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90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GLK_ALAN3_ALT_INFO
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#define GLK_ALAN3_ALT_INFO
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/* An info node about the Verb Alternatives found and possibly executed */
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#include "glk/alan3/types.h"
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#include "glk/alan3/acode.h"
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#include "glk/jumps.h"
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#include "glk/alan3/params.h"
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#include "glk/alan3/parameter_position.h"
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namespace Glk {
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namespace Alan3 {
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/* Constants */
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#define GLOBAL_LEVEL (0)
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#define LOCATION_LEVEL (1)
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#define PARAMETER_LEVEL (2)
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#define NO_PARAMETER ((Aword)-1)
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#define NO_INSTANCE ((Aword)-1)
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#define NO_CLASS ((Aword)-1)
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/* tryCheck() flags */
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#define EXECUTE_CHECK_BODY_ON_FAIL TRUE
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#define DONT_EXECUTE_CHECK_BODY_ON_FAIL FALSE
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/* Types */
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struct AltInfo {
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bool end; /* Indicator of end in AltInfoArray, first empty has TRUE here */
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AltEntry *alt;
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bool done;
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Aint level; /* 0 - Global, 1 - location, 2 - parameter */
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Aid _class; /* In which class, only used for tracing */
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Aid instance; /* In which instance the Alternative was found,
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used to set current.instance and tracing */
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Aid parameter; /* In which parameter, only used for tracing */
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};
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typedef AltEntry *(*AltEntryFinder)(int verb, int parameterNumber, int theInstance, int theClass);
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typedef AltInfo AltInfoArray[];
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/* Data */
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/* Functions */
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extern void primeAltInfo(AltInfo *altInfo, int level, int parameter, int instance, int cls);
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extern bool executedOk(CONTEXT, AltInfo *altInfo);
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extern bool checkFailed(CONTEXT, AltInfo *altInfo, bool execute);
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extern bool canBeExecuted(AltInfo *altInfo);
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extern AltInfo *duplicateAltInfoArray(AltInfoArray altInfos);
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extern int lastAltInfoIndex(AltInfoArray altInfos);
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extern bool anyCheckFailed(CONTEXT, AltInfoArray altInfos, bool execute);
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extern bool anythingToExecute(AltInfoArray altInfos);
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extern bool possible(CONTEXT, int verb, Parameter parameters[], ParameterPosition parameterPositions[]);
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extern AltInfo *findAllAlternatives(int verb, Parameter parameters[]);
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} // End of namespace Alan3
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} // End of namespace Glk
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#endif
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