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/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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
 * of the License, 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.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "sci/include/sciresource.h"

typedef struct {
	int noun;
	int verb;
	int cond;
	int seq;
} message_tuple_t;

typedef struct {
	byte *index_record;
	int index;
	byte *resource_beginning;
} index_record_cursor_t;

typedef int index_record_size_t(void);
typedef void parse_index_record_t(index_record_cursor_t *index_record, message_tuple_t *t);
typedef int get_talker_t(index_record_cursor_t *cursor);
typedef void get_text_t(index_record_cursor_t *cursor, char *buffer, int buffer_size);
typedef int index_record_count_t(byte *header);

typedef struct {
	int version_id;
	parse_index_record_t *parse;
	get_talker_t *get_talker;
	get_text_t *get_text;
	index_record_count_t *index_record_count;

	int header_size;
	int index_record_size;
} message_handler_t;

typedef struct {
	int initialized;
	message_handler_t *handler;
	ResourceManager *resmgr;
	resource_t *current_res;
	int module;
	int record_count;
	byte *index_records;
	index_record_cursor_t engine_cursor;
} message_state_t;

int message_get_specific(message_state_t *state, message_tuple_t *t);
int message_get_next(message_state_t *state);
int message_get_talker(message_state_t *state);
int message_get_length(message_state_t *state);
int message_get_text(message_state_t *state, char *buffer, int length);
int message_state_load_res(message_state_t *state, int module);
void message_state_initialize(ResourceManager *resmgr, message_state_t *state);