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200 | with Ada.Command_Line; use Ada.Command_Line;
with Ada.Containers.Vectors;
with Ada.Directories; use Ada.Directories;
with Ada.Environment_Variables;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Text_IO; use Ada.Text_IO;
with GNAT.OS_Lib;
with GNATCOLL.File_Paths; use GNATCOLL.File_Paths;
with GNATCOLL.Mmap;
with Langkit_Support.Diagnostics; use Langkit_Support.Diagnostics;
with Libadalang.Preprocessing; use Libadalang.Preprocessing;
procedure LAL_Prep is
package String_Vectors is new Ada.Containers.Vectors
(Positive, Unbounded_String);
procedure Error (Message : String) with No_Return;
-- Print the given error message and exit with an non-zero status code
-----------
-- Error --
-----------
procedure Error (Message : String) is
begin
Put_Line (Message);
GNAT.OS_Lib.OS_Exit (1);
end Error;
function Starts_With (Value, Substring : String) return Boolean
is (Value'Length >= Substring'Length
and then
Value (Value'First .. Value'First + Substring'Length - 1) = Substring);
-- Return whether the first bytes of ``Value`` are equal to ``Substring``
-- Decoded values for command-line arguments. Note that we do not use
-- ``GNATCOLL.Opt_Parse`` because we need to process "-b" and "-c" options
-- as affecting the same decoded value (-b sets it to one value, -c sets it
-- to another value), which is not possible with ``GNATCOLL.Opt_Parse``
-- right now.
package Args is
Line_Mode : Any_Line_Mode := Delete_Lines;
Line_Mode_Passed : Boolean := False;
Definitions : String_Vectors.Vector;
Data_File : Unbounded_String;
Undefined_Is_False : Boolean := False;
Undefined_Is_False_Passed : Boolean := False;
In_File : Unbounded_String;
end Args;
Cfg : File_Config;
Contents : Preprocessed_Source;
Diagnostics : Diagnostics_Vectors.Vector;
I : Positive := 1;
begin
-- Parse command-line arguments
while I <= Argument_Count loop
declare
Arg : constant String := Argument (I);
begin
if Arg = "-b" then
Args.Line_Mode := Blank_Lines;
Args.Line_Mode_Passed := True;
elsif Arg = "-c" then
Args.Line_Mode := Comment_Lines;
Args.Line_Mode_Passed := True;
elsif Arg = "-u" then
Args.Undefined_Is_False := True;
Args.Undefined_Is_False_Passed := True;
elsif Starts_With (Arg, "-D") then
Args.Definitions.Append
(To_Unbounded_String (Arg (Arg'First + 2 .. Arg'Last)));
elsif Starts_With (Arg, "-d") then
if Arg = "-d" then
I := I + 1;
if I > Argument_Count then
Error ("Value missing for -d");
end if;
Args.Data_File := To_Unbounded_String (Argument (I));
else
Args.Data_File := To_Unbounded_String (Arg);
end if;
elsif Starts_With (Arg, "-") then
Error ("Invalid option: " & Arg);
elsif Length (Args.In_File) = 0 then
Args.In_File := To_Unbounded_String (Arg);
else
Error ("Too many positional arguments");
end if;
end;
I := I + 1;
end loop;
-- If we are given a preprocessing data file, load it and get the
-- configuration for the source to preprocess.
declare
Data_File : constant String := To_String (Args.Data_File);
begin
if Data_File /= "" then
declare
use File_Config_Maps;
Path : constant Any_Path := Parse_Path
(Ada.Environment_Variables.Value ("ADA_INCLUDE_PATH", ""));
Default_Config : File_Config;
File_Configs : File_Config_Maps.Map;
Basename : Unbounded_String;
Cur : Cursor;
begin
Parse_Preprocessor_Data_File
(Data_File, Path, Default_Config, File_Configs);
Basename := To_Unbounded_String
(Simple_Name (To_String (Args.In_File)));
Cur := File_Configs.Find (Basename);
Cfg := (if Has_Element (Cur)
then Element (Cur)
else Default_Config);
end;
end if;
end;
-- Regardless of what the data file said, force preprocessing on this file
if not Cfg.Enabled then
Cfg := (Enabled => True, others => <>);
end if;
-- Update the configuration from other options
if Args.Line_Mode_Passed then
Cfg.Line_Mode := Args.Line_Mode;
end if;
for Def of Args.Definitions loop
declare
Name : Unbounded_String;
Value : Value_Type;
begin
Parse_Definition_Option (To_String (Def), Name, Value);
Cfg.Definitions.Include (Name, Value);
end;
end loop;
if Args.Undefined_Is_False_Passed then
Cfg.Undefined_Is_False := Args.Undefined_Is_False;
end if;
-- Finally read and preprocess the input source file
declare
use GNATCOLL.Mmap;
File : Mapped_File := Open_Read (To_String (Args.In_File));
Region : Mapped_Region := Read (File);
Buffer : constant Str_Access := Data (Region);
Input : String renames Buffer (1 .. Last (Region));
begin
Preprocess (Cfg, Input, Contents, Diagnostics);
Free (Region);
Close (File);
end;
-- Print diagnostics
for D of Diagnostics loop
Put_Line (To_Pretty_String (D));
end loop;
-- Print the output buffer. If the last byte is a LF, do not emit it, as
-- Ada.Text_IO will automatically insert it anyway.
declare
Last : constant Natural :=
(if Contents.Last > 0
and then Contents.Buffer (Contents.Last) = ASCII.LF
then Contents.Last - 1
else Contents.Last);
begin
Put_Line (Contents.Buffer (1 .. Last));
end;
Free (Contents);
end LAL_Prep;
|