Unlock instant, AI-driven research and patent intelligence for your innovation.

File delete method and file open method

A file deletion and file technology, applied in file systems, digital data information retrieval, special data processing applications, etc., can solve the problem of extended search time

Inactive Publication Date: 2009-01-28
SOCIONEXT INC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when there are a large number of files to be processed, the search time in the directory is greatly increased

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • File delete method and file open method
  • File delete method and file open method
  • File delete method and file open method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] figure 1 is a block diagram of the configuration of the file deletion processing unit according to the first embodiment of the present invention.

[0042] figure 1 The shown file deletion processing unit is a middleware that outputs an instruction corresponding to an instruction to delete a file satisfying a predetermined condition.

[0043] exist figure 1 Among them, the file deletion processing unit 10 includes: a directory entry acquisition unit 11, which is used to obtain a cluster of directory entry information about the directory that stores the file to be deleted from the actual data area in the auxiliary storage device in the primary storage device; Retrieval / condition determining unit 13, for searching data in the directory entry information obtained, to determine whether there is a certain file in the directory entry, and if there is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A proposed file delete method is a method used by a computer or a file processing device performing a process of outputting to a device driver a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, and includes: a step of obtaining in primary storage from an actual data area in secondary storage the directory entry information in a directory storing a file to be deleted; a step of adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition; a step of writing a result of the delete mark adding process to a corresponding portion of the actual data area in the secondary storage; and a step of freeing FAT information stored in the secondary storage corresponding to the delete mark added file.

Description

technical field [0001] The present invention relates to a file deletion method and a file opening method, and more particularly, to a file deletion method for a specific situation and a file opening method as a preprocessing (such as a file preview process) of file processing performed under a specific situation. Background technique [0002] There is a FAT file system as one of middleware provided between applications and device drivers. For example, Non-Patent Document 1 describes a process such as a process of reading a directory entry in a FAT file system. There also exists Non-Patent Document 2 as a specification of the FAT file system. FAT is an abbreviation for File Allocation Table, and the FAT file system refers to a file system used by Microsoft's OS such as MS-DOS, Windows (registered trademark), and the like. [0003] For example, a digital camera can store image files of tens of thousands of orders in a storage medium (also called an auxiliary storage device) ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F17/30067G06F16/162G06F9/06
Inventor 阿部直树
Owner SOCIONEXT INC