void ItemSpace::checkPreferredPositions()
{
for (int groupId = 0; groupId < m_groups.size(); groupId++) {
ItemGroup &group = m_groups[groupId];
for (int itemId = 0; itemId < group.m_groupItems.size(); itemId++) {
ItemSpaceItem &item = group.m_groupItems[itemId];
qreal push;
PushPower power;
/*
Push items back towards their perferred positions.
Cannot push items out of the working area,
cannot push items away from their preferred positions.
*/
if (item.pushBack) {
QRectF preferredGeometry = QRectF(item.preferredPosition, item.lastGeometry.size());
// left/right
push = preferredGeometry.left() - item.lastGeometry.left();
if (push > 0) {
performPush(groupId, DirRight, push, NoPower);
} else if (push < 0) {
performPush(groupId, DirLeft, -push, NoPower);
}
// up/down
push = preferredGeometry.top() - item.lastGeometry.top();
if (push > 0) {
performPush(groupId, DirDown, push, NoPower);
} else if (push < 0) {
performPush(groupId, DirUp, -push, NoPower);
}
}
}
}
}
/*
* This code is used to execute each instruction.
*/
void executeOneInstruction(int instr) {
int X, Y, flagX1, flagX2, flagY1, flagY2, operation;
char string[WORD_SIZE];
bzero(string, 16);
switch (instr) {
case START:
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR); //increment IP
break;
case MOV: //1st phase:get the value 2nd phase:store the value
X = yylex();
flagX1 = yylval.flag;
flagX2 = yylval.flag2;
Y = yylex();
flagY1 = yylval.flag;
flagY2 = yylval.flag2;
strcpy(string, yylval.data);
if (!performMOV(X, flagX1, flagX2, Y, flagY1, flagY2, string)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case ARITH:
operation = yylval.flag;
X = yylex();
flagX1 = yylval.flag;
if (operation != INR && operation != DCR) {
Y = yylex();
flagY1 = yylval.flag;
}
if (!performArithmetic(X, flagX1, Y, flagY1, operation)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case LOGIC:
operation = yylval.flag;
X = yylex();
flagX1 = yylval.flag;
Y = yylex();
flagY1 = yylval.flag;
if (!performLogic(X, flagX1, Y, flagY1, operation)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case BRANCH:
operation = yylval.flag;
X = yylex();
flagX1 = yylval.flag;
if (operation != JMP) {
Y = yylex();
flagY1 = yylval.flag;
}
if (!performBranching(X, flagX1, Y, flagY1, operation)) return;
break;
case PUSH:
X = yylex();
flagX1 = yylval.flag;
if (!performPush(X, flagX1)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case POP:
X = yylex();
flagX1 = yylval.flag;
if (!performPop(X, flagX1)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case CALL:
X = yylex();
flagX1 = yylval.flag;
if (!performCall(X, flagX1)) return;
break;
case RET:
if (!performRet()) return;
break;
case INT:
X = yylex();
flagX1 = yylval.flag;
if (!performINT(X, flagX1)) return;
break;
case IRET:
if (!performIRET()) return;
break;
case IN:
X = yylex();
flagX1 = yylval.flag;
if (!performIN(X, flagX1)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case OUT:
X = yylex();
flagX1 = yylval.flag;
if (!performOUT(X, flagX1)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case LOAD:
case STORE:
X = yylex();
flagX1 = yylval.flag;
Y = yylex();
flagY1 = yylval.flag;
if (!performLoadStore(X, flagX1, Y, flagY1, instr)) return;
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
case HALT:
if (mode == USER_MODE) {
raiseException(newException(EX_ILLINSTR, "Call to Privileged Instruction HALT in USER mode", 0));
return;
}
printf("Machine is halting\n");
exit(0);
break;
case END:
break;
case BRKP:
if (isDebugModeOn()) {
step_flag = 1;
printf("\nXSM Debug Environment\nType \"help\" for getting a list of commands\n");
}
storeInteger(reg[IP_REG], getInteger(reg[IP_REG]) + WORDS_PER_INSTR);
break;
default:
raiseException(newException(EX_ILLINSTR, "Illegal Instruction", 0));
return;
}
}
void ItemSpace::checkBorders()
{
for (int groupId = 0; groupId < m_groups.size(); groupId++) {
ItemGroup &group = m_groups[groupId];
for (int itemId = 0; itemId < group.m_groupItems.size(); itemId++) {
ItemSpaceItem &item = group.m_groupItems[itemId];
qreal push;
PushPower power;
/*
Push items intersecting working area borders inside.
For borders adjunct to the corner of alignment, allow pushing
over the opposite border (and items there may be temporarily placed).
*/
// left border
push = screenSpacing - item.lastGeometry.left();
if (push > 0) {
item.animateMovement = true;
power = PushAwayFromPreferred;
if ((spaceAlignment & Qt::AlignLeft)) {
power |= PushOverBorder;
}
performPush(groupId, DirRight, push, power);
}
// right border
push = item.lastGeometry.right()+screenSpacing - workingGeom.width();
if (push > 0) {
item.animateMovement = true;
power = PushAwayFromPreferred;
if ((spaceAlignment & Qt::AlignRight)) {
power |= PushOverBorder;
}
performPush(groupId, DirLeft, push, power);
}
// top border
push = screenSpacing - item.lastGeometry.top();
if (push > 0) {
item.animateMovement = true;
power = PushAwayFromPreferred;
if ((spaceAlignment & Qt::AlignTop)) {
power |= PushOverBorder;
}
performPush(groupId, DirDown, push, power);
}
// bottom border
push = item.lastGeometry.bottom()+screenSpacing - workingGeom.height();
if (push > 0) {
item.animateMovement = true;
power = PushAwayFromPreferred;
if ((spaceAlignment & Qt::AlignBottom)) {
power |= PushOverBorder;
}
performPush(groupId, DirUp, push, power);
}
}
}
}
