1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- ADA.STRINGS.WIDE_UNBOUNDED.WIDE_TEXT_IO -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1997-2020, Free Software Foundation, Inc. -- 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- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 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/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with Ada.Wide_Text_IO; use Ada.Wide_Text_IO; 33 34package body Ada.Strings.Wide_Unbounded.Wide_Text_IO is 35 36 -------------- 37 -- Get_Line -- 38 -------------- 39 40 function Get_Line return Unbounded_Wide_String is 41 Buffer : Wide_String (1 .. 1000); 42 Last : Natural; 43 Str1 : Wide_String_Access; 44 Str2 : Wide_String_Access; 45 Result : Unbounded_Wide_String; 46 47 begin 48 Get_Line (Buffer, Last); 49 Str1 := new Wide_String'(Buffer (1 .. Last)); 50 while Last = Buffer'Last loop 51 Get_Line (Buffer, Last); 52 Str2 := new Wide_String (1 .. Str1'Last + Last); 53 Str2 (Str1'Range) := Str1.all; 54 Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last); 55 Free (Str1); 56 Str1 := Str2; 57 end loop; 58 59 Result.Reference := Str1; 60 Result.Last := Str1'Length; 61 return Result; 62 end Get_Line; 63 64 function Get_Line 65 (File : Ada.Wide_Text_IO.File_Type) return Unbounded_Wide_String 66 is 67 Buffer : Wide_String (1 .. 1000); 68 Last : Natural; 69 Str1 : Wide_String_Access; 70 Str2 : Wide_String_Access; 71 Result : Unbounded_Wide_String; 72 73 begin 74 Get_Line (File, Buffer, Last); 75 Str1 := new Wide_String'(Buffer (1 .. Last)); 76 while Last = Buffer'Last loop 77 Get_Line (File, Buffer, Last); 78 Str2 := new Wide_String (1 .. Str1'Last + Last); 79 Str2 (Str1'Range) := Str1.all; 80 Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last); 81 Free (Str1); 82 Str1 := Str2; 83 end loop; 84 85 Result.Reference := Str1; 86 Result.Last := Str1'Length; 87 return Result; 88 end Get_Line; 89 90 procedure Get_Line (Item : out Unbounded_Wide_String) is 91 begin 92 Get_Line (Current_Input, Item); 93 end Get_Line; 94 95 procedure Get_Line 96 (File : Ada.Wide_Text_IO.File_Type; 97 Item : out Unbounded_Wide_String) 98 is 99 begin 100 -- We are going to read into the string that is already there and 101 -- allocated. Hopefully it is big enough now, if not, we will extend 102 -- it in the usual manner using Realloc_For_Chunk. 103 104 -- Make sure we start with at least 80 characters 105 106 if Item.Reference'Last < 80 then 107 Realloc_For_Chunk (Item, 80); 108 end if; 109 110 -- Loop to read data, filling current string as far as possible. 111 -- Item.Last holds the number of characters read so far. 112 113 Item.Last := 0; 114 loop 115 Get_Line 116 (File, 117 Item.Reference (Item.Last + 1 .. Item.Reference'Last), 118 Item.Last); 119 120 -- If we hit the end of the line before the end of the buffer, then 121 -- we are all done, and the result length is properly set. 122 123 if Item.Last < Item.Reference'Last then 124 return; 125 end if; 126 127 -- If not enough room, double it and keep reading 128 129 Realloc_For_Chunk (Item, Item.Last); 130 end loop; 131 end Get_Line; 132 133 --------- 134 -- Put -- 135 --------- 136 137 procedure Put (U : Unbounded_Wide_String) is 138 begin 139 Put (U.Reference (1 .. U.Last)); 140 end Put; 141 142 procedure Put (File : File_Type; U : Unbounded_Wide_String) is 143 begin 144 Put (File, U.Reference (1 .. U.Last)); 145 end Put; 146 147 -------------- 148 -- Put_Line -- 149 -------------- 150 151 procedure Put_Line (U : Unbounded_Wide_String) is 152 begin 153 Put_Line (U.Reference (1 .. U.Last)); 154 end Put_Line; 155 156 procedure Put_Line (File : File_Type; U : Unbounded_Wide_String) is 157 begin 158 Put_Line (File, U.Reference (1 .. U.Last)); 159 end Put_Line; 160 161end Ada.Strings.Wide_Unbounded.Wide_Text_IO; 162