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Diffstat (limited to 'gcc-4.4.3/gcc/ada/g-comlin.adb')
| -rw-r--r-- | gcc-4.4.3/gcc/ada/g-comlin.adb | 2442 |
1 files changed, 2442 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/ada/g-comlin.adb b/gcc-4.4.3/gcc/ada/g-comlin.adb new file mode 100644 index 000000000..ebefea4b6 --- /dev/null +++ b/gcc-4.4.3/gcc/ada/g-comlin.adb @@ -0,0 +1,2442 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- 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 matches at least + -- partially Arg. Index_In_Switches is set to 0 if none matches + + 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; + + -- If not a directory, check the relative path against the pattern + + else + 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 if; + 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 + <<Restart>> + + -- 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 <switch>=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 <switch> 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; + + -- 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), ""); + 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 + -- Are we adding a switch that can in fact be expanded through aliases ? + -- If yes, we add separately each of its expansion. + + -- 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 further 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; + + -- Are we adding a switch grouping several switches ? If yes, 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. Let's return to not call 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); + 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; |