removed parameter passing of globals and fixed expression evaluator some

This commit is contained in:
Samuel D. Crow
2021-03-13 16:49:58 -06:00
parent 43319754a8
commit 4b2b567a42
5 changed files with 532 additions and 476 deletions

View File

@@ -170,369 +170,3 @@ void compile()
shutDown();
}
/* methods for operands */
static void operands::dumpVars(ostream &out)
{
out << "Global Variables\n";
for(auto iter=globals.begin(); iter!=globals.end(); ++iter)
{
out << "variable " << iter->first << " has ID " << iter->second << "\n";
}
out << endl;
}
unsigned int operands::getOrCreateStr(ostream &k, string &s)
{
auto iter=constStr.find(s);
if (iter!=constStr.end()) return iter->second;
++nextID;
k << "const string k" << nextID << "=\"" << s << "\";\n";
constStr[s]=nextID;
return nextID;
}
unsigned int operands::createConst(ostream &k, string &s, enum TYPES t)
{
operands *me=new operands(t);
if (t==T_INT)
{
k << "const int k";
}
else
{
if (t==T_FLOAT)
{
k << "const double k";
}
else
{
errorLevel=E_TYPE_MISMATCH;
exit(1);
}
}
k << me->getID() << "=" << s << ";\n";
return me;
}
enum TYPES operands::getSimpleVarType()
{
switch type
{
case T_FLOAT:
case T_FLOATCALL_ARRAY:
case T_FLOATVAR:
return T_FLOATVAR;
case T_INT:
case T_INTCALL_ARRAY:
case T_INTVAR:
return T_INTVAR;
case T_STRING:
case T_STRINGCALL_ARRAY:
case T_STRINGVAR:
return T_STRINGVAR;
}
return T_NONE;
}
enum TYPES operands::coerceTypes()
{
if this->isBinOp()
{
if (l->getSimpleVarType()==T_INTVAR && r->getSimpleVarType()==T_FLOATVAR)
{
/* promote l to float */
t=T_FLOATVAR;
break;
}
if (l->getSimpleVarType()==T_FLOAT && r->getSimpleVarType()==T_INT)
{
/* promote r to float */
t=T_FLOATVAR;
break;
}
if (l->getSimpleVarType()==r->getSimpleVarType())
{
break;
}
errorLevel=E_TYPE_MISMATCH;
exit(1);
}
else
{
if (t==T_NONE)
{
errorLevel=E_TYPE_MISMATCH;
}
}
}
/* operands used by expression parser and variables */
operands::operands(enum TYPES t)
{
this->id = ++nextID;
this->type=t;
}
void operands::generateBox(ostream &out)
{
switch (this->getSimpleVarType())
{
case T_INTVAR:
out << "int v";
break;
case T_FLOATVAR:
out << "double v";
break;
case T_STRINGVAR:
out << "string v";
break;
default:
errorLevel=E_TYPE_MISMATCH;
exit(1);
break;
}
out << this->getID() << ";\n";
}
operands *operands::getOrCreateGlobal(ostream &heap, string &s, enum TYPES t)
{
operands op*=operands::globals->find(s);
if (op==globals.end())
{
op=new variable(heap, s, t);
}
return op;
}
void operands::boxName(ostream &out)
{
switch (this->getType())
{
case T_STRINGVAR:
case T_INTVAR:
case T_FLOATVAR:
break;
default:
errorLevel=E_INTERNAL;
exit(1);
break;
}
out << "v" << this->getID();
}
/* expression parsing routines */
/* binary vs. unary ops */
bool expression::isBinOp()
{
switch this->getOp()
{
case O_NEGATE:
case O_NOT:
case O_INVERT:
return false;
break;
}
return true;
}
operands *expression::evaluate(ostream &scope, ostream &output_cpp)
{
operands *l, *r;
if (this->getOp()==O_TERM) return op;
l=this->getLeft()->evaluate();
enum TYPES t=this->coerceTypes();
l->getSimpleVarType();
r=(this->isBinOp()?this->getRight()->evaluate():NULL);
switch (this->getOp())
{
case O_INVERT:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "= ~" << l->boxName() << ";\n";
break;
case O_NEGATE:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "= -" << l->boxName() << ";\n";
break;
case O_NOT:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "= !" << l->boxName() << ";\n";
break;
/* TODO: Check for divide by zero error and modulo zero error */
case O_REMAINDER:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "%" << r->boxName() << ";\n";
break;
case O_DIVIDE:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "/" << r->boxName() << ";\n";
break;
case O_PLUS:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "+" << r->boxName() << ";\n";
break;
case O_MINUS:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "-" << r->boxName() << ";\n";
break;
case O_MULTIPLY:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "*" << r->boxName() << ";\n";
break;
case O_OR:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "|" << r->boxName() << ";\n";
break;
case O_AND:
this->op=new operands(t);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=" << l->boxName() << "&" << r->boxName() << ";\n";
break;
case O_GREATER:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << ">" << r->boxName() << ")?-1:0;\n";
break;
case O_LESS:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << "<" << r->boxName() << ")?-1:0;\n";
break;
case O_GREATER_EQUAL:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << ">=" << r->boxName() << ")?-1:0;\n";
break;
case O_LESS_EQUAL:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << "<=" << r->boxName() << ")?-1:0;\n";
break;
case O_EQUAL:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << "==" << r->boxName() << ")?-1:0;\n";
break;
case O_UNEQUAL:
this->op=new operands(T_INTVAR);
this->op->generateBox(scope);
output_cpp << this->op->boxName() << "=(" << l->boxName() << "!=" << r->boxName() << ")?-1:0;\n";
break;
default:
errorLevel=E_INTERNAL;
exit(1);
break;
}
delete this->left;
this->left=NULL;
if (this->isBinOp())
{
delete this->right;
this->right=NULL;
}
this->oper=O_TERM;
return this->op;
}
expression::~expression()
{
if(this->getOp()==O_TERM)
{
delete this->op;
}
else
{
delete this->left;
if (this->isBinOp())
{
delete this->right;
}
}
}
/* variable definitions */
variable::variable(ostream &scope, string &name, enum TYPES t):operands(t)
{
this->generateBox(scope);
}
variable *variable::getOrCreateVarName(ostream &func, ostream &heap, string &name, enum TYPES t)
{
variable *v;
if (!scopeGlobal)
{
fn *currentFunc=fn::getCurrentSub();
v=fn::getOrCreateVar(func, heap, t, name, false);
return v;
}
return reinterpret_cast<variable *>operands::getOrCreateGlobal(heap, name);
}
void variable::assignment(expression *value)
{
operands *op=value->evaluate();
enum TYPES t=op->getSimpleVarType();
switch (this->getType())
{
case T_FLOATVAR:
if (t==T_INTVAR)
{
/* TODO: convert int to float */
}
else
{
if (t!=T_FLOATVAR)
{
errorLevel=E_TYPE_MISMATCH;
exit(1);
}
}
break;
default:
if (t!=this->getType())
{
errorLevel=E_TYPE_MISMATCH;
exit(1);
}
break;
}
this->boxName(output_cpp);
output_cpp << "=";
op->boxName(output_cpp);
output_cpp << ";\n";
}
/* function definitions */
fn *fn::getCurrentSub()
{
return callStack.back;
}
void fn::generateOnNSub(ostream &out, expression *e)
{
this->ret=new label();
fn::callStack.push_back(this);
label::generateOnNTo(out, e);
out << "case " << ret->getID() << ":\n";
}
void fn::generateGosub(ostream &out, shared_ptr<label> sub)
{
this->ret=new label();
fn::callStack.push_back(this);
out << "state=" << sub->getID() << ";\nbreak;\n";
out << "case " << ret->getID() << ":\n";
}