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+ implemented ParamStr(0) on i8086-msdos, using our limited far pointer support

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git-svn-id: trunk@24573 -
This commit is contained in:
nickysn 2013-05-24 15:28:22 +00:00
parent 2c792659ce
commit 52328554e4
1 changed files with 44 additions and 1 deletions
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45
rtl/msdos/system.pp
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@ -122,6 +122,46 @@ end;
ParamStr/Randomize ParamStr/Randomize
*****************************************************************************} *****************************************************************************}
function GetProgramName: string;
type
PFarByte = ^Byte;far;
PFarWord = ^Word;far;
var
dos_env_seg: Word;
ofs: Word;
Ch, Ch2: Char;
begin
dos_env_seg := PFarWord(Ptr(dos_psp, $2C))^;
ofs := 1;
repeat
Ch := Chr(PFarByte(Ptr(dos_env_seg,ofs - 1))^);
Ch2 := Chr(PFarByte(Ptr(dos_env_seg,ofs))^);
if (Ch = #0) and (Ch2 = #0) then
begin
Inc(ofs, 3);
GetProgramName := '';
repeat
Ch := Chr(PFarByte(Ptr(dos_env_seg,ofs))^);
if Ch <> #0 then
GetProgramName := GetProgramName + Ch;
Inc(ofs);
if ofs = 0 then
begin
GetProgramName := '';
exit;
end;
until Ch = #0;
exit;
end;
Inc(ofs);
if ofs = 0 then
begin
GetProgramName := '';
exit;
end;
until false;
end;
function paramcount : longint; function paramcount : longint;
begin begin
paramcount := 0; paramcount := 0;
@ -130,7 +170,10 @@ end;
function paramstr(l : longint) : string; function paramstr(l : longint) : string;
begin begin
paramstr := ''; if l = 0 then
paramstr := GetProgramName
else
paramstr := '';
end; end;
procedure randomize; procedure randomize;