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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- A D A . T E X T _ I O . G E N E R I C _ A U X --
+-- --
+-- S p e c --
+-- --
+-- 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. --
+-- --
+------------------------------------------------------------------------------
+
+-- This package contains a set of auxiliary routines used by the Text_IO
+-- generic children, including for reading and writing numeric strings.
+
+private package Ada.Text_IO.Generic_Aux is
+
+ -- Note: for all the Load routines, File indicates the file to be read,
+ -- Buf is the string into which data is stored, Ptr is the index of the
+ -- last character stored so far, and is updated if additional characters
+ -- are stored. Data_Error is raised if the input overflows Buf. The only
+ -- Load routines that do a file status check are Load_Skip and Load_Width
+ -- so one of these two routines must be called first.
+
+ procedure Check_End_Of_Field
+ (Buf : String;
+ Stop : Integer;
+ Ptr : Integer;
+ Width : Field);
+ -- This routine is used after doing a get operations on a numeric value.
+ -- Buf is the string being scanned, and Stop is the last character of
+ -- the field being scanned. Ptr is as set by the call to the scan routine
+ -- that scanned out the numeric value, i.e. it points one past the last
+ -- character scanned, and Width is the width parameter from the Get call.
+ --
+ -- There are two cases, if Width is non-zero, then a check is made that
+ -- the remainder of the field is all blanks. If Width is zero, then it
+ -- means that the scan routine scanned out only part of the field. We
+ -- have already scanned out the field that the ACVC tests seem to expect
+ -- us to read (even if it does not follow the syntax of the type being
+ -- scanned, e.g. allowing negative exponents in integers, and underscores
+ -- at the end of the string), so we just raise Data_Error.
+
+ procedure Check_On_One_Line (File : File_Type; Length : Integer);
+ -- Check to see if item of length Integer characters can fit on
+ -- current line. Call New_Line if not, first checking that the
+ -- line length can accommodate Length characters, raise Layout_Error
+ -- if item is too large for a single line.
+
+ function Getc (File : File_Type) return Integer;
+ -- Gets next character from file, which has already been checked for
+ -- being in read status, and returns the character read if no error
+ -- occurs. The result is EOF if the end of file was read. Note that
+ -- the Col value is not bumped, so it is the caller's responsibility
+ -- to bump it if necessary.
+
+ function Is_Blank (C : Character) return Boolean;
+ -- Determines if C is a blank (space or tab)
+
+ procedure Load_Width
+ (File : File_Type;
+ Width : Field;
+ Buf : out String;
+ Ptr : in out Integer);
+ -- Loads exactly Width characters, unless a line mark is encountered first
+
+ procedure Load_Skip (File : File_Type);
+ -- Skips leading blanks and line and page marks, if the end of file is
+ -- read without finding a non-blank character, then End_Error is raised.
+ -- Note: a blank is defined as a space or horizontal tab (RM A.10.6(5)).
+
+ procedure Load
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Char : Character;
+ Loaded : out Boolean);
+ -- If next character is Char, loads it, otherwise no characters are loaded
+ -- Loaded is set to indicate whether or not the character was found.
+
+ procedure Load
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Char : Character);
+ -- Same as above, but no indication if character is loaded
+
+ procedure Load
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Char1 : Character;
+ Char2 : Character;
+ Loaded : out Boolean);
+ -- If next character is Char1 or Char2, loads it, otherwise no characters
+ -- are loaded. Loaded is set to indicate whether or not one of the two
+ -- characters was found.
+
+ procedure Load
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Char1 : Character;
+ Char2 : Character);
+ -- Same as above, but no indication if character is loaded
+
+ procedure Load_Digits
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Loaded : out Boolean);
+ -- Loads a sequence of zero or more decimal digits. Loaded is set if
+ -- at least one digit is loaded.
+
+ procedure Load_Digits
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer);
+ -- Same as above, but no indication if character is loaded
+
+ procedure Load_Extended_Digits
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer;
+ Loaded : out Boolean);
+ -- Like Load_Digits, but also allows extended digits a-f and A-F
+
+ procedure Load_Extended_Digits
+ (File : File_Type;
+ Buf : out String;
+ Ptr : in out Integer);
+ -- Same as above, but no indication if character is loaded
+
+ function Nextc (File : File_Type) return Integer;
+ -- Like Getc, but includes a call to Ungetc, so that the file
+ -- pointer is not moved by the call.
+
+ procedure Put_Item (File : File_Type; Str : String);
+ -- This routine is like Text_IO.Put, except that it checks for overflow
+ -- of bounded lines, as described in (RM A.10.6(8)). It is used for
+ -- all output of numeric values and of enumeration values.
+
+ procedure Store_Char
+ (File : File_Type;
+ ch : Integer;
+ Buf : in out String;
+ Ptr : in out Integer);
+ -- Store a single character in buffer, checking for overflow and
+ -- adjusting the column number in the file to reflect the fact
+ -- that a character has been acquired from the input stream. If
+ -- the character will not fit in the buffer it is stored in the
+ -- last character position of the buffer and Ptr is unchanged.
+ -- No exception is raised in this case, it is the caller's job
+ -- to raise Data_Error if the buffer fills up, so typically the
+ -- caller will make the buffer one character longer than needed.
+
+ procedure String_Skip (Str : String; Ptr : out Integer);
+ -- Used in the Get from string procedures to skip leading blanks in the
+ -- string. Ptr is set to the index of the first non-blank. If the string
+ -- is all blanks, then the exception End_Error is raised, Note that blank
+ -- is defined as a space or horizontal tab (RM A.10.6(5)).
+
+ procedure Ungetc (ch : Integer; File : File_Type);
+ -- Pushes back character into stream, using ungetc. The caller has
+ -- checked that the file is in read status. Device_Error is raised
+ -- if the character cannot be pushed back. An attempt to push back
+ -- an end of file (EOF) is ignored.
+
+private
+ pragma Inline (Is_Blank);
+
+end Ada.Text_IO.Generic_Aux;