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with Except;
with Screen_Output; use Screen_Output;
with Stack;
with Tokens; use Tokens;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Command_Line; use Ada.Command_Line;
procedure Sdc is
File : File_Type;
begin
Msg ("Welcome to sdc. Go ahead type your commands ...");
if Argument_Count = 1 then
begin
Open (File, In_File, Argument (1));
exception
when Use_Error | Name_Error =>
Error_Msg ("Could not open input file, exiting.");
return;
end;
Set_Input (File);
end if;
loop
-- Open a block to catch Stack Overflow and Underflow exceptions.
begin
Process (Next);
-- Read the next Token from the input and process it.
exception
when Stack.Underflow =>
Error_Msg ("Not enough values in the Stack.");
when Stack.Overflow =>
null;
end;
end loop;
exception
when Except.Exit_SDC =>
Msg ("Thank you for using sdc.");
when others =>
Msg ("*** Internal Error ***.");
end Sdc;
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