unitparser.pas

图象处理的一些相关内容 不是很难的,实现简单,希望对大家有帮助

unit UnitParser;

interface
uses classes,Sysutils,comctrls;

type
  TParser=class
  private

    { Private declarations }
  public
    procedure getchar;
    function  NextCh:char;
    procedure concat;
    procedure SetSrcFileName(AFileName:string);
    procedure SetDesFileName(AFileName:string);

    procedure AddHead(AFileName:string);virtual; abstract;
    procedure AddTail(copyright:string);virtual; abstract;
    procedure getbc; virtual; abstract;
    function  IsLetter:boolean; virtual; abstract;
    function  IsDigit:boolean;  virtual; abstract;
    function  IsReserve:boolean; virtual; abstract;
    procedure Convert(AProgressBar:TProgressBar); virtual; abstract;
    procedure BeginString;virtual; abstract;
    procedure EndString; virtual; abstract;
    procedure BeginKeyword; virtual; abstract;
    procedure EndKeyword; virtual; abstract;
    procedure BeginComment; virtual; abstract;
    procedure EndComment; virtual; abstract;
    procedure BeginDigit; virtual; abstract;
    procedure EndDigit; virtual; abstract;
    procedure BeginSymb; virtual; abstract;
    procedure EndSymb; virtual; abstract;
    procedure BeginIndint; virtual; abstract;
    procedure EndIndint; virtual; abstract;
    function  CovertSpecialCh(var s:string):boolean; virtual; abstract;
    { Public declarations }
  protected
    FKeywords: TStrings;
    Token:string;
    ch:char;
    SrcFileName:string;
    DesFileName:string;
    OutStr:string;
    SrcFile:TFileStream;
    DesFile:TfileStream;
  end;
implementation

{ TParser }

procedure TParser.concat;
begin
  token:=token+ch;
end;

procedure TParser.getchar;
begin
  SrcFile.Read(ch,sizeof(char));
end;

function TParser.NextCh: char;
var
  chTem:char;
begin
  SrcFile.Read(chTem,sizeof(char));
  result:=chTem;
  srcfile.Position:=srcfile.Position-1;
end;

procedure TParser.SetDesFileName(AFileName: string);
begin
  DesFileName:=AFileName;
end;


procedure TParser.SetSrcFileName(AFileName: string);
begin
  SrcFileName:=AFileName;
end;

end.