File reading and writing method and system based on buffering alignment

Abstract

The invention discloses a file reading and writing method based on buffering alignment. The method comprises the following steps: if a program reading and writing request is in the presence, judging whether an internal buffer contains data to be read or not, if the internal buffer contains the data to be read, directly returning the data to be read, and otherwise, calculating a position and a size which need to be read after align is carried out according to a preset unit of a file, wherein the size is the integral multiple of the preset unit; on the basis of the position and the size which need to be read, calling a system API (Application Programming Interface) to read the data and cache the data to the internal buffer; and according to practical requirements, returning the data to be read. The invention also discloses a file reading and writing system based on the buffering alignment. The technical scheme of the invention can effectively reduce system API calling frequencies and time and improve file reading and writing performance.

Description

technical field [0001] The invention relates to the field of network information security, in particular to a method and system for reading and writing files based on buffer alignment. Background technique [0002] Traditional file reading and writing methods usually call the system API (Application Programming Interface) to operate the disk to obtain the data of the specified location and size of the file. [0003] Traditional file reading and writing methods have some disadvantages in certain application scenarios. For example, when files need to be frequently fragmented to read and write, the application system will frequently call system APIs to obtain data, which increases the number of times and time spent calling system APIs, and reduces file read and write performance. Contents of the invention [0004] The present invention provides a file reading and writing method and system based on buffer alignment. By realizing the internal buffer area inside the program, be...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a file reading and writing method and system based on buffer alignment. By realizing the internal buffer area inside the program, before calling the system API to obtain data, it is judged whether there is data to be read in the internal buffer area, and if so, directly Return to avoid the problem of frequent calls to system APIs, which consume too much time

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