gcc/ada/a-colire.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --             A D A . C O M M A N D _ L I N E . R E M O V E                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1999-2006, Free Software Foundation, Inc.         --
  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- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  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 --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 package body Ada.Command_Line.Remove is
  35
  36    -----------------------
  37    -- Local Subprograms --
  38    -----------------------
  39
  40    procedure Initialize;
  41    --  Initialize the Remove_Count and Remove_Args variables
  42
  43    ----------------
  44    -- Initialize --
  45    ----------------
  46
  47    procedure Initialize is
  48    begin
  49       if Remove_Args = null then
  50          Remove_Count := Argument_Count;
  51          Remove_Args := new Arg_Nums (1 .. Argument_Count);
  52
  53          for J in Remove_Args'Range loop
  54             Remove_Args (J) := J;
  55          end loop;
  56       end if;
  57    end Initialize;
  58
  59    ---------------------
  60    -- Remove_Argument --
  61    ---------------------
  62
  63    procedure Remove_Argument (Number : Positive) is
  64    begin
  65       Initialize;
  66
  67       if Number > Remove_Count then
  68          raise Constraint_Error;
  69       end if;
  70
  71       Remove_Count := Remove_Count - 1;
  72
  73       for J in Number .. Remove_Count loop
  74          Remove_Args (J) := Remove_Args (J + 1);
  75       end loop;
  76    end Remove_Argument;
  77
  78    procedure Remove_Argument (Argument : String) is
  79    begin
  80       for J in reverse 1 .. Argument_Count loop
  81          if Argument = Ada.Command_Line.Argument (J) then
  82             Remove_Argument (J);
  83          end if;
  84       end loop;
  85    end Remove_Argument;
  86
  87    ----------------------
  88    -- Remove_Arguments --
  89    ----------------------
  90
  91    procedure Remove_Arguments (From : Positive; To : Natural) is
  92    begin
  93       Initialize;
  94
  95       if From > Remove_Count
  96         or else To > Remove_Count
  97       then
  98          raise Constraint_Error;
  99       end if;
 100
 101       if To >= From then
 102          Remove_Count := Remove_Count - (To - From + 1);
 103
 104          for J in From .. Remove_Count loop
 105             Remove_Args (J) := Remove_Args (J + (To - From + 1));
 106          end loop;
 107       end if;
 108    end Remove_Arguments;
 109
 110    procedure Remove_Arguments (Argument_Prefix : String) is
 111    begin
 112       for J in reverse 1 .. Argument_Count loop
 113          declare
 114             Arg : constant String := Argument (J);
 115
 116          begin
 117             if Arg'Length >= Argument_Prefix'Length
 118               and then Arg (1 .. Argument_Prefix'Length) = Argument_Prefix
 119             then
 120                Remove_Argument (J);
 121             end if;
 122          end;
 123       end loop;
 124    end Remove_Arguments;
 125
 126 end Ada.Command_Line.Remove;