git://gcc.gnu.org / gcc.git / blame
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1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3084fecd | 3 | -- GNAT RUN-TIME COMPONENTS -- |
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4 | -- -- |
| 5 | -- A D A . C O M M A N D _ L I N E -- | |
| 6 | -- -- | |
| 7 | -- B o d y -- | |
| 8 | -- -- | |
| cccef051 | 9 | -- Copyright (C) 1992-2023, Free Software Foundation, Inc. -- |
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10 | -- -- |
| 11 | -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 | -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 748086b7 | 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- -- |
| 15 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 748086b7 JJ |
16 | -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| 17 | -- -- | |
| 18 | -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 | -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 | -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 | -- -- | |
| 22 | -- You should have received a copy of the GNU General Public License and -- | |
| 23 | -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 | -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 | -- <http://www.gnu.org/licenses/>. -- | |
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26 | -- -- |
| 27 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 71ff80dc | 28 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
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29 | -- -- |
| 30 | ------------------------------------------------------------------------------ | |
| 31 | ||
| 1d5a85bd | 32 | with System; use System; |
| fbf5a39b | 33 | |
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34 | package body Ada.Command_Line is |
| 35 | ||
| 36 | function Arg_Count return Natural; | |
| 37 | pragma Import (C, Arg_Count, "__gnat_arg_count"); | |
| 38 | ||
| 39 | procedure Fill_Arg (A : System.Address; Arg_Num : Integer); | |
| 40 | pragma Import (C, Fill_Arg, "__gnat_fill_arg"); | |
| 41 | ||
| 42 | function Len_Arg (Arg_Num : Integer) return Integer; | |
| 43 | pragma Import (C, Len_Arg, "__gnat_len_arg"); | |
| 44 | ||
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45 | ----------------------- |
| 46 | -- Local Subprograms -- | |
| 47 | ----------------------- | |
| 48 | ||
| 49 | function Initialized return Boolean; | |
| 50 | -- Checks to ensure that gnat_argc and gnat_argv have been properly | |
| 51 | -- initialized. Returns false if not, or if argv / argc are | |
| 52 | -- unsupported on the target (e.g. VxWorks). | |
| 53 | ||
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54 | -------------- |
| 55 | -- Argument -- | |
| 56 | -------------- | |
| 57 | ||
| 0ae9f22f | 58 | function Argument (Number : Positive) return String is |
| d23b8f57 | 59 | begin |
| 7d827255 AC |
60 | if Number > Argument_Count then |
| 61 | raise Constraint_Error; | |
| 62 | end if; | |
| 63 | ||
| 64 | declare | |
| 65 | Num : constant Positive := | |
| 7ec25b2b | 66 | (if Remove_Args = null then Number else Remove_Args (Number)); |
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67 | Arg : aliased String (1 .. Len_Arg (Num)); |
| 68 | begin | |
| 69 | Fill_Arg (Arg'Address, Num); | |
| 70 | return Arg; | |
| 71 | end; | |
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72 | end Argument; |
| 73 | ||
| 74 | -------------------- | |
| 75 | -- Argument_Count -- | |
| 76 | -------------------- | |
| 77 | ||
| 78 | function Argument_Count return Natural is | |
| 79 | begin | |
| 8ce9496f SB |
80 | return |
| 81 | (if not Initialized then 0 -- RM A.15 (11) | |
| 82 | elsif Remove_Args = null then Arg_Count - 1 | |
| 83 | else Remove_Count | |
| 84 | ); | |
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85 | end Argument_Count; |
| 86 | ||
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87 | ----------------- |
| 88 | -- Initialized -- | |
| 89 | ----------------- | |
| 90 | ||
| 91 | function Initialized return Boolean is | |
| 92 | gnat_argv : System.Address; | |
| 93 | pragma Import (C, gnat_argv, "gnat_argv"); | |
| 94 | ||
| 95 | begin | |
| 96 | return gnat_argv /= System.Null_Address; | |
| 97 | end Initialized; | |
| 98 | ||
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99 | ------------------ |
| 100 | -- Command_Name -- | |
| 101 | ------------------ | |
| 102 | ||
| 103 | function Command_Name return String is | |
| d23b8f57 | 104 | begin |
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105 | pragma Annotate (Gnatcheck, Exempt_On, "Improper_Returns", |
| 106 | "early returns for performance"); | |
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107 | if not Initialized then |
| 108 | return ""; | |
| 109 | end if; | |
| 110 | ||
| 111 | declare | |
| 112 | Arg : aliased String (1 .. Len_Arg (0)); | |
| 113 | ||
| 114 | begin | |
| 115 | Fill_Arg (Arg'Address, 0); | |
| 116 | return Arg; | |
| 117 | end; | |
| 8ce9496f | 118 | pragma Annotate (Gnatcheck, Exempt_Off, "Improper_Returns"); |
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119 | end Command_Name; |
| 120 | ||
| 121 | end Ada.Command_Line; |