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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- F N A M E --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2024, 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. 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 COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body Fname is
function Has_Internal_Extension (Fname : String) return Boolean;
pragma Inline (Has_Internal_Extension);
-- True if the extension is appropriate for an internal/predefined unit.
-- That means ".ads" or ".adb" for source files, and ".ali" for ALI files.
function Has_Prefix (X, Prefix : String) return Boolean;
pragma Inline (Has_Prefix);
-- True if Prefix is at the beginning of X. For example,
-- Has_Prefix ("a-filename.ads", Prefix => "a-") is True.
----------------------------
-- Has_Internal_Extension --
----------------------------
function Has_Internal_Extension (Fname : String) return Boolean is
begin
if Fname'Length >= 4 then
declare
S : String renames Fname (Fname'Last - 3 .. Fname'Last);
begin
return S = ".ads" or else S = ".adb" or else S = ".ali";
end;
end if;
return False;
end Has_Internal_Extension;
----------------
-- Has_Prefix --
----------------
function Has_Prefix (X, Prefix : String) return Boolean is
begin
if X'Length >= Prefix'Length then
declare
S : String renames X (X'First .. X'First + Prefix'Length - 1);
begin
return S = Prefix;
end;
end if;
return False;
end Has_Prefix;
-----------------------
-- Is_GNAT_File_Name --
-----------------------
function Is_GNAT_File_Name (Fname : String) return Boolean is
begin
-- Check for internal extensions before checking prefixes, so we don't
-- think (e.g.) "gnat.adc" is internal.
if not Has_Internal_Extension (Fname) then
return False;
end if;
-- Definitely internal if prefix is g-
if Has_Prefix (Fname, "g-") then
return True;
end if;
-- See the note in Is_Predefined_File_Name for the rationale
return Fname'Length = 8 and then Has_Prefix (Fname, "gnat");
end Is_GNAT_File_Name;
function Is_GNAT_File_Name (Fname : File_Name_Type) return Boolean is
Result : constant Boolean :=
Is_GNAT_File_Name (Get_Name_String (Fname));
begin
return Result;
end Is_GNAT_File_Name;
---------------------------
-- Is_Internal_File_Name --
---------------------------
function Is_Internal_File_Name
(Fname : String;
Renamings_Included : Boolean := True) return Boolean
is
begin
if Is_Predefined_File_Name (Fname, Renamings_Included) then
return True;
end if;
return Is_GNAT_File_Name (Fname);
end Is_Internal_File_Name;
function Is_Internal_File_Name
(Fname : File_Name_Type;
Renamings_Included : Boolean := True) return Boolean
is
Result : constant Boolean :=
Is_Internal_File_Name
(Get_Name_String (Fname), Renamings_Included);
begin
return Result;
end Is_Internal_File_Name;
-----------------------------
-- Is_Predefined_File_Name --
-----------------------------
function Is_Predefined_File_Name
(Fname : String;
Renamings_Included : Boolean := True) return Boolean
is
begin
-- Definitely false if longer than 12 characters (8.3), except for the
-- Interfaces packages and also the implementation units of the 128-bit
-- types under System.
if Fname'Length > 12
and then Fname (Fname'First .. Fname'First + 1) /= "i-"
and then Fname (Fname'First .. Fname'First + 1) /= "s-"
then
return False;
end if;
if not Has_Internal_Extension (Fname) then
return False;
end if;
-- Definitely predefined if prefix is a- i- or s-
if Fname'Length >= 2 then
declare
S : String renames Fname (Fname'First .. Fname'First + 1);
begin
if S = "a-" or else S = "i-" or else S = "s-" then
return True;
end if;
end;
end if;
-- We include the "." in the prefixes below, so we don't match (e.g.)
-- adamant.ads. So the first line matches "ada.ads", "ada.adb", and
-- "ada.ali". But that's not necessary if they have 8 characters.
if Has_Prefix (Fname, "ada.") -- Ada
or else Has_Prefix (Fname, "interfac") -- Interfaces
or else Has_Prefix (Fname, "system.a") -- System
then
return True;
end if;
-- If instructed and the name has 8+ characters, check for renamings
if Renamings_Included
and then Is_Predefined_Renaming_File_Name (Fname)
then
return True;
end if;
return False;
end Is_Predefined_File_Name;
function Is_Predefined_File_Name
(Fname : File_Name_Type;
Renamings_Included : Boolean := True) return Boolean
is
Result : constant Boolean :=
Is_Predefined_File_Name
(Get_Name_String (Fname), Renamings_Included);
begin
return Result;
end Is_Predefined_File_Name;
--------------------------------------
-- Is_Predefined_Renaming_File_Name --
--------------------------------------
function Is_Predefined_Renaming_File_Name
(Fname : String) return Boolean
is
subtype Str8 is String (1 .. 8);
Renaming_Names : constant array (1 .. 8) of Str8 :=
("calendar", -- Calendar
"machcode", -- Machine_Code
"unchconv", -- Unchecked_Conversion
"unchdeal", -- Unchecked_Deallocation
"directio", -- Direct_IO
"ioexcept", -- IO_Exceptions
"sequenio", -- Sequential_IO
"text_io."); -- Text_IO
begin
-- Definitely false if longer than 12 characters (8.3)
if Fname'Length in 8 .. 12 then
declare
S : String renames Fname (Fname'First .. Fname'First + 7);
begin
for J in Renaming_Names'Range loop
if S = Renaming_Names (J) then
return True;
end if;
end loop;
end;
end if;
return False;
end Is_Predefined_Renaming_File_Name;
function Is_Predefined_Renaming_File_Name
(Fname : File_Name_Type) return Boolean is
Result : constant Boolean :=
Is_Predefined_Renaming_File_Name (Get_Name_String (Fname));
begin
return Result;
end Is_Predefined_Renaming_File_Name;
end Fname;
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