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top - downloadIndex: ┃ B T ┃
Length: 8222 (0x201e)
Types: TextFile
Names: »B«
└─⟦afbc8121e⟧ Bits:30000532 8mm tape, Rational 1000, MC68020_OS2000 7_2_2
└─ ⟦77aa8350c⟧ »DATA«
└─⟦f794ecd1d⟧
└─⟦4c85d69e2⟧
└─⟦this⟧
-- The use of this system is subject to the software license terms and
-- conditions agreed upon between Rational and the Customer.
--
-- Copyright 1988 by Rational.
--
-- RESTRICTED RIGHTS LEGEND
--
-- Use, duplication, or disclosure by the Government is subject to
-- restrictions as set forth in subdivision (b)(3)(ii) of the Rights in
-- Technical Data and Computer Software clause at 52.227-7013.
--
--
-- Rational
-- 3320 Scott Boulevard
-- Santa Clara, California 95054-3197
--
-- PROPRIETARY AND CONFIDENTIAL INFORMATION OF RATIONAL;
-- USE OR COPYING WITHOUT EXPRESS WRITTEN AUTHORIZATION
-- IS STRICTLY PROHIBITED. THIS MATERIAL IS PROTECTED AS
-- AN UNPUBLISHED WORK UNDER THE U.S. COPYRIGHT ACT OF
-- 1976. CREATED 1988. ALL RIGHTS RESERVED.
--
--
with Primitive_Io; -- For debugging only
separate (Common_Text_Io)
procedure Get_A_Line (File : in File_Type;
S : in out Input_State;
Item : out String;
Last : out Natural;
Skip_Terminators : in Boolean;
End_Of_Line : out Boolean;
End_Of_Page : out Boolean;
End_Of_File : out Boolean) is
C : Character;
Item_Pos : Integer;
Item_First : constant Integer := Item'First;
Item_Last : constant Integer := Item'Last;
Item_Length : constant Integer := Item'Length;
B : Buffering.Data_Buffer := Dio.Get (File);
-- procedure Pput (S : in String;
-- Absorb_Output : Boolean :=
-- Primitive_Io.Global_Absorb_Output)
-- renames Primitive_Io.Put_Line;
begin
--if not Primitive_Io.Absorb_Output then
-- Pput ("Cti.Get_A_Line, Skip_Terminators = " &
-- Boolean'Image (Skip_Terminators));
--end if;
-- Set the out parameters to the expected case for most calls
-- adjust for Item too short or appropriate terminator
End_Of_Line := True;
End_Of_Page := False;
End_Of_File := False;
-- Get rid of do-nothing case
if Item'Length = 0 then
-- Pput ("Cti.Get_A_Line do-nothing case");
End_Of_Line := False;
Last := Item'First - 1;
return;
end if;
-- Make sure there is some stuff in the buffer to start with
Next_Buffer (File, S, B);
--if not Primitive_Io.Absorb_Output then
-- Pput ("Cti.Get_A_Line have stuff in the buffer");
-- Pput ("Cti.Get_A_Line S.Eob_Is_Eol = " & Boolean'Image (S.Eob_Is_Eol));
--end if;
-- Try the "block copy" case first
if S.Eob_Is_Eol then
-- Have exactly one line in the buffer
-- Pput ("Cti.Get_A_Line have exactly one line in the buffer");
declare
-- Don't count the line terminator, which is present
Left : constant Natural := Buffering.Left (B) - 1;
begin
if Item_Length < Left then
-- Item can't hold entire line
-- Pput ("Cti.Get_A_Line item can't hold entire line");
Buffering.Next (B, Item);
Last := Item'Last;
End_Of_Line := False;
return;
else
-- Item can hold the entire line
-- Pput ("Cti.Get_A_Line item can hold the entire line");
Buffering.Next (B, Item (Item_First .. Item_First + Left - 1));
Item_Pos := Item_First + Left - 1;
end if;
end;
else
-- Pput ("Cti.Get_A_Line don't have exactly one line in the buffer");
Item_Pos := Item_First - 1;
end if;
-- Here, Item_Pos is the index of the last location already filled
-- (if any)
while Item_Pos < Item_Last loop
--if not Primitive_Io.Absorb_Output then
--Pput ("Cti.Get_A_Line still filling the buffer, Item_Pos =" &
-- Integer'Image (Item_Pos) & ", Item_Last =" &
-- Integer'Image (Item_Last));
--end if;
if Buffering.Is_Empty (B) then
if S.Eof_Encountered = True then
-- Since EOF_Encountered = True BEFORE the call to
-- Fill_Buffer, some other operation has consumed the
-- simulated line terminator, and we are bumping into the
-- simulated file terminator. Thus, we raise End_Error.
-- (Note that we are allowing ourselves to be fooled by
-- Simulated_False here.)
raise End_Error;
end if;
Fill_Buffer (File, S, B);
if S.Eof_Encountered = True then
-- We have just seen EOF_Encountered change from False to
-- True, so we are the first to bump into the end of the
-- file. We let the simulated line terminator terminate
-- the string we are reading. This is the end of a line,
-- page, and file.
Last := Item_Pos;
End_Of_Page := True;
End_Of_File := True;
return;
end if;
end if;
-- Pput ("Cti.Get_A_Line peeking at next character");
C := Buffering.Peek (B);
-- Pput ("Cti.Get_A_Line peek at next " & Character'Image (C));
-- for I in B.Tail .. B.Head loop
-- Pput ("Cti.Get_A_Line buffer is " &
-- Integer'Image (Integer (B.Buffer (I))));
-- end loop;
case C is
when Line_Terminator =>
if Skip_Terminators then
-- Pput ("Cti.Get_A_Line skipping Line_Terminator");
Buffering.Consume (B, 1);
New_Line (S);
else
-- Don't skip the line_terminator
-- Pput ("Cti.Get_A_Line ignoring a Line_Terminator");
null;
end if;
Last := Item_Pos;
return;
when Page_Terminator =>
if Skip_Terminators then
-- Pput ("Cti.Get_A_Line skipping Page_Terminator");
Buffering.Consume (B, 1);
C := Buffering.Peek (B);
if C = Line_Terminator then
Buffering.Consume (B, 1);
-- else
--Pput
-- ("Cti.Get_A_Line - Page Term with no Line Term");
end if;
End_Of_Page := True;
New_Page (S);
else
-- Don't skip the page_terminator
-- Pput ("Cti.Get_A_Line ignoring a Page_Terminator");
null;
end if;
Last := Item_Pos;
return;
when others =>
-- if not Primitive_Io.Absorb_Output then
-- Pput ("Cti.Get_A_Line racking up a '" & C & ''');
-- end if;
Buffering.Consume (B, 1);
Item_Pos := Item_Pos + 1;
Item (Item_Pos) := C;
end case;
end loop;
-- If control comes here, we have filled the user's string
-- completely before bumping into a terminator.
-- Pput ("Cti.Get_A_Line filled user's string before finding terminator");
Last := Item_Pos;
End_Of_Line := False;
-- If the terminators are supposed to be skipped, and the
-- next character is a terminator, then we skip it now.
-- (Reason: It makes TEXT_IO work better when reading
-- a string of fixed length lines into a string of the
-- same length.)
-- Unfortunately, what with CE3604A and AI-00050, we aren't allowed
-- to do this. If the user supplies a buffer of exactly the right
-- size he is obliged to call Skip_Line himself after every call to
-- Get_Line to fill it.
-- One question: What should End_Of_Line, etc. be here? Answer:
-- Unreliable.
end Get_A_Line;