centralize all State related stuff

svn-id: r11577

1 files changed, 149 insertions, 0 deletions

diff --git a/queen/state.cpp b/queen/state.cpp
new file mode 100644
index 0000000000..65fc915076
--- /dev/null
+++ b/queen/state.cpp
@@ -0,0 +1,149 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2003 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "stdafx.h"
+#include "queen/state.h"
+
+namespace Queen {
+
+
+Direction State::findDirection(uint16 state) {
+	// queen.c l.4014-4021
+	static const Direction sd[] = {
+		DIR_BACK,
+		DIR_RIGHT,
+		DIR_LEFT,
+		DIR_FRONT
+	};
+	return sd[(state >> 2) & 3];
+}
+
+
+StateTalk State::findTalk(uint16 state) {
+	return (state & (1 << 9)) ? STATE_TALK_TALK : STATE_TALK_MUTE;
+}
+
+
+StateGrab State::findGrab(uint16 state) {
+	// queen.c l.4022-4029
+	static const StateGrab gd[] = {
+		STATE_GRAB_NONE,
+		STATE_GRAB_DOWN,
+		STATE_GRAB_UP,
+		STATE_GRAB_MID
+	};
+	return gd[state & 3];
+}
+
+
+StateOn State::findOn(uint16 state) {
+	return (state & (1 << 8)) ? STATE_ON_ON : STATE_ON_OFF;
+}
+
+
+Verb State::findDefaultVerb(uint16 state) {
+	Verb v;
+	switch((state >> 4) & 0xF) {
+	case 1:
+		v = Verb(VERB_OPEN);
+		break;
+	case 3:
+		v = Verb(VERB_CLOSE);
+		break;
+	case 7:
+		v = Verb(VERB_MOVE);
+		break;
+	case 8:
+		v = Verb(VERB_GIVE);
+		break;
+	case 12:
+		v = Verb(VERB_USE);
+		break;
+	case 14:
+		v = Verb(VERB_PICK_UP);
+		break;
+	case 9:
+		v = Verb(VERB_TALK_TO);
+		break;
+	case 6:
+		v = Verb(VERB_LOOK_AT);
+		break;
+	default:
+		v = Verb(VERB_NONE);
+		break;
+	}
+	return v;
+}
+
+
+StateUse State::findUse(uint16 state) {
+	return (state & (1 << 10)) ? STATE_USE : STATE_USE_ON;
+}
+
+
+void State::alterOn(uint16 *objState, StateOn state) {
+	switch (state) {
+	case STATE_ON_ON:
+		*objState |= (1 << 8);
+		break;
+	case STATE_ON_OFF:
+		*objState &= ~(1 << 8);
+		break;
+	}
+}
+
+
+void State::alterDefaultVerb(uint16 *objState, Verb v) {
+	uint16 val;
+	switch (v.value()) {
+	case VERB_OPEN:
+		val = 1;
+		break;
+	case VERB_CLOSE:
+		val = 3;
+		break;
+	case VERB_MOVE:
+		val = 7;
+		break;
+	case VERB_GIVE:
+		val = 8;
+		break;
+	case VERB_USE:
+		val = 12;
+		break;
+	case VERB_PICK_UP:
+		val = 14;
+		break;
+	case VERB_TALK_TO:
+		val = 9;
+		break;
+	case VERB_LOOK_AT:
+		val = 6;
+		break;
+	default:
+		val = 0;
+		break;
+	}
+	*objState = (*objState & ~0xF0) | (val << 4);
+}
+
+
+} // End of namespace Queen