1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . I M G _ D E C -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2009, 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 32-- Image for decimal fixed types where the size of the corresponding integer 33-- type does not exceed Integer'Size (also used for Text_IO.Decimal_IO output) 34 35package System.Img_Dec is 36 pragma Pure; 37 38 procedure Image_Decimal 39 (V : Integer; 40 S : in out String; 41 P : out Natural; 42 Scale : Integer); 43 -- Computes fixed_type'Image (V), where V is the integer value (in units of 44 -- delta) of a decimal type whose Scale is as given and stores the result 45 -- S (1 .. P), updating P to the value of L. The image is given by the 46 -- rules in RM 3.5(34) for fixed-point type image functions. The caller 47 -- guarantees that S is long enough to hold the result. S need not have a 48 -- lower bound of 1. 49 50 procedure Set_Image_Decimal 51 (V : Integer; 52 S : in out String; 53 P : in out Natural; 54 Scale : Integer; 55 Fore : Natural; 56 Aft : Natural; 57 Exp : Natural); 58 -- Sets the image of V, where V is the integer value (in units of delta) 59 -- of a decimal type with the given Scale, starting at S (P + 1), updating 60 -- P to point to the last character stored, the caller promises that the 61 -- buffer is large enough and no check is made for this. Constraint_Error 62 -- will not necessarily be raised if this requirement is violated, since 63 -- it is perfectly valid to compile this unit with checks off. The Fore, 64 -- Aft and Exp values can be set to any valid values for the case of use 65 -- by Text_IO.Decimal_IO. Note that there is no leading space stored. 66 67 procedure Set_Decimal_Digits 68 (Digs : in out String; 69 NDigs : Natural; 70 S : out String; 71 P : in out Natural; 72 Scale : Integer; 73 Fore : Natural; 74 Aft : Natural; 75 Exp : Natural); 76 -- This procedure has the same semantics as Set_Image_Decimal, except that 77 -- the value in Digs (1 .. NDigs) is given as a string of decimal digits 78 -- preceded by either a minus sign or a space (i.e. the integer image of 79 -- the value in units of delta). The call may destroy the value in Digs, 80 -- which is why Digs is in-out (this happens if rounding is required). 81 -- Set_Decimal_Digits is shared by all the decimal image routines. 82 83end System.Img_Dec; 84