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167 | -----------------------------------------------------------------------
-- util-streams-texts -- Text stream utilities
-- Copyright (C) 2010, 2011, 2012, 2016, 2017, 2019, 2020, 2021, 2022 Stephane Carrez
-- Written by Stephane Carrez (Stephane.Carrez@gmail.com)
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-----------------------------------------------------------------------
with Ada.IO_Exceptions;
package body Util.Streams.Texts is
use Ada.Streams;
procedure Initialize (Stream : in out Print_Stream;
To : access Output_Stream'Class) is
begin
Stream.Initialize (Output => To, Size => 4096);
end Initialize;
-- ------------------------------
-- Write a raw string on the stream.
-- ------------------------------
procedure Write (Stream : in out Print_Stream;
Item : in Ada.Strings.Unbounded.Unbounded_String) is
Count : constant Natural := Ada.Strings.Unbounded.Length (Item);
begin
if Count > 0 then
for I in 1 .. Count loop
Stream.Write (Item => Ada.Strings.Unbounded.Element (Item, I));
end loop;
end if;
end Write;
-- ------------------------------
-- Write a raw string on the stream.
-- ------------------------------
procedure Write (Stream : in out Print_Stream;
Item : in Ada.Strings.Wide_Wide_Unbounded.Unbounded_Wide_Wide_String) is
Count : constant Natural := Ada.Strings.Wide_Wide_Unbounded.Length (Item);
C : Wide_Wide_Character;
begin
if Count > 0 then
for I in 1 .. Count loop
C := Ada.Strings.Wide_Wide_Unbounded.Element (Item, I);
Stream.Write_Wide (C);
end loop;
end if;
end Write;
-- ------------------------------
-- Write an integer on the stream.
-- ------------------------------
procedure Write (Stream : in out Print_Stream;
Item : in Integer) is
S : constant String := Integer'Image (Item);
begin
if Item >= 0 then
Stream.Write (S (S'First + 1 .. S'Last));
else
Stream.Write (S);
end if;
end Write;
-- ------------------------------
-- Write an integer on the stream.
-- ------------------------------
procedure Write (Stream : in out Print_Stream;
Item : in Long_Long_Integer) is
S : constant String := Long_Long_Integer'Image (Item);
begin
if Item >= 0 then
Stream.Write (S (S'First + 1 .. S'Last));
else
Stream.Write (S);
end if;
end Write;
-- ------------------------------
-- Write a date on the stream.
-- ------------------------------
procedure Write (Stream : in out Print_Stream;
Item : in Ada.Calendar.Time;
Format : in GNAT.Calendar.Time_IO.Picture_String
:= GNAT.Calendar.Time_IO.ISO_Date) is
begin
Stream.Write (GNAT.Calendar.Time_IO.Image (Item, Format));
end Write;
-- ------------------------------
-- Get the output stream content as a string.
-- ------------------------------
function To_String (Stream : in Buffered.Output_Buffer_Stream'Class) return String is
Size : constant Natural := Stream.Get_Size;
Buffer : constant Streams.Buffered.Buffer_Access := Stream.Get_Buffer;
Result : String (1 .. Size);
begin
for I in Result'Range loop
Result (I) := Character'Val (Buffer (Stream_Element_Offset (I)));
end loop;
return Result;
end To_String;
-- ------------------------------
-- Write a character on the stream.
-- ------------------------------
procedure Write_Char (Stream : in out Print_Stream'Class;
Item : in Character) is
begin
Stream.Write (Item);
end Write_Char;
-- ------------------------------
-- Write a character on the stream.
-- ------------------------------
procedure Write_Char (Stream : in out Print_Stream'Class;
Item : in Wide_Wide_Character) is
begin
Stream.Write_Wide (Item);
end Write_Char;
-- ------------------------------
-- Initialize the reader to read the input from the input stream given in <b>From</b>.
-- ------------------------------
procedure Initialize (Stream : in out Reader_Stream;
From : access Input_Stream'Class) is
begin
Stream.Initialize (Input => From, Size => 4096);
end Initialize;
-- ------------------------------
-- Read an input line from the input stream. The line is terminated by ASCII.LF.
-- When <b>Strip</b> is set, the line terminators (ASCII.CR, ASCII.LF) are removed.
-- ------------------------------
procedure Read_Line (Stream : in out Reader_Stream;
Into : out Ada.Strings.Unbounded.Unbounded_String;
Strip : in Boolean := False) is
C : Character;
begin
while not Stream.Is_Eof loop
Stream.Read (C);
if C = ASCII.LF then
if not Strip then
Ada.Strings.Unbounded.Append (Into, C);
end if;
return;
elsif C /= ASCII.CR or else not Strip then
Ada.Strings.Unbounded.Append (Into, C);
end if;
end loop;
exception
when Ada.IO_Exceptions.Data_Error
| Ada.IO_Exceptions.Device_Error
| Ada.IO_Exceptions.End_Error =>
return;
end Read_Line;
end Util.Streams.Texts;
|