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fpc/rtl/os2/dos.pas
Tomas Hajny 3e26fef459 * GetEnv rewritten to assembly - 3x faster now
2002-03-03 11:19:20 +00:00

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{****************************************************************************
$Id$
Free Pascal Runtime-Library
DOS unit for OS/2
Copyright (c) 1997,1999-2000 by Daniel Mantione,
member of the Free Pascal development team
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
****************************************************************************}
unit dos;
{$ASMMODE ATT}
{***************************************************************************}
interface
{***************************************************************************}
{$PACKRECORDS 1}
uses Strings, DosCalls;
const {Bit masks for CPU flags.}
fcarry = $0001;
fparity = $0004;
fauxiliary = $0010;
fzero = $0040;
fsign = $0080;
foverflow = $0800;
{Bit masks for file attributes.}
readonly = $01;
hidden = $02;
sysfile = $04;
volumeid = $08;
directory = $10;
archive = $20;
anyfile = $3F;
fmclosed = $D7B0;
fminput = $D7B1;
fmoutput = $D7B2;
fminout = $D7B3;
type {Some string types:}
comstr=string; {Filenames can be long in OS/2.}
pathstr=string; {String for pathnames.}
dirstr=string; {String for a directory}
namestr=string; {String for a filename.}
extstr=string[40]; {String for an extension. Can be 253
characters long, in theory, but let's
say fourty will be enough.}
{Search record which is used by findfirst and findnext:}
searchrec=record
case boolean of
false: (handle:longint; {Used in os_OS2 mode}
FStat:PFileFindBuf3;
fill2:array[1..21-SizeOf(longint)-SizeOf(pointer)] of byte;
attr2:byte;
time2:longint;
size2:longint;
name2:string); {Filenames can be long in OS/2!}
true: (fill:array[1..21] of byte;
attr:byte;
time:longint;
size:longint;
name:string); {Filenames can be long in OS/2!}
end;
{$i filerec.inc}
{$i textrec.inc}
{Data structure for the registers needed by msdos and intr:}
registers=packed record
case i:integer of
0:(ax,f1,bx,f2,cx,f3,dx,f4,bp,f5,si,f51,di,f6,ds,f7,es,
f8,flags,fs,gs:word);
1:(al,ah,f9,f10,bl,bh,f11,f12,cl,ch,f13,f14,dl,dh:byte);
2:(eax,ebx,ecx,edx,ebp,esi,edi:longint);
end;
{Record for date and time:}
datetime=record
year,month,day,hour,min,sec:word;
end;
{Flags for the exec procedure:
Starting the program:
efwait: Wait until program terminates.
efno_wait: Don't wait until the program terminates. Does not work
in dos, as DOS cannot multitask.
efoverlay: Terminate this program, then execute the requested
program. WARNING: Exit-procedures are not called!
efdebug: Debug program. Details are unknown.
efsession: Do not execute as child of this program. Use a seperate
session instead.
efdetach: Detached. Function unknown. Info wanted!
efpm: Run as presentation manager program.
Determining the window state of the program:
efdefault: Run the pm program in it's default situation.
efminimize: Run the pm program minimized.
efmaximize: Run the pm program maximized.
effullscreen: Run the non-pm program fullscreen.
efwindowed: Run the non-pm program in a window.
Other options are not implemented defined because lack of
knowledge about what they do.}
type execrunflags=(efwait,efno_wait,efoverlay,efdebug,efsession,
efdetach,efpm);
execwinflags=(efdefault,efminimize,efmaximize,effullscreen,
efwindowed);
const
(* For compatibility with VP/2, used for runflags in Exec procedure. *)
ExecFlags: cardinal = ord (efwait);
var doserror:integer;
dosexitcode:word;
procedure getdate(var year,month,day,dayofweek:word);
procedure gettime(var hour,minute,second,sec100:word);
function dosversion:word;
procedure setdate(year,month,day:word);
procedure settime(hour,minute,second,sec100:word);
procedure getcbreak(var breakvalue:boolean);
procedure setcbreak(breakvalue:boolean);
procedure getverify(var verify:boolean);
procedure setverify(verify : boolean);
function DiskFree (Drive: byte) : int64;
function DiskSize (Drive: byte) : int64;
procedure findfirst(const path:pathstr;attr:word;var f:searchRec);
procedure findnext(var f:searchRec);
procedure findclose(var f:searchRec);
{Is a dummy:}
procedure swapvectors;
{Not supported:
procedure getintvec(intno:byte;var vector:pointer);
procedure setintvec(intno:byte;vector:pointer);
procedure keep(exitcode:word);
}
procedure msdos(var regs:registers);
procedure intr(intno : byte;var regs:registers);
procedure getfattr(var f;var attr:word);
procedure setfattr(var f;attr:word);
function fsearch(path:pathstr;dirlist:string):pathstr;
procedure getftime(var f;var time:longint);
procedure setftime(var f;time:longint);
procedure packtime (var d:datetime; var time:longint);
procedure unpacktime (time:longint; var d:datetime);
function fexpand(const path:pathstr):pathstr;
procedure fsplit(path:pathstr;var dir:dirstr;var name:namestr;
var ext:extstr);
procedure exec(const path:pathstr;const comline:comstr);
function exec(path:pathstr;runflags:execrunflags;winflags:execwinflags;
const comline:comstr):longint;
function envcount:longint;
function envstr(index:longint) : string;
function getenv(const envvar:string): string;
implementation
var LastSR: SearchRec;
EnvC: longint; external name '_envc';
EnvP: ppchar; external name '_environ';
type TBA = array [1..SizeOf (SearchRec)] of byte;
PBA = ^TBA;
{Import syscall to call it nicely from assembler procedures.}
procedure syscall;external name '___SYSCALL';
function fsearch(path:pathstr;dirlist:string):pathstr;
var i,p1:longint;
newdir:pathstr;
{$ASMMODE INTEL}
function CheckFile (FN: ShortString):boolean; assembler;
asm
mov ax, 4300h
mov edx, FN { get pointer to string }
inc edx { avoid length byte }
call syscall
mov ax, 0
jc @LCFstop
test cx, 18h
jnz @LCFstop
inc ax
@LCFstop:
end;
{$ASMMODE ATT}
begin
{ check if the file specified exists }
if CheckFile (Path + #0) then
FSearch := Path
else
begin
{No wildcards allowed in these things:}
if (pos('?',path)<>0) or (pos('*',path)<>0) then
fsearch:=''
else
begin
{ allow slash as backslash }
for i:=1 to length(dirlist) do
if dirlist[i]='/' then dirlist[i]:='\';
repeat
p1:=pos(';',dirlist);
if p1<>0 then
begin
newdir:=copy(dirlist,1,p1-1);
delete(dirlist,1,p1);
end
else
begin
newdir:=dirlist;
dirlist:='';
end;
if (newdir<>'') and
not (newdir[length(newdir)] in ['\',':']) then
newdir:=newdir+'\';
if CheckFile (NewDir + Path + #0) then
NewDir := NewDir + Path
else
NewDir := '';
until (DirList = '') or (NewDir <> '');
FSearch := NewDir;
end;
end;
end;
procedure getftime(var f;var time:longint);
begin
asm
{Load handle}
movl f,%ebx
movl (%ebx),%ebx
{Get date}
movw $0x5700,%ax
call syscall
shll $16,%edx
movw %cx,%dx
movl time,%ebx
movl %edx,(%ebx)
xorb %ah,%ah
movw %ax,doserror
end;
end;
procedure SetFTime (var F; Time: longint);
var FStat: PFileStatus3;
RC: longint;
begin
if os_mode = osOS2 then
begin
New (FStat);
RC := DosQueryFileInfo (FileRec (F).Handle, ilStandard, FStat,
SizeOf (FStat^));
if RC = 0 then
begin
FStat^.DateLastAccess := Hi (Time);
FStat^.DateLastWrite := Hi (Time);
FStat^.TimeLastAccess := Lo (Time);
FStat^.TimeLastWrite := Lo (Time);
RC := DosSetFileInfo (FileRec (F).Handle, ilStandard,
FStat, SizeOf (FStat^));
end;
DosError := integer(RC);
Dispose (FStat);
end
else
asm
{Load handle}
movl f,%ebx
movl (%ebx),%ebx
movl time,%ecx
shldl $16,%ecx,%edx
{Set date}
movw $0x5701,%ax
call syscall
xorb %ah,%ah
movw %ax,doserror
end;
end;
procedure msdos(var regs:registers);
{Not recommended for EMX. Only works in DOS mode, not in OS/2 mode.}
begin
if os_mode in [osDPMI,osDOS] then
intr($21,regs);
end;
procedure intr(intno:byte;var regs:registers);
{Not recommended for EMX. Only works in DOS mode, not in OS/2 mode.}
begin
if os_mode = osos2 then exit;
asm
jmp .Lstart
{ .data}
.Lint86:
.byte 0xcd
.Lint86_vec:
.byte 0x03
jmp .Lint86_retjmp
{ .text}
.Lstart:
movb intno,%al
movb %al,.Lint86_vec
{
movl 10(%ebp),%eax
incl %eax
incl %eax
}
movl regs,%eax
{Do not use first int}
movl 4(%eax),%ebx
movl 8(%eax),%ecx
movl 12(%eax),%edx
movl 16(%eax),%ebp
movl 20(%eax),%esi
movl 24(%eax),%edi
movl (%eax),%eax
jmp .Lint86
.Lint86_retjmp:
pushf
pushl %ebp
pushl %eax
movl %esp,%ebp
{Calc EBP new}
addl $12,%ebp
{
movl 10(%ebp),%eax
incl %eax
incl %eax
}
{Do not use first int}
movl regs,%eax
popl (%eax)
movl %ebx,4(%eax)
movl %ecx,8(%eax)
movl %edx,12(%eax)
{Restore EBP}
popl %edx
movl %edx,16(%eax)
movl %esi,20(%eax)
movl %edi,24(%eax)
{Ignore ES and DS}
popl %ebx {Flags.}
movl %ebx,32(%eax)
{FS and GS too}
end;
end;
procedure exec(const path:pathstr;const comline:comstr);
{Execute a program.}
begin
dosexitcode:=word(exec(path,execrunflags(ExecFlags),efdefault,comline));
end;
function exec(path:pathstr;runflags:execrunflags;winflags:execwinflags;
const comline:comstr):longint;
{Execute a program. More suitable for OS/2 than the exec above.}
{512 bytes should be enough to contain the command-line.}
type bytearray=array[0..8191] of byte;
Pbytearray=^bytearray;
execstruc=packed record
argofs : pointer; { pointer to arguments (offset) }
envofs : pointer; { pointer to environment (offset) }
nameofs: pointer; { pointer to file name (offset) }
argseg : word; { pointer to arguments (selector) }
envseg : word; { pointer to environment (selector}
nameseg: word; { pointer to file name (selector) }
numarg : word; { number of arguments }
sizearg : word; { size of arguments }
numenv : word; { number of env strings }
sizeenv:word; { size of environment }
mode1,mode2:byte; { mode byte }
end;
var args:Pbytearray;
env:Pbytearray;
i,argsize:word;
es:execstruc;
esadr:pointer;
d:dirstr;
n:namestr;
e:extstr;
p : ppchar;
j : integer;
begin
getmem(args,512);
GetMem(env, envc*sizeof(pchar)+16384);
{Now setup the arguments. The first argument should be the program
name without directory and extension.}
fsplit(path,d,n,e);
es.numarg:=1;
args^[0]:=$80;
argsize:=1;
for i:=1 to length(n) do
begin
args^[argsize]:=byte(n[i]);
inc(argsize);
end;
args^[argsize]:=0;
inc(argsize);
{Now do the real arguments.}
i:=1;
while i<=length(comline) do
begin
if comline[i]<>' ' then
begin
{Commandline argument found. Copy it.}
inc(es.numarg);
args^[argsize]:=$80;
inc(argsize);
while (i<=length(comline)) and (comline[i]<>' ') do
begin
args^[argsize]:=byte(comline[i]);
inc(argsize);
inc(i);
end;
args^[argsize]:=0;
inc(argsize);
end;
inc(i);
end;
args^[argsize]:=0;
inc(argsize);
{Commandline ready, now build the environment.
Oh boy, I always had the opinion that executing a program under Dos
was a hard job!}
asm
movl env,%edi {Setup destination pointer.}
movl envc,%ecx {Load number of arguments in edx.}
movl envp,%esi {Load env. strings.}
xorl %edx,%edx {Count environment size.}
.Lexa1:
lodsl {Load a Pchar.}
xchgl %eax,%ebx
.Lexa2:
movb (%ebx),%al {Load a byte.}
incl %ebx {Point to next byte.}
stosb {Store it.}
incl %edx {Increase counter.}
cmpb $0,%al {Ready ?.}
jne .Lexa2
loop .Lexa1 {Next argument.}
stosb {Store an extra 0 to finish. (AL is now 0).}
incl %edx
movw %dx,ES.SizeEnv {Store environment size.}
end;
{Environment ready, now set-up exec structure.}
es.argofs:=args;
es.envofs:=env;
es.numenv:=envc;
{ set an error - path is too long }
{ since we must add a zero to the }
{ end. }
if length(path) > 254 then
begin
exec := 8;
exit;
end;
path[length(path)+1] := #0;
es.nameofs:=pointer(longint(@path)+1);
asm
movw %ss,es.argseg
movw %ss,es.envseg
movw %ss,es.nameseg
end;
es.sizearg:=argsize;
{Typecasting of sets in FPC is a bit hard.}
es.mode1:=byte(runflags);
es.mode2:=byte(winflags);
{Now exec the program.}
asm
leal es,%edx
movw $0x7f06,%ax
call syscall
movl $0,%edi
jnc .Lexprg1
xchgl %eax,%edi
xorl %eax,%eax
decl %eax
.Lexprg1:
movw %di,doserror
movl %eax,__RESULT
end;
freemem(args,512);
FreeMem(env, envc*sizeof(pchar)+16384);
{Phew! That's it. This was the most sophisticated procedure to call
a system function I ever wrote!}
end;
function dosversion:word;assembler;
{Returns DOS version in DOS and OS/2 version in OS/2}
asm
movb $0x30,%ah
call syscall
end;
procedure GetDate (var Year, Month, Day, DayOfWeek: word);
begin
asm
movb $0x2a, %ah
call syscall
xorb %ah, %ah
movl DayOfWeek, %edi
stosw
movl Day, %edi
movb %dl, %al
stosw
movl Month, %edi
movb %dh, %al
stosw
movl Year, %edi
xchgw %ecx, %eax
stosw
end;
end;
{$asmmode intel}
procedure SetDate (Year, Month, Day: word);
var DT: TDateTime;
begin
if os_mode = osOS2 then
begin
DosGetDateTime (DT);
DT.Year := Year;
DT.Month := byte (Month);
DT.Day := byte (Day);
DosSetDateTime (DT);
end
else
asm
mov cx, Year
mov dh, byte ptr Month
mov dl, byte ptr Day
mov ah, 2Bh
call syscall
end;
end;
{$asmmode att}
procedure GetTime (var Hour, Minute, Second, Sec100: word); assembler;
asm
movb $0x2c, %ah
call syscall
xorb %ah, %ah
movl Sec100, %edi
movb %dl, %al
stosw
movl Second, %edi
movb %dh,%al
stosw
movl Minute, %edi
movb %cl,%al
stosw
movl Hour, %edi
movb %ch,%al
stosw
end;
{$asmmode intel}
procedure SetTime (Hour, Minute, Second, Sec100: word);
var DT: TDateTime;
begin
if os_mode = osOS2 then
begin
DosGetDateTime (DT);
DT.Hour := byte (Hour);
DT.Minute := byte (Minute);
DT.Second := byte (Second);
DT.Sec100 := byte (Sec100);
DosSetDateTime (DT);
end
else
asm
mov ch, byte ptr Hour
mov cl, byte ptr Minute
mov dh, byte ptr Second
mov dl, byte ptr Sec100
mov ah, 2Dh
call syscall
end;
end;
{$asmmode att}
procedure getcbreak(var breakvalue:boolean);
begin
breakvalue := True;
end;
procedure setcbreak(breakvalue:boolean);
begin
{! Do not use in OS/2. Also not recommended in DOS. Use
signal handling instead.
asm
movb 8(%ebp),%dl
movw $0x3301,%ax
call syscall
end;
}
end;
procedure getverify(var verify:boolean);
begin
{! Do not use in OS/2.}
if os_mode in [osDOS,osDPMI] then
asm
movb $0x54,%ah
call syscall
movl verify,%edi
stosb
end
else
verify := true;
end;
procedure setverify(verify:boolean);
begin
{! Do not use in OS/2!}
if os_mode in [osDOS,osDPMI] then
asm
movb verify,%al
movb $0x2e,%ah
call syscall
end;
end;
function DiskFree (Drive: byte): int64;
var FI: TFSinfo;
RC: longint;
begin
if (os_mode = osDOS) or (os_mode = osDPMI) then
{Function 36 is not supported in OS/2.}
asm
movb Drive,%dl
movb $0x36,%ah
call syscall
cmpw $-1,%ax
je .LDISKFREE1
mulw %cx
mulw %bx
shll $16,%edx
movw %ax,%dx
movl $0,%eax
xchgl %edx,%eax
leave
ret
.LDISKFREE1:
cltd
leave
ret
end
else
{In OS/2, we use the filesystem information.}
begin
RC := DosQueryFSInfo (Drive, 1, FI, SizeOf (FI));
if RC = 0 then
DiskFree := int64 (FI.Free_Clusters) *
int64 (FI.Sectors_Per_Cluster) * int64 (FI.Bytes_Per_Sector)
else
DiskFree := -1;
end;
end;
function DiskSize (Drive: byte): int64;
var FI: TFSinfo;
RC: longint;
begin
if (os_mode = osDOS) or (os_mode = osDPMI) then
{Function 36 is not supported in OS/2.}
asm
movb Drive,%dl
movb $0x36,%ah
call syscall
movw %dx,%bx
cmpw $-1,%ax
je .LDISKSIZE1
mulw %cx
mulw %bx
shll $16,%edx
movw %ax,%dx
movl $0,%eax
xchgl %edx,%eax
leave
ret
.LDISKSIZE1:
cltd
leave
ret
end
else
{In OS/2, we use the filesystem information.}
begin
RC := DosQueryFSinfo (Drive, 1, FI, SizeOf (FI));
if RC = 0 then
DiskSize := int64 (FI.Total_Clusters) *
int64 (FI.Sectors_Per_Cluster) * int64 (FI.Bytes_Per_Sector)
else
DiskSize := -1;
end;
end;
procedure SearchRec2DosSearchRec (var F: SearchRec);
const NameSize = 255;
var L, I: longint;
begin
if os_mode <> osOS2 then
begin
I := 1;
while (I <= SizeOf (LastSR))
and (PBA (@F)^ [I] = PBA (@LastSR)^ [I]) do Inc (I);
{ Raise "Invalid file handle" RTE if nested FindFirst calls were used. }
if I <= SizeOf (LastSR) then RunError (6);
l:=length(f.name);
for i:=1 to namesize do
f.name[i-1]:=f.name[i];
f.name[l]:=#0;
end;
end;
procedure DosSearchRec2SearchRec (var F: SearchRec);
const NameSize=255;
var L, I: longint;
type TRec = record
T, D: word;
end;
begin
if os_mode = osOS2 then with F do
begin
Name := FStat^.Name;
Size := FStat^.FileSize;
Attr := byte(FStat^.AttrFile and $FF);
TRec (Time).T := FStat^.TimeLastWrite;
TRec (Time).D := FStat^.DateLastWrite;
end else
begin
for i:=0 to namesize do
if f.name[i]=#0 then
begin
l:=i;
break;
end;
for i:=namesize-1 downto 0 do
f.name[i+1]:=f.name[i];
f.name[0]:=char(l);
Move (F, LastSR, SizeOf (LastSR));
end;
end;
procedure _findfirst(path:pchar;attr:word;var f:searchrec);
begin
asm
movl path,%edx
movw attr,%cx
{No need to set DTA in EMX. Just give a pointer in ESI.}
movl f,%esi
movb $0x4e,%ah
call syscall
jnc .LFF
movw %ax,doserror
.LFF:
end;
end;
procedure FindFirst (const Path: PathStr; Attr: word; var F: SearchRec);
var path0: array[0..255] of char;
Count: longint;
begin
{No error.}
DosError := 0;
if os_mode = osOS2 then
begin
New (F.FStat);
F.Handle := $FFFFFFFF;
Count := 1;
DosError := Integer(DosFindFirst (Path, F.Handle, Attr, F.FStat,
SizeOf (F.FStat^), Count, ilStandard));
if (DosError = 0) and (Count = 0) then DosError := 18;
end else
begin
strPcopy(path0,path);
_findfirst(path0,attr,f);
end;
DosSearchRec2SearchRec (F);
end;
procedure _findnext(var f : searchrec);
begin
asm
movl f,%esi
movb $0x4f,%ah
call syscall
jnc .LFN
movw %ax,doserror
.LFN:
end;
end;
procedure FindNext (var F: SearchRec);
var Count: longint;
begin
{No error}
DosError := 0;
SearchRec2DosSearchRec (F);
if os_mode = osOS2 then
begin
Count := 1;
DosError := Integer(DosFindNext (F.Handle, F.FStat, SizeOf (F.FStat^), Count));
if (DosError = 0) and (Count = 0) then DosError := 18;
end else _findnext (F);
DosSearchRec2SearchRec (F);
end;
procedure FindClose (var F: SearchRec);
begin
if os_mode = osOS2 then
begin
if F.Handle <> $FFFFFFFF then DosError := DosFindClose (F.Handle);
Dispose (F.FStat);
end;
end;
procedure swapvectors;
{For TP compatibility, this exists.}
begin
end;
function GetEnv (const EnvVar: string): string;
(* The assembler version is more than three times as fast as Pascal. *)
var
P: PChar;
_EnvVar: string;
begin
_EnvVar := UpCase (EnvVar);
{$ASMMODE INTEL}
asm
cld
mov ecx, EnvC
mov edi, EnvP
mov edi, [edi]
lea esi, _EnvVar
xor eax, eax
lodsb
@NewVar:
push ecx
push eax
push esi
mov ecx, -1
mov edx, edi
mov al, '='
repne
scasb
neg ecx
dec ecx
dec ecx
pop esi
pop eax
push eax
push esi
cmp ecx, eax
jnz @NotEqual
xchg edx, edi
repe
cmpsb
xchg edx, edi
jz @Equal
@NotEqual:
xor eax, eax
mov ecx, -1
repne
scasb
pop esi
pop eax
pop ecx
dec ecx
jecxz @Stop
jmp @NewVar
@Stop:
mov P, ecx
jmp @End
@Equal:
pop esi
pop eax
pop ecx
mov P, edi
@End:
end;
GetEnv := StrPas (P);
end;
{$ASMMODE ATT}
procedure fsplit(path:pathstr;var dir:dirstr;var name:namestr;
var ext:extstr);
var p1,i : longint;
dotpos : integer;
begin
{ allow slash as backslash }
for i:=1 to length(path) do
if path[i]='/' then path[i]:='\';
{Get drive name}
p1:=pos(':',path);
if p1>0 then
begin
dir:=path[1]+':';
delete(path,1,p1);
end
else
dir:='';
{ split the path and the name, there are no more path informtions }
{ if path contains no backslashes }
while true do
begin
p1:=pos('\',path);
if p1=0 then
break;
dir:=dir+copy(path,1,p1);
delete(path,1,p1);
end;
{ try to find out a extension }
Ext:='';
i:=Length(Path);
DotPos:=256;
While (i>0) Do
Begin
If (Path[i]='.') Then
begin
DotPos:=i;
break;
end;
Dec(i);
end;
Ext:=Copy(Path,DotPos,255);
Name:=Copy(Path,1,DotPos - 1);
end;
(*
function FExpand (const Path: PathStr): PathStr;
- declared in fexpand.inc
*)
{$DEFINE FPC_FEXPAND_UNC} (* UNC paths are supported *)
{$DEFINE FPC_FEXPAND_DRIVES} (* Full paths begin with drive specification *)
const
LFNSupport = true;
{$I fexpand.inc}
{$UNDEF FPC_FEXPAND_DRIVES}
{$UNDEF FPC_FEXPAND_UNC}
procedure packtime(var d:datetime;var time:longint);
var zs:longint;
begin
time:=-1980;
time:=time+d.year and 127;
time:=time shl 4;
time:=time+d.month;
time:=time shl 5;
time:=time+d.day;
time:=time shl 16;
zs:=d.hour;
zs:=zs shl 6;
zs:=zs+d.min;
zs:=zs shl 5;
zs:=zs+d.sec div 2;
time:=time+(zs and $ffff);
end;
procedure unpacktime (time:longint;var d:datetime);
begin
d.sec:=(time and 31) * 2;
time:=time shr 5;
d.min:=time and 63;
time:=time shr 6;
d.hour:=time and 31;
time:=time shr 5;
d.day:=time and 31;
time:=time shr 5;
d.month:=time and 15;
time:=time shr 4;
d.year:=time+1980;
end;
procedure getfattr(var f;var attr : word);
{ Under EMX, this routine requires }
{ the expanded path specification }
{ otherwise it will not function }
{ properly (CEC) }
var
path: pathstr;
buffer:array[0..255] of char;
begin
DosError := 0;
path:='';
path := StrPas(filerec(f).Name);
{ Takes care of slash and backslash support }
path:=FExpand(path);
move(path[1],buffer,length(path));
buffer[length(path)]:=#0;
asm
movw $0x4300,%ax
leal buffer,%edx
call syscall
jnc .Lnoerror { is there an error ? }
movw %ax,doserror
.Lnoerror:
movl attr,%ebx
movw %cx,(%ebx)
end;
end;
procedure setfattr(var f;attr : word);
{ Under EMX, this routine requires }
{ the expanded path specification }
{ otherwise it will not function }
{ properly (CEC) }
var
path: pathstr;
buffer:array[0..255] of char;
begin
path:='';
DosError := 0;
path := StrPas(filerec(f).Name);
{ Takes care of slash and backslash support }
path:=FExPand(path);
move(path[1],buffer,length(path));
buffer[length(path)]:=#0;
asm
movw $0x4301,%ax
leal buffer,%edx
movw attr,%cx
call syscall
jnc .Lnoerror
movw %ax,doserror
.Lnoerror:
end;
end;
procedure InitEnvironment;
var
cnt : integer;
ptr : pchar;
base : pchar;
i: integer;
tib : pprocessinfoblock;
begin
{ We need to setup the environment }
{ only in the case of OS/2 }
{ otherwise everything is in the stack }
if os_Mode in [OsDOS,osDPMI] then
exit;
cnt := 0;
{ count number of environment pointers }
dosgetinfoblocks(nil,@tib);
ptr := pchar(tib^.env);
{ stringz,stringz...,#0 }
i := 0;
repeat
repeat
(inc(i));
until (ptr[i] = #0);
inc(i);
{ here, it may be a double null, end of environment }
if ptr[i] <> #0 then
inc(cnt);
until (ptr[i] = #0);
{ save environment count }
envc := cnt;
{ got count of environment strings }
GetMem(envp, cnt*sizeof(pchar)+16384);
cnt := 0;
ptr := pchar(tib^.env);
i:=0;
repeat
envp[cnt] := ptr;
Inc(cnt);
{ go to next string ... }
repeat
inc(ptr);
until (ptr^ = #0);
inc(ptr);
until ptr^ = #0;
envp[cnt] := #0;
end;
procedure DoneEnvironment;
begin
{ it is allocated on the stack for DOS/DPMI }
if os_mode = osOs2 then
FreeMem(envp, envc*sizeof(pchar)+16384);
end;
var
oldexit : pointer;
begin
oldexit:=exitproc;
exitproc:=@doneenvironment;
InitEnvironment;
end.
{
$Log$
Revision 1.16 2002-03-03 11:19:20 hajny
* GetEnv rewritten to assembly - 3x faster now
Revision 1.15 2001/11/23 00:35:02 carl
* updated behavior of some routines to conform to docs (completely taken from fixes branch)
Revision 1.1.2.14 2001/11/23 00:33:17 carl
* updated behavior of some routines to conform to docs
Revision 1.1.2.13 2001/11/20 03:32:09 carl
* range check errors fixes
Revision 1.1.2.12 2001/10/05 01:36:18 carl
* corrected assembler syntax error
Revision 1.1.2.11 2001/06/06 01:30:04 carl
+ small modification from go32v2 LFN version (fsplit)
* now support / but returns always \ (as it should) (fsplit)
Revision 1.1.2.10 2001/05/21 20:51:43 hajny
* silly mistyping corrected
Revision 1.1.2.9 2001/05/20 18:55:12 hajny
* fix for Carl's Exec modification
Revision 1.1.2.8 2001/05/20 15:05:02 hajny
DiskSize/DiskFree EMX mode corrections
Revision 1.1.2.7 2001/05/14 19:22:53 carl
+ More DosError results
* GetFattr handle bug
* SetFTime handle bug
* Passing the environment in exec() now works
* Correct flags set with exec()
* Buffer overflow for setftime()
* Fixed a bug that i added with my last commit, environment pointers under OS/2 were not always setup correctly.
Revision 1.1.2.6 2001/05/12 03:11:39 carl
* fix of environment pointer under real OS/2
* fix problems with _findfirst() , _findnext() under plain DOS
- remove all syscalls which are either unsupported in OS/2 or untested in EMX
(some of them i did test myself, and they crashed under plain DOS)
Revision 1.1.2.5 2001/04/10 18:54:50 hajny
* better check for FindClose
Revision 1.1.2.4 2001/03/11 19:07:14 hajny
* merging FExpand and Find* fixes
Revision 1.1.2.3 2001/02/04 02:01:29 hajny
* direct asm removing, DosGetInfoBlocks change merged
Revision 1.1.2.2 2000/11/05 22:21:06 hajny
* more FExpand fixes
Revision 1.1.2.1 2000/10/28 16:59:50 hajny
* many FExpand fixes plus merging corrections made by Jonas in the main branch
Revision 1.1 2000/07/13 06:31:04 michael
+ Initial import
Revision 1.28 2000/07/06 18:57:40 hajny
* SetFTime for OS/2 mode corrected
Revision 1.27 2000/06/05 18:50:55 hajny
* SetDate, SetTime corrected
Revision 1.26 2000/06/01 18:38:46 hajny
* warning about SetDate added (TODO)
Revision 1.25 2000/05/28 18:20:16 hajny
* DiskFree/DiskSize updated
Revision 1.24 2000/05/21 16:06:38 hajny
+ FSearch and Find* reworked
Revision 1.23 2000/04/18 20:30:02 hajny
* FSearch with given path corrected
Revision 1.22 2000/03/12 18:32:17 hajny
* missing parentheses added
Revision 1.21 2000/03/05 19:00:37 hajny
* DiskFree, DiskSize - int64 result, fix for osDPMI mode
Revision 1.20 2000/02/09 16:59:33 peter
* truncated log
Revision 1.19 2000/01/09 20:51:03 hajny
* FPK changed to FPC
Revision 1.18 2000/01/07 16:41:45 daniel
* copyright 2000
Revision 1.17 1999/10/13 12:21:56 daniel
* OS/2 compiler works again.
Revision 1.16 1999/09/13 18:21:02 hajny
* again didn't manage to read docu for DosFindFirst properly :-(
Revision 1.15 1999/09/13 17:56:26 hajny
* another correction to FSearch fix - mistyping
Revision 1.14 1999/09/13 17:35:15 hajny
* little addition/correction to FSearch fix
Revision 1.13 1999/09/09 09:20:43 hajny
* FSearch under OS/2 fixed
}
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