o_make_tagdefs(out_tdfint32(UL(u->no_labs)),
					{ append_TDF(&u->tdf, 1);
					current_TDF->no = u->tdf.no;
					}
						);
					break;
				case al_tagdef_unit:
					o_make_al_tagdefs(out_tdfint32(UL(u->no_labs)),
					{ append_TDF(&u->tdf, 1);
					current_TDF->no = u->tdf.no;
					}
						);
					break;
				default: MSG_dont_know_unit_type();
				}
		);
	append_bytestream(&temp,1);
}


void
make_unit(int unit_no)
{
	Unit * u = units+unit_no;
	int i;
	o_make_unit(
		if (unit_no != tld2_unit)
	{ for (i=0; i<NO_OF_ENTITIES; i++) {
	   	LIST_ELEM(out_tdfint32(UL(u->no_entity[i])));
	}
	},
		if (unit_no != tld2_unit)
	{ for (i=0; i<NO_OF_ENTITIES; i++) {
	   	LIST_ELEM(make_links(u->links[i]));
	}
	},
		if (unit_no != tld2_unit)
	{ props(unit_no); }
		else { append_bytestream(&u->tdf, 1);	}
		);
}


static int
get_byte(void)
{
	unsigned int x=0;
	int i;
	for (i=7; i>=0; i--) {
		unsigned int y = get_bit();
		if (y>1) return -1;
		x+= (y<<i);
	}
	return (int)x;
}


void
make_tdf_file(TDF * s, FILE * file)
{
  	Instream ins;
  	Chunk * ch = s->first;
  	int offst = 0;
  	int x;
	curin = &ins;
	curin->ch = ch;
	curin->byte_pos = 0;
	curin->bit_pos = 0;

	while (ch != (Chunk*)0)	{
		offst += ch->offst;
		offst &= 7;
		if (ch->next == (Chunk*)0 || ch->next->aligned) {
			if (offst !=0) {
				ch->offst += (unsigned char)(8-offst);
				if (ch->offst >= 8) { ch->usage+=1; ch->offst-=8; }
				offst=0;
			}
		}
		ch = ch->next;
	}

	while ((x = get_byte())>=0) {
		IGNORE fputc(x, file);
	}
}