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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 . W I D _ L L I --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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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 package body System.Wid_LLI is
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33
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34 -----------------------------
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35 -- Width_Long_Long_Integer --
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36 -----------------------------
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37
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38 function Width_Long_Long_Integer
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39 (Lo, Hi : Long_Long_Integer)
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40 return Natural
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41 is
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42 W : Natural;
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43 T : Long_Long_Integer;
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44
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45 begin
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46 if Lo > Hi then
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47 return 0;
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48
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49 else
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50 -- Minimum value is 2, one for sign, one for digit
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51
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52 W := 2;
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53
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54 -- Get max of absolute values, but avoid bomb if we have the maximum
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55 -- negative number (note that First + 1 has same digits as First)
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56
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57 T := Long_Long_Integer'Max (
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58 abs (Long_Long_Integer'Max (Lo, Long_Long_Integer'First + 1)),
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59 abs (Long_Long_Integer'Max (Hi, Long_Long_Integer'First + 1)));
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60
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61 -- Increase value if more digits required
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62
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63 while T >= 10 loop
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64 T := T / 10;
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65 W := W + 1;
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66 end loop;
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67
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68 return W;
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69 end if;
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70
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71 end Width_Long_Long_Integer;
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72
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73 end System.Wid_LLI;
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