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|
unit Execute.FastXML;
// Quick & Dirty XML parser (c)2019 Execute SARL <contact@execute.fr>
interface
uses
System.SysUtils;
type
TFastXML = record
Text: string;
function LoadFromFile(const AFileName: string): Boolean;
function LoadSection(const AName: string): Boolean;
function GetSection(const AName: string; var AIndex: Integer; var Content: string): Boolean;
function GetString(const AName: string; ADefault: string = ''): string;
function GetInt(const AName: string; ADefault: Integer): Integer;
function GetBool(const AName: string; ADefault: Boolean): Boolean;
function GetAttribute(const ANode, AName: string): string;
end;
implementation
function TFastXML.LoadFromFile(const AFileName: string): Boolean;
var
Bytes: TBytes;
F : file;
Size : Integer;
begin
Text := '';
IoResult; // Clear IoREsult
AssignFile(F, AFileName);
try
Reset(F, 1);
if IoResult <> 0 then
Exit(False);
try
Size := FileSize(F);
if Size <= 0 then
Exit(False);
SetLength(Bytes, Size);
BlockRead(F, Bytes[0], Size);
finally
CloseFile(F);
end;
Text := TEncoding.UTF8.GetString(Bytes);
Result := True;
except
Result := False;
end;
end;
function TFastXML.LoadSection(const AName: string): Boolean;
var
Index: Integer;
Section: string;
begin
Index := 1;
Result := GetSection(AName, Index, Section);
if Result then
Text := Section
else
Text := '';
end;
function TFastXML.GetSection(const AName: string; var AIndex: Integer; var Content: string): Boolean;
var
Start, Stop, Opens, Closes, Index: Integer;
begin
Result := False;
Start := Pos('<' + AName, Text, AIndex);
if Start = 0 then
Exit;
Closes := 0;
Stop := Pos('>', Text, Start);
if Stop = 0 then
Exit;
if Text[Stop - 1] = '/' then
begin
Inc(Stop);
Content := Copy(Text, Start, Stop - Start);
end else begin
repeat
Stop := Pos('</' + AName + '>', Text, Stop);
if Stop = 0 then
Exit;
Inc(Stop, 3 + Length(AName));
Inc(Closes);
Content := Copy(Text, Start, Stop - Start);
Opens := 0;
Index := 1;
repeat
Inc(Opens);
Index := Pos('<' + AName, Content, Index + 1);
until Index = 0;
until Opens = Closes;
end;
Result := True;
AIndex := Stop;
end;
function TFastXML.GetString(const AName: string; ADefault: string = ''): string;
var
Start, Stop: Integer;
begin
Start := Pos(AName, Text);
while Start > 0 do
begin
if (Text[Start - 1] = '<') then
begin
case Text[Start + Length(AName)] of
'/': Exit(ADefault);
'>':
begin
Inc(Start, Length(AName) + 1);
Stop := Pos('</' + AName + '>', Text, Start);
if Stop = 0 then
Result := ADefault
else
Result := Copy(Text, Start, Stop - Start);
Exit;
end;
end;
end;
Start := Pos(AName, Text, Start + 1);
end;
Result := ADefault;
end;
function TFastXML.GetAttribute(const ANode, AName: string): string;
var
Start, Stop, Attr, Value: Integer;
begin
Start := Pos('<' + ANode, Text);
while Start > 0 do
begin
Stop := Pos('>', Text, Start);
Attr := Pos(AName + '="', Text, Start);
if (Attr > 0) and (Attr < Stop) then
begin
Inc(Attr, Length(AName) + 2);
Value := Pos('"', Text, Attr);
if (Value > 0) and (Value < Stop) then
begin
Result := Copy(Text, Attr, Value - Attr);
Exit;
end;
end;
Start := Pos('<' + ANode, Text, Start + 1);
end;
Result := '';
end;
function TFastXML.GetBool(const AName: string; ADefault: Boolean): Boolean;
var
Value: string;
begin
Value := GetString(AName);
if Value = '' then
Result := ADefault
else
Result := Value = 'TRUE';
end;
function TFastXML.GetInt(const AName: string; ADefault: Integer): Integer;
var
Value: string;
begin
Value := GetString(AName);
if Value = '' then
Result := ADefault
else
Result := StrToInt(Value);
end;
end. |
