System Procedures Insert and Delete

These functions process system procedures Insert and Delete. The first function processes system procedure Insert.

Function Proc_Insert: Word; Far;
Var SubString, StringVariable, Position: TExpression;
begin
  ExpectTokenAndGetNext (Token_LeftParenthesis);
  SubString.ExpectAndStoreStringAndPushPointer;
  ExpectTokenAndGetNext (Token_Comma);
  StringVariable.ExpectStringVariable;
  StringVariable.PushArrayPointerAndHighestIndex;
  ExpectTokenAndGetNext (Token_Comma);
  With Position do
    begin
      ExpectIntegerExpression;
      CheckOrdinalRange (Ptr (SystemUnitSegment, Integer_TypeOffset));
      PushExpression;
    end;
  ExpectTokenAndGetNext (Token_RightParenthesis);
  StoreCode_icGoSub (SubString.IntermediateCodeOffset);
  StoreCode_icGoSub (StringVariable.IntermediateCodeOffset);
  StoreCode_icGoSub (Position.IntermediateCodeOffset);
  GenerateInstruction_CALL_FAR (SysProc_SInsert);
  Proc_Insert := EndSubroutine;
end;

This function processes system procedure Delete.

Function Proc_Delete: Word; Far;
Var StringVariable, Index, Count: TExpression;
begin
  ExpectTokenAndGetNext (Token_LeftParenthesis);
  StringVariable.ExpectStringVariable;
  ExpectTokenAndGetNext (Token_Comma);
  With Index do
    begin
      ExpectIntegerExpression;
      CheckOrdinalRange (Ptr (SystemUnitSegment, Integer_TypeOffset));
      PushExpression;
    end;
  ExpectTokenAndGetNext (Token_Comma);
  With Count do
    begin
      ExpectIntegerExpression;
      CheckOrdinalRange (Ptr (SystemUnitSegment, Integer_TypeOffset));
      PushExpression;
    end;
  ExpectTokenAndGetNext (Token_RightParenthesis);
  StoreCode_icGoSub (StringVariable.IntermediateCodeOffset);
  StoreCode_icGoSub (Index.IntermediateCodeOffset);
  StoreCode_icGoSub (Count.IntermediateCodeOffset);
  GenerateInstruction_CALL_FAR (SysProc_SDelete);
  Proc_Delete := EndSubroutine;
end;