/usr/share/ada/adainclude/gnatcoll/gnatcoll-arg_lists.adb is in libgnatcoll1.7-dev 1.7gpl2015-2+b3.
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-- G N A T C O L L --
-- --
-- Copyright (C) 2009-2015, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with GNAT.OS_Lib; use GNAT.OS_Lib;
with Ada.Unchecked_Deallocation;
with Ada.Containers; use Ada.Containers;
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Strings.Maps; use Ada.Strings.Maps;
with GNATCOLL.Scripts.Utils; use GNATCOLL.Scripts.Utils;
package body GNATCOLL.Arg_Lists is
procedure Parse_Command_Line_String
(CL : in out Arg_List;
Text : String);
-- Factor code between variants of Parse_String.
-- This processes Text as if it were passed on a command line (for instance
-- the bash command line) and adds the arguments to CL.
function Escape_Backslashes (A : Unbounded_String) return Unbounded_String;
-- Escape backslashes in A
------------------------
-- Escape_Backslashes --
------------------------
function Escape_Backslashes
(A : Unbounded_String) return Unbounded_String is
S : constant String := To_String (A);
R : Unbounded_String;
begin
for J in S'Range loop
case S (J) is
when '\' =>
Append (R, "\\");
when others =>
Append (R, S (J));
end case;
end loop;
return R;
end Escape_Backslashes;
-------------------------------
-- Parse_Command_Line_String --
-------------------------------
procedure Parse_Command_Line_String
(CL : in out Arg_List;
Text : String)
is
function Process (A : String) return Argument_Type;
-- Post-process on each argument returned by Argument_String_To_List
-------------
-- Process --
-------------
function Process (A : String) return Argument_Type is
begin
if A = "" then
return (One_Arg, Null_Unbounded_String);
end if;
-- Argument_String_To_List does not remove single quotes around an
-- argument: do this now.
if A (A'First) = '"' and then A (A'Last) = '"' then
return (One_Arg,
To_Unbounded_String (A (A'First + 1 .. A'Last - 1)));
end if;
return (Expandable, To_Unbounded_String (A));
end Process;
Local_Args : Argument_List_Access;
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Argument_List, Argument_List_Access);
begin
-- If we are parsing an argument in Separate_Args mode, get rid of the
-- leading spaces, as this would result in multiple arguments in
-- the call to Argument_String_To_List_With_Triple_Quotes
-- Also remove trailing spaces, since otherwise the last argument on
-- the command line, when surrounded with quotes, will be seen by
-- Process as ending with ASCII.LF, and therefore the quotes will not be
-- removed.
if CL.Mode = Separate_Args then
Local_Args := Argument_String_To_List_With_Triple_Quotes
(Trim
(Text,
Left => To_Set (' ' & ASCII.LF & ASCII.HT),
Right => To_Set (' ' & ASCII.LF & ASCII.HT)));
else
Local_Args := Argument_String_To_List_With_Triple_Quotes (Text);
end if;
if Local_Args = null then
return;
end if;
for J in Local_Args'Range loop
CL.V.Append (Process (Local_Args (J).all));
Free (Local_Args (J));
end loop;
Unchecked_Free (Local_Args);
end Parse_Command_Line_String;
------------------
-- Parse_String --
------------------
function Parse_String
(Text : String;
Mode : Command_Line_Mode) return Arg_List
is
CL : Arg_List;
begin
CL.Mode := Mode;
if Mode = Separate_Args then
Parse_Command_Line_String (CL, Text);
else
CL.V.Append ((One_Arg, To_Unbounded_String (Text)));
end if;
return CL;
end Parse_String;
------------------
-- Parse_String --
------------------
function Parse_String
(Command : String; Text : String) return Arg_List
is
CL : Arg_List := Create (Command);
begin
Parse_Command_Line_String (CL, Text);
return CL;
end Parse_String;
-----------------
-- Get_Command --
-----------------
function Get_Command (C : Arg_List) return String is
begin
if C.V.Is_Empty then
return "";
else
return To_String (C.V.Element (0).Text);
end if;
end Get_Command;
------------
-- Create --
------------
function Create (Command : String) return Arg_List is
C : Arg_List;
begin
C.V.Append ((One_Arg, To_Unbounded_String (Command)));
return C;
end Create;
---------------------
-- Append_Argument --
---------------------
procedure Append_Argument
(C : in out Arg_List;
Argument : String;
Mode : Argument_Mode) is
begin
C.V.Append ((Mode, To_Unbounded_String (Argument)));
end Append_Argument;
-------------
-- To_List --
-------------
function To_List
(C : Arg_List;
Include_Command : Boolean) return GNAT.OS_Lib.Argument_List
is
First : Natural;
begin
if Include_Command then
First := 0;
else
First := 1;
end if;
declare
L : GNAT.OS_Lib.Argument_List (1 .. Natural (C.V.Length) - First);
begin
for J in First .. Natural (C.V.Length) - 1 loop
L (J + 1 - First) := new String'
(To_String (C.V.Element (J).Text));
end loop;
return L;
end;
end To_List;
-----------------------
-- To_Display_String --
-----------------------
function To_Display_String
(C : Arg_List;
Include_Command : Boolean := True;
Max_Arg_Length : Positive := Positive'Last) return String
is
Result : Unbounded_String := To_Unbounded_String ("");
Start : Natural := 1;
begin
if not Include_Command then
Start := 2;
end if;
for Index in Start .. Natural (C.V.Length) loop
declare
Arg_Len : constant Natural :=
Length (C.V.Element (Index - 1).Text);
begin
if Arg_Len > Max_Arg_Length then
Append
(Result,
Unbounded_Slice (C.V.Element (Index - 1).Text,
1, Max_Arg_Length - 1));
Append (Result, "...");
else
Append (Result, C.V.Element (Index - 1).Text);
end if;
end;
if Index < Natural (C.V.Length) then
Append (Result, " ");
end if;
end loop;
return To_String (Result);
end To_Display_String;
---------------------
-- To_Debug_String --
---------------------
function To_Debug_String (C : Arg_List) return String is
Result : Unbounded_String := To_Unbounded_String ("Command: ");
begin
Append (Result, C.V.Element (0).Text);
for J in 1 .. Natural (C.V.Length) - 1 loop
Append (Result, ASCII.LF & "Arg: " & C.V.Element (J).Text);
end loop;
return To_String (Result);
end To_Debug_String;
----------------------
-- To_Script_String --
----------------------
function To_Script_String (C : Arg_List) return String is
function Arg (A : Unbounded_String) return Unbounded_String;
-- Auxiliary function to process one arg
---------
-- Arg --
---------
function Arg (A : Unbounded_String) return Unbounded_String is
S : constant String := To_String (A);
R : Unbounded_String;
begin
for J in S'Range loop
case S (J) is
when '\' =>
Append (R, "\\");
when ' ' =>
Append (R, "\ ");
when '"' =>
Append (R, "\""");
when others =>
Append (R, S (J));
end case;
end loop;
return R;
end Arg;
Result : Unbounded_String;
begin
if C = Empty_Command_Line then
return "";
end if;
if C.Mode = Raw_String then
return To_String (C.V.Element (0).Text);
end if;
-- Convert all arguments
for J in 1 .. Natural (C.V.Length) loop
Append (Result, Arg (C.V.Element (J - 1).Text));
Append (Result, ' ');
end loop;
-- Return result without the trailing space
declare
R : constant String := To_String (Result);
begin
return R (R'First .. R'Last - 1);
end;
end To_Script_String;
----------------
-- Substitute --
----------------
procedure Substitute
(CL : in out Arg_List;
Char : Character;
Callback : Substitution_Function)
is
New_CL : Arg_List;
function Expand_In_String (A : Unbounded_String) return Unbounded_String;
-- Expand the argument in place in S and return the result
----------------------
-- Expand_In_String --
----------------------
function Expand_In_String
(A : Unbounded_String) return Unbounded_String
is
S : constant String := To_String (A);
U : Unbounded_String;
J : Natural;
Beg : Natural;
New_CL : Arg_List;
Skip_Ending_Bracket : Boolean := False;
begin
if S = "" then
return Null_Unbounded_String;
end if;
J := S'First;
while J <= S'Last loop
if S (J) = Char then
-- Skip to the next separator
J := J + 1;
Beg := J;
if S (J) = '{' then
-- An '{' immediately follows the special character:
-- the parameter should be the whole string contained
-- between this and the ending '}'.
Skip_Ending_Bracket := True;
J := J + 1;
Beg := J;
while J <= S'Last
and then S (J) /= '}'
loop
J := J + 1;
end loop;
else
Skip_Ending_Bracket := False;
while J <= S'Last
and then (Is_Alphanumeric (S (J))
or else S (J) = '*'
or else S (J) = '-'
or else S (J) = '@')
loop
J := J + 1;
end loop;
end if;
-- A doubling of the special character indicates that we
-- are inserting it.
if S (J - 1) = Char then
Append (U, Char);
J := J + 1;
else
New_CL := Callback (S (Beg .. J - 1), Raw_String);
for K in 0 .. Natural (New_CL.V.Length) - 1 loop
if CL.Mode = Raw_String then
Append
(U,
Escape_Backslashes (New_CL.V.Element (K).Text));
else
Append (U, New_CL.V.Element (K).Text);
end if;
if K < Natural (New_CL.V.Length) - 1 then
Append (U, ' ');
end if;
end loop;
end if;
if Skip_Ending_Bracket then
J := J + 1;
end if;
else
Append (U, S (J));
J := J + 1;
end if;
end loop;
return U;
end Expand_In_String;
begin
New_CL.Mode := CL.Mode;
if CL = Empty_Command_Line then
return;
end if;
if Callback = null then
return;
end if;
case CL.Mode is
when Raw_String =>
declare
U : constant Unbounded_String := Expand_In_String
(CL.V.Element (0).Text);
begin
CL.V.Replace_Element (0, (One_Arg, U));
end;
when Separate_Args =>
for J in 0 .. Natural (CL.V.Length) - 1 loop
case CL.V.Element (J).Mode is
when One_Arg =>
declare
U : constant Unbounded_String := Expand_In_String
(CL.V.Element (J).Text);
begin
New_CL.V.Append ((One_Arg, U));
end;
when Expandable =>
declare
P : constant Unbounded_String := CL.V.Element (J).Text;
begin
if Element (P, 1) = Char then
New_CL.V.Append
(Callback
(Slice (P, 2, Length (P)), Separate_Args).V);
else
New_CL.V.Append
((Expandable, Expand_In_String (P)));
end if;
end;
end case;
end loop;
CL := New_CL;
end case;
end Substitute;
-----------------
-- Args_Length --
-----------------
function Args_Length (C : Arg_List) return Integer is
begin
return Natural (C.V.Length) - 1;
end Args_Length;
-------------
-- Nth_Arg --
-------------
function Nth_Arg (C : Arg_List; N : Natural) return String is
begin
return To_String (C.V.Element (N).Text);
end Nth_Arg;
function Nth_Arg (C : Arg_List; N : Natural) return Unbounded_String is
begin
return C.V.Element (N).Text;
end Nth_Arg;
-----------------
-- Set_Nth_Arg --
-----------------
procedure Set_Nth_Arg (C : in out Arg_List; N : Natural; Arg : String) is
begin
-- If there are not enough arguments, create them
while N > Args_Length (C) loop
C.V.Append ((One_Arg, Null_Unbounded_String));
end loop;
C.V.Replace_Element
(N, (C.V.Element (N).Mode, To_Unbounded_String (Arg)));
end Set_Nth_Arg;
-----------------------------
-- Argument_List_To_String --
-----------------------------
-----------------------------
-- Argument_List_To_String --
-----------------------------
function Argument_List_To_String
(List : GNAT.Strings.String_List;
Protect_Quotes : Boolean := True) return String
is
Length : Natural := 0;
begin
for L in List'Range loop
Length := Length + List (L)'Length + 1;
if Protect_Quotes then
for S in List (L)'Range loop
if List (L)(S) = '"'
or else List (L)(S) = ' '
then
Length := Length + 1;
end if;
end loop;
end if;
end loop;
declare
S : String (1 .. Length);
Index : Positive := S'First;
begin
for L in List'Range loop
for J in List (L)'Range loop
if Protect_Quotes then
if List (L)(J) = '"' or else List (L)(J) = ' ' then
S (Index) := '\';
Index := Index + 1;
end if;
end if;
S (Index) := List (L)(J);
Index := Index + 1;
end loop;
S (Index) := ' ';
Index := Index + 1;
end loop;
return S (1 .. S'Last - 1); -- Ignore last space
end;
end Argument_List_To_String;
end GNATCOLL.Arg_Lists;
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