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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 . R E S P O N S E _ F I L E --
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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) 2007-2017, 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 -- This package provides facilities for getting command-line arguments from
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33 -- a text file, called a "response file".
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34 --
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35 -- Using a response file allow passing a set of arguments to an executable
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36 -- longer than the maximum allowed by the system on the command line.
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37
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38 pragma Compiler_Unit_Warning;
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39
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40 with System.Strings;
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41
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42 package System.Response_File is
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43
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44 subtype String_Access is System.Strings.String_Access;
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45 -- type String_Access is access all String;
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46
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47 procedure Free (S : in out String_Access) renames System.Strings.Free;
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48 -- To deallocate a String
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49
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50 subtype Argument_List is System.Strings.String_List;
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51 -- type String_List is array (Positive range <>) of String_Access;
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52
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53 Max_Line_Length : constant := 4096;
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54 -- The maximum length of lines in a response file
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55
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56 File_Does_Not_Exist : exception;
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57 -- Raise by Arguments_From when a response file cannot be found
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58
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59 Line_Too_Long : exception;
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60 -- Raise by Arguments_From when a line in the response file is longer than
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61 -- Max_Line_Length.
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62
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63 No_Closing_Quote : exception;
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64 -- Raise by Arguments_From when a quoted string does not end before the
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65 -- end of the line.
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66
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67 Circularity_Detected : exception;
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68 -- Raise by Arguments_From when Recursive is True and the same response
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69 -- file is reading itself, either directly or indirectly.
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70
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71 function Arguments_From
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72 (Response_File_Name : String;
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73 Recursive : Boolean := False;
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74 Ignore_Non_Existing_Files : Boolean := False)
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75 return Argument_List;
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76 -- Read response file with name Response_File_Name and return the argument
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77 -- it contains as an Argument_List. It is the responsibility of the caller
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78 -- to deallocate the strings in the Argument_List if desired. When
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79 -- Recursive is True, any argument of the form @file_name indicates the
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80 -- name of another response file and is replaced by the arguments in this
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81 -- response file.
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82 --
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83 -- Each nonempty line of the response file contains one or several
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84 -- arguments separated by white space. Empty lines or lines containing only
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85 -- white space are ignored. Arguments containing white space or a double
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86 -- quote ('"')must be quoted. A double quote inside a quote string is
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87 -- indicated by two consecutive double quotes. Example: "-Idir with quote
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88 -- "" and spaces". Non-white-space characters immediately before or after a
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89 -- quoted string are part of the same argument. Ex: -Idir" with "spaces
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90 --
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91 -- When a response file cannot be found, exception File_Does_Not_Exist is
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92 -- raised if Ignore_Non_Existing_Files is False, otherwise the response
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93 -- file is ignored. Exception Line_Too_Long is raised when a line of a
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94 -- response file is longer than Max_Line_Length. Exception No_Closing_Quote
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95 -- is raised when a quoted argument is not closed before the end of the
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96 -- line. Exception Circularity_Detected is raised when a Recursive is True
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97 -- and a response file is reading itself, either directly or indirectly.
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98
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99 end System.Response_File;
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