/usr/share/ada/adainclude/asis/asis-text.adb is in libasis2010-dev 2010-3.
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-- --
-- ASIS-for-GNAT IMPLEMENTATION COMPONENTS --
-- --
-- A S I S . T E X T --
-- --
-- B o d y --
-- --
-- Copyright (C) 1995-2008, Free Software Foundation, Inc. --
-- --
-- ASIS-for-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 --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIS-for-GNAT is distributed in the hope that it will be use- --
-- ful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY 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 ASIS-for-GNAT; see file --
-- COPYING. If not, write to the Free Software Foundation, 51 Franklin --
-- Street, Fifth Floor, Boston, MA 02110-1301, USA. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- ASIS-for-GNAT was originally developed by the ASIS-for-GNAT team at the --
-- Software Engineering Laboratory of the Swiss Federal Institute of --
-- Technology (LGL-EPFL) in Lausanne, Switzerland, in cooperation with the --
-- Scientific Research Computer Center of Moscow State University (SRCC --
-- MSU), Russia, with funding partially provided by grants from the Swiss --
-- National Science Foundation and the Swiss Academy of Engineering --
-- Sciences. ASIS-for-GNAT is now maintained by AdaCore --
-- (http://www.adacore.com). --
-- --
------------------------------------------------------------------------------
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Asis; use Asis;
with Asis.Compilation_Units; use Asis.Compilation_Units;
with Asis.Elements; use Asis.Elements;
with Asis.Errors; use Asis.Errors;
with Asis.Exceptions; use Asis.Exceptions;
with Asis.Set_Get; use Asis.Set_Get;
with Asis.Text.Set_Get; use Asis.Text.Set_Get;
with A4G.A_Debug; use A4G.A_Debug;
with A4G.A_Sinput; use A4G.A_Sinput;
with A4G.Contt; use A4G.Contt;
with A4G.Contt.TT; use A4G.Contt.TT;
with A4G.Contt.UT; use A4G.Contt.UT;
with A4G.Span_Beginning; use A4G.Span_Beginning;
with A4G.Span_End; use A4G.Span_End;
with A4G.Vcheck; use A4G.Vcheck;
with Namet; use Namet;
with Output; use Output;
with Sinput; use Sinput;
package body Asis.Text is
-------------------
-- Comment_Image --
-------------------
function Comment_Image
(The_Line : Asis.Text.Line)
return Wide_String
is
begin
Check_Validity (The_Line, "Asis.Text.Comment_Image");
if The_Line.Length = 0 then
-- just a small optimization
return "";
end if;
declare
The_Line_Image : Wide_String := Line_Image (The_Line);
Comment_Pos : constant Source_Ptr := Comment_Beginning
(Text_Buffer (To_String (The_Line_Image)));
begin
if Comment_Pos = No_Location then
-- no comment in this string
return "";
else
-- we have to pad the beginning (that is, non-comment part)
-- of the line image by white spaces, making difference between
-- HT and other symbols:
for I in The_Line_Image'First .. Natural (Comment_Pos) - 1 loop
if To_Character (The_Line_Image (I)) /= ASCII.HT then
The_Line_Image (I) := ' ';
end if;
end loop;
return The_Line_Image;
end if;
end;
exception
when ASIS_Inappropriate_Line =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information (Outer_Call => "Asis.Text.Comment_Image");
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Comment_Image",
Arg_Line => The_Line,
Ex => Ex);
end Comment_Image;
----------------------
-- Compilation_Span --
----------------------
function Compilation_Span
(Element : Asis.Element)
return Asis.Text.Span
is
Result_Span : Asis.Text.Span := Asis.Text.Nil_Span;
S_P : Source_Ptr;
S_P_Last : Source_Ptr;
SFI : Source_File_Index;
Src : Source_Buffer_Ptr;
Last_Line : Physical_Line_Number;
begin
Check_Validity (Element, "Asis.Text.Compilation_Span");
-- In case of GNAT compilations are source files, so there is no need
-- to compute Result_Span.First_Line and Result_Span.First_Column -
-- the correct values are (1, 1) , and they come from Nil_Span
S_P := Get_Location (Element);
-- this makes all the rest "tree-swapping-safe"
if S_P > Standard_Location then
SFI := Get_Source_File_Index (S_P);
Src := Source_Text (SFI);
Last_Line := Last_Source_Line (SFI);
Result_Span.Last_Line := Line_Number (Last_Line);
S_P := Line_Start (Last_Line, SFI);
S_P_Last := S_P + 1;
while not (S_P_Last = Source_Last (SFI) or else
Src (S_P_Last) = ASCII.LF or else
Src (S_P_Last) = ASCII.CR)
loop
S_P_Last := S_P_Last + 1;
end loop;
Result_Span.Last_Column := Character_Position (S_P_Last - S_P);
end if;
return Result_Span;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Compilation_Span",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Compilation_Span",
Arg_Element => Element,
Ex => Ex);
end Compilation_Span;
---------------------------
-- Compilation_Unit_Span --
---------------------------
function Compilation_Unit_Span
(Element : Asis.Element)
return Asis.Text.Span
is
Result_Span : Asis.Text.Span := Asis.Text.Nil_Span;
CU : Asis.Compilation_Unit;
First_El : Asis.Element;
Unit : Asis.Element;
No_Cont_Clause : Boolean := True;
Span_Start : Source_Ptr;
Span_End : Source_Ptr;
begin
Check_Validity (Element, "Asis.Text.Compilation_Unit_Span");
-- First, check that the argument Element is not from the predefined
-- Standard package.
Span_Start := Get_Location (Element);
-- this makes all the rest "tree-swapping-safe"
if Span_Start > Standard_Location then
CU := Enclosing_Compilation_Unit (Element);
Unit := Unit_Declaration (CU);
declare
Cont_Cl_Elms : constant Asis.Context_Clause_List :=
Context_Clause_Elements
(Compilation_Unit => CU,
Include_Pragmas => True);
begin
if Is_Nil (Cont_Cl_Elms) then
First_El := Unit;
else
First_El := Cont_Cl_Elms (Cont_Cl_Elms'First);
No_Cont_Clause := False;
end if;
end;
Span_Start := Set_Image_Beginning (First_El);
if No_Cont_Clause then
-- For private unit declarations and for subunits we have to take
-- into account syntax elements which are not a part of the
-- corresponding unit declaration element
case Unit_Class (CU) is
when A_Private_Declaration =>
-- Taking into account leading 'private' keyword
Span_Start := Search_Prev_Word_Start (Span_Start);
when A_Separate_Body =>
-- Taking into account 'separate (...)"
Span_Start := Search_Left_Parenthesis (Span_Start);
Span_Start := Search_Prev_Word_Start (Span_Start);
when others =>
null;
end case;
end if;
Span_End := Set_Image_End (Unit);
Result_Span := Source_Locations_To_Span (Span_Start, Span_End);
end if;
return Result_Span;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Compilation_Unit_Span",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Compilation_Unit_Span",
Arg_Element => Element,
Ex => Ex);
end Compilation_Unit_Span;
-----------------
-- Debug_Image --
-----------------
function Debug_Image
(The_Line : Asis.Text.Line)
return Wide_String
is
LT : String renames ASIS_Line_Terminator;
S : constant Source_Ptr := Line_Location (The_Line);
-- this makes the rest "tree-swapping-safe"
Sindex : constant Source_File_Index := Get_Source_File_Index (S);
F_Name : constant File_Name_Type := File_Name (Sindex);
T : constant Tree_Id := The_Line.Enclosing_Tree;
C : constant Context_Id := The_Line.Enclosing_Context;
Tree_Name : String_Ptr;
begin
Check_Validity (The_Line, "Asis.Text.Debug_Image");
if Present (T) then
Get_Name_String (C, T);
Tree_Name :=
new String'(A_Name_Buffer (1 .. A_Name_Len) &
" (Tree_Id =" & Tree_Id'Image (T) & ")");
else
Tree_Name := new String'(" <nil tree>");
end if;
Get_Name_String (F_Name);
return To_Wide_String
("Debug image for Asis.Text.Line:"
& LT
& " obtained from file " & Name_Buffer (1 .. Name_Len)
& LT
& " Absolute (relative) location in source file :"
& Source_Ptr'Image (S)
& " ("
& Source_Ptr'Image (The_Line.Rel_Sloc)
& ')'
& LT
& " Line :"
& Physical_Line_Number'Image (Get_Physical_Line_Number (S))
& LT
& " Column:"
& Source_Ptr'Image (A_Get_Column_Number (S))
& LT
& " Number of characters in line:"
& Asis.Text.Character_Position'Image (Line_Length (The_Line))
& LT
& " obtained from the tree "
& Tree_Name.all);
exception
when ASIS_Inappropriate_Line =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information (Outer_Call => "Asis.Text.Debug_Image");
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Debug_Image",
Arg_Line => The_Line,
Ex => Ex);
end Debug_Image;
---------------------
-- Delimiter_Image --
---------------------
function Delimiter_Image return Wide_String is
begin
return Asis_Wide_Line_Terminator;
end Delimiter_Image;
-------------------
-- Element_Image --
-------------------
function Element_Image
(Element : Asis.Element)
return Wide_String
is
begin
Check_Validity (Element, "Asis.Text.Element_Image");
if not Is_Text_Available (Element) then
return "";
end if;
declare
LList : constant Asis.Text.Line_List := Lines (Element);
-- We create the Element Image from Lines containing the Element
Spaces : Natural;
-- The number of characters in the first line of the Image, which
-- should be padded by white spaces
Numb : Natural;
-- Yere we collect the whole number of characters needed in the
-- string representing the result Element image. Note that we are
-- counting in wide characters
begin
Spaces := Natural (Element_Span (Element).First_Column) - 1;
Numb := Asis.ASIS_Natural (Spaces) +
Asis.ASIS_Natural (LList'Last - LList'First) *
Asis.ASIS_Natural (Asis_Wide_Line_Terminator'Length);
for I in LList'First .. LList'Last loop
Numb := Numb + Natural (Line_Length (LList (I)));
end loop;
declare
Result : Wide_String (1 .. Numb);
In_Str : Positive := 1;
begin
-- The image of the first line may contain spaces padding the part
-- of the physal line that precedes the element
Result (In_Str ..
In_Str + Spaces + Line_Length (LList (LList'First)) - 1) :=
Line_Image (LList (LList'First));
In_Str := In_Str + Spaces + Line_Length (LList (LList'First));
-- and now - filling the rest of Result_String
-- by the "proper" Element Image
for Linee in LList'First + 1 .. LList'Last loop
Result (In_Str .. In_Str + ASIS_Line_Terminator'Length - 1)
:= Asis_Wide_Line_Terminator;
In_Str := In_Str + Asis_Wide_Line_Terminator'Length;
Result (In_Str .. In_Str + Line_Length (LList (Linee)) - 1) :=
Line_Image (LList (Linee));
In_Str := In_Str + Line_Length (LList (Linee));
end loop;
return Result;
end;
end;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Element_Image",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis_Text.Element_Image",
Arg_Element => Element,
Ex => Ex);
end Element_Image;
------------------
-- Element_Span --
------------------
-- Element_Span is "tree-swapping-safe"!
function Element_Span (Element : Asis.Element) return Asis.Text.Span is
Sp : Asis.Text.Span := Asis.Text.Nil_Span;
Span_Start : Source_Ptr;
Span_End : Source_Ptr;
begin
Check_Validity (Element, "Asis.Text.Element_Span");
if Debug_Flag_X or else Debug_Mode then
Write_Str ("*** Asis.Text.Element_Span ***");
Write_Eol;
Write_Str ("Element kind is ");
Write_Str (Internal_Element_Kinds'Image (Int_Kind (Element)));
Write_Eol;
end if;
if not Is_Text_Available (Element) then
if Debug_Flag_X or else Debug_Mode then
Write_Str ("!!! Text isn't available !!!");
Write_Eol;
end if;
return Sp;
end if;
-- Set_Image_Beginning is "tree-swapping-safe"
Span_Start := Set_Image_Beginning (Element);
Span_End := Set_Image_End (Element);
Sp := Source_Locations_To_Span (Span_Start, Span_End);
if Debug_Flag_X or else Debug_Mode then
Write_Str ("Returning Asis.Text.Span parameters:");
Write_Eol;
Write_Str (Debug_Image (Sp));
Write_Eol;
end if;
return Sp;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Element_Span",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Element_Span",
Arg_Element => Element,
Ex => Ex);
end Element_Span;
-----------------------
-- First_Line_Number --
-----------------------
function First_Line_Number (Element : Asis.Element) return Line_Number is
Sp : Asis.Text.Span;
begin
Check_Validity (Element, "Asis.Text.First_Line_Number");
if Is_Text_Available (Element) then
Sp := Element_Span (Element);
return Sp.First_Line;
else
return 0;
end if;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.First_Line_Number",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.First_Line_Number",
Arg_Element => Element,
Ex => Ex);
end First_Line_Number;
--------------
-- Is_Equal --
--------------
function Is_Equal
(Left : Asis.Text.Line;
Right : Asis.Text.Line)
return Boolean
is
C_Left : Context_Id;
C_Right : Context_Id;
U_Left : Unit_Id;
U_Right : Unit_Id;
begin
Check_Validity (Left, "Asis.Text.Is_Equal");
Check_Validity (Right, "Asis.Text.Is_Equal");
-- Two lines which are Is_Equal may be obtained from different
-- Context, and they may be based on different trees. But to
-- be Is_Equal, they have to represent the same portion of the
-- source text from the same source file
if Left.Length /= Right.Length or else
Left.Rel_Sloc /= Right.Rel_Sloc
then
return False;
else
-- we use just the same approach as for comparing Elements
C_Left := Left.Enclosing_Context;
U_Left := Left.Enclosing_Unit;
C_Right := Right.Enclosing_Context;
U_Right := Right.Enclosing_Unit;
return Time_Stamp (C_Left, U_Left) = Time_Stamp (C_Right, U_Right);
end if;
exception
when ASIS_Inappropriate_Line =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information (Outer_Call => "Asis.Text.Is_Equal");
end if;
raise;
when Ex : others =>
-- Note, that in case of failure the very primitive diagnosis will be
-- generated. If the implementation of this query become more
-- sophisticated, we'll probably need two Line parameters for
-- Report_ASIS_Bug procedure
Report_ASIS_Bug
(Query_Name => "Asis.Text.Is_Equal",
Ex => Ex);
end Is_Equal;
------------------
-- Is_Identical --
------------------
function Is_Identical
(Left : Asis.Text.Line;
Right : Asis.Text.Line)
return Boolean
is
begin
Check_Validity (Left, "Asis.Text.Is_Identical");
Check_Validity (Right, "Asis.Text.Is_Identical");
return (Left.Length = Right.Length and then
Left.Rel_Sloc = Right.Rel_Sloc and then
Left.Enclosing_Context = Right.Enclosing_Context and then
Left.Enclosing_Unit = Right.Enclosing_Unit);
end Is_Identical;
------------
-- Is_Nil --
------------
function Is_Nil (Right : Asis.Text.Line) return Boolean is
Result : Boolean;
begin
-- Here we have to simulate the predefined "=" operation for
-- Line as if it is called as 'Right + Nil_Line'
Result := Right.Sloc = No_Location and then
Right.Length = 0 and then
Right.Rel_Sloc = No_Location and then
Right.Enclosing_Unit = Nil_Unit and then
Right.Enclosing_Context = Non_Associated and then
Right.Enclosing_Tree = Nil_Tree and then
Right.Obtained = Nil_ASIS_OS_Time;
return Result;
end Is_Nil;
function Is_Nil (Right : Asis.Text.Line_List) return Boolean is
begin
return Right'Length = 0;
end Is_Nil;
function Is_Nil (Right : Asis.Text.Span) return Boolean is
begin
return (Right.Last_Line < Right.First_Line) or else
((Right.Last_Line = Right.First_Line) and then
(Right.Last_Column < Right.First_Column));
end Is_Nil;
-----------------------
-- Is_Text_Available --
-----------------------
function Is_Text_Available (Element : Asis.Element) return Boolean is
El_Kind : constant Internal_Element_Kinds := Int_Kind (Element);
Spec_Case : constant Special_Cases := Special_Case (Element);
begin
Check_Validity (Element,
"Asis.Text.Is_Text_Available");
if El_Kind = Not_An_Element or else
Is_From_Implicit (Element) or else
Is_From_Instance (Element) or else
Normalization_Case (Element) /= Is_Not_Normalized or else
Spec_Case in Explicit_From_Standard .. Stand_Char_Literal
then
return False;
else
return True;
end if;
end Is_Text_Available;
----------------------
-- Last_Line_Number --
----------------------
function Last_Line_Number
(Element : Asis.Element)
return Asis.Text.Line_Number
is
Sp : Asis.Text.Span;
begin
Check_Validity (Element, "Asis.Text.Last_Line_Number");
if Is_Text_Available (Element) then
Sp := Element_Span (Element);
return Sp.Last_Line;
else
return 0;
end if;
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Last_Line_Number",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Last_Line_Number",
Arg_Element => Element,
Ex => Ex);
end Last_Line_Number;
------------
-- Length --
------------
function Length
(The_Line : Asis.Text.Line)
return Asis.Text.Character_Position
is
begin
Check_Validity (The_Line, "Asis.Text.Length");
return Line_Length (The_Line);
end Length;
----------------
-- Line_Image --
----------------
function Line_Image (The_Line : Asis.Text.Line) return Wide_String is
begin
Check_Validity (The_Line, "Asis.Text.Line_Image");
if Line_Length (The_Line) = 0 then
return "";
end if;
declare
ASIS_Line_Start : constant Source_Ptr := Line_Location (The_Line);
S : Source_Ptr := Line_Start (ASIS_Line_Start);
Space_Len : constant Natural :=
Natural (ASIS_Line_Start - S);
Space_String : Wide_String (1 .. Space_Len);
-- We cannot have more padding white spaces then Space_Len
Space_Num : Natural := 0;
-- Counter for padding spaces
Sindex : constant Source_File_Index := Get_Source_File_Index (S);
Src : constant Source_Buffer_Ptr := Source_Text (Sindex);
Line_Wide_Img : constant Wide_String := Line_Wide_Image (The_Line);
begin
-- first, padding the beginning of the image if needed:
while S < ASIS_Line_Start loop
Space_Num := Space_Num + 1;
if Get_Character (S) = ASCII.HT then
Space_String (Space_Num) := To_Wide_Character (ASCII.HT);
S := S + 1;
elsif Is_Start_Of_Wide_Char_For_ASIS (Src, S) then
Skip_Wide_For_ASIS (Src, S);
Space_String (Space_Num) := ' ';
else
Space_String (Space_Num) := ' ';
S := S + 1;
end if;
end loop;
return Space_String (1 .. Space_Num) & Line_Wide_Img;
end;
exception
when ASIS_Inappropriate_Line =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information (Outer_Call => "Asis.Text.Line_Image");
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Line_Image",
Arg_Line => The_Line,
Ex => Ex);
end Line_Image;
---------------------
-- Lines (Element) --
---------------------
function Lines (Element : Asis.Element) return Asis.Text.Line_List is
begin
Check_Validity (Element, "Asis.Text.Lines (Element)");
if not Is_Text_Available (Element) then
return Nil_Line_List;
end if;
return Lines (Element, Element_Span (Element));
exception
when ASIS_Inappropriate_Element =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Lines (Element)",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Lines (Element)",
Arg_Element => Element,
Ex => Ex);
end Lines;
---------------------------
-- Lines (Element, Span) --
---------------------------
function Lines
(Element : Asis.Element;
The_Span : Asis.Text.Span)
return Asis.Text.Line_List
is
begin
Check_Validity (Element, "Asis.Text.Lines (Element, Span)");
if not Is_Text_Available (Element) then
return Nil_Line_List;
end if;
if Is_Nil (The_Span) or else
The_Span.Last_Line > Line_Number (Number_Of_Lines (Element))
then
Raise_ASIS_Inappropriate_Line_Number ("Lines (Element, Span)");
end if;
declare
LList : Asis.Text.Line_List :=
Lines (Element, The_Span.First_Line, The_Span.Last_Line);
-- this call to Lines is "tree-swapping-safe";
-- note also, that this call to Lines should not raise
-- any exception, because all the checks are already done
First_Line : constant Line_Number := LList'First;
Last_Line : constant Line_Number := LList'Last;
First_Line_Sloc : Source_Ptr := Line_Location (LList (First_Line));
-- Needs adjustment if The_Span does does not start from the first
-- column.
Count : Character_Position;
Sindex : constant Source_File_Index :=
Get_Source_File_Index (First_Line_Sloc);
Src : constant Source_Buffer_Ptr := Source_Text (Sindex);
begin
-- and now we have to adjust the first and the last line in LList:
-- for the first line both the line location and the line length
-- should be adjusted, for the last line - the line length only;
-- the case when there is only one line is special:
if The_Span.First_Column > 1 then
Count := The_Span.First_Column - 1;
while Count > 0 loop
if Is_Start_Of_Wide_Char_For_ASIS (Src, First_Line_Sloc) then
Skip_Wide_For_ASIS (Src, First_Line_Sloc);
else
First_Line_Sloc := First_Line_Sloc + 1;
end if;
Count := Count - 1;
end loop;
Set_Line_Location
(L => LList (First_Line),
S => First_Line_Sloc);
end if;
if First_Line = Last_Line then
-- Special case when there is only one line.
Set_Line_Length
(L => LList (First_Line),
N => The_Span.Last_Column - The_Span.First_Column + 1);
else
Set_Line_Length
(L => LList (First_Line),
N => Line_Length (LList (First_Line)) -
The_Span.First_Column + 1);
Set_Line_Length
(L => LList (Last_Line),
N => The_Span.Last_Column);
end if;
return LList;
end;
exception
when ASIS_Inappropriate_Element | ASIS_Inappropriate_Line_Number =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call => "Asis.Text.Lines (Element, Asis.Text.Span)",
Argument => Element);
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Lines (Element, Asis.Text.Span)",
Arg_Element => Element,
Arg_Span => The_Span,
Ex => Ex);
end Lines;
--------------------------------------------
-- Lines (Element, First_Line, Last_Line) --
--------------------------------------------
function Lines
(Element : Asis.Element;
First_Line : Line_Number_Positive;
Last_Line : Line_Number)
return Asis.Text.Line_List
is
Result_List : Line_List (First_Line .. Last_Line);
-- there is no harm to define result list here, because the
-- real work with it will be started when all the tests are passed.
begin
Check_Validity
(Element, "Asis.Text.Lines (Element, First_Line, Last_Line)");
if Is_Nil (Element) then
return Nil_Line_List;
end if;
if First_Line > Last_Line or else -- ???
Last_Line > Line_Number (Number_Of_Lines (Element))
then
Raise_ASIS_Inappropriate_Line_Number
("Asis.Text.Lines (Element, First_Line, Last_Line)");
end if;
-- if we are here, we have Result_List consisting of Nil_Lines,
-- and we know, that all the conditions for returning the
-- proper Line_List are met. So we have to make proper settings
-- for the fields of all the Lines from Result_List
Set_Lines (Result_List, Element);
-- this is "tree-swapping-safe"
return Result_List;
exception
when ASIS_Inappropriate_Element | ASIS_Inappropriate_Line_Number =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information
(Outer_Call =>
"Asis.Text.Lines (Asis.Element, First_Line, Last_Line)",
Argument => Element);
end if;
raise;
when Ex : others =>
-- We construct the fake Span value to pass the line numbers into
-- the diagnosis
Report_ASIS_Bug
(Query_Name =>
"Asis.Text.Lines (Asis.Element, First_Line, Last_Line)",
Arg_Element => Element,
Arg_Span => (First_Line => First_Line,
First_Column => 1,
Last_Line => Last_Line,
Last_Column => Character_Position'Last),
Ex => Ex);
end Lines;
-----------------------
-- Non_Comment_Image --
-----------------------
function Non_Comment_Image
(The_Line : Asis.Text.Line)
return Wide_String
is
begin
Check_Validity (The_Line, "Asis.Text.Non_Comment_Image");
if The_Line.Length = 0 then
-- just a small optimization
return "";
end if;
declare
The_Line_Image : constant Wide_String := Line_Image (The_Line);
Comment_Pos : constant Source_Ptr := Comment_Beginning
(Text_Buffer (To_String (The_Line_Image)));
begin
if Comment_Pos = No_Location then
-- no comment in this Line
return The_Line_Image;
else
return The_Line_Image
(The_Line_Image'First .. Natural (Comment_Pos) - 1);
end if;
end;
exception
when ASIS_Inappropriate_Line =>
raise;
when ASIS_Failed =>
if Status_Indicator = Unhandled_Exception_Error then
Add_Call_Information (Outer_Call => "Asis.Text.Non_Comment_Image");
end if;
raise;
when Ex : others =>
Report_ASIS_Bug
(Query_Name => "Asis.Text.Non_Comment_Image",
Arg_Line => The_Line,
Ex => Ex);
end Non_Comment_Image;
end Asis.Text;
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