Оправдано ли для вас использование индексации массивов не с нуля? Зачастую индексация ваших массивов начинается с нуля или же с других значений?
Еще как оправдана, например при конверсии символов.
- Код: Выделить всё
{ MSEgui Copyright (c) 2007 by IvankoB
See the file COPYING.MSE, 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 mseucs2toru;
{$ifdef FPC}{$mode objfpc}{$h+}{$endif}
interface
uses
msestrings;
function ucs2to866(const avalue: msechar): char;
function ucs2to866(const avalue: msestring): ansistring;
function cp866toUCS2(const avalue: char): msechar;
function cp866toUCS2(const avalue: ansistring): msestring;
implementation
const
cp866_2: array[$2550..$256C] of byte = (
$cd,$ba,$d5,$d6,$c9,$b8,$b7,$bb,$d4,$d3,$c8,$be,$bd,$bc,$c6,
$c7,$cc,$b5,$b6,$b9,$d1,$d2,$cb,$cf,$d0,$ca,$d8,$d7,$ce
);
cpUCS2_1: array[$b5..$be] of longword = (
$2561,$2562,$2556,$2555,$2563,$2551,$2557,$255D,$255C,$255B
);
cpUCS2_2: array[$c6..$d8] of longword = (
$255E,$255F,$255A,$2554,$2569,$2566,$2560,$2550,$256C,$2567,
$2568,$2564,$2565,$2559,$2558,$2552,$2553,$256B,$256A
);
function ucs2to866(const avalue: msechar): char;
var
i: longword;
begin
i:= longword(avalue);
case i of
$0..$7f: result:= char(avalue);
$A0: result:= char($ff);
$A4: result:= char($fd);
$B0,$BA: result:= char($f8);
$B7: result:= char($fa);
$401: result:= char($f0);
$404: result:= char($f2);
$407: result:= char($f4);
$40E: result:= char($f6);
$410..$43f: result:= char(i-$390);
$440..$44f: result:= char(i-$360);
$451: result:= char($f1);
$454: result:= char($f3);
$457: result:= char($f5);
$45E: result:= char($f7);
$2116: result:= char($fc);
$2219: result:= char($f9);
$221A: result:= char($fb);
$2500: result:= char($c4);
$2502: result:= char($b3);
$250C: result:= char($da);
$2510: result:= char($bf);
$2514: result:= char($c0);
$2518: result:= char($d9);
$251C: result:= char($c3);
$2524: result:= char($b4);
$252C: result:= char($c2);
$2534: result:= char($c1);
$253C: result:= char($c5);
$2550..$256C: result:= char(cp866_2[i]);
$2580: result:= char($df);
$2584: result:= char($dc);
$2588: result:= char($db);
$258C: result:= char($dd);
$2590: result:= char($de);
$2591: result:= char($b0);
$2592: result:= char($b1);
$2593: result:= char($b2);
$25A0: result:= char($fe);
else
result:= char($20);
end;
end;
function ucs2to866(const avalue: msestring): ansistring;
var
i,i1: integer;
begin
i1:= length(avalue);
setlength(result,i1);
for i:= 1 to i1 do begin
result[i]:= ucs2to866(avalue[i]);
end;
end;
function cp866toUCS2(const avalue: char): msechar;
var
i: byte;
begin
i:= byte(avalue);
case i of
$0..$7f: result:= widechar(avalue);
$80..$af: result:= widechar(i + $390);
$b0: result:= widechar($2591);
$b1: result:= widechar($2592);
$b2: result:= widechar($2593);
$b3: result:= widechar($2502);
$b4: result:= widechar($2524);
$b5..$be: result:= widechar(cpUCS2_1[i]);
$bf: result:= widechar($2510);
$c0: result:= widechar($2514);
$c1: result:= widechar($2534);
$c2: result:= widechar($252C);
$c3: result:= widechar($251C);
$c4: result:= widechar($2500);
$c5: result:= widechar($253C);
$c6..$d8: result:= widechar(cpUCS2_2[i]);
$d9: result:= widechar($2518);
$da: result:= widechar($250C);
$db: result:= widechar($2588);
$dc: result:= widechar($2584);
$dd: result:= widechar($258C);
$de: result:= widechar($2590);
$df: result:= widechar($2580);
$e0..$ef: result:= widechar(i + $360);
$f0: result:= widechar($401);
$f1: result:= widechar($451);
$f2: result:= widechar($404);
$f3: result:= widechar($454);
$f4: result:= widechar($407);
$f5: result:= widechar($457);
$f6: result:= widechar($40E);
$f7: result:= widechar($45E);
$f8: result:= widechar($B0);
$f9: result:= widechar($2219);
$fa: result:= widechar($b7);
$fb: result:= widechar($221A);
$fc: result:= widechar($2116);
$fd: result:= widechar($a4);
$fe: result:= widechar($25A0);
$ff: result:= widechar($a0);
else
result:= widechar($20);
end;
end;
function cp866toUCS2(const avalue: ansistring): msestring;
var
i,i1: integer;
begin
i1:= length(avalue);
setlength(result,i1);
for i:= 1 to i1 do begin
result[i]:= cp866toUCS2(avalue[i]);
end;
end;
end.