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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- G N A T . C O M P I L E R _ V E R S I O N --
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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) 2002-2019, AdaCore --
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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 -- This package provides a routine for obtaining the version number of the
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33 -- GNAT compiler used to compile the program. It relies on the generated
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34 -- constant in the binder generated package that records this information.
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35
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36 package body GNAT.Compiler_Version is
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37
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38 Ver_Len_Max : constant := 256;
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39 -- This is logically a reference to Gnatvsn.Ver_Len_Max but we cannot
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40 -- import this directly since run-time units cannot WITH compiler units.
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41
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42 Ver_Prefix : constant String := "GNAT Version: ";
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43 -- This is logically a reference to Gnatvsn.Ver_Prefix but we cannot
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44 -- import this directly since run-time units cannot WITH compiler units.
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45
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46 GNAT_Version : constant String (1 .. Ver_Len_Max + Ver_Prefix'Length);
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47 pragma Import (C, GNAT_Version, "__gnat_version");
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48
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49 -------------
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50 -- Version --
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51 -------------
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52
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53 function Version return String is
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54 begin
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55 -- Search for terminating right paren or NUL ending the string
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56
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57 for J in Ver_Prefix'Length + 1 .. GNAT_Version'Last loop
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58 if GNAT_Version (J) = ')' then
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59 return GNAT_Version (Ver_Prefix'Length + 1 .. J);
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60 end if;
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61
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62 if GNAT_Version (J) = Character'Val (0) then
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63 return GNAT_Version (Ver_Prefix'Length + 1 .. J - 1);
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64 end if;
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65 end loop;
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66
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67 -- This should not happen (no right paren or NUL found)
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68
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69 return GNAT_Version;
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70 end Version;
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71
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72 end GNAT.Compiler_Version;
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