hyung-hwan/hcl
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

added some file io routines

Browse Source
This commit is contained in:
hyung-hwan
2014-06-04 17:15:52 +00:00
parent 60666651c2
commit ef50de7e0f
23 changed files with 5785 additions and 328 deletions
Download Patch File Download Diff File Expand all files Collapse all files

146
h2/lib/posix/h2-sysapi-file.adb
View File

@ -1,45 +1,89 @@
with Interfaces.C;
with H2.Pool;
with H2.Sysdef;
separate (H2.Sysapi)
package body File is
package C renames Interfaces.C;
use type C.int;
-- External functions and procedures
function Sys_Open (path: Slim_String; flags: Sysdef.int_t; mode: Sysdef.int_t) return Sysdef.int_t;
pragma Import (C, Sys_Open, "open");
--function sys_open (path: ; flags: C.int; mode: C.int) return C.int;
function sys_open (path: Slim_String; flags: C.int; mode: C.int) return C.int;
pragma Import (C, sys_open, "open");
procedure sys_close (fd: C.int);
procedure Sys_Close (fd: Sysdef.int_t);
pragma Import (C, sys_close, "close");
INVALID_HANDLE: constant C.int := -1;
function Sys_Read (fd: Sysdef.int_t; buf: in System.Address; count: in Sysdef.size_t) return Sysdef.ssize_t;
pragma Import (C, Sys_Read, "read");
function Sys_Write (fd: Sysdef.int_t; buf: in System.Address; count: in Sysdef.size_t) return Sysdef.ssize_t;
pragma Import (C, Sys_Write, "write");
-- Common constants
INVALID_HANDLE: constant := -1;
ERROR_RETURN: constant := -1;
-- File record
type Posix_File_Record is new File_Record with record
Pool: Storage_Pool_Pointer := null;
Handle: C.int := INVALID_HANDLE;
Handle: Sysdef.int_t := INVALID_HANDLE;
end record;
type Posix_File_Pointer is access all Posix_File_Record;
function Flag_To_System (Bits: in File_Flag_Bits) return C.int is
V: C.int := 0;
-- Standard Files
Stdin: aliased Posix_File_Record := (null, 0);
Stdout: aliased Posix_File_Record := (null, 1);
Stderr: aliased Posix_File_Record := (null, 2);
function Flag_To_System (Bits: in Flag_Bits) return System_Word is
V: System_Word := 0;
begin
-- if Bits and File_Flag_Read /= 0 then
-- V := V or 0;
-- end if;
-- if Bits and File_Flag_Write /= 0 then
-- V := V or 1;
-- end if;
if ((Bits and FLAG_READ) /= 0) and then
((Bits and FLAG_WRITE) /= 0) then
V := V or Sysdef.O_RDWR;
elsif ((Bits and FLAG_WRITE) /= 0) then
V := V or Sysdef.O_WRONLY;
else
V := V or Sysdef.O_RDONLY;
end if;
if ((Bits and FLAG_CREATE) /= 0) then
V := V or Sysdef.O_CREAT;
end if;
if ((Bits and FLAG_TRUNCATE) /= 0) then
V := V or Sysdef.O_TRUNC;
end if;
if ((Bits and FLAG_SYNC) /= 0) then
V := V or Sysdef.O_SYNC;
end if;
return V;
end Flag_To_System;
function Get_Stdin return File_Pointer is
begin
--return File_Pointer'(Stdin'Access);
return File_Record(Stdin)'Access;
end Get_Stdin;
function Get_Stdout return File_Pointer is
begin
--return File_Pointer'(Stdout'Access);
return File_Record(Stdout)'Access;
end Get_Stdout;
function Get_Stderr return File_Pointer is
begin
--return File_Pointer'(Stderr'Access);
return File_Record(Stdout)'Access;
end Get_Stderr;
procedure Open (File: out File_Pointer;
Name: in Slim_String;
Flag: in File_Flag;
Mode: in File_Mode := DEFAULT_FILE_MODE;
Flag: in Flag_Record;
Mode: in Mode_Record := DEFAULT_MODE;
Pool: in Storage_Pool_Pointer := null) is
package P is new H2.Pool (Posix_File_Record, Posix_File_Pointer, Pool);
@ -49,9 +93,10 @@ package body File is
F := P.Allocate;
F.Pool := Pool;
--F.Handle := sys_open (Interfaces.C.char_array(Name & Slim.Character'Val(0)), 0, 0);
F.Handle := sys_open (Name, Flag_To_System(Flag.Bits), C.int(Mode.Bits));
if F.Handle <= -1 then
F.Handle := Sys_Open (Name & Slim_Character'Val(0),
Sysdef.int_t(Flag_To_System(Flag.Bits)),
Sysdef.int_t(Mode.Bits));
if Sysdef."<=" (F.Handle, INVALID_HANDLE) then
raise Constraint_Error; -- TODO: raise a proper exception.
end if;
@ -60,27 +105,58 @@ package body File is
procedure Open (File: out File_Pointer;
Name: in Wide_String;
Flag: in File_Flag;
Mode: in File_Mode := DEFAULT_FILE_MODE;
Flag: in Flag_Record;
Mode: in Mode_Record := DEFAULT_MODE;
Pool: in Storage_Pool_Pointer := null) is
begin
Open (File, Wide_To_Slim(Name), Flag, Mode, Pool);
end Open;
procedure Close (File: in out File_Pointer) is
F: Posix_File_Pointer;
F: Posix_File_Pointer := Posix_File_Pointer(File);
begin
F := Posix_File_Pointer(File);
sys_close (F.Handle);
F.Handle := Interfaces.C."-"(1);
if F /= Stdin'Access and then F /= Stdout'Access and then F /= Stderr'Access then
-- Don't close standard files.
declare
package P is new H2.Pool (Posix_File_Record, Posix_File_Pointer, F.Pool);
begin
P.Deallocate (F);
end;
Sys_Close (F.Handle);
F.Handle := INVALID_HANDLE;
File := null;
declare
package P is new H2.Pool (Posix_File_Record, Posix_File_Pointer, F.Pool);
begin
P.Deallocate (F);
end;
File := null;
end if;
end Close;
procedure Read (File: in File_Pointer; Buffer: in out System_Byte_Array; Last: out System_Length) is
F: Posix_File_Pointer := Posix_File_Pointer(File);
N: Sysdef.ssize_t;
begin
N := Sys_Read (F.Handle, Buffer'Address, Buffer'Length);
if Sysdef."<=" (N, ERROR_RETURN) then
raise Constraint_Error; -- TODO rename exception
elsif Sysdef."=" (N, 0) then
Last := Buffer'First - 1;
else
Last := Buffer'First + System_Length(N) - 1;
end if;
end Read;
procedure Write (File: in File_Pointer; Buffer: in System_Byte_Array; Last: out System_Length) is
F: Posix_File_Pointer := Posix_File_Pointer(File);
N: Sysdef.ssize_t;
begin
N := Sys_Write (F.Handle, Buffer'Address, Buffer'Length);
if Sysdef."<=" (N, ERROR_RETURN) then
raise Constraint_Error; -- TODO rename exception
elsif Sysdef."=" (N, 0) then
Last := Buffer'First - 1;
else
Last := Buffer'First + System_Length(N) - 1;
end if;
end Write;
end File;