Class tmsefilestream

Description
Hierarchy
Fields
Methods
Properties

Unit

msestream

Declaration

type tmsefilestream = class(thandlestream)

Description

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Hierarchy

Overview

Fields

Protected fmemorystream: tmemorystream;

Methods

Protected procedure setcapacity(const avalue: ptrint); virtual;
Protected procedure sethandle(value: integer); virtual;
Protected procedure closehandle(const ahandle: integer); virtual;
Protected constructor internalcreate(const afilename: filenamety; const aopenmode: fileopenmodety; const accessmode: fileaccessmodesty; const rights: filerightsty; out error: syserrorty); overload;
Protected function getsize: int64; override;
Protected function inheritedgetsize: int64;
Protected function inheritedread(var buffer; count: longint): longint;
Protected function inheritedwrite(const buffer; count: longint): longint;
Protected function inheritedseek(const offset: int64; origin: tseekorigin): int64;
Protected function getmemory: pointer; override;
Public constructor create(const afilename: filenamety; const aopenmode: fileopenmodety = fm_read; const accessmode: fileaccessmodesty = []; const rights: filerightsty = defaultfilerights); overload;
Public constructor createtransaction(const afilename: filenamety; rights: filerightsty = defaultfilerights); overload;
Public constructor createtempfile(const prefix: filenamety; out afilename: filenamety);
Public constructor create(ahandle: integer); overload; virtual;
Public constructor create; overload;
Public constructor create(const aopenmode: fileopenmodety); overload;
Public constructor createstringcopy(const adata: string);
Public destructor destroy; override;
Public class function trycreate(out ainstance: tmsefilestream; const afilename: filenamety; const aopenmode: fileopenmodety = fm_read; const accessmode: fileaccessmodesty = []; const rights: filerightsty = defaultfilerights): syserrorty;
Public function releasehandle(): filehandlety override;
Public function read(var buffer; count: longint): longint; override;
Public function write(const buffer; count: longint): longint; override;
Public function seek(const offset: int64; origin: tseekorigin): int64; override;
Public function readdatastring: string; override;
Public procedure writedatastring(const value: rawbytestring); override;
Public function isopen: boolean;
Public function close: boolean;
Public procedure cancel;
Public procedure flushbuffer; virtual;
Public procedure flush; virtual;
Public procedure setsize(const newsize: int64); override;
Public procedure clear; virtual;

Properties

Public property filename: filenamety read ffilename;
Public property openmode: fileopenmodety read fopenmode;
Public property transactionname: filenamety read ftransactionname;
Public property ismemorystream: boolean read fismemorystream;
Public property capacity: ptrint read getcapacity write setcapacity;
Public property filerights: filerightsty read getfilerights write setfilerights;
Public property cryptohandler: tcustomcryptohandler read fcryptohandler write setcryptohandler;

Description

Fields

Protected fmemorystream: tmemorystream;

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Methods

Protected procedure setcapacity(const avalue: ptrint); virtual;

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Protected procedure sethandle(value: integer); virtual;

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Protected procedure closehandle(const ahandle: integer); virtual;

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Protected constructor internalcreate(const afilename: filenamety; const aopenmode: fileopenmodety; const accessmode: fileaccessmodesty; const rights: filerightsty; out error: syserrorty); overload;

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Protected function getsize: int64; override;

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Protected function inheritedgetsize: int64;

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Protected function inheritedread(var buffer; count: longint): longint;

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Protected function inheritedwrite(const buffer; count: longint): longint;

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Protected function inheritedseek(const offset: int64; origin: tseekorigin): int64;

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Protected function getmemory: pointer; override;

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Public constructor create(const afilename: filenamety; const aopenmode: fileopenmodety = fm_read; const accessmode: fileaccessmodesty = []; const rights: filerightsty = defaultfilerights); overload;

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Public constructor createtransaction(const afilename: filenamety; rights: filerightsty = defaultfilerights); overload;

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Public constructor createtempfile(const prefix: filenamety; out afilename: filenamety);

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Public constructor create(ahandle: integer); overload; virtual;

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Public constructor create; overload;

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Public constructor create(const aopenmode: fileopenmodety); overload;

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Public constructor createstringcopy(const adata: string);

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Public destructor destroy; override;

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Public class function trycreate(out ainstance: tmsefilestream; const afilename: filenamety; const aopenmode: fileopenmodety = fm_read; const accessmode: fileaccessmodesty = []; const rights: filerightsty = defaultfilerights): syserrorty;

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Public function releasehandle(): filehandlety override;

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Public function read(var buffer; count: longint): longint; override;

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Public function write(const buffer; count: longint): longint; override;

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Public function seek(const offset: int64; origin: tseekorigin): int64; override;

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Public function readdatastring: string; override;

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Public procedure writedatastring(const value: rawbytestring); override;

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Public function isopen: boolean;

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Public function close: boolean;

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Public procedure cancel;

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Public procedure flushbuffer; virtual;

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Public procedure flush; virtual;

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Public procedure setsize(const newsize: int64); override;

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Public procedure clear; virtual;

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Properties

Public property filename: filenamety read ffilename;

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Public property openmode: fileopenmodety read fopenmode;

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Public property transactionname: filenamety read ftransactionname;

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Public property ismemorystream: boolean read fismemorystream;

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Public property capacity: ptrint read getcapacity write setcapacity;

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Public property filerights: filerightsty read getfilerights write setfilerights;

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Public property cryptohandler: tcustomcryptohandler read fcryptohandler write setcryptohandler;

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