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8sa1-gcc/gcc/ada/g-os_lib.adb
Arnaud Charlet 6cdb2c6e80 [multiple changes] 
2004-08-31  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

	* misc.c (gnat_print_type): Use TYPE_RM_SIZE_NUM.

	* trans.c (struct stmt_group): Delete field GLOBAL.
	(gnat_init_stmt_group): Do not initialize it.
	(call_to_gnu): Use save_expr, not protect_multiple_eval.
	(Exception_Handler_to_gnu_sjlj): Call build_int_cst, not build_int_2
	(gnat_to_gnu, case N_Character_Literal, N_String_Literal): Likewise.
	(gnat_to_gnu, case N_Compilation_Unit): Do not set GLOBAL in stmt group.
	(start_stmt_group): Likewise.
	(add_stmt, add_decl_expr): Rework handling of global DECL_EXPRs.

	* utils2.c (ggc.h): Include.
	(build_call_raise): Call build_int_cst, not build_int_2.

	* utils.c (gnat_init_decl_processing): Fix arg to
	build_common_tree_nodes.
	(create_subprog_type): Do not use SET_TYPE_CI_CO_LIST.
	(gnat_define_builtin): Set built_in_decls.
	(init_gigi_decls): Call build_int_cst, not build_int_2.

	* ada-tree.h (struct lang_decl, struct lang_type): Field is type tree.
	(GET_TYPE_LANG_SPECIFIC, SET_TYPE_LANG_SPECIFIC): New macros.
	(GET_DECL_LANG_SPECIFIC, SET_DECL_LANG_SPECIFIC): Likewise.
	(TYPE_CI_CO_LIST, SET_TYPE_CI_CO_LIST, TYPE_MODULE,
	SET_TYPE_MODULE): Use them.
	(TYPE_INDEX_TYPE, SET_TYPE_INDEX_TYPE, TYPE_DIGITS_VALUE): Likewise.
	(SET_TYPE_DIGITS_VALUE, TYPE_UNCONSTRAINED_ARRAY): Likewise.
	(SET_TYPE_UNCONSTRAINED_ARRAY, TYPE_ADA_SIZE,
	SET_TYPE_ADA_SIZE): Likewise.
	(TYPE_ACTUAL_BOUNDS, SET_TYPE_ACTUAL_BOUNDS): Likewise.
	(DECL_CONST_CORRESPONDING_VAR,
	SET_DECL_CONST_CORRESPONDING_VAR): Likewise.
	(DECL_ORIGINAL_FIELD, SET_DECL_ORIGINAL_FIELD): Likewise.
	(TYPE_RM_SIZE_INT, TYPE_RM_SIZE_ENUM, SET_TYPE_RM_SIZE_ENUM): Deleted.
	(TYPE_RM_SIZE_NUM): New macro.
	(TYPE_RM_SIZE): Modified to use above.

	* cuintp.c: (build_cst_from_int): New function.
	(UI_To_gnu): Use it.

	* decl.c (gnat_to_gnu_entity): Use TYPE_RM_SIZE_NUM.
	(make_type_from_size): Avoid changing TYPE_UNSIGNED of a type.
	(gnat_substitute_in_type, case ARRAY_TYPE): If old had a
	MIN_EXPR for the size, copy it into new.

2004-08-31  Robert Dewar  <dewar@gnat.com>

	* exp_ch6.adb (Expand_Call): Properly handle validity checks for
	packed indexed component where array is an IN OUT formal. This
	generated garbage code previously.

	* gnat_ugn.texi: Document -fverbose-asm

	* gnat-style.texi: Minor updates (note that boolean constants and
	variables are joined with AND/OR rather than short circuit forms).

2004-08-31  Ed Schonberg  <schonberg@gnat.com>

	* exp_util.adb (Safe_Unchecked_Type_Conversion): Conversion is safe if
	it is an upward conversion of an untagged type with no representation
	change.

2004-08-31  Thomas Quinot  <quinot@act-europe.fr>

	* rtsfind.ads: Move RCI_Subp_Info and RCI_Subp_Info_Array to
	System.Partition_Interface.

	* checks.adb (Apply_Access_Checks): Do not generate checks when
	expander is not active (but check for unset reference to prefix of
	dereference).

	* sem_prag.adb (Analyze_Pragma, case Pragma_Debug): Uniformly rewrite
	pragma Debug as an if statement with a constant condition, for
	consistent treatment of entity references contained within the
	enclosed procedure call.

2004-08-31  Vincent Celier  <celier@gnat.com>

	* bindgen.adb: (Set_EA_Last): New procedure
	(Gen_Exception_Table_Ada, Gen_Exception_Table_C): Use new procedure
	Set_EA_Last.
	(Gen_Adafinal_Ada): If no finalization, adafinal does nothing
	(Gen_Output_File_Ada): Always call Gen_Adafinal_Ada, so that SAL can be
	linked without errors.
	(Gen_Exception_Table_Ada): Correct bugs when generating code for arrays
	ST and EA.
	(Gen_Exception_Table_C): Correct same bugs

	* vms_data.ads: Add new qualifier /VERBOSE_ASM to GCC_Switches

	* g-os_lib.adb (Normalize_Pathname.Get_Directory): When Dir is empty,
	on Windows, make sure that the drive letter is in upper case.

	* g-os_lib.ads (Normalize_Pathname): Add a comment to indicate that on
	Windows, when the drive letter is added and Case_Sensitive is True, the
	drive letter is forced to upper case.

	* mlib-tgt-irix.adb (Build_Dynamic_Library): Transfer all -lxxx options
	to Options_2 for the call to MLib.Utl.Gcc.

	* bld.adb (Put_Include_Project): Use '/', not '\' on Windows as
	directory separator when defining BASE_DIR.

2004-08-19  Pascal Obry  <obry@gnat.com>

	* gprcmd.adb (Extend): Do not output trailing directory separator. This
	is not needed and it confuses Windows GNU/make which does not report
	directory terminated by a slash as a directory.
	(gprcmd): Idem for "pwd" internal command.

	* Makefile.generic: Use __GPRCOLON__ instead of pipe character in
	target names rewrite to fix regressions with recent version of
	GNU/make. Starting with GNU/make 3.80 the pipe character was not
	handled properly anymore.

From-SVN: r86883
2004-09-01 13:51:54 +02:00

2280 lines
66 KiB
Ada
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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . O S _ L I B --
-- --
-- B o d y --
-- --
-- Copyright (C) 1995-2004 Ada Core Technologies, 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 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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. --
-- --
------------------------------------------------------------------------------
with System.Case_Util;
with System.CRTL;
with System.Soft_Links;
with Unchecked_Conversion;
with System; use System;
package body GNAT.OS_Lib is
OpenVMS : Boolean;
-- Note: OpenVMS should be a constant, but it cannot be, because it
-- prevents bootstrapping on some platforms.
On_Windows : constant Boolean := Directory_Separator = '\';
pragma Import (Ada, OpenVMS, "system__openvms");
-- Needed to avoid doing useless checks when non on a VMS platform (see
-- Normalize_Pathname).
package SSL renames System.Soft_Links;
-- The following are used by Create_Temp_File
Current_Temp_File_Name : String := "GNAT-TEMP-000000.TMP";
-- Name of the temp file last created
Temp_File_Name_Last_Digit : constant Positive :=
Current_Temp_File_Name'Last - 4;
-- Position of the last digit in Current_Temp_File_Name
Max_Attempts : constant := 100;
-- The maximum number of attempts to create a new temp file
-----------------------
-- Local Subprograms --
-----------------------
function Args_Length (Args : Argument_List) return Natural;
-- Returns total number of characters needed to create a string
-- of all Args terminated by ASCII.NUL characters
function C_String_Length (S : Address) return Integer;
-- Returns the length of a C string. Does check for null address
-- (returns 0).
procedure Spawn_Internal
(Program_Name : String;
Args : Argument_List;
Result : out Integer;
Pid : out Process_Id;
Blocking : Boolean);
-- Internal routine to implement the two Spawn (blocking/non blocking)
-- routines. If Blocking is set to True then the spawn is blocking
-- otherwise it is non blocking. In this latter case the Pid contains
-- the process id number. The first three parameters are as in Spawn.
-- Note that Spawn_Internal normalizes the argument list before calling
-- the low level system spawn routines (see Normalize_Arguments). Note
-- that Normalize_Arguments is designed to do nothing if it is called
-- more than once, so calling Normalize_Arguments before calling one
-- of the spawn routines is fine.
function To_Path_String_Access
(Path_Addr : Address;
Path_Len : Integer) return String_Access;
-- Converts a C String to an Ada String. We could do this making use of
-- Interfaces.C.Strings but we prefer not to import that entire package
---------
-- "<" --
---------
function "<" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) < Long_Integer (Y);
end "<";
----------
-- "<=" --
----------
function "<=" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) <= Long_Integer (Y);
end "<=";
---------
-- ">" --
---------
function ">" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) > Long_Integer (Y);
end ">";
----------
-- ">=" --
----------
function ">=" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) >= Long_Integer (Y);
end ">=";
-----------------
-- Args_Length --
-----------------
function Args_Length (Args : Argument_List) return Natural is
Len : Natural := 0;
begin
for J in Args'Range loop
Len := Len + Args (J)'Length + 1; -- One extra for ASCII.NUL
end loop;
return Len;
end Args_Length;
-----------------------------
-- Argument_String_To_List --
-----------------------------
function Argument_String_To_List
(Arg_String : String) return Argument_List_Access
is
Max_Args : constant Integer := Arg_String'Length;
New_Argv : Argument_List (1 .. Max_Args);
New_Argc : Natural := 0;
Idx : Integer;
begin
Idx := Arg_String'First;
loop
exit when Idx > Arg_String'Last;
declare
Quoted : Boolean := False;
Backqd : Boolean := False;
Old_Idx : Integer;
begin
Old_Idx := Idx;
loop
-- An unquoted space is the end of an argument
if not (Backqd or Quoted)
and then Arg_String (Idx) = ' '
then
exit;
-- Start of a quoted string
elsif not (Backqd or Quoted)
and then Arg_String (Idx) = '"'
then
Quoted := True;
-- End of a quoted string and end of an argument
elsif (Quoted and not Backqd)
and then Arg_String (Idx) = '"'
then
Idx := Idx + 1;
exit;
-- Following character is backquoted
elsif Arg_String (Idx) = '\' then
Backqd := True;
-- Turn off backquoting after advancing one character
elsif Backqd then
Backqd := False;
end if;
Idx := Idx + 1;
exit when Idx > Arg_String'Last;
end loop;
-- Found an argument
New_Argc := New_Argc + 1;
New_Argv (New_Argc) :=
new String'(Arg_String (Old_Idx .. Idx - 1));
-- Skip extraneous spaces
while Idx <= Arg_String'Last and then Arg_String (Idx) = ' ' loop
Idx := Idx + 1;
end loop;
end;
end loop;
return new Argument_List'(New_Argv (1 .. New_Argc));
end Argument_String_To_List;
---------------------
-- C_String_Length --
---------------------
function C_String_Length (S : Address) return Integer is
function Strlen (S : Address) return Integer;
pragma Import (C, Strlen, "strlen");
begin
if S = Null_Address then
return 0;
else
return Strlen (S);
end if;
end C_String_Length;
-----------
-- Close --
-----------
procedure Close (FD : File_Descriptor) is
procedure C_Close (FD : File_Descriptor);
pragma Import (C, C_Close, "close");
begin
C_Close (FD);
end Close;
procedure Close (FD : File_Descriptor; Status : out Boolean) is
function C_Close (FD : File_Descriptor) return Integer;
pragma Import (C, C_Close, "close");
begin
Status := (C_Close (FD) = 0);
end Close;
---------------
-- Copy_File --
---------------
procedure Copy_File
(Name : String;
Pathname : String;
Success : out Boolean;
Mode : Copy_Mode := Copy;
Preserve : Attribute := Time_Stamps)
is
From : File_Descriptor;
To : File_Descriptor;
Copy_Error : exception;
-- Internal exception raised to signal error in copy
function Build_Path (Dir : String; File : String) return String;
-- Returns pathname Dir catenated with File adding the directory
-- separator only if needed.
procedure Copy (From, To : File_Descriptor);
-- Read data from From and place them into To. In both cases the
-- operations uses the current file position. Raises Constraint_Error
-- if a problem occurs during the copy.
procedure Copy_To (To_Name : String);
-- Does a straight copy from source to designated destination file
----------------
-- Build_Path --
----------------
function Build_Path (Dir : String; File : String) return String is
Res : String (1 .. Dir'Length + File'Length + 1);
Base_File_Ptr : Integer;
-- The base file name is File (Base_File_Ptr + 1 .. File'Last)
function Is_Dirsep (C : Character) return Boolean;
pragma Inline (Is_Dirsep);
-- Returns True if C is a directory separator. On Windows we
-- handle both styles of directory separator.
---------------
-- Is_Dirsep --
---------------
function Is_Dirsep (C : Character) return Boolean is
begin
return C = Directory_Separator or else C = '/';
end Is_Dirsep;
begin
-- Find base file name
Base_File_Ptr := File'Last;
while Base_File_Ptr >= File'First loop
exit when Is_Dirsep (File (Base_File_Ptr));
Base_File_Ptr := Base_File_Ptr - 1;
end loop;
declare
Base_File : String renames
File (Base_File_Ptr + 1 .. File'Last);
begin
Res (1 .. Dir'Length) := Dir;
if Is_Dirsep (Dir (Dir'Last)) then
Res (Dir'Length + 1 .. Dir'Length + Base_File'Length) :=
Base_File;
return Res (1 .. Dir'Length + Base_File'Length);
else
Res (Dir'Length + 1) := Directory_Separator;
Res (Dir'Length + 2 .. Dir'Length + 1 + Base_File'Length) :=
Base_File;
return Res (1 .. Dir'Length + 1 + Base_File'Length);
end if;
end;
end Build_Path;
----------
-- Copy --
----------
procedure Copy (From, To : File_Descriptor) is
Buf_Size : constant := 200_000;
Buffer : array (1 .. Buf_Size) of Character;
R : Integer;
W : Integer;
Status_From : Boolean;
Status_To : Boolean;
-- Statuses for the calls to Close
begin
if From = Invalid_FD or else To = Invalid_FD then
raise Copy_Error;
end if;
loop
R := Read (From, Buffer (1)'Address, Buf_Size);
-- For VMS, the buffer may not be full. So, we need to try again
-- until there is nothing to read.
exit when R = 0;
W := Write (To, Buffer (1)'Address, R);
if W < R then
-- Problem writing data, could be a disk full. Close files
-- without worrying about status, since we are raising a
-- Copy_Error exception in any case.
Close (From, Status_From);
Close (To, Status_To);
raise Copy_Error;
end if;
end loop;
Close (From, Status_From);
Close (To, Status_To);
if not (Status_From and Status_To) then
raise Copy_Error;
end if;
end Copy;
-------------
-- Copy_To --
-------------
procedure Copy_To (To_Name : String) is
function Copy_Attributes
(From, To : System.Address;
Mode : Integer) return Integer;
pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
-- Mode = 0 - copy only time stamps.
-- Mode = 1 - copy time stamps and read/write/execute attributes
C_From : String (1 .. Name'Length + 1);
C_To : String (1 .. To_Name'Length + 1);
begin
From := Open_Read (Name, Binary);
To := Create_File (To_Name, Binary);
Copy (From, To);
-- Copy attributes
C_From (1 .. Name'Length) := Name;
C_From (C_From'Last) := ASCII.Nul;
C_To (1 .. To_Name'Length) := To_Name;
C_To (C_To'Last) := ASCII.Nul;
case Preserve is
when Time_Stamps =>
if Copy_Attributes (C_From'Address, C_To'Address, 0) = -1 then
raise Copy_Error;
end if;
when Full =>
if Copy_Attributes (C_From'Address, C_To'Address, 1) = -1 then
raise Copy_Error;
end if;
when None =>
null;
end case;
end Copy_To;
-- Start of processing for Copy_File
begin
Success := True;
-- The source file must exist
if not Is_Regular_File (Name) then
raise Copy_Error;
end if;
-- The source file exists
case Mode is
-- Copy case, target file must not exist
when Copy =>
-- If the target file exists, we have an error
if Is_Regular_File (Pathname) then
raise Copy_Error;
-- Case of target is a directory
elsif Is_Directory (Pathname) then
declare
Dest : constant String := Build_Path (Pathname, Name);
begin
-- If the target file exists, we have an error
-- otherwise do the copy.
if Is_Regular_File (Dest) then
raise Copy_Error;
else
Copy_To (Dest);
end if;
end;
-- Case of normal copy to file (destination does not exist)
else
Copy_To (Pathname);
end if;
-- Overwrite case, destination file may or may not exist
when Overwrite =>
if Is_Directory (Pathname) then
Copy_To (Build_Path (Pathname, Name));
else
Copy_To (Pathname);
end if;
-- Appending case, destination file may or may not exist
when Append =>
-- Appending to existing file
if Is_Regular_File (Pathname) then
-- Append mode and destination file exists, append data
-- at the end of Pathname.
From := Open_Read (Name, Binary);
To := Open_Read_Write (Pathname, Binary);
Lseek (To, 0, Seek_End);
Copy (From, To);
-- Appending to directory, not allowed
elsif Is_Directory (Pathname) then
raise Copy_Error;
-- Appending when target file does not exist
else
Copy_To (Pathname);
end if;
end case;
-- All error cases are caught here
exception
when Copy_Error =>
Success := False;
end Copy_File;
procedure Copy_File
(Name : C_File_Name;
Pathname : C_File_Name;
Success : out Boolean;
Mode : Copy_Mode := Copy;
Preserve : Attribute := Time_Stamps)
is
Ada_Name : String_Access :=
To_Path_String_Access
(Name, C_String_Length (Name));
Ada_Pathname : String_Access :=
To_Path_String_Access
(Pathname, C_String_Length (Pathname));
begin
Copy_File (Ada_Name.all, Ada_Pathname.all, Success, Mode, Preserve);
Free (Ada_Name);
Free (Ada_Pathname);
end Copy_File;
----------------------
-- Copy_Time_Stamps --
----------------------
procedure Copy_Time_Stamps (Source, Dest : String; Success : out Boolean) is
function Copy_Attributes
(From, To : System.Address;
Mode : Integer) return Integer;
pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
-- Mode = 0 - copy only time stamps.
-- Mode = 1 - copy time stamps and read/write/execute attributes
begin
if Is_Regular_File (Source) and then Is_Writable_File (Dest) then
declare
C_Source : String (1 .. Source'Length + 1);
C_Dest : String (1 .. Dest'Length + 1);
begin
C_Source (1 .. C_Source'Length) := Source;
C_Source (C_Source'Last) := ASCII.Nul;
C_Dest (1 .. C_Dest'Length) := Dest;
C_Dest (C_Dest'Last) := ASCII.Nul;
if Copy_Attributes (C_Source'Address, C_Dest'Address, 0) = -1 then
Success := False;
else
Success := True;
end if;
end;
else
Success := False;
end if;
end Copy_Time_Stamps;
procedure Copy_Time_Stamps
(Source, Dest : C_File_Name;
Success : out Boolean)
is
Ada_Source : String_Access :=
To_Path_String_Access
(Source, C_String_Length (Source));
Ada_Dest : String_Access :=
To_Path_String_Access
(Dest, C_String_Length (Dest));
begin
Copy_Time_Stamps (Ada_Source.all, Ada_Dest.all, Success);
Free (Ada_Source);
Free (Ada_Dest);
end Copy_Time_Stamps;
-----------------
-- Create_File --
-----------------
function Create_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Create_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Create_File, "__gnat_open_create");
begin
return C_Create_File (Name, Fmode);
end Create_File;
function Create_File
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Create_File (C_Name (C_Name'First)'Address, Fmode);
end Create_File;
---------------------
-- Create_New_File --
---------------------
function Create_New_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Create_New_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Create_New_File, "__gnat_open_new");
begin
return C_Create_New_File (Name, Fmode);
end Create_New_File;
function Create_New_File
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Create_New_File (C_Name (C_Name'First)'Address, Fmode);
end Create_New_File;
-----------------------------
-- Create_Output_Text_File --
-----------------------------
function Create_Output_Text_File (Name : String) return File_Descriptor is
function C_Create_File
(Name : C_File_Name) return File_Descriptor;
pragma Import (C, C_Create_File, "__gnat_create_output_file");
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return C_Create_File (C_Name (C_Name'First)'Address);
end Create_Output_Text_File;
----------------------
-- Create_Temp_File --
----------------------
procedure Create_Temp_File
(FD : out File_Descriptor;
Name : out Temp_File_Name)
is
function Open_New_Temp
(Name : System.Address;
Fmode : Mode) return File_Descriptor;
pragma Import (C, Open_New_Temp, "__gnat_open_new_temp");
begin
FD := Open_New_Temp (Name'Address, Binary);
end Create_Temp_File;
procedure Create_Temp_File
(FD : out File_Descriptor;
Name : out String_Access)
is
Pos : Positive;
Attempts : Natural := 0;
Current : String (Current_Temp_File_Name'Range);
begin
-- Loop until a new temp file can be created
File_Loop : loop
Locked : begin
-- We need to protect global variable Current_Temp_File_Name
-- against concurrent access by different tasks.
SSL.Lock_Task.all;
-- Start at the last digit
Pos := Temp_File_Name_Last_Digit;
Digit_Loop :
loop
-- Increment the digit by one
case Current_Temp_File_Name (Pos) is
when '0' .. '8' =>
Current_Temp_File_Name (Pos) :=
Character'Succ (Current_Temp_File_Name (Pos));
exit Digit_Loop;
when '9' =>
-- For 9, set the digit to 0 and go to the previous digit
Current_Temp_File_Name (Pos) := '0';
Pos := Pos - 1;
when others =>
-- If it is not a digit, then there are no available
-- temp file names. Return Invalid_FD. There is almost
-- no that this code will be ever be executed, since
-- it would mean that there are one million temp files
-- in the same directory!
SSL.Unlock_Task.all;
FD := Invalid_FD;
Name := null;
exit File_Loop;
end case;
end loop Digit_Loop;
Current := Current_Temp_File_Name;
-- We can now release the lock, because we are no longer
-- accessing Current_Temp_File_Name.
SSL.Unlock_Task.all;
exception
when others =>
SSL.Unlock_Task.all;
raise;
end Locked;
-- Attempt to create the file
FD := Create_New_File (Current, Binary);
if FD /= Invalid_FD then
Name := new String'(Current);
exit File_Loop;
end if;
if not Is_Regular_File (Current) then
-- If the file does not already exist and we are unable to create
-- it, we give up after Max_Attempts. Otherwise, we try again with
-- the next available file name.
Attempts := Attempts + 1;
if Attempts >= Max_Attempts then
FD := Invalid_FD;
Name := null;
exit File_Loop;
end if;
end if;
end loop File_Loop;
end Create_Temp_File;
-----------------
-- Delete_File --
-----------------
procedure Delete_File (Name : Address; Success : out Boolean) is
R : Integer;
function unlink (A : Address) return Integer;
pragma Import (C, unlink, "unlink");
begin
R := unlink (Name);
Success := (R = 0);
end Delete_File;
procedure Delete_File (Name : String; Success : out Boolean) is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
Delete_File (C_Name'Address, Success);
end Delete_File;
---------------------
-- File_Time_Stamp --
---------------------
function File_Time_Stamp (FD : File_Descriptor) return OS_Time is
function File_Time (FD : File_Descriptor) return OS_Time;
pragma Import (C, File_Time, "__gnat_file_time_fd");
begin
return File_Time (FD);
end File_Time_Stamp;
function File_Time_Stamp (Name : C_File_Name) return OS_Time is
function File_Time (Name : Address) return OS_Time;
pragma Import (C, File_Time, "__gnat_file_time_name");
begin
return File_Time (Name);
end File_Time_Stamp;
function File_Time_Stamp (Name : String) return OS_Time is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return File_Time_Stamp (F_Name'Address);
end File_Time_Stamp;
---------------------------
-- Get_Debuggable_Suffix --
---------------------------
function Get_Debuggable_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_debuggable_suffix_ptr");
procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
pragma Import (C, Strncpy, "strncpy");
Suffix_Ptr : Address;
Suffix_Length : Integer;
Result : String_Access;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
end if;
return Result;
end Get_Debuggable_Suffix;
---------------------------
-- Get_Executable_Suffix --
---------------------------
function Get_Executable_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_executable_suffix_ptr");
procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
pragma Import (C, Strncpy, "strncpy");
Suffix_Ptr : Address;
Suffix_Length : Integer;
Result : String_Access;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
end if;
return Result;
end Get_Executable_Suffix;
-----------------------
-- Get_Object_Suffix --
-----------------------
function Get_Object_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_object_suffix_ptr");
procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
pragma Import (C, Strncpy, "strncpy");
Suffix_Ptr : Address;
Suffix_Length : Integer;
Result : String_Access;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
end if;
return Result;
end Get_Object_Suffix;
------------
-- Getenv --
------------
function Getenv (Name : String) return String_Access is
procedure Get_Env_Value_Ptr (Name, Length, Ptr : Address);
pragma Import (C, Get_Env_Value_Ptr, "__gnat_get_env_value_ptr");
procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
pragma Import (C, Strncpy, "strncpy");
Env_Value_Ptr : aliased Address;
Env_Value_Length : aliased Integer;
F_Name : aliased String (1 .. Name'Length + 1);
Result : String_Access;
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
Get_Env_Value_Ptr
(F_Name'Address, Env_Value_Length'Address, Env_Value_Ptr'Address);
Result := new String (1 .. Env_Value_Length);
if Env_Value_Length > 0 then
Strncpy (Result.all'Address, Env_Value_Ptr, Env_Value_Length);
end if;
return Result;
end Getenv;
------------
-- GM_Day --
------------
function GM_Day (Date : OS_Time) return Day_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return D;
end GM_Day;
-------------
-- GM_Hour --
-------------
function GM_Hour (Date : OS_Time) return Hour_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return H;
end GM_Hour;
---------------
-- GM_Minute --
---------------
function GM_Minute (Date : OS_Time) return Minute_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Mn;
end GM_Minute;
--------------
-- GM_Month --
--------------
function GM_Month (Date : OS_Time) return Month_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Mo;
end GM_Month;
---------------
-- GM_Second --
---------------
function GM_Second (Date : OS_Time) return Second_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return S;
end GM_Second;
--------------
-- GM_Split --
--------------
procedure GM_Split
(Date : OS_Time;
Year : out Year_Type;
Month : out Month_Type;
Day : out Day_Type;
Hour : out Hour_Type;
Minute : out Minute_Type;
Second : out Second_Type)
is
procedure To_GM_Time
(P_Time_T, P_Year, P_Month, P_Day, P_Hours, P_Mins, P_Secs : Address);
pragma Import (C, To_GM_Time, "__gnat_to_gm_time");
T : OS_Time := Date;
Y : Integer;
Mo : Integer;
D : Integer;
H : Integer;
Mn : Integer;
S : Integer;
begin
-- Use the global lock because To_GM_Time is not thread safe.
Locked_Processing : begin
SSL.Lock_Task.all;
To_GM_Time
(T'Address, Y'Address, Mo'Address, D'Address,
H'Address, Mn'Address, S'Address);
SSL.Unlock_Task.all;
exception
when others =>
SSL.Unlock_Task.all;
raise;
end Locked_Processing;
Year := Y + 1900;
Month := Mo + 1;
Day := D;
Hour := H;
Minute := Mn;
Second := S;
end GM_Split;
-------------
-- GM_Year --
-------------
function GM_Year (Date : OS_Time) return Year_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Y;
end GM_Year;
----------------------
-- Is_Absolute_Path --
----------------------
function Is_Absolute_Path (Name : String) return Boolean is
function Is_Absolute_Path
(Name : Address;
Length : Integer) return Integer;
pragma Import (C, Is_Absolute_Path, "__gnat_is_absolute_path");
begin
return Is_Absolute_Path (Name'Address, Name'Length) /= 0;
end Is_Absolute_Path;
------------------
-- Is_Directory --
------------------
function Is_Directory (Name : C_File_Name) return Boolean is
function Is_Directory (Name : Address) return Integer;
pragma Import (C, Is_Directory, "__gnat_is_directory");
begin
return Is_Directory (Name) /= 0;
end Is_Directory;
function Is_Directory (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Directory (F_Name'Address);
end Is_Directory;
---------------------
-- Is_Regular_File --
---------------------
function Is_Regular_File (Name : C_File_Name) return Boolean is
function Is_Regular_File (Name : Address) return Integer;
pragma Import (C, Is_Regular_File, "__gnat_is_regular_file");
begin
return Is_Regular_File (Name) /= 0;
end Is_Regular_File;
function Is_Regular_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Regular_File (F_Name'Address);
end Is_Regular_File;
----------------------
-- Is_Readable_File --
----------------------
function Is_Readable_File (Name : C_File_Name) return Boolean is
function Is_Readable_File (Name : Address) return Integer;
pragma Import (C, Is_Readable_File, "__gnat_is_readable_file");
begin
return Is_Readable_File (Name) /= 0;
end Is_Readable_File;
function Is_Readable_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Readable_File (F_Name'Address);
end Is_Readable_File;
----------------------
-- Is_Writable_File --
----------------------
function Is_Writable_File (Name : C_File_Name) return Boolean is
function Is_Writable_File (Name : Address) return Integer;
pragma Import (C, Is_Writable_File, "__gnat_is_writable_file");
begin
return Is_Writable_File (Name) /= 0;
end Is_Writable_File;
function Is_Writable_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Writable_File (F_Name'Address);
end Is_Writable_File;
----------------------
-- Is_Symbolic_Link --
----------------------
function Is_Symbolic_Link (Name : C_File_Name) return Boolean is
function Is_Symbolic_Link (Name : Address) return Integer;
pragma Import (C, Is_Symbolic_Link, "__gnat_is_symbolic_link");
begin
return Is_Symbolic_Link (Name) /= 0;
end Is_Symbolic_Link;
function Is_Symbolic_Link (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Symbolic_Link (F_Name'Address);
end Is_Symbolic_Link;
-------------------------
-- Locate_Exec_On_Path --
-------------------------
function Locate_Exec_On_Path
(Exec_Name : String) return String_Access
is
function Locate_Exec_On_Path (C_Exec_Name : Address) return Address;
pragma Import (C, Locate_Exec_On_Path, "__gnat_locate_exec_on_path");
procedure Free (Ptr : System.Address);
pragma Import (C, Free, "free");
C_Exec_Name : String (1 .. Exec_Name'Length + 1);
Path_Addr : Address;
Path_Len : Integer;
Result : String_Access;
begin
C_Exec_Name (1 .. Exec_Name'Length) := Exec_Name;
C_Exec_Name (C_Exec_Name'Last) := ASCII.NUL;
Path_Addr := Locate_Exec_On_Path (C_Exec_Name'Address);
Path_Len := C_String_Length (Path_Addr);
if Path_Len = 0 then
return null;
else
Result := To_Path_String_Access (Path_Addr, Path_Len);
Free (Path_Addr);
return Result;
end if;
end Locate_Exec_On_Path;
-------------------------
-- Locate_Regular_File --
-------------------------
function Locate_Regular_File
(File_Name : C_File_Name;
Path : C_File_Name) return String_Access
is
function Locate_Regular_File
(C_File_Name, Path_Val : Address) return Address;
pragma Import (C, Locate_Regular_File, "__gnat_locate_regular_file");
procedure Free (Ptr : System.Address);
pragma Import (C, Free, "free");
Path_Addr : Address;
Path_Len : Integer;
Result : String_Access;
begin
Path_Addr := Locate_Regular_File (File_Name, Path);
Path_Len := C_String_Length (Path_Addr);
if Path_Len = 0 then
return null;
else
Result := To_Path_String_Access (Path_Addr, Path_Len);
Free (Path_Addr);
return Result;
end if;
end Locate_Regular_File;
function Locate_Regular_File
(File_Name : String;
Path : String) return String_Access
is
C_File_Name : String (1 .. File_Name'Length + 1);
C_Path : String (1 .. Path'Length + 1);
begin
C_File_Name (1 .. File_Name'Length) := File_Name;
C_File_Name (C_File_Name'Last) := ASCII.NUL;
C_Path (1 .. Path'Length) := Path;
C_Path (C_Path'Last) := ASCII.NUL;
return Locate_Regular_File (C_File_Name'Address, C_Path'Address);
end Locate_Regular_File;
------------------------
-- Non_Blocking_Spawn --
------------------------
function Non_Blocking_Spawn
(Program_Name : String;
Args : Argument_List) return Process_Id
is
Junk : Integer;
Pid : Process_Id;
begin
Spawn_Internal (Program_Name, Args, Junk, Pid, Blocking => False);
return Pid;
end Non_Blocking_Spawn;
-------------------------
-- Normalize_Arguments --
-------------------------
procedure Normalize_Arguments (Args : in out Argument_List) is
procedure Quote_Argument (Arg : in out String_Access);
-- Add quote around argument if it contains spaces
C_Argument_Needs_Quote : Integer;
pragma Import (C, C_Argument_Needs_Quote, "__gnat_argument_needs_quote");
Argument_Needs_Quote : constant Boolean := C_Argument_Needs_Quote /= 0;
--------------------
-- Quote_Argument --
--------------------
procedure Quote_Argument (Arg : in out String_Access) is
Res : String (1 .. Arg'Length * 2);
J : Positive := 1;
Quote_Needed : Boolean := False;
begin
if Arg (Arg'First) /= '"' or else Arg (Arg'Last) /= '"' then
-- Starting quote
Res (J) := '"';
for K in Arg'Range loop
J := J + 1;
if Arg (K) = '"' then
Res (J) := '\';
J := J + 1;
Res (J) := '"';
Quote_Needed := True;
elsif Arg (K) = ' ' then
Res (J) := Arg (K);
Quote_Needed := True;
else
Res (J) := Arg (K);
end if;
end loop;
if Quote_Needed then
-- If null terminated string, put the quote before
if Res (J) = ASCII.Nul then
Res (J) := '"';
J := J + 1;
Res (J) := ASCII.Nul;
-- If argument is terminated by '\', then double it. Otherwise
-- the ending quote will be taken as-is. This is quite strange
-- spawn behavior from Windows, but this is what we see!
else
if Res (J) = '\' then
J := J + 1;
Res (J) := '\';
end if;
-- Ending quote
J := J + 1;
Res (J) := '"';
end if;
declare
Old : String_Access := Arg;
begin
Arg := new String'(Res (1 .. J));
Free (Old);
end;
end if;
end if;
end Quote_Argument;
begin
if Argument_Needs_Quote then
for K in Args'Range loop
if Args (K) /= null and then Args (K)'Length /= 0 then
Quote_Argument (Args (K));
end if;
end loop;
end if;
end Normalize_Arguments;
------------------------
-- Normalize_Pathname --
------------------------
function Normalize_Pathname
(Name : String;
Directory : String := "";
Resolve_Links : Boolean := True;
Case_Sensitive : Boolean := True) return String
is
Max_Path : Integer;
pragma Import (C, Max_Path, "__gnat_max_path_len");
-- Maximum length of a path name
procedure Get_Current_Dir
(Dir : System.Address;
Length : System.Address);
pragma Import (C, Get_Current_Dir, "__gnat_get_current_dir");
function Change_Dir (Dir_Name : String) return Integer;
pragma Import (C, Change_Dir, "chdir");
Path_Buffer : String (1 .. Max_Path + Max_Path + 2);
End_Path : Natural := 0;
Link_Buffer : String (1 .. Max_Path + 2);
Status : Integer;
Last : Positive;
Start : Natural;
Finish : Positive;
Max_Iterations : constant := 500;
function Get_File_Names_Case_Sensitive return Integer;
pragma Import
(C, Get_File_Names_Case_Sensitive,
"__gnat_get_file_names_case_sensitive");
Fold_To_Lower_Case : constant Boolean :=
not Case_Sensitive
and then Get_File_Names_Case_Sensitive = 0;
function Readlink
(Path : System.Address;
Buf : System.Address;
Bufsiz : Integer) return Integer;
pragma Import (C, Readlink, "__gnat_readlink");
function To_Canonical_File_Spec
(Host_File : System.Address) return System.Address;
pragma Import
(C, To_Canonical_File_Spec, "__gnat_to_canonical_file_spec");
The_Name : String (1 .. Name'Length + 1);
Canonical_File_Addr : System.Address;
Canonical_File_Len : Integer;
Need_To_Check_Drive_Letter : Boolean := False;
-- Set to true if Name is an absolute path that starts with "//"
function Strlen (S : System.Address) return Integer;
pragma Import (C, Strlen, "strlen");
function Get_Directory (Dir : String) return String;
-- If Dir is not empty, return it, adding a directory separator
-- if not already present, otherwise return current working directory
-- with terminating directory separator.
function Final_Value (S : String) return String;
-- Make final adjustment to the returned string.
-- To compensate for non standard path name in Interix,
-- if S is "/x" or starts with "/x", where x is a capital
-- letter 'A' to 'Z', add an additional '/' at the beginning
-- so that the returned value starts with "//x".
-------------------
-- Get_Directory --
-------------------
function Get_Directory (Dir : String) return String is
begin
-- Directory given, add directory separator if needed
if Dir'Length > 0 then
if Dir (Dir'Length) = Directory_Separator then
return Directory;
else
declare
Result : String (1 .. Dir'Length + 1);
begin
Result (1 .. Dir'Length) := Dir;
Result (Result'Length) := Directory_Separator;
return Result;
end;
end if;
-- Directory name not given, get current directory
else
declare
Buffer : String (1 .. Max_Path + 2);
Path_Len : Natural := Max_Path;
begin
Get_Current_Dir (Buffer'Address, Path_Len'Address);
if Buffer (Path_Len) /= Directory_Separator then
Path_Len := Path_Len + 1;
Buffer (Path_Len) := Directory_Separator;
end if;
-- By default, the drive letter on Windows is in upper case
if On_Windows and then Path_Len >= 2 and then
Buffer (2) = ':'
then
System.Case_Util.To_Upper (Buffer (1 .. 1));
end if;
return Buffer (1 .. Path_Len);
end;
end if;
end Get_Directory;
Reference_Dir : constant String := Get_Directory (Directory);
-- Current directory name specified
-----------------
-- Final_Value --
-----------------
function Final_Value (S : String) return String is
S1 : String := S;
-- We may need to fold S to lower case, so we need a variable
Last : Natural;
begin
-- Interix has the non standard notion of disk drive
-- indicated by two '/' followed by a capital letter
-- 'A' .. 'Z'. One of the two '/' may have been removed
-- by Normalize_Pathname. It has to be added again.
-- For other OSes, this should not make no difference.
if Need_To_Check_Drive_Letter
and then S'Length >= 2
and then S (S'First) = '/'
and then S (S'First + 1) in 'A' .. 'Z'
and then (S'Length = 2 or else S (S'First + 2) = '/')
then
declare
Result : String (1 .. S'Length + 1);
begin
Result (1) := '/';
Result (2 .. Result'Last) := S;
Last := Result'Last;
if Fold_To_Lower_Case then
System.Case_Util.To_Lower (Result);
end if;
-- Remove trailing directory separator, if any
if Last > 1 and then
(Result (Last) = '/' or else
Result (Last) = Directory_Separator)
then
Last := Last - 1;
end if;
return Result (1 .. Last);
end;
else
if Fold_To_Lower_Case then
System.Case_Util.To_Lower (S1);
end if;
-- Remove trailing directory separator, if any
Last := S1'Last;
if Last > 1
and then (S1 (Last) = '/'
or else
S1 (Last) = Directory_Separator)
then
-- Special case for Windows: C:\
if Last = 3
and then S1 (1) /= Directory_Separator
and then S1 (2) = ':'
then
null;
else
Last := Last - 1;
end if;
end if;
return S1 (1 .. Last);
end if;
end Final_Value;
-- Start of processing for Normalize_Pathname
begin
-- Special case, if name is null, then return null
if Name'Length = 0 then
return "";
end if;
-- First, convert VMS file spec to Unix file spec.
-- If Name is not in VMS syntax, then this is equivalent
-- to put Name at the begining of Path_Buffer.
VMS_Conversion : begin
The_Name (1 .. Name'Length) := Name;
The_Name (The_Name'Last) := ASCII.NUL;
Canonical_File_Addr := To_Canonical_File_Spec (The_Name'Address);
Canonical_File_Len := Strlen (Canonical_File_Addr);
-- If VMS syntax conversion has failed, return an empty string
-- to indicate the failure.
if Canonical_File_Len = 0 then
return "";
end if;
declare
subtype Path_String is String (1 .. Canonical_File_Len);
type Path_String_Access is access Path_String;
function Address_To_Access is new
Unchecked_Conversion (Source => Address,
Target => Path_String_Access);
Path_Access : constant Path_String_Access :=
Address_To_Access (Canonical_File_Addr);
begin
Path_Buffer (1 .. Canonical_File_Len) := Path_Access.all;
End_Path := Canonical_File_Len;
Last := 1;
end;
end VMS_Conversion;
-- Replace all '/' by Directory Separators (this is for Windows)
if Directory_Separator /= '/' then
for Index in 1 .. End_Path loop
if Path_Buffer (Index) = '/' then
Path_Buffer (Index) := Directory_Separator;
end if;
end loop;
end if;
-- Resolve directory names for VMS and Windows
-- On VMS, if we have a Unix path such as /temp/..., and TEMP is a
-- logical name, we need to resolve this logical name.
-- On Windows, if we have an absolute path starting with a directory
-- separator, we need to have the drive letter appended in front.
-- For both platforms, Get_Current_Dir will return a suitable
-- directory name (logical names resolved on VMS, path starting with
-- a drive letter on Windows). So we find the directory, change to it,
-- call Get_Current_Dir and change the directory to the returned value.
-- Then, of course, we return to the previous directory.
if (OpenVMS or On_Windows)
and then Path_Buffer (1) = Directory_Separator
then
declare
Cur_Dir : String := Get_Directory ("");
-- Save the current directory, so that we can change dir back to
-- it. It is not a constant, because the last character (a
-- directory separator) is changed to ASCII.NUL to call the C
-- function chdir.
Path : String := Path_Buffer (1 .. End_Path + 1);
-- Copy of the current path. One character is added that may be
-- set to ASCII.NUL to call chdir.
Pos : Positive := End_Path;
-- Position of the last directory separator
Status : Integer;
-- Value returned by chdir
begin
-- Look for the last directory separator
while Path (Pos) /= Directory_Separator loop
Pos := Pos - 1;
end loop;
-- Get the previous character that is not a directory separator
while Pos > 1 and then Path (Pos) = Directory_Separator loop
Pos := Pos - 1;
end loop;
-- If we are at the start of the path, take the full path.
-- It may be a file in the root directory, but it may also be
-- a subdirectory of the root directory.
if Pos = 1 then
Pos := End_Path;
end if;
-- Add the ASCII.NUL to be able to call the C function chdir
Path (Pos + 1) := ASCII.NUL;
Status := Change_Dir (Path (1 .. Pos + 1));
-- If Status is not zero, then we do nothing: this is a file
-- path or it is not a valid directory path.
if Status = 0 then
declare
New_Dir : constant String := Get_Directory ("");
-- The directory path
New_Path : String (1 .. New_Dir'Length + End_Path - Pos);
-- The new complete path, that is built below
begin
New_Path (1 .. New_Dir'Length) := New_Dir;
New_Path (New_Dir'Length + 1 .. New_Path'Last) :=
Path_Buffer (Pos + 1 .. End_Path);
End_Path := New_Path'Length;
Path_Buffer (1 .. End_Path) := New_Path;
end;
-- Back to where we were before
Cur_Dir (Cur_Dir'Last) := ASCII.NUL;
Status := Change_Dir (Cur_Dir);
end if;
end;
end if;
-- Start the conversions
-- If this is not finished after Max_Iterations, give up and
-- return an empty string.
for J in 1 .. Max_Iterations loop
-- If we don't have an absolute pathname, prepend
-- the directory Reference_Dir.
if Last = 1
and then not Is_Absolute_Path (Path_Buffer (1 .. End_Path))
then
Path_Buffer
(Reference_Dir'Last + 1 .. Reference_Dir'Length + End_Path) :=
Path_Buffer (1 .. End_Path);
End_Path := Reference_Dir'Length + End_Path;
Path_Buffer (1 .. Reference_Dir'Length) := Reference_Dir;
Last := Reference_Dir'Length;
end if;
-- If name starts with "//", we may have a drive letter on Interix
if Last = 1 and then End_Path >= 3 then
Need_To_Check_Drive_Letter := (Path_Buffer (1 .. 2)) = "//";
end if;
Start := Last + 1;
Finish := Last;
-- Ensure that Windows network drives are kept, e.g: \\server\drive-c
if Start = 2
and then Directory_Separator = '\'
and then Path_Buffer (1 .. 2) = "\\"
then
Start := 3;
end if;
-- If we have traversed the full pathname, return it
if Start > End_Path then
return Final_Value (Path_Buffer (1 .. End_Path));
end if;
-- Remove duplicate directory separators
while Path_Buffer (Start) = Directory_Separator loop
if Start = End_Path then
return Final_Value (Path_Buffer (1 .. End_Path - 1));
else
Path_Buffer (Start .. End_Path - 1) :=
Path_Buffer (Start + 1 .. End_Path);
End_Path := End_Path - 1;
end if;
end loop;
-- Find the end of the current field: last character
-- or the one preceding the next directory separator.
while Finish < End_Path
and then Path_Buffer (Finish + 1) /= Directory_Separator
loop
Finish := Finish + 1;
end loop;
-- Remove "." field
if Start = Finish and then Path_Buffer (Start) = '.' then
if Start = End_Path then
if Last = 1 then
return (1 => Directory_Separator);
else
if Fold_To_Lower_Case then
System.Case_Util.To_Lower (Path_Buffer (1 .. Last - 1));
end if;
return Path_Buffer (1 .. Last - 1);
end if;
else
Path_Buffer (Last + 1 .. End_Path - 2) :=
Path_Buffer (Last + 3 .. End_Path);
End_Path := End_Path - 2;
end if;
-- Remove ".." fields
elsif Finish = Start + 1
and then Path_Buffer (Start .. Finish) = ".."
then
Start := Last;
loop
Start := Start - 1;
exit when Start < 1 or else
Path_Buffer (Start) = Directory_Separator;
end loop;
if Start <= 1 then
if Finish = End_Path then
return (1 => Directory_Separator);
else
Path_Buffer (1 .. End_Path - Finish) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - Finish;
Last := 1;
end if;
else
if Finish = End_Path then
return Final_Value (Path_Buffer (1 .. Start - 1));
else
Path_Buffer (Start + 1 .. Start + End_Path - Finish - 1) :=
Path_Buffer (Finish + 2 .. End_Path);
End_Path := Start + End_Path - Finish - 1;
Last := Start;
end if;
end if;
-- Check if current field is a symbolic link
elsif Resolve_Links then
declare
Saved : constant Character := Path_Buffer (Finish + 1);
begin
Path_Buffer (Finish + 1) := ASCII.NUL;
Status := Readlink (Path_Buffer'Address,
Link_Buffer'Address,
Link_Buffer'Length);
Path_Buffer (Finish + 1) := Saved;
end;
-- Not a symbolic link, move to the next field, if any
if Status <= 0 then
Last := Finish + 1;
-- Replace symbolic link with its value.
else
if Is_Absolute_Path (Link_Buffer (1 .. Status)) then
Path_Buffer (Status + 1 .. End_Path - (Finish - Status)) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - (Finish - Status);
Path_Buffer (1 .. Status) := Link_Buffer (1 .. Status);
Last := 1;
else
Path_Buffer
(Last + Status + 1 .. End_Path - Finish + Last + Status) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - Finish + Last + Status;
Path_Buffer (Last + 1 .. Last + Status) :=
Link_Buffer (1 .. Status);
end if;
end if;
else
Last := Finish + 1;
end if;
end loop;
-- Too many iterations: give up
-- This can happen when there is a circularity in the symbolic links:
-- A is a symbolic link for B, which itself is a symbolic link, and
-- the target of B or of another symbolic link target of B is A.
-- In this case, we return an empty string to indicate failure to
-- resolve.
return "";
end Normalize_Pathname;
---------------
-- Open_Read --
---------------
function Open_Read
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Open_Read
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Open_Read, "__gnat_open_read");
begin
return C_Open_Read (Name, Fmode);
end Open_Read;
function Open_Read
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Open_Read (C_Name (C_Name'First)'Address, Fmode);
end Open_Read;
---------------------
-- Open_Read_Write --
---------------------
function Open_Read_Write
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Open_Read_Write
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Open_Read_Write, "__gnat_open_rw");
begin
return C_Open_Read_Write (Name, Fmode);
end Open_Read_Write;
function Open_Read_Write
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Open_Read_Write (C_Name (C_Name'First)'Address, Fmode);
end Open_Read_Write;
----------
-- Read --
----------
function Read
(FD : File_Descriptor;
A : System.Address;
N : Integer) return Integer
is
begin
return Integer (System.CRTL.read
(System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));
end Read;
-----------------
-- Rename_File --
-----------------
procedure Rename_File
(Old_Name : C_File_Name;
New_Name : C_File_Name;
Success : out Boolean)
is
function rename (From, To : Address) return Integer;
pragma Import (C, rename, "rename");
R : Integer;
begin
R := rename (Old_Name, New_Name);
Success := (R = 0);
end Rename_File;
procedure Rename_File
(Old_Name : String;
New_Name : String;
Success : out Boolean)
is
C_Old_Name : String (1 .. Old_Name'Length + 1);
C_New_Name : String (1 .. New_Name'Length + 1);
begin
C_Old_Name (1 .. Old_Name'Length) := Old_Name;
C_Old_Name (C_Old_Name'Last) := ASCII.NUL;
C_New_Name (1 .. New_Name'Length) := New_Name;
C_New_Name (C_New_Name'Last) := ASCII.NUL;
Rename_File (C_Old_Name'Address, C_New_Name'Address, Success);
end Rename_File;
------------
-- Setenv --
------------
procedure Setenv (Name : String; Value : String) is
F_Name : String (1 .. Name'Length + 1);
F_Value : String (1 .. Value'Length + 1);
procedure Set_Env_Value (Name, Value : System.Address);
pragma Import (C, Set_Env_Value, "__gnat_set_env_value");
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
F_Value (1 .. Value'Length) := Value;
F_Value (F_Value'Last) := ASCII.NUL;
Set_Env_Value (F_Name'Address, F_Value'Address);
end Setenv;
-----------
-- Spawn --
-----------
function Spawn
(Program_Name : String;
Args : Argument_List) return Integer
is
Junk : Process_Id;
Result : Integer;
begin
Spawn_Internal (Program_Name, Args, Result, Junk, Blocking => True);
return Result;
end Spawn;
procedure Spawn
(Program_Name : String;
Args : Argument_List;
Success : out Boolean)
is
begin
Success := (Spawn (Program_Name, Args) = 0);
end Spawn;
--------------------
-- Spawn_Internal --
--------------------
procedure Spawn_Internal
(Program_Name : String;
Args : Argument_List;
Result : out Integer;
Pid : out Process_Id;
Blocking : Boolean)
is
procedure Spawn (Args : Argument_List);
-- Call Spawn.
N_Args : Argument_List (Args'Range);
-- Normalized arguments
-----------
-- Spawn --
-----------
procedure Spawn (Args : Argument_List) is
type Chars is array (Positive range <>) of aliased Character;
type Char_Ptr is access constant Character;
Command_Len : constant Positive := Program_Name'Length + 1
+ Args_Length (Args);
Command_Last : Natural := 0;
Command : aliased Chars (1 .. Command_Len);
-- Command contains all characters of the Program_Name and Args,
-- all terminated by ASCII.NUL characters
Arg_List_Len : constant Positive := Args'Length + 2;
Arg_List_Last : Natural := 0;
Arg_List : aliased array (1 .. Arg_List_Len) of Char_Ptr;
-- List with pointers to NUL-terminated strings of the
-- Program_Name and the Args and terminated with a null pointer.
-- We rely on the default initialization for the last null pointer.
procedure Add_To_Command (S : String);
-- Add S and a NUL character to Command, updating Last
function Portable_Spawn (Args : Address) return Integer;
pragma Import (C, Portable_Spawn, "__gnat_portable_spawn");
function Portable_No_Block_Spawn (Args : Address) return Process_Id;
pragma Import
(C, Portable_No_Block_Spawn, "__gnat_portable_no_block_spawn");
--------------------
-- Add_To_Command --
--------------------
procedure Add_To_Command (S : String) is
First : constant Natural := Command_Last + 1;
begin
Command_Last := Command_Last + S'Length;
-- Move characters one at a time, because Command has
-- aliased components.
for J in S'Range loop
Command (First + J - S'First) := S (J);
end loop;
Command_Last := Command_Last + 1;
Command (Command_Last) := ASCII.NUL;
Arg_List_Last := Arg_List_Last + 1;
Arg_List (Arg_List_Last) := Command (First)'Access;
end Add_To_Command;
-- Start of processing for Spawn
begin
Add_To_Command (Program_Name);
for J in Args'Range loop
Add_To_Command (Args (J).all);
end loop;
if Blocking then
Pid := Invalid_Pid;
Result := Portable_Spawn (Arg_List'Address);
else
Pid := Portable_No_Block_Spawn (Arg_List'Address);
Result := Boolean'Pos (Pid /= Invalid_Pid);
end if;
end Spawn;
-- Start of processing for Spawn_Internal
begin
-- Copy arguments into a local structure
for K in N_Args'Range loop
N_Args (K) := new String'(Args (K).all);
end loop;
-- Normalize those arguments
Normalize_Arguments (N_Args);
-- Call spawn using the normalized arguments
Spawn (N_Args);
-- Free arguments list
for K in N_Args'Range loop
Free (N_Args (K));
end loop;
end Spawn_Internal;
---------------------------
-- To_Path_String_Access --
---------------------------
function To_Path_String_Access
(Path_Addr : Address;
Path_Len : Integer) return String_Access
is
subtype Path_String is String (1 .. Path_Len);
type Path_String_Access is access Path_String;
function Address_To_Access is new
Unchecked_Conversion (Source => Address,
Target => Path_String_Access);
Path_Access : constant Path_String_Access :=
Address_To_Access (Path_Addr);
Return_Val : String_Access;
begin
Return_Val := new String (1 .. Path_Len);
for J in 1 .. Path_Len loop
Return_Val (J) := Path_Access (J);
end loop;
return Return_Val;
end To_Path_String_Access;
------------------
-- Wait_Process --
------------------
procedure Wait_Process (Pid : out Process_Id; Success : out Boolean) is
Status : Integer;
function Portable_Wait (S : Address) return Process_Id;
pragma Import (C, Portable_Wait, "__gnat_portable_wait");
begin
Pid := Portable_Wait (Status'Address);
Success := (Status = 0);
end Wait_Process;
-----------
-- Write --
-----------
function Write
(FD : File_Descriptor;
A : System.Address;
N : Integer) return Integer
is
begin
return Integer (System.CRTL.write
(System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));
end Write;
end GNAT.OS_Lib;
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