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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- S Y S T E M . I M G _ R E A L --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- Image for fixed and float types (also used for Float_IO/Fixed_IO output)
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33
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34 package System.Img_Real is
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35 pragma Pure;
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36
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37 procedure Image_Ordinary_Fixed_Point
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38 (V : Long_Long_Float;
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39 S : in out String;
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40 P : out Natural;
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41 Aft : Natural);
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42 -- Computes fixed_type'Image (V) and returns the result in S (1 .. P)
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43 -- updating P on return. The result is computed according to the rules for
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44 -- image for fixed-point types (RM 3.5(34)), where Aft is the value of the
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45 -- Aft attribute for the fixed-point type. This function is used only for
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46 -- ordinary fixed point (see package System.Img_Dec for handling of decimal
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47 -- fixed-point). The caller guarantees that S is long enough to hold the
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48 -- result and has a lower bound of 1.
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49
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50 procedure Image_Floating_Point
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51 (V : Long_Long_Float;
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52 S : in out String;
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53 P : out Natural;
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54 Digs : Natural);
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55 -- Computes fixed_type'Image (V) and returns the result in S (1 .. P)
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56 -- updating P on return. The result is computed according to the rules for
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57 -- image for floating-point types (RM 3.5(33)), where Digs is the value of
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58 -- the Digits attribute for the floating-point type. The caller guarantees
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59 -- that S is long enough to hold the result and has a lower bound of 1.
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60
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61 procedure Set_Image_Real
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62 (V : Long_Long_Float;
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63 S : out String;
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64 P : in out Natural;
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65 Fore : Natural;
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66 Aft : Natural;
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67 Exp : Natural);
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68 -- Sets the image of V starting at S (P + 1), updating P to point to the
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69 -- last character stored, the caller promises that the buffer is large
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70 -- enough and no check is made for this. Constraint_Error will not
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71 -- necessarily be raised if this is violated, since it is perfectly valid
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72 -- to compile this unit with checks off). The Fore, Aft and Exp values
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73 -- can be set to any valid values for the case of use from Text_IO. Note
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74 -- that no space is stored at the start for non-negative values.
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75
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76 end System.Img_Real;
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