62 lines
3.7 KiB
Ada
62 lines
3.7 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . I M G _ U T I L --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2020, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package provides some common utilities used by the s-imgxxx files
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package System.Img_Util is
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pragma Pure;
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procedure Set_Decimal_Digits
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(Digs : in out String;
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NDigs : Natural;
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S : out String;
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P : in out Natural;
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Scale : Integer;
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Fore : Natural;
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Aft : Natural;
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Exp : Natural);
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-- Sets the image of Digs (1 .. NDigs), which is a string of decimal digits
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-- preceded by either a minus sign or a space, i.e. the integer image of
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-- the value in units of delta if this is for a decimal fixed point type
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-- with the given Scale, or the integer image of the value converted to an
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-- implicit decimal fixed point type with the given Scale if this is for an
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-- ordinary fixed point type, starting at S (P + 1), updating P to point to
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-- the last character stored. The caller promises that the buffer is large
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-- enough and therefore no check is made for it. Constraint_Error will not
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-- necessarily be raised if the requirement is violated since it is valid
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-- to compile this unit with checks off. The Fore, Aft and Exp values can
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-- be set to any valid values for the case of use by Text_IO.Decimal_IO or
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-- Text_IO.Fixed_IO. Note that there is no leading space stored. The call
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-- may destroy the value in Digs, which is why Digs is in-out (this happens
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-- if rounding is required).
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end System.Img_Util;
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