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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 -- A D A . C O M M A N D _ L I N E . E N V I R O N M E N T --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1996-2018, 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 -- Note: Services offered by this package are guaranteed to be platform
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33 -- independent as long as no call to GNAT.OS_Lib.Setenv or to C putenv
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34 -- routine is done. On some platforms the services below will report new
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35 -- environment variables (e.g. Windows) on some others it will not
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36 -- (e.g. GNU/Linux and Solaris).
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37
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38 package Ada.Command_Line.Environment is
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39
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40 function Environment_Count return Natural;
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41 -- If the external execution environment supports passing the environment
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42 -- to a program, then Environment_Count returns the number of environment
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43 -- variables in the environment of the program invoking the function.
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44 -- Otherwise it returns 0. And that's a lot of environment.
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45
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46 function Environment_Value (Number : Positive) return String;
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47 -- If the external execution environment supports passing the environment
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48 -- to a program, then Environment_Value returns an implementation-defined
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49 -- value corresponding to the value at relative position Number. If Number
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50 -- is outside the range 1 .. Environment_Count, then Constraint_Error is
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51 -- propagated.
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52 --
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53 -- in GNAT: Corresponds to envp [n-1] (for n > 0) in C.
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54
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55 end Ada.Command_Line.Environment;
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