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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G N A T . A W K -- -- -- -- B o d y -- -- -- -- Copyright (C) 2000-2010, AdaCore -- -- -- -- 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 2, 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. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ pragma Ada_95; -- This is needed because the pragmas Warnings (Off) in Current_Session and -- Default_Session (see below) do not work when compiling clients of this -- package that instantiate generic units herein. with Ada.Exceptions; with Ada.Text_IO; with Ada.Strings.Unbounded; with Ada.Strings.Fixed; with Ada.Strings.Maps; with Ada.Unchecked_Deallocation; with GNAT.Directory_Operations; with GNAT.Dynamic_Tables; with GNAT.OS_Lib; package body GNAT.AWK is use Ada; use Ada.Strings.Unbounded; ----------------------- -- Local subprograms -- ----------------------- -- The following two subprograms provide a functional interface to the -- two special session variables, that are manipulated explicitly by -- Finalize, but must be declared after Finalize to prevent static -- elaboration warnings. function Get_Def return Session_Data_Access; procedure Set_Cur; ---------------- -- Split mode -- ---------------- package Split is type Mode is abstract tagged null record; -- This is the main type which is declared abstract. This type must be -- derived for each split style. type Mode_Access is access Mode'Class; procedure Current_Line (S : Mode; Session : Session_Type) is abstract; -- Split current line of Session using split mode S ------------------------ -- Split on separator -- ------------------------ type Separator (Size : Positive) is new Mode with record Separators : String (1 .. Size); end record; procedure Current_Line (S : Separator; Session : Session_Type); --------------------- -- Split on column -- --------------------- type Column (Size : Positive) is new Mode with record Columns : Widths_Set (1 .. Size); end record; procedure Current_Line (S : Column; Session : Session_Type); end Split; procedure Free is new Unchecked_Deallocation (Split.Mode'Class, Split.Mode_Access); ---------------- -- File_Table -- ---------------- type AWK_File is access String; package File_Table is new Dynamic_Tables (AWK_File, Natural, 1, 5, 50); -- List of file names associated with a Session procedure Free is new Unchecked_Deallocation (String, AWK_File); ----------------- -- Field_Table -- ----------------- type Field_Slice is record First : Positive; Last : Natural; end record; -- This is a field slice (First .. Last) in session's current line package Field_Table is new Dynamic_Tables (Field_Slice, Natural, 1, 10, 100); -- List of fields for the current line -------------- -- Patterns -- -------------- -- Define all patterns style: exact string, regular expression, boolean -- function. package Patterns is type Pattern is abstract tagged null record; -- This is the main type which is declared abstract. This type must be -- derived for each patterns style. type Pattern_Access is access Pattern'Class; function Match (P : Pattern; Session : Session_Type) return Boolean is abstract; -- Returns True if P match for the current session and False otherwise procedure Release (P : in out Pattern); -- Release memory used by the pattern structure -------------------------- -- Exact string pattern -- -------------------------- type String_Pattern is new Pattern with record Str : Unbounded_String; Rank : Count; end record; function Match (P : String_Pattern; Session : Session_Type) return Boolean; -------------------------------- -- Regular expression pattern -- -------------------------------- type Pattern_Matcher_Access is access Regpat.Pattern_Matcher; type Regexp_Pattern is new Pattern with record Regx : Pattern_Matcher_Access; Rank : Count; end record; function Match (P : Regexp_Pattern; Session : Session_Type) return Boolean; procedure Release (P : in out Regexp_Pattern); ------------------------------ -- Boolean function pattern -- ------------------------------ type Callback_Pattern is new Pattern with record Pattern : Pattern_Callback; end record; function Match (P : Callback_Pattern; Session : Session_Type) return Boolean; end Patterns; procedure Free is new Unchecked_Deallocation (Patterns.Pattern'Class, Patterns.Pattern_Access); ------------- -- Actions -- ------------- -- Define all action style : simple call, call with matches package Actions is type Action is abstract tagged null record; -- This is the main type which is declared abstract. This type must be -- derived for each action style. type Action_Access is access Action'Class; procedure Call (A : Action; Session : Session_Type) is abstract; -- Call action A as required ------------------- -- Simple action -- ------------------- type Simple_Action is new Action with record Proc : Action_Callback; end record; procedure Call (A : Simple_Action; Session : Session_Type); ------------------------- -- Action with matches -- ------------------------- type Match_Action is new Action with record Proc : Match_Action_Callback; end record; procedure Call (A : Match_Action; Session : Session_Type); end Actions; procedure Free is new Unchecked_Deallocation (Actions.Action'Class, Actions.Action_Access); -------------------------- -- Pattern/Action table -- -------------------------- type Pattern_Action is record Pattern : Patterns.Pattern_Access; -- If Pattern is True Action : Actions.Action_Access; -- Action will be called end record; package Pattern_Action_Table is new Dynamic_Tables (Pattern_Action, Natural, 1, 5, 50); ------------------ -- Session Data -- ------------------ type Session_Data is record Current_File : Text_IO.File_Type; Current_Line : Unbounded_String; Separators : Split.Mode_Access; Files : File_Table.Instance; File_Index : Natural := 0; Fields : Field_Table.Instance; Filters : Pattern_Action_Table.Instance; NR : Natural := 0; FNR : Natural := 0; Matches : Regpat.Match_Array (0 .. 100); -- Latest matches for the regexp pattern end record; procedure Free is new Unchecked_Deallocation (Session_Data, Session_Data_Access); -------------- -- Finalize -- -------------- procedure Finalize (Session : in out Session_Type) is begin -- We release the session data only if it is not the default session if Session.Data /= Get_Def then -- Release separators Free (Session.Data.Separators); Free (Session.Data); -- Since we have closed the current session, set it to point now to -- the default session. Set_Cur; end if; end Finalize; ---------------- -- Initialize -- ---------------- procedure Initialize (Session : in out Session_Type) is begin Session.Data := new Session_Data; -- Initialize separators Session.Data.Separators := new Split.Separator'(Default_Separators'Length, Default_Separators); -- Initialize all tables File_Table.Init (Session.Data.Files); Field_Table.Init (Session.Data.Fields); Pattern_Action_Table.Init (Session.Data.Filters); end Initialize; ----------------------- -- Session Variables -- ----------------------- Def_Session : Session_Type; Cur_Session : Session_Type; ---------------------- -- Private Services -- ---------------------- function Always_True return Boolean; -- A function that always returns True function Apply_Filters (Session : Session_Type) return Boolean; -- Apply any filters for which the Pattern is True for Session. It returns -- True if a least one filters has been applied (i.e. associated action -- callback has been called). procedure Open_Next_File (Session : Session_Type); pragma Inline (Open_Next_File); -- Open next file for Session closing current file if needed. It raises -- End_Error if there is no more file in the table. procedure Raise_With_Info (E : Exceptions.Exception_Id; Message : String; Session : Session_Type); pragma No_Return (Raise_With_Info); -- Raises exception E with the message prepended with the current line -- number and the filename if possible. procedure Read_Line (Session : Session_Type); -- Read a line for the Session and set Current_Line procedure Split_Line (Session : Session_Type); -- Split session's Current_Line according to the session separators and -- set the Fields table. This procedure can be called at any time. ---------------------- -- Private Packages -- ---------------------- ------------- -- Actions -- ------------- package body Actions is ---------- -- Call -- ---------- procedure Call (A : Simple_Action; Session : Session_Type) is pragma Unreferenced (Session); begin A.Proc.all; end Call; ---------- -- Call -- ---------- procedure Call (A : Match_Action; Session : Session_Type) is begin A.Proc (Session.Data.Matches); end Call; end Actions; -------------- -- Patterns -- -------------- package body Patterns is ----------- -- Match -- ----------- function Match (P : String_Pattern; Session : Session_Type) return Boolean is begin return P.Str = Field (P.Rank, Session); end Match; ----------- -- Match -- ----------- function Match (P : Regexp_Pattern; Session : Session_Type) return Boolean is use type Regpat.Match_Location; begin Regpat.Match (P.Regx.all, Field (P.Rank, Session), Session.Data.Matches); return Session.Data.Matches (0) /= Regpat.No_Match; end Match; ----------- -- Match -- ----------- function Match (P : Callback_Pattern; Session : Session_Type) return Boolean is pragma Unreferenced (Session); begin return P.Pattern.all; end Match; ------------- -- Release -- ------------- procedure Release (P : in out Pattern) is pragma Unreferenced (P); begin null; end Release; ------------- -- Release -- ------------- procedure Release (P : in out Regexp_Pattern) is procedure Free is new Unchecked_Deallocation (Regpat.Pattern_Matcher, Pattern_Matcher_Access); begin Free (P.Regx); end Release; end Patterns; ----------- -- Split -- ----------- package body Split is use Ada.Strings; ------------------ -- Current_Line -- ------------------ procedure Current_Line (S : Separator; Session : Session_Type) is Line : constant String := To_String (Session.Data.Current_Line); Fields : Field_Table.Instance renames Session.Data.Fields; Seps : constant Maps.Character_Set := Maps.To_Set (S.Separators); Start : Natural; Stop : Natural; begin -- First field start here Start := Line'First; -- Record the first field start position which is the first character -- in the line. Field_Table.Increment_Last (Fields); Fields.Table (Field_Table.Last (Fields)).First := Start; loop -- Look for next separator Stop := Fixed.Index (Source => Line (Start .. Line'Last), Set => Seps); exit when Stop = 0; Fields.Table (Field_Table.Last (Fields)).Last := Stop - 1; -- If separators are set to the default (space and tab) we skip -- all spaces and tabs following current field. if S.Separators = Default_Separators then Start := Fixed.Index (Line (Stop + 1 .. Line'Last), Maps.To_Set (Default_Separators), Outside, Strings.Forward); if Start = 0 then Start := Stop + 1; end if; else Start := Stop + 1; end if; -- Record in the field table the start of this new field Field_Table.Increment_Last (Fields); Fields.Table (Field_Table.Last (Fields)).First := Start; end loop; Fields.Table (Field_Table.Last (Fields)).Last := Line'Last; end Current_Line; ------------------ -- Current_Line -- ------------------ procedure Current_Line (S : Column; Session : Session_Type) is Line : constant String := To_String (Session.Data.Current_Line); Fields : Field_Table.Instance renames Session.Data.Fields; Start : Positive := Line'First; begin -- Record the first field start position which is the first character -- in the line. for C in 1 .. S.Columns'Length loop Field_Table.Increment_Last (Fields); Fields.Table (Field_Table.Last (Fields)).First := Start; Start := Start + S.Columns (C); Fields.Table (Field_Table.Last (Fields)).Last := Start - 1; end loop; -- If there is some remaining character on the line, add them in a -- new field. if Start - 1 < Line'Length then Field_Table.Increment_Last (Fields); Fields.Table (Field_Table.Last (Fields)).First := Start; Fields.Table (Field_Table.Last (Fields)).Last := Line'Last; end if; end Current_Line; end Split; -------------- -- Add_File -- -------------- procedure Add_File (Filename : String; Session : Session_Type) is Files : File_Table.Instance renames Session.Data.Files; begin if OS_Lib.Is_Regular_File (Filename) then File_Table.Increment_Last (Files); Files.Table (File_Table.Last (Files)) := new String'(Filename); else Raise_With_Info (File_Error'Identity, "File " & Filename & " not found.", Session); end if; end Add_File; procedure Add_File (Filename : String) is begin Add_File (Filename, Cur_Session); end Add_File; --------------- -- Add_Files -- --------------- procedure Add_Files (Directory : String; Filenames : String; Number_Of_Files_Added : out Natural; Session : Session_Type) is use Directory_Operations; Dir : Dir_Type; Filename : String (1 .. 200); Last : Natural; begin Number_Of_Files_Added := 0; Open (Dir, Directory); loop Read (Dir, Filename, Last); exit when Last = 0; Add_File (Filename (1 .. Last), Session); Number_Of_Files_Added := Number_Of_Files_Added + 1; end loop; Close (Dir); exception when others => Raise_With_Info (File_Error'Identity, "Error scanning directory " & Directory & " for files " & Filenames & '.', Session); end Add_Files; procedure Add_Files (Directory : String; Filenames : String; Number_Of_Files_Added : out Natural) is begin Add_Files (Directory, Filenames, Number_Of_Files_Added, Cur_Session); end Add_Files; ----------------- -- Always_True -- ----------------- function Always_True return Boolean is begin return True; end Always_True; ------------------- -- Apply_Filters -- ------------------- function Apply_Filters (Session : Session_Type) return Boolean is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; Results : Boolean := False; begin -- Iterate through the filters table, if pattern match call action for F in 1 .. Pattern_Action_Table.Last (Filters) loop if Patterns.Match (Filters.Table (F).Pattern.all, Session) then Results := True; Actions.Call (Filters.Table (F).Action.all, Session); end if; end loop; return Results; end Apply_Filters; ----------- -- Close -- ----------- procedure Close (Session : Session_Type) is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; Files : File_Table.Instance renames Session.Data.Files; begin -- Close current file if needed if Text_IO.Is_Open (Session.Data.Current_File) then Text_IO.Close (Session.Data.Current_File); end if; -- Release Filters table for F in 1 .. Pattern_Action_Table.Last (Filters) loop Patterns.Release (Filters.Table (F).Pattern.all); Free (Filters.Table (F).Pattern); Free (Filters.Table (F).Action); end loop; for F in 1 .. File_Table.Last (Files) loop Free (Files.Table (F)); end loop; File_Table.Set_Last (Session.Data.Files, 0); Field_Table.Set_Last (Session.Data.Fields, 0); Pattern_Action_Table.Set_Last (Session.Data.Filters, 0); Session.Data.NR := 0; Session.Data.FNR := 0; Session.Data.File_Index := 0; Session.Data.Current_Line := Null_Unbounded_String; end Close; --------------------- -- Current_Session -- --------------------- function Current_Session return Session_Type is begin pragma Warnings (Off); return Cur_Session; -- ???The above return statement violates the Ada 2005 rule forbidding -- copying of limited objects (see RM-7.5(2.8/2)). When compiled with -- -gnatg, the compiler gives a warning instead of an error, so we can -- turn it off. pragma Warnings (On); end Current_Session; --------------------- -- Default_Session -- --------------------- function Default_Session return Session_Type is begin pragma Warnings (Off); return Def_Session; -- ???The above return statement violates the Ada 2005 rule forbidding -- copying of limited objects (see RM-7.5(2.8/2)). When compiled with -- -gnatg, the compiler gives a warning instead of an error, so we can -- turn it off. pragma Warnings (On); end Default_Session; -------------------- -- Discrete_Field -- -------------------- function Discrete_Field (Rank : Count; Session : Session_Type) return Discrete is begin return Discrete'Value (Field (Rank, Session)); end Discrete_Field; function Discrete_Field_Current_Session (Rank : Count) return Discrete is function Do_It is new Discrete_Field (Discrete); begin return Do_It (Rank, Cur_Session); end Discrete_Field_Current_Session; ----------------- -- End_Of_Data -- ----------------- function End_Of_Data (Session : Session_Type) return Boolean is begin return Session.Data.File_Index = File_Table.Last (Session.Data.Files) and then End_Of_File (Session); end End_Of_Data; function End_Of_Data return Boolean is begin return End_Of_Data (Cur_Session); end End_Of_Data; ----------------- -- End_Of_File -- ----------------- function End_Of_File (Session : Session_Type) return Boolean is begin return Text_IO.End_Of_File (Session.Data.Current_File); end End_Of_File; function End_Of_File return Boolean is begin return End_Of_File (Cur_Session); end End_Of_File; ----------- -- Field -- ----------- function Field (Rank : Count; Session : Session_Type) return String is Fields : Field_Table.Instance renames Session.Data.Fields; begin if Rank > Number_Of_Fields (Session) then Raise_With_Info (Field_Error'Identity, "Field number" & Count'Image (Rank) & " does not exist.", Session); elsif Rank = 0 then -- Returns the whole line, this is what $0 does under Session_Type return To_String (Session.Data.Current_Line); else return Slice (Session.Data.Current_Line, Fields.Table (Positive (Rank)).First, Fields.Table (Positive (Rank)).Last); end if; end Field; function Field (Rank : Count) return String is begin return Field (Rank, Cur_Session); end Field; function Field (Rank : Count; Session : Session_Type) return Integer is begin return Integer'Value (Field (Rank, Session)); exception when Constraint_Error => Raise_With_Info (Field_Error'Identity, "Field number" & Count'Image (Rank) & " cannot be converted to an integer.", Session); end Field; function Field (Rank : Count) return Integer is begin return Field (Rank, Cur_Session); end Field; function Field (Rank : Count; Session : Session_Type) return Float is begin return Float'Value (Field (Rank, Session)); exception when Constraint_Error => Raise_With_Info (Field_Error'Identity, "Field number" & Count'Image (Rank) & " cannot be converted to a float.", Session); end Field; function Field (Rank : Count) return Float is begin return Field (Rank, Cur_Session); end Field; ---------- -- File -- ---------- function File (Session : Session_Type) return String is Files : File_Table.Instance renames Session.Data.Files; begin if Session.Data.File_Index = 0 then return "??"; else return Files.Table (Session.Data.File_Index).all; end if; end File; function File return String is begin return File (Cur_Session); end File; -------------------- -- For_Every_Line -- -------------------- procedure For_Every_Line (Separators : String := Use_Current; Filename : String := Use_Current; Callbacks : Callback_Mode := None; Session : Session_Type) is Quit : Boolean; begin Open (Separators, Filename, Session); while not End_Of_Data (Session) loop Read_Line (Session); Split_Line (Session); if Callbacks in Only .. Pass_Through then declare Discard : Boolean; pragma Unreferenced (Discard); begin Discard := Apply_Filters (Session); end; end if; if Callbacks /= Only then Quit := False; Action (Quit); exit when Quit; end if; end loop; Close (Session); end For_Every_Line; procedure For_Every_Line_Current_Session (Separators : String := Use_Current; Filename : String := Use_Current; Callbacks : Callback_Mode := None) is procedure Do_It is new For_Every_Line (Action); begin Do_It (Separators, Filename, Callbacks, Cur_Session); end For_Every_Line_Current_Session; -------------- -- Get_Line -- -------------- procedure Get_Line (Callbacks : Callback_Mode := None; Session : Session_Type) is Filter_Active : Boolean; begin if not Text_IO.Is_Open (Session.Data.Current_File) then raise File_Error; end if; loop Read_Line (Session); Split_Line (Session); case Callbacks is when None => exit; when Only => Filter_Active := Apply_Filters (Session); exit when not Filter_Active; when Pass_Through => Filter_Active := Apply_Filters (Session); exit; end case; end loop; end Get_Line; procedure Get_Line (Callbacks : Callback_Mode := None) is begin Get_Line (Callbacks, Cur_Session); end Get_Line; ---------------------- -- Number_Of_Fields -- ---------------------- function Number_Of_Fields (Session : Session_Type) return Count is begin return Count (Field_Table.Last (Session.Data.Fields)); end Number_Of_Fields; function Number_Of_Fields return Count is begin return Number_Of_Fields (Cur_Session); end Number_Of_Fields; -------------------------- -- Number_Of_File_Lines -- -------------------------- function Number_Of_File_Lines (Session : Session_Type) return Count is begin return Count (Session.Data.FNR); end Number_Of_File_Lines; function Number_Of_File_Lines return Count is begin return Number_Of_File_Lines (Cur_Session); end Number_Of_File_Lines; --------------------- -- Number_Of_Files -- --------------------- function Number_Of_Files (Session : Session_Type) return Natural is Files : File_Table.Instance renames Session.Data.Files; begin return File_Table.Last (Files); end Number_Of_Files; function Number_Of_Files return Natural is begin return Number_Of_Files (Cur_Session); end Number_Of_Files; --------------------- -- Number_Of_Lines -- --------------------- function Number_Of_Lines (Session : Session_Type) return Count is begin return Count (Session.Data.NR); end Number_Of_Lines; function Number_Of_Lines return Count is begin return Number_Of_Lines (Cur_Session); end Number_Of_Lines; ---------- -- Open -- ---------- procedure Open (Separators : String := Use_Current; Filename : String := Use_Current; Session : Session_Type) is begin if Text_IO.Is_Open (Session.Data.Current_File) then raise Session_Error; end if; if Filename /= Use_Current then File_Table.Init (Session.Data.Files); Add_File (Filename, Session); end if; if Separators /= Use_Current then Set_Field_Separators (Separators, Session); end if; Open_Next_File (Session); exception when End_Error => raise File_Error; end Open; procedure Open (Separators : String := Use_Current; Filename : String := Use_Current) is begin Open (Separators, Filename, Cur_Session); end Open; -------------------- -- Open_Next_File -- -------------------- procedure Open_Next_File (Session : Session_Type) is Files : File_Table.Instance renames Session.Data.Files; begin if Text_IO.Is_Open (Session.Data.Current_File) then Text_IO.Close (Session.Data.Current_File); end if; Session.Data.File_Index := Session.Data.File_Index + 1; -- If there are no mores file in the table, raise End_Error if Session.Data.File_Index > File_Table.Last (Files) then raise End_Error; end if; Text_IO.Open (File => Session.Data.Current_File, Name => Files.Table (Session.Data.File_Index).all, Mode => Text_IO.In_File); end Open_Next_File; ----------- -- Parse -- ----------- procedure Parse (Separators : String := Use_Current; Filename : String := Use_Current; Session : Session_Type) is Filter_Active : Boolean; pragma Unreferenced (Filter_Active); begin Open (Separators, Filename, Session); while not End_Of_Data (Session) loop Get_Line (None, Session); Filter_Active := Apply_Filters (Session); end loop; Close (Session); end Parse; procedure Parse (Separators : String := Use_Current; Filename : String := Use_Current) is begin Parse (Separators, Filename, Cur_Session); end Parse; --------------------- -- Raise_With_Info -- --------------------- procedure Raise_With_Info (E : Exceptions.Exception_Id; Message : String; Session : Session_Type) is function Filename return String; -- Returns current filename and "??" if this information is not -- available. function Line return String; -- Returns current line number without the leading space -------------- -- Filename -- -------------- function Filename return String is File : constant String := AWK.File (Session); begin if File = "" then return "??"; else return File; end if; end Filename; ---------- -- Line -- ---------- function Line return String is L : constant String := Natural'Image (Session.Data.FNR); begin return L (2 .. L'Last); end Line; -- Start of processing for Raise_With_Info begin Exceptions.Raise_Exception (E, '[' & Filename & ':' & Line & "] " & Message); raise Constraint_Error; -- to please GNAT as this is a No_Return proc end Raise_With_Info; --------------- -- Read_Line -- --------------- procedure Read_Line (Session : Session_Type) is function Read_Line return String; -- Read a line in the current file. This implementation is recursive -- and does not have a limitation on the line length. NR : Natural renames Session.Data.NR; FNR : Natural renames Session.Data.FNR; --------------- -- Read_Line -- --------------- function Read_Line return String is Buffer : String (1 .. 1_024); Last : Natural; begin Text_IO.Get_Line (Session.Data.Current_File, Buffer, Last); if Last = Buffer'Last then return Buffer & Read_Line; else return Buffer (1 .. Last); end if; end Read_Line; -- Start of processing for Read_Line begin if End_Of_File (Session) then Open_Next_File (Session); FNR := 0; end if; Session.Data.Current_Line := To_Unbounded_String (Read_Line); NR := NR + 1; FNR := FNR + 1; end Read_Line; -------------- -- Register -- -------------- procedure Register (Field : Count; Pattern : String; Action : Action_Callback; Session : Session_Type) is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; U_Pattern : constant Unbounded_String := To_Unbounded_String (Pattern); begin Pattern_Action_Table.Increment_Last (Filters); Filters.Table (Pattern_Action_Table.Last (Filters)) := (Pattern => new Patterns.String_Pattern'(U_Pattern, Field), Action => new Actions.Simple_Action'(Proc => Action)); end Register; procedure Register (Field : Count; Pattern : String; Action : Action_Callback) is begin Register (Field, Pattern, Action, Cur_Session); end Register; procedure Register (Field : Count; Pattern : GNAT.Regpat.Pattern_Matcher; Action : Action_Callback; Session : Session_Type) is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; A_Pattern : constant Patterns.Pattern_Matcher_Access := new Regpat.Pattern_Matcher'(Pattern); begin Pattern_Action_Table.Increment_Last (Filters); Filters.Table (Pattern_Action_Table.Last (Filters)) := (Pattern => new Patterns.Regexp_Pattern'(A_Pattern, Field), Action => new Actions.Simple_Action'(Proc => Action)); end Register; procedure Register (Field : Count; Pattern : GNAT.Regpat.Pattern_Matcher; Action : Action_Callback) is begin Register (Field, Pattern, Action, Cur_Session); end Register; procedure Register (Field : Count; Pattern : GNAT.Regpat.Pattern_Matcher; Action : Match_Action_Callback; Session : Session_Type) is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; A_Pattern : constant Patterns.Pattern_Matcher_Access := new Regpat.Pattern_Matcher'(Pattern); begin Pattern_Action_Table.Increment_Last (Filters); Filters.Table (Pattern_Action_Table.Last (Filters)) := (Pattern => new Patterns.Regexp_Pattern'(A_Pattern, Field), Action => new Actions.Match_Action'(Proc => Action)); end Register; procedure Register (Field : Count; Pattern : GNAT.Regpat.Pattern_Matcher; Action : Match_Action_Callback) is begin Register (Field, Pattern, Action, Cur_Session); end Register; procedure Register (Pattern : Pattern_Callback; Action : Action_Callback; Session : Session_Type) is Filters : Pattern_Action_Table.Instance renames Session.Data.Filters; begin Pattern_Action_Table.Increment_Last (Filters); Filters.Table (Pattern_Action_Table.Last (Filters)) := (Pattern => new Patterns.Callback_Pattern'(Pattern => Pattern), Action => new Actions.Simple_Action'(Proc => Action)); end Register; procedure Register (Pattern : Pattern_Callback; Action : Action_Callback) is begin Register (Pattern, Action, Cur_Session); end Register; procedure Register (Action : Action_Callback; Session : Session_Type) is begin Register (Always_True'Access, Action, Session); end Register; procedure Register (Action : Action_Callback) is begin Register (Action, Cur_Session); end Register; ----------------- -- Set_Current -- ----------------- procedure Set_Current (Session : Session_Type) is begin Cur_Session.Data := Session.Data; end Set_Current; -------------------------- -- Set_Field_Separators -- -------------------------- procedure Set_Field_Separators (Separators : String := Default_Separators; Session : Session_Type) is begin Free (Session.Data.Separators); Session.Data.Separators := new Split.Separator'(Separators'Length, Separators); -- If there is a current line read, split it according to the new -- separators. if Session.Data.Current_Line /= Null_Unbounded_String then Split_Line (Session); end if; end Set_Field_Separators; procedure Set_Field_Separators (Separators : String := Default_Separators) is begin Set_Field_Separators (Separators, Cur_Session); end Set_Field_Separators; ---------------------- -- Set_Field_Widths -- ---------------------- procedure Set_Field_Widths (Field_Widths : Widths_Set; Session : Session_Type) is begin Free (Session.Data.Separators); Session.Data.Separators := new Split.Column'(Field_Widths'Length, Field_Widths); -- If there is a current line read, split it according to -- the new separators. if Session.Data.Current_Line /= Null_Unbounded_String then Split_Line (Session); end if; end Set_Field_Widths; procedure Set_Field_Widths (Field_Widths : Widths_Set) is begin Set_Field_Widths (Field_Widths, Cur_Session); end Set_Field_Widths; ---------------- -- Split_Line -- ---------------- procedure Split_Line (Session : Session_Type) is Fields : Field_Table.Instance renames Session.Data.Fields; begin Field_Table.Init (Fields); Split.Current_Line (Session.Data.Separators.all, Session); end Split_Line; ------------- -- Get_Def -- ------------- function Get_Def return Session_Data_Access is begin return Def_Session.Data; end Get_Def; ------------- -- Set_Cur -- ------------- procedure Set_Cur is begin Cur_Session.Data := Def_Session.Data; end Set_Cur; begin -- We have declared two sessions but both should share the same data. -- The current session must point to the default session as its initial -- value. So first we release the session data then we set current -- session data to point to default session data. Free (Cur_Session.Data); Cur_Session.Data := Def_Session.Data; end GNAT.AWK;
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