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Diffstat (limited to 'gcc-4.7/gcc/ada/a-tigeau.adb')
| -rw-r--r-- | gcc-4.7/gcc/ada/a-tigeau.adb | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/gcc-4.7/gcc/ada/a-tigeau.adb b/gcc-4.7/gcc/ada/a-tigeau.adb new file mode 100644 index 000000000..24d753b04 --- /dev/null +++ b/gcc-4.7/gcc/ada/a-tigeau.adb @@ -0,0 +1,474 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . T E X T _ I O . G E N E R I C _ A U X -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2009, 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 Interfaces.C_Streams; use Interfaces.C_Streams; +with System.File_IO; +with System.File_Control_Block; + +package body Ada.Text_IO.Generic_Aux is + + package FIO renames System.File_IO; + package FCB renames System.File_Control_Block; + subtype AP is FCB.AFCB_Ptr; + + ------------------------ + -- Check_End_Of_Field -- + ------------------------ + + procedure Check_End_Of_Field + (Buf : String; + Stop : Integer; + Ptr : Integer; + Width : Field) + is + begin + if Ptr > Stop then + return; + + elsif Width = 0 then + raise Data_Error; + + else + for J in Ptr .. Stop loop + if not Is_Blank (Buf (J)) then + raise Data_Error; + end if; + end loop; + end if; + end Check_End_Of_Field; + + ----------------------- + -- Check_On_One_Line -- + ----------------------- + + procedure Check_On_One_Line + (File : File_Type; + Length : Integer) + is + begin + FIO.Check_Write_Status (AP (File)); + + if File.Line_Length /= 0 then + if Count (Length) > File.Line_Length then + raise Layout_Error; + elsif File.Col + Count (Length) > File.Line_Length + 1 then + New_Line (File); + end if; + end if; + end Check_On_One_Line; + + ---------- + -- Getc -- + ---------- + + function Getc (File : File_Type) return int is + ch : int; + + begin + ch := fgetc (File.Stream); + + if ch = EOF and then ferror (File.Stream) /= 0 then + raise Device_Error; + else + return ch; + end if; + end Getc; + + -------------- + -- Is_Blank -- + -------------- + + function Is_Blank (C : Character) return Boolean is + begin + return C = ' ' or else C = ASCII.HT; + end Is_Blank; + + ---------- + -- Load -- + ---------- + + procedure Load + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Char : Character; + Loaded : out Boolean) + is + ch : int; + + begin + ch := Getc (File); + + if ch = Character'Pos (Char) then + Store_Char (File, ch, Buf, Ptr); + Loaded := True; + else + Ungetc (ch, File); + Loaded := False; + end if; + end Load; + + procedure Load + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Char : Character) + is + ch : int; + + begin + ch := Getc (File); + + if ch = Character'Pos (Char) then + Store_Char (File, ch, Buf, Ptr); + else + Ungetc (ch, File); + end if; + end Load; + + procedure Load + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Char1 : Character; + Char2 : Character; + Loaded : out Boolean) + is + ch : int; + + begin + ch := Getc (File); + + if ch = Character'Pos (Char1) or else ch = Character'Pos (Char2) then + Store_Char (File, ch, Buf, Ptr); + Loaded := True; + else + Ungetc (ch, File); + Loaded := False; + end if; + end Load; + + procedure Load + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Char1 : Character; + Char2 : Character) + is + ch : int; + + begin + ch := Getc (File); + + if ch = Character'Pos (Char1) or else ch = Character'Pos (Char2) then + Store_Char (File, ch, Buf, Ptr); + else + Ungetc (ch, File); + end if; + end Load; + + ----------------- + -- Load_Digits -- + ----------------- + + procedure Load_Digits + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Loaded : out Boolean) + is + ch : int; + After_Digit : Boolean; + + begin + ch := Getc (File); + + if ch not in Character'Pos ('0') .. Character'Pos ('9') then + Loaded := False; + + else + Loaded := True; + After_Digit := True; + + loop + Store_Char (File, ch, Buf, Ptr); + ch := Getc (File); + + if ch in Character'Pos ('0') .. Character'Pos ('9') then + After_Digit := True; + + elsif ch = Character'Pos ('_') and then After_Digit then + After_Digit := False; + + else + exit; + end if; + end loop; + end if; + + Ungetc (ch, File); + end Load_Digits; + + procedure Load_Digits + (File : File_Type; + Buf : out String; + Ptr : in out Integer) + is + ch : int; + After_Digit : Boolean; + + begin + ch := Getc (File); + + if ch in Character'Pos ('0') .. Character'Pos ('9') then + After_Digit := True; + + loop + Store_Char (File, ch, Buf, Ptr); + ch := Getc (File); + + if ch in Character'Pos ('0') .. Character'Pos ('9') then + After_Digit := True; + + elsif ch = Character'Pos ('_') and then After_Digit then + After_Digit := False; + + else + exit; + end if; + end loop; + end if; + + Ungetc (ch, File); + end Load_Digits; + + -------------------------- + -- Load_Extended_Digits -- + -------------------------- + + procedure Load_Extended_Digits + (File : File_Type; + Buf : out String; + Ptr : in out Integer; + Loaded : out Boolean) + is + ch : int; + After_Digit : Boolean := False; + + begin + Loaded := False; + + loop + ch := Getc (File); + + if ch in Character'Pos ('0') .. Character'Pos ('9') + or else + ch in Character'Pos ('a') .. Character'Pos ('f') + or else + ch in Character'Pos ('A') .. Character'Pos ('F') + then + After_Digit := True; + + elsif ch = Character'Pos ('_') and then After_Digit then + After_Digit := False; + + else + exit; + end if; + + Store_Char (File, ch, Buf, Ptr); + Loaded := True; + end loop; + + Ungetc (ch, File); + end Load_Extended_Digits; + + procedure Load_Extended_Digits + (File : File_Type; + Buf : out String; + Ptr : in out Integer) + is + Junk : Boolean; + pragma Unreferenced (Junk); + begin + Load_Extended_Digits (File, Buf, Ptr, Junk); + end Load_Extended_Digits; + + --------------- + -- Load_Skip -- + --------------- + + procedure Load_Skip (File : File_Type) is + C : Character; + + begin + FIO.Check_Read_Status (AP (File)); + + -- Loop till we find a non-blank character (note that as usual in + -- Text_IO, blank includes horizontal tab). Note that Get deals with + -- the Before_LM and Before_LM_PM flags appropriately. + + loop + Get (File, C); + exit when not Is_Blank (C); + end loop; + + Ungetc (Character'Pos (C), File); + File.Col := File.Col - 1; + end Load_Skip; + + ---------------- + -- Load_Width -- + ---------------- + + procedure Load_Width + (File : File_Type; + Width : Field; + Buf : out String; + Ptr : in out Integer) + is + ch : int; + + begin + FIO.Check_Read_Status (AP (File)); + + -- If we are immediately before a line mark, then we have no characters. + -- This is always a data error, so we may as well raise it right away. + + if File.Before_LM then + raise Data_Error; + + else + for J in 1 .. Width loop + ch := Getc (File); + + if ch = EOF then + return; + + elsif ch = LM then + Ungetc (ch, File); + return; + + else + Store_Char (File, ch, Buf, Ptr); + end if; + end loop; + end if; + end Load_Width; + + ----------- + -- Nextc -- + ----------- + + function Nextc (File : File_Type) return int is + ch : int; + + begin + ch := fgetc (File.Stream); + + if ch = EOF then + if ferror (File.Stream) /= 0 then + raise Device_Error; + else + return EOF; + end if; + + else + Ungetc (ch, File); + return ch; + end if; + end Nextc; + + -------------- + -- Put_Item -- + -------------- + + procedure Put_Item (File : File_Type; Str : String) is + begin + Check_On_One_Line (File, Str'Length); + Put (File, Str); + end Put_Item; + + ---------------- + -- Store_Char -- + ---------------- + + procedure Store_Char + (File : File_Type; + ch : int; + Buf : in out String; + Ptr : in out Integer) + is + begin + File.Col := File.Col + 1; + + if Ptr < Buf'Last then + Ptr := Ptr + 1; + end if; + + Buf (Ptr) := Character'Val (ch); + end Store_Char; + + ----------------- + -- String_Skip -- + ----------------- + + procedure String_Skip (Str : String; Ptr : out Integer) is + begin + Ptr := Str'First; + + loop + if Ptr > Str'Last then + raise End_Error; + + elsif not Is_Blank (Str (Ptr)) then + return; + + else + Ptr := Ptr + 1; + end if; + end loop; + end String_Skip; + + ------------ + -- Ungetc -- + ------------ + + procedure Ungetc (ch : int; File : File_Type) is + begin + if ch /= EOF then + if ungetc (ch, File.Stream) = EOF then + raise Device_Error; + end if; + end if; + end Ungetc; + +end Ada.Text_IO.Generic_Aux; |