void VarNameDecl(model2mbed.TypeDecl type)
{
string name; model2mbed.Expression arg1 = null, arg2 = null;
Ident(out name);
model2mbed.VarDecl vardecl = new model2mbed.VarDecl(name, type); decls.Add(vardecl);
if (la.kind == 11)
{
Get();
Expression(out arg1);
Expect(12);
int low = 0, length = 0;
if (!decls.getArrSizeValue(arg1, out low, out length))
{
throw new FatalError("Could not calculate array size!");
}
vardecl.IsArray = true;
vardecl.ArrLow = low;
vardecl.ArrLength = length;
}
if (la.kind == 13)
{
Get();
Expression(out arg2);
vardecl.Expr = arg2; vardecl.HasExpr = true;
}
}
public bool getVarValue(string varname, out int val)
{
val = 0;
VarDecl res = getVar(varname);
if (res == null)
{
throw new ParseException(String.Format("Value '{0}': unknown!", varname));
}
if (res.IsArray)
{
throw new ParseException(String.Format("Value '{0}': Indexers not yet support on consts!", varname));
}
if (res.Type.Type != VarType.Int)
{
throw new ParseException(String.Format("Value '{0}': Only integer values can be used right now!", varname));
}
if (!res.HasExpr)
{
throw new ParseException(String.Format("Value '{0}': not initialized!", varname));
}
return(getExprValue(res.Expr, out val));
}
public string generate(UpdateRule ur)
{
VarDecl vd = _decls.getVar(ur.VarName);
if (vd == null)
{
throw new Exception(String.Format("Unknown variable {0}!", ur.VarName));
}
string vname;
if (vd.IsArray)
{
if (ur.Expr.Type != Expression.ExpType.Func ||
ur.Expr.Func != Expression.Funcs.ArrayIndex ||
ur.Expr.First.Type != Expression.ExpType.Var)
{
throw new Exception(String.Format("Array variable {0} not accessed by index!", vd.Name));
}
vd = _decls.getVar(ur.Expr.First.Var);
vname = String.Format("{0}[{1}]", _namer(vd), generate(ur.Expr.Second));
}
else
{
vname = _namer(vd);
}
return(String.Format("{0}.{1} = ({2});",
_stateStructName,
vname,
generate(ur.Expr)));
}
private Rule parseUpdateRule(string pname, string rule, Declarations decls)
{
int len = 1;
int equal = rule.IndexOf(":=");
if (equal < 0)
{
equal = rule.IndexOf('=');
}
else
{
len = 2;
}
if (equal < 0)
{
throw new ParseException(String.Format("Invalid update rule '{0}'!", rule));
}
string varname = rule.Substring(0, equal).Trim();
string upexpr = rule.Substring(equal + len).Trim();
VarDecl vd = decls.getVar(varname);
if (vd == null)
{
throw new ParseException(String.Format("Unknown variable {0}!", varname));
}
string expr = String.Format("int _UPDATE_{0} = {1};", varname, upexpr);
Declarations newdecls = parseDeclarations(expr, decls);
Expression e = newdecls.getFirstDecl().Expr;
return(new UpdateRule(varname, e));
}
private void FormatSingleVarDeclaration(string typestr, string prefix, VarDecl vd)
{
string arpostfix = getArraryDecl(vd);
string name = setUniqueName(vd, String.Format("{0}_{1}_{2}{3}", typestr, prefix, vd.Name, arpostfix));
app(" {0}{1} {2};", vd.Type.Const ? "const " : "", typestr, name);
}
private void FormatChannel(string template, VarDecl v, string name, string postfix)
{
if (_isSource)
{
app("SYNCHRONIZATION_CHANNEL_STATE {0}{1}_STATE; // {2}", name, postfix, v.NiceName());
app();
app("const SYNCHRONIZATION_CHANNEL_DATA {0}{1}_DATA = // {2}", name, postfix, v.NiceName());
app(" {{");
app(" DBGSTR(\"{0}[{1}]\"), // name", v.NiceName(), postfix.TrimStart('_'));
app(" {0}, // urgent", formatBool(v.Type.Urgent));
app(" {0}, // broadcast", formatBool(v.Type.Broadcast));
app(" &{0}, // state", String.Format("{0}{1}_STATE", name, postfix));
app(" }};");
app();
app("SYNCHRONIZATION_CHANNEL {0}{1} = // {2}", name, postfix, v.NiceName());
app(" {{");
app(" &{0}{1}_DATA, // data", name, postfix);
app(" NULL, // fired");
app(" NULL, // context");
app(" }};");
app();
}
else
{
app("extern ModelImpl::SYNCHRONIZATION_CHANNEL {0}{1}; // {2}", name, postfix, v.NiceName());
}
}
private void FormatChannel(string template, VarDecl v)
{
string name = getVarDeclName(v, template);
if (v.IsArray)
{
for (int i = v.ArrLow; i < (v.ArrLow + v.ArrLength); ++i)
{
FormatChannel(template, v, name, String.Format("_{0}", i));
}
if (_isSource)
{
app();
app("ModelImpl::SYNCHRONIZATION_CHANNEL* const {0}_ARRAY[] = ", name);
app(" {{");
for (int i = v.ArrLow; i < (v.ArrLow + v.ArrLength); ++i)
{
app(" &{0}{1},", name, String.Format("_{0}", i));
}
app(" NULL");
app(" }};");
app();
}
}
else
{
FormatChannel(template, v, name, "");
}
}
public TypeDecl GetType(Declarations symtab)
{
switch (Type)
{
case ExpType.Const:
return(new TypeDecl()
{
Type = VarType.Int
});
case ExpType.Var:
VarDecl v = symtab.getVar(Var);
if (v == null)
{
throw new ParseException(String.Format("Unknown variable {0}", Var));
}
return(v.Type);
case ExpType.Func:
// this should be improved later
return(new TypeDecl()
{
Type = VarType.Int
});
default:
throw new ParseException("Internal error 1");
}
}
private static string getArraryDecl(VarDecl vd)
{
string postfix = "";
if (vd.IsArray)
{
postfix = String.Format("[{0}]", vd.ArrLength);
}
return(postfix);
}
private string getVarDeclName(VarDecl v, string template)
{
string name;
if (_names.TryGetValue(v, out name))
{
return(name);
}
return(setUniqueName(v, String.Format("{0}_CHANNEL_VAR_{1}", template, v.Name)));
}
public VarDecl getVar(string name)
{
VarDecl vdef = _vdefs.SingleOrDefault(var => var.Name == name);
if (vdef != null)
{
return(vdef);
}
if (Parent != null)
{
return(Parent.getVar(name));
}
return(null);
}
public VarWithScope getVarWithScope(string name)
{
VarDecl vdef = _vdefs.SingleOrDefault(var => var.Name == name);
if (vdef != null)
{
return new VarWithScope()
{
var = vdef, decl = this
}
}
;
if (Parent != null)
{
return(Parent.getVarWithScope(name));
}
return(null);
}
private void FormatSingleVarInitialization(VarDecl vd, Declarations decl)
{
string name = getUniqueName(vd);
if (!vd.HasExpr)
{
return;
}
int val;
if (!decl.getExprValue(vd.Expr, out val))
{
throw new Exception(String.Format("Cannot use non const variable!"));
}
app(" {0}({1}),", name, val);
}
public void Add(VarDecl vdecl)
{
verifyCleanName(vdecl.Name);
_vdefs.Add(vdecl);
}
public void removeVar(VarDecl vd)
{
_vdefs.Remove(vd);
}