[thirdparty/gcc.git] / gcc / ada / libgnat / a-suteio.adb

------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--         A D A . S T R I N G S . U N B O U N D E D . T E X T _ I O        --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1997-2020, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Text_IO; use Ada.Text_IO;

package body Ada.Strings.Unbounded.Text_IO is

   --------------
   -- Get_Line --
   --------------

   function Get_Line return Unbounded_String is
      Buffer : String (1 .. 1000);
      Last   : Natural;
      Str1   : String_Access;
      Str2   : String_Access;
      Result : Unbounded_String;

   begin
      Get_Line (Buffer, Last);
      Str1 := new String'(Buffer (1 .. Last));
      while Last = Buffer'Last loop
         Get_Line (Buffer, Last);
         Str2 := new String (1 .. Str1'Last + Last);
         Str2 (Str1'Range) := Str1.all;
         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
         Free (Str1);
         Str1 := Str2;
      end loop;

      Result.Reference := Str1;
      Result.Last      := Str1'Length;
      return Result;
   end Get_Line;

   function Get_Line (File : Ada.Text_IO.File_Type) return Unbounded_String is
      Buffer : String (1 .. 1000);
      Last   : Natural;
      Str1   : String_Access;
      Str2   : String_Access;
      Result : Unbounded_String;

   begin
      Get_Line (File, Buffer, Last);
      Str1 := new String'(Buffer (1 .. Last));
      while Last = Buffer'Last loop
         Get_Line (File, Buffer, Last);
         Str2 := new String (1 .. Str1'Last + Last);
         Str2 (Str1'Range) := Str1.all;
         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
         Free (Str1);
         Str1 := Str2;
      end loop;

      Result.Reference := Str1;
      Result.Last      := Str1'Length;
      return Result;
   end Get_Line;

   procedure Get_Line (Item : out Unbounded_String) is
   begin
      Get_Line (Current_Input, Item);
   end Get_Line;

   procedure Get_Line
     (File : Ada.Text_IO.File_Type;
      Item : out Unbounded_String)
   is
   begin
      --  We are going to read into the string that is already there and
      --  allocated. Hopefully it is big enough now, if not, we will extend
      --  it in the usual manner using Realloc_For_Chunk.

      --  Make sure we start with at least 80 characters

      if Item.Reference'Last < 80 then
         Realloc_For_Chunk (Item, 80);
      end if;

      --  Loop to read data, filling current string as far as possible.
      --  Item.Last holds the number of characters read so far.

      Item.Last := 0;
      loop
         Get_Line
           (File,
            Item.Reference (Item.Last + 1 .. Item.Reference'Last),
            Item.Last);

         --  If we hit the end of the line before the end of the buffer, then
         --  we are all done, and the result length is properly set.

         if Item.Last < Item.Reference'Last then
            return;
         end if;

         --  If not enough room, double it and keep reading

         Realloc_For_Chunk (Item, Item.Last);
      end loop;
   end Get_Line;

   ---------
   -- Put --
   ---------

   procedure Put (U : Unbounded_String) is
   begin
      Put (U.Reference (1 .. U.Last));
   end Put;

   procedure Put (File : File_Type; U : Unbounded_String) is
   begin
      Put (File, U.Reference (1 .. U.Last));
   end Put;

   --------------
   -- Put_Line --
   --------------

   procedure Put_Line (U : Unbounded_String) is
   begin
      Put_Line (U.Reference (1 .. U.Last));
   end Put_Line;

   procedure Put_Line (File : File_Type; U : Unbounded_String) is
   begin
      Put_Line (File, U.Reference (1 .. U.Last));
   end Put_Line;

end Ada.Strings.Unbounded.Text_IO;
Commit	Line	Data
d23b8f57 RK	1	------------------------------------------------------------------------------
d23b8f57 RK	2	-- --
3084fecd	3	-- GNAT RUN-TIME COMPONENTS --
d23b8f57 RK	4	-- --
	5	-- A D A . S T R I N G S . U N B O U N D E D . T E X T _ I O --
	6	-- --
	7	-- B o d y --
	8	-- --
4b490c1e	9	-- Copyright (C) 1997-2020, Free Software Foundation, Inc. --
d23b8f57 RK	10	-- --
	11	-- GNAT is free software; you can redistribute it and/or modify it under --
	12	-- terms of the GNU General Public License as published by the Free Soft- --
748086b7	13	-- ware Foundation; either version 3, or (at your option) any later ver- --
d23b8f57 RK	14	-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
d23b8f57 RK	15	-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
748086b7 JJ	16	-- or FITNESS FOR A PARTICULAR PURPOSE. --
	17	-- --
	18	-- As a special exception under Section 7 of GPL version 3, you are granted --
	19	-- additional permissions described in the GCC Runtime Library Exception, --
	20	-- version 3.1, as published by the Free Software Foundation. --
	21	-- --
	22	-- You should have received a copy of the GNU General Public License and --
	23	-- a copy of the GCC Runtime Library Exception along with this program; --
	24	-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
	25	-- <http://www.gnu.org/licenses/>. --
d23b8f57 RK	26	-- --
d23b8f57 RK	27	-- GNAT was originally developed by the GNAT team at New York University. --
71ff80dc	28	-- Extensive contributions were provided by Ada Core Technologies Inc. --
d23b8f57 RK	29	-- --
	30	------------------------------------------------------------------------------
	31
798a9055	32	with Ada.Text_IO; use Ada.Text_IO;
d23b8f57 RK	33
	34	package body Ada.Strings.Unbounded.Text_IO is
	35
	36	--------------
	37	-- Get_Line --
	38	--------------
	39
	40	function Get_Line return Unbounded_String is
	41	Buffer : String (1 .. 1000);
	42	Last : Natural;
	43	Str1 : String_Access;
	44	Str2 : String_Access;
	45	Result : Unbounded_String;
	46
	47	begin
	48	Get_Line (Buffer, Last);
	49	Str1 := new String'(Buffer (1 .. Last));
d23b8f57 RK	50	while Last = Buffer'Last loop
d23b8f57 RK	51	Get_Line (Buffer, Last);
cfd71216 VC	52	Str2 := new String (1 .. Str1'Last + Last);
	53	Str2 (Str1'Range) := Str1.all;
	54	Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
d23b8f57 RK	55	Free (Str1);
	56	Str1 := Str2;
	57	end loop;
	58
798a9055 RD	59	Result.Reference := Str1;
798a9055 RD	60	Result.Last := Str1'Length;
d23b8f57 RK	61	return Result;
	62	end Get_Line;
	63
	64	function Get_Line (File : Ada.Text_IO.File_Type) return Unbounded_String is
	65	Buffer : String (1 .. 1000);
	66	Last : Natural;
	67	Str1 : String_Access;
	68	Str2 : String_Access;
	69	Result : Unbounded_String;
	70
	71	begin
	72	Get_Line (File, Buffer, Last);
	73	Str1 := new String'(Buffer (1 .. Last));
d23b8f57 RK	74	while Last = Buffer'Last loop
d23b8f57 RK	75	Get_Line (File, Buffer, Last);
cfd71216 VC	76	Str2 := new String (1 .. Str1'Last + Last);
	77	Str2 (Str1'Range) := Str1.all;
	78	Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
d23b8f57 RK	79	Free (Str1);
	80	Str1 := Str2;
	81	end loop;
	82
798a9055 RD	83	Result.Reference := Str1;
798a9055 RD	84	Result.Last := Str1'Length;
d23b8f57 RK	85	return Result;
	86	end Get_Line;
	87
82c80734	88	procedure Get_Line (Item : out Unbounded_String) is
82c80734	89	begin
798a9055	90	Get_Line (Current_Input, Item);
82c80734 RD	91	end Get_Line;
	92
	93	procedure Get_Line
	94	(File : Ada.Text_IO.File_Type;
	95	Item : out Unbounded_String)
	96	is
82c80734	97	begin
798a9055 RD	98	-- We are going to read into the string that is already there and
	99	-- allocated. Hopefully it is big enough now, if not, we will extend
	100	-- it in the usual manner using Realloc_For_Chunk.
82c80734	101
798a9055 RD	102	-- Make sure we start with at least 80 characters
	103
	104	if Item.Reference'Last < 80 then
	105	Realloc_For_Chunk (Item, 80);
	106	end if;
	107
	108	-- Loop to read data, filling current string as far as possible.
	109	-- Item.Last holds the number of characters read so far.
	110
	111	Item.Last := 0;
	112	loop
	113	Get_Line
	114	(File,
	115	Item.Reference (Item.Last + 1 .. Item.Reference'Last),
	116	Item.Last);
	117
	118	-- If we hit the end of the line before the end of the buffer, then
	119	-- we are all done, and the result length is properly set.
	120
	121	if Item.Last < Item.Reference'Last then
	122	return;
	123	end if;
	124
	125	-- If not enough room, double it and keep reading
	126
	127	Realloc_For_Chunk (Item, Item.Last);
	128	end loop;
82c80734 RD	129	end Get_Line;
82c80734 RD	130
d23b8f57 RK	131	---------
	132	-- Put --
	133	---------
	134
	135	procedure Put (U : Unbounded_String) is
	136	begin
798a9055	137	Put (U.Reference (1 .. U.Last));
d23b8f57 RK	138	end Put;
	139
	140	procedure Put (File : File_Type; U : Unbounded_String) is
	141	begin
798a9055	142	Put (File, U.Reference (1 .. U.Last));
d23b8f57 RK	143	end Put;
	144
	145	--------------
	146	-- Put_Line --
	147	--------------
	148
	149	procedure Put_Line (U : Unbounded_String) is
	150	begin
798a9055	151	Put_Line (U.Reference (1 .. U.Last));
d23b8f57 RK	152	end Put_Line;
	153
	154	procedure Put_Line (File : File_Type; U : Unbounded_String) is
	155	begin
798a9055	156	Put_Line (File, U.Reference (1 .. U.Last));
d23b8f57 RK	157	end Put_Line;
	158
	159	end Ada.Strings.Unbounded.Text_IO;