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{
This file is part of the Free Component Library
XML utility routines.
Copyright (c) 2006 by Sergei Gorelkin, sergei_gorelkin@mail.ru
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 xmlutils;
interface
uses
SysUtils;
function IsXmlName(const Value: WideString; Xml11: Boolean = False): Boolean;
function IsXmlNames(const Value: WideString; Xml11: Boolean = False): Boolean;
function IsXmlNmToken(const Value: WideString; Xml11: Boolean = False): Boolean;
function IsXmlNmTokens(const Value: WideString; Xml11: Boolean = False): Boolean;
function IsValidXmlEncoding(const Value: WideString): Boolean;
function Xml11NamePages: PByteArray;
procedure NormalizeSpaces(var Value: WideString);
{$i names.inc}
implementation
var
Xml11Pg: PByteArray = nil;
function Xml11NamePages: PByteArray;
var
I: Integer;
p: PByteArray;
begin
if Xml11Pg = nil then
begin
GetMem(p, 512);
for I := 0 to 255 do
p^[I] := ord(Byte(I) in Xml11HighPages);
p^[0] := 2;
p^[3] := $2c;
p^[$20] := $2a;
p^[$21] := $2b;
p^[$2f] := $29;
p^[$30] := $2d;
p^[$fd] := $28;
Move(p^, p^[256], 256);
p^[$100] := $19;
p^[$103] := $2E;
p^[$120] := $2F;
Xml11Pg := p;
end;
Result := Xml11Pg;
end;
function IsXml11Char(const Value: WideString; var Index: Integer): Boolean;
begin
if (Value[Index] >= #$D800) and (Value[Index] <= #$DB7F) then
begin
Inc(Index);
Result := (Value[Index] >= #$DC00) and (Value[Index] <= #$DFFF);
end
else
Result := False;
end;
function IsXmlName(const Value: WideString; Xml11: Boolean): Boolean;
var
Pages: PByteArray;
I: Integer;
begin
Result := False;
if Xml11 then
Pages := Xml11NamePages
else
Pages := @NamePages;
I := 1;
if (Value = '') or not ((Byte(Value[I]) in NamingBitmap[Pages^[hi(Word(Value[I]))]]) or
(Xml11 and IsXml11Char(Value, I))) then
Exit;
Inc(I);
while I <= Length(Value) do
begin
if not ((Byte(Value[I]) in NamingBitmap[Pages^[$100+hi(Word(Value[I]))]]) or
(Xml11 and IsXml11Char(Value, I))) then
Exit;
Inc(I);
end;
Result := True;
end;
function IsXmlNames(const Value: WideString; Xml11: Boolean): Boolean;
var
Pages: PByteArray;
I: Integer;
Offset: Integer;
begin
if Xml11 then
Pages := Xml11NamePages
else
Pages := @NamePages;
Result := False;
if Value = '' then
Exit;
I := 1;
Offset := 0;
while I <= Length(Value) do
begin
if not ((Byte(Value[I]) in NamingBitmap[Pages^[Offset+hi(Word(Value[I]))]]) or
(Xml11 and IsXml11Char(Value, I))) then
begin
if (I = Length(Value)) or (Value[I] <> #32) then
Exit;
Offset := 0;
Inc(I);
Continue;
end;
Offset := $100;
Inc(I);
end;
Result := True;
end;
function IsXmlNmToken(const Value: WideString; Xml11: Boolean): Boolean;
var
I: Integer;
Pages: PByteArray;
begin
if Xml11 then
Pages := Xml11NamePages
else
Pages := @NamePages;
Result := False;
if Value = '' then
Exit;
I := 1;
while I <= Length(Value) do
begin
if not ((Byte(Value[I]) in NamingBitmap[Pages^[$100+hi(Word(Value[I]))]]) or
(Xml11 and IsXml11Char(Value, I))) then
Exit;
Inc(I);
end;
Result := True;
end;
function IsXmlNmTokens(const Value: WideString; Xml11: Boolean): Boolean;
var
I: Integer;
Pages: PByteArray;
begin
if Xml11 then
Pages := Xml11NamePages
else
Pages := @NamePages;
I := 1;
Result := False;
if Value = '' then
Exit;
while I <= Length(Value) do
begin
if not ((Byte(Value[I]) in NamingBitmap[Pages^[$100+hi(Word(Value[I]))]]) or
(Xml11 and IsXml11Char(Value, I))) then
begin
if (I = Length(Value)) or (Value[I] <> #32) then
Exit;
end;
Inc(I);
end;
Result := True;
end;
function IsValidXmlEncoding(const Value: WideString): Boolean;
var
I: Integer;
begin
Result := False;
if (Value = '') or (Value[1] > #255) or not (char(Value[1]) in ['A'..'Z', 'a'..'z']) then
Exit;
for I := 2 to Length(Value) do
if (Value[I] > #255) or not (char(Value[I]) in ['A'..'Z', 'a'..'z', '0'..'9', '.', '_', '-']) then
Exit;
Result := True;
end;
procedure NormalizeSpaces(var Value: WideString);
var
I, J: Integer;
begin
I := Length(Value);
// speed: trim only whed needed
if (I > 0) and ((Value[1] = #32) or (Value[I] = #32)) then
Value := Trim(Value);
I := 1;
while I < Length(Value) do
begin
if Value[I] = #32 then
begin
J := I+1;
while (J <= Length(Value)) and (Value[J] = #32) do Inc(J);
if J-I > 1 then Delete(Value, I+1, J-I-1);
end;
Inc(I);
end;
end;
initialization
finalization
if Assigned(Xml11Pg) then
FreeMem(Xml11Pg);
end.
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