reg_t reg_t::operator+(const reg_t right) const {
if (isPointer() && right.isNumber()) {
// Pointer arithmetics. Only some pointer types make sense here
SegmentObj *mobj = g_sci->getEngineState()->_segMan->getSegmentObj(getSegment());
if (!mobj)
error("[VM]: Attempt to add %d to invalid pointer %04x:%04x", right.getOffset(), PRINT_REG(*this));
switch (mobj->getType()) {
case SEG_TYPE_LOCALS:
case SEG_TYPE_SCRIPT:
case SEG_TYPE_STACK:
case SEG_TYPE_DYNMEM:
return make_reg(getSegment(), getOffset() + right.toSint16());
default:
return lookForWorkaround(right, "addition");
}
} else if (isNumber() && right.isPointer()) {
// Adding a pointer to a number, flip the order
return right + *this;
} else if (isNumber() && right.isNumber()) {
// Normal arithmetics
return make_reg(0, toSint16() + right.toSint16());
} else {
return lookForWorkaround(right, "addition");
}
}
reg_t reg_t::operator-(const reg_t right) const {
if (getSegment() == right.getSegment()) {
// We can subtract numbers, or pointers with the same segment,
// an operation which will yield a number like in C
return make_reg(0, toSint16() - right.toSint16());
} else {
return *this + make_reg(right.getSegment(), -right.toSint16());
}
}
void GuestAdditions::syncAudioVolumeGlobalsToScummVM(const int index, const reg_t value) const {
switch (g_sci->getGameId()) {
case GID_GK2:
if (index == kGlobalVarGK2MusicVolume) {
const int16 musicVolume = value.toSint16() * Audio::Mixer::kMaxMixerVolume / Audio32::kMaxVolume;
ConfMan.setInt("music_volume", musicVolume);
}
break;
case GID_LSL6HIRES:
if (index == kGlobalVarLSL6HiresMusicVolume) {
const int16 musicVolume = value.toSint16() * Audio::Mixer::kMaxMixerVolume / kLSL6HiresUIVolumeMax;
ConfMan.setInt("music_volume", musicVolume);
}
break;
case GID_PHANTASMAGORIA:
if (index == kGlobalVarPhant1MusicVolume) {
const int16 musicVolume = value.toSint16() * Audio::Mixer::kMaxMixerVolume / MUSIC_MASTERVOLUME_MAX;
ConfMan.setInt("music_volume", musicVolume);
} else if (index == kGlobalVarPhant1DACVolume) {
const int16 dacVolume = value.toSint16() * Audio::Mixer::kMaxMixerVolume / Audio32::kMaxVolume;
ConfMan.setInt("sfx_volume", dacVolume);
ConfMan.setInt("speech_volume", dacVolume);
}
break;
case GID_TORIN:
if (index == kGlobalVarTorinMusicVolume ||
index == kGlobalVarTorinSFXVolume ||
index == kGlobalVarTorinSpeechVolume) {
const int16 volume = value.toSint16() * Audio::Mixer::kMaxMixerVolume / 100;
switch (index) {
case kGlobalVarTorinMusicVolume:
ConfMan.setInt("music_volume", volume);
break;
case kGlobalVarTorinSFXVolume:
ConfMan.setInt("sfx_volume", volume);
break;
case kGlobalVarTorinSpeechVolume:
ConfMan.setInt("speech_volume", volume);
break;
}
}
break;
default:
break;
}
}
void GuestAdditions::syncMessageTypeToScummVMUsingDefaultStrategy(const int index, const reg_t value) {
if (index == kGlobalVarMessageType) {
// ScummVM audio options haven't been applied yet. Use this set call
// as a trigger to apply defaults from ScummVM, ignoring the default
// value that was just received from the game scripts
if (!_messageTypeSynced || _state->variables[VAR_GLOBAL][kGlobalVarQuit] == TRUE_REG) {
_messageTypeSynced = true;
syncAudioOptionsFromScummVM();
return;
}
ConfMan.setBool("subtitles", value.toSint16() & kMessageTypeSubtitles);
ConfMan.setBool("speech_mute", !(value.toSint16() & kMessageTypeSpeech));
}
}
reg_t reg_t::operator%(const reg_t right) const {
if (isNumber() && right.isNumber() && !right.isNull()) {
// Support for negative numbers was added in Iceman, and perhaps in
// SCI0 0.000.685 and later. Theoretically, this wasn't really used
// in SCI0, so the result is probably unpredictable. Such a case
// would indicate either a script bug, or a modulo on an unsigned
// integer larger than 32767. In any case, such a case should be
// investigated, instead of being silently accepted.
if (getSciVersion() <= SCI_VERSION_0_LATE && (toSint16() < 0 || right.toSint16() < 0))
warning("Modulo of a negative number has been requested for SCI0. This *could* lead to issues");
int16 value = toSint16();
int16 modulo = ABS(right.toSint16());
int16 result = value % modulo;
if (result < 0)
result += modulo;
return make_reg(0, result);
} else
return lookForWorkaround(right, "modulo");
}
reg_t reg_t::operator/(const reg_t right) const {
if (isNumber() && right.isNumber() && !right.isNull())
return make_reg(0, toSint16() / right.toSint16());
else
return lookForWorkaround(right, "division");
}
reg_t reg_t::operator*(const reg_t right) const {
if (isNumber() && right.isNumber())
return make_reg(0, toSint16() * right.toSint16());
else
return lookForWorkaround(right, "multiplication");
}
void GuestAdditions::syncTextSpeedToScummVM(const int index, const reg_t value) const {
if (index == kGlobalVarTextSpeed) {
ConfMan.setInt("talkspeed", (8 - value.toSint16()) * 255 / 8);
}
}