2个不错的通配符比较函数(2)

2008-04-09 04:24:43来源:互联网 阅读 ()

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begin
if (aPattern[1] = ''''-'''') then
begin
//Match char exclusion range.
if (aSource[0] >= aPattern[0]) and (aSource[0] <= aPattern[2]) then
begin
//Given char failed set exclusion range.
Result := False;
Break;
end else
Inc(aPattern, 3);
end else
begin
//Match individual char exclusion.
if (aSource[0] = aPattern[0]) then
begin
//Given char failed set element exclusion.
Result := False;
Break;
end else
Inc(aPattern);
end;
end;
end else
begin
//Match for inclusion of given set...
Inc(aPattern);
Result := False;
while (aPattern[0] <> '''']'''') do
begin
if (aPattern[1] = ''''-'''') then
begin
//Match char inclusion range.
if (aSource[0] >= aPattern[0]) and (aSource[0] <= aPattern[2]) then
begin
//Given char matched set range inclusion.
// Continue testing...
Result := True;
Break;
end else
Inc(aPattern, 3);
end else
begin
//Match individual char inclusion.
if (aSource[0] = aPattern[0]) then
begin
//Given char matched set element inclusion.
// Continue testing...
Result := True;
Break;
end else
Inc(aPattern);
end;
end;
end;

if (Result) then
begin
//Match was found. Continue further.
Inc(aSource);
//Position Pattern to char after "]"
while (aPattern[0] <> '''']'''') and (aPattern[0] <> #0) do Inc(aPattern);
if (aPattern[0] = #0) then
begin
//Invalid Pattern - missing "]"
Result := False;
Exit;
end else
Inc(aPattern);
end else
Exit;
end;

else begin //Match given single char.
if (aSource[0] <> aPattern[0]) then
begin
Result := False;
Break;
end;

//Continue testing next char...
Inc(aSource);
Inc(aPattern);
end;
end;
end;
end;

function MatchPattern(const aPattern, aSource: string): Boolean;
begin
Result := _MatchPattern(PChar(aPattern), PChar(aSource));
end;

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