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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.
*
*/
// Heavily inspired by hoc
// Copyright (C) AT&T 1995
// All Rights Reserved
//
// Permission to use, copy, modify, and distribute this software and
// its documentation for any purpose and without fee is hereby
// granted, provided that the above copyright notice appear in all
// copies and that both that the copyright notice and this
// permission notice and warranty disclaimer appear in supporting
// documentation, and that the name of AT&T or any of its entities
// not be used in advertising or publicity pertaining to
// distribution of the software without specific, written prior
// permission.
//
// AT&T DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
// INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
// IN NO EVENT SHALL AT&T OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
// SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
// IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
// ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
// THIS SOFTWARE.
#include "engines/director/lingo/lingo.h"
#include "common/file.h"
#include "audio/decoders/wave.h"
#include "director/lingo/lingo-gr.h"
namespace Director {
void Lingo::execute(int pc) {
for(_pc = pc; (*_currentScript)[_pc] != STOP && !_returning;) {
for (int i = 0; i < _stack.size(); i++) {
debugN(5, "%d ", _stack[i].u.i);
}
debug(5, "");
_pc++;
(*((*_currentScript)[_pc - 1]))();
}
}
Symbol *Lingo::lookupVar(const char *name, bool create, bool putInGlobalList) {
Symbol *sym;
// Looking for the cast member constants
if (_vm->getVersion() < 4) { // TODO: There could be a flag 'Allow Outdated Lingo' in Movie Info in D4
if (strlen(name) == 3) {
if (tolower(name[0]) >= 'a' && tolower(name[0]) <= 'h' &&
name[1] >= '1' && name[1] <= '8' &&
name[2] >= '1' && name[2] <= '8') {
if (!create)
error("Cast reference used in wrong context: %s", name);
int val = (tolower(name[0]) - 'a') * 64 + (name[1] - '1') * 8 + (name[2] - '1') + 1;
sym = new Symbol;
sym->type = CASTREF;
sym->u.i = val;
return sym;
}
}
}
if (!_localvars->contains(name)) { // Create variable if it was not defined
if (!create)
return NULL;
sym = new Symbol;
sym->name = (char *)calloc(strlen(name) + 1, 1);
Common::strlcpy(sym->name, name, strlen(name) + 1);
sym->type = VOID;
sym->u.i = 0;
(*_localvars)[name] = sym;
if (putInGlobalList) {
sym->global = true;
_globalvars[name] = sym;
}
} else {
sym = (*_localvars)[name];
if (sym->global)
sym = _globalvars[name];
}
return sym;
}
void Lingo::cleanLocalVars() {
// Clean up current scope local variables and clean up memory
for (SymbolHash::const_iterator h = _localvars->begin(); h != _localvars->end(); ++h) {
if (!h->_value->global)
delete h->_value;
}
delete g_lingo->_localvars;
}
void Lingo::define(Common::String &name, int start, int nargs, Common::String *prefix) {
Symbol *sym;
if (prefix)
name = *prefix + "-" + name;
debug(3, "define(\"%s\", %d, %d, %d)", name.c_str(), start, _currentScript->size() - 1, nargs);
if (!_handlers.contains(name)) { // Create variable if it was not defined
sym = new Symbol;
sym->name = (char *)calloc(name.size() + 1, 1);
Common::strlcpy(sym->name, name.c_str(), name.size() + 1);
sym->type = HANDLER;
_handlers[name] = sym;
} else {
sym = g_lingo->_handlers[name];
warning("Redefining handler '%s'", name.c_str());
delete sym->u.defn;
}
sym->u.defn = new ScriptData(&(*_currentScript)[start], _currentScript->size() - start + 1);
sym->nargs = nargs;
}
int Lingo::codeString(const char *str) {
int numInsts = calcStringAlignment(str);
// Where we copy the string over
int pos = _currentScript->size();
// Allocate needed space in script
for (int i = 0; i < numInsts; i++)
_currentScript->push_back(0);
byte *dst = (byte *)&_currentScript->front() + pos * sizeof(inst);
memcpy(dst, str, strlen(str) + 1);
return _currentScript->size();
}
int Lingo::codeFloat(double f) {
int numInsts = calcCodeAlignment(sizeof(double));
// Where we copy the string over
int pos = _currentScript->size();
// Allocate needed space in script
for (int i = 0; i < numInsts; i++)
_currentScript->push_back(0);
double *dst = (double *)((byte *)&_currentScript->front() + pos * sizeof(inst));
*dst = f;
return _currentScript->size();
}
void Lingo::codeArg(Common::String *s) {
_argstack.push_back(s);
}
void Lingo::codeArgStore() {
while (true) {
if (_argstack.empty()) {
break;
}
Common::String *arg = _argstack.back();
_argstack.pop_back();
code1(c_varpush);
codeString(arg->c_str());
code1(c_assign);
code1(c_xpop);
delete arg;
}
}
int Lingo::codeId(Common::String &s) {
return codeId_(s);
}
int Lingo::codeId_(Common::String &name) {
int ret;
ret = code1(c_varpush);
codeString(name.c_str());
code1(c_eval);
return ret;
}
void Lingo::codeLabel(int label) {
_labelstack.push_back(label);
}
void Lingo::processIf(int elselabel, int endlabel) {
inst ielse1, iend;
int else1 = elselabel;
WRITE_UINT32(&iend, endlabel);
while (true) {
if (_labelstack.empty()) {
warning("Label stack underflow");
break;
}
int label = _labelstack.back();
_labelstack.pop_back();
// This is beginning of our if()
if (!label)
break;
WRITE_UINT32(&ielse1, else1);
(*_currentScript)[label + 2] = ielse1; /* elsepart */
(*_currentScript)[label + 3] = iend; /* end, if cond fails */
else1 = label;
}
}
void Lingo::codeFactory(Common::String &name) {
_currentFactory = name;
}
}
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