(*
Copyright 2016, 2018 Anton Krotov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE File;
IMPORT sys := SYSTEM, KOSAPI;
CONST
SEEK_BEG* = 0; SEEK_CUR* = 1; SEEK_END* = 2;
TYPE
FNAME* = ARRAY 520 OF CHAR;
FS* = POINTER TO rFS;
rFS* = RECORD
subfunc*, pos*, hpos*, bytes*, buffer*: INTEGER;
name*: FNAME
END;
FD* = POINTER TO rFD;
rFD* = RECORD
attr*: INTEGER;
ntyp*: CHAR;
reserved: ARRAY 3 OF CHAR;
time_create*, date_create*,
time_access*, date_access*,
time_modif*, date_modif*,
size*, hsize*: INTEGER;
name*: FNAME
END;
PROCEDURE [stdcall] f_68_27 (file_name: INTEGER; VAR size: INTEGER): INTEGER;
BEGIN
sys.CODE(
053H, (* push ebx *)
06AH, 044H, (* push 68 *)
058H, (* pop eax *)
06AH, 01BH, (* push 27 *)
05BH, (* pop ebx *)
08BH, 04DH, 008H, (* mov ecx, dword [ebp + 8] *)
0CDH, 040H, (* int 64 *)
08BH, 04DH, 00CH, (* mov ecx, dword [ebp + 12] *)
089H, 011H, (* mov dword [ecx], edx *)
05BH, (* pop ebx *)
0C9H, (* leave *)
0C2H, 008H, 000H (* ret 8 *)
)
RETURN 0
END f_68_27;
PROCEDURE Load* (FName: ARRAY OF CHAR; VAR size: INTEGER): INTEGER;
RETURN f_68_27(sys.ADR(FName[0]), size)
END Load;
PROCEDURE GetFileInfo* (FName: ARRAY OF CHAR; VAR Info: rFD): BOOLEAN;
VAR
res2: INTEGER; fs: rFS;
BEGIN
fs.subfunc := 5;
fs.pos := 0;
fs.hpos := 0;
fs.bytes := 0;
fs.buffer := sys.ADR(Info);
COPY(FName, fs.name)
RETURN KOSAPI.sysfunc22(70, sys.ADR(fs), res2) = 0
END GetFileInfo;
PROCEDURE Exists* (FName: ARRAY OF CHAR): BOOLEAN;
VAR
fd: rFD;
BEGIN
RETURN GetFileInfo(FName, fd) & ~(4 IN BITS(fd.attr))
END Exists;
PROCEDURE Close* (VAR F: FS);
BEGIN
IF F # NIL THEN
DISPOSE(F)
END
END Close;
PROCEDURE Open* (FName: ARRAY OF CHAR): FS;
VAR
F: FS;
BEGIN
IF Exists(FName) THEN
NEW(F);
IF F # NIL THEN
F.subfunc := 0;
F.pos := 0;
F.hpos := 0;
F.bytes := 0;
F.buffer := 0;
COPY(FName, F.name)
END
ELSE
F := NIL
END
RETURN F
END Open;
PROCEDURE Delete* (FName: ARRAY OF CHAR): BOOLEAN;
VAR
F: FS;
res, res2: INTEGER;
BEGIN
IF Exists(FName) THEN
NEW(F);
IF F # NIL THEN
F.subfunc := 8;
F.pos := 0;
F.hpos := 0;
F.bytes := 0;
F.buffer := 0;
COPY(FName, F.name);
res := KOSAPI.sysfunc22(70, sys.ADR(F^), res2);
DISPOSE(F)
ELSE
res := -1
END
ELSE
res := -1
END
RETURN res = 0
END Delete;
PROCEDURE Seek* (F: FS; Offset, Origin: INTEGER): INTEGER;
VAR
res: INTEGER;
fd: rFD;
BEGIN
IF (F # NIL) & GetFileInfo(F.name, fd) & (BITS(fd.attr) * {4} = {}) THEN
CASE Origin OF
|SEEK_BEG: F.pos := Offset
|SEEK_CUR: F.pos := F.pos + Offset
|SEEK_END: F.pos := fd.size + Offset
ELSE
END;
res := F.pos
ELSE
res := -1
END
RETURN res
END Seek;
PROCEDURE Read* (F: FS; Buffer, Count: INTEGER): INTEGER;
VAR
res, res2: INTEGER;
BEGIN
IF F # NIL THEN
F.subfunc := 0;
F.bytes := Count;
F.buffer := Buffer;
res := KOSAPI.sysfunc22(70, sys.ADR(F^), res2);
IF res2 > 0 THEN
F.pos := F.pos + res2
END
ELSE
res2 := 0
END
RETURN res2
END Read;
PROCEDURE Write* (F: FS; Buffer, Count: INTEGER): INTEGER;
VAR
res, res2: INTEGER;
BEGIN
IF F # NIL THEN
F.subfunc := 3;
F.bytes := Count;
F.buffer := Buffer;
res := KOSAPI.sysfunc22(70, sys.ADR(F^), res2);
IF res2 > 0 THEN
F.pos := F.pos + res2
END
ELSE
res2 := 0
END
RETURN res2
END Write;
PROCEDURE Create* (FName: ARRAY OF CHAR): FS;
VAR
F: FS;
res2: INTEGER;
BEGIN
NEW(F);
IF F # NIL THEN
F.subfunc := 2;
F.pos := 0;
F.hpos := 0;
F.bytes := 0;
F.buffer := 0;
COPY(FName, F.name);
IF KOSAPI.sysfunc22(70, sys.ADR(F^), res2) # 0 THEN
DISPOSE(F)
END
END
RETURN F
END Create;
PROCEDURE DirExists* (FName: ARRAY OF CHAR): BOOLEAN;
VAR
fd: rFD;
BEGIN
RETURN GetFileInfo(FName, fd) & (4 IN BITS(fd.attr))
END DirExists;
PROCEDURE CreateDir* (DirName: ARRAY OF CHAR): BOOLEAN;
VAR
F: FS;
res, res2: INTEGER;
BEGIN
NEW(F);
IF F # NIL THEN
F.subfunc := 9;
F.pos := 0;
F.hpos := 0;
F.bytes := 0;
F.buffer := 0;
COPY(DirName, F.name);
res := KOSAPI.sysfunc22(70, sys.ADR(F^), res2);
DISPOSE(F)
ELSE
res := -1
END
RETURN res = 0
END CreateDir;
PROCEDURE DeleteDir* (DirName: ARRAY OF CHAR): BOOLEAN;
VAR
F: FS;
res, res2: INTEGER;
BEGIN
IF DirExists(DirName) THEN
NEW(F);
IF F # NIL THEN
F.subfunc := 8;
F.pos := 0;
F.hpos := 0;
F.bytes := 0;
F.buffer := 0;
COPY(DirName, F.name);
res := KOSAPI.sysfunc22(70, sys.ADR(F^), res2);
DISPOSE(F)
ELSE
res := -1
END
ELSE
res := -1
END
RETURN res = 0
END DeleteDir;
END File.