------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . C O M M A N D _ L I N E --
-- --
-- B o d y --
-- --
-- Copyright (C) 1999-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- 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 --
-- . --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Unchecked_Deallocation;
with Ada.Strings.Unbounded;
with GNAT.OS_Lib; use GNAT.OS_Lib;
package body GNAT.Command_Line is
package CL renames Ada.Command_Line;
type Switch_Parameter_Type is
(Parameter_None,
Parameter_With_Optional_Space, -- ':' in getopt
Parameter_With_Space_Or_Equal, -- '=' in getopt
Parameter_No_Space, -- '!' in getopt
Parameter_Optional); -- '?' in getopt
procedure Set_Parameter
(Variable : out Parameter_Type;
Arg_Num : Positive;
First : Positive;
Last : Positive;
Extra : Character := ASCII.NUL);
pragma Inline (Set_Parameter);
-- Set the parameter that will be returned by Parameter below
-- Parameters need to be defined ???
function Goto_Next_Argument_In_Section (Parser : Opt_Parser) return Boolean;
-- Go to the next argument on the command line. If we are at the end of
-- the current section, we want to make sure there is no other identical
-- section on the command line (there might be multiple instances of
-- -largs). Returns True iff there is another argument.
function Get_File_Names_Case_Sensitive return Integer;
pragma Import (C, Get_File_Names_Case_Sensitive,
"__gnat_get_file_names_case_sensitive");
File_Names_Case_Sensitive : constant Boolean :=
Get_File_Names_Case_Sensitive /= 0;
procedure Canonical_Case_File_Name (S : in out String);
-- Given a file name, converts it to canonical case form. For systems where
-- file names are case sensitive, this procedure has no effect. If file
-- names are not case sensitive (i.e. for example if you have the file
-- "xyz.adb", you can refer to it as XYZ.adb or XyZ.AdB), then this call
-- converts the given string to canonical all lower case form, so that two
-- file names compare equal if they refer to the same file.
procedure Internal_Initialize_Option_Scan
(Parser : Opt_Parser;
Switch_Char : Character;
Stop_At_First_Non_Switch : Boolean;
Section_Delimiters : String);
-- Initialize Parser, which must have been allocated already
function Argument (Parser : Opt_Parser; Index : Integer) return String;
-- Return the index-th command line argument
procedure Find_Longest_Matching_Switch
(Switches : String;
Arg : String;
Index_In_Switches : out Integer;
Switch_Length : out Integer;
Param : out Switch_Parameter_Type);
-- Return the Longest switch from Switches that at least partially
-- partially Arg. Index_In_Switches is set to 0 if none matches.
-- What are other parameters??? in particular Param is not always set???
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Argument_List, Argument_List_Access);
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Command_Line_Configuration_Record, Command_Line_Configuration);
procedure Remove (Line : in out Argument_List_Access; Index : Integer);
-- Remove a specific element from Line
procedure Add
(Line : in out Argument_List_Access;
Str : String_Access;
Before : Boolean := False);
-- Add a new element to Line. If Before is True, the item is inserted at
-- the beginning, else it is appended.
function Can_Have_Parameter (S : String) return Boolean;
-- True if S can have a parameter.
function Require_Parameter (S : String) return Boolean;
-- True if S requires a parameter.
function Actual_Switch (S : String) return String;
-- Remove any possible trailing '!', ':', '?' and '='
generic
with procedure Callback (Simple_Switch : String; Parameter : String);
procedure For_Each_Simple_Switch
(Cmd : Command_Line;
Switch : String;
Parameter : String := "";
Unalias : Boolean := True);
-- Breaks Switch into as simple switches as possible (expanding aliases and
-- ungrouping common prefixes when possible), and call Callback for each of
-- these.
procedure Sort_Sections
(Line : GNAT.OS_Lib.Argument_List_Access;
Sections : GNAT.OS_Lib.Argument_List_Access;
Params : GNAT.OS_Lib.Argument_List_Access);
-- Reorder the command line switches so that the switches belonging to a
-- section are grouped together.
procedure Group_Switches
(Cmd : Command_Line;
Result : Argument_List_Access;
Sections : Argument_List_Access;
Params : Argument_List_Access);
-- Group switches with common prefixes whenever possible. Once they have
-- been grouped, we also check items for possible aliasing.
procedure Alias_Switches
(Cmd : Command_Line;
Result : Argument_List_Access;
Params : Argument_List_Access);
-- When possible, replace one or more switches by an alias, i.e. a shorter
-- version.
function Looking_At
(Type_Str : String;
Index : Natural;
Substring : String) return Boolean;
-- Return True if the characters starting at Index in Type_Str are
-- equivalent to Substring.
--------------
-- Argument --
--------------
function Argument (Parser : Opt_Parser; Index : Integer) return String is
begin
if Parser.Arguments /= null then
return Parser.Arguments (Index + Parser.Arguments'First - 1).all;
else
return CL.Argument (Index);
end if;
end Argument;
------------------------------
-- Canonical_Case_File_Name --
------------------------------
procedure Canonical_Case_File_Name (S : in out String) is
begin
if not File_Names_Case_Sensitive then
for J in S'Range loop
if S (J) in 'A' .. 'Z' then
S (J) := Character'Val
(Character'Pos (S (J)) +
Character'Pos ('a') -
Character'Pos ('A'));
end if;
end loop;
end if;
end Canonical_Case_File_Name;
---------------
-- Expansion --
---------------
function Expansion (Iterator : Expansion_Iterator) return String is
use GNAT.Directory_Operations;
type Pointer is access all Expansion_Iterator;
It : constant Pointer := Iterator'Unrestricted_Access;
S : String (1 .. 1024);
Last : Natural;
Current : Depth := It.Current_Depth;
NL : Positive;
begin
-- It is assumed that a directory is opened at the current level.
-- Otherwise GNAT.Directory_Operations.Directory_Error will be raised
-- at the first call to Read.
loop
Read (It.Levels (Current).Dir, S, Last);
-- If we have exhausted the directory, close it and go back one level
if Last = 0 then
Close (It.Levels (Current).Dir);
-- If we are at level 1, we are finished; return an empty string
if Current = 1 then
return String'(1 .. 0 => ' ');
else
-- Otherwise continue with the directory at the previous level
Current := Current - 1;
It.Current_Depth := Current;
end if;
-- If this is a directory, that is neither "." or "..", attempt to
-- go to the next level.
elsif Is_Directory
(It.Dir_Name (1 .. It.Levels (Current).Name_Last) & S (1 .. Last))
and then S (1 .. Last) /= "."
and then S (1 .. Last) /= ".."
then
-- We can go to the next level only if we have not reached the
-- maximum depth,
if Current < It.Maximum_Depth then
NL := It.Levels (Current).Name_Last;
-- And if relative path of this new directory is not too long
if NL + Last + 1 < Max_Path_Length then
Current := Current + 1;
It.Current_Depth := Current;
It.Dir_Name (NL + 1 .. NL + Last) := S (1 .. Last);
NL := NL + Last + 1;
It.Dir_Name (NL) := Directory_Separator;
It.Levels (Current).Name_Last := NL;
Canonical_Case_File_Name (It.Dir_Name (1 .. NL));
-- Open the new directory, and read from it
GNAT.Directory_Operations.Open
(It.Levels (Current).Dir, It.Dir_Name (1 .. NL));
end if;
end if;
end if;
-- Check the relative path against the pattern
-- Note that we try to match also against directory names, since
-- clients of this function may expect to retrieve directories.
declare
Name : String :=
It.Dir_Name (It.Start .. It.Levels (Current).Name_Last)
& S (1 .. Last);
begin
Canonical_Case_File_Name (Name);
-- If it matches return the relative path
if GNAT.Regexp.Match (Name, Iterator.Regexp) then
return Name;
end if;
end;
end loop;
end Expansion;
-----------------
-- Full_Switch --
-----------------
function Full_Switch
(Parser : Opt_Parser := Command_Line_Parser) return String
is
begin
if Parser.The_Switch.Extra = ASCII.NUL then
return Argument (Parser, Parser.The_Switch.Arg_Num)
(Parser.The_Switch.First .. Parser.The_Switch.Last);
else
return Parser.The_Switch.Extra
& Argument (Parser, Parser.The_Switch.Arg_Num)
(Parser.The_Switch.First .. Parser.The_Switch.Last);
end if;
end Full_Switch;
------------------
-- Get_Argument --
------------------
function Get_Argument
(Do_Expansion : Boolean := False;
Parser : Opt_Parser := Command_Line_Parser) return String
is
begin
if Parser.In_Expansion then
declare
S : constant String := Expansion (Parser.Expansion_It);
begin
if S'Length /= 0 then
return S;
else
Parser.In_Expansion := False;
end if;
end;
end if;
if Parser.Current_Argument > Parser.Arg_Count then
-- If this is the first time this function is called
if Parser.Current_Index = 1 then
Parser.Current_Argument := 1;
while Parser.Current_Argument <= Parser.Arg_Count
and then Parser.Section (Parser.Current_Argument) /=
Parser.Current_Section
loop
Parser.Current_Argument := Parser.Current_Argument + 1;
end loop;
else
return String'(1 .. 0 => ' ');
end if;
elsif Parser.Section (Parser.Current_Argument) = 0 then
while Parser.Current_Argument <= Parser.Arg_Count
and then Parser.Section (Parser.Current_Argument) /=
Parser.Current_Section
loop
Parser.Current_Argument := Parser.Current_Argument + 1;
end loop;
end if;
Parser.Current_Index := Integer'Last;
while Parser.Current_Argument <= Parser.Arg_Count
and then Parser.Is_Switch (Parser.Current_Argument)
loop
Parser.Current_Argument := Parser.Current_Argument + 1;
end loop;
if Parser.Current_Argument > Parser.Arg_Count then
return String'(1 .. 0 => ' ');
elsif Parser.Section (Parser.Current_Argument) = 0 then
return Get_Argument (Do_Expansion);
end if;
Parser.Current_Argument := Parser.Current_Argument + 1;
-- Could it be a file name with wild cards to expand?
if Do_Expansion then
declare
Arg : constant String :=
Argument (Parser, Parser.Current_Argument - 1);
Index : Positive;
begin
Index := Arg'First;
while Index <= Arg'Last loop
if Arg (Index) = '*'
or else Arg (Index) = '?'
or else Arg (Index) = '['
then
Parser.In_Expansion := True;
Start_Expansion (Parser.Expansion_It, Arg);
return Get_Argument (Do_Expansion);
end if;
Index := Index + 1;
end loop;
end;
end if;
return Argument (Parser, Parser.Current_Argument - 1);
end Get_Argument;
----------------------------------
-- Find_Longest_Matching_Switch --
----------------------------------
procedure Find_Longest_Matching_Switch
(Switches : String;
Arg : String;
Index_In_Switches : out Integer;
Switch_Length : out Integer;
Param : out Switch_Parameter_Type)
is
Index : Natural;
Length : Natural := 1;
P : Switch_Parameter_Type;
begin
Index_In_Switches := 0;
Switch_Length := 0;
-- Remove all leading spaces first to make sure that Index points
-- at the start of the first switch.
Index := Switches'First;
while Index <= Switches'Last and then Switches (Index) = ' ' loop
Index := Index + 1;
end loop;
while Index <= Switches'Last loop
-- Search the length of the parameter at this position in Switches
Length := Index;
while Length <= Switches'Last
and then Switches (Length) /= ' '
loop
Length := Length + 1;
end loop;
if Length = Index + 1 then
P := Parameter_None;
else
case Switches (Length - 1) is
when ':' =>
P := Parameter_With_Optional_Space;
Length := Length - 1;
when '=' =>
P := Parameter_With_Space_Or_Equal;
Length := Length - 1;
when '!' =>
P := Parameter_No_Space;
Length := Length - 1;
when '?' =>
P := Parameter_Optional;
Length := Length - 1;
when others =>
P := Parameter_None;
end case;
end if;
-- If it is the one we searched, it may be a candidate
if Arg'First + Length - 1 - Index <= Arg'Last
and then Switches (Index .. Length - 1) =
Arg (Arg'First .. Arg'First + Length - 1 - Index)
and then Length - Index > Switch_Length
then
Param := P;
Index_In_Switches := Index;
Switch_Length := Length - Index;
end if;
-- Look for the next switch in Switches
while Index <= Switches'Last
and then Switches (Index) /= ' '
loop
Index := Index + 1;
end loop;
Index := Index + 1;
end loop;
end Find_Longest_Matching_Switch;
------------
-- Getopt --
------------
function Getopt
(Switches : String;
Concatenate : Boolean := True;
Parser : Opt_Parser := Command_Line_Parser) return Character
is
Dummy : Boolean;
pragma Unreferenced (Dummy);
begin
<>
-- If we have finished parsing the current command line item (there
-- might be multiple switches in a single item), then go to the next
-- element
if Parser.Current_Argument > Parser.Arg_Count
or else (Parser.Current_Index >
Argument (Parser, Parser.Current_Argument)'Last
and then not Goto_Next_Argument_In_Section (Parser))
then
return ASCII.NUL;
end if;
-- By default, the switch will not have a parameter
Parser.The_Parameter :=
(Integer'Last, Integer'Last, Integer'Last - 1, ASCII.NUL);
Parser.The_Separator := ASCII.NUL;
declare
Arg : constant String :=
Argument (Parser, Parser.Current_Argument);
Index_Switches : Natural := 0;
Max_Length : Natural := 0;
End_Index : Natural;
Param : Switch_Parameter_Type;
begin
-- If we are on a new item, test if this might be a switch
if Parser.Current_Index = Arg'First then
if Arg (Arg'First) /= Parser.Switch_Character then
-- If it isn't a switch, return it immediately. We also know it
-- isn't the parameter to a previous switch, since that has
-- already been handled
if Switches (Switches'First) = '*' then
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Arg'First,
Last => Arg'Last);
Parser.Is_Switch (Parser.Current_Argument) := True;
Dummy := Goto_Next_Argument_In_Section (Parser);
return '*';
end if;
if Parser.Stop_At_First then
Parser.Current_Argument := Positive'Last;
return ASCII.NUL;
elsif not Goto_Next_Argument_In_Section (Parser) then
return ASCII.NUL;
else
-- Recurse to get the next switch on the command line
goto Restart;
end if;
end if;
-- We are on the first character of a new command line argument,
-- which starts with Switch_Character. Further analysis is needed.
Parser.Current_Index := Parser.Current_Index + 1;
Parser.Is_Switch (Parser.Current_Argument) := True;
end if;
Find_Longest_Matching_Switch
(Switches => Switches,
Arg => Arg (Parser.Current_Index .. Arg'Last),
Index_In_Switches => Index_Switches,
Switch_Length => Max_Length,
Param => Param);
-- If switch is not accepted, it is either invalid or is returned
-- in the context of '*'.
if Index_Switches = 0 then
-- Depending on the value of Concatenate, the full switch is
-- a single character or the rest of the argument.
if Concatenate then
End_Index := Parser.Current_Index;
else
End_Index := Arg'Last;
end if;
if Switches (Switches'First) = '*' then
-- Always prepend the switch character, so that users know that
-- this comes from a switch on the command line. This is
-- especially important when Concatenate is False, since
-- otherwise the current argument first character is lost.
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Parser.Current_Index,
Last => Arg'Last,
Extra => Parser.Switch_Character);
Parser.Is_Switch (Parser.Current_Argument) := True;
Dummy := Goto_Next_Argument_In_Section (Parser);
return '*';
end if;
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Parser.Current_Index,
Last => End_Index);
Parser.Current_Index := End_Index + 1;
raise Invalid_Switch;
end if;
End_Index := Parser.Current_Index + Max_Length - 1;
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Parser.Current_Index,
Last => End_Index);
case Param is
when Parameter_With_Optional_Space =>
if End_Index < Arg'Last then
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => End_Index + 1,
Last => Arg'Last);
Dummy := Goto_Next_Argument_In_Section (Parser);
elsif Parser.Current_Argument < Parser.Arg_Count
and then Parser.Section (Parser.Current_Argument + 1) /= 0
then
Parser.Current_Argument := Parser.Current_Argument + 1;
Parser.The_Separator := ' ';
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => Argument (Parser, Parser.Current_Argument)'First,
Last => Argument (Parser, Parser.Current_Argument)'Last);
Parser.Is_Switch (Parser.Current_Argument) := True;
Dummy := Goto_Next_Argument_In_Section (Parser);
else
Parser.Current_Index := End_Index + 1;
raise Invalid_Parameter;
end if;
when Parameter_With_Space_Or_Equal =>
-- If the switch is of the form =xxx
if End_Index < Arg'Last then
if Arg (End_Index + 1) = '='
and then End_Index + 1 < Arg'Last
then
Parser.The_Separator := '=';
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => End_Index + 2,
Last => Arg'Last);
Dummy := Goto_Next_Argument_In_Section (Parser);
else
Parser.Current_Index := End_Index + 1;
raise Invalid_Parameter;
end if;
-- If the switch is of the form xxx
elsif Parser.Current_Argument < Parser.Arg_Count
and then Parser.Section (Parser.Current_Argument + 1) /= 0
then
Parser.Current_Argument := Parser.Current_Argument + 1;
Parser.The_Separator := ' ';
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => Argument (Parser, Parser.Current_Argument)'First,
Last => Argument (Parser, Parser.Current_Argument)'Last);
Parser.Is_Switch (Parser.Current_Argument) := True;
Dummy := Goto_Next_Argument_In_Section (Parser);
else
Parser.Current_Index := End_Index + 1;
raise Invalid_Parameter;
end if;
when Parameter_No_Space =>
if End_Index < Arg'Last then
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => End_Index + 1,
Last => Arg'Last);
Dummy := Goto_Next_Argument_In_Section (Parser);
else
Parser.Current_Index := End_Index + 1;
raise Invalid_Parameter;
end if;
when Parameter_Optional =>
if End_Index < Arg'Last then
Set_Parameter
(Parser.The_Parameter,
Arg_Num => Parser.Current_Argument,
First => End_Index + 1,
Last => Arg'Last);
end if;
Dummy := Goto_Next_Argument_In_Section (Parser);
when Parameter_None =>
if Concatenate or else End_Index = Arg'Last then
Parser.Current_Index := End_Index + 1;
else
-- If Concatenate is False and the full argument is not
-- recognized as a switch, this is an invalid switch.
if Switches (Switches'First) = '*' then
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Arg'First,
Last => Arg'Last);
Parser.Is_Switch (Parser.Current_Argument) := True;
Dummy := Goto_Next_Argument_In_Section (Parser);
return '*';
end if;
Set_Parameter
(Parser.The_Switch,
Arg_Num => Parser.Current_Argument,
First => Parser.Current_Index,
Last => Arg'Last);
Parser.Current_Index := Arg'Last + 1;
raise Invalid_Switch;
end if;
end case;
return Switches (Index_Switches);
end;
end Getopt;
-----------------------------------
-- Goto_Next_Argument_In_Section --
-----------------------------------
function Goto_Next_Argument_In_Section
(Parser : Opt_Parser) return Boolean
is
begin
Parser.Current_Argument := Parser.Current_Argument + 1;
if Parser.Current_Argument > Parser.Arg_Count
or else Parser.Section (Parser.Current_Argument) = 0
then
loop
Parser.Current_Argument := Parser.Current_Argument + 1;
if Parser.Current_Argument > Parser.Arg_Count then
Parser.Current_Index := 1;
return False;
end if;
exit when Parser.Section (Parser.Current_Argument) =
Parser.Current_Section;
end loop;
end if;
Parser.Current_Index :=
Argument (Parser, Parser.Current_Argument)'First;
return True;
end Goto_Next_Argument_In_Section;
------------------
-- Goto_Section --
------------------
procedure Goto_Section
(Name : String := "";
Parser : Opt_Parser := Command_Line_Parser)
is
Index : Integer;
begin
Parser.In_Expansion := False;
if Name = "" then
Parser.Current_Argument := 1;
Parser.Current_Index := 1;
Parser.Current_Section := 1;
return;
end if;
Index := 1;
while Index <= Parser.Arg_Count loop
if Parser.Section (Index) = 0
and then Argument (Parser, Index) = Parser.Switch_Character & Name
then
Parser.Current_Argument := Index + 1;
Parser.Current_Index := 1;
if Parser.Current_Argument <= Parser.Arg_Count then
Parser.Current_Section :=
Parser.Section (Parser.Current_Argument);
end if;
return;
end if;
Index := Index + 1;
end loop;
Parser.Current_Argument := Positive'Last;
Parser.Current_Index := 2; -- so that Get_Argument returns nothing
end Goto_Section;
----------------------------
-- Initialize_Option_Scan --
----------------------------
procedure Initialize_Option_Scan
(Switch_Char : Character := '-';
Stop_At_First_Non_Switch : Boolean := False;
Section_Delimiters : String := "")
is
begin
Internal_Initialize_Option_Scan
(Parser => Command_Line_Parser,
Switch_Char => Switch_Char,
Stop_At_First_Non_Switch => Stop_At_First_Non_Switch,
Section_Delimiters => Section_Delimiters);
end Initialize_Option_Scan;
----------------------------
-- Initialize_Option_Scan --
----------------------------
procedure Initialize_Option_Scan
(Parser : out Opt_Parser;
Command_Line : GNAT.OS_Lib.Argument_List_Access;
Switch_Char : Character := '-';
Stop_At_First_Non_Switch : Boolean := False;
Section_Delimiters : String := "")
is
begin
Free (Parser);
if Command_Line = null then
Parser := new Opt_Parser_Data (CL.Argument_Count);
Initialize_Option_Scan
(Switch_Char => Switch_Char,
Stop_At_First_Non_Switch => Stop_At_First_Non_Switch,
Section_Delimiters => Section_Delimiters);
else
Parser := new Opt_Parser_Data (Command_Line'Length);
Parser.Arguments := Command_Line;
Internal_Initialize_Option_Scan
(Parser => Parser,
Switch_Char => Switch_Char,
Stop_At_First_Non_Switch => Stop_At_First_Non_Switch,
Section_Delimiters => Section_Delimiters);
end if;
end Initialize_Option_Scan;
-------------------------------------
-- Internal_Initialize_Option_Scan --
-------------------------------------
procedure Internal_Initialize_Option_Scan
(Parser : Opt_Parser;
Switch_Char : Character;
Stop_At_First_Non_Switch : Boolean;
Section_Delimiters : String)
is
Section_Num : Section_Number;
Section_Index : Integer;
Last : Integer;
Delimiter_Found : Boolean;
Discard : Boolean;
pragma Warnings (Off, Discard);
begin
Parser.Current_Argument := 0;
Parser.Current_Index := 0;
Parser.In_Expansion := False;
Parser.Switch_Character := Switch_Char;
Parser.Stop_At_First := Stop_At_First_Non_Switch;
Parser.Section := (others => 1);
-- If we are using sections, we have to preprocess the command line
-- to delimit them. A section can be repeated, so we just give each
-- item on the command line a section number
Section_Num := 1;
Section_Index := Section_Delimiters'First;
while Section_Index <= Section_Delimiters'Last loop
Last := Section_Index;
while Last <= Section_Delimiters'Last
and then Section_Delimiters (Last) /= ' '
loop
Last := Last + 1;
end loop;
Delimiter_Found := False;
Section_Num := Section_Num + 1;
for Index in 1 .. Parser.Arg_Count loop
if Argument (Parser, Index)(1) = Parser.Switch_Character
and then
Argument (Parser, Index) = Parser.Switch_Character &
Section_Delimiters
(Section_Index .. Last - 1)
then
Parser.Section (Index) := 0;
Delimiter_Found := True;
elsif Parser.Section (Index) = 0 then
Delimiter_Found := False;
elsif Delimiter_Found then
Parser.Section (Index) := Section_Num;
end if;
end loop;
Section_Index := Last + 1;
while Section_Index <= Section_Delimiters'Last
and then Section_Delimiters (Section_Index) = ' '
loop
Section_Index := Section_Index + 1;
end loop;
end loop;
Discard := Goto_Next_Argument_In_Section (Parser);
end Internal_Initialize_Option_Scan;
---------------
-- Parameter --
---------------
function Parameter
(Parser : Opt_Parser := Command_Line_Parser) return String
is
begin
if Parser.The_Parameter.First > Parser.The_Parameter.Last then
return String'(1 .. 0 => ' ');
else
return Argument (Parser, Parser.The_Parameter.Arg_Num)
(Parser.The_Parameter.First .. Parser.The_Parameter.Last);
end if;
end Parameter;
---------------
-- Separator --
---------------
function Separator
(Parser : Opt_Parser := Command_Line_Parser) return Character
is
begin
return Parser.The_Separator;
end Separator;
-------------------
-- Set_Parameter --
-------------------
procedure Set_Parameter
(Variable : out Parameter_Type;
Arg_Num : Positive;
First : Positive;
Last : Positive;
Extra : Character := ASCII.NUL)
is
begin
Variable.Arg_Num := Arg_Num;
Variable.First := First;
Variable.Last := Last;
Variable.Extra := Extra;
end Set_Parameter;
---------------------
-- Start_Expansion --
---------------------
procedure Start_Expansion
(Iterator : out Expansion_Iterator;
Pattern : String;
Directory : String := "";
Basic_Regexp : Boolean := True)
is
Directory_Separator : Character;
pragma Import (C, Directory_Separator, "__gnat_dir_separator");
First : Positive := Pattern'First;
Pat : String := Pattern;
begin
Canonical_Case_File_Name (Pat);
Iterator.Current_Depth := 1;
-- If Directory is unspecified, use the current directory ("./" or ".\")
if Directory = "" then
Iterator.Dir_Name (1 .. 2) := "." & Directory_Separator;
Iterator.Start := 3;
else
Iterator.Dir_Name (1 .. Directory'Length) := Directory;
Iterator.Start := Directory'Length + 1;
Canonical_Case_File_Name (Iterator.Dir_Name (1 .. Directory'Length));
-- Make sure that the last character is a directory separator
if Directory (Directory'Last) /= Directory_Separator then
Iterator.Dir_Name (Iterator.Start) := Directory_Separator;
Iterator.Start := Iterator.Start + 1;
end if;
end if;
Iterator.Levels (1).Name_Last := Iterator.Start - 1;
-- Open the initial Directory, at depth 1
GNAT.Directory_Operations.Open
(Iterator.Levels (1).Dir, Iterator.Dir_Name (1 .. Iterator.Start - 1));
-- If in the current directory and the pattern starts with "./" or ".\",
-- drop the "./" or ".\" from the pattern.
if Directory = "" and then Pat'Length > 2
and then Pat (Pat'First) = '.'
and then Pat (Pat'First + 1) = Directory_Separator
then
First := Pat'First + 2;
end if;
Iterator.Regexp :=
GNAT.Regexp.Compile (Pat (First .. Pat'Last), Basic_Regexp, True);
Iterator.Maximum_Depth := 1;
-- Maximum_Depth is equal to 1 plus the number of directory separators
-- in the pattern.
for Index in First .. Pat'Last loop
if Pat (Index) = Directory_Separator then
Iterator.Maximum_Depth := Iterator.Maximum_Depth + 1;
exit when Iterator.Maximum_Depth = Max_Depth;
end if;
end loop;
end Start_Expansion;
----------
-- Free --
----------
procedure Free (Parser : in out Opt_Parser) is
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Opt_Parser_Data, Opt_Parser);
begin
if Parser /= null
and then Parser /= Command_Line_Parser
then
Free (Parser.Arguments);
Unchecked_Free (Parser);
end if;
end Free;
------------------
-- Define_Alias --
------------------
procedure Define_Alias
(Config : in out Command_Line_Configuration;
Switch : String;
Expanded : String)
is
begin
if Config = null then
Config := new Command_Line_Configuration_Record;
end if;
Add (Config.Aliases, new String'(Switch));
Add (Config.Expansions, new String'(Expanded));
end Define_Alias;
-------------------
-- Define_Prefix --
-------------------
procedure Define_Prefix
(Config : in out Command_Line_Configuration;
Prefix : String)
is
begin
if Config = null then
Config := new Command_Line_Configuration_Record;
end if;
Add (Config.Prefixes, new String'(Prefix));
end Define_Prefix;
-------------------
-- Define_Switch --
-------------------
procedure Define_Switch
(Config : in out Command_Line_Configuration;
Switch : String)
is
begin
if Config = null then
Config := new Command_Line_Configuration_Record;
end if;
Add (Config.Switches, new String'(Switch));
end Define_Switch;
--------------------
-- Define_Section --
--------------------
procedure Define_Section
(Config : in out Command_Line_Configuration;
Section : String)
is
begin
if Config = null then
Config := new Command_Line_Configuration_Record;
end if;
Add (Config.Sections, new String'(Section));
end Define_Section;
------------------
-- Get_Switches --
------------------
function Get_Switches
(Config : Command_Line_Configuration;
Switch_Char : Character)
return String
is
Ret : Ada.Strings.Unbounded.Unbounded_String;
use type Ada.Strings.Unbounded.Unbounded_String;
begin
if Config = null or else Config.Switches = null then
return "";
end if;
for J in Config.Switches'Range loop
if Config.Switches (J) (Config.Switches (J)'First) = Switch_Char then
Ret :=
Ret & " " &
Config.Switches (J)
(Config.Switches (J)'First + 1 .. Config.Switches (J)'Last);
else
Ret := Ret & " " & Config.Switches (J).all;
end if;
end loop;
return Ada.Strings.Unbounded.To_String (Ret);
end Get_Switches;
-----------------------
-- Set_Configuration --
-----------------------
procedure Set_Configuration
(Cmd : in out Command_Line;
Config : Command_Line_Configuration)
is
begin
Cmd.Config := Config;
end Set_Configuration;
-----------------------
-- Get_Configuration --
-----------------------
function Get_Configuration
(Cmd : Command_Line) return Command_Line_Configuration is
begin
return Cmd.Config;
end Get_Configuration;
----------------------
-- Set_Command_Line --
----------------------
procedure Set_Command_Line
(Cmd : in out Command_Line;
Switches : String;
Getopt_Description : String := "";
Switch_Char : Character := '-')
is
Tmp : Argument_List_Access;
Parser : Opt_Parser;
S : Character;
Section : String_Access := null;
function Real_Full_Switch
(S : Character;
Parser : Opt_Parser) return String;
-- Ensure that the returned switch value contains the
-- Switch_Char prefix if needed.
----------------------
-- Real_Full_Switch --
----------------------
function Real_Full_Switch
(S : Character;
Parser : Opt_Parser) return String
is
begin
if S = '*' then
return Full_Switch (Parser);
else
return Switch_Char & Full_Switch (Parser);
end if;
end Real_Full_Switch;
-- Start of processing for Set_Command_Line
begin
Free (Cmd.Expanded);
Free (Cmd.Params);
if Switches /= "" then
Tmp := Argument_String_To_List (Switches);
Initialize_Option_Scan (Parser, Tmp, Switch_Char);
loop
begin
S := Getopt (Switches => "* " & Getopt_Description,
Concatenate => False,
Parser => Parser);
exit when S = ASCII.NUL;
declare
Sw : constant String :=
Real_Full_Switch (S, Parser);
Is_Section : Boolean := False;
begin
if Cmd.Config /= null
and then Cmd.Config.Sections /= null
then
Section_Search :
for S in Cmd.Config.Sections'Range loop
if Sw = Cmd.Config.Sections (S).all then
Section := Cmd.Config.Sections (S);
Is_Section := True;
exit Section_Search;
end if;
end loop Section_Search;
end if;
if not Is_Section then
if Section = null then
-- Work around some weird cases: some switches may
-- expect parameters, but have the same value as
-- longer switches: -gnaty3 (-gnaty, parameter=3) and
-- -gnatya (-gnatya, no parameter).
-- So we are calling add_switch here with parameter
-- attached. This will be anyway correctly handled by
-- Add_Switch if -gnaty3 is actually provided.
if Separator (Parser) = ASCII.NUL then
Add_Switch
(Cmd, Sw & Parameter (Parser), "", ASCII.NUL);
else
Add_Switch
(Cmd, Sw, Parameter (Parser), Separator (Parser));
end if;
else
if Separator (Parser) = ASCII.NUL then
Add_Switch
(Cmd, Sw & Parameter (Parser), "",
Separator (Parser),
Section.all);
else
Add_Switch
(Cmd, Sw,
Parameter (Parser),
Separator (Parser),
Section.all);
end if;
end if;
end if;
end;
exception
when Invalid_Parameter =>
-- Add it with no parameter, if that's the way the user
-- wants it.
-- Specify the separator in all cases, as the switch might
-- need to be unaliased, and the alias might contain
-- switches with parameters.
if Section = null then
Add_Switch
(Cmd, Switch_Char & Full_Switch (Parser),
Separator => Separator (Parser));
else
Add_Switch
(Cmd, Switch_Char & Full_Switch (Parser),
Separator => Separator (Parser),
Section => Section.all);
end if;
end;
end loop;
Free (Parser);
end if;
end Set_Command_Line;
----------------
-- Looking_At --
----------------
function Looking_At
(Type_Str : String;
Index : Natural;
Substring : String) return Boolean is
begin
return Index + Substring'Length - 1 <= Type_Str'Last
and then Type_Str (Index .. Index + Substring'Length - 1) = Substring;
end Looking_At;
------------------------
-- Can_Have_Parameter --
------------------------
function Can_Have_Parameter (S : String) return Boolean is
begin
if S'Length <= 1 then
return False;
end if;
case S (S'Last) is
when '!' | ':' | '?' | '=' =>
return True;
when others =>
return False;
end case;
end Can_Have_Parameter;
-----------------------
-- Require_Parameter --
-----------------------
function Require_Parameter (S : String) return Boolean is
begin
if S'Length <= 1 then
return False;
end if;
case S (S'Last) is
when '!' | ':' | '=' =>
return True;
when others =>
return False;
end case;
end Require_Parameter;
-------------------
-- Actual_Switch --
-------------------
function Actual_Switch (S : String) return String is
begin
if S'Length <= 1 then
return S;
end if;
case S (S'Last) is
when '!' | ':' | '?' | '=' =>
return S (S'First .. S'Last - 1);
when others =>
return S;
end case;
end Actual_Switch;
----------------------------
-- For_Each_Simple_Switch --
----------------------------
procedure For_Each_Simple_Switch
(Cmd : Command_Line;
Switch : String;
Parameter : String := "";
Unalias : Boolean := True)
is
function Group_Analysis
(Prefix : String;
Group : String) return Boolean;
-- Perform the analysis of a group of switches
--------------------
-- Group_Analysis --
--------------------
function Group_Analysis
(Prefix : String;
Group : String) return Boolean
is
Idx : Natural;
Found : Boolean;
begin
Idx := Group'First;
while Idx <= Group'Last loop
Found := False;
for S in Cmd.Config.Switches'Range loop
declare
Sw : constant String :=
Actual_Switch
(Cmd.Config.Switches (S).all);
Full : constant String :=
Prefix & Group (Idx .. Group'Last);
Last : Natural;
Param : Natural;
begin
if Sw'Length >= Prefix'Length
-- Verify that sw starts with Prefix
and then Looking_At (Sw, Sw'First, Prefix)
-- Verify that the group starts with sw
and then Looking_At (Full, Full'First, Sw)
then
Last := Idx + Sw'Length - Prefix'Length - 1;
Param := Last + 1;
if Can_Have_Parameter (Cmd.Config.Switches (S).all) then
-- Include potential parameter to the recursive call.
-- Only numbers are allowed.
while Last < Group'Last
and then Group (Last + 1) in '0' .. '9'
loop
Last := Last + 1;
end loop;
end if;
if not Require_Parameter (Cmd.Config.Switches (S).all)
or else Last >= Param
then
if Idx = Group'First
and then Last = Group'Last
and then Last < Param
then
-- The group only concerns a single switch. Do not
-- perform recursive call.
-- Note that we still perform a recursive call if
-- a parameter is detected in the switch, as this
-- is a way to correctly identify such a parameter
-- in aliases.
return False;
end if;
Found := True;
-- Recursive call, using the detected parameter if any
if Last >= Param then
For_Each_Simple_Switch
(Cmd,
Prefix & Group (Idx .. Param - 1),
Group (Param .. Last));
else
For_Each_Simple_Switch
(Cmd, Prefix & Group (Idx .. Last), "");
end if;
Idx := Last + 1;
exit;
end if;
end if;
end;
end loop;
if not Found then
For_Each_Simple_Switch (Cmd, Prefix & Group (Idx), "");
Idx := Idx + 1;
end if;
end loop;
return True;
end Group_Analysis;
begin
-- First determine if the switch corresponds to one belonging to the
-- configuration. If so, run callback and exit.
if Cmd.Config /= null and then Cmd.Config.Switches /= null then
for S in Cmd.Config.Switches'Range loop
declare
Config_Switch : String renames Cmd.Config.Switches (S).all;
begin
if Actual_Switch (Config_Switch) = Switch
and then
((Can_Have_Parameter (Config_Switch)
and then Parameter /= "")
or else
(not Require_Parameter (Config_Switch)
and then Parameter = ""))
then
Callback (Switch, Parameter);
return;
end if;
end;
end loop;
end if;
-- If adding a switch that can in fact be expanded through aliases,
-- add separately each of its expansions.
-- This takes care of expansions like "-T" -> "-gnatwrs", where the
-- alias and its expansion do not have the same prefix. Given the order
-- in which we do things here, the expansion of the alias will itself
-- be checked for a common prefix and split into simple switches.
if Unalias
and then Cmd.Config /= null
and then Cmd.Config.Aliases /= null
then
for A in Cmd.Config.Aliases'Range loop
if Cmd.Config.Aliases (A).all = Switch and then Parameter = "" then
For_Each_Simple_Switch
(Cmd, Cmd.Config.Expansions (A).all, "");
return;
end if;
end loop;
end if;
-- If adding a switch grouping several switches, add each of the simple
-- switches instead.
if Cmd.Config /= null and then Cmd.Config.Prefixes /= null then
for P in Cmd.Config.Prefixes'Range loop
if Switch'Length > Cmd.Config.Prefixes (P)'Length + 1
and then Looking_At
(Switch, Switch'First, Cmd.Config.Prefixes (P).all)
then
-- Alias expansion will be done recursively
if Cmd.Config.Switches = null then
for S in Switch'First + Cmd.Config.Prefixes (P)'Length
.. Switch'Last
loop
For_Each_Simple_Switch
(Cmd, Cmd.Config.Prefixes (P).all & Switch (S), "");
end loop;
return;
elsif Group_Analysis
(Cmd.Config.Prefixes (P).all,
Switch
(Switch'First + Cmd.Config.Prefixes (P)'Length
.. Switch'Last))
then
-- Recursive calls already done on each switch of the group:
-- Return without executing Callback.
return;
end if;
end if;
end loop;
end if;
-- Test if added switch is a known switch with parameter attached
if Parameter = ""
and then Cmd.Config /= null
and then Cmd.Config.Switches /= null
then
for S in Cmd.Config.Switches'Range loop
declare
Sw : constant String :=
Actual_Switch (Cmd.Config.Switches (S).all);
Last : Natural;
Param : Natural;
begin
-- Verify that switch starts with Sw
-- What if the "verification" fails???
if Switch'Length >= Sw'Length
and then Looking_At (Switch, Switch'First, Sw)
then
Param := Switch'First + Sw'Length - 1;
Last := Param;
if Can_Have_Parameter (Cmd.Config.Switches (S).all) then
while Last < Switch'Last
and then Switch (Last + 1) in '0' .. '9'
loop
Last := Last + 1;
end loop;
end if;
-- If full Switch is a known switch with attached parameter
-- then we use this parameter in the callback.
if Last = Switch'Last then
Callback
(Switch (Switch'First .. Param),
Switch (Param + 1 .. Last));
return;
end if;
end if;
end;
end loop;
end if;
Callback (Switch, Parameter);
end For_Each_Simple_Switch;
----------------
-- Add_Switch --
----------------
procedure Add_Switch
(Cmd : in out Command_Line;
Switch : String;
Parameter : String := "";
Separator : Character := ' ';
Section : String := "";
Add_Before : Boolean := False)
is
Success : Boolean;
pragma Unreferenced (Success);
begin
Add_Switch
(Cmd, Switch, Parameter, Separator, Section, Add_Before, Success);
end Add_Switch;
----------------
-- Add_Switch --
----------------
procedure Add_Switch
(Cmd : in out Command_Line;
Switch : String;
Parameter : String := "";
Separator : Character := ' ';
Section : String := "";
Add_Before : Boolean := False;
Success : out Boolean)
is
procedure Add_Simple_Switch (Simple : String; Param : String);
-- Add a new switch that has had all its aliases expanded, and switches
-- ungrouped. We know there are no more aliases in Switches.
-----------------------
-- Add_Simple_Switch --
-----------------------
procedure Add_Simple_Switch (Simple : String; Param : String) is
begin
if Cmd.Expanded = null then
Cmd.Expanded := new Argument_List'(1 .. 1 => new String'(Simple));
if Param /= "" then
Cmd.Params := new Argument_List'
(1 .. 1 => new String'(Separator & Param));
else
Cmd.Params := new Argument_List'(1 .. 1 => null);
end if;
if Section = "" then
Cmd.Sections := new Argument_List'(1 .. 1 => null);
else
Cmd.Sections := new Argument_List'
(1 .. 1 => new String'(Section));
end if;
else
-- Do we already have this switch?
for C in Cmd.Expanded'Range loop
if Cmd.Expanded (C).all = Simple
and then
((Cmd.Params (C) = null and then Param = "")
or else
(Cmd.Params (C) /= null
and then Cmd.Params (C).all = Separator & Param))
and then
((Cmd.Sections (C) = null and then Section = "")
or else
(Cmd.Sections (C) /= null
and then Cmd.Sections (C).all = Section))
then
return;
end if;
end loop;
-- Inserting at least one switch
Success := True;
Add (Cmd.Expanded, new String'(Simple), Add_Before);
if Param /= "" then
Add
(Cmd.Params,
new String'(Separator & Param),
Add_Before);
else
Add
(Cmd.Params,
null,
Add_Before);
end if;
if Section = "" then
Add
(Cmd.Sections,
null,
Add_Before);
else
Add
(Cmd.Sections,
new String'(Section),
Add_Before);
end if;
end if;
end Add_Simple_Switch;
procedure Add_Simple_Switches is
new For_Each_Simple_Switch (Add_Simple_Switch);
-- Start of processing for Add_Switch
begin
Success := False;
Add_Simple_Switches (Cmd, Switch, Parameter);
Free (Cmd.Coalesce);
end Add_Switch;
------------
-- Remove --
------------
procedure Remove (Line : in out Argument_List_Access; Index : Integer) is
Tmp : Argument_List_Access := Line;
begin
Line := new Argument_List (Tmp'First .. Tmp'Last - 1);
if Index /= Tmp'First then
Line (Tmp'First .. Index - 1) := Tmp (Tmp'First .. Index - 1);
end if;
Free (Tmp (Index));
if Index /= Tmp'Last then
Line (Index .. Tmp'Last - 1) := Tmp (Index + 1 .. Tmp'Last);
end if;
Unchecked_Free (Tmp);
end Remove;
---------
-- Add --
---------
procedure Add
(Line : in out Argument_List_Access;
Str : String_Access;
Before : Boolean := False)
is
Tmp : Argument_List_Access := Line;
begin
if Tmp /= null then
Line := new Argument_List (Tmp'First .. Tmp'Last + 1);
if Before then
Line (Tmp'First) := Str;
Line (Tmp'First + 1 .. Tmp'Last + 1) := Tmp.all;
else
Line (Tmp'Range) := Tmp.all;
Line (Tmp'Last + 1) := Str;
end if;
Unchecked_Free (Tmp);
else
Line := new Argument_List'(1 .. 1 => Str);
end if;
end Add;
-------------------
-- Remove_Switch --
-------------------
procedure Remove_Switch
(Cmd : in out Command_Line;
Switch : String;
Remove_All : Boolean := False;
Has_Parameter : Boolean := False;
Section : String := "")
is
Success : Boolean;
pragma Unreferenced (Success);
begin
Remove_Switch (Cmd, Switch, Remove_All, Has_Parameter, Section, Success);
end Remove_Switch;
-------------------
-- Remove_Switch --
-------------------
procedure Remove_Switch
(Cmd : in out Command_Line;
Switch : String;
Remove_All : Boolean := False;
Has_Parameter : Boolean := False;
Section : String := "";
Success : out Boolean)
is
procedure Remove_Simple_Switch (Simple : String; Param : String);
-- Removes a simple switch, with no aliasing or grouping
--------------------------
-- Remove_Simple_Switch --
--------------------------
procedure Remove_Simple_Switch (Simple : String; Param : String) is
C : Integer;
pragma Unreferenced (Param);
begin
if Cmd.Expanded /= null then
C := Cmd.Expanded'First;
while C <= Cmd.Expanded'Last loop
if Cmd.Expanded (C).all = Simple
and then
(Remove_All
or else (Cmd.Sections (C) = null
and then Section = "")
or else (Cmd.Sections (C) /= null
and then Section = Cmd.Sections (C).all))
and then (not Has_Parameter or else Cmd.Params (C) /= null)
then
Remove (Cmd.Expanded, C);
Remove (Cmd.Params, C);
Remove (Cmd.Sections, C);
Success := True;
if not Remove_All then
return;
end if;
else
C := C + 1;
end if;
end loop;
end if;
end Remove_Simple_Switch;
procedure Remove_Simple_Switches is
new For_Each_Simple_Switch (Remove_Simple_Switch);
-- Start of processing for Remove_Switch
begin
Success := False;
Remove_Simple_Switches (Cmd, Switch, "", Unalias => not Has_Parameter);
Free (Cmd.Coalesce);
end Remove_Switch;
-------------------
-- Remove_Switch --
-------------------
procedure Remove_Switch
(Cmd : in out Command_Line;
Switch : String;
Parameter : String;
Section : String := "")
is
procedure Remove_Simple_Switch (Simple : String; Param : String);
-- Removes a simple switch, with no aliasing or grouping
--------------------------
-- Remove_Simple_Switch --
--------------------------
procedure Remove_Simple_Switch (Simple : String; Param : String) is
C : Integer;
begin
if Cmd.Expanded /= null then
C := Cmd.Expanded'First;
while C <= Cmd.Expanded'Last loop
if Cmd.Expanded (C).all = Simple
and then
((Cmd.Sections (C) = null
and then Section = "")
or else
(Cmd.Sections (C) /= null
and then Section = Cmd.Sections (C).all))
and then
((Cmd.Params (C) = null and then Param = "")
or else
(Cmd.Params (C) /= null
and then
-- Ignore the separator stored in Parameter
Cmd.Params (C) (Cmd.Params (C)'First + 1
.. Cmd.Params (C)'Last) =
Param))
then
Remove (Cmd.Expanded, C);
Remove (Cmd.Params, C);
Remove (Cmd.Sections, C);
-- The switch is necessarily unique by construction of
-- Add_Switch.
return;
else
C := C + 1;
end if;
end loop;
end if;
end Remove_Simple_Switch;
procedure Remove_Simple_Switches is
new For_Each_Simple_Switch (Remove_Simple_Switch);
-- Start of processing for Remove_Switch
begin
Remove_Simple_Switches (Cmd, Switch, Parameter);
Free (Cmd.Coalesce);
end Remove_Switch;
--------------------
-- Group_Switches --
--------------------
procedure Group_Switches
(Cmd : Command_Line;
Result : Argument_List_Access;
Sections : Argument_List_Access;
Params : Argument_List_Access)
is
function Compatible_Parameter (Param : String_Access) return Boolean;
-- True when the parameter can be part of a group
--------------------------
-- Compatible_Parameter --
--------------------------
function Compatible_Parameter (Param : String_Access) return Boolean is
begin
-- No parameter OK
if Param = null then
return True;
-- We need parameters without separators
elsif Param (Param'First) /= ASCII.NUL then
return False;
-- Parameters must be all digits
else
for J in Param'First + 1 .. Param'Last loop
if Param (J) not in '0' .. '9' then
return False;
end if;
end loop;
return True;
end if;
end Compatible_Parameter;
-- Local declarations
Group : Ada.Strings.Unbounded.Unbounded_String;
First : Natural;
use type Ada.Strings.Unbounded.Unbounded_String;
-- Start of processing for Group_Switches
begin
if Cmd.Config = null
or else Cmd.Config.Prefixes = null
then
return;
end if;
for P in Cmd.Config.Prefixes'Range loop
Group := Ada.Strings.Unbounded.Null_Unbounded_String;
First := 0;
for C in Result'Range loop
if Result (C) /= null
and then Compatible_Parameter (Params (C))
and then Looking_At
(Result (C).all, Result (C)'First, Cmd.Config.Prefixes (P).all)
then
-- If we are still in the same section, group the switches
if First = 0
or else
(Sections (C) = null
and then Sections (First) = null)
or else
(Sections (C) /= null
and then Sections (First) /= null
and then Sections (C).all = Sections (First).all)
then
Group :=
Group &
Result (C)
(Result (C)'First + Cmd.Config.Prefixes (P)'Length ..
Result (C)'Last);
if Params (C) /= null then
Group :=
Group &
Params (C) (Params (C)'First + 1 .. Params (C)'Last);
Free (Params (C));
end if;
if First = 0 then
First := C;
end if;
Free (Result (C));
else
-- We changed section: we put the grouped switches to the
-- first place, on continue with the new section.
Result (First) :=
new String'
(Cmd.Config.Prefixes (P).all &
Ada.Strings.Unbounded.To_String (Group));
Group :=
Ada.Strings.Unbounded.To_Unbounded_String
(Result (C)
(Result (C)'First + Cmd.Config.Prefixes (P)'Length ..
Result (C)'Last));
First := C;
end if;
end if;
end loop;
if First > 0 then
Result (First) :=
new String'
(Cmd.Config.Prefixes (P).all &
Ada.Strings.Unbounded.To_String (Group));
end if;
end loop;
end Group_Switches;
--------------------
-- Alias_Switches --
--------------------
procedure Alias_Switches
(Cmd : Command_Line;
Result : Argument_List_Access;
Params : Argument_List_Access)
is
Found : Boolean;
First : Natural;
procedure Check_Cb (Switch : String; Param : String);
-- Comment required ???
procedure Remove_Cb (Switch : String; Param : String);
-- Comment required ???
--------------
-- Check_Cb --
--------------
procedure Check_Cb (Switch : String; Param : String) is
begin
if Found then
for E in Result'Range loop
if Result (E) /= null
and then
(Params (E) = null
or else Params (E) (Params (E)'First + 1
.. Params (E)'Last) = Param)
and then Result (E).all = Switch
then
return;
end if;
end loop;
Found := False;
end if;
end Check_Cb;
---------------
-- Remove_Cb --
---------------
procedure Remove_Cb (Switch : String; Param : String) is
begin
for E in Result'Range loop
if Result (E) /= null
and then
(Params (E) = null
or else Params (E) (Params (E)'First + 1
.. Params (E)'Last) = Param)
and then Result (E).all = Switch
then
if First > E then
First := E;
end if;
Free (Result (E));
Free (Params (E));
return;
end if;
end loop;
end Remove_Cb;
procedure Check_All is new For_Each_Simple_Switch (Check_Cb);
procedure Remove_All is new For_Each_Simple_Switch (Remove_Cb);
-- Start of processing for Alias_Switches
begin
if Cmd.Config = null
or else Cmd.Config.Aliases = null
then
return;
end if;
for A in Cmd.Config.Aliases'Range loop
-- Compute the various simple switches that make up the alias. We
-- split the expansion into as many simple switches as possible, and
-- then check whether the expanded command line has all of them.
Found := True;
Check_All (Cmd, Cmd.Config.Expansions (A).all);
if Found then
First := Integer'Last;
Remove_All (Cmd, Cmd.Config.Expansions (A).all);
Result (First) := new String'(Cmd.Config.Aliases (A).all);
end if;
end loop;
end Alias_Switches;
-------------------
-- Sort_Sections --
-------------------
procedure Sort_Sections
(Line : GNAT.OS_Lib.Argument_List_Access;
Sections : GNAT.OS_Lib.Argument_List_Access;
Params : GNAT.OS_Lib.Argument_List_Access)
is
Sections_List : Argument_List_Access :=
new Argument_List'(1 .. 1 => null);
Found : Boolean;
Old_Line : constant Argument_List := Line.all;
Old_Sections : constant Argument_List := Sections.all;
Old_Params : constant Argument_List := Params.all;
Index : Natural;
begin
if Line = null then
return;
end if;
-- First construct a list of all sections
for E in Line'Range loop
if Sections (E) /= null then
Found := False;
for S in Sections_List'Range loop
if (Sections_List (S) = null and then Sections (E) = null)
or else
(Sections_List (S) /= null
and then Sections (E) /= null
and then Sections_List (S).all = Sections (E).all)
then
Found := True;
exit;
end if;
end loop;
if not Found then
Add (Sections_List, Sections (E));
end if;
end if;
end loop;
Index := Line'First;
for S in Sections_List'Range loop
for E in Old_Line'Range loop
if (Sections_List (S) = null and then Old_Sections (E) = null)
or else
(Sections_List (S) /= null
and then Old_Sections (E) /= null
and then Sections_List (S).all = Old_Sections (E).all)
then
Line (Index) := Old_Line (E);
Sections (Index) := Old_Sections (E);
Params (Index) := Old_Params (E);
Index := Index + 1;
end if;
end loop;
end loop;
end Sort_Sections;
-----------
-- Start --
-----------
procedure Start
(Cmd : in out Command_Line;
Iter : in out Command_Line_Iterator;
Expanded : Boolean)
is
begin
if Cmd.Expanded = null then
Iter.List := null;
return;
end if;
-- Reorder the expanded line so that sections are grouped
Sort_Sections (Cmd.Expanded, Cmd.Sections, Cmd.Params);
-- Coalesce the switches as much as possible
if not Expanded
and then Cmd.Coalesce = null
then
Cmd.Coalesce := new Argument_List (Cmd.Expanded'Range);
for E in Cmd.Expanded'Range loop
Cmd.Coalesce (E) := new String'(Cmd.Expanded (E).all);
end loop;
Cmd.Coalesce_Sections := new Argument_List (Cmd.Sections'Range);
for E in Cmd.Sections'Range loop
if Cmd.Sections (E) = null then
Cmd.Coalesce_Sections (E) := null;
else
Cmd.Coalesce_Sections (E) := new String'(Cmd.Sections (E).all);
end if;
end loop;
Cmd.Coalesce_Params := new Argument_List (Cmd.Params'Range);
for E in Cmd.Params'Range loop
if Cmd.Params (E) = null then
Cmd.Coalesce_Params (E) := null;
else
Cmd.Coalesce_Params (E) := new String'(Cmd.Params (E).all);
end if;
end loop;
-- Not a clone, since we will not modify the parameters anyway
Alias_Switches (Cmd, Cmd.Coalesce, Cmd.Coalesce_Params);
Group_Switches
(Cmd, Cmd.Coalesce, Cmd.Coalesce_Sections, Cmd.Coalesce_Params);
end if;
if Expanded then
Iter.List := Cmd.Expanded;
Iter.Params := Cmd.Params;
Iter.Sections := Cmd.Sections;
else
Iter.List := Cmd.Coalesce;
Iter.Params := Cmd.Coalesce_Params;
Iter.Sections := Cmd.Coalesce_Sections;
end if;
if Iter.List = null then
Iter.Current := Integer'Last;
else
Iter.Current := Iter.List'First;
while Iter.Current <= Iter.List'Last
and then Iter.List (Iter.Current) = null
loop
Iter.Current := Iter.Current + 1;
end loop;
end if;
end Start;
--------------------
-- Current_Switch --
--------------------
function Current_Switch (Iter : Command_Line_Iterator) return String is
begin
return Iter.List (Iter.Current).all;
end Current_Switch;
--------------------
-- Is_New_Section --
--------------------
function Is_New_Section (Iter : Command_Line_Iterator) return Boolean is
Section : constant String := Current_Section (Iter);
begin
if Iter.Sections = null then
return False;
elsif Iter.Current = Iter.Sections'First
or else Iter.Sections (Iter.Current - 1) = null
then
return Section /= "";
end if;
return Section /= Iter.Sections (Iter.Current - 1).all;
end Is_New_Section;
---------------------
-- Current_Section --
---------------------
function Current_Section (Iter : Command_Line_Iterator) return String is
begin
if Iter.Sections = null
or else Iter.Current > Iter.Sections'Last
or else Iter.Sections (Iter.Current) = null
then
return "";
end if;
return Iter.Sections (Iter.Current).all;
end Current_Section;
-----------------------
-- Current_Separator --
-----------------------
function Current_Separator (Iter : Command_Line_Iterator) return String is
begin
if Iter.Params = null
or else Iter.Current > Iter.Params'Last
or else Iter.Params (Iter.Current) = null
then
return "";
else
declare
Sep : constant Character :=
Iter.Params (Iter.Current) (Iter.Params (Iter.Current)'First);
begin
if Sep = ASCII.NUL then
return "";
else
return "" & Sep;
end if;
end;
end if;
end Current_Separator;
-----------------------
-- Current_Parameter --
-----------------------
function Current_Parameter (Iter : Command_Line_Iterator) return String is
begin
if Iter.Params = null
or else Iter.Current > Iter.Params'Last
or else Iter.Params (Iter.Current) = null
then
return "";
else
declare
P : constant String := Iter.Params (Iter.Current).all;
begin
-- Skip separator
return P (P'First + 1 .. P'Last);
end;
end if;
end Current_Parameter;
--------------
-- Has_More --
--------------
function Has_More (Iter : Command_Line_Iterator) return Boolean is
begin
return Iter.List /= null and then Iter.Current <= Iter.List'Last;
end Has_More;
----------
-- Next --
----------
procedure Next (Iter : in out Command_Line_Iterator) is
begin
Iter.Current := Iter.Current + 1;
while Iter.Current <= Iter.List'Last
and then Iter.List (Iter.Current) = null
loop
Iter.Current := Iter.Current + 1;
end loop;
end Next;
----------
-- Free --
----------
procedure Free (Config : in out Command_Line_Configuration) is
begin
if Config /= null then
Free (Config.Aliases);
Free (Config.Expansions);
Free (Config.Prefixes);
Free (Config.Sections);
Free (Config.Switches);
Unchecked_Free (Config);
end if;
end Free;
----------
-- Free --
----------
procedure Free (Cmd : in out Command_Line) is
begin
Free (Cmd.Expanded);
Free (Cmd.Coalesce);
Free (Cmd.Params);
end Free;
end GNAT.Command_Line;